JPS55118840A - Foam molding die - Google Patents

Foam molding die

Info

Publication number
JPS55118840A
JPS55118840A JP2513179A JP2513179A JPS55118840A JP S55118840 A JPS55118840 A JP S55118840A JP 2513179 A JP2513179 A JP 2513179A JP 2513179 A JP2513179 A JP 2513179A JP S55118840 A JPS55118840 A JP S55118840A
Authority
JP
Japan
Prior art keywords
vent
die
small diameter
foamed
foamed material
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
JP2513179A
Other languages
Japanese (ja)
Inventor
Hisao Inage
Yoshie Kodera
Masayuki Takano
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 JP2513179A priority Critical patent/JPS55118840A/en
Publication of JPS55118840A publication Critical patent/JPS55118840A/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
    • B29C44/58—Moulds
    • B29C44/588—Moulds with means for venting, e.g. releasing foaming gas

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To reduce material loss by minimizing the foamig material leaked from a vent and by facilitating a post treatment of the foamed material by providing with a vent wherein the cavity side has a small diameter. CONSTITUTION:A gas vent 1 is provided for removing the gas retained in the cavity of the foamed molding die comprising the upper die 2 and the lower die 3. Then, the cross section of the vent 1 allows to make smaller diameter at the cavity side to define a reversed cone shape, the point 6 of a small diameter side forming an acute angle edge with 0.1-3mm diameter normally. When the die 2 and the die 3 are opened after foaming molding, the molded article 4 and the foamed material 7 are cut smoothly at the small diameter edge 6 of the vent hole 1, allowing to prevent the vent from getting blocked, which facilitates to remove the foamed material.
JP2513179A 1979-03-06 1979-03-06 Foam molding die Pending JPS55118840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2513179A JPS55118840A (en) 1979-03-06 1979-03-06 Foam molding die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2513179A JPS55118840A (en) 1979-03-06 1979-03-06 Foam molding die

Publications (1)

Publication Number Publication Date
JPS55118840A true JPS55118840A (en) 1980-09-12

Family

ID=12157398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2513179A Pending JPS55118840A (en) 1979-03-06 1979-03-06 Foam molding die

Country Status (1)

Country Link
JP (1) JPS55118840A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57167227A (en) * 1981-04-09 1982-10-15 Sanyo Electric Co Ltd Manufacture of heat-insulating box
JPS6058307U (en) * 1983-09-28 1985-04-23 豊田合成株式会社 Urethane steering wheel mold

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230977A (en) * 1975-09-04 1977-03-09 Kanagawa Kiki Kogyo Kk Fuel oil filtrating equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230977A (en) * 1975-09-04 1977-03-09 Kanagawa Kiki Kogyo Kk Fuel oil filtrating equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57167227A (en) * 1981-04-09 1982-10-15 Sanyo Electric Co Ltd Manufacture of heat-insulating box
JPH035969B2 (en) * 1981-04-09 1991-01-28 Sanyo Electric Co
JPS6058307U (en) * 1983-09-28 1985-04-23 豊田合成株式会社 Urethane steering wheel mold

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