JP3636574B2 - Injection mold - Google Patents
Injection mold Download PDFInfo
- Publication number
- JP3636574B2 JP3636574B2 JP21193997A JP21193997A JP3636574B2 JP 3636574 B2 JP3636574 B2 JP 3636574B2 JP 21193997 A JP21193997 A JP 21193997A JP 21193997 A JP21193997 A JP 21193997A JP 3636574 B2 JP3636574 B2 JP 3636574B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- entrance
- frame
- held
- movable mold
- 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 - Fee Related
Links
Images
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、サブマリンゲートを有する入駒の取付構造に特徴を有する射出成形金型に関する。
【０００２】
【従来の技術】
樹脂の射出成形金型においてサブマリンゲート（トンネルゲート）方式のものがある。従来のサブマリンゲートとして下型に一体的に形成したタイプやサブマリンゲートを備えた入子（入駒）タイプのものが知られている。サブマリンゲートを下型に一体的に形成したタイプでは、ゲートの切刃部の摩耗、変形、欠損などの修理が困難である。この点、入子（入駒）方式のサブマリンゲートは、これらの修理は容易となる。従来の入子（入駒）タイプとしては、実開平６−６８８１１号に開示されるような切刃部とゲート本体部とを別体としたものが知られている。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来知られている入駒方式は、切刃部とゲート本体部とを分割した上記の入駒方式も含め、入駒自体は下型に形成された凹部に設置される構造であるため、成形時に駒上部と上型との間に樹脂から張り出した場合などに入駒が破損するという問題が生じる。これは入駒底部が下型で閉塞されているため、上記のように入駒と上型との間にバリが発生すれば型閉めの際異常な力が駒にかかるためである。とくに図５に示すように入駒が上型に突出した形状の場合においてこの問題はより顕著であり、図５に示すようなクラックが発生する。サブマリンゲートを備えた入駒はいうまでもなく、精密部品であり、製作にも時間がかかる。本発明は、このような重要部品である入駒自体の損傷を防ぐ新規な金型構造を提供することを目的とするものである。
【０００４】
【課題を解決するための手段】
本発明者は、上記課題を解決するため、鋭意検討した結果、駒を設置する型への取付け構造を工夫し、異常な力が駒にかかった際にはその取付部を破壊し、駒自体は型から脱落できるような構造を採用することにより、異常時における入駒の損傷を防止することができることを見出し、本発明に至った。
【０００５】
すなわち、本発明は、
（１）キャビティを形成する固定型と可動型と、該可動型に保持された前記キャビティ内に溶融樹脂を導入するサブマリンゲートを有する入駒とからなる射出成形金型であって、前記可動型に保持された入駒は、平常時な可動型の所定位置に保持されるが、成形時異常な力が入駒に負荷されたときは、可動型下部に設けた空間に脱落するように可動型に保持されることを特徴とする射出成形金型、
（２）入駒が固定型に向かって突出した形状を有する前記（１）記載の射出成形金型、
に関する。
【０００６】
【発明の実施の形態】
次に図面に基づき本発明の実施例を説明する。
【０００７】
図１は本発明に係る射出成形金型断面説明図である。また、図２は図１上矢視Ｖの断面説明図である。図１、２中、１は固定型、２は入駒を取付ける可動型、３は可動型２を支持するバックプレート、４は金型キャビティ、５は入駒、６は入駒内に設けたサブマリンゲート、７は入駒を可動型に取付ける取付け具、８は可動型の入駒取付け部後方に設けた空間部、９は成形中に発生した入駒上部と固定型との間のバリを示す。図３は入駒の説明図である。図５は従来の入駒取付け構造の説明図で入駒５は、下型（可動型）によって底部が閉鎖されている。このため入駒上部にバリが発生したとき型閉めにより異常な力が入駒にかかりクラックが発生する。
【０００８】
しかし、本発明においては、図１、２に示すように入駒をその取付け部が空間に面するように取付け、しかもその取付けは正常時は入駒を確実に保持できるように、かつ異常な力が入駒に負荷されたときは入駒が破損しないように、取付け部のほうが破壊するように調整されるので、入駒上部にバリが発生するような異常が生じても入駒は破損することなく、取付けられた可動型からその下部の空間へと脱落することができる。こうして本発明の入駒取付け構造によれば、入駒の破損を防止することができる。なお、本発明においては駒の構造はとくに制限されないが、図１、２に示すような上型に突出した構造のものがとくに損傷を受け易いので、このような構造に適用した場合において、本発明の効果はより顕著である。
【０００９】
本発明の入駒の取付けは、上記のように正常時においては入駒を確実に固定でき、異常時においては取付部が破壊されるものであり、このような作用が発現できるものであれば、その取付け手段は制限されない。しかしボルト締めが実際的で好ましい。たとえば２本のＭ３ボルトを用い、所定の値で破断するものでよい（図４）。また、ボルトに弱部となる切欠きを設けてもよい。
【００１０】
標準部品のボルトを破損させることで、精密部品の入駒を保護することができる。破損させたボルトの交換は入駒のつくり直しに比べればはるかに低コストでかつ容易である。
【００１１】
【発明の効果】
以上説明したように、本発明の射出成形金型は、入駒の取付け部が空間に面した金型の外側にあり、しかもその取付けは正常時は入駒を確実に保持するように、かつ異常時は入駒が金型から脱落できるようにされているので、異常時の入駒自体の破損を防ぐことができる。
【図面の簡単な説明】
【図１】本発明の射出成形金型の断面説明図。
【図２】図１における矢視Ｖよりの断面説明図。
【図３】入駒の一例の説明図。
【図４】入駒の取付け例説明図。
【図５】従来の入駒取付け構造の説明図。
【符号の説明】
１ 固定型
２ 入駒を固定する可動型
３ バックプレート
４ キャビティ
５ 入駒
６ サブマリンゲート
７ 入駒取付け具
８ 空間部
９ バリ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection mold having a feature in a mounting structure for a slot having a submarine gate.
[0002]
[Prior art]
There is a submarine gate (tunnel gate) type of resin injection mold. As a conventional submarine gate, a type integrally formed with a lower mold and a nested type having a submarine gate are known. In the type in which the submarine gate is integrally formed with the lower mold, it is difficult to repair the wear, deformation, or breakage of the cutting edge of the gate. In this respect, the submarine gate of the nesting (entrance piece) system can be easily repaired. As a conventional nesting type, there is known a type in which a cutting edge part and a gate body part as disclosed in Japanese Utility Model Publication No. 6-68811 are separated.
[0003]
[Problems to be solved by the invention]
However, the conventional entrance frame method includes the above-described entrance frame method in which the cutting edge portion and the gate main body portion are divided, so that the entrance frame itself is installed in a recess formed in the lower mold. There is a problem that the entrance frame is damaged when it protrudes from the resin between the upper part of the piece and the upper die at the time of molding. This is because the bottom of the entrance frame is closed by the lower mold, and if a burr occurs between the entrance frame and the upper mold as described above, an abnormal force is applied to the frame when closing the mold. In particular, this problem is more conspicuous when the entrance frame has a shape protruding into the upper die as shown in FIG. 5, and a crack as shown in FIG. 5 occurs. Needless to say, the entrance with a submarine gate is a precision part and takes time to manufacture. An object of the present invention is to provide a novel mold structure which prevents damage to the entrance frame itself which is such an important part.
[0004]
[Means for Solving the Problems]
As a result of diligent investigations to solve the above problems, the present inventor devised a structure for mounting a piece on which a piece is installed, and when an abnormal force is applied to the piece, the attachment portion is destroyed and the piece itself It has been found that by adopting a structure that can be removed from the mold, it is possible to prevent damage to the entrance frame in the event of an abnormality.
[0005]
That is, the present invention
(1) An injection mold comprising a fixed mold and a movable mold for forming a cavity, and an entrance piece having a submarine gate for introducing a molten resin into the cavity held by the movable mold, wherein the movable mold The entrance frame held in the normal position is held at a predetermined position on the movable mold, but when an abnormal force is applied to the entrance frame during molding, it moves so that it drops into the space provided at the bottom of the movable mold. Injection mold characterized by being held in the mold,
(2) The injection mold according to (1), wherein the entrance piece has a shape protruding toward the fixed mold,
About.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0007]
FIG. 1 is a cross-sectional explanatory view of an injection mold according to the present invention. FIG. 2 is an explanatory cross-sectional view taken along the arrow V in FIG. 1 and 2, 1 is a fixed mold, 2 is a movable mold for mounting a frame, 3 is a back plate for supporting the
[0008]
However, in the present invention, as shown in FIGS. 1 and 2, the entrance frame is mounted so that the mounting portion faces the space, and the mounting is normal so that the entrance frame can be securely held and is abnormal. When the force is applied to the entrance frame, the mounting part is adjusted to break so that the entrance frame will not be damaged. It is possible to drop from the attached movable mold to the space below it. Thus, according to the entrance frame mounting structure of the present invention, it is possible to prevent the entrance frame from being damaged. In the present invention, the structure of the piece is not particularly limited. However, the structure protruding in the upper mold as shown in FIGS. 1 and 2 is particularly susceptible to damage. The effect of is more remarkable.
[0009]
As described above, the installation of the entrance piece of the present invention can reliably fix the entrance piece in the normal state, the attachment portion is destroyed in the abnormal state, and if such an action can be expressed, The attachment means is not limited. However, bolting is practical and preferred. For example, two M3 bolts may be used and fractured at a predetermined value (FIG. 4). Moreover, you may provide the notch used as a weak part in a volt | bolt.
[0010]
By damaging the bolt of the standard part, it is possible to protect the entrance of the precision part. Replacing a damaged bolt is much cheaper and easier than remaking a piece.
[0011]
【The invention's effect】
As described above, the injection mold according to the present invention is such that the mounting part of the entrance piece is outside the mold facing the space, and the attachment is surely held in the normal state and abnormal. Since the entrance piece can be removed from the mold at the time, it is possible to prevent the entrance piece itself from being damaged in the event of an abnormality.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of an injection mold according to the present invention.
FIG. 2 is a cross-sectional explanatory view taken from an arrow V in FIG.
FIG. 3 is an explanatory diagram of an example of an entry frame.
FIG. 4 is an explanatory diagram of a mounting example of an entrance frame.
FIG. 5 is an explanatory diagram of a conventional entrance frame mounting structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed type |
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21193997A JP3636574B2 (en) | 1997-08-06 | 1997-08-06 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21193997A JP3636574B2 (en) | 1997-08-06 | 1997-08-06 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1148289A JPH1148289A (en) | 1999-02-23 |
| JP3636574B2 true JP3636574B2 (en) | 2005-04-06 |
Family
ID=16614198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21193997A Expired - Fee Related JP3636574B2 (en) | 1997-08-06 | 1997-08-06 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3636574B2 (en) |
-
1997
- 1997-08-06 JP JP21193997A patent/JP3636574B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1148289A (en) | 1999-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3636574B2 (en) | Injection mold | |
| EP2253447A1 (en) | Metal mold for injection molding of framed glass and manufacturing method for framed glass | |
| KR200418301Y1 (en) | Injection molding machine | |
| US5555604A (en) | Handle fastening on a utensil, for example a cooking utensil | |
| JPH03234608A (en) | Mold having sensor for detecting crack of plate glass | |
| CN117337256A (en) | Fixing device for fixing a sensor with planned fracture | |
| GB2392643A (en) | Moulded product comprising insert | |
| JP4690773B2 (en) | Manufacturing method of mounting bracket | |
| KR19990019364U (en) | Core Pin Installation Structure of Injection Mold | |
| CN216683148U (en) | Mould with protection hot runner interface function | |
| JP3632545B2 (en) | Mold for molding | |
| US6828917B2 (en) | Alarm system for casting mold | |
| KR200283847Y1 (en) | Inside cast being changable | |
| KR200144524Y1 (en) | Injection mold | |
| KR100633908B1 (en) | Spark plug core pin of metallic mould for cylinder head | |
| KR200262983Y1 (en) | Garnish for the lower part from the door of the car | |
| KR100330898B1 (en) | A vent valve unit of die casting mold | |
| KR0126478Y1 (en) | Three-side bending structure of sequential transfer mold | |
| JP2731770B2 (en) | Molding machine | |
| KR200407532Y1 (en) | Block structure of mold with separating core | |
| KR0138007Y1 (en) | A structure for supporting a room mirror of an automobile | |
| JPS63296256A (en) | Manufacture of resin sealed semiconductor device | |
| JPH0234088Y2 (en) | ||
| KR100290259B1 (en) | Wheel house arch molding of vehicle | |
| KR19990018773U (en) | Breakage prevention structure of core pin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20041126 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050104 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050105 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080114 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110114 Year of fee payment: 6 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110114 Year of fee payment: 6 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |