JPS63231917A - Hot-runner mold device - Google Patents
Hot-runner mold deviceInfo
- Publication number
- JPS63231917A JPS63231917A JP6391487A JP6391487A JPS63231917A JP S63231917 A JPS63231917 A JP S63231917A JP 6391487 A JP6391487 A JP 6391487A JP 6391487 A JP6391487 A JP 6391487A JP S63231917 A JPS63231917 A JP S63231917A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- movable part
- sprue bushing
- nozzle
- 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
- 239000011347 resin Substances 0.000 claims abstract description 34
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 230000007423 decrease Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001746 injection moulding 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
- B29C45/2758—Means for preventing drooling by decompression of the moulding material
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〕
本発明はプラスチックの射出成形におけるホットランナ
金型に関するものであり、金型スプルブツシュからの樹
脂漏れ防止に好適な金型装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot runner mold for plastic injection molding, and more particularly to a mold device suitable for preventing resin leakage from a mold sprue bush.
従来のホットランナ金型では第３図のようにマニホール
ド１３．スプルブツシュ１２内の樹脂が溶融状態に保た
れた状態で射出後成形機ノズル１１とスプルブツシュ１
２を離すと、マニホールド１７内の残留射出圧によりス
プルブツシュ１２の先端孔から樹脂漏れが発生する恐れ
があった。In the conventional hot runner mold, the manifold 13. After injection, the molding machine nozzle 11 and the sprue bush 1
2, there was a risk that residual injection pressure within the manifold 17 would cause resin to leak from the tip hole of the sprue bush 12.
なお、１７と１９はヒータ、１４は樹脂を通すホットチ
ップ、１５はゲート、１６は成形品部である。Note that 17 and 19 are heaters, 14 is a hot chip for passing resin, 15 is a gate, and 16 is a molded part.
上記従来技術はスプルブツシュからの樹脂漏れについて
の対策が配慮がされておらず、成形作業者が漏れた樹脂
を取り除かなければならない問題があった。この漏れた
樹脂は放置されると成形機ノズルとスプルブツシュとを
接合しに＜＜シ、その後の成形時のトラブルと金型破損
の原因となる。The above-mentioned conventional technology does not take measures against resin leakage from the sprue bushing, and there is a problem in that the molding operator has to remove the leaked resin. If this leaked resin is left unattended, it will cause trouble in joining the molding machine nozzle and sprue bushing, causing trouble during subsequent molding and damage to the mold.
本発明の目的は、ホットランナ金型装置のスプルブツシ
ュからの樹脂漏れを防止し、成形トラブルを防止すると
共に、成形作業の無人化、ハイサイクル化を可能にする
ことにある。An object of the present invention is to prevent resin leakage from a sprue bush of a hot runner mold device, prevent molding troubles, and enable unmanned molding operations and high cycle speeds.
上記目的は、樹脂の軟化点以上に保たれたマ二ホールド
と、このマニホールドに接続され成形機ノズルと対応す
るスプルブツシュを有するホットランナ金型装置におい
て、成形機ノズルとスプルブツシュは両者が離れる際、
スプルブツシュ内の樹脂部容積が増加し、両者が接合の
際減少するようにスプルブツシュの一部が可動的に構成
されたことホットランナ金型装置により達成される。The above object is to provide a hot runner mold device having a manifold maintained above the softening point of the resin and a sprue bush connected to the manifold and corresponding to a molding machine nozzle.
This is achieved by the hot runner mold apparatus in which a portion of the sprue bushing is configured to be movable so that the volume of the resin within the sprue bushing increases and the volume of the resin portion in the sprue bushing decreases during joining.
射出時、ノズルのタッチ力（接触圧力）により前進端ま
で移動しているノズル側のスプルブツシュ本体は、射出
後ノズルの後退に伴ない、ばね等弾性体の働きでストッ
パの位置まで後退する。それによってスプルブツシュ内
の樹脂部通路の容積が増加するのでスプルブツシュ、マ
ニホールド内の樹脂圧が減少する０以上のことより、ノ
ズルがスプルブツシュから離れてもスプルブツシュから
の樹脂漏れが防止される。During injection, the sprue bush main body on the nozzle side, which is moved to the forward end by the touch force (contact pressure) of the nozzle, retreats to the stopper position by the action of an elastic body such as a spring as the nozzle retreats after injection. As a result, the volume of the resin passage in the sprue bush increases, and the resin pressure in the sprue bush and manifold decreases.Since the resin pressure in the sprue bush and the manifold decreases, resin leakage from the sprue bush is prevented even if the nozzle is separated from the sprue bush.
以下、本発明の一実施例を第１図、第２図を基に説明す
る０両図において、１は溶融した樹脂が供給される成形
機１ズル、２は成形機１ズルが押しつけら九で樹脂が供
給されるスプルブツシュ本体、２ａ・２ｂはスプルブツ
シュを分割して構成したものでそれぞれ固定部と可動部
である。この可動部２ｂは筒状をなして固定部２ａに摺
動可能に取付けられ、ストッパ２ｃによって摺動範囲が
制限される。また可動部２ｂは圧力ばね８によって固定
部２ａから遠ざかるように付勢されて取付けられている
。第１図の状態は可動部２ｂが左端寄りに付勢されてお
り、可動・固定の画部分の間に隔間Ａなる室が形成され
る。上記両可動・固定部２ｂ・２ａは互いに連通ずるよ
うに樹脂の通過孔が設けられている。９はマニホールド
２全体を加熱して供給された樹脂の硬化を防止するヒー
タ。Hereinafter, an embodiment of the present invention will be explained based on FIG. 1 and FIG. 2. In the figures, 1 is a molding machine 1 to which molten resin is supplied, and 2 is a molding machine 1 that is pressed by the molding machine 1. The sprue bush main bodies 2a and 2b to which the resin is supplied are constructed by dividing the sprue bush, and are a fixed part and a movable part, respectively. The movable part 2b has a cylindrical shape and is slidably attached to the fixed part 2a, and its sliding range is limited by a stopper 2c. Moreover, the movable part 2b is attached and urged by a pressure spring 8 so as to move away from the fixed part 2a. In the state shown in FIG. 1, the movable portion 2b is biased toward the left end, and a chamber having a distance A is formed between the movable and fixed image portions. Both movable and fixed parts 2b and 2a are provided with resin passage holes so as to communicate with each other. A heater 9 heats the entire manifold 2 to prevent the supplied resin from curing.
上記構成において、樹脂を注入するときは第２図に示す
ように成形機ノズル１がスプルブツシュ２の可動部２ｂ
の先端に押しつけられる。このとき可動部２ｂばばね８
の圧力に打ち勝って同定部２ａに押しつけられる。第２
図の状態で樹脂の注入が終了するとノズル１が矢印方向
に後退して第１図の状態となる。この状態では可動部２
ｂはばね８の圧力によって押し戻され、スプルブツシュ
内に隔間Ａの室が形成される。すなわち、スプルブツシ
ュ内の樹脂の存在する容積（樹脂部容積）が増加する。In the above configuration, when injecting the resin, the molding machine nozzle 1 moves into the movable part 2b of the sprue bush 2 as shown in FIG.
pressed against the tip of the At this time, the movable part 2b spring 8
is pressed against the identification part 2a by overcoming the pressure of. Second
When the injection of resin is completed in the state shown in the figure, the nozzle 1 moves back in the direction of the arrow, resulting in the state shown in FIG. In this state, the movable part 2
b is pushed back by the pressure of spring 8, and a chamber of distance A is formed in the sprue bush. That is, the volume in which resin exists in the sprue bush (resin portion volume) increases.
従って、この増加した容積弁だけマニホールド１３とス
プルブツシュ２内の樹脂の圧力は低下し、可動部２ｂの
先端からの樹脂漏れを効果的に防止できる。Therefore, the pressure of the resin in the manifold 13 and the sprue bush 2 is reduced by the increased volume of the valve, and resin leakage from the tip of the movable part 2b can be effectively prevented.
本発明によれば、ホットランナ型の成形において、スプ
ルブツシュからの樹脂漏れが防止できるので、成形作業
の無人化、ハイサイクル成形化の効果がある。According to the present invention, in hot runner molding, resin leakage from the sprue bushing can be prevented, resulting in unmanned molding operations and high-cycle molding.
第１図、第２図は本発明の一実施例のスプルブツシュの
断面図であり、第１図はスプルブツシュとノズルとが離
れた状態を示し、第２図は接合した状態を示し、第３ｒ
：４は従来のスプルブツシュと金荊嬬：ｔｈ九票−１？
嬉蒲囚−気ス
ト・・成形機ノズル、２・・・スプルブツシュ、２ａ・
・・固定部、２ｂ・・・可動部、１３・・・マニホール
ド。
１７・・・マニホールドヒータ、８・・・ばね、９・・
・スプルブツシュヒータ。FIGS. 1 and 2 are cross-sectional views of a sprue bushing according to an embodiment of the present invention. FIG. 1 shows the sprue bush and the nozzle separated, FIG.
: 4 is the conventional sprubutushu and Jin Jingbin: th nine votes -1?
Happy Prisoner - Air St... Molding machine nozzle, 2... Sprubutsch, 2a...
... Fixed part, 2b... Movable part, 13... Manifold. 17... Manifold heater, 8... Spring, 9...
・Sprubutshuhita.
Claims (1)
マニホールドに接続され成形機ノズルと対応するスプル
ブッシュを有するホットランナ金型装置において、成形
機ノズルとスプルブッシュは両者が離れる際、スプルブ
ッシュ内の樹脂部容積が増加し、両者が接合の際減少す
るようにスプルブッシュの一部が可動的に構成されたこ
とを特徴とするホットランナ金型装置。1. In a hot runner mold device that has a manifold maintained above the softening point of the resin and a sprue bush that is connected to this manifold and corresponds to the molding machine nozzle, when the molding machine nozzle and sprue bush are separated, the sprue bush A hot runner mold apparatus characterized in that a part of the sprue bush is configured to be movable so that the volume of the resin part therein increases and the volume of the resin part decreases when the two are joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6391487A JPS63231917A (en) | 1987-03-20 | 1987-03-20 | Hot-runner mold device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6391487A JPS63231917A (en) | 1987-03-20 | 1987-03-20 | Hot-runner mold device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63231917A true JPS63231917A (en) | 1988-09-28 |
Family
ID=13243079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6391487A Pending JPS63231917A (en) | 1987-03-20 | 1987-03-20 | Hot-runner mold device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63231917A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0937564A1 (en) * | 1998-02-24 | 1999-08-25 | Illinois Tool Works Inc. | Sprue bushing of an injection moulding machine |
| EP0995574A1 (en) * | 1998-10-20 | 2000-04-26 | Incoe International, Inc. | Nozzles for injection moulding apparatus |
| US6238204B1 (en) | 1999-09-01 | 2001-05-29 | Illinois Tool Works Inc. | Injection molding system with pressure bushing locating ring |
| EP1657046A2 (en) * | 2004-11-11 | 2006-05-17 | Otto Männer Innovation GmbH | Injection mould with hot-runner |
-
1987
- 1987-03-20 JP JP6391487A patent/JPS63231917A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0937564A1 (en) * | 1998-02-24 | 1999-08-25 | Illinois Tool Works Inc. | Sprue bushing of an injection moulding machine |
| US6135758A (en) * | 1998-02-24 | 2000-10-24 | Illinois Tool Works Inc. | Injection molding system with improved pressure bushing |
| EP0995574A1 (en) * | 1998-10-20 | 2000-04-26 | Incoe International, Inc. | Nozzles for injection moulding apparatus |
| US6238204B1 (en) | 1999-09-01 | 2001-05-29 | Illinois Tool Works Inc. | Injection molding system with pressure bushing locating ring |
| EP1657046A2 (en) * | 2004-11-11 | 2006-05-17 | Otto Männer Innovation GmbH | Injection mould with hot-runner |
| EP1657046A3 (en) * | 2004-11-11 | 2007-04-25 | Otto Männer Innovation GmbH | Injection mould with hot-runner |
| US7377770B2 (en) | 2004-11-11 | 2008-05-27 | Männer Innovation GmbH | Injection molding tool |
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