close

Вход

Забыли?

вход по аккаунту

?

JPWO2014132392

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPWO2014132392
Abstract: Provided are a method and an apparatus for manufacturing a laminate capable of
making the thickness of a diaphragm layer constituting the laminate uniform. In a method of
manufacturing a speaker diaphragm as an example of a laminate, a first suspension (K1) and a
second suspension (K2) containing materials (4a1, 4b1) are sequentially injected into a tank (30).
And a diaphragm layer forming step of dewatering the liquid component in the tank (30). Then,
in the diaphragm layer forming step, the second suspension (K2) is injected in the liquid in the
tank (30).
Method of manufacturing laminate
[0001]
The present invention relates to a method and an apparatus for manufacturing a laminate.
[0002]
Patent Document 1 discloses a method of manufacturing a speaker diaphragm as a conventional
laminate.
In this speaker diaphragm manufacturing method, a suspension containing a material of each
diaphragm layer is sequentially separated in a common paper-making tank, with a liquid layer
not containing the material of each diaphragm layer constituting the speaker diaphragm being
separated. The suspension is injected, and the suspension is sequentially formed to laminate a
10-05-2019
1
plurality of diaphragm layers.
[0003]
JP 2007-208906 A
[0004]
However, in the method of manufacturing the speaker diaphragm disclosed in Patent Document
1, since the material of the diaphragm layer is dropped from above onto the liquid in the tank,
the liquid level in the tank is easily disturbed.
The disturbance of the liquid surface affects the deposited layer formed by precipitation of the
material of the diaphragm layer formed in the lower part of the tank, and causes the thickness of
the diaphragm layer constituted by the deposited layer to also be disturbed. It becomes.
Therefore, the problem of making the thickness of the diaphragm layer uniform can be
mentioned as an example.
[0005]
Then, this invention makes it a subject to provide the manufacturing method and manufacturing
apparatus of the laminated body which can make thickness of the diaphragm layer which
comprises a laminated body uniform.
[0006]
The invention described in claim 1 includes a step of sequentially pouring a first liquid and a
second liquid into a tank and dewatering the tank, in order to solve the above-mentioned
problems, and in the step, the tank It is a manufacturing method of a layered product
characterized by pouring the 2nd above-mentioned liquid in inside liquid.
[0007]
In order to solve the above problems, the invention described in claim 2 includes a tank, a liquid
injection device, and a dehydrating device, and the liquid injection port connected to the liquid
injection device is the tank. And a dewatering port connected to the dewatering device, wherein
the liquid inlet is provided at a lower portion of the tank.
10-05-2019
2
[0008]
It is a figure for demonstrating the diaphragm for speakers manufactured by the manufacturing
method which concerns on one Example of this invention, Comprising: (a) is a diaphragm for
speakers manufactured by the manufacturing method which concerns on one Example of this
invention (B) is a cross-sectional view for explaining the speaker diaphragm shown in (a), (c) is a
half sectional view for explaining a speaker device adopting It is a cross-sectional enlarged view
of the diaphragm for speakers shown.
It is a figure for demonstrating the manufacturing apparatus of the diaphragm for speakers
which concerns on one Example of this invention, and the 1st diaphragm layer forming process
of the manufacturing method of the diaphragm for speakers which concerns on one Example of
this invention It is a figure for demonstrating an example.
It is a figure for demonstrating an example of the liquid layer injection | pouring process of the
manufacturing method of the speaker diaphragm concerning one Example of this invention.
It is a figure for demonstrating an example of the 2nd diaphragm layer forming process of the
manufacturing method of the speaker diaphragm concerning one Example of this invention. It is
a figure for demonstrating an example of a mode that it deposits after injection | pouring of the
suspension liquid which included the material of the 2nd diaphragm layer. It is a figure for
demonstrating an example of the formation process of the manufacturing method of the
diaphragm for speakers. It is a figure for demonstrating an example of the other shaping |
molding process of the manufacturing method of the diaphragm for speakers. It is a figure for
demonstrating the structure of the modification of the diaphragm for speakers of FIG. 1,
Comprising: (a) is sectional drawing for demonstrating the diaphragm for speakers, (b) is a figure
to (a). It is a cross-sectional enlarged view of the diaphragm for speakers shown. It is a figure for
demonstrating the structure of the modification of the manufacturing apparatus of the
diaphragm for speakers shown in FIG. It is a figure for demonstrating the structure of the other
modification of the manufacturing apparatus of the diaphragm for speakers shown in FIG.
[0009]
Hereinafter, the manufacturing method of the layered product concerning one embodiment of
the present invention is explained.
10-05-2019
3
[0010]
The method of manufacturing a laminate according to an embodiment of the present invention
includes the steps of sequentially injecting a first liquid and a second liquid containing materials
into the tank and dewatering the tank.
Then, in this step, the second liquid is injected in the liquid in the tank. Since it did in this way,
compared with the method of throwing in the material of a layered product from the upper part
of a tank, it is possible to suppress the disturbance (waving) generated on the liquid level of the
liquid in the tank. It is possible to suppress the disturbance that occurs in the thickness of
[0011]
The dewatering may be continued from the end of the injection of the first liquid to the end of
the injection of the second liquid. By doing so, the floating of the material deposited in the tank
can be suppressed.
[0012]
In addition, dehydration may be started before the injection of the second liquid. By doing so, the
floating of the material contained in the first liquid deposited in the tank can be suppressed.
[0013]
In addition, a predetermined period may be provided between the end of the injection of the first
liquid and the start of the injection of the second liquid. By doing this, the material contained in
the first liquid will wait for precipitation and deposition, and the material contained in the first
liquid and the material contained in the second liquid may be mixed. It can be suppressed.
[0014]
10-05-2019
4
Further, the liquid in the tank may be equal to or higher than a predetermined water level within
a predetermined period from the end of the injection of the first liquid to the start of the injection
of the second liquid. By doing this, the second liquid can be injected into the liquid in the tank.
[0015]
In addition, the liquid may be injected in the liquid in the tank within a predetermined period
from the end of the injection of the first liquid to the start of the injection of the second liquid. By
doing this, the second liquid can be injected into the liquid in the tank. In addition, the first liquid
and the second liquid can be sequentially injected while separating the liquid layers not
containing the material of each layer constituting the laminate, and the material contained in the
first liquid is deposited on the net. The material contained in the second liquid can be deposited
on the layer to form a multilayer.
[0016]
Alternatively, the second liquid may be injected from the wall of the tank. By doing this, it is
possible to suppress the disturbance (waving) that occurs on the liquid surface of the liquid in
the tank, so it is possible to further suppress the disturbance that occurs in the thickness of each
layer that constitutes the laminate.
[0017]
The material contained in the first liquid and the second liquid may contain fibers. In this way, in
the boundary portion between the layer formed by the first liquid and the layer formed by the
second liquid, the materials of the respective layers can be more entangled with each other to
enhance the integrity of the layers. .
[0018]
Moreover, the laminated body manufacturing apparatus which concerns on one Embodiment of
this invention is equipped with the tank, the liquid injection apparatus, and the spin-drying |
10-05-2019
5
dehydration apparatus. The tank comprises a liquid inlet connected to the liquid injection device
and a dewatering port connected to the dewatering device. And a liquid inlet is provided at the
lower part of the tank. Thus, when the liquid is in the tank, it is possible to inject an external
liquid from the liquid inlet provided at the lower part of the tank into the liquid in the tank.
Therefore, compared with the manufacturing apparatus which throws in the material of a
laminated body from the upper part of a tank, since the disorder (waviness) which arises in the
liquid level of the liquid in a tank can be suppressed, it arises in the thickness of each layer which
comprises a laminated body. The disturbance can be suppressed.
[0019]
Also, a liquid inlet may be provided on the wall of the tank. By doing this, it is possible to
suppress the disturbance (waving) that occurs on the liquid surface of the liquid in the tank, so it
is possible to further suppress the disturbance that occurs in the thickness of each layer that
constitutes the laminate.
[0020]
In addition, the liquid inlet may be annularly formed. By doing this, it is possible to inject the
liquid evenly over the circumferential direction of the tank, and it is possible to suppress the
disturbance (waving) generated on the liquid level of the liquid in the tank. Therefore, the
disorder which arises in the thickness of each layer which constitutes a layered product can
further be controlled.
[0021]
In addition, a net provided facing the dewatering port and a sloped surface provided on the outer
circumference of the net may be provided. By doing so, the material contained in the liquid can
be collected in the net by the inclined surface portion.
[0022]
Moreover, you may further provide a liquid level detection apparatus. In this way, the liquid level
10-05-2019
6
detection device can detect the liquid level height of the liquid in the tank, and furthermore, the
liquid level height in the tank can be monitored, and the liquid level in the tank can be
maintained properly. Can.
[0023]
Also, the wall of the tank may be made of a light transmitting material. By doing this, it is
possible to monitor the liquid level from outside the tank by visual inspection or by an optical
sensor, and it is possible to maintain the liquid level in the tank appropriately.
[0024]
Hereinafter, an apparatus and a method for manufacturing a speaker diaphragm according to an
embodiment of the present invention, and a speaker diaphragm manufactured using this
manufacturing method will be described with reference to the drawings.
[0025]
First, the configuration of the speaker diaphragm will be described, and then the manufacturing
apparatus and method of the speaker manufacturing plate will be described.
[0026]
(Structural Example of Speaker Diaphragm) Hereinafter, a structural example of the speaker
diaphragm will be described with reference to FIG.
[0027]
FIG. 1 is a view for explaining a speaker diaphragm manufactured by a manufacturing method
according to an embodiment of the present invention.
FIG. 1 (a) is a half sectional view for explaining a speaker device employing a speaker diaphragm
manufactured by the manufacturing method according to one embodiment of the present
invention.
10-05-2019
7
FIG. 1 (b) is a cross-sectional view for explaining the speaker diaphragm shown in FIG. 1 (a).
FIG. 1 (c) is an enlarged sectional view of the speaker diaphragm shown in FIG. 1 (b).
[0028]
A speaker device 10 employing a speaker diaphragm manufactured by a manufacturing method
according to one embodiment of the present invention is a magnetic circuit formed by a magnet
1A, a plate 1B, and a yoke 1C as shown in FIG. 1 (a). The voice coil 3 is disposed in the magnetic
gap of the magnetic circuit 1 and is wound around the voice coil support 2. The speaker
diaphragm 4 has a central portion fixed to the voice coil support 2. The outer peripheral edge of
the speaker diaphragm 4 is fixed to the frame 7 via the edge 5 and the gasket 6. The voice coil
support 2 is fixed to the frame 7 by a damper 8, and the opening of the voice coil support 2 is
covered by a center cap 9.
[0029]
The speaker diaphragm 4 has a multilayer structure in which a plurality of diaphragm layers are
stacked. As shown in FIGS. 1B and 1C, the speaker diaphragm 4 has a first diaphragm layer 4a
and a second diaphragm layer 4b formed of a paper-made body formed by paper-making. The
speaker diaphragm 4 is an example of a laminated body, and an example of a multilayer papermade body. Each of the first diaphragm layer 4a and the second diaphragm layer 4b corresponds
to an example of a sheet-formed body. Here, although the speaker diaphragm 4 having a twolayer structure is described, the present invention is not limited to this embodiment, and the
speaker diaphragm 4 may have a multilayer structure of three or more layers. In addition, the
configuration of the speaker diaphragm to be described later may be diverted to the speaker
diaphragm on which the speaker edge or the speaker diaphragm and the speaker edge are
integrally formed, or the center cap. In this case, the speaker edge has a multilayer structure in
which a plurality of edge layers are stacked, the speaker vibrating body has a multilayer
structure in which a plurality of vibrator layers are stacked, and the center cap is a plurality of
center cap layers stacked. It will have a multilayer structure.
[0030]
10-05-2019
8
In the plurality of diaphragm layers of the speaker diaphragm 4, the outermost layer on the side
on which the center cap 9 is provided corresponds to an example of the surface layer. The first
diaphragm layer 4a corresponds to an example of the other layer, and the second diaphragm
layer 4b corresponds to an example of one layer and a surface layer.
[0031]
Each diaphragm layer of the speaker diaphragm 4 is made of a material. The material is, for
example, wood pulp fiber, non-wood pulp fiber, chemical fiber, synthetic fiber, animal fiber,
vegetable fiber, organic fiber, inorganic fiber, inorganic fiber, glass fiber, carbon fiber, fibrous
material such as ceramic fiber, mica powder, graphite And particulate materials such as carbonbased materials, metal materials, ceramic materials, and resins. The "material" also includes, for
example, the aforementioned powder, hollow particles, fibers and the like. The material 4a1 of
the first diaphragm layer 4a and the material 4b1 of the second diaphragm layer 4b may be
different types of materials or may be the same type of material.
[0032]
As will be described later, between the diaphragm layers of the speaker diaphragm 4, a plurality
of liquid crystals not including the material of each diaphragm layer are separated, and a
suspension including the material of the diaphragm layer is sequentially formed into a paper The
diaphragm layers of are laminated, and the diaphragm layers are integrated. At this time, the
materials of the two adjacent diaphragm layers are bonded to each other by a chemical bond (the
chemical bond includes van der Waals force, hydrogen bond, metal bond and the like).
Particularly when the material is a natural fiber, it is bonded by hydrogen bonding. The
suspension corresponds to an example of the first liquid and the second liquid. The speaker
diaphragm 4 having this structure has a relatively large coupling force between the diaphragm
layers, so that problems such as delamination can be prevented. In the speaker diaphragm 4
having a structure laminated by paper forming, an entangled portion 4z in which fibrous
materials (in particular, fibers) of the diaphragm layers are intertwined is formed at the boundary
between the diaphragm layers. . The diaphragm layers are integrally formed by the entangled
portion 4z, the integral force (including the coupling force) between the diaphragm layers is
increased, and problems such as delamination can be suppressed.
[0033]
The thickness of the first diaphragm layer 4a and the second diaphragm layer 4b is the thickness
10-05-2019
9
of the entangled portion 4z formed at the boundary between the first diaphragm layer 4a and the
second diaphragm layer 4b of the speaker diaphragm 4 Preferably, the thickness is smaller than
the thickness of the first diaphragm layer 4a or the thickness of the second diaphragm layer 4b
so as to have a predetermined thickness.
[0034]
(Embodiment of Apparatus and Method for Manufacturing Speaker Diaphragm) The apparatus
and method for manufacturing a speaker diaphragm according to an embodiment of the present
invention will be described below with reference to FIGS.
[0035]
FIG. 2 is a view for explaining a manufacturing apparatus of a speaker diaphragm according to
an embodiment of the present invention, and is a first diaphragm layer forming method of a
speaker diaphragm according to an embodiment of the present invention. It is a figure for
demonstrating an example of a process.
FIG. 3 is a view for explaining an example of a liquid layer injection step of the method of
manufacturing the speaker diaphragm according to the embodiment of the present invention.
FIG. 4 is a view for explaining an example of the second diaphragm layer forming step of the
method for manufacturing the speaker diaphragm according to the embodiment of the present
invention. FIG. 5 is a view for explaining an example of the state of deposition after the injection
of the suspension liquid containing the material of the second diaphragm layer. FIG. 6 is a view
for explaining an example of the molding process of the method of manufacturing the speaker
diaphragm. FIG. 7 is a view for explaining an example of another forming step of the method of
manufacturing the speaker diaphragm.
[0036]
The manufacturing apparatus 20 for a speaker diaphragm according to the present embodiment
is a suspension in which the material of the diaphragm layer is included in the common tank for
papermaking, with the liquid layer not including the material of the diaphragm layer being
separated. The solution is sequentially injected, the suspension is sequentially formed, and a
10-05-2019
10
plurality of diaphragm layers are stacked. The manufacturing apparatus 20 of the speaker
diaphragm corresponds to an example of a laminate manufacturing apparatus.
[0037]
An apparatus 20 for manufacturing a speaker diaphragm according to an embodiment of the
present invention includes, as shown in FIG. 2, a tank 30, a dehydrating apparatus 61, a liquid
injection apparatus 62, and a control apparatus 70.
[0038]
The tank 30 includes a tank body 31, a papermaking unit 40, and a liquid injection unit 50.
[0039]
The tank main body 31 is formed in a cylindrical shape (cylindrical shape in the illustrated
example) using a light transmitting material such as acrylic, for example, and a suspension
containing a liquid such as water or a diaphragm material inside thereof. Liquid such as liquid is
injected.
That is, the tank body 31 contains the liquid.
The tank main body 31 corresponds to an example of a tank wall (in the illustrated example, the
wall is formed in a tubular shape).
[0040]
The papermaking section 40 includes an attachment portion 41, a mold 42, a net 43, and an
inclined surface portion 44. The mounting portion 41 is formed in a concave shape, and the mold
42, the net 43 and the inclined surface portion 44 are disposed in the mounting portion 41. A
connection port 41B as an example of a dewatering port to which a dewatering device 61
described later is connected is provided at a central portion of the bottom of the attachment
portion 41, and a valve is provided at the connection port 41B. The mold 42 includes a plurality
of suction ports 42A and a support surface 42B to which the plurality of suction ports 42A are
attached and which supports the mesh 43. The plurality of suction ports 42A are connected to
10-05-2019
11
the dehydrating apparatus 61. The support surface 42B is formed in a concave shape, and the
mesh 43 is disposed on the support surface 42B. The inclined surface portion 44 is connected to
the outer peripheral portion 43 a of the mesh 43.
[0041]
The mesh 43 is formed in, for example, a shape prescribed in advance according to the shape of
the speaker diaphragm, and is formed in a cone shape in the present embodiment. In the mesh
43, for example, a plurality of holes are formed, and of the suspension containing the material of
the diaphragm layer, the material is deposited on the mesh 43 and the liquid is allowed to pass
through the holes. For example, wire mesh or punching metal can be employed as the mesh 43.
The inclined surface portion 44 is a cylindrical (in the illustrated example, cylindrical) member
formed in an inclined surface shape (a tapered surface shape) in which the inner peripheral
surface gradually decreases in internal diameter from the upper end 44a toward the lower end
44b . The edge of the lower end 44b of the inclined surface portion 44 is connected to the outer
peripheral portion 43a of the net 43 over the entire circumference. The edge of the upper end 44
a of the inclined surface portion 44 is supported by the mounting portion 41 over the entire
circumference.
[0042]
In the papermaking section 40, a stepped portion 41C formed at the edge on the upper end side
of the attachment portion 41 is detachably fitted to the lower end of the tank main body 31.
Further, at this time, the tank main body 31, the attachment portion 41, the mold 42 and the net
43 are arranged such that their respective axis centers on the axis L.
[0043]
The liquid injection unit 50 includes a liquid injection port 51 and a conduit 52. The liquid inlet
51 is opened in a slit shape (i.e., an annular shape) on the inner peripheral surface 31 a of the
tank body 31 at the lower portion of the tank body 31 (i.e., the lower portion of the tank 30).
Thereby, the liquid can be injected from the liquid inlet 51 over the entire circumferential
direction of the tank body 31. In the present embodiment, the liquid inlet 51 is disposed below
the tank 30 and above the papermaking section 40 (specifically, the upper end 44 a of the
inclined surface section 44). The conduit 52 is connected to the liquid inlet 51 and is configured
10-05-2019
12
to lead the liquid supplied from the liquid injector 62 to the liquid inlet 51.
[0044]
The dewatering device 61 includes, for example, a suction pump, and is connected to each
suction port 42A of the mold 42. The dewatering device 61 sucks the liquid and the like in the
liquid stored in the tank main body 31 through a net 43 provided in the lower part of the tank
30. The dewatering device 61 is connected to the control device 70 and operates in response to a
control signal from the control device 70.
[0045]
The liquid injection device 62 includes a storage tank for containing the liquid to be injected into
the tank 30, and a pump (not shown) for delivering the liquid contained in each storage tank to
the conduit 52 connected to the tank 30. One or more storage tanks may be provided, and the
liquid may be stored in the storage tank for each different type of liquid. The liquid injection
device 62 is connected to the control device 70 and operates in response to a control signal from
the control device 70.
[0046]
The control device 70 is configured to include, for example, a microcomputer and the like, and
controls the entire manufacturing device 20 in an integrated manner to realize the function
according to the present invention. The control device 70 controls the operation of the
dewatering device 61, the liquid injection device 62, and the like. Under the present
circumstances, as shown in FIG. 2, the control apparatus 70 performs said control based on the
detection result of the sensor 32 provided in the tank 30. As shown in FIG. The sensor 32 detects
characteristics of the liquid or material in the tank 30, such as the level of the liquid, the degree
of dispersion of the material in the liquid, the degree of flow of the liquid, and the like, and
outputs a signal indicating the detection result to the control device 70 Do.
[0047]
In addition, as described later, the tank 30 is formed of the tank main body 31 so that the
suspension liquid containing the material of the diaphragm layer can be sequentially injected,
10-05-2019
13
with the liquid layer not containing the material of the diaphragm layer separated. Preferably, the
length is greater than a predetermined length.
[0048]
Next, a method of manufacturing a speaker diaphragm according to an embodiment of the
present invention using the manufacturing apparatus 20 will be described with reference to the
drawings.
In the present embodiment, water is employed as the liquid contained in the liquid used for
papermaking.
[0049]
The method of manufacturing the speaker diaphragm includes (1) diaphragm layer forming step
and (2) forming step. The diaphragm layer forming step includes (1-a) first diaphragm layer
forming step, (1-b) liquid layer injection step, and (1-c) second diaphragm layer forming step as
sub-steps. .
[0050]
(1) Diaphragm Layer Forming Step In the diaphragm layer forming step, the first suspension K1
and the second suspension K2 containing materials for forming each diaphragm layer are
sequentially injected into the tank 30, and the inside of the tank 30 is formed. Dehydrate the
solution. The first suspension K1 corresponds to an example of the first liquid, and the second
suspension K2 corresponds to an example of the second liquid.
[0051]
(1-a) First diaphragm layer forming step First, as shown in FIG. 2, the first suspension K1
containing the material 4a1 of the first diaphragm layer 4a is poured into the tank 30. At this
time, the liquid injection device 62 is controlled by the control device 70, and the first
10-05-2019
14
suspension liquid K1 prepared in advance with the material 4a1 contained in water is injected
from the liquid injection port 51. Alternatively, the material 4a1 may be injected (charged) into
the tank 30 while injecting a liquid such as water into the tank 30 from the upper end opening of
the tank 30. The method of injecting the first suspension K1 which is first injected into the tank
30 is optional. In the tank 30, a first suspension liquid layer R51 in which the material 4a1 is
dispersed in water is formed. In the mesh 43 of the prescribed shape, liquid (i.e., water) passes
through and is dehydrated, and the material 4a1 is deposited on the mesh 43. At this time, the
dewatering device 61 may be controlled by the control device 70 to forcibly suction and dewater
the liquid, or may be dewatered by free fall without forced suction. In the first diaphragm layer
forming step, the injection speed of the first suspension K1, the dehydration speed of the liquid,
and the like are appropriately adjusted so that the water level of the liquid in the tank 30 does
not become lower than the liquid injection port 51.
[0052]
(1-b) Liquid Layer Injection Step After injecting the material 4a1 of the first diaphragm layer 4a
into the tank 30, as shown in FIG. 3, the control unit 70 controls the liquid injection device 62 to
predefine it. An amount of liquid W (water) is injected from the liquid inlet 51. At this time, in a
state where the liquid level in the tank 30 is at a position higher than the liquid inlet 51, the
liquid W is injected in the liquid in the tank 30. Moreover, it is preferable to inject the liquid W at
such a speed that the liquid level in the tank 30 is not disturbed (corrugated). In the tank 30, a
liquid layer R52 not containing the material of the diaphragm layer is formed. The thickness (the
length along the vertical direction of the tank 30) of the liquid layer R52 may be determined
according to various conditions such as the specific gravity of the material of each diaphragm
layer, the falling speed of the material in the liquid, etc. preferable. At this time, the control
device 70 may control the dewatering device 61 to forcibly suck the liquid for dehydration, or
the liquid may be dewatered by free fall without forced suction. Also in the liquid layer injection
step, the injection speed of the liquid W, the dewatering speed of the liquid, and the like are
appropriately adjusted so that the water level in the tank 30 does not become lower than the
liquid injection port 51.
[0053]
(1-c) After the second diaphragm layer forming step solution W is poured into the tank 30, as
shown in FIG. 4, the second suspension K2 prepared in advance by adding the material 4b1 to
water is poured into the liquid It is injected into the tank 30 from the inlet 51. At this time, in a
state where the water level in the tank 30 is at a position higher than the liquid inlet 51, the
10-05-2019
15
second suspension K2 is injected in the liquid in the tank 30. Further, it is preferable to inject the
second suspension K2 at such a speed that the liquid level in the tank 30 is not disturbed
(corrugated). In the tank 30, a second suspension liquid layer R53 in which the material 4b1 is
dispersed in water is formed. In the mesh 43, the liquid (ie, water) passes and is dehydrated, and
the material 4b1 of the second diaphragm layer 4b is deposited so as to overlap on the material
4a1 of the first diaphragm layer 4a deposited on the mesh 43 . At this time, the liquid may be
forcibly sucked and dewatered by the dewatering device 61, or the liquid may be dewatered by
free fall without forced suction.
[0054]
Further, as shown in FIG. 5, after the second suspension K2 is injected, the controller 70 controls
the liquid injection device 62 to inject a predetermined amount of liquid W from the liquid
injection port 51, A liquid layer R54 not including the material of the diaphragm layer may be
formed.
[0055]
Then, the liquid component (water) in the tank 30 is dewatered, and a multilayer paperfabricated body in which the material 4a1 of the first diaphragm layer 4a and the material 4b1 of
the second diaphragm layer are laminated on the mesh 43 is obtained.
[0056]
In the present embodiment, in the diaphragm layer forming step, the liquid layer injecting step is
interposed between the first diaphragm layer forming step and the second diaphragm layer
forming step.
That is, a predetermined period from the end of the injection of the first suspension K1
performed in the first diaphragm layer forming step to the start of the injection of the second
suspension K2 performed in the second diaphragm layer forming step. In the liquid in the tank
30, the liquid W not containing the material of each diaphragm layer is injected during this
predetermined period.
Further, by providing the above-mentioned predetermined period, the material 4a1 precipitates
and deposits on the mesh 43 after the injection of the first suspension K1, and the material of the
diaphragm layer is not included even if the liquid W is not injected. If the liquid layer R52 is
10-05-2019
16
formed, the liquid layer injecting step of injecting the water W in the predetermined period may
be omitted.
[0057]
Further, in the above process, the control device 70 performs the first process according to the
state of the first suspension liquid layer R51, the liquid layer R52 and the second suspension
liquid layer R53, the state of deposition (stacking) on the net, and the like. The injection timing
and injection rate of the suspension K1, the second suspension K2 and water W, or the
dehydration rate is adjusted. Not limited to this, for example, instead of the control device 70, the
dewatering device 61 and the liquid injection device 62 may be operated manually while a
worker visually checks the inside of the tank 30, and the like.
[0058]
Further, in the present embodiment, in the diaphragm layer forming step, since the papermaking
section 40 (specifically, the net 43) is provided in the lower part of the tank 30, dehydration
starts from the time when the liquid is injected into the tank 30. Then, the process is continued
until the liquid in the tank 30 is exhausted. However, for dehydration, if the material 4a1
included in the first suspension K1 and the material 4b1 included in the second suspension K2
are sequentially deposited and dehydrated on the mesh 43, the diaphragm layer forming step
The start time and duration of dehydration are optional. Further, since the material 4a1 included
in the first suspension K1 and the material 4b1 included in the second suspension K2 are
sequentially deposited, the start timing and duration of the dehydration can be arbitrarily
changed. For example, dehydration may be performed continuously from the end of the injection
of the first suspension K1 (including immediately after the end of the injection and after a while
after the end of the injection for a while) from the end of the injection of the second suspension
K1. The dehydration may be started at the latest before the start of the injection of the second
suspension.
[0059]
(2) Forming step In the diaphragm layer forming step described above, a multi-layered sheetformed body in which the material 4a1 of the first diaphragm layer 4a and the material 4b1 of
the second diaphragm layer formed on the net 43 are laminated , A precursor of the speaker
10-05-2019
17
diaphragm 4) by a molding method such as a hot press method, a wet press method, an oven
method or the like, and the speaker diaphragm 4 as shown in FIGS. 1 (b) and 1 (c) Make
Specifically, the multi-layered paper-made product is taken out from the mesh 43 and, as shown
in FIG. 6, for example, a female die 81 provided with a heating portion 811 and a male die 82
provided with a heating portion 821 The speaker diaphragm 4 having a predetermined shape is
manufactured by heating and pressurizing with a mold 80 having the same.
[0060]
Alternatively, the multi-layered paper-made product is taken out from the mesh 43, and, for
example, as shown in FIG. 7, the multi-layered paper-made product is placed in a mold 83 having
a hollow portion 831 placed in a drying kettle 800. While suctioning by the vacuum pump 832,
drying is performed by a heating device 84 such as a gas stove disposed above the mold 83. In
this method, the speaker diaphragm 4 is manufactured only by drying without applying pressure.
[0061]
Next, one specific example of a method of manufacturing a speaker diaphragm having a twolayer structure will be described.
[0062]
As a material 4a1 of the base material layer (the first diaphragm layer 4a), NBKP (softwoodbleached kraft pulp) of wood pulp fiber is adopted.
First, the NBKP of this wood pulp fiber is beaten, and it is set to a freeness of about 20 ° SR
(Shopper-Riegler) and dispersed in water, and a suspension having a concentration of about 1.0 g
/ L (first suspension) Prepare K1). As shown in FIG. 2, the first suspension K1 is injected into the
tank 30 from the liquid inlet 51. The material 4a1 starts to settle due to its own weight after
injection, but then it is dewatered by the dewatering device 61 from the suction port 42A of the
mold 42 and dewatered, the material 4a1 is placed on the mesh 43 of a predetermined shape.
Deposit on After the first suspension liquid K1 is injected, water W is continuously injected from
the liquid inlet 51 into the liquid in the tank 30, and as shown in FIG. 3, a liquid layer R52 not
containing the material of the diaphragm layer is formed. Do. During this time, dehydration is
continued.
10-05-2019
18
[0063]
Next, NBKP (softwood bleached kraft pulp) is adopted as the material 4b1 of the surface layer
(the second diaphragm layer 4b), and the material prepared by adjusting this NBKP to a beating
degree of about 20 ° SR is dispersed in water which is a liquid A suspension of about 1.0 g / L
(second suspension K2) is prepared in advance. After the injection of the liquid W, as shown in
FIG. 4, the second suspension K 2 is injected from the liquid inlet 51 in the liquid in the tank 30.
At this time, suction by the dewatering device 61 is continuously performed, and the material 4 b
1 is deposited on the net 43. The strength of suction at this time needs to be balanced with the
amount of water supplied. The dehydrating apparatus 61 according to the present embodiment
can adjust the vacuum pressure to about 0 to 500 mmHg (0 to 66,660 Pa). The tank body 31 is
removed from the papermaking section 40, and the mesh 43 is placed on the mold 80 of the
same shape and suctioned, whereby the deposited material is transferred onto the mold 80 as
shown in FIG. At this time, the mold 80 is heated to a temperature of about 160 ° C. and dried
by pressing at a pressure of about 2 kg / cm 2 (196 kPa) for about 40 seconds. In the example
described above, the first diaphragm layer 4a and the second diaphragm layer 4b may be dyed in
different color tones.
[0064]
As described above, according to the manufacturing method of this embodiment, the first
suspension K1 and the second suspension K2 containing the materials 4a1 and 4b1 are
sequentially injected into the tank 30, and the tank 30 is dewatered. It has a board layer
formation process. Then, in the diaphragm layer forming step, the second suspension K2 is
injected in the liquid in the tank 30. Since it did in this way, compared with the method of
throwing in the material of a diaphragm layer from the upper part of the tank 30, since the
disorder (wave) which arises in the liquid level of the liquid in the tank 30 can be suppressed,
The disturbance which arises in the thickness of each layer which comprises can be controlled.
Therefore, a laminate having a uniform thickness can be obtained.
[0065]
In addition, dehydration is continuously performed from the end of the injection of the first
suspension K1 to the end of the injection of the second suspension K2. Therefore, it is possible to
10-05-2019
19
suppress the floating of the material deposited on the papermaking section 40 (specifically, the
net 43) in the lower part of the tank 30.
[0066]
In addition, dehydration is started before the injection of the second suspension K2. Therefore, it
is possible to suppress the floating of the material 4a1 included in the first suspension K1
accumulated in the lower portion of the tank 30 (specifically, the net 43).
[0067]
Further, a predetermined period is provided between the end of the injection of the first
suspension K1 and the start of the injection of the second suspension K2. Therefore, it waits for
the material 4a1 contained in the first suspension K1 to precipitate and accumulate, and the
material 4a1 contained in the first suspension K1 and the material 4b1 contained in the second
suspension K2 Can be suppressed from being mixed.
[0068]
In addition, the liquid in the tank 30 is higher than the predetermined water level higher than
that of the liquid inlet 51 within a predetermined period from the end of the injection of the first
suspension K1 to the start of the injection of the second suspension K2. It is like that. Therefore,
the second liquid can be injected into the liquid in the tank.
[0069]
Also, within a predetermined period from the end of the injection of the first suspension K1 to
the start of the injection of the second suspension K2, the liquid in the tank 30 does not contain
the material of each diaphragm layer. It is made to inject W. Therefore, the first suspension K1
and the second suspension K2 can be sequentially injected, with the liquid layer R52 not
including the material forming the diaphragm layers constituting the speaker diaphragm 4
separated. The layer of the material 4a1 contained in the suspension K1 and the layer of the
material 4b1 contained in the second suspension K2 can be superposed.
10-05-2019
20
[0070]
Further, the second suspension K2 is injected from the liquid inlet 51 opened in the tank body 31
which is the wall portion of the tank 30. Therefore, it is possible to suppress the disturbance
(waving) generated on the liquid surface of the liquid in the tank 30, and therefore, the
disturbance generated in the thickness of each diaphragm layer constituting the speaker
diaphragm 4 can be suppressed.
[0071]
The materials contained in the first suspension K1 and the second suspension K2 contain fibers.
Therefore, in the boundary portion between the first diaphragm layer 4a formed by the first
suspension K1 and the second diaphragm layer 4b formed by the second suspension K2, the
materials of the respective layers are intertwined with each other. The bond between layers can
be enhanced.
[0072]
Further, as described above, the manufacturing apparatus 20 of the speaker diaphragm of the
present embodiment includes the tank 30, the liquid injection device 62, and the dehydrating
device 61. The tank 30 includes a liquid injection port 51 connected to the liquid injection device
62, and a connection port 41B which is a dewatering port connected to the dewatering device
61. The liquid inlet 51 is provided at the lower part of the tank 30. Since it did in this way, the
liquid in the tank 30 from the liquid inlet 51 provided in the lower part of the tank 30 in the
state in which the liquid exists in the tank 30 (the state in which the liquid fills at least the lower
part of the tank 30). It is possible to inject an external liquid (second suspension solution K2,
solution W) therein. Therefore, compared to a manufacturing apparatus in which the material of
the speaker diaphragm 4 is introduced from the upper side of the tank 30, it is possible to
suppress the disturbance (waving) generated on the liquid surface of the liquid in the tank 30. It
is possible to suppress the disturbance that occurs in the thickness of each layer that constitutes
Therefore, a laminated body in which the thickness of each diaphragm layer is uniform can be
obtained.
10-05-2019
21
[0073]
In addition, a liquid inlet 51 is provided in the tank main body 31 which is a wall portion of the
tank 30. Therefore, the liquid is injected into the tank main body 31 from the vicinity of the inner
peripheral surface 31 a of the tank main body 31, and the disturbance (waving) generated on the
liquid surface of the liquid in the tank 30 can be effectively suppressed. Thereby, the disturbance
produced in the thickness of each diaphragm layer which comprises the diaphragm 4 for
speakers can be suppressed further.
[0074]
In addition, the liquid inlet 51 is formed in an annular shape concentric with the tank body 31.
Therefore, it is possible to inject the liquid evenly over the circumferential direction of the tank,
and it is possible to effectively suppress the disturbance (waving) generated on the liquid surface
of the liquid in the tank. Thereby, the disorder which arises in the thickness of each layer which
constitutes a layered product can further be controlled.
[0075]
In addition, it has a net 43 provided facing the connection port 41 B as a dewatering port, and an
inclined surface portion 44 provided on the outer peripheral portion of the net 43. Therefore, the
material contained in the liquid in the tank 30 can be collected on the mesh 43 by the inclined
surface portion 44.
[0076]
In addition, a sensor 32 for detecting the level of the liquid in the tank 30 is further provided.
Therefore, the liquid level in the tank 30 can be monitored, and the liquid level in the tank 30
can be maintained properly.
[0077]
10-05-2019
22
Further, a tank body 31 which is a wall portion of the tank 30 is made of a light transmitting
material. Therefore, the liquid level can be monitored from outside the tank 30 visually or by an
optical sensor, and the liquid level in the tank 30 can be maintained appropriately.
[0078]
Although the present invention has been described above by way of the preferred embodiments,
the present invention is not limited to the configurations of the above embodiments.
[0079]
For example, in the above-described speaker diaphragm, the first diaphragm layer 4a may be a
surface layer.
Further, the speaker diaphragm 4 may have a multilayer structure of three or more layers, and in
this case, at least the third diaphragm layer 4c is provided. Also in the third diaphragm layer 4c,
when the first diaphragm layer 4a and the second diaphragm layer 4b have uniform thicknesses,
desired physical properties of the speaker diaphragm 4 can be obtained, and the acoustic
characteristics of the speaker device Can be improved and desired acoustic characteristics can be
obtained.
[0080]
Further, for example, the method of manufacturing the speaker diaphragm of the embodiment
described above is a method of manufacturing the speaker diaphragm 4 having a two-layer
structure, but is not limited thereto. It may be a method of manufacturing a speaker diaphragm
4A having a multilayer structure of three or more layers shown in FIGS. 8 (a) and 8 (b). The
speaker diaphragm 4A has a three-layer structure in which a first diaphragm layer 4d, a second
diaphragm layer 4e, and a third diaphragm layer 4f are sequentially stacked. A foam layer is
formed as the second diaphragm layer 4 e which is an intermediate layer. This foam layer is
produced by forming a micro hollow body (foam material in the form of hollow particles) having
a property of expanding by heating, and then heating and compressing.
[0081]
10-05-2019
23
A method of manufacturing the speaker diaphragm 4A having the three-layer structure will be
briefly described. (1) The suspension (first suspension) containing the material of the first
diaphragm layer 4d is injected into the tank 30. (2) In the liquid in the tank 30, water (liquid) not
containing the material of the diaphragm is injected from the liquid inlet 51. At this time, a liquid
layer consisting of water is formed on the suspended liquid layer consisting of the first
suspension liquid. (3) Suspension liquid (second suspension) containing a micro hollow body
(foam material in the form of hollow particles) having the property of being expanded by heating
as a material of the second diaphragm layer 4 e in the liquid in the tank 30 Is injected from the
liquid inlet 51. At this time, a suspension liquid layer consisting of a second suspension liquid is
formed on the liquid layer in an overlapping manner. (4) In the liquid in the tank 30, water
(liquid) not containing the material of the diaphragm is injected from the liquid inlet 51. At this
time, a liquid layer consisting of water is formed on the suspension layer consisting of the second
suspension liquid. (5) In the liquid in the tank 30, a suspension (third suspension) containing the
material of the third diaphragm layer 4f is injected. At this time, a suspension liquid layer
consisting of a third suspension liquid is formed on top of the liquid layer. Then, the liquid in the
tank 30 is discharged by dehydration performed in parallel with the injection of the liquid, and
the first diaphragm layer 4d, the second diaphragm layer 4e, and the third diaphragm layer 4f
are discharged on the mesh 43. A laminated multi-layered paper-making body is obtained. As
shown in FIG. 6, the multilayer sheet-formed body is heated and pressed by a mold 80 in
substantially the same manner as in the above embodiment to produce a speaker diaphragm 4A
having a three-layer structure as shown in FIG.
[0082]
Next, one specific example of a method of manufacturing a three-layered speaker diaphragm will
be described.
[0083]
As a material of the base material layer (the first diaphragm layer 4d), a pulp fiber prepared at
NBKP 20 ° SR as in the first embodiment is used, and a cationic sizing agent is used to further
increase the waterproofness of the pulp material. Add about 5%.
As a material of the intermediate layer (the second diaphragm layer 4e), for example, a micro
hollow body having an average particle diameter of about 20 μm and having a property of
expanding by heating is dispersed in water (liquid) to a concentration of about 1.0 g / L. A turbid
solution (second turbid solution) is prepared. As a material of the surface layer (third diaphragm
10-05-2019
24
layer 4f), a raw material in which mica powder is mixed at a ratio of 10% to the same pulp
material (90%) as the base material layer (first diaphragm layer 4d) is used. The concentration is
adjusted to about 0 g / L, and a sizing agent is similarly added to about 5% to prepare a turbid
solution (third turbid solution).
[0084]
First, the material of the base material layer and water are injected into the tank 30 to form a
turbid solution (first turbid solution). Then, water is injected from the liquid inlet 51 in the liquid
in the tank 30, and then a second turbid liquid is injected from the liquid inlet 51 in the liquid in
the tank 30. Further, water is injected from the liquid inlet 51 in the liquid in the tank 30, and
then a third turbidity liquid is injected from the liquid inlet 51 in the liquid in the tank 30. In the
papermaking section 40, the liquid in the tank 30 is dewatered in parallel with the injection of
each liquid, and a multilayer composed of the first diaphragm layer 4d, the second diaphragm
layer 4e, and the third diaphragm layer 4f on the mesh 43 A machined body is obtained. Then,
this multilayer sheet-formed body is pressed and dried in the same manner as in the first
embodiment using a mold 80 heated to about 160.degree. When heated, the micro hollow body
expands, and as shown in FIG. 8B, the speaker diaphragm 4A in which the foam layer is formed
on the second diaphragm layer 4e is completed.
[0085]
In the speaker diaphragm 4A, the material of the first diaphragm layer 4d and the material of the
second diaphragm layer 4e are intertwined at the boundary between the first diaphragm layer 4d
and the second diaphragm layer 4e. A first entangled portion 4x is formed. In addition, at the
boundary between the second diaphragm layer 4e and the third diaphragm layer 4f, the second
entangled portion 4y in which the material of the second diaphragm layer 4e and the material of
the third diaphragm layer 4f are entangled is It is formed. The thickness of the first entangled
portion 4x is smaller than the thickness of the first diaphragm layer 4d, the second diaphragm
layer 4e, or the third diaphragm layer 4f. Similarly, the thickness of the second entangled portion
4y is smaller than the thickness of the first diaphragm layer 4d, the second diaphragm layer 4e,
or the third diaphragm layer 4f.
[0086]
10-05-2019
25
Further, in the embodiment described above, the liquid inlet 51 is disposed in the lower portion
of the tank 30 and above the papermaking section 40 (specifically, the upper end 44a of the
inclined surface section 44) and directed horizontally. Although it was opened, of course, it is not
limited to this. For example, as shown in FIG. 9, the liquid inlet 51A may be disposed on the inner
peripheral surface of the tank body 31 in the circumferential direction and open downward.
Alternatively, as shown in FIG. 10, the conduit 52 may be extended to the central portion of the
tank main body 31, and the tip opening of the conduit 52 may be a liquid inlet 51B and directed
horizontally, vertically or upward. Good. That is, as long as the liquid can be injected into the
liquid in the tank 30, the opening direction of the liquid inlet 51 is not limited to the horizontal
direction, the downward direction, or the upward direction unless it is contrary to the object of
the present invention. is there.
[0087]
Further, in the above-described embodiment, the first suspension K1 corresponds to an example
of the first liquid, and the second suspension K2 corresponds to an example of the second liquid.
Here, the first liquid and the second liquid indicate that the first liquid is injected first and the
second liquid is injected after the first liquid, that is, "first", "second" And are merely indicative of
relative order relations, not absolute order relations. That is, this does not mean that the first
liquid is injected first among all the liquids, and the second liquid is injected second among all
the liquids. For example, when four kinds of liquids are sequentially injected, when focusing on
the liquid to be injected second and the liquid to be injected third, the former corresponds to an
example of the first liquid, and the latter corresponds to the example of the second liquid.
Equivalent to. Similarly, when focusing on the third injected liquid and the fourth injected liquid,
the former corresponds to an example of the first liquid, and the latter corresponds to an
example of the second liquid.
[0088]
The above-described embodiment only shows a typical form of the present invention, and the
present invention is not limited to the embodiment. That is, those skilled in the art can carry out
various modifications without departing from the gist of the present invention in accordance with
conventionally known findings. Of course, as long as the configuration of the method and
apparatus for manufacturing a laminate of the present invention is provided even by such a
modification, it is included within the scope of the present invention.
10-05-2019
26
[0089]
(Verification) The speaker diaphragms of Examples 1 and 2 and Comparative Example 1 shown
below were prepared for speaker diaphragms, and physical property values were measured and
compared for each.
[0090]
(Example 1) The speaker diaphragm of Example 1 is manufactured using the above-described
method for manufacturing a speaker diaphragm, and is a first diaphragm layer made of NBKP of
wood pulp fibers having a freeness of 20 ° SR. And a second diaphragm layer made of NBKP of
wood pulp fibers having the same freeness of 20 ° SR.
The density of the first diaphragm layer is higher than the density of the second diaphragm layer.
The first diaphragm layer and the second diaphragm layer are integrated at the boundary
portion.
[0091]
(Example 2) The speaker diaphragm of Example 2 is manufactured using the above-described
method for manufacturing a speaker diaphragm and is a first diaphragm layer made of NBKP of
wood pulp fibers having a freeness of 20 ° SR. And a second diaphragm layer made of NBKP of
wood pulp fibers having a freeness of 20 ° SR, and a fabric disposed between the first
diaphragm layer and the second diaphragm layer. ing. This woven fabric is composed of
polypropylene-based fibers. The first diaphragm layer and the fabric, and the second diaphragm
layer and the fabric are integrated at their boundary portion.
[0092]
Comparative Example 1 The speaker diaphragm of Comparative Example 1 is manufactured only
by the first diaphragm layer using the above-described method for manufacturing a speaker
diaphragm, and is made of NBKP of wood pulp fiber having a freeness of 20 ° SR. And a single
diaphragm layer.
[0093]
Table 1 shows measurement results of physical properties of the speaker diaphragms of
10-05-2019
27
Examples 1 and 2 and Comparative Example 1.
[0094]
[0095]
As apparent from the above measurement results, the Young's modulus of the speaker
diaphragm of Examples 1 and 2 is larger than the Young's modulus of the speaker diaphragm of
Comparative Example 1.
Further, the propagation speed of the speaker diaphragm of Examples 1 and 2 is higher than the
propagation speed of the speaker diaphragm of Comparative Example 1.
Further, the internal loss of the speaker diaphragm of Examples 1 and 2 is slightly smaller than
or equal to the internal loss of the speaker diaphragm of Comparative Example 1.
[0096]
In general, the Young's modulus and internal loss of the speaker diaphragm are in inverse
proportion to each other. When one of the Young's modulus and the internal loss is large, the
other is small.
However, in the speaker diaphragms of the first and second embodiments, the first diaphragm
and the second diaphragm are integrated directly or through a fabric, so that the material of the
first diaphragm and the second diaphragm can be obtained. It is considered that internal loss is
improved by the friction of the material. Further, it is considered that the internal loss is
improved because the friction is more likely to occur due to the presence of the entangled
portion at the boundary between the first diaphragm and the second diaphragm.
[0097]
10-05-2019
28
Further, since the density of the speaker diaphragms of Examples 1 and 2 is larger than the
density of the speaker diaphragm of Comparative Example 1, it is considered that the Young's
modulus of the speaker diaphragm is improved. The reason why the density of the speaker
diaphragms of the first and second embodiments is high is that the dewatering time is relatively
long, and the material is attracted to the net and the gaps in the diaphragm layer become
relatively small. On the other hand, when the density of the first diaphragm layer is high, the
material of the second diaphragm layer is less likely to enter the inside of the first diaphragm
layer, so a predetermined thickness or uniform on the first diaphragm layer It is contemplated
that a second diaphragm layer can be formed having a thickness.
[0098]
In the speaker diaphragms of Examples 1 and 2, the first diaphragm layer and the second
diaphragm layer are integrated, and it is difficult to separate the first diaphragm and the second
diaphragm. , Had high peel strength.
[0099]
In the speaker diaphragms of the first and second embodiments, there is an entangled portion at
the boundary between the first diaphragm layer and the second diaphragm.
In the entangled portion, the fibers of the first diaphragm layer and the fibers of the second
diaphragm layer are entangled. For this reason, the fibers in the entangled portion penetrate
from the first diaphragm layer toward the second diaphragm layer when the first diaphragm
layer and the second diaphragm layer are formed in this order, and the second diaphragm layer
is formed. In the case where the first diaphragm layer is formed in order, the second diaphragm
layer may intrude toward the first diaphragm layer. Also, the fibers in the layers other than the
entangled portion are deposited along the front surface or the back surface or the boundary of
the speaker diaphragm. Therefore, the direction in which the fibers are deposited in the
entangled portion may be different from the direction in which the fibers are deposited in other
portions than the entangled portion. The entangled portion may be formed over the entire
boundary between the first diaphragm layer and the second diaphragm, or may be formed only
at a predetermined position on the boundary.
[0100]
10-05-2019
29
The difference between the speaker diaphragms of the first and second embodiments and the
comparative example is that there is a boundary portion, that there is an entangled portion, that
the fiber accumulation direction in the entangled portion is different, and others If the density of
the first diaphragm layer is larger than the density of the second diaphragm layer, or if the
density of the first diaphragm layer is greater than the density of the second diaphragm layer, or
if When the sheet is formed in order, the density of the second diaphragm layer may be higher
than the density of the first diaphragm layer. For this reason, there may be a difference that the
density of the entire nest speaker diaphragm is larger in the first and second embodiments than
in the comparative example. Further, since there is a difference in density, the Young's modulus
and the propagation speed of the speaker diaphragm may be larger in the first and second
embodiments than in the comparative example. Although Examples 1 and 2 and the comparative
example described above have been described, in the present embodiment, it is sufficient to have
at least one of these differences, and there is no limitation to having all the differences.
[0101]
4, 4A Speaker diaphragm (an example of a laminate) 4a1, 4b1 Material (an example of a
material) 4a, 4d first diaphragm layer 4b, 4e second diaphragm layer 4f third diaphragm layer 4x
first interlacing portion 4y Second entangled portion 4z entangled portion 10 speaker device 20
manufacturing device for loudspeaker diaphragm (an example of laminate manufacturing device)
30 tank 31 tank main body (an example of wall portion) 32 sensor (an example of liquid level
detection device) 40 paper forming portion 41 mounting portion 41B connection port (an
example of a dewatering port) 42 mold 43 mesh 44 inclined surface 50 liquid injection portion
51, 51A, 51B liquid injection port 52 conduit 61 dewatering device 62 liquid injection device 70
control device K1 first suspension (One example of the first liquid) K2 Second suspension (one
example of the second liquid) W water (one example of the liquid)
10-05-2019
30
Документ
Категория
Без категории
Просмотров
0
Размер файла
46 Кб
Теги
jpwo2014132392
1/--страниц
Пожаловаться на содержимое документа