JPS5225617A - Equipment and molding method of metal cone for speakers - Google Patents

Equipment and molding method of metal cone for speakers

Info

Publication number
JPS5225617A
JPS5225617A JP50101226A JP10122675A JPS5225617A JP S5225617 A JPS5225617 A JP S5225617A JP 50101226 A JP50101226 A JP 50101226A JP 10122675 A JP10122675 A JP 10122675A JP S5225617 A JPS5225617 A JP S5225617A
Authority
JP
Japan
Prior art keywords
speakers
equipment
molding method
metal cone
cone
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
JP50101226A
Other languages
Japanese (ja)
Inventor
Hiroshi Asao
Osami Kaneto
Nagashige Seyama
Mitsunari Kamata
Masaru Kobayashi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP50101226A priority Critical patent/JPS5225617A/en
Publication of JPS5225617A publication Critical patent/JPS5225617A/en
Pending 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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension

Abstract

PURPOSE:By molding cone material with fluid pressure in a temperature near recystalization and using an air tight die that can be pre-heated, to decrease the number of processes and enable high productivity.
JP50101226A 1975-08-22 1975-08-22 Equipment and molding method of metal cone for speakers Pending JPS5225617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50101226A JPS5225617A (en) 1975-08-22 1975-08-22 Equipment and molding method of metal cone for speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50101226A JPS5225617A (en) 1975-08-22 1975-08-22 Equipment and molding method of metal cone for speakers

Publications (1)

Publication Number Publication Date
JPS5225617A true JPS5225617A (en) 1977-02-25

Family

ID=14294973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50101226A Pending JPS5225617A (en) 1975-08-22 1975-08-22 Equipment and molding method of metal cone for speakers

Country Status (1)

Country Link
JP (1) JPS5225617A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277045A (en) * 1992-05-08 1994-01-11 Rockwell International Corp. Superplastic forming of metals at temperatures greater than 1000 degree C

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277045A (en) * 1992-05-08 1994-01-11 Rockwell International Corp. Superplastic forming of metals at temperatures greater than 1000 degree C

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