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JPS56106841A - Method and device for continuous injection molding of rod body such as crayon - Google Patents

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

Info

Publication number
JPS56106841A
JPS56106841A JP1022180A JP1022180A JPS56106841A JP S56106841 A JPS56106841 A JP S56106841A JP 1022180 A JP1022180 A JP 1022180A JP 1022180 A JP1022180 A JP 1022180A JP S56106841 A JPS56106841 A JP S56106841A
Authority
JP
Japan
Prior art keywords
hole
moldings
molding
metal mold
cooled
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
JP1022180A
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 JP1022180A priority Critical patent/JPS56106841A/en
Publication of JPS56106841A publication Critical patent/JPS56106841A/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
    • B29C45/17—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
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
    • 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
    • B29C2045/5695—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 using a movable mould part for continuously increasing the volume of the mould cavity to its final dimension during the whole injection step

Landscapes

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

Abstract

PURPOSE:To shorten cooling time by a method wherein through holes for molding are formed into a metal mold by two stages, and injection molding is conducted by one through hole while moldings being previously injected and molded are cooled in the other through hole. CONSTITUTION:A melted composition is injected backing an injector pin 2a into a through hole 1a at an upper stage as a molding 7 manufactured by a preceding process in a through hole 1b at lower stage are left as they are cooled by means of a cooling pipe 6b. After completion of injection, a metal mold 1 and a plate 4 at the fixing side are form-opened, an ejector pin 2b at the lower stage is right moved and the moldings 7 being completely cooled are extruded. The metal mold 1 is half turned up and down, and moved so that the through hole 1b being emptied is upward located and the through hole 1a into which the moldings 7 are filled is downward located, and this process is further repeated. A molding cycle is improved because cooling time is shortened. Or the moldings having no bubble, etc. and a smooth surface are obtained because injection time can be prolonged.
JP1022180A 1980-01-31 1980-01-31 Method and device for continuous injection molding of rod body such as crayon Pending JPS56106841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1022180A JPS56106841A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding of rod body such as crayon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1022180A JPS56106841A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding of rod body such as crayon

Publications (1)

Publication Number Publication Date
JPS56106841A true JPS56106841A (en) 1981-08-25

Family

ID=11744213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1022180A Pending JPS56106841A (en) 1980-01-31 1980-01-31 Method and device for continuous injection molding of rod body such as crayon

Country Status (1)

Country Link
JP (1) JPS56106841A (en)

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