JPS5225618A - Equipmen and molding method of metal cone for speakers - Google Patents

Equipmen and molding method of metal cone for speakers

Info

Publication number
JPS5225618A
JPS5225618A JP10124775A JP10124775A JPS5225618A JP S5225618 A JPS5225618 A JP S5225618A JP 10124775 A JP10124775 A JP 10124775A JP 10124775 A JP10124775 A JP 10124775A JP S5225618 A JPS5225618 A JP S5225618A
Authority
JP
Japan
Prior art keywords
equipmen
speakers
molding method
metal cone
molding
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
JP10124775A
Other languages
Japanese (ja)
Inventor
Osami Kaneto
Hiroshi Asao
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 JP10124775A priority Critical patent/JPS5225618A/en
Publication of JPS5225618A publication Critical patent/JPS5225618A/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; ELECTRIC HEARING AIDS; 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

Landscapes

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

Abstract

PURPOSE:By using a die with air hole, pre-pressure chamber, air tight packing, etc. and molding with fluid pressure, for safe and high production of good products of uniform quality.
JP10124775A 1975-08-22 1975-08-22 Equipmen and molding method of metal cone for speakers Pending JPS5225618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10124775A JPS5225618A (en) 1975-08-22 1975-08-22 Equipmen and molding method of metal cone for speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10124775A JPS5225618A (en) 1975-08-22 1975-08-22 Equipmen and molding method of metal cone for speakers

Publications (1)

Publication Number Publication Date
JPS5225618A true JPS5225618A (en) 1977-02-25

Family

ID=14295564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10124775A Pending JPS5225618A (en) 1975-08-22 1975-08-22 Equipmen and molding method of metal cone for speakers

Country Status (1)

Country Link
JP (1) JPS5225618A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820027A (en) * 1956-06-08 1959-09-16 Radiation Ltd Means for shaping sheet metal articles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820027A (en) * 1956-06-08 1959-09-16 Radiation Ltd Means for shaping sheet metal articles

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