JPS60240425A - Resin leakage preventing device for multiple molding die - Google Patents

Resin leakage preventing device for multiple molding die

Info

Publication number
JPS60240425A
JPS60240425A JP9732784A JP9732784A JPS60240425A JP S60240425 A JPS60240425 A JP S60240425A JP 9732784 A JP9732784 A JP 9732784A JP 9732784 A JP9732784 A JP 9732784A JP S60240425 A JPS60240425 A JP S60240425A
Authority
JP
Japan
Prior art keywords
resin
hot runner
gate
sleeve
resin leakage
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.)
Granted
Application number
JP9732784A
Other languages
Japanese (ja)
Other versions
JPH0229010B2 (en
Inventor
Naoki Takigawa
直樹 滝川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP9732784A priority Critical patent/JPS60240425A/en
Publication of JPS60240425A publication Critical patent/JPS60240425A/en
Publication of JPH0229010B2 publication Critical patent/JPH0229010B2/ja
Granted legal-status Critical Current

Links

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)

Abstract

PURPOSE:To arrange so that resin leakage from an extended nozzle gate and a sleeve gate may be prevented and at the same time, resin coagulation inside a hot runner is also prevented by building a needle valve mechanism into an extended nozzle on a core plate side and the inlet of a hot runner on a cavity plate side. CONSTITUTION:After the completion of filling resin, the pressure of resin in a hot runner 10 is reduced by sucking it back. In addition, needles 15, 21 are advanced with time differential resulting in the closing of a gate 20 for an extended nozzle 19 and a gate 16 (inlet of the hot runner) for a sleeve 13. Under this condition, the gates 16, 20 are completely sealed and resin leakage does not occur during die opening. Further, it is possible to adjust temperature arbitrarily by a band heater thus eliminating resin coagulation.

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（スタックモールド）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 (Field of Industrial Application) The present invention relates to a device for preventing resin and fat leakage (drouling) for multiple molding molds (stack molds).

（従来技術とその問題点） 多重成形金型は、通常キャビティプレートの両面に成形
面が形成されているため、射出ノズルとキャビティプレ
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ャビティプレートのホットランナ
−マニホールド内に残っ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 multi-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, the 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
組込んだポール式、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、キャビティプレート側には特別なシール装置を設け
ず、スクリュサックバッ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ったＱ （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、延長ノズルとキャビティプレートのホットラン
ナ−ゲートの樹脂凝固の防止を図りつつ延長ノズルのゲ
ートとキャビテイグレートのホットランナ−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。Conventionally, to prevent resin leakage, a valve mechanism such as a pole 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 side, and the residual pressure is released after injection is completed using a screw sack bag, and the molten resin pressure inside the runner is forcibly operated in the negative pressure direction. The problem was that leakage could not be reliably prevented. (Objective of the Invention) The present invention was devised to solve the above-mentioned conventional problems. An object of the present invention is to reliably prevent resin leakage from a gate of an extension nozzle and a hot runner gate of a cavity rate.

（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、固定プラ
テン側コアプレートを貫通してパーティング面まで延長
された延長ノズルに進退可能なニードル弁機構を組込む
と共に、核延長ノズルと型締状態で接続されるキャビテ
ィプレートに設けたホットランナ−内に進退可能なニー
ドル弁機構を組込んだことを特徴とする。(Structure of the Invention) The resin leakage prevention device for multiple molding molds of the present invention incorporates a needle valve mechanism that can move forward and backward into the extension nozzle that penetrates the core plate on the fixed platen side and extends to the parting surface. It is characterized by incorporating a needle valve mechanism that can move forward and backward into a hot runner provided in a cavity plate that is connected to the nozzle in a mold-clamped state.

（実施例） １′Ｊ、下水発明の一実施例を図面により説明する。(Example) 1'J, an embodiment of the sewage invention will be explained with reference to the drawings.

図中１は固定プラテンで、コア金型２１　・・・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、コア金石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
ｌ側に前後進可能に構成されている。７はコアプレート
３゜６間のガイドピン６に移動可能に装着されたキャビ
ティプレートで、コアプレート３．５に設けたコア金型
２．・・・の対向部にキャビティ金型８、・・・が装着
され、かつ、内部に、該キャビティ金型８．・・・Ｋ組
込まれたホットチップ９．・・・と、該ホットチップ９
に連通ずるホットランナ−１０とを有するホットランナ
−ブロック１１が設置されている。ホットランナ−ブロ
ック１１には、キャビティプレート７とコアプレート３
側ハ＋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、ホットランナ−ブロック１１
０反コアプレート３側部に装着され念油圧シリンダ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夏３の先端部をシールす
るように１亥スリーブ１３の先端ランナーグー）　１６
と密嵌すると共にパーティングｒＭ１２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１７が装着されでいる。１８は可塑化装置、１９
はスリーブ１３と同芯軸上にコアグレート３のパーティ
ング面１２まで延長され九延長ノズルである。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
ンダによりゲート加に向っ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１
９の先端部グー）２０に密嵌すると共に、該延長ノズル
１９の先端面とパーティング面１２に面一となるように
構成されている。この延長ノズル１９０局面にはバンド
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 having core molds 21 . . . is attached. 4 is a movable platen, and core goldstone 2. A core plate 5 equipped with... is mounted facing the core plate 3. The movable platen 4 is configured to be movable back and forth toward the fixed platen l along guide pins 6 by a mold clamping device. 7 is a cavity plate movably attached to the guide pin 6 between the core plates 3.6, and the core mold 2.7 provided on the core plate 3.5. The cavity molds 8, . ... K built-in hot chip 9. ...and the hot chip 9
A hot runner block 11 having a hot runner 10 communicating with the hot runner block 11 is installed. The hot runner block 11 includes a cavity plate 7 and a core plate 3.
A sleeve 13 is mounted that reaches the side facing surface 12, and inside the sleeve 13 there is a hot runner block 11.
A psycho-hydraulic cylinder 14 is attached to the side of the anti-core plate 3.
A needle 15 is inserted which is advanced and retracted by the needle 15, and the needle 15 seals the tip of the sleeve 13 at the forward end position (16).
It is configured so that it fits tightly and is flush with the parting rM12. A band heater 17 is attached to the circumferential surface of the sleeve 13. 18 is a plasticizing device, 19
is a nine-extension nozzle that extends to the parting surface 12 of the core grate 3 on the same axis as the sleeve 13. A needle 21 is inserted into the extension nozzle 19 and is moved back and forth toward gate application by a hydraulic cylinder attached to the plasticizing device 18, and the needle 21 is inserted into the extension nozzle 1 at the forward end position.
It is configured to tightly fit into the tip end portion (goo) 20 of the extension nozzle 9 and to be flush with the tip surface of the extension nozzle 19 and the parting surface 12. A band heater 22 is attached to the side of the extension nozzle 190.

（作用） 可塑化装置１８による射出の開始とともに、ニードル１
５．２１が後退されて延長ノズル１９のゲート幻とスリ
ーブ１３のゲート１６（ホットランナ−人口）が開かれ
、溶融樹脂２３は、延長ノズル１９を経てスリーブ１３
およびホットランナ−ブロックｌｌ内のホットランナ−
１０に到った後、コア金型２、・・・とキャビティ金型
８．・・・から構成されな各キャビティにホットチップ
９を経て充填される。充填完了後サックバックによりホ
ットランナ−１Ｇ内の樹脂圧力が減少され、かつ、ニー
ドル１δ、　２１が時間差をもって前進されて延長ノズ
ル１９のゲート加とスリーブ１３のグー）　１６が閉じ
られる。こ１の状態にすることによって可塑化装置１８
は可塑化工程に入シ、また金型側は冷却、型開き、製品
！＠型となる。(Function) With the start of injection by the plasticizing device 18, the needle 1
5.21 is retracted to open the gate of the extension nozzle 19 and the gate 16 (hot runner) of the sleeve 13, and the molten resin 23 passes through the extension nozzle 19 to the sleeve 13.
and the hot runner in the hot runner block
After reaching 10, core mold 2,... and cavity mold 8. . . . is filled into each cavity through the hot tip 9. After filling is completed, the resin pressure in the hot runner 1G is reduced by suckback, and the needles 1δ and 21 are advanced with a time lag to gate the extension nozzle 19 and close the sleeve 13 (16). By bringing this state to 1, the plasticizing device 18
Enters the plasticizing process, and the mold side is cooled, the mold is opened, and the product is finished! Becomes @ type.

延長ノズル１９とスリーブ１３がニードル２１．１５に
より閉じられた状態ではグー）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１７．１９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。When the extension nozzle 19 and the sleeve 13 are closed by the needle 21.15, the needle 16.20 is completely sealed, and there is no resin leakage during mold opening, and molten resin does not reach the extension nozzle tip and the sleeve tip. Therefore, arbitrary temperature adjustment using the band heaters 17 and 19 is possible, and resin coagulation does not occur.

（発明の効果） 以上の通り本発明は、延長ノズルと、該延長ノズルと型
締状態で接続されるキャビティプレート側ホットランナ
−の入ロ部処ニードル弁機溝を組込んで、ノズルゲート
加とスリーブゲート１６からの樹脂漏れを防止し、併せ
てホットランナ−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 incorporates an extension nozzle and a needle valve groove in the entry area of a hot runner on the side of the cavity plate that is connected to the extension nozzle in a mold-clamped state to apply nozzle gate control. This structure prevents resin from leaking from the sleeve gate 16 and also completely prevents resin from coagulating in the hot runner, thereby improving the quality of molded products and molding efficiency in multiple molding. At the same time, it also has the effect of reducing material loss.

【図面の簡単な説明】[Brief explanation of drawings]

オ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、牙２図は射出完了
状態で示すオ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、４・・・可動プラテン、５・・・コアプレ
ート、６・・・ガイドピン、７・・・キャビティプレー
ト、８・・・キャビティ金型、９・・・ホットチップ、
ｌＯ・・・ホットランナ−１１１・・・ホットランナ−
ブロック、１２・・・パーティング面、１３・・・寿ｉ
スリーブ、１４・・・油圧シリンダ、１５．　２１・・
・ニードル、１６．　２０・・・グー）、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 Figure O1 are cross-sectional views showing one embodiment of the present invention in a completed injection state and a completed mold opening state, and Figure 2 is an enlarged view of the main part of Figure O1, showing an injection completed state. DESCRIPTION OF SYMBOLS 1... Fixed platen, 2... Core mold, 3... Core plate, 4... Movable platen, 5... Core plate, 6... Guide pin, 7... Cavity plate, 8... Cavity mold, 9... Hot chip,
lO...Hot runner-111...Hot runner-
Block, 12... Parting surface, 13... Kotobuki i
Sleeve, 14... Hydraulic cylinder, 15. 21...
・Needle, 16. 20...gu), 17.22.
...Band heater, 18...Plasticizing device, 19...
extension nozzle.

Claims (1)

【特許請求の範囲】[Claims] 固定プラテン側コアプレートを貫通してパーティング面
まで延長された延長ノズルにニードル弁機構を組込むと
共に、該延長ノズルと型締状態で接続されるキャビティ
プレートに設けたホットランナ−内にニードル弁機構を
組込んだことを特徴とする多重成形金型用樹脂漏れ防止
装置。A needle valve mechanism is installed in an extension nozzle that penetrates the core plate on the fixed platen side and extends to the parting surface, and a needle valve mechanism is installed in a hot runner provided in a cavity plate that is connected to the extension nozzle in a clamped state. A resin leakage prevention device for multiple molding molds, which is characterized by incorporating.
JP9732784A 1984-05-15 1984-05-15 Resin leakage preventing device for multiple molding die Granted JPS60240425A (en)

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 true JPS60240425A (en) 1985-11-29
JPH0229010B2 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)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63104810A (en) * 1986-10-21 1988-05-10 Nec Corp Molding die for plastic disc
WO2000067986A1 (en) * 1999-05-11 2000-11-16 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
JP2002544004A (en) * 1999-05-10 2002-12-24 モールド‐マスターズ、リミテッド Method and apparatus for branching melt in multi-stack mold
WO2004033182A1 (en) * 2002-10-09 2004-04-22 Stackteck Systems Ltd. Valve pin cross over nozzle for stack mould
WO2005046960A1 (en) * 2003-11-12 2005-05-26 Stackteck Systems Ltd. Valve pin cross over nozzle for stack mould
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
US7416402B2 (en) 2003-03-31 2008-08-26 Mold-Masters (2007) Limited Sprue bushing anti-drool device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52118360U (en) * 1976-03-05 1977-09-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52118360U (en) * 1976-03-05 1977-09-08

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63104810A (en) * 1986-10-21 1988-05-10 Nec Corp Molding die for plastic disc
JP2002544004A (en) * 1999-05-10 2002-12-24 モールド‐マスターズ、リミテッド Method and apparatus for branching melt in multi-stack mold
WO2000067986A1 (en) * 1999-05-11 2000-11-16 Mold-Masters Limited Drool control apparatus and method
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
WO2004033182A1 (en) * 2002-10-09 2004-04-22 Stackteck Systems Ltd. Valve pin cross over nozzle for stack mould
US7416402B2 (en) 2003-03-31 2008-08-26 Mold-Masters (2007) Limited Sprue bushing anti-drool 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
WO2005046960A1 (en) * 2003-11-12 2005-05-26 Stackteck Systems Ltd. Valve pin cross over nozzle for stack mould
US7287549B2 (en) 2003-11-12 2007-10-30 Stackteck Systems, Ltd Valve pin cross over nozzle for stack mould

Also Published As

Publication number Publication date
JPH0229010B2 (en) 1990-06-27

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