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The present invention relates to a speaker diaphragm that is formed by using inorganic fibers,
and a method of manufacturing the same. The conventional papermaking cone lacks heat
resistance and moisture resistance and has limitations in strength, and the regeneration zone
does not extend. A first object of the present invention is to provide a speaker diaphragm having
characteristics required for the diaphragm by paper-forming using inorganic fibers as a raw
material, and another object of the present invention is to provide the same. It is an object of the
present invention to provide a method of manufacturing a diaphragm for forming a diaphragm
by paper forming. An embodiment of the present invention will be described based on the
drawings. For convenience, it will be described together with the apparatus used to implement
the method of manufacturing the speaker diaphragm. In the figure, it is a papermaking machine,
and a predetermined shape to be machined, for example, a cone-shaped paper mesh 2 is set. てい
る。 Into the sandbar 3 inorganic synthetic fibers, for example, carbon fibers, glass fibers etc. 4
are dispersed uniformly using surfactant sound and zirconia colloid is mixed as a binder 5 in tL.
As the binder 5, zirconia colloid and a water-soluble thermosetting resin can be used in common.
In this case, the ratio is 1: 0.5-4. In addition, whiskers such as silicon nitride whiskers can be
used together with inorganic fibers as a reinforcing material to enhance the entire strength of the
moving plate, in which case the reinforcing material is 5 to 2 ° relative to the fiber 100 For
example, heat distortion is carried out at 150 to 160 ° C. by means of heat fL ′ apparatus 7, 7
′ as shown in FIG. 2 to evaporate the moisture of the fiber. Let The original diaphragm which
has been dried is stored in a heating furnace 8 as shown in FIG. 3 and heat cured at about 300 °
C. to obtain a speaker diaphragm 9. FIGS. 4 and 5 are enlarged cross-sectional views of the
speaker diaphragm manufactured according to the above process, and FIG. 4 is a cross-sectional
view in the case where no reinforcing material is mixed, and FIG. It is a cross-sectional view at the
time of mixing the material 10, Comprising: The reinforcing material 10 is disperse-bound
between fibers. In addition, you may form coating layer 11t- by applying by epoxy resin 會 on the
diaphragm surface. By this coating layer, the hardness can be further enhanced and the lack of
air tightness due to pin holes or the like existing in the diaphragm main body can be improved. In
addition, 1 strength has been significantly enhanced and is suitable as a large diameter woofer
cone. According to the speaker diaphragm of the present invention, since the raw material is an
inorganic fiber and is formed by papermaking, its strength, heat resistance, propagation speed,
etc. can be remarkably improved as compared with the conventional papermaking cone. In
addition, since the setting of the elastic modulus is easy to answer, it is possible to make the
diaphragm characteristically superior.
Further, since the manufacturing method is papermaking, the conventional paper making
apparatus can be used as it is, of course, fibers can be uniformly dispersed and bonded, and it is
particularly suitable as a woofer diaphragm or the like.
Brief description of the drawings
1 to 3 show an example of an apparatus used for carrying out the method for producing a
speaker diaphragm according to the present invention, FIG. 1 is a schematic side view of sand
tank, and FIG. 2 is a heat press apparatus. Cross section, #!
3 is a schematic perspective view of the heating furnace, and FIG. 4 is an enlarged cross-sectional
view of the speaker diaphragm according to the present invention. 1: Sand tank 2: Paper mesh 3:
Sand field 4: Inorganic fiber 5: Binder 6: Vibrator original form 7 ° 7 ': Heat press device 8:
Heating furnace 9: Speaker diaphragm 10: Reinforcement 11: Coating layer. Patent applicant Trio
Inc. correction of procedure August 16, 1977 Secretary General of Patent Office Kazuo Wakasugi
1 Display of small works 1982 Patent No. 112,475 No. 2, name of the invention Speaker
diaphragm and its manufacturing method 3 Correction Relationship with small person f1 Patent
applicant (1 place, Shibuya-ku, Tokyo 2 17-5, Shibuya-ku, Tokyo Name (name) (359)) Rio Co.,
Ltd. representative Ishizaka-Yoshi 4, assistant 代 1056h11 Number 7 of the invention, the
column of Detailed description of the invention in the specification of correction, and the
contents of correction of correction contents (1) Description of page 3; Correct "Exit 5" as "Exit
2". (2) Correct 9 in Figure 1 attached separately. Amendment of the Procedure Patent Secretary
Kazuo Wakasugi No. 1 Small b) Indication of f) + 57: + ′ ′ Patent ρf1 11247552, Title of the
Invention Loudspeaker diaphragm and its manufacturing method 3 with 41 corrections
Relationship 11: 11'li, Shibuya-ku, Tokyo, Shibuya-ku, Shibuya 2-chome 171r'5 4, agent 代 1056
Number of inventions increased by correction, number 7 of object object of correction The
contents of the amendments: II + 196, Supplement II: The contents of the attached sheet (+) Next
to the "patent application" of the application form Join "(patent application under Article 38
proviso to Patent Act)". (2) A field is added next to the column of rl of application, title of
invention and 2, Number of invention described in claims is added. (3) Number of terms in
the m-book (7) r2. Jr31r4. Jr5. "Each r3. Jr4. Jr5. Jr6. And correct.