JPS56106842A - Method and device for continuous injection molding for rod body such as crayon - Google Patents

Method and device for continuous injection molding for rod body such as crayon

Info

Publication number
JPS56106842A
JPS56106842A JP1022280A JP1022280A JPS56106842A JP S56106842 A JPS56106842 A JP S56106842A JP 1022280 A JP1022280 A JP 1022280A JP 1022280 A JP1022280 A JP 1022280A JP S56106842 A JPS56106842 A JP S56106842A
Authority
JP
Japan
Prior art keywords
screw
hole
melted composition
void
metal 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.)
Pending
Application number
JP1022280A
Other languages
Japanese (ja)
Inventor
Shigeru Saito
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.)
Pentel Co Ltd
Original Assignee
Pentel 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 Pentel Co Ltd filed Critical Pentel Co Ltd
Priority to JP1022280A priority Critical patent/JPS56106842A/en
Publication of JPS56106842A publication Critical patent/JPS56106842A/en
Pending 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
    • B29C45/03—Injection moulding apparatus
    • 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
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw

Abstract

PURPOSE:To manufacture moldings having no weld line and injecting pattern and possessing high density by a mechanism wherein a screw inserted into a void of a through hole of a metal mold is turned, and a melted composition is sent into the through hole while the screw is backed. CONSTITUTION:A screw 3 is advanced to the left in a through hole 1a, and contacted and opposed to an ejector pin 9. A melted composition 10 in a hopper 5 is supplied to the screw 3, a motor 4 is turned and the screw 3 is backed to the right. The melted composition is filled into a void in the through hole 1a formed by the backing of the screw at the same time, and molding is completed. Lastly, a metal mold 1 and a screw type material feeder 2 are opened, the ejector pin 9 is right pushed and slid and moldings are extracted from the metal mold. A weld line, etc. are not formed because the melted composition is successively filled from a nose of the void of the through hole, backing the screw 3.
JP1022280A 1980-01-31 1980-01-31 Method and device for continuous injection molding for rod body such as crayon Pending JPS56106842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1022280A JPS56106842A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding for rod body such as crayon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1022280A JPS56106842A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding for rod body such as crayon

Publications (1)

Publication Number Publication Date
JPS56106842A true JPS56106842A (en) 1981-08-25

Family

ID=11744243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1022280A Pending JPS56106842A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding for rod body such as crayon

Country Status (1)

Country Link
JP (1) JPS56106842A (en)

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