JPS5490261A - Injection mold - Google Patents

Injection mold

Info

Publication number
JPS5490261A
JPS5490261A JP15918077A JP15918077A JPS5490261A JP S5490261 A JPS5490261 A JP S5490261A JP 15918077 A JP15918077 A JP 15918077A JP 15918077 A JP15918077 A JP 15918077A JP S5490261 A JPS5490261 A JP S5490261A
Authority
JP
Japan
Prior art keywords
mold
forms
cylindrical article
elastomer
circumference
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
JP15918077A
Other languages
Japanese (ja)
Inventor
Mitsuaki Asano
Shigenobu Kato
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP15918077A priority Critical patent/JPS5490261A/en
Publication of JPS5490261A publication Critical patent/JPS5490261A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE: To provide the title mold having simple structure and from which the molded article is easily released, comprising an outer mold which forms the outer surface of a cylindrical article, and an inner mold furnished with an elastic member which forms an undercut of the product.
CONSTITUTION: The injection mold is composed of an outer mold 3 comprising a stationary mold 1 which forms the outer surface of a cylindrical article 4, and a movable mold 2; and an inner mold 5 comprising a base mold 7 which forms the inner surface of the cylindrical article 4 excluding the undercut part, and a sliding mold 9 fitted to the right end of the base mold 7 having reduced diameter 8. A circular groove 20 at the circumference of the left end of the mold 9 is fitted with a circular ridge 19 of an elastic ring 18 made of a synthetic rubber. When the mold is in the opened state, the circumference 21 of the elastomer 18 is on the same plane to the surface 22 of the mold 9; and when it is closed, the elastomer 18 is compressed by the pressure of the inner mold between the vertical face 11 of the sliding mold 8 and the mold 9, and bulges outwardly from the face 22 of the mold 9 to form a semicircular curve, which forms a mold surface 23 for the undercut part.
COPYRIGHT: (C)1979,JPO&Japio
JP15918077A 1977-12-27 1977-12-27 Injection mold Pending JPS5490261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15918077A JPS5490261A (en) 1977-12-27 1977-12-27 Injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15918077A JPS5490261A (en) 1977-12-27 1977-12-27 Injection mold

Publications (1)

Publication Number Publication Date
JPS5490261A true JPS5490261A (en) 1979-07-17

Family

ID=15688039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15918077A Pending JPS5490261A (en) 1977-12-27 1977-12-27 Injection mold

Country Status (1)

Country Link
JP (1) JPS5490261A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606415A (en) * 1983-06-24 1985-01-14 Showa Gomme Kk Mold apparatus for producing item with constricted section such as teat and the like
JPS6335311A (en) * 1986-07-30 1988-02-16 Kubota Kanagata Kosakusho:Kk Undercut product and its method of molding
JPH03116912U (en) * 1990-03-12 1991-12-03
JPH05318571A (en) * 1992-05-25 1993-12-03 Kodama Kagaku Kogyo Kk Vacuum molding apparatus of cylindrical molded product having annular protruding part
JP2009262418A (en) * 2008-04-25 2009-11-12 Starlite Co Ltd Mold device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606415A (en) * 1983-06-24 1985-01-14 Showa Gomme Kk Mold apparatus for producing item with constricted section such as teat and the like
JPH033568B2 (en) * 1983-06-24 1991-01-18 Showa Rubber
JPS6335311A (en) * 1986-07-30 1988-02-16 Kubota Kanagata Kosakusho:Kk Undercut product and its method of molding
JPH03116912U (en) * 1990-03-12 1991-12-03
JPH05318571A (en) * 1992-05-25 1993-12-03 Kodama Kagaku Kogyo Kk Vacuum molding apparatus of cylindrical molded product having annular protruding part
JP2009262418A (en) * 2008-04-25 2009-11-12 Starlite Co Ltd Mold device

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