JPS5540761A - Molding material - Google Patents

Molding material

Info

Publication number
JPS5540761A
JPS5540761A JP6495179A JP6495179A JPS5540761A JP S5540761 A JPS5540761 A JP S5540761A JP 6495179 A JP6495179 A JP 6495179A JP 6495179 A JP6495179 A JP 6495179A JP S5540761 A JPS5540761 A JP S5540761A
Authority
JP
Japan
Prior art keywords
pitch
graphite powder
molding material
kneaded
argon
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.)
Pending
Application number
JP6495179A
Other languages
Japanese (ja)
Inventor
Nobuhiro Tsukagoshi
Teruo Toma
Shinichi Yokozeki
Toshikazu Yoshino
Yasuyuki Arai
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 JP6495179A priority Critical patent/JPS5540761A/en
Publication of JPS5540761A publication Critical patent/JPS5540761A/en
Pending legal-status Critical Current

Links

Landscapes

  • Working-Up Tar And Pitch (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE: After petroleum pitch as asphalten, is dry distilled under nonoxidative atmosphere as argon, the residue is kneaded with a graphite powder to produce said molding material suitably used for vibration plates in audio system as speaker because of its high lightness and stiffness.
CONSTITUTION: A pitch as petroleum or coal tar pitch, is dry distilled by heating at 350W400°C under a nonoxidative atmosphere as argon and the residual pitch is kneaded with a graphite powder of 0.1W50 micron particle sizes at 200°C using a kneader to produce the objective molding material. The amount of the graphite powder added is preferably 40W70wt%.
EFFECT: When vibration plates are made from the material, sounds are precisely reproduced over a wide zone of frequency.
COPYRIGHT: (C)1980,JPO&Japio
JP6495179A 1979-05-28 1979-05-28 Molding material Pending JPS5540761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6495179A JPS5540761A (en) 1979-05-28 1979-05-28 Molding material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6495179A JPS5540761A (en) 1979-05-28 1979-05-28 Molding material

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2548678A Division JPS54118820A (en) 1978-03-08 1978-03-08 Method of fabricating acoustic vibrating plate

Publications (1)

Publication Number Publication Date
JPS5540761A true JPS5540761A (en) 1980-03-22

Family

ID=13272844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6495179A Pending JPS5540761A (en) 1979-05-28 1979-05-28 Molding material

Country Status (1)

Country Link
JP (1) JPS5540761A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59130082U (en) * 1983-02-21 1984-08-31 清水　信行 pressure fluid power equipment
JPS60224983A (en) * 1984-04-24 1985-11-09 Konan Denki Kk Reciprocating pump utilizing pressure fluid
JPH0191079U (en) * 1987-12-04 1989-06-15
US5002468A (en) * 1987-05-28 1991-03-26 Yamada Yuki Seizo Co., Ltd. Switching device for reciprocating pumps

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5325486A (en) * 1976-07-21 1978-03-09 Commissariat Energie Atomique Ultrasonic inspecting device for tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5325486A (en) * 1976-07-21 1978-03-09 Commissariat Energie Atomique Ultrasonic inspecting device for tube

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59130082U (en) * 1983-02-21 1984-08-31 清水　信行 pressure fluid power equipment
JPH0115922Y2 (en) * 1983-02-21 1989-05-11
JPS60224983A (en) * 1984-04-24 1985-11-09 Konan Denki Kk Reciprocating pump utilizing pressure fluid
US5002468A (en) * 1987-05-28 1991-03-26 Yamada Yuki Seizo Co., Ltd. Switching device for reciprocating pumps
JPH0191079U (en) * 1987-12-04 1989-06-15

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