JPS57208224A - Foaming method of resin - Google Patents

Foaming method of resin

Info

Publication number
JPS57208224A
JPS57208224A JP56093881A JP9388181A JPS57208224A JP S57208224 A JPS57208224 A JP S57208224A JP 56093881 A JP56093881 A JP 56093881A JP 9388181 A JP9388181 A JP 9388181A JP S57208224 A JPS57208224 A JP S57208224A
Authority
JP
Japan
Prior art keywords
resin
net
outside
vibrating plate
foaming
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
JP56093881A
Other languages
Japanese (ja)
Inventor
Shinichiro Kawamura
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 JP56093881A priority Critical patent/JPS57208224A/en
Publication of JPS57208224A publication Critical patent/JPS57208224A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B29C44/5654—Subdividing foamed articles to obtain particular surface properties, e.g. on multiple modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape

Abstract

PURPOSE:To make foaming of a base part of a foamed object uniform under the condition of free foaming, by providing a lattice etc. so as to cover an entire or more than half part of expanding directions when a resin foams and making the resin to foam directing from its inside to an outside. CONSTITUTION:In order to fill e.g. an inside part of a vibrating plate 1 of a cone type speaker with a resin 4 and to foam it, after an entire part or more than half part of expanding directions from a shaped or flat base in foaming of the resin 4 being covered by a flat or shaped lattice or net 3, the resin 4 is foamed from its inside to an outside. Then, the resin 4 is cut between the net 3 and an opening part of the vibrating plate 1 after the resin solidifies and an excess 5 of the resin is removed and an inside part surrounded by the vibrating plate 1 and the net 3 is used. EFFECT:Effect of contraction of resins inside and outside of a lattice etc. is small. USE:A cone type speaker.
JP56093881A 1981-06-19 1981-06-19 Foaming method of resin Pending JPS57208224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56093881A JPS57208224A (en) 1981-06-19 1981-06-19 Foaming method of resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56093881A JPS57208224A (en) 1981-06-19 1981-06-19 Foaming method of resin

Publications (1)

Publication Number Publication Date
JPS57208224A true JPS57208224A (en) 1982-12-21

Family

ID=14094813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56093881A Pending JPS57208224A (en) 1981-06-19 1981-06-19 Foaming method of resin

Country Status (1)

Country Link
JP (1) JPS57208224A (en)

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