JPH0436899Y2 - - Google Patents
Info
- Publication number
- JPH0436899Y2 JPH0436899Y2 JP1987199453U JP19945387U JPH0436899Y2 JP H0436899 Y2 JPH0436899 Y2 JP H0436899Y2 JP 1987199453 U JP1987199453 U JP 1987199453U JP 19945387 U JP19945387 U JP 19945387U JP H0436899 Y2 JPH0436899 Y2 JP H0436899Y2
- Authority
- JP
- Japan
- Prior art keywords
- ejector pin
- mold
- molded product
- cross
- sectional shape
- 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
Links
- 238000000465 moulding Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、射出成形金型に関し、特に成形品の
突き出しピンの部分の構造に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an injection mold, and particularly to the structure of an ejector pin portion of a molded product.
従来の技術
射出成形金型は、第２図に示すように、固定側
金型１と可動側金型２から構成されており、成形
品の突き出しピン３は、固定側金型１の部材を貫
通して、その先端がキヤビテイ４の底面に至つて
いる。突き出しピン３は、第３図に示すように、
その断面形状が円形であり、その先端はキヤビテ
イ４の底面と同一面となつている。BACKGROUND TECHNOLOGY As shown in FIG. 2, an injection mold is composed of a fixed mold 1 and a movable mold 2, and the ejecting pin 3 of the molded product is inserted into the fixed mold 1. It passes through and its tip reaches the bottom surface of the cavity 4. As shown in FIG. 3, the ejector pin 3 is
Its cross-sectional shape is circular, and its tip is flush with the bottom surface of the cavity 4.
考案が解決しようとする問題点
上記金型においては、成形後に金型を開いたと
き、成形品がキヤビテイ４に残らず可動側金型２
に付着して取出されてしまうことがあり、成形品
の自動取出しを困難にしている。また、突き出し
ピン３を突出させキヤビテイ４内の成形品を突き
出すとき、振動によつて突き出しピン３が若干回
転して、成形品の横ずれを生じたり、複数の突き
出しピンの一部が成形品に当接せず成形品の歪み
を生じることがあつた。Problems to be solved by the invention In the above mold, when the mold is opened after molding, the molded product does not remain in the cavity 4 and the movable mold 2
This makes automatic removal of the molded product difficult. Furthermore, when the ejector pin 3 is ejected to eject the molded product in the cavity 4, the ejector pin 3 may rotate slightly due to vibration, causing the molded product to shift laterally, or some of the ejector pins may be partially attached to the molded product. There were cases where the molded product was distorted due to lack of contact.
本考案は、金型を開いたとき成形品が確実にキ
ヤビテイ内に残り、突き出しピンによつて成形品
の取出しを良好に行なえる射出成型金型を提供す
ることを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide an injection molding die from which a molded article remains in the cavity when the mold is opened, and from which the molded article can be taken out with ease using an ejector pin.
問題点を解決するための手段
上記目的を達成するために、本考案は、第２図
で説明したような射出成形金型において、突き出
しピン３の金形部材を貫通する部分の横断面形状
を角のある形状とする。例えば、第１図ａに示す
ように三角形としり、同ｂに示すように四角形と
する。そして、突き出しピン３が貫通する金型部
材の貫通穴断面形状を突き出しピン横断面形状と
嵌合する形状とする。さらに、突き出しピン３の
先端を、成形時においてキヤビテイ４の底面から
若干突出させたものである。突出高さは0.1〜0.2
mmの範囲が好ましい。Means for Solving the Problems In order to achieve the above object, the present invention provides an injection mold as explained in FIG. It should have an angular shape. For example, as shown in FIG. 1A, it is made into a triangle, and as shown in FIG. 1B, it is made into a quadrilateral. Then, the cross-sectional shape of the through hole of the mold member through which the ejector pin 3 passes is made into a shape that fits with the cross-sectional shape of the ejector pin. Furthermore, the tip of the ejector pin 3 is made to slightly protrude from the bottom surface of the cavity 4 during molding. Protrusion height is 0.1~0.2
A range of mm is preferred.
作 用
本考案は、角のある横断面形状の突き出しピン
を、これと嵌合する断面形状の金型部材貫通穴に
通して作動させるので突き出しピンの回転はなく
なる。また、突き出しピン先端は、金型底面が若
干突出しているので、この部分を成形収縮した樹
脂が包み込み保持する。Function The present invention operates by passing an ejector pin having an angular cross-sectional shape through a through-hole of a mold member having a cross-sectional shape that fits therewith, so that the ejector pin does not rotate. Furthermore, since the tip of the ejector pin slightly protrudes from the bottom of the mold, this portion is wrapped and held by the resin that has contracted during molding.
考案の効果
以上の結果、本考案は、突き出しピンの作動時
の回転を防止して成形品突き出し時の成形品の横
ずれ、歪を防止できる。また、突き出しピンの先
端を樹脂が包み込むことによつて、金型を開いた
ときに成形品をキヤビテイ内に確実に残るようし
て、突き出しピンによる成形品の良好な取出しを
できる。Effects of the Invention As a result of the above, the present invention can prevent the ejector pin from rotating during operation, thereby preventing lateral displacement and distortion of the molded product when ejecting the molded product. Furthermore, by wrapping the tip of the ejector pin in the resin, the molded product can be reliably left in the cavity when the mold is opened, allowing the ejector pin to take out the molded product in a good manner.
第１図はabはそれぞれ本考案に用いる突き出
しピンの側面図と横断面図、第２図は射出成形金
型の説明図、第３図は従来の射出成形金型におけ
る突き出しピンの側面図と断面図である。
In Fig. 1, ab is a side view and a cross-sectional view of the ejector pin used in the present invention, Fig. 2 is an explanatory diagram of an injection mold, and Fig. 3 is a side view of the ejector pin in a conventional injection mold. FIG.
Claims (1)
テイ底面に至る成形品の突き出しピンの横断面形
状を角のある形状となし、該突き出しピンが貫通
する金型部材の貫通穴断面形状を前記突き出しピ
ンの横断面形状と嵌合する形状となし、突き出し
ピンの先端は成形時においてキヤビテイ底面より
若干突出していることを特徴とする射出成形金
型。 The cross-sectional shape of the ejector pin of the molded product that penetrates the mold member and whose tip reaches the bottom surface of the cavity of the mold is an angular shape, and the cross-sectional shape of the through hole of the mold member through which the ejector pin penetrates is An injection molding mold characterized in that the ejector pin has a shape that fits with the cross-sectional shape of the ejector pin, and the tip of the ejector pin slightly protrudes from the bottom surface of the cavity during molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987199453U JPH0436899Y2 (en) | 1987-12-28 | 1987-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987199453U JPH0436899Y2 (en) | 1987-12-28 | 1987-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101823U JPH01101823U (en) | 1989-07-10 |
| JPH0436899Y2 true JPH0436899Y2 (en) | 1992-08-31 |
Family
ID=31489902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987199453U Expired JPH0436899Y2 (en) | 1987-12-28 | 1987-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436899Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202013000173U1 (en) * | 2013-01-07 | 2013-05-27 | Herbert Bübel | T-or. Cross ejector for pressure and injection molds |
| CN112371946B (en) * | 2020-10-20 | 2021-10-15 | 苏州恒荣精密机电有限公司 | Thin-wall part die |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213618B2 (en) * | 1979-09-28 | 1987-03-27 | Sumitomo Electric Industries | |
| JPS6213617B2 (en) * | 1979-09-28 | 1987-03-27 | Sumitomo Electric Industries |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226659Y2 (en) * | 1985-07-11 | 1990-07-19 | ||
| JPH028739Y2 (en) * | 1985-07-11 | 1990-03-02 |
-
1987
- 1987-12-28 JP JP1987199453U patent/JPH0436899Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213618B2 (en) * | 1979-09-28 | 1987-03-27 | Sumitomo Electric Industries | |
| JPS6213617B2 (en) * | 1979-09-28 | 1987-03-27 | Sumitomo Electric Industries |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01101823U (en) | 1989-07-10 |
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