JPS59142110A - Mold for molding item with undercut - Google Patents

Mold for molding item with undercut

Info

Publication number
JPS59142110A
JPS59142110A JP1648583A JP1648583A JPS59142110A JP S59142110 A JPS59142110 A JP S59142110A JP 1648583 A JP1648583 A JP 1648583A JP 1648583 A JP1648583 A JP 1648583A JP S59142110 A JPS59142110 A JP S59142110A
Authority
JP
Japan
Prior art keywords
undercut
mold
molded product
slide core
ejection direction
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
JP1648583A
Other languages
Japanese (ja)
Other versions
JPH0360647B2 (en
Inventor
Genjiro Kubota
窪田　源次郎
Hirotoshi Niigashira
新頭　宏利
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.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei 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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP1648583A priority Critical patent/JPS59142110A/en
Publication of JPS59142110A publication Critical patent/JPS59142110A/en
Publication of JPH0360647B2 publication Critical patent/JPH0360647B2/ja
Granted 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles

Abstract

PURPOSE:To carry out mold release positively, by forming an undercut forming surface of a slide core such that a side surface of an undercut of a molded item may be slanted against the ejection direction, and perform rounded corner finishing or chamfering an outer edge of a slide core sliding surface that faces the ejection direction. CONSTITUTION:The undercut forming surface 10a of the slide core 10 is slanted such that the side surface 4a of the undercut 4 of the molded item (M) may be slanted against the ejection direction. The outer edge 16a of the slide core sliding surface 16 of the movable mold 8 that faces the ejection direction is rounded or chamfered. The angle of the slant of the side surface 4a is 20-40 deg.. The radius of curvature of the edge 16a is to be 0.5-1.0, and preferably the angle of the chamfer of the side surface 4a is on the order of 45 deg.. After the completion of the molding, and when the mold is opened and the molded item (M) is ejected, a protrusion 4 is slid on the edge 16a of the movable mold 8 as shown so that the molded item (M) is ejected to complete the release positively.

Description

【発明の詳細な説明】 この発明は、アンダーカット突起を有しかつ平面壁及び
側壁にそれぞれ金型の可動型及びスライドコアで旧形さ
れる凹部（孔部を含む）を備えた成形品の成形に用いる
金型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a molded product having an undercut protrusion and having recesses (including holes) formed in a plane wall and a side wall by a movable die and a slide core of a mold, respectively. Related to molds used for molding.

」二記種類の成形品Ｍとして、ここでは、第１図に示す
ような、平面壁ｌにリブ付き孔２を備えるとともに、側
壁３には下端にアンダーカット突起４及び中間部にテー
パ孔５をそれぞれ備えた合成樹脂製のものを例に採り説
明するがこれに限られるものではない。As shown in FIG. 1, the molded product M of type 2 is provided with a ribbed hole 2 in the plane wall l, and an undercut protrusion 4 in the lower end of the side wall 3 and a tapered hole 5 in the middle part. The explanation will be given by taking as an example a synthetic resin material having each of these, but the invention is not limited to this.

第１図に示す成形品Ｍの成形金型は、従来第２図に示す
ように、キャビティの大部分を固定型７と苛動型８とで
形成する金型において、スライドコア１０で側壁３のア
ンダーカット突起４及びテーパ孔５を付形し、また、平
面壁ｌのリブ付き孔２を可動型８で付形するように構成
されている。The molding die for the molded product M shown in FIG. 1 is conventionally used, as shown in FIG. The undercut protrusion 4 and the tapered hole 5 are shaped, and the ribbed hole 2 in the plane wall 1 is shaped by a movable mold 8.

この金型を用いて射出・トランスフナ−等により成形を
完了後、型開らき時に（第３図）において、スライドコ
ア１０は背板１１に取り付けられた傾斜ブロック１３の
作用で後退し成形品のアンダーカット突起４及びテーパ
孔５におけるスライドコアｌＯとの保合は解除され、続
いて突き出しピン１４の相対的前進により成形品Ｍは突
き出される。成形品突き出し方向に対向する可動型８の
スライドコア摺動面１６の外側エツジｊ６ａに成形品の
アンダーカット突起４が係合して離型が確実に行なわれ
ず、しばしば手で補助して離型を完了させる必要があっ
た。After molding is completed using this mold by injection, transfner, etc., when the mold is opened (Fig. 3), the slide core 10 is moved back by the action of the inclined block 13 attached to the back plate 11 to form the molded product. The undercut protrusion 4 and the tapered hole 5 are released from the slide core lO, and the molded product M is then ejected by the relative advancement of the ejector pin 14. The molded product's undercut protrusion 4 engages with the outer edge j6a of the slide core sliding surface 16 of the movable mold 8 facing in the molded product ejection direction, making it difficult to reliably release the mold, and often requiring manual assistance to release the mold. needed to be completed.

この発明、は、上記にかんがみて、アンダーカットを有
し、特定の四部を備えた成形品の離型を確実に行なうこ
とのできる金型を提供することを目的とする。In view of the above, an object of the present invention is to provide a mold that has an undercut and can reliably release a molded product having four specific parts.

この発明のアンダーカット成形品用金型は、スライドコ
アが取り付けられたものにおいて、アンダーカット突起
の成形品突き出し方向側面が斜面となるようにスライド
コアのアンダーカット付形面を形成するとともに、成形
品突き出し方向と対向する０工動型のスライドコア摺動
面の外側エツジをＨ仕−ヒげ又は面取りすることにより
上記目的を達成する。In the mold for an undercut molded product of the present invention, in which a slide core is attached, the undercut shaped surface of the slide core is formed so that the side surface of the undercut protrusion in the molded product protrusion direction is a slope, and The above object is achieved by H-shaping or chamfering the outer edge of the sliding surface of the slide core of the zero-working type that faces the product ejection direction.

以下、この発明の一実施例を、第４〜６図に基づいて説
明する。Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 to 6.

第４図に示すように、第２図に示す従来の金型において
、成形品のアンダーカット突起４の成形品突き出し方向
側面４ａが斜面となるようにスライドコアｌＯのアンダ
ーカット付形面１０ａが斜切されて形成されているとと
もに、成形品突き出し方向と対向する可動型８のスライ
ドコア摺動面１６の外側エツジ１６ａがＲ仕上げ又は面
取りされている。ことのき、アンダーカット突起の成形
品突き出し方向側面４ａの斜面角度は通常２０〜４０”
とする。また上記可動型のエツジ１６ａの仕上げＲは０
．５〜１．ＯＲとし、また面取り角度は４５°前後が望
ましい。As shown in FIG. 4, in the conventional mold shown in FIG. 2, the undercut shaped surface 10a of the slide core IO is arranged such that the side surface 4a of the undercut protrusion 4 of the molded product in the molded product protrusion direction becomes an inclined surface. The outer edge 16a of the slide core sliding surface 16 of the movable mold 8 facing the molded product ejection direction is rounded or chamfered. The slope angle of the side surface 4a of the undercut protrusion in the direction of protrusion of the molded product is usually 20 to 40".
shall be. Furthermore, the finish R of the movable edge 16a is 0.
．． 5-1. OR, and the chamfer angle is preferably around 45°.

上記実施例の金型を用いて、第２図の場合と同様、成形
完了後、型開らき時において成形品Ｍを突き出す。この
とき、成形品のアンダーカット突起４の成形品突き出し
方向側面４ａが斜面とされ、しかも、成形品突き出し方
向と対向するスライドコア摺動面、即ちアンダーカット
突起４と対向する面のエツジ１６ａがＲ仕上げ又は面取
りされているので、アンダーカット突起４は可動型８の
エツジ１６ａを第５図に示すように滑り、成形品Ｍは突
き出されて、第６図に示すように確実に離型を完了し自
動的に金型から落下する。Using the mold of the above embodiment, as in the case of FIG. 2, after molding is completed, the molded product M is ejected when the mold is opened. At this time, the side surface 4a of the undercut projection 4 of the molded product in the molded product ejection direction is an inclined surface, and the slide core sliding surface facing the molded product ejection direction, that is, the edge 16a of the surface facing the undercut projection 4 is an inclined surface. Since it is rounded or chamfered, the undercut protrusion 4 slides on the edge 16a of the movable mold 8 as shown in FIG. 5, and the molded product M is ejected to ensure mold release as shown in FIG. Complete and automatically fall from the mold.

なお、」−記成形品における各孔２．５は、開口してい
ない四部としてもよい。In addition, each hole 2.5 in the molded product described in "-" may be formed into four parts that are not open.

この発明のアンダーカット成形品金型は、上記のような
構成なので、アンダーカットを有し、特定の凹部を備え
た成形品の離型の自動化が容易となり省力化につながる
。Since the mold for an undercut molded product of the present invention has the above-described configuration, it is easy to automate the release of a molded product having an undercut and a specific recess, leading to labor savings.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はアンダーカット成形品の一例を示す切欠き斜視
図、第２図は従来の金型（閉時）の要部断面図、第３図
は第２図の金型における離型途中状態を示す要部断面図
、第４図はこの発明の実施例の金型（閉時）の要部断面
図、第５図は第４図の金型における離型途中状態を示す
要部断面図、第６図は同じく離型完了状態を示す要部断
面図である。 ｌ・・・平面壁、２・・・リブ付き孔（凹部）、３・・
・側壁、４・・・アンダーカット突起、５・・・テーノ
ぐ孔（凹部）、７・・・固定型、８・・・可動型、ｌＯ
・・・スライドコア、１４・・・突き出しビン、１６・
・・可動型のスライドコア摺動面、１６ａ・・・外側エ
ツジ、Ｍ・・・成形品。 特　　許　　出　　願　　人 豊田合成株式会社Fig. 1 is a cutaway perspective view showing an example of an undercut molded product, Fig. 2 is a sectional view of main parts of a conventional mold (when closed), and Fig. 3 is a state in the middle of mold release of the mold shown in Fig. 2. FIG. 4 is a cross-sectional view of the main parts of the mold according to the embodiment of the present invention (when closed), and FIG. 5 is a cross-sectional view of the main parts of the mold shown in FIG. , FIG. 6 is a sectional view of a main part showing a state in which mold release is completed. l...Flat wall, 2...Ribbed hole (recess), 3...
・Side wall, 4... undercut protrusion, 5... hole (recess), 7... fixed type, 8... movable type, lO
...Slide core, 14...Ejection bottle, 16.
...Movable slide core sliding surface, 16a...outer edge, M...molded product. Patent application Toyoda Gosei Co., Ltd.

Claims (1)

【特許請求の範囲】 アンダーカット突起を有し平面壁及び側壁にそれぞれ金
型の可動型及びスライドコアで付形される凹部（孔部を
含む）を備えた成形品の成形に用いる金型において、 前記アンダーカット突起の成形品突き出し方向側面が斜
面となるように前記スライドコアのアンダーカット付形
面が形成されるとともに、成形品突き出し方向と対向す
る可動型のスライドコア摺動面のエツジがＲ仕上げ又は
面取りされていることを特徴とするアンダーカット成形
品用金型。[Scope of Claims] A mold used for molding a molded product having an undercut protrusion and having recesses (including holes) formed in a plane wall and a side wall by a movable die and a slide core of the die, respectively. The undercut shaped surface of the slide core is formed such that the side surface of the undercut protrusion in the molded product ejection direction is a slope, and the edge of the sliding surface of the movable slide core facing the molded product ejection direction is formed. A mold for an undercut molded product characterized by having an R finish or chamfering.
JP1648583A 1983-02-03 1983-02-03 Mold for molding item with undercut Granted JPS59142110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1648583A JPS59142110A (en) 1983-02-03 1983-02-03 Mold for molding item with undercut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1648583A JPS59142110A (en) 1983-02-03 1983-02-03 Mold for molding item with undercut

Publications (2)

Publication Number Publication Date
JPS59142110A true JPS59142110A (en) 1984-08-15
JPH0360647B2 JPH0360647B2 (en) 1991-09-17

Family

ID=11917579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1648583A Granted JPS59142110A (en) 1983-02-03 1983-02-03 Mold for molding item with undercut

Country Status (1)

Country Link
JP (1) JPS59142110A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6092819A (en) * 1983-10-27 1985-05-24 Matsushita Electric Ind Co Ltd Molding device
EP0243062A2 (en) * 1986-04-23 1987-10-28 Uponor Bv Heat weldable pipe fittings
JPS637919A (en) * 1986-06-27 1988-01-13 Matsushita Electric Ind Co Ltd Mold apparatus for molding resin
JPS63270115A (en) * 1987-04-30 1988-11-08 Yasuyuki Okaniwa Sliding device of mold unit
EP0328600A1 (en) * 1987-08-04 1989-08-23 Elconnex Pty. Limited Corrugated pipe connector
US5536463A (en) * 1994-08-19 1996-07-16 Del-Met Corporation System and method for molding plastic wheel covers
US5573383A (en) * 1994-03-16 1996-11-12 Nippondenso Co., Ltd. Blower assembly including casing housing a fan and a motor
WO2006117068A1 (en) * 2005-05-03 2006-11-09 Zimmermann Formenbau Gmbh Plastics injection mould
JP2007176481A (en) * 2005-12-22 2007-07-12 Valeo Systemes Thermiques Heating, ventilating or air-conditioning device for vehicle including detachable electric ventilating device
CN101961898A (en) * 2010-09-30 2011-02-02 凡嘉科技（无锡）有限公司 Internal line ejecting structure
CN102107499A (en) * 2009-12-28 2011-06-29 海尔集团公司 Injection mould provided wtih core-pulling mechanism driven by mould opening and closing actions
CN103862598A (en) * 2012-12-17 2014-06-18 汉达精密电子(昆山)有限公司 Sliding block mechanism of die
CN109940839A (en) * 2019-04-23 2019-06-28 东莞市真爱酷橡塑制品有限公司 A kind of mold produced with plug leather sheath

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201326U (en) * 1981-06-17 1982-12-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201326U (en) * 1981-06-17 1982-12-21

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6092819A (en) * 1983-10-27 1985-05-24 Matsushita Electric Ind Co Ltd Molding device
JPH0469052B2 (en) * 1983-10-27 1992-11-05 Matsushita Electric Ind Co Ltd
EP0243062A2 (en) * 1986-04-23 1987-10-28 Uponor Bv Heat weldable pipe fittings
JPS637919A (en) * 1986-06-27 1988-01-13 Matsushita Electric Ind Co Ltd Mold apparatus for molding resin
JPS63270115A (en) * 1987-04-30 1988-11-08 Yasuyuki Okaniwa Sliding device of mold unit
EP0328600A1 (en) * 1987-08-04 1989-08-23 Elconnex Pty. Limited Corrugated pipe connector
FR2646805A1 (en) * 1987-08-04 1990-11-16 Elconnex Pty Ltd Method of manufacturing a hollow plastic article provided with a hole
US5573383A (en) * 1994-03-16 1996-11-12 Nippondenso Co., Ltd. Blower assembly including casing housing a fan and a motor
US5536463A (en) * 1994-08-19 1996-07-16 Del-Met Corporation System and method for molding plastic wheel covers
WO2006117068A1 (en) * 2005-05-03 2006-11-09 Zimmermann Formenbau Gmbh Plastics injection mould
US7798807B2 (en) 2005-05-03 2010-09-21 Zimmermann Formenbau Gmbh Plastic injection mould tool
JP2007176481A (en) * 2005-12-22 2007-07-12 Valeo Systemes Thermiques Heating, ventilating or air-conditioning device for vehicle including detachable electric ventilating device
CN102107499A (en) * 2009-12-28 2011-06-29 海尔集团公司 Injection mould provided wtih core-pulling mechanism driven by mould opening and closing actions
CN101961898A (en) * 2010-09-30 2011-02-02 凡嘉科技（无锡）有限公司 Internal line ejecting structure
CN103862598A (en) * 2012-12-17 2014-06-18 汉达精密电子(昆山)有限公司 Sliding block mechanism of die
CN109940839A (en) * 2019-04-23 2019-06-28 东莞市真爱酷橡塑制品有限公司 A kind of mold produced with plug leather sheath

Also Published As

Publication number Publication date
JPH0360647B2 (en) 1991-09-17

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