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JPS62132495

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DESCRIPTION JPS62132495
[0001]
The invention relates to a method of manufacturing a multilayer diaphragm used as a
loudspeaker diaphragm. (Conventional technology) A speaker I & VJ board has been made
smaller and smaller. "To increase C sound velocity and maintain 1-minute rigidity, it is made of
carbon black [-L boxyxi-1]. (1) Multilayers formed by stacking and fixing on a diaphragm of a
vibrating plate which is formed into a predetermined shape by l'i 'cleaning of fibers such as
valves and ceramic fibers etc. A diaphragm of construction is known. (Problems to be solved)
However, the diaphragm of the above-described multilayer structure is in the form of a prepreg
reinforced with carbon cloth] -Bonito sheet (hereinafter referred to as 1-preg in the form of
prepreg 1 Let's say that the prepreg with brackets 41 after foxy -1- is f 'added! J3 heat-formed in
advance into a shape corresponding to the shape of JI + Fi, J3 and the diaphragm consisting of
this 1 boxy -1 иии valve, a valve such as a Hylamic ? phase, etc. A method was used in which a
sheet was laminated and fixed using a thermoplastic film, or LL, or an adhesive. In this method,
the adhesive force is not uniform and sufficient contact force is 151, mechanical strength I had
the problem that 1a was also weak. Therefore, according to the present invention, a
thermoplastic film is attached 1 to a swing J temporary 1 obtained by forming 4 Ml 1 l into a
predetermined shape, and the eboxy 1 to 1 (prepreg) reinforced with carbon 1 Furthermore, it
has strong adhesive strength and strong mechanical strength by compression molding to a shape
corresponding to the diaphragm while heating V1 sheet and this epoxy resin 1 (prepreg), and
?when the speed of sound is 1 q The purpose is to provide a manufacturing method of a
multilayer diaphragm in which a multilayer diaphragm fl J temporary is superior to Jt. The
present invention provides a method of manufacturing a multilayer diaphragm as shown in the
drawings in order to solve the above-mentioned problems. In the method shown in the figure, the
thermal O plastic film 1 is attached to the vibration IN 21 obtained by forming the JJA sheet into
a predetermined shape, and the thermoplastic diaphragm 11- After placing a carbon cloth-
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reinforced {circle over (1)} {circle over (1)} {circle over (1)} {circle over (1)} (prepreg) 3 while
compression heating this Y-layer sheet (prepreg) 3 into a shape corresponding to the shape of
diaphragm 2 1. -Q (Examples) Figures (?) to (C) (A diagram illustrating a method of
manufacturing a multi-layer diaphragm according to the present invention.
When manufacturing a multi-layered diaphragm, as shown in Fig. (A), the thermoplastic film 1 is
formed on a sheet of paper sheet 20P in which fibers such as pulp and ceramic fiber set are
made into paper and IC and the like are formed into a predetermined shape. Next, as shown in
Fig. (B), an epoxy sheet (prepreg) 3 reinforced with a carbon cloth is necked with a thermoplastic
resin film 1 and compressed while heating using a forming apparatus 4 as shown in Fig. (B) Form
The forming apparatus 1 includes a heating element such as a heater inside as shown in FIG. (B)
(see J, and is made of soil FI 24 F 3 and lower 'vl / Ib in a shape corresponding to the shape of
the diaphragm 2 / L'rJ] When molded, it is built in the upper mold 4a and the upper mold 4b and
is configured to have a heating element t, L that generates heat J: 1 The thermoplastic film 1 and
the diaphragm 2 are compression-molded because they are not heated, and then cold 7J1 as
shown in Fig. (C) 1'J, an epoxy sheet (prepreg) 3, a thermoplastic film 1, A multilayer diaphragm
5 in which the diaphragms 2 are laminated and fixed is formed. The multi-layered diaphragm 5t
thus formed is melted with the diaphragm made of the 1 peristaltic plate 2 and the epoxy sheet 3
and the thermoplastic film 1 is melted, and the vibration made of the 1?4 square sheet 3 due to
the cold W of the compression forming attack. Since the plate and the diaphragm 2 are firmly
fixed together by firmly bonding them together, the 184 strength of the multi-layer 1 swinging
movement produced by using the conventional manufacturing method 1J method is 2 to 31 and
11 strength, Also, the bridge mechanical strength of the multilayer diaphragm 5 is changed; In
addition, the thermoplastic film 1 connected to the negative 1 is modified by the adhesive
strength between the diaphragm 1 and the iridescent provisional made of evo: 1 shishi-1 и 3 and
the 'C reinforcement, the vibration 1l IJJ 2 Form a film on top of it to soften it and prevent it from
penetrating to the diaphragm 2 because it is 1-1 L 'U. The decrease in the number of one-n-one
resin is prevented, and the surface gloss of the multilayer diaphragm 5 is not reduced. (Effect of
the invention! 2) Since the present invention has the length of 1 / J method 'C described above,
strong tangent 6 strength and strong mechanical strength are 1! 7 and J: =) 1 minute fast 1! (1)
You will be immersed in a joint stock company, and the epoxy resin will not penetrate the
diaphragm and you will have the advantage of not having the surface gloss of one member.
[0002]
Brief description of the drawings
[0003]
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Figures (A) to (C) are diagrams for explaining the manufacturing method 1J of the multilayer
diaphragm according to the present invention.
DESCRIPTION OF SYMBOLS 1: .. Thermoplastic film, 2 ... diaphragm, 3 ... epoxy sheet (prepreg) 4
... molding vi placement 4a. и и Multilayer diaphragm. Procedure Amendment (Method) 1. Display
1 of 1 1 Showa 60 'IT Special Application No. 272,767, 32 Multilayer diaphragm manufacturing
method 3, Relationship with person making correction Patent applicant's address Kanagawa
Prefecture Yokohama City Jinna Ward Mamoru 1 Macho 3-chome 12 address 4, date of
correction instruction 11111161 February 258 <R, sending El) 5, target drawing of correction
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