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JPS574743A - Method of molding foamed resin component - Google Patents

Method of molding foamed resin component

Info

Publication number
JPS574743A
JPS574743A JP7781580A JP7781580A JPS574743A JP S574743 A JPS574743 A JP S574743A JP 7781580 A JP7781580 A JP 7781580A JP 7781580 A JP7781580 A JP 7781580A JP S574743 A JPS574743 A JP S574743A
Authority
JP
Japan
Prior art keywords
resin
valve
shut
foamable
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
JP7781580A
Other languages
Japanese (ja)
Inventor
Hideki Asano
Tsuneo Narisawa
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 JP7781580A priority Critical patent/JPS574743A/en
Publication of JPS574743A publication Critical patent/JPS574743A/en
Pending legal-status Critical Current

Links

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To mold a component having smooth surfaces and excellent in the strength within a shortened molding cycle period, by injection molding of resins with the foamable resin being in a state coated with the other resin that cannot be foamed any more.
CONSTITUTION: An ON-OFF valve 3 is provided to a vent hole 2 of a vent type injection molding apparatus having a shut-off valve 1, a foamable resin is fed, the ON-OFF valve 3 is opened with the shut-off valve 1 closed to discharge the gas generated by the foaming of the resin through the vent hole 2, and the resin is delivered into a resin reservoir 4, the resin thereof cannot be formed any more. Subsequently, when the ON-OFF valve 3 is closed, and a foamable resin is delivered into the former resin, the foamable resin 13 is coated with the former resin 14 in the resin reservoir 4. Then, the shut-off valve is opened, and the resins are injected into molds 5 to effect the molding. Thus, the foamed resin component having a smooth surface layer is produced without increasing the period of molding cycle.
COPYRIGHT: (C)1982,JPO&Japio
JP7781580A 1980-06-11 1980-06-11 Method of molding foamed resin component Pending JPS574743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7781580A JPS574743A (en) 1980-06-11 1980-06-11 Method of molding foamed resin component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7781580A JPS574743A (en) 1980-06-11 1980-06-11 Method of molding foamed resin component

Publications (1)

Publication Number Publication Date
JPS574743A true JPS574743A (en) 1982-01-11

Family

ID=13644515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7781580A Pending JPS574743A (en) 1980-06-11 1980-06-11 Method of molding foamed resin component

Country Status (1)

Country Link
JP (1) JPS574743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020199693A (en) * 2019-06-10 2020-12-17 マツダ株式会社 Molding method of foam resin molding and molding apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020199693A (en) * 2019-06-10 2020-12-17 マツダ株式会社 Molding method of foam resin molding and molding apparatus

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