JPH0360647B2 - - Google Patents
Info
- Publication number
- JPH0360647B2 JPH0360647B2 JP58016485A JP1648583A JPH0360647B2 JP H0360647 B2 JPH0360647 B2 JP H0360647B2 JP 58016485 A JP58016485 A JP 58016485A JP 1648583 A JP1648583 A JP 1648583A JP H0360647 B2 JPH0360647 B2 JP H0360647B2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- undercut
- mold
- side wall
- slide 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.)
- Expired - Lifetime
Links
- 238000000465 moulding Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は、平面壁凹部を備えた平面壁と、平
面壁の一端から略直交して突出する側壁とを備
え、側壁は自由端側に位置するアンダーカツト突
起と、該アンダーカツト突起より元部側に位置す
る側壁凹部とを具備する構成の成形品の成形に用
いる金型に関する。この明細書で、『凹部』は孔
部も含む意味である。DETAILED DESCRIPTION OF THE INVENTION The present invention includes a flat wall having a flat wall recess, a side wall protruding substantially perpendicularly from one end of the flat wall, and the side wall has an undercut protrusion located on the free end side; The present invention relates to a mold used for molding a molded product having a side wall recess located closer to the base than the undercut projection. In this specification, the term "recess" includes a hole.
上記種類の成形品Ｍとして、ここでは、第１図
に示すような、平面壁１にリブ付き孔（平面壁凹
部）２を備えるとともに、平面壁１の一端から略
直交して突出する側壁３には下端（自由端）にア
ンダーカツト突起４を、中間部に、即ち、アンド
ーカツト突起４より元部側にテーパ孔（側壁凹
部）５をそれぞれ備えた合成樹脂製のクーラーケ
ース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 the above type is provided with a ribbed hole (plane wall recess) 2 in a plane wall 1, and a side wall 3 protruding approximately perpendicularly from one end of the plane wall 1. The explanation will be given by taking as an example a synthetic resin cooler case that has an undercut protrusion 4 at the lower end (free end) and a tapered hole (side wall recess) 5 in the middle part, that is, closer to the base than the undercut protrusion 4. However, it 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、キヤビテイの大部分を固定型７
と可動型８とで形成する金型において、スライド
コア１０で側壁３のアンダーカツト突起４及びテ
ーパ孔５を付形し、また、平面壁１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。
ここで、スライドコア１０は、可動型８に形成品
突き出し方向と直交する方向で前進・後退可能に
保持されている。 Conventionally, the molding die for the molded product M shown in FIG.
As shown in the figure, most of the cavity is fixed type 7.
In a mold formed by a movable mold 8 and a slide core 10, the undercut protrusion 4 and the tapered hole 5 of the side wall 3 are shaped, and the ribbed hole 2 of the plane wall 1 is shaped by the movable mold 8. It is configured as follows.
Here, the slide core 10 is held by the movable mold 8 so as to be able to move forward and backward in a direction perpendicular to the direction in which the formed product is ejected.
この金型を用いて射出・トランスフアー等によ
り成形を完了後、型開き時に（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
た傾斜ブロツク１３の作用で後退し成形品のアン
ダーカツト突起４及びテーパ孔５におけるスライ
ドコア１０との係合は解除され、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、即ち、ス
ライドコア１０の突き出し方向側面が摺動する可
動型８のスライドコア摺動面１６の外側エツジ１
６ａに成形品のアンダーカツト突起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つた。 After completing molding by injection, transfer, etc. using this mold, 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, and the underside of the molded product is removed. The engagement of the cut protrusion 4 and the tapered hole 5 with the slide core 10 is released, and then the molded product M is ejected by the relative advancement of the ejector pin 14. The outer edge 1 of the slide core sliding surface 16 of the movable mold 8 that faces the molded product ejection direction, that is, the side surface of the slide core 10 in the ejection direction slides.
Since the undercut protrusion 4 of the molded product was engaged with the molded article 6a, mold release could not be performed reliably, and it was often necessary to complete the mold release with manual assistance.
この発明は、上記にかんがみて、アンダーカツ
トを有し、特定の凹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 provided with a specific recess.
この発明のアンダーカツト成形品用金型は、ス
ライドコアが取り付けられたものにおいて、アン
ダーカツト突起の成形品突き出し方向側面が側壁
内面に対して鈍角を形成する斜面となるようにス
ライドコアのアンダーカツト付形面を形成すると
ともに、スライドコアの成形品付き出し方向側面
が摺動する可動型のスライドコア摺動面の外側エ
ツジをＲ仕上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 of the slide core is arranged so that the side surface of the undercut protrusion in the molded product protrusion direction forms an obtuse angle with the inner surface of the side wall. The above object is achieved by forming a shaped surface and rounding or chamfering the outer edge of the sliding surface of the movable slide core on which the side surface of the slide core in the molded product delivery direction slides.
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ツト突起４の成形
品突き出し方向側面４ａが側壁内面に対して鈍角
を形成する斜面となるようにスライドコア１０の
アンダーカツト付形面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に外側エツ
ジ１６ａがＲ仕上げ又は面取りされている（第７
図参照）。このとき、アンダーカツト突起の成形
品突き出し方向側面４ａの斜面と側壁内面とがな
す角度（鈍角）は通常110〜120°とする。また上
記可動型のエツジ１６ａの仕上げはＲ（単位：mm）
は0.5〜1.0R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 slide core is arranged so that the side surface 4a of the undercut protrusion 4 of the molded product in the molded product protrusion direction forms an obtuse angle with the inner surface of the side wall. The undercut shaped surface 10a of 10 is formed by being cut obliquely, and the outer edge 16a of the slide core sliding surface 16 of the movable mold 8 facing the direction of ejecting the molded product is rounded or chamfered. 7
(see figure). At this time, the angle (obtuse angle) between the slope of the side surface 4a of the undercut projection in the molded product projecting direction and the inner surface of the side wall is usually 110 to 120 degrees. Also, the finish of the movable edge 16a is R (unit: mm)
should be 0.5 to 1.0R, and the chamfer angle should preferably be 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ツト突
起４の成形品突き出し方向側面４ａが側壁内面に
対して鈍角を形成する斜面とされ、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、
即ちアンダーカツト突起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
ンダーカツト突起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 protrusion 4 of the molded product in the molded product ejection direction is a slope forming an obtuse angle with respect to the inner surface of the side wall, and the slide core sliding surface facing the molded product ejection direction,
That is, since the edge 16a of the surface facing the undercut projection 4 is rounded or chamfered, the undercut projection 4 slides on the edge 16a of the movable mold 8 as shown in FIG. 5, and the molded product M is pushed out. As shown in FIG. 6, the mold release is surely completed and the mold automatically falls from the mold.
なお、上記成形品における各孔２，５は、開口
していない凹部としてもよい。 In addition, each hole 2, 5 in the said molded article may be a recessed part which is not open.
この発明のアンダーカツト成形品金型は、上記
のような構成なので、アンダーカツトを有し、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 undercut molded product mold 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.
第１図はアンダーカツ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、
第７図は同じく可動型のスライドコア摺動面の外
側エツジの形状を示すための要部拡大図である。
１……平面壁、２……リブ付き孔（凹部）、３
……側壁、４……アンダーカツト突起、５……テ
ーパ孔（凹部）、７……固定型、８……可動型、
１０……スライドコア、１４……突き出しピン、
１６……可動型のスライドコア摺動面、１６ａ…
…外側エツジ、Ｍ……成形品。
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 cross-sectional view of the main parts showing the completed state of mold release,
FIG. 7 is an enlarged view of the main part showing the shape of the outer edge of the sliding surface of the slide core of the same movable type. 1...Flat wall, 2...Ribbed hole (recess), 3
... Side wall, 4 ... Undercut projection, 5 ... Tapered hole (recess), 7 ... Fixed type, 8 ... Movable type,
10...Slide core, 14...Eject pin,
16...Movable slide core sliding surface, 16a...
...Outer edge, M...molded product.
Claims (1)
端から略直交して突出する側壁とを備え、該側壁
は自由端側に位置するアンダーカツト突起と、該
アンダーカツト突起より元部側に位置する側壁凹
部とを具備する構成の成形品の成形に用いる金型
であつて、 前記平面壁凹部を付形する可動型と、前記側壁
のアンダーカツト突起の成形品突き出し方向側面
及び前記側壁凹部を付形するスライドコアとを備
え、該スライドアは前記可動型に成形品突き出し
方向と直交する方向で前進・後退可能に保持され
ている構成のアンダーカツト成形品用金型におい
て、 前記アンダーカツト突起の成形品突き出し方向
側面が前記側壁内面に対して鈍角を形成する斜面
となるように前記スライドコアのアンダーカツト
付形面が形成されるとともに、 前記スライドコアの成形品突き出し方向側面が
摺動する、可動型のスライドコア摺動面の外側エ
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ツト成形品用金型。[Scope of Claims] 1. A flat wall having a flat wall recess, and a side wall projecting substantially orthogonally from one end of the flat wall, the side wall having an undercut protrusion located on the free end side, and an undercut projection located on the free end side. A mold used for molding a molded product having a side wall recess located on the base side from the cut protrusion, the molded product having a movable mold for shaping the plane wall recess and an undercut protrusion on the side wall. A slide core for shaping the side wall in the ejection direction and the side wall recess, the slider being held in the movable mold so as to be movable forward and backward in a direction perpendicular to the ejection direction of the molded product. In the mold, 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 forms an obtuse angle with respect to the inner surface of the side wall, and the slide core is molded. A mold for an undercut molded product, characterized in that the outer edge of the sliding surface of a movable slide core on which the side surface in the product ejection direction slides is rounded or chamfered.
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 JPS59142110A (en) | 1984-08-15 |
| JPH0360647B2 true 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) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092819A (en) * | 1983-10-27 | 1985-05-24 | Matsushita Electric Ind Co Ltd | Molding device |
| GB2189737A (en) * | 1986-04-23 | 1987-11-04 | Du Pont | 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 |
| CA1310283C (en) * | 1987-08-04 | 1992-11-17 | John Petty | Corrugated pipe connector |
| JP3498347B2 (en) * | 1994-03-16 | 2004-02-16 | 株式会社デンソー | Blower |
| US5536463A (en) * | 1994-08-19 | 1996-07-16 | Del-Met Corporation | System and method for molding plastic wheel covers |
| DE102005021351B4 (en) | 2005-05-03 | 2008-09-18 | Zimmermann Formenbau Gmbh | Plastic injection mold |
| FR2895316B1 (en) * | 2005-12-22 | 2010-08-20 | Valeo Systemes Thermiques | DEVICE FOR HEATING, VENTILATION AND / OR AIR CONDITIONING OF A VEHICLE COMPRISING A REMOVABLE MOTORBIKE GROUP |
| CN102107499B (en) * | 2009-12-28 | 2013-07-03 | 海尔集团公司 | Injection mould provided with 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 |
| CN109940839B (en) * | 2019-04-23 | 2024-05-28 | 东莞市真爱酷橡塑制品有限公司 | Mould for producing leather sheath with plug |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597056Y2 (en) * | 1981-06-17 | 1984-03-05 | 株式会社 積水工機製作所 | Synthetic resin mold |
-
1983
- 1983-02-03 JP JP1648583A patent/JPS59142110A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59142110A (en) | 1984-08-15 |
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