JPS55154139A - Improved method for injection molding - Google Patents

Improved method for injection molding

Info

Publication number
JPS55154139A
JPS55154139A JP6235979A JP6235979A JPS55154139A JP S55154139 A JPS55154139 A JP S55154139A JP 6235979 A JP6235979 A JP 6235979A JP 6235979 A JP6235979 A JP 6235979A JP S55154139 A JPS55154139 A JP S55154139A
Authority
JP
Japan
Prior art keywords
thermoplastic resin
gate
injection molding
average molecular
molecular weight
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
JP6235979A
Other languages
Japanese (ja)
Inventor
Osamu Amano
Takashi Kobayashi
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.)
Eneos Corp
Original Assignee
Nippon Petrochemicals 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 Nippon Petrochemicals Co Ltd filed Critical Nippon Petrochemicals Co Ltd
Priority to JP6235979A priority Critical patent/JPS55154139A/en
Publication of JPS55154139A publication Critical patent/JPS55154139A/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
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material

Landscapes

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

Abstract

PURPOSE:To prevent drooping of materials from a gate by forming the thermoplastic resin containing an inorganic powdered filler by using a forming metal die with the gate of specific structure. CONSTITUTION:A material prepared by mixing 100pts.wt. of thermoplastic resin (A) composed of 50-100wt% of thermoplastic resin of micromolecular weight whose average molecular weight and softening point on circular-spherical method are 300-5,000 and 60-200 deg.C, respectively (ex. polyethylene wax) (a) and 0- 50wt% of thermoplastic resin of macromolecular weight whose average molecular weight is 5,000 or more (ex. polystyrene) (b) with 10-900pts.wt. of an inorganic powdered collecting and filling agent (B) in the state of solid powder is formed by using an injection molding device wherein a groove 2 is provided in the direction crossing that of material injection in the inside surface of the gate 1 of a forming metal die. USE:A target for clay pigeon shooting and others.
JP6235979A 1979-05-21 1979-05-21 Improved method for injection molding Pending JPS55154139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6235979A JPS55154139A (en) 1979-05-21 1979-05-21 Improved method for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6235979A JPS55154139A (en) 1979-05-21 1979-05-21 Improved method for injection molding

Publications (1)

Publication Number Publication Date
JPS55154139A true JPS55154139A (en) 1980-12-01

Family

ID=13197835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6235979A Pending JPS55154139A (en) 1979-05-21 1979-05-21 Improved method for injection molding

Country Status (1)

Country Link
JP (1) JPS55154139A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4402902A (en) * 1981-12-07 1983-09-06 Borg-Warner Corporation Method for molding glass-filled thermoplastic resins
JPS5956457A (en) * 1982-06-16 1984-03-31 ザ　ユニバ−シテイ−　オブ　トロント　イノベ−シヨンズ　フアンデ−シヨン Reinforced resin composite body and manufacture
US4978558A (en) * 1988-06-10 1990-12-18 United Technologies Corporation Method for applying diffusion coating masks
US5908890A (en) * 1997-08-08 1999-06-01 Cr Minerals Corporation Antiblock agent for polyolefin films
US6458880B1 (en) 1999-10-18 2002-10-01 Noveon Ip Holdings Corp. Polyurethanes with talc crystallization promoter
CN1325566C (en) * 2004-10-29 2007-07-11 中国石油化工股份有限公司 Grinding material for precision casting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4402902A (en) * 1981-12-07 1983-09-06 Borg-Warner Corporation Method for molding glass-filled thermoplastic resins
JPS5956457A (en) * 1982-06-16 1984-03-31 ザ　ユニバ−シテイ−　オブ　トロント　イノベ−シヨンズ　フアンデ−シヨン Reinforced resin composite body and manufacture
US4978558A (en) * 1988-06-10 1990-12-18 United Technologies Corporation Method for applying diffusion coating masks
US5908890A (en) * 1997-08-08 1999-06-01 Cr Minerals Corporation Antiblock agent for polyolefin films
US6458880B1 (en) 1999-10-18 2002-10-01 Noveon Ip Holdings Corp. Polyurethanes with talc crystallization promoter
CN1325566C (en) * 2004-10-29 2007-07-11 中国石油化工股份有限公司 Grinding material for precision casting

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