JPS6485724A - Method for injection molding cylindrical molded item - Google Patents

Method for injection molding cylindrical molded item

Info

Publication number
JPS6485724A
JPS6485724A JP24349187A JP24349187A JPS6485724A JP S6485724 A JPS6485724 A JP S6485724A JP 24349187 A JP24349187 A JP 24349187A JP 24349187 A JP24349187 A JP 24349187A JP S6485724 A JPS6485724 A JP S6485724A
Authority
JP
Japan
Prior art keywords
mold
cylinder
liquid
contact
gas
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
JP24349187A
Other languages
Japanese (ja)
Other versions
JPH0712635B2 (en
Inventor
Katsumasa Miwa
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.)
Polyplastics Co Ltd
Original Assignee
Polyplastics 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 Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Priority to JP24349187A priority Critical patent/JPH0712635B2/en
Publication of JPS6485724A publication Critical patent/JPS6485724A/en
Publication of JPH0712635B2 publication Critical patent/JPH0712635B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7337—Heating or cooling of the mould using gas or steam
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7343—Heating or cooling of the mould heating or cooling different mould parts at different temperatures

Landscapes

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

Abstract

PURPOSE:To obtain a molded item excellent in cylindricality by a method wherein the temperature difference larger than the specified value is given between the surface temperature of a mold in contact with the tip opening part of a cylinder and that of a mold in contact with the middle part of the cylinder. CONSTITUTION:A cylindrical mold having an excellent cylindricality may be obtained by molding with a mold, in which the temperature difference is provided so that the surface temperature of a mold in contact with the tip opening part of a cylinder is made to be higher than that of a mold in contact with the middle part of the cylinder. In this case, the surface temperature difference the molds is at least 3 deg.C, preferably 5 deg.C or higher. The means to provide temperature difference between molds is a method to heat with a heater provided near the tip opening part cavity of a cylinder of a mold, one to flow highly temperature-controlled liquid or gas in a liquid or gas in a liquid or gas channel provided near the tip opening part cavity of the cylinder of the mold, or one to flow lowly temperature-controlled liquid or gas in a liquid or gas channel provided near the middle part of the cylinder of the mold.
JP24349187A 1987-09-28 1987-09-28 Injection molding method for cylindrical molded products Expired - Lifetime JPH0712635B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24349187A JPH0712635B2 (en) 1987-09-28 1987-09-28 Injection molding method for cylindrical molded products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24349187A JPH0712635B2 (en) 1987-09-28 1987-09-28 Injection molding method for cylindrical molded products

Publications (2)

Publication Number Publication Date
JPS6485724A true JPS6485724A (en) 1989-03-30
JPH0712635B2 JPH0712635B2 (en) 1995-02-15

Family

ID=17104680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24349187A Expired - Lifetime JPH0712635B2 (en) 1987-09-28 1987-09-28 Injection molding method for cylindrical molded products

Country Status (1)

Country Link
JP (1) JPH0712635B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0337805A2 (en) * 1988-04-15 1989-10-18 Polyplastics Co. Ltd. Metal mold for injection molding tubular or columnar products and molded product obtained by using same
JPH01320122A (en) * 1988-06-23 1989-12-26 Brother Ind Ltd Injection mold of cylindrical synthetic resin molded item
WO2005030468A1 (en) * 2003-09-30 2005-04-07 Zeon Corporation Thick flat-plate molded product and method of producing the same
JP2008049711A (en) * 2007-11-06 2008-03-06 Mitsubishi Electric Corp Molding die and manufacturing process of through-holed molded article
JP2011016378A (en) * 2010-10-13 2011-01-27 Olympus Imaging Corp Tubular component

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0337805A2 (en) * 1988-04-15 1989-10-18 Polyplastics Co. Ltd. Metal mold for injection molding tubular or columnar products and molded product obtained by using same
EP0337805A3 (en) * 1988-04-15 1991-06-12 Polyplastics Co. Ltd. Metal mold for injection molding tubular or columnar products and molded product obtained by using same
JPH01320122A (en) * 1988-06-23 1989-12-26 Brother Ind Ltd Injection mold of cylindrical synthetic resin molded item
WO2005030468A1 (en) * 2003-09-30 2005-04-07 Zeon Corporation Thick flat-plate molded product and method of producing the same
JP2008049711A (en) * 2007-11-06 2008-03-06 Mitsubishi Electric Corp Molding die and manufacturing process of through-holed molded article
JP2011016378A (en) * 2010-10-13 2011-01-27 Olympus Imaging Corp Tubular component

Also Published As

Publication number Publication date
JPH0712635B2 (en) 1995-02-15

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