JPS5540761A - Molding material - Google Patents
Molding materialInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5325486A (en) * | 1976-07-21 | 1978-03-09 | Commissariat Energie Atomique | Ultrasonic inspecting device for tube |
-
1979
- 1979-05-28 JP JP6495179A patent/JPS5540761A/en active Pending
Patent Citations (1)
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)
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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