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JPS5684931A - Preparation of synthetic resin molding having curved space inside thereof - Google Patents

Preparation of synthetic resin molding having curved space inside thereof

Info

Publication number
JPS5684931A
JPS5684931A JP16333279A JP16333279A JPS5684931A JP S5684931 A JPS5684931 A JP S5684931A JP 16333279 A JP16333279 A JP 16333279A JP 16333279 A JP16333279 A JP 16333279A JP S5684931 A JPS5684931 A JP S5684931A
Authority
JP
Japan
Prior art keywords
molding
insert
melting point
cooling medium
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
JP16333279A
Other languages
Japanese (ja)
Inventor
Shusaku Tamaru
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.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial 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 Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP16333279A priority Critical patent/JPS5684931A/en
Publication of JPS5684931A publication Critical patent/JPS5684931A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To manufacture a molding having a crooked passageway at the inner part thereof correctly by a method wherein the resin is poured into a mold and is molded therein while a cooling medium is flowed through inside of a tubular insert mounted in the mold and made of a low melting point alloy, thereafter, the insert is removed by melting at the last stage.
CONSTITUTION: The tubular insert 12 made of the low melting point alloy having melting point of 55W180°C is mounted in the mold consisting of a top force 11 and a bottom tool 10 and the thermoplastic resin is injected from a gate 14 while the cooling medium M is flowed through the cooling medium passageway 16 in the insert. At the last stage, the insert 12 is removed by melting and the molding such as a bent pipe which has an internal passageway therein is manufactured. This method may be applied to a transfer molding, a liquid injection molding and a cast molding. The alloy containing at least one of Bi, Pb and Sn is preferable as the low melting point alloy. According to this method, the form will never cause thermal deformation upon molding or removing the insert.
COPYRIGHT: (C)1981,JPO&Japio
JP16333279A 1979-12-14 1979-12-14 Preparation of synthetic resin molding having curved space inside thereof Pending JPS5684931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16333279A JPS5684931A (en) 1979-12-14 1979-12-14 Preparation of synthetic resin molding having curved space inside thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16333279A JPS5684931A (en) 1979-12-14 1979-12-14 Preparation of synthetic resin molding having curved space inside thereof

Publications (1)

Publication Number Publication Date
JPS5684931A true JPS5684931A (en) 1981-07-10

Family

ID=15771837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16333279A Pending JPS5684931A (en) 1979-12-14 1979-12-14 Preparation of synthetic resin molding having curved space inside thereof

Country Status (1)

Country Link
JP (1) JPS5684931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212921A (en) * 1982-06-04 1983-12-10 Aron Kasei Co Ltd Molding method of plastic hollow product
JPS6013518A (en) * 1983-07-04 1985-01-24 Daiwa Giken:Kk Molding process of undercut product
JP2007276224A (en) * 2006-04-05 2007-10-25 It Techno Kk Cooling structure of arc-shaped core mold and method for forming arc-shaped cooling water hole in the core mold

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229431A (en) * 1975-09-01 1977-03-05 Kubota Ltd Method of casting around objects
JPS54156080A (en) * 1978-05-31 1979-12-08 Nitto Electric Ind Co Ltd Manufacture of pipe connection member in tubular module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229431A (en) * 1975-09-01 1977-03-05 Kubota Ltd Method of casting around objects
JPS54156080A (en) * 1978-05-31 1979-12-08 Nitto Electric Ind Co Ltd Manufacture of pipe connection member in tubular module

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212921A (en) * 1982-06-04 1983-12-10 Aron Kasei Co Ltd Molding method of plastic hollow product
JPH0155082B2 (en) * 1982-06-04 1989-11-22 Aron Kasei Kk
JPS6013518A (en) * 1983-07-04 1985-01-24 Daiwa Giken:Kk Molding process of undercut product
JPH0119327B2 (en) * 1983-07-04 1989-04-11 Daiwa Giken Kk
JP2007276224A (en) * 2006-04-05 2007-10-25 It Techno Kk Cooling structure of arc-shaped core mold and method for forming arc-shaped cooling water hole in the core mold

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