JPS5693522A - No-cracking mold and molding method thereof - Google Patents

No-cracking mold and molding method thereof

Info

Publication number
JPS5693522A
JPS5693522A JP17190379A JP17190379A JPS5693522A JP S5693522 A JPS5693522 A JP S5693522A JP 17190379 A JP17190379 A JP 17190379A JP 17190379 A JP17190379 A JP 17190379A JP S5693522 A JPS5693522 A JP S5693522A
Authority
JP
Japan
Prior art keywords
moving
air
die
dies
fixed
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
JP17190379A
Other languages
Japanese (ja)
Other versions
JPH0344898B2 (en
Inventor
Akio Takahashi
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.)
Kanegafuchi Chemical Industry Co Ltd
Original Assignee
Kanegafuchi Chemical Industry 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 Kanegafuchi Chemical Industry Co Ltd filed Critical Kanegafuchi Chemical Industry Co Ltd
Priority to JP17190379A priority Critical patent/JPS5693522A/en
Publication of JPS5693522A publication Critical patent/JPS5693522A/en
Publication of JPH0344898B2 publication Critical patent/JPH0344898B2/ja
Granted 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads

Landscapes

  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

PURPOSE:To eliminate the difference in distribution of specific gravity of a molded article by closing the mold and filling the same with preliminarily foamed resin, while exhausting air inside a cavity. CONSTITUTION:An exhausting device is fitted to either a fixed die or a moving- side die out of the molding dies for foamed thermoplastic resin and, while exhausting air in the state that both dies are closed, the preliminarily foamed thermoplastic resin is filled up uniformly in the dies. For instance, the drain valve 16 of the fixed- side die with a feeder is closed so that no air flows out from the fixed side, while the drain valve 17 on the moving side is opened and air is exhausted forcedly from an exhaust 14 on the moving side by a blower 15. By this method, the flow of air goes out one-sidedly from the moving side and thereby the flow is regulated, while the air flows out not only from the bottom plate part on the moving side but also from the side plate part on the same side since the pressure of the air inside the moving-side die turns negative, and thus the preliminarily foamed resin is filled up uniformly also on the side of the side plate.
JP17190379A 1979-12-28 1979-12-28 No-cracking mold and molding method thereof Granted JPS5693522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17190379A JPS5693522A (en) 1979-12-28 1979-12-28 No-cracking mold and molding method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17190379A JPS5693522A (en) 1979-12-28 1979-12-28 No-cracking mold and molding method thereof

Publications (2)

Publication Number Publication Date
JPS5693522A true JPS5693522A (en) 1981-07-29
JPH0344898B2 JPH0344898B2 (en) 1991-07-09

Family

ID=15931947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17190379A Granted JPS5693522A (en) 1979-12-28 1979-12-28 No-cracking mold and molding method thereof

Country Status (1)

Country Link
JP (1) JPS5693522A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100350749B1 (en) * 1997-06-18 2002-10-19 가부시키가이샤 제이에스피 Production apparatus of expansion-molded article, and production method of expansion-molded article

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023125840A (en) 2022-02-28 2023-09-07 キヤノン株式会社 Measurement device, measurement method, lithography apparatus, and production method of article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100350749B1 (en) * 1997-06-18 2002-10-19 가부시키가이샤 제이에스피 Production apparatus of expansion-molded article, and production method of expansion-molded article

Also Published As

Publication number Publication date
JPH0344898B2 (en) 1991-07-09

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