JPS63137821A - Injection molding nozzle - Google Patents

Injection molding nozzle

Info

Publication number
JPS63137821A
JPS63137821A JP28541586A JP28541586A JPS63137821A JP S63137821 A JPS63137821 A JP S63137821A JP 28541586 A JP28541586 A JP 28541586A JP 28541586 A JP28541586 A JP 28541586A JP S63137821 A JPS63137821 A JP S63137821A
Authority
JP
Japan
Prior art keywords
nozzle
mold
outlets
resin
runners
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
Application number
JP28541586A
Other languages
Japanese (ja)
Inventor
Hitoshi Hara
原　齊
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 JP28541586A priority Critical patent/JPS63137821A/en
Publication of JPS63137821A publication Critical patent/JPS63137821A/en
Pending 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
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2735—Sprue channels ; Runner channels or runner nozzles for non-coaxial gates, e.g. for edge gates
    • 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
    • B29C2045/2683—Plurality of independent mould cavities in a single mould

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

PURPOSE:To enable the title nozzle to be used for multiple molding, by a method wherein a plurality of outlets provided on the tip part of an injection nozzle are communicated with runners or interrupted within a mold through movement of plasticizing equipment. CONSTITUTION:Two annular heaters 10, 10' are provided on the tip part of a nozzle 9 and along with fitting of the circumference of the intermediate part of the nozzle 9 with a heater 11, a plurality of outlets 13, 13' branching from a flow path 12 in the direction different from a clamping and breaking directions of a mold and opening on the sides of the nozzle 9 by passing respectively through the insides of the heaters 10, 10' are provided. When plasticizing equipment 8 is moved forward and the injection nozzle 9 is inserted until it abuts against the bottom of an insertion hole 15 of the nozzle in clamped molds 1, 3 and an intermediate block 5, the outlets 13, 13' coincide with runners 16, 16' provided on parting faces 6, 6' which are different from each other respectively and communicated with each other. Then when molten resin is injected, the resin flows out into the runners 16, 16' from the outlets 13, 13' through a flow path 12 and cavities 7, 7' are filled with the resin.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、射出成形用ノズルに関し、特に多重成形用と
して有効なノズルに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding nozzle, and particularly to a nozzle that is effective for multiple molding.

（従来の技術とその問題点） 特開昭６１−１４４３１９号公報に示される射出成形用
ノズルは、可塑化装置に、固定プラテンを貫通して金型
内に延長した長尺ノズルを設け、該ノズル先端部に、ノ
ズル内流路と直角に交叉し、かつ、ノズルの側方に開口
する１段の流出口を設け、可塑化装置の進退により該流
出口を金型に設けたランナーと連通又は遮断可能とした
ものは公知である。しかしながら、この従来のものは、
コールドランナー金型を用い、スプルーレスで射出成形
できるという利点がある反面、多重成形用として使用で
きない。また、流出口が金型と密着しているために冷え
気味となり、樹脂の粘度が下がってスムーズな射出がし
にくくなると共に、長期間使用後金型のノズル嵌入孔部
とノズルとが摺動により摩耗して隙間を生じ、流出口か
ら射出された樹脂の一部が金型とノズル間にリークする
おそれがあるという不都合を免れなかった。(Prior art and its problems) An injection molding nozzle disclosed in Japanese Patent Application Laid-Open No. 144319/1980 has a plasticizing device equipped with a long nozzle that extends into the mold through a fixed platen. A single-stage outlet is provided at the tip of the nozzle, intersecting the nozzle internal flow path at right angles and opening on the side of the nozzle, and the outlet is communicated with a runner provided in the mold as the plasticizing device advances and retreats. Or, devices that can be shut off are publicly known. However, this conventional
Although it has the advantage of being able to injection mold without sprue using a cold runner mold, it cannot be used for multiple molding. Also, because the outlet is in close contact with the mold, it tends to get cold, which lowers the viscosity of the resin, making it difficult to inject smoothly, and the nozzle and the nozzle fitting hole of the mold may slide after long periods of use. There was an unavoidable inconvenience that a gap was created due to wear and there was a risk that a portion of the resin injected from the outlet would leak between the mold and the nozzle.

（発明の目的） 本発明は、０？Ｊ記従来の問題点を解決するためになし
たもので、多重成形用としても使用可能ならしめ、るこ
とを目的とする。(Object of the invention) The present invention is based on 0? Article J This was made to solve the problems of the conventional method, and the purpose is to enable it to be used for multiple molding.

（問題点を解決するための手段） 本発明の射出成形用ノズルは、可塑化装置に、固定プラ
テンを貫通して金型内に延長した進退可能な長尺ノズル
を設け、該ノズル先端部に、間隔をおいて、ノズル内の
同一流路から分岐してノズルの側方に開口すると共に、
選択的にランナーと係合する複数の流出口を設けたこと
を特徴とするものである。(Means for Solving the Problems) The injection molding nozzle of the present invention has a plasticizing device equipped with a long nozzle that extends into the mold through a fixed platen and can move forward and backward. , branching from the same flow path in the nozzle at intervals and opening on the side of the nozzle,
It is characterized by providing a plurality of outlets that selectively engage the runners.

（実施例） 以下、本発明の一実施例を図面で説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.

図中１は固定側金型で、固定プラテン２に装着されてい
る。３は可動側金型で、可動側プラテン４に装着されて
いるａ５は中間ブロックで、型開閉可能に金型１，３間
に配置され、かつ、図示しない装置により金型１又は金
型３に対して開閉可能に取付けられている。６，６′は
金型１及び３と中間ブロック５との間のパーティング面
である。In the figure, reference numeral 1 denotes a stationary mold, which is attached to a stationary platen 2. 3 is a movable side mold, and a5 attached to the movable side platen 4 is an intermediate block, which is arranged between the molds 1 and 3 so that the molds can be opened and closed, and which is connected to the mold 1 or the mold 3 by a device (not shown). It is installed so that it can be opened and closed. 6 and 6' are parting surfaces between the molds 1 and 3 and the intermediate block 5.

７．７′は金型１と中間ブロック５及び金型３と中間ブ
ロック５により夫々形成されたキャビティである。7.7' are cavities formed by the mold 1 and the intermediate block 5, and by the mold 3 and the intermediate block 5, respectively.

８は可塑化装置で、先端部には、前記固定プラテン２を
貫通して金型１，３及び中間ブロック５内に延長した長
尺な射出ノズル９が装着されている。Reference numeral 8 denotes a plasticizing device, and a long injection nozzle 9 extending through the fixed platen 2 and into the molds 1 and 3 and the intermediate block 5 is attached to the tip end thereof.

このノズル９の先端部には２個のリング状ヒータ（実施
例ではセラミックヒータ＞　ｉｏ、１０’が、また中間
部の周囲にはヒータ（実施例ではバンドヒータ）１１が
装着されると共に、前記ノズル先端部にはノズル内の同
一流路１２から型開閉方向と異なる方向（実施例では直
角方向）に分岐し、前記セラミックヒータ１０．１０’
内を夫々経てノズル側面に開口する複数の流出口１３．
１３’　（実施例ではセラミックヒータと同数の２個）
が設けられている。また、ノズル９の先端部と中間部に
は加熱温度検知用温度センサー１４，１・１′（実施例
では熱電対）が設けられている。Two ring-shaped heaters (ceramic heaters > io, 10' in the embodiment are attached to the tip of the nozzle 9, and a heater (band heater in the embodiment) 11 is attached around the middle part. At the tip of the nozzle, the same flow path 12 in the nozzle branches in a direction different from the mold opening/closing direction (perpendicular direction in the embodiment), and the ceramic heater 10.10'
A plurality of outlet openings 13.
13' (In the example, 2 pieces, the same number as the ceramic heaters)
is provided. Further, temperature sensors 14, 1, 1' (thermocouples in the embodiment) for detecting heating temperature are provided at the tip and middle portions of the nozzle 9.

１５はノズル挿入孔で、前記金型１，３及び中間ブロッ
ク５内に設けられており、該孔内には、その底部に当接
するまで前記射出ノズル９が挿入される。そして、その
ノズル９先端がノズル挿入孔１５底部に当接した時、セ
ラミックヒータ１０．１ｔｌｌ’がパーティング面６，
６′の位置及びその近傍のノズル挿入孔１５内面に摺接
するようになっている。Reference numeral 15 denotes a nozzle insertion hole, which is provided in the molds 1 and 3 and the intermediate block 5, into which the injection nozzle 9 is inserted until it comes into contact with the bottom. When the tip of the nozzle 9 comes into contact with the bottom of the nozzle insertion hole 15, the ceramic heater 10.1tll'
6' and the inner surface of the nozzle insertion hole 15 in the vicinity thereof.

１６．１６’はパーティング面６．６′に夫々設けたラ
ンナーで、一端がサイドゲートを介してキャビティ７．
７′に連通し、かつ、他端がノズル挿入孔１５内面に開
口しており、ノズル挿入孔１５に挿入した射出ノズル９
先端部の流出口１３．１３’に夫々接続される。Runners 16 and 16' are respectively provided on the parting surfaces 6 and 6', and one end is connected to the cavity 7 through the side gate.
7', and the other end is open to the inner surface of the nozzle insertion hole 15, and the injection nozzle 9 inserted into the nozzle insertion hole 15
They are respectively connected to the outlet ports 13 and 13' of the tip.

（作用） 図示しない移動シリンダにより可塑化装置８を前進させ
、射出ノズル９を型締めした金型１，３及び中間ブロッ
ク５内のノズル挿入孔１５底部に当接するまで挿入する
と、射出ノズル９先端部の流出口１３．１３’は、夫々
異なるパーティング面６，６′に設けたランナー１６．
１６’と合致し連通ずる。(Function) When the plasticizing device 8 is advanced by a moving cylinder (not shown) and the injection nozzle 9 is inserted until it comes into contact with the bottom of the nozzle insertion hole 15 in the clamped molds 1 and 3 and the intermediate block 5, the tip of the injection nozzle 9 The outlet ports 13.13' of the parts are connected to runners 16.13' provided on different parting surfaces 6, 6', respectively.
It matches and communicates with 16'.

次いで、図示しない射出駆動装置により計Ｙ段した溶融
樹脂を射出すると、この樹脂は、ノズル９内の流路１２
を経て流出口１６．１６’からランナー１６゜１６’　
へと流出し、キャビティ７．７′に充填される。Next, when a total of Y stages of molten resin are injected by an injection drive device (not shown), this resin flows through the flow path 12 in the nozzle 9.
From the outlet 16.16' to the runner 16°16'
and fills the cavity 7.7'.

ところで、射出ノズル９先端部の流出口１３．１３’は
、熱伝導率が低く、かつ、耐摩耗性に優れたセラミック
で構成され、通電による抵抗加熱で発熱しているため、
低温のノズル挿入孔１５内面と常時密着するが、冷やさ
れることがない。なお、射出はその付近の温度を温度セ
ンサー１４′　により検出し、セラミックヒータ１０，
１０’の加熱温度を互いに独立に設定できるために、流
出口１３．１３’から樹脂が流出する際の抵抗バランス
をとることができ、キャビティ７．７′への樹脂充填は
バランス良く行なわれる。By the way, the outlet 13.13' at the tip of the injection nozzle 9 is made of ceramic with low thermal conductivity and excellent wear resistance, and generates heat by resistance heating due to electricity.
Although it is always in close contact with the inner surface of the nozzle insertion hole 15 which is at a low temperature, it is not cooled. For injection, the temperature in the vicinity is detected by a temperature sensor 14', and the ceramic heater 10,
Since the heating temperatures 10' can be set independently of each other, the resistance when the resin flows out from the outlet 13, 13' can be balanced, and the resin filling into the cavity 7, 7' can be performed in a well-balanced manner.

そして射出後、図示しない制御装置により所定の保圧制
御をしながら金型１，３及び中間ブロック５内の図示し
ない温調装置によりキャビティ７゜７′内の樹脂の冷却
、固化を行なう。After injection, the resin in the cavities 7.degree. and 7' is cooled and solidified by temperature control devices (not shown) in the molds 1, 3 and intermediate block 5 while controlling a predetermined holding pressure by a control device (not shown).

この過程で、保圧完了後ランナー１６．１６’内の樹脂
が固化する前に可塑化装置８を後退させると、射出ノズ
ル９先端部の流出口１３．１３’は、ランナー１６．１
６’と遮断され、かつ、固定側金型１内のノズル挿入孔
１５内面により閉塞され、いわゆる鼻たれ現象は生じな
いが、その閉塞後も、セラミックヒータ１０，１０’と
バンドヒータ１１によりノズル９内の樹脂は加熱されて
溶融状態に保持される。In this process, if the plasticizing device 8 is retreated after the completion of holding pressure and before the resin in the runner 16.16' solidifies, the outlet 13.13' at the tip of the injection nozzle 9 will be connected to the runner 16.1.
6' and is blocked by the inner surface of the nozzle insertion hole 15 in the stationary mold 1, so that the so-called dripping phenomenon does not occur. The resin in 9 is heated and kept in a molten state.

キャビティ７．７′の樹脂の冷却固化が完了すると１図
示しない型締装置により型開きされ、次いで図示しない
エジェクタ機構によりキャビティ７゜７′及びランナー
１６．１６’内の樹脂（成形品）が離型される。When the resin in the cavity 7.7' is completely cooled and solidified, the mold is opened by a mold clamping device (not shown), and then the resin (molded product) in the cavity 7.7' and the runner 16.16' is separated by an ejector mechanism (not shown). be molded.

離型後、再び型締めして、前記と同一の手順で多重成形
が行なねれる。After the mold is released, the mold is clamped again and multiple molding is performed in the same procedure as above.

尚１本実施例では多重成形の場合について説明したが、
例えば１つのキャビティに両サイドゲート及びランナー
を経て樹脂をバランス良く迅速に充填する場合にも、ノ
ズル９を使用できることは言うまでもない。Note that in this example, the case of multiple molding was explained.
It goes without saying that the nozzle 9 can be used, for example, when filling one cavity with resin quickly and in a well-balanced manner via both side gates and runners.

（発明の効果） 以上の通り本発明は、射出ノズル先端部に設けた複数の
流出口を、可塑化装置の進退により金型内でランナーと
連通又は遮断させることができるから、構造が単純でか
つ安価なコールドランナー金型で多重成形等がスプルー
レスで行なえると共に、流出口の径の大きさ等により該
流出口から樹脂が流出する際の抵抗バランスをとり易く
、ノズルから流出口までの距離に差があっても各流出口
からの樹脂流出量をほぼ等しくできるから、操作性の向
上と、パージングによるクリーニング時間の短縮が図れ
る。(Effects of the Invention) As described above, the present invention has a simple structure because the plurality of outlets provided at the tip of the injection nozzle can be communicated with or cut off from the runner within the mold by moving the plasticizing device back and forth. In addition, multi-layer molding can be performed without sprue using an inexpensive cold runner mold, and the resistance when the resin flows out from the outlet can be easily balanced by adjusting the diameter of the outlet, and the distance from the nozzle to the outlet can be easily balanced. Even if there is a difference in the amount of resin flowing out from each outlet, the amount of resin flowing out from each outlet can be made almost equal, thereby improving operability and shortening the cleaning time due to purging.

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

図面は本発明の一実施例を示す断面図である。 １・・・固定側金型、　　　　２・・・固定プラテン、
３・・・可動側金型、　　　４・・・可動プラテン、５
・・・中間ブロック、　　６，６′・・・パーティング
面。 ７．７′・・・キャビティ、　　　８・・・可塑化装置
、９・・・射出ノズル、 １０、ｔｏ’・・・セラミックヒータ、１２・・・ノズ
ル内流路、　　１３．１３’・・・流出口、１４．１４
’・・・温度センサー、］５・・・ノズル挿入孔、１６
．１６’・・・ランナー。The drawing is a sectional view showing an embodiment of the present invention. 1... Fixed side mold, 2... Fixed platen,
3...Movable side mold, 4...Movable platen, 5
...Middle block, 6,6'...Parting surface. 7.7'... Cavity, 8... Plasticizing device, 9... Injection nozzle, 10, to'... Ceramic heater, 12... Nozzle internal flow path, 13.13'... Outlet, 14.14
'...Temperature sensor, ]5... Nozzle insertion hole, 16
．． 16'...Runner.

Claims (2)

【特許請求の範囲】[Claims] （１）可塑化装置に、固定プラテンを貫通して金型内に
延長した進退可能な長尺ノズルを設け、該ノズル先端部
に、間隔をおいて、ノズル内の同一流路から分岐してノ
ズルの側方に開口すると共に、選択的にランナーと係合
する複数の流出口を設けたことを特徴とする射出成形用
ノズル。(1) The plasticizing device is equipped with a long nozzle that penetrates the fixed platen and extends into the mold and can be advanced and retracted, and the tip of the nozzle has a flow path branching from the same flow path in the nozzle at intervals. An injection molding nozzle, characterized in that it is provided with a plurality of outlet ports that open on the sides of the nozzle and selectively engage with runners. （２）ノズル先端部の流出口部分にセラミックヒータ等
のヒータを設けたことを特徴とする特許請求の範囲第１
項記載の射出成形用ノズル。(2) Claim 1, characterized in that a heater such as a ceramic heater is provided at the outlet portion of the nozzle tip.
Injection molding nozzle as described in section.
JP28541586A 1986-11-29 1986-11-29 Injection molding nozzle Pending JPS63137821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28541586A JPS63137821A (en) 1986-11-29 1986-11-29 Injection molding nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28541586A JPS63137821A (en) 1986-11-29 1986-11-29 Injection molding nozzle

Publications (1)

Publication Number Publication Date
JPS63137821A true JPS63137821A (en) 1988-06-09

Family

ID=17691222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28541586A Pending JPS63137821A (en) 1986-11-29 1986-11-29 Injection molding nozzle

Country Status (1)

Country Link
JP (1) JPS63137821A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1547747A1 (en) * 2003-12-23 2005-06-29 Schöttli AG Hot runner for a multi-cavity mould
US7794228B2 (en) 2008-04-29 2010-09-14 Mold-Masters (2007) Limited Injection molding apparatus having an edge-gated runnerless nozzle
JP2014104709A (en) * 2012-11-29 2014-06-09 Nissei Plastics Ind Co Injection molding machine nozzle
CN109664465A (en) * 2018-12-28 2019-04-23 佛山市顺德区震旭塑料机械有限公司 A kind of injection molding machine nozzle anti-block apparatus and its application method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814728A (en) * 1981-07-20 1983-01-27 Shoichi Teraoka Multistage superposing mold
JPS58138626A (en) * 1982-02-13 1983-08-17 Mitsubishi Electric Corp Metallic mold for injection molding
JPS61144319A (en) * 1984-12-19 1986-07-02 Sumitomo Heavy Ind Ltd Injection molding method and device therof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814728A (en) * 1981-07-20 1983-01-27 Shoichi Teraoka Multistage superposing mold
JPS58138626A (en) * 1982-02-13 1983-08-17 Mitsubishi Electric Corp Metallic mold for injection molding
JPS61144319A (en) * 1984-12-19 1986-07-02 Sumitomo Heavy Ind Ltd Injection molding method and device therof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1547747A1 (en) * 2003-12-23 2005-06-29 Schöttli AG Hot runner for a multi-cavity mould
US7794228B2 (en) 2008-04-29 2010-09-14 Mold-Masters (2007) Limited Injection molding apparatus having an edge-gated runnerless nozzle
US8202082B2 (en) 2008-04-29 2012-06-19 Mold-Masters (2007) Limited Injection molding apparatus having an edge-gated runnerless nozzle including a bracing component and a securing component
US8206145B2 (en) 2008-04-29 2012-06-26 Mold-Masters (2007) Limited Injection molding apparatus having an edge-gated runnerless nozzle
US8210842B2 (en) 2008-04-29 2012-07-03 Mold-Masters (2007) Limited Injection molding apparatus having an edge-gated runnerless nozzle including a bracing portion and a securing component
US8475155B2 (en) 2008-04-29 2013-07-02 Mold-Masters (2007) Limited Injection molding nozzle having a bracing component and a securing component
JP2014104709A (en) * 2012-11-29 2014-06-09 Nissei Plastics Ind Co Injection molding machine nozzle
CN109664465A (en) * 2018-12-28 2019-04-23 佛山市顺德区震旭塑料机械有限公司 A kind of injection molding machine nozzle anti-block apparatus and its application method

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