JPS54130017A - Production of diaphragm for speakers - Google Patents

Production of diaphragm for speakers

Info

Publication number
JPS54130017A
JPS54130017A JP3630478A JP3630478A JPS54130017A JP S54130017 A JPS54130017 A JP S54130017A JP 3630478 A JP3630478 A JP 3630478A JP 3630478 A JP3630478 A JP 3630478A JP S54130017 A JPS54130017 A JP S54130017A
Authority
JP
Japan
Prior art keywords
diaphragm
fabrics
phenols
speakers
phenolic
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
JP3630478A
Other languages
Japanese (ja)
Other versions
JPS5731356B2 (en
Inventor
Kazuro Okuzawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3630478A priority Critical patent/JPS54130017A/en
Publication of JPS54130017A publication Critical patent/JPS54130017A/en
Publication of JPS5731356B2 publication Critical patent/JPS5731356B2/ja
Granted 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 produce a diaphragm for speakers which is light in weight, is highly rigid and is superior in moldability by firing the base material composed of fabrics of phenolic fibers impregnated with phenolic resins in an inert atmosphere thereby carbonizing the same. CONSTITUTION:The fabrics (non-woven fabrics) 1 of the phenolic fibers formed by the novolak resin obtained through condensation polymerization of modified phenols such as phenols, cresols, fluorophenols or other and aldehydes are used as a base material and are then impregnated wth phenolic resins 2 composed of modified phenols such as phenols, cresols, fluorophenols, etc. After the fabrics are thermoformed to a diaphragm shape, they are fired at temperature above 700 deg.C in an inert atmosphere to be thereby carbonized. Further a layer of boron or beryllium is laminated on the surface of the diaphragm for speakers produced in this way, whereby the rigidity of the diaphragm may be enhanced.
JP3630478A 1978-03-28 1978-03-28 Production of diaphragm for speakers Granted JPS54130017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3630478A JPS54130017A (en) 1978-03-28 1978-03-28 Production of diaphragm for speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3630478A JPS54130017A (en) 1978-03-28 1978-03-28 Production of diaphragm for speakers

Publications (2)

Publication Number Publication Date
JPS54130017A true JPS54130017A (en) 1979-10-09
JPS5731356B2 JPS5731356B2 (en) 1982-07-03

Family

ID=12466078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3630478A Granted JPS54130017A (en) 1978-03-28 1978-03-28 Production of diaphragm for speakers

Country Status (1)

Country Link
JP (1) JPS54130017A (en)

Also Published As

Publication number Publication date
JPS5731356B2 (en) 1982-07-03

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