JPH0229010B2 - - Google Patents
Info
- Publication number
- JPH0229010B2 JPH0229010B2 JP59097327A JP9732784A JPH0229010B2 JP H0229010 B2 JPH0229010 B2 JP H0229010B2 JP 59097327 A JP59097327 A JP 59097327A JP 9732784 A JP9732784 A JP 9732784A JP H0229010 B2 JPH0229010 B2 JP H0229010B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sleeve
- hot runner
- core
- needle
- 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
- 239000011347 resin Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
- B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
-
- 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
- B29C45/2758—Means for preventing drooling by decompression of the moulding material
-
- 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
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、多重成形金型（スタツクモールド）
用樹脂漏れ（ドルーリング）防止装置に関するも
のである。[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to a multi-molding mold (stack mold).
This invention relates to a device for preventing resin leakage.
（従来技術とその問題点）
多重成形金型は、通常キヤビテイプレートの両
面に成形面が形成されているため、射出ノズルと
キヤビテイプレートとは型開きの都度離れる。こ
のため、射出完了後可塑化シリンダ内及びキヤビ
テイプレートのホツトランナーマニホールド内に
残つている樹脂の圧力により、金型を型開きした
時、ランナーゲートから溶融樹脂が糸状に漏れる
現象が起きる。(Prior art and its problems) In a multiple molding mold, molding surfaces are usually formed on both sides of the cavity plate, so the injection nozzle and the cavity plate are separated each time the mold is opened. Therefore, due to the pressure of the resin remaining in the plasticizing cylinder and the hot runner manifold of the cavity plate after injection is completed, when the mold is opened, molten resin leaks in the form of threads from the runner gate.
そこで従来、樹脂漏れ防止のため、ノズル側に
はこれに組込んだボール式、ニードル式等の弁機
構により、射出時以外は樹脂流路を遮断できるよ
うにしているのに対して、キヤビテイプレート側
には特別なシール装置を設けず、スクリユサツク
バツクを利用して射出完了後残圧を抜き、ランナ
ー内の溶融樹脂圧が負圧方向になるように強制的
に操作しているが、樹脂漏れを確実に防止できな
いという不具合を免れなかつた。 Conventionally, in order to prevent resin leakage, a valve mechanism such as a ball type or needle type built into the nozzle side was used to shut off the resin flow path except during injection. No special sealing device is installed on the plate side, and the residual pressure is released after injection is completed using a screw back, and the molten resin pressure in the runner is forcibly operated in the negative pressure direction. However, the problem was that resin leakage could not be reliably prevented.
（発明の目的）
本発明は前記従来の問題点を解決するために創
案されたもので、延長ノズルとキヤビテイプレー
トのホツトランナーゲートの樹脂凝固の防止を図
りつつ延長ノズルのゲートとキヤビテイプレート
のホツトランナーゲートからの樹脂漏れを確実に
防止できるようにすることを目的とする。(Object of the Invention) The present invention was devised in order to solve the above-mentioned problems of the conventional art. The purpose is to reliably prevent resin leakage from the hot runner gate.
（発明の構成）
本発明の多重成形金型用樹脂漏れ防止装置は、
コア金型が装置されて対向して配置されたコアプ
レートと、キヤビテイ金型が装置されて前記コア
プレート間に配置されたキヤビテイプレートとを
型開閉、型締可能に設け、該キヤビテイプレート
の内部に、キヤビテイ金型に組込んだホツトチツ
プと該ホツトチツプに連通するホツトランナーと
を有するホツトランナーブロツクを設置した多重
成形金型において、前記ホツトランナーブロツク
に、キヤビテイプレートを貫通してその固定プラ
テン側パーテイング面に達するスリーブを装着
し、該スリーブ内に油圧シリンダにより進退可能
で、前進端位置でスリーブ先端ランナーゲートを
シール可能なニードルを挿入すると共に、可塑化
装置に、前記スリーブと同芯に固定プラテン側コ
アプレートを貫通してそのパーテイング面まで延
長された延長ノズルを設け、該延長ノズル内に油
圧シリンダにより進退可能で、前進端位置で延長
ノズル先端ゲートをシール可能なニードルを挿入
したことを特徴とする。(Structure of the Invention) The resin leakage prevention device for multiple molding molds of the present invention includes:
A core plate equipped with a core mold and disposed facing each other, and a cavity plate equipped with a cavity mold and arranged between the core plates are provided so as to be able to open and close the mold and clamp the cavity plate. In a multi-layer molding mold in which a hot runner block having a hot chip incorporated in a cavity mold and a hot runner communicating with the hot chip is installed inside the mold, the hot runner block is fixed to the hot runner block by penetrating the cavity plate. A sleeve that reaches the parting surface on the platen side is installed, and a needle that can move forward and backward with a hydraulic cylinder and that can seal the sleeve tip runner gate at the forward end position is inserted into the sleeve, and a needle that is concentric with the sleeve is inserted into the plasticizing device. An extension nozzle was provided that penetrated the fixed platen side core plate and extended to the parting surface thereof, and a needle was inserted into the extension nozzle that could move forward and backward with a hydraulic cylinder and that could seal the extension nozzle tip gate at the forward end position. It is characterized by
（実施例） 以下本発明の一実施例を図面により説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
図中１は固定プラテンで、コア金型２，…を備
えたコアプレート３が装着されている。４は可動
プラテンで、コア金型２，…を備えたコアプレー
ト５がコアプレート３と対向して装着されてい
る。該可動プラテン４は、型締装置によりガイド
ピン６に沿い固定プラテン１側に前後進可能に構
成されている。７はコアプレート３，５間のガイ
ドピン６に移動可能に装着されたキヤビテイプレ
ートで、コアプレート３，５に設けたコア金型
２，…の対向部にキヤビテイ金型８，…が装着さ
れ、かつ、内部に、該キヤビテイ金型８，…に組
込まれたホツトチツプ９，…と、該ホツトチツプ
９に連通するホツトランナー１０とを有するホツ
トランナーブロツク１１が設置されている。ホツ
トランナーブロツク１１には、キヤビテイプレー
ト７を貫通してその固定プラテン１側パーテイン
グ面１２に達するスリーブ１３が装着され、該ス
リーブ１３内には、ホツトランナーブロツク１１
の反コアプレート３側部に装着された油圧シリン
ダ１４により進退されるニードル１５が挿入さ
れ、該ニードル１５は、前進端位置でスリーブ１
３の先端部をシールするように該スリーブ１３の
先端ランナーゲート１６とを密嵌すると共にパー
テイング面１２と面一となるよう構成されてい
る。このスリーブ１３の周面にはバンドヒータ１
７が装着されている。１８は可塑化装置、１９は
この可塑化装置１８に設けられており、前記スリ
ーブ１３と同芯に固定プラテン側コアプレート３
を貫通してそのパーテイング面１２まで延長され
た延長ノズルである。該延長ノズル１９内には、
可塑化装置１８に装着された油圧シリンダにより
ゲート２０に向つて進退されるニードル２１が挿
入され、該ニードル２１は前進端位置で延長ノズ
ル１９の先端部ゲート２０に密嵌すると共に、該
延長ノズル１９の先端面とパーテイング面１２に
面一となるように構成されている。この延長ノズ
ル１９の周面にはバンドヒータ２２が装着されて
いる。 In the figure, reference numeral 1 denotes a fixed platen, on which a core plate 3 equipped with core molds 2, . . . is mounted. Reference numeral 4 denotes a movable platen, on which a core plate 5 having core molds 2, . . . is mounted facing the core plate 3. The movable platen 4 is configured to be movable back and forth toward the fixed platen 1 along guide pins 6 by a mold clamping device. Reference numeral 7 denotes a cavity plate movably attached to a guide pin 6 between the core plates 3 and 5, and cavity molds 8,... are attached to opposing portions of the core molds 2,... provided on the core plates 3, 5. A hot runner block 11 having hot chips 9, . . . incorporated in the cavity molds 8, . The hot runner block 11 is fitted with a sleeve 13 that passes through the cavity plate 7 and reaches the parting surface 12 on the fixed platen 1 side.
A needle 15 is inserted which is moved forward and backward by a hydraulic cylinder 14 attached to the side opposite to the core plate 3, and the needle 15 is inserted into the sleeve 1 at the forward end position.
The sleeve 13 is tightly fitted with the tip runner gate 16 of the sleeve 13 so as to seal the tip of the sleeve 3, and is flush with the parting surface 12. A band heater 1 is provided on the circumferential surface of this sleeve 13.
7 is installed. 18 is a plasticizing device, and 19 is provided in this plasticizing device 18, and a platen side core plate 3 fixed concentrically with the sleeve 13.
This is an extended nozzle extending through the parting surface 12 thereof. Inside the extension nozzle 19,
A needle 21 is inserted which is moved forward and backward toward the gate 20 by a hydraulic cylinder attached to the plasticizing device 18, and the needle 21 is tightly fitted into the tip gate 20 of the extension nozzle 19 at the forward end position, and the extension nozzle 19 and the parting surface 12 are configured to be flush with each other. A band heater 22 is attached to the circumferential surface of this extension nozzle 19.
（作用）
可塑化装置１８による射出の開始とともに、ニ
ードル１５，２１が後退されて延長ノズル１９の
ゲート２０とスリーブ１３のゲート１６（ホツト
ランナー入口）が開かれ、溶融樹脂２３は、延長
ノズル１９を経てスリーブ１３およびホツトラン
ナーブロツク１１内のホツトランナー１０に到つ
た後、コア金型２，…とキヤビテイ金型８，…か
ら構成されたキヤビテイにホツトチツプ９を経て
充填される。充填完了後サツクバツクによりホツ
トランナー１０内の樹脂圧力が減少され、かつ、
ニードル１５，２１が時間差をもつて前進されて
延長ノズル１９のゲート２０とスリーブ１３のゲ
ート１６が閉じられる。この状態にすることによ
つて可塑化装置１８は可塑化工程に入り、また金
型側は冷却、型開き、製品離型となる。(Function) At the start of injection by the plasticizing device 18, the needles 15 and 21 are retracted to open the gate 20 of the extension nozzle 19 and the gate 16 (hot runner inlet) of the sleeve 13, and the molten resin 23 flows through the extension nozzle 19. After reaching the sleeve 13 and the hot runner 10 in the hot runner block 11, it is filled through the hot chip 9 into a cavity composed of core molds 2, . . . and cavity molds 8, . After the filling is completed, the resin pressure inside the hot runner 10 is reduced by suction, and
The needles 15 and 21 are advanced with a time difference to close the gate 20 of the extension nozzle 19 and the gate 16 of the sleeve 13. In this state, the plasticizing device 18 enters the plasticizing process, and the mold side cools, opens the mold, and releases the product.
延長ノズル１９とスリーブ１３がニードル２
１，１５により閉じられた状態ではゲート１６，
２０は完全にシールされ、型開き中における樹脂
漏れは発生しないし、延長ノズル先端とスリーブ
先端に溶融樹脂が到らず、バンドヒータ１７，１
９による任意の温度調節が可能となり、樹脂凝固
が発生しない。 The extension nozzle 19 and sleeve 13 are the needle 2
1 and 15, the gate 16,
20 is completely sealed, no resin leakage occurs during mold opening, molten resin does not reach the tip of the extension nozzle and the tip of the sleeve, and the band heaters 17, 1
9 allows arbitrary temperature adjustment, and resin coagulation does not occur.
（発明の効果）
以上の通り、本発明は、可塑化装置には延長ノ
ズル、多重成形金型のホツトランナーブロツクに
は樹脂導入口のスリーブを型締状態で接続可能に
設けると共に、延長ノズル先端部と、スリーブ先
端部に油圧シリンダで作動するニードル弁機構を
組込んで、ノズルゲートとスリーブゲートからの
樹脂漏れを防止し、併せてホツトランナー内での
樹脂凝固をも完全に防止できるようにした構成で
あるから、多重成形における成形品の品質と成形
効率を向上させ得ると共に、材料ロスも減少させ
ることができる等の効果を有する。(Effects of the Invention) As described above, the present invention provides an extension nozzle in the plasticizing device, a resin inlet sleeve in the hot runner block of the multi-molding mold so that it can be connected in a clamped state, and an extension nozzle at the tip of the extension nozzle. A needle valve mechanism operated by a hydraulic cylinder is incorporated into the sleeve and sleeve tip to prevent resin leakage from the nozzle gate and sleeve gate, as well as completely prevent resin solidification within the hot runner. Because of this configuration, it is possible to improve the quality and molding efficiency of molded products in multiple molding, and it also has effects such as being able to reduce material loss.
第１図の上半分と下半分は本発明の一実施例を
射出完了状態と型開き完了状態で示す断面図、第
２図は射出完了状態で示す第１図の要部拡大図で
ある。
１……固定プラテン、２……コア金型、３……
コアプレート、１……可動プラテン、５……コア
プレート、６……ガイドピン、７……キヤビテイ
プレート、８……キヤビテイ金型、９……ホツト
チツプ、１０……ホツトランナー、１１……ホツ
トランナーブロツク、１２……パーテイング面、
１３……スリーブ、１４……油圧シリンダ、１
５，２１……ニードル、１６，２０……ゲート、
１７，２２……バンドヒータ、１８……可塑化装
置、１９……延長ノズル。
The upper and lower halves of FIG. 1 are cross-sectional views showing one embodiment of the present invention in a completed injection state and a completed mold opening state, and FIG. 2 is an enlarged view of the main part of FIG. 1 shown in an injection completed state. 1...Fixed platen, 2...Core mold, 3...
Core plate, 1... Movable platen, 5... Core plate, 6... Guide pin, 7... Cavity plate, 8... Cavity mold, 9... Hot chip, 10... Hot runner, 11... Hot Runner block, 12...parting surface,
13...Sleeve, 14...Hydraulic cylinder, 1
5,21...needle, 16,20...gate,
17, 22...band heater, 18...plasticizing device, 19...extension nozzle.
Claims (1)
アプレートと、キヤビテイ金型が装着されて前記
コアプレート間に配置されたキヤビテイプレート
とを型開閉、型締可能に設け、該キヤビテイプレ
ートの内部に、キヤビテイ金型に組込んだホツト
チツプと、該ホツトチツプに連通するホツトラン
ナーとを有するホツトランナーブロツクを設置し
た多重成形金型において、前記ホツトランナーブ
ロツクに、キヤビテイプレートを貫通してその固
定プラテン側パーテイング面に達するスリーブを
装着し、該スリーブ内に油圧シリンダにより進退
可能で、前進端位置でスリーブ先端ランナーゲー
トをシール可能なニードルを挿入すると共に、可
塑化装置に、前記スリーブと同芯に固定プラテン
側コアプレートを貫通してそのパーテイング面ま
で延長された延長ノズルを設け、該延長ノズル内
に油圧シリンダにより進退可能で、前進端位置で
延長ノズル先端ゲートをシール可能なニードルを
挿入したことを特徴とする多重成形金型用樹脂漏
れ防止装置。1. A core plate to which a core mold is mounted and arranged facing each other, and a cavity plate to which a cavity mold is mounted and arranged between the core plates are provided so that the mold can be opened and closed, and the mold can be clamped. In a multi-molding mold in which a hot runner block having a hot chip incorporated in a cavity mold and a hot runner communicating with the hot chip is installed inside the plate, the hot runner block is provided with a hot runner block that penetrates the cavity plate. A sleeve that reaches the parting surface on the fixed platen side is installed, and a needle that can move forward and backward with a hydraulic cylinder and that can seal the sleeve tip runner gate at the forward end position is inserted into the sleeve, and the sleeve and the needle are inserted into the plasticizing device. An extension nozzle is provided that extends concentrically through the core plate on the fixed platen side to the parting surface, and a needle that can move forward and backward with a hydraulic cylinder and seal the extension nozzle tip gate at the forward end position is installed in the extension nozzle. A resin leakage prevention device for multiple molding molds, characterized by the fact that it is inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9732784A JPS60240425A (en) | 1984-05-15 | 1984-05-15 | Resin leakage preventing device for multiple molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9732784A JPS60240425A (en) | 1984-05-15 | 1984-05-15 | Resin leakage preventing device for multiple molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60240425A JPS60240425A (en) | 1985-11-29 |
| JPH0229010B2 true JPH0229010B2 (en) | 1990-06-27 |
Family
ID=14189387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9732784A Granted JPS60240425A (en) | 1984-05-15 | 1984-05-15 | Resin leakage preventing device for multiple molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60240425A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63104810A (en) * | 1986-10-21 | 1988-05-10 | Nec Corp | Molding die for plastic disc |
| WO2000067985A1 (en) * | 1999-05-10 | 2000-11-16 | Mold-Masters Limited | Method and apparatus for distributing melt in a multi-level stack mold |
| US6348171B1 (en) | 1999-05-11 | 2002-02-19 | Mold Masters Limited | Drool control apparatus and method |
| NL1017239C2 (en) * | 2001-01-30 | 2002-07-31 | Tooltech B V | Multi level mold tool for an injection molding machine, has a hot runner connected to the central injection pipe via a channel extending through the mold section closure surface |
| CA2407163C (en) * | 2002-10-09 | 2010-12-14 | Stackteck Systems Ltd. | Valve pin cross over nozzle |
| DE102004015879B4 (en) | 2003-03-31 | 2018-12-13 | Mold-Masters (2007) Limited | Injection molding system with anti-flow device |
| US7115226B2 (en) | 2003-06-20 | 2006-10-03 | Mold-Masters Limited | Stack mold having a melt homogenizing element |
| US7125242B2 (en) | 2003-08-11 | 2006-10-24 | Mold-Masters Limited | Decompression device for an injection molding apparatus |
| CA2545283C (en) | 2003-11-12 | 2011-04-05 | Stackteck Systems Ltd. | Valve pin cross over nozzle for stack mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52118360U (en) * | 1976-03-05 | 1977-09-08 |
-
1984
- 1984-05-15 JP JP9732784A patent/JPS60240425A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60240425A (en) | 1985-11-29 |
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