JPH04201426A - Mold for injection molding and molded item - Google Patents
Mold for injection molding and molded itemInfo
- Publication number
- JPH04201426A JPH04201426A JP33523690A JP33523690A JPH04201426A JP H04201426 A JPH04201426 A JP H04201426A JP 33523690 A JP33523690 A JP 33523690A JP 33523690 A JP33523690 A JP 33523690A JP H04201426 A JPH04201426 A JP H04201426A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- core
- slide core
- submarine gate
- runner
- 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 1
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005336 cracking Methods 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
-
- 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
- B29C45/38—Cutting-off equipment for sprues or ingates
-
- 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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は射出成形用金型におけるゲート方式に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gate system in an injection mold.
従来用いられているサブマリンゲートは第５図のように
金型パーティング面に設けたランナーから製品部に向か
って斜めに設け、円錐形状を成している。As shown in FIG. 5, a conventional submarine gate is provided obliquely from a runner provided on a mold parting surface toward a product part, and has a conical shape.
上記従来技術はサブマリンゲート部がアンダーカットに
なるため、ＧＦ’スチロールなどのように割れやすい樹
脂を用いるゲート部が欠けやすく、金型内に欠けた樹脂
のカスが残留することがあり、ゲートづまりとなりショ
ートショットや外観不良になりやすかった。In the above conventional technology, the submarine gate part is undercut, so the gate part, which uses easily breakable resin such as GF' styrene, is prone to chipping, and chipped resin residue may remain in the mold, resulting in gate clogging. This resulted in short shots and poor appearance.
本発明はサブマリンゲートを無理なく抜き、金型内から
スムーズに排除することを目的としている。さらにゲー
ト形状を変える事により、成形性の向上をはかる事を目
的としている。The object of the present invention is to easily pull out the submarine gate and smoothly remove it from the mold. Furthermore, by changing the gate shape, the aim is to improve formability.
１、ホットランナ−とコールドランナーを併用して金型
から排除しなければならないランナーをれさくした。（
多点ゲートを用いてもそれぞれのコールドランナーは別
々に分離するようにした）２、コールドランナーをスラ
イドコアに設け、スライドコアの動作によりサブマリン
ゲートと製品部を切断しコア内に設けたサブマリンゲー
トを無理なく抜ける構造にした。1. A hot runner and a cold runner were used together to remove the runner that had to be removed from the mold. (
(Even if a multi-point gate is used, each cold runner is separated separately.) 2. The cold runner is installed in the slide core, and the submarine gate and the product part are cut off by the movement of the slide core, and the submarine gate is installed in the core. It has a structure that allows it to pass through easily.
成形品とサブマリンゲートは、成形品突出し時に角ビン
により切断分離される。次にスライドコア作動ピンによ
りスライドコアは後退し、コアに設けられたサブマリン
ゲートはコアからランナーが突出され金型外へ排除され
る。The molded product and submarine gate are cut and separated by a square bottle when the molded product is ejected. Next, the slide core is moved backward by the slide core operating pin, and the submarine gate provided in the core is ejected from the mold by a runner protruding from the core.
成形品とゲートを切断分離したあとスライドコアにより
サブマリンゲートを抜くので、ゲート部には全く無理な
力は作用しない。従ってゲートが変形して欠ける心配が
なく安定した成形が行えるものである。After cutting and separating the molded product and gate, the submarine gate is pulled out using the slide core, so no excessive force is applied to the gate. Therefore, stable molding can be performed without worrying about the gate being deformed or chipped.
［実施例〕
以下、本発明の一実施例を第１図から第４回により説明
する。[Example] An example of the present invention will be described below with reference to FIGS. 1 to 4.
第１図は型締め状態を示している。ホットライナー７か
らコールドランナー４に、サブマリンゲート５を通って
キャビティ部に樹脂が充填され、成形品１を得るもので
ある。コールドランナー４はスライドコア３に、サブマ
リンゲートはコアに設けである。成形時、射田圧により
スライドコア３をブロックしである。FIG. 1 shows the mold clamped state. A molded product 1 is obtained by filling a cavity with resin from a hot liner 7 to a cold runner 4 through a submarine gate 5. The cold runner 4 is provided on the slide core 3, and the submarine gate is provided on the core. During molding, the slide core 3 is blocked by shota pressure.
第２図は樹脂充填、冷却完了後に、成形品１を突出し量
Ｌ′突出した状態である。この間で成形品１とサブマリ
ンゲート５は角ピン８により切断分離する。スライドコ
ア３とスライド作動用ピン１２との隙間はＬはＬ）Ｌ’
とする事により、角ピン８によりゲートを切断した後
、スライドコア３が後退する事になる。FIG. 2 shows a state in which the molded product 1 is protruded by an amount L' after resin filling and cooling are completed. During this time, the molded product 1 and the submarine gate 5 are cut and separated by the square pin 8. The gap between the slide core 3 and the slide operating pin 12 is L)L'
By doing so, after the gate is cut by the square pin 8, the slide core 3 is moved back.
第３図は成形品１を十分に突出した状態を示した。スラ
イドコア作動用ピン１２によりスライドコア３は後退完
了する。サブマリンゲート５はコア２から無理なく完全
に抜ける。FIG. 3 shows a state in which the molded article 1 is fully protruded. The slide core 3 completes its retreat by the slide core operating pin 12. Submarine Gate 5 can be easily and completely passed through Core 2.
第４図は突出し完了を示した状態である。突出しピン１
１によりランナー突出し９を突出し、コールドランナー
４をスライドコア３から突出しするものである。FIG. 4 shows a state in which ejection is completed. Ejecting pin 1
1 causes the runner protrusion 9 to protrude, and the cold runner 4 to protrude from the slide core 3.
成形品１を取出し、コールドランナー４を自重落下させ
るなどして次の成形サイクルに移行する。The molded product 1 is taken out, the cold runner 4 is allowed to fall under its own weight, and the next molding cycle is started.
再び型締めを開始すると、各突出しピンは戻り、スライ
ドコア３は圧力受け６により前進限界でブロックされ、
ランナー突出し９はバネ１０の力で押し戻される。When mold clamping is started again, each ejecting pin returns and the slide core 3 is blocked at its forward limit by the pressure receiver 6.
The runner protrusion 9 is pushed back by the force of the spring 10.
本実施例によればサブマリンゲートを無理なく抜く事が
でき、ＧＰスチロールなどのように割れやすい樹脂で成
形してもゲート部が欠ける心配がなく安定した成形を行
うことができる。According to this embodiment, the submarine gate can be pulled out without any difficulty, and even when molded with easily breakable resin such as GP styrene, stable molding can be performed without fear of chipping of the gate portion.
本発明は以上説明したように構成されているので以下に
記載されるような効果がある。Since the present invention is configured as described above, it has the following effects.
１、サブマリンゲートをスライド２Ｐで抜くので、ゲー
ト部の割れや欠けを防ぐ事ができ、安定した成形を行う
事ができる。1. Since the submarine gate is pulled out with the slide 2P, cracking and chipping of the gate part can be prevented and stable molding can be performed.
２、ゲート部の抜けの心配がないので、サブマリンゲー
ト形状を丸断面だけでなく、長方形、楕円形、小判形な
どのように細長い形状にすることができ、ゲート部で樹
脂の流動を拡散させることができる。2. Since there is no need to worry about the gate part coming off, the shape of the submarine gate can be made into elongated shapes such as rectangles, ellipses, oval shapes, etc. in addition to round cross sections, and the flow of resin is diffused at the gate part. be able to.
第１図から第４図は本発明の一実施例の各動作における
縦断面図である。
第１図・・・本発明金型における型締め状態での断面図
。
第２図・・・その突出し開始時の断面図。
第３図・・・その突出し時の断面図。
第４図・・・その突出し完了時の断面図。
第５図は従来のサブマリンゲート構造の縦断面である。
１・・・成形品、２・・・コア、３・・・スライドコア
、４・・・コールドランナー、５・・・サブマリン、６
・・・圧力受け、７・・・ホットランナ−１８・・・角
ピン、９・・・ランナー突出し、１０・・・バネ、１１
・・・突出ピン、１２・・・スライドコア作動用ピン1 to 4 are longitudinal cross-sectional views of each operation of an embodiment of the present invention. FIG. 1: A sectional view of the mold of the present invention in a clamped state. Fig. 2: A sectional view at the start of protrusion. Fig. 3: A sectional view when it is protruded. Fig. 4: A sectional view when the ejection is completed. FIG. 5 is a longitudinal section of a conventional submarine gate structure. 1... Molded product, 2... Core, 3... Slide core, 4... Cold runner, 5... Submarine, 6
...Pressure receiver, 7...Hot runner-18...Square pin, 9...Runner protrusion, 10...Spring, 11
...Protruding pin, 12...Slide core operation pin
Claims (1)
ブマリンゲートを設けたことを特徴とする、ホットラン
ナーとコールドランナーを併用した射出成形用金型。 ２、サブマリンゲート形状が長方形、楕円形、小判形な
どのように細長い形状を有することを特徴とした成形品
。[Claims] 1. An injection mold using both a hot runner and a cold runner, characterized in that a cold runner is provided on a slide core and a submarine gate is provided on the core. 2. A molded product characterized by a submarine gate having an elongated shape such as a rectangle, an ellipse, or an oval shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33523690A JPH04201426A (en) | 1990-11-30 | 1990-11-30 | Mold for injection molding and molded item |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33523690A JPH04201426A (en) | 1990-11-30 | 1990-11-30 | Mold for injection molding and molded item |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04201426A true JPH04201426A (en) | 1992-07-22 |
Family
ID=18286272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33523690A Pending JPH04201426A (en) | 1990-11-30 | 1990-11-30 | Mold for injection molding and molded item |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04201426A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723504A (en) * | 2013-12-20 | 2015-06-24 | 汉达精密电子(昆山)有限公司 | Mould glue injection structure |
| JP2020104293A (en) * | 2018-12-26 | 2020-07-09 | トヨタ自動車株式会社 | Injection molding method |
| CN119610562A (en) * | 2024-12-18 | 2025-03-14 | 深圳亿和模具制造有限公司 | A submersible gate structure with a slider capable of automatically ejecting and an application method thereof |
-
1990
- 1990-11-30 JP JP33523690A patent/JPH04201426A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723504A (en) * | 2013-12-20 | 2015-06-24 | 汉达精密电子(昆山)有限公司 | Mould glue injection structure |
| JP2020104293A (en) * | 2018-12-26 | 2020-07-09 | トヨタ自動車株式会社 | Injection molding method |
| CN119610562A (en) * | 2024-12-18 | 2025-03-14 | 深圳亿和模具制造有限公司 | A submersible gate structure with a slider capable of automatically ejecting and an application method thereof |
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