JPS56168494A - Production of diaphragm for audio equipment - Google Patents

Production of diaphragm for audio equipment

Info

Publication number
JPS56168494A
JPS56168494A JP18541180A JP18541180A JPS56168494A JP S56168494 A JPS56168494 A JP S56168494A JP 18541180 A JP18541180 A JP 18541180A JP 18541180 A JP18541180 A JP 18541180A JP S56168494 A JPS56168494 A JP S56168494A
Authority
JP
Japan
Prior art keywords
mold frame
malformation
diaphragm
production
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP18541180A
Other languages
Japanese (ja)
Other versions
JPS6057280B2 (en
Inventor
Nobuhiro Tsukagoshi
Teruo Toma
Shinichi Yokozeki
Toshikazu Yoshino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP55185411A priority Critical patent/JPS6057280B2/en
Publication of JPS56168494A publication Critical patent/JPS56168494A/en
Publication of JPS6057280B2 publication Critical patent/JPS6057280B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To prevent a malformation of material and elevate a heat treating temperature, by kneading a carbon powder and a thermoplastic or thermosetting synthetic resin into a desired form and then carbonizing or graphitizing the kneaded material through a heating and burnigng process. CONSTITUTION:About 20pts. graphite powder, about 30pts vinyl chloride resin, about 10pts. plasticizer and about 50pts. solvent are mixed and kneaded together and then formed into the desired shape of a speaker diaphragm by a mold frame. This formed product is put into a heating oven while being held by the mold frame so as to avoid a malformation due to the softening and heated gradually for about 8 hours up to about 300 deg.C from a room temperature. Then a burning process of about an hour is given at about 1,000 deg.C in a nonoxidizing atmosphere if argon, nitrogen or the like in order to ensure a carbonization.
JP55185411A 1980-12-29 1980-12-29 Manufacturing method of diaphragm for audio equipment Expired JPS6057280B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55185411A JPS6057280B2 (en) 1980-12-29 1980-12-29 Manufacturing method of diaphragm for audio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55185411A JPS6057280B2 (en) 1980-12-29 1980-12-29 Manufacturing method of diaphragm for audio equipment

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP18541080A Division JPS56103244A (en) 1980-12-29 1980-12-29 Molding material

Publications (2)

Publication Number Publication Date
JPS56168494A true JPS56168494A (en) 1981-12-24
JPS6057280B2 JPS6057280B2 (en) 1985-12-13

Family

ID=16170312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55185411A Expired JPS6057280B2 (en) 1980-12-29 1980-12-29 Manufacturing method of diaphragm for audio equipment

Country Status (1)

Country Link
JP (1) JPS6057280B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61236298A (en) * 1985-04-12 1986-10-21 Mitsubishi Pencil Co Ltd Manufacture of diaphragm for completely carbonaceous acoustic equipment
JPS61237598A (en) * 1985-04-15 1986-10-22 Mitsubishi Pencil Co Ltd Production of diaphragm of acoustic apparatus
US4855093A (en) * 1987-01-09 1989-08-08 Mitsubishi Pencil Co., Ltd. Process of making a diaphragm of carbonaceous materials for a speaker
US4896955A (en) * 1983-12-06 1990-01-30 Cvi/Beta Ventures, Inc. Eyeglass frame including shape-memory elements

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454621A (en) * 1977-10-11 1979-05-01 Matsushita Electric Ind Co Ltd Diaphragm for acoustic apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454621A (en) * 1977-10-11 1979-05-01 Matsushita Electric Ind Co Ltd Diaphragm for acoustic apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896955A (en) * 1983-12-06 1990-01-30 Cvi/Beta Ventures, Inc. Eyeglass frame including shape-memory elements
JPS61236298A (en) * 1985-04-12 1986-10-21 Mitsubishi Pencil Co Ltd Manufacture of diaphragm for completely carbonaceous acoustic equipment
JPS61237598A (en) * 1985-04-15 1986-10-22 Mitsubishi Pencil Co Ltd Production of diaphragm of acoustic apparatus
US4855093A (en) * 1987-01-09 1989-08-08 Mitsubishi Pencil Co., Ltd. Process of making a diaphragm of carbonaceous materials for a speaker
FR2627928A1 (en) * 1987-01-09 1989-09-01 Mitsubishi Pencil Co PROCESS FOR PRODUCING A SPEAKER MEMBRANE OF TOTALLY CARBONIC MATERIALS

Also Published As

Publication number Publication date
JPS6057280B2 (en) 1985-12-13

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