JPS5573538A - Injection mold for thin molded article - Google Patents

Injection mold for thin molded article

Info

Publication number
JPS5573538A
JPS5573538A JP14690078A JP14690078A JPS5573538A JP S5573538 A JPS5573538 A JP S5573538A JP 14690078 A JP14690078 A JP 14690078A JP 14690078 A JP14690078 A JP 14690078A JP S5573538 A JPS5573538 A JP S5573538A
Authority
JP
Japan
Prior art keywords
cavity
gap
flow limit
gate
filled
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
JP14690078A
Other languages
Japanese (ja)
Other versions
JPS6059848B2 (en
Inventor
Hideki Yamagishi
Hiroo Suzuki
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.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
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 Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP14690078A priority Critical patent/JPS6059848B2/en
Publication of JPS5573538A publication Critical patent/JPS5573538A/en
Publication of JPS6059848B2 publication Critical patent/JPS6059848B2/en
Expired 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
    • B29C45/26—Moulds
    • 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
    • B29C45/26—Moulds
    • B29C2045/2695—Moulds injecting articles with varying wall thickness, e.g. for making a tear line

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To reduce the amount of resin used and facilitate afterworking and mold release upon molding by gradually enlarging the gap of a cavity over the course from before the flow limit distance of a molten resin to the cavity end. CONSTITUTION:Where the gap of a cavity 3 is t0 and the flow limit distance of a molten resin filled into the cavity from a gate 4 is l0, the gap is gradually enlarged over the course from before the flow limit distance l0 to the end B of the cavity 3 so that the ratio l/t of the distance l between the gate 4 and an arbitrary point to the gap t at the point is roughly equal to l0/t0. When the molten resin forced in from a runner 5 is filled into the cavity 3 through the gate 4, it does not stop flowing at the flow limit point A; instead, it flows as far as the end B of the cavity 3 to thoroughly fill up the cavity 3. After the resin has filled up the cavity 3 and been cooled to solidify, the molded article is released from the mold.
JP14690078A 1978-11-28 1978-11-28 Injection mold for thin-walled products Expired JPS6059848B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14690078A JPS6059848B2 (en) 1978-11-28 1978-11-28 Injection mold for thin-walled products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14690078A JPS6059848B2 (en) 1978-11-28 1978-11-28 Injection mold for thin-walled products

Publications (2)

Publication Number Publication Date
JPS5573538A true JPS5573538A (en) 1980-06-03
JPS6059848B2 JPS6059848B2 (en) 1985-12-27

Family

ID=15418102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14690078A Expired JPS6059848B2 (en) 1978-11-28 1978-11-28 Injection mold for thin-walled products

Country Status (1)

Country Link
JP (1) JPS6059848B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137246A2 (en) * 1983-09-22 1985-04-17 Daicel Chemical Industries, Ltd. Metal mold and stamper for injection molding of a plastic disc for a high-density information recording carrier
FR2774623A1 (en) * 1998-02-09 1999-08-13 Allibert Ind Thin and supple molded plastics sheets for automobile interiors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137246A2 (en) * 1983-09-22 1985-04-17 Daicel Chemical Industries, Ltd. Metal mold and stamper for injection molding of a plastic disc for a high-density information recording carrier
FR2774623A1 (en) * 1998-02-09 1999-08-13 Allibert Ind Thin and supple molded plastics sheets for automobile interiors

Also Published As

Publication number Publication date
JPS6059848B2 (en) 1985-12-27

Similar Documents

Publication Publication Date Title
DE3260413D1 (en) Stabilized core injection molding of plastic
JPS57169335A (en) Injection-compression molding method
ES8606077A1 (en) Method for producing injection-moulded parts, and injection mould for carrying out this method.
ATE31395T1 (en) INJECTION MOLDING WITH A STABILIZED CORE.
JPS642602A (en) Forming method for slider of slide fastener
JPS56169047A (en) Injection molding die
JPS55146718A (en) Intermediate blank made of synthetic resin for molding biaxially spread bottle
JPS5573538A (en) Injection mold for thin molded article
JPS5555842A (en) Metallic plate insert molding and products obtained therethrough
JPS53134062A (en) Multi-layer molded artice, its molding and device
JPS54111557A (en) Hollow molded article having integrated internal ribs, and method for forming the same
JPS5597941A (en) Injection molding die
JPS57127569A (en) Method and device for die casting
JPS5772831A (en) Device for preventing back flow of resin in mold
JPS5570463A (en) Precision casting method
JPS57167224A (en) Manufacture of synthetic resin molding with foamed layer
JPS5770626A (en) Resin backflow preventing mechanism of mold
JPS5569421A (en) Modling of frame for electric appliance
JPS56108236A (en) Method and apparatus for resin seal for semiconductor device
JPS57105331A (en) Metal mold device for injection compression molding
JPS55117550A (en) Injection part construction of die-casting device
JPS53120768A (en) Molds for thermosetting resins
JPS56100429A (en) Resin molding method
JPH0547623Y2 (en)
JPS54125254A (en) Injection molding machine for thermosetting resin