JPH01210322A - Mold for injection molding - Google Patents
Mold for injection moldingInfo
- Publication number
- JPH01210322A JPH01210322A JP3708088A JP3708088A JPH01210322A JP H01210322 A JPH01210322 A JP H01210322A JP 3708088 A JP3708088 A JP 3708088A JP 3708088 A JP3708088 A JP 3708088A JP H01210322 A JPH01210322 A JP H01210322A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- gate part
- gate
- resin
- pressure
- 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
Links
- 238000001746 injection moulding Methods 0.000 title claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 9
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 230000000630 rising effect Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2703—Means for controlling the runner flow, e.g. runner switches, adjustable runners or gates
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ゲート部の断面積を可変とした射出成形金型
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an injection molding die in which the cross-sectional area of a gate portion is variable.
（従来の技術）
−Ｃの射出成形金型においては、第２図に示すように、
成形品の外観を損なうことがないよう、ランナ一部１と
キャビティ部２との間に小さな断面積を有するゲート部
３を設けている。(Prior art) In the injection molding mold of -C, as shown in Fig. 2,
A gate part 3 having a small cross-sectional area is provided between the runner part 1 and the cavity part 2 so as not to spoil the appearance of the molded product.
（発明が解決しようとする課題）
このような従来の金型では、充填中の圧力損失が、この
ゲート部３において大きくなり充填不良を起こす問題点
を有している。(Problems to be Solved by the Invention) Such conventional molds have a problem in that the pressure loss during filling becomes large at the gate portion 3, causing filling defects.
本発明は、以上のような点に鑑みて提案されたもので、
その目的とするところは、ゲート部に断面積調節機能を
設けることにより、この部分における圧力損失の上昇を
防いだ射出成形金型を提供することにある。The present invention was proposed in view of the above points, and
The purpose of this invention is to provide an injection mold that prevents an increase in pressure loss in this portion by providing a cross-sectional area adjustment function in the gate portion.
（課題を解決するための手段）
本発明は、金型内のゲート部に、ゲート部断面積を増減
するための可動式ピンを設けることによって上記目的を
達成している。(Means for Solving the Problems) The present invention achieves the above object by providing a movable pin in the gate portion in the mold for increasing or decreasing the cross-sectional area of the gate portion.
（作用）
ゲート部にその断面積を調節可能な可動式ピンを設け、
ゲート部に充填される樹脂の圧力に応じゲート部の断面
積を自動的に可変としてゲート部における圧力損失の上
昇を防止している。(Function) A movable pin that can adjust the cross-sectional area of the gate is provided,
The cross-sectional area of the gate section is automatically varied according to the pressure of the resin filled in the gate section, thereby preventing an increase in pressure loss at the gate section.
（実施例）
第１図は本発明の一実施例を示すもので、図中、１はラ
ンナ一部、２はキャビティ部、３はキャビティ部２七ラ
ンナ一部との間のゲート部である。(Embodiment) Fig. 1 shows an embodiment of the present invention, in which 1 is a part of the runner, 2 is a cavity part, and 3 is a gate part between the cavity part 2 and part of the runner. .
このゲート部３に、可動式のピン４を挿入し、その先端
をゲート部３内に突出自在とすべくピン４の他端側は金
型内に形成されたピン本体収納部に収納され、かつその
端部は圧縮状態にあるコイルバネ５に押し当てられてい
る。また、ピン４は段付き形状になっており膨設された
段部６の部分において位置決めされている。さらに、ゲ
ート部３に突き出しているピン４の先端はある勾配を有
する端面形状となっている。A movable pin 4 is inserted into the gate part 3, and the other end of the pin 4 is stored in a pin body storage part formed in the mold so that its tip can freely protrude into the gate part 3. Moreover, its end portion is pressed against the coil spring 5 which is in a compressed state. Further, the pin 4 has a stepped shape and is positioned at the expanded step portion 6. Further, the tip of the pin 4 protruding into the gate portion 3 has an end face shape having a certain slope.
このように構成されたゲート部３に樹脂が充填されると
、コイルバネ５が樹脂圧力によりさらに圧縮され、それ
にともないピン４が押し下げられゲート部３の断面積が
大きくなる。さらに、充填が完了すると樹脂圧が減少し
ピン４の位置はもと ゛にもどる。このように、樹脂の
充填圧を間接的に利用することにより、充填中のゲート
部３における圧力損失の上昇を防ぐことができる。When the gate portion 3 configured in this manner is filled with resin, the coil spring 5 is further compressed by the resin pressure, and the pin 4 is pushed down accordingly, increasing the cross-sectional area of the gate portion 3. Furthermore, when filling is completed, the resin pressure decreases and the pin 4 returns to its original position. In this way, by indirectly utilizing the filling pressure of the resin, it is possible to prevent an increase in pressure loss in the gate section 3 during filling.
（発明の効果）
以上のように本発明によれば、金型内のゲート部に、ゲ
ート部断面積を増減するための可動式ピンを設けたから
、充填中のゲート部における圧力損失の上昇を防止し、
充填不良を防ぎ得る効果がある。(Effects of the Invention) As described above, according to the present invention, since the movable pin for increasing/decreasing the cross-sectional area of the gate part is provided in the gate part in the mold, the increase in pressure loss in the gate part during filling can be prevented. prevent,
This has the effect of preventing filling defects.
“ 第１図は本発明の一実施例であって金型内におけ
るゲート部の断面図、第２図は従来例を示す。
■・・・ランナ一部、２・・・キャビティ部、３・・・
ゲート部、４・・・可動式ピン、５・・・コイルバネ、
６・・・段部" Fig. 1 shows an embodiment of the present invention, and is a cross-sectional view of the gate part in the mold, and Fig. 2 shows a conventional example. ■... Runner part, 2... Cavity part, 3...・・・
Gate part, 4... Movable pin, 5... Coil spring,
6...Dan section
Claims (1)
可動式ピンを設けたことを特徴とする射出成形金型。An injection molding mold characterized in that a movable pin for increasing or decreasing the cross-sectional area of the gate portion is provided in the gate portion within the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3708088A JPH01210322A (en) | 1988-02-19 | 1988-02-19 | Mold for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3708088A JPH01210322A (en) | 1988-02-19 | 1988-02-19 | Mold for injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01210322A true JPH01210322A (en) | 1989-08-23 |
Family
ID=12487573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3708088A Pending JPH01210322A (en) | 1988-02-19 | 1988-02-19 | Mold for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01210322A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0875354A1 (en) * | 1996-01-18 | 1998-11-04 | Hoya Corporation | Method of manufacturing lens, injection mold for molding of lens, and molded lens |
| JP2002337197A (en) * | 2000-12-22 | 2002-11-27 | Fuiisa Kk | In-mold gate opening/closing mechanism and injection molding die |
| ES2368044A1 (en) * | 2008-05-28 | 2011-11-14 | Comercial De Útiles Y Moldes S.A. | Regulating device of the hole of entry of material in molds of injection of plastic materials. (Machine-translation by Google Translate, not legally binding) |
| WO2016136861A1 (en) * | 2015-02-25 | 2016-09-01 | コニカミノルタ株式会社 | Molding device and molding method |
| FR3069181A1 (en) * | 2017-07-20 | 2019-01-25 | Delphi International Operations Luxembourg S.A R.L. | INJECTION DEVICE FOR MOLDING PIECES OF PLASTIC MATERIAL |
| CN112872314A (en) * | 2019-11-29 | 2021-06-01 | 贺利氏阿姆洛伊技术有限公司 | Injection molding system for injection molding amorphous metals |
-
1988
- 1988-02-19 JP JP3708088A patent/JPH01210322A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0875354A1 (en) * | 1996-01-18 | 1998-11-04 | Hoya Corporation | Method of manufacturing lens, injection mold for molding of lens, and molded lens |
| EP0875354A4 (en) * | 1996-01-18 | 2000-03-15 | Hoya Corp | Method of manufacturing lens, injection mold for molding of lens, and molded lens |
| JP2002337197A (en) * | 2000-12-22 | 2002-11-27 | Fuiisa Kk | In-mold gate opening/closing mechanism and injection molding die |
| ES2368044A1 (en) * | 2008-05-28 | 2011-11-14 | Comercial De Útiles Y Moldes S.A. | Regulating device of the hole of entry of material in molds of injection of plastic materials. (Machine-translation by Google Translate, not legally binding) |
| WO2016136861A1 (en) * | 2015-02-25 | 2016-09-01 | コニカミノルタ株式会社 | Molding device and molding method |
| FR3069181A1 (en) * | 2017-07-20 | 2019-01-25 | Delphi International Operations Luxembourg S.A R.L. | INJECTION DEVICE FOR MOLDING PIECES OF PLASTIC MATERIAL |
| CN112872314A (en) * | 2019-11-29 | 2021-06-01 | 贺利氏阿姆洛伊技术有限公司 | Injection molding system for injection molding amorphous metals |
| US11318649B2 (en) | 2019-11-29 | 2022-05-03 | Heraeus Amloy Technologies Gmbh | Injection molding system for the injection molding of amorphous metals |
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