JPS5775809A - Molding apparatus - Google Patents

Molding apparatus

Info

Publication number
JPS5775809A
JPS5775809A JP15303680A JP15303680A JPS5775809A JP S5775809 A JPS5775809 A JP S5775809A JP 15303680 A JP15303680 A JP 15303680A JP 15303680 A JP15303680 A JP 15303680A JP S5775809 A JPS5775809 A JP S5775809A
Authority
JP
Japan
Prior art keywords
leaf spring
split
diameter
split core
core
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
JP15303680A
Other languages
Japanese (ja)
Inventor
Kiyoshi Morikawa
Nobuhiko Nakagawa
Isamu Sugasawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15303680A priority Critical patent/JPS5775809A/en
Publication of JPS5775809A publication Critical patent/JPS5775809A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE: To mold a complicated hollow article having protruded part by a simple means by a method wherein a split core forcedly closed to a direction reducing a diameter thereof is used and a leaf spring enlarging the diameter of said split core is operated by a contact member.
CONSTITUTION: A split core 3 with a truncated shape and a split core 4 with a fan shape forcedly closed so as to reduce a diameter thereof to an axial direction are respectively opened widely to a predetermined position by a leaf spring 7 (a mark 7a is a slit in order to facilitate bending) fixedly provided to a leading end of a drawing rod (a leaf spring holding member) 6 and, after a predetermined cavity (not shown) is covered therearound, a synthetic resin is injected between the cavity and the split cores. Next, when the leaf spring 7 is bent by drawing the drawing rod 6 to a right direction to contact a leading end of a core ring 8 with the leaf spring 7, the split cores 3, 4 are contracted in this order and, therefore, a molded product having an undercut part or the like can be easily demolded.
COPYRIGHT: (C)1982,JPO&Japio
JP15303680A 1980-10-31 1980-10-31 Molding apparatus Pending JPS5775809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15303680A JPS5775809A (en) 1980-10-31 1980-10-31 Molding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15303680A JPS5775809A (en) 1980-10-31 1980-10-31 Molding apparatus

Publications (1)

Publication Number Publication Date
JPS5775809A true JPS5775809A (en) 1982-05-12

Family

ID=15553565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15303680A Pending JPS5775809A (en) 1980-10-31 1980-10-31 Molding apparatus

Country Status (1)

Country Link
JP (1) JPS5775809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7713603B2 (en) 2005-10-28 2010-05-11 Vitec, Llc Molded article method, and apparatus for providing an undercut molding feature in a mold tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7713603B2 (en) 2005-10-28 2010-05-11 Vitec, Llc Molded article method, and apparatus for providing an undercut molding feature in a mold tool

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