JPS6467315A - Injection molding method and its device - Google Patents

Injection molding method and its device

Info

Publication number
JPS6467315A
JPS6467315A JP22424087A JP22424087A JPS6467315A JP S6467315 A JPS6467315 A JP S6467315A JP 22424087 A JP22424087 A JP 22424087A JP 22424087 A JP22424087 A JP 22424087A JP S6467315 A JPS6467315 A JP S6467315A
Authority
JP
Japan
Prior art keywords
molding material
cavity
weir
filled
gate
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
JP22424087A
Other languages
Japanese (ja)
Other versions
JPH0528647B2 (en
Inventor
Mitsuo Ogura
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.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei 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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP22424087A priority Critical patent/JPS6467315A/en
Publication of JPS6467315A publication Critical patent/JPS6467315A/en
Publication of JPH0528647B2 publication Critical patent/JPH0528647B2/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part

Abstract

PURPOSE:To reduce generation of short shot defects of a thin wall section and make a device compact by filling a molding material in a first cavity divided from other sections by means of a movable weir surrounding sections hard to be filled with the molding material and a gate and then moving the weir to a retreated position. CONSTITUTION:A cyclic holding channel 15 is formed in a manner that a gate 4 and a thin wall section 26 are positioned inside the channel on the lower surface of a fixed mold 5, and a weir 8 is held in the holding channel 15. When a molding material is injected from a gate 4 in the state of disposing said weir 8 protrudingly in a dividing position to form a first cavity 9, the molding material is filled completely in the first cavity 9. Then the molding material is flowed into a space delta and the weir 8 is moved upwardly by the action of injection pressure of the molding material, filled in the whole of a cavity 2 to form a molded product 1. As the molding material is filled in the other parts of the cavity after being filled in the thin wall section and the like as above-mentioned, short shot defects can be reduced.
JP22424087A 1987-09-08 1987-09-08 Injection molding method and its device Granted JPS6467315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22424087A JPS6467315A (en) 1987-09-08 1987-09-08 Injection molding method and its device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22424087A JPS6467315A (en) 1987-09-08 1987-09-08 Injection molding method and its device

Publications (2)

Publication Number Publication Date
JPS6467315A true JPS6467315A (en) 1989-03-14
JPH0528647B2 JPH0528647B2 (en) 1993-04-27

Family

ID=16810688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22424087A Granted JPS6467315A (en) 1987-09-08 1987-09-08 Injection molding method and its device

Country Status (1)

Country Link
JP (1) JPS6467315A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010088552A (en) * 2008-10-06 2010-04-22 Maxell Seiki Kk Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010088552A (en) * 2008-10-06 2010-04-22 Maxell Seiki Kk Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap

Also Published As

Publication number Publication date
JPH0528647B2 (en) 1993-04-27

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