JPS57150547A - Method and apparatus for manufacturing slender and long product - Google Patents

Method and apparatus for manufacturing slender and long product

Info

Publication number
JPS57150547A
JPS57150547A JP3580881A JP3580881A JPS57150547A JP S57150547 A JPS57150547 A JP S57150547A JP 3580881 A JP3580881 A JP 3580881A JP 3580881 A JP3580881 A JP 3580881A JP S57150547 A JPS57150547 A JP S57150547A
Authority
JP
Japan
Prior art keywords
synthetic resin
runner
cavity
movable mold
fixed mold
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
JP3580881A
Other languages
Japanese (ja)
Other versions
JPS6135922B2 (en
Inventor
Shoichiro Kumazawa
Toshihiro Wada
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Priority to JP3580881A priority Critical patent/JPS57150547A/en
Publication of JPS57150547A publication Critical patent/JPS57150547A/en
Publication of JPS6135922B2 publication Critical patent/JPS6135922B2/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
    • B29C45/26—Moulds

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent the deflection of synthetic resin pointers by large runner by disconnecting a large center runner through which synthetic resin is supplied into pointer-forming portions when a large number of synthetic resin points are concurrently and integrally manufactured. CONSTITUTION:A cavity is formed by a fixed mold 5 and a movable mold 6 and a synthetic resin is cast into the cavity from a gate 11. The synthetic resin quickly goes into pointer-forming recessed portions 10 and 13 through a central cavity 9, a tunnel gate 12, and recessed portions 7 and 8 and molded. In the injection molding, when the movable mold 6 is separated from the fixed mold 5, a molding A is separated as it is in contact with the movable mold by an ejection pin 16, whereupon, however, the central runner 3 is disconnected at the tunnel gate 3b by means of the tunnel gate 12 of the fixed mold 5. By this, the warpage of pointers due to the large shrinkage of the large central runner can be avoided.
JP3580881A 1981-03-12 1981-03-12 Method and apparatus for manufacturing slender and long product Granted JPS57150547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3580881A JPS57150547A (en) 1981-03-12 1981-03-12 Method and apparatus for manufacturing slender and long product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3580881A JPS57150547A (en) 1981-03-12 1981-03-12 Method and apparatus for manufacturing slender and long product

Publications (2)

Publication Number Publication Date
JPS57150547A true JPS57150547A (en) 1982-09-17
JPS6135922B2 JPS6135922B2 (en) 1986-08-15

Family

ID=12452222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3580881A Granted JPS57150547A (en) 1981-03-12 1981-03-12 Method and apparatus for manufacturing slender and long product

Country Status (1)

Country Link
JP (1) JPS57150547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204123U (en) * 1981-06-24 1982-12-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204123U (en) * 1981-06-24 1982-12-25
JPS6224496Y2 (en) * 1981-06-24 1987-06-23

Also Published As

Publication number Publication date
JPS6135922B2 (en) 1986-08-15

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