JPH0156889B2 - - Google Patents
Info
- Publication number
- JPH0156889B2 JPH0156889B2 JP26632485A JP26632485A JPH0156889B2 JP H0156889 B2 JPH0156889 B2 JP H0156889B2 JP 26632485 A JP26632485 A JP 26632485A JP 26632485 A JP26632485 A JP 26632485A JP H0156889 B2 JPH0156889 B2 JP H0156889B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- tip
- nozzle body
- outflow hole
- mold
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B29C45/2737—Heating or cooling means therefor
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)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、射出成形機の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 a nozzle for an injection molding machine.
（従来の技術）
従来、射出ノズルでは、ノズル本体の外周にバ
ンドヒータ又は電磁誘導コイル等の加熱装置を装
着すると共に、ノズル本体先端の近傍に熱電対等
の温度センサを埋設等し、かつ、ノズル本体先端
の開口部にノズルチツプを装着していた。(Prior art) Conventionally, in an injection nozzle, a heating device such as a band heater or an electromagnetic induction coil is attached to the outer periphery of the nozzle body, and a temperature sensor such as a thermocouple is buried near the tip of the nozzle body. A nozzle tip was attached to the opening at the tip of the main body.
（発明が解決しようとする問題点）
しかし、ノズル本体の加熱温度分布で最も高温
になるのは加熱装置の中央に当たる位置で、樹脂
流出孔が配置されたノズル本体先端から大幅にず
れているため、ノズル本体先端近傍に配置された
温度センタを使用しても、ノズルチツプの加熱温
度を確実に目標値とすることができないと共に、
加熱温度分布自体の希望通りのものとし難い。一
方、樹脂流出孔の冷却が放冷であつても水冷等の
強制冷却であつても、その冷却部分はノズル本体
の先端であり、温度制御のし易い加熱装置中央に
当たる位置から離れているから、ノズルチツプの
最低冷却温度を確実に目標値とすることができな
いと共に、降温速度が遅いという不都合を免れな
かつた。(Problem to be solved by the invention) However, in the heating temperature distribution of the nozzle body, the highest temperature is at the center of the heating device, which is far away from the tip of the nozzle body where the resin outflow hole is located. Even if a temperature center placed near the tip of the nozzle body is used, the heating temperature of the nozzle tip cannot be reliably set to the target value, and
It is difficult to obtain the desired heating temperature distribution itself. On the other hand, whether the resin outflow hole is cooled by natural cooling or by forced cooling such as water cooling, the cooling part is at the tip of the nozzle body and is away from the center of the heating device where temperature control is easy. However, the minimum cooling temperature of the nozzle tip cannot be reliably set to the target value, and the temperature decrease rate is slow.
（問題点を解決するための手段）
本発明の射出成形機のノズルは、ノズル本体の
外周に加熱装置を配設した射出ノズルにおいて、
前記ノズル本体の加熱温度分布で最も高温になる
位置に樹脂流出孔を配設し、該流出孔より先端側
のノズル本体先端部内を拡径してブツシユ嵌合部
を形成すると共に、金型に装着されたスプルーブ
ツシユを金型背面から突設し、該スプルーブツシ
ユを、前記ブツシユ嵌合部に嵌合し、かつ、樹脂
流出孔先端に面接触しうるように形成したことを
特徴としており、かかる構成によつて樹脂流出孔
の温度制御を容易にかつ安定的に行なえるように
したものである。(Means for Solving the Problems) The nozzle of the injection molding machine of the present invention is an injection nozzle in which a heating device is disposed on the outer periphery of the nozzle body.
A resin outflow hole is provided at the position where the temperature reaches the highest temperature in the heating temperature distribution of the nozzle body, and the inside of the tip of the nozzle body on the tip side from the outflow hole is expanded to form a bushing fitting part, and The attached sprue bush is formed so as to protrude from the back side of the mold, and to fit into the bush fitting part and to come into surface contact with the tip of the resin outflow hole. With this configuration, the temperature of the resin outflow hole can be easily and stably controlled.
（実施例）
以下本発明を誘導加熱方式の実施例を示す図面
に沿い説明する。(Example) The present invention will be explained below with reference to the drawings showing an example of an induction heating system.
図中１は電磁誘導コイルで、非磁性材製のノズ
ル本体２の外周に配設されている。 In the figure, reference numeral 1 denotes an electromagnetic induction coil, which is disposed around the outer periphery of a nozzle body 2 made of a non-magnetic material.
３は樹脂流出孔３ａを形成する磁性材製のノズ
ルチツプで、ノズル本体２と一体又は別体に構成
されており、電磁誘導コイル１の通電による誘導
加熱によつて得られるノズル本体２の軸心に沿う
加熱温度分布で最も高温になる位置（通常、電磁
誘導コイル装着範囲の中央）の該ノズル本体内に
樹脂流出孔３ａが位置するように配設されてい
る。 Reference numeral 3 denotes a nozzle tip made of a magnetic material that forms a resin outflow hole 3a, which is configured integrally with or separately from the nozzle body 2, and which has an axis center of the nozzle body 2 obtained by induction heating by energization of the electromagnetic induction coil 1. The resin outflow hole 3a is located in the nozzle main body at the highest temperature in the heating temperature distribution along the nozzle body (usually the center of the electromagnetic induction coil installation range).
４はブツシユ嵌合部で、ノズルチツプ３より先
端側のノズル本体２の先端部内にこれを拡径した
状態で形成されている。 Reference numeral 4 denotes a bushing fitting portion, which is formed in the distal end portion of the nozzle body 2 on the distal side of the nozzle tip 3 in an enlarged diameter state.
５はスプルーブツシユで、金型６に装着されて
該金型背面から突設されている。 A sprue bush 5 is attached to the mold 6 and protrudes from the back surface of the mold.
そして、型締め時スプルーブツシユ５とブツシ
ユ嵌合部４が互に嵌合し、かつ、該スプルーブツ
シユ５とノズルチツプ３が互に面接触すると共
に、ノズル本体２と金型６が互に面接触すること
ができるように形成されている。 When the mold is clamped, the sprue bush 5 and the bush fitting part 4 are fitted into each other, the sprue bush 5 and the nozzle tip 3 are in surface contact with each other, and the nozzle body 2 and the mold 6 are in contact with each other. It is formed so that surface contact can be made.
ノズルチツプ３とスプルーブツシユ５の接触面
は、接触面積を増やし、かつ、芯合わせができる
ようテーパ面（テーパの向きは逆でもよい。）で
あることが好ましい。 The contact surface between the nozzle tip 3 and the sprue bush 5 is preferably a tapered surface (the direction of the taper may be reversed) so as to increase the contact area and enable alignment.
７は冷却水孔で、金型６内のスプルーブツシユ
５の周りでかつ、ノズル本体接触箇所の近傍に配
設されている。 Reference numeral 7 denotes a cooling water hole, which is arranged around the sprue bush 5 in the mold 6 and near the nozzle body contact point.
８は熱電対等の温度センサで、ノズルチツプ３
の周部に埋設されている。 8 is a temperature sensor such as a thermocouple, and nozzle tip 3
It is buried around the area.
尚、電磁誘導コイル１を使用した例につき説明
したが、バンドヒータ等他の加熱装置でも同効で
ある。 Although an example using the electromagnetic induction coil 1 has been described, other heating devices such as a band heater can have the same effect.
（作用）
電磁誘導コイル１に通電すると、誘導加熱でノ
ズルチツプ３は最も加熱されて他の部分に比べて
最高温となる。(Function) When the electromagnetic induction coil 1 is energized, the nozzle tip 3 is heated the most due to induction heating and has the highest temperature compared to other parts.
電磁誘導コイル１への通電を遮断し、かつ、ノ
ズルタツチさせると、ノズルチツプ３はスプルー
ブツシユ５と直接広い面積で面接触すると共に、
該ノズルチツプ３を保持するノズル本体２の先端
部はスプルーブツシユ５及び金型６と広い面積で
面接触するため、ノズルチツプ３は効率良く冷却
される。 When the electromagnetic induction coil 1 is de-energized and the nozzle is touched, the nozzle tip 3 comes into direct surface contact with the sprue bush 5 over a wide area, and
Since the tip of the nozzle body 2 holding the nozzle tip 3 comes into surface contact with the sprue bush 5 and the mold 6 over a wide area, the nozzle tip 3 is efficiently cooled.
ノズルチツプ３の加熱時と冷却時の温度は、該
ノズルチツプ３に埋設した温度センサ８により適
確に検出される。 The temperature of the nozzle tip 3 during heating and cooling is accurately detected by a temperature sensor 8 embedded in the nozzle tip 3.
（発明の効果）
以上の通り本発明によれば、ノズル本体先端部
内にスプルーブツシユを嵌入させて、加熱部分の
中心（加熱温度分布で最も高温になる位置）に配
設したノズルチツプ（樹脂流出孔）を効率良く加
熱、冷却できるため、ノズルチツプの温度制御が
従来に比べてより容易かつ安定的に行なえること
になり、成形性を大幅に改善できると共に、ノズ
ル開閉動作を迅速かつ確実に行なえ、従つて成形
サイクルの高速化を図れる。(Effects of the Invention) As described above, according to the present invention, a sprue bush is fitted into the tip of the nozzle body, and the nozzle tip (resin outflow Since the nozzle tip can be heated and cooled efficiently, the temperature of the nozzle tip can be controlled more easily and stably than before, greatly improving formability and allowing the nozzle to open and close quickly and reliably. Therefore, the molding cycle can be sped up.
図面は本発明の一実施例を示す概要図である。
１……電磁誘導コイル、２……ノズル本体、３
……ノズルチツプ、４……ブツシユ嵌合部、６…
…金型、７……冷却水孔、８……温度センサ。
The drawing is a schematic diagram showing an embodiment of the present invention. 1... Electromagnetic induction coil, 2... Nozzle body, 3
...Nozzle tip, 4...Button fitting part, 6...
...Mold, 7...Cooling water hole, 8...Temperature sensor.
Claims (1)
ノズルにおいて、前記ノズル本体の加熱温度分布
で最も高温になる位置に樹脂流出孔を配設し、該
流出孔より先端側のノズル本体先端部内を拡径し
てブツシユ嵌合部を形成すると共に、金型に装着
されたスプルーブツシユを金型背面から突設し、
該スプルーブツシユを、前記ブツシユ嵌合部に嵌
合し、かつ、樹脂流出孔先端に面接触しうるよう
に形成したことを特徴とする射出成形機のノズ
ル。1. In an injection nozzle in which a heating device is provided on the outer periphery of the nozzle body, a resin outflow hole is provided at the position where the highest temperature occurs in the heating temperature distribution of the nozzle body, and the inside of the tip of the nozzle body on the tip side from the outflow hole is The diameter is expanded to form a bushing fitting part, and the sprue bushing attached to the mold is protruded from the back of the mold.
A nozzle for an injection molding machine, characterized in that the sprue bushing is formed so as to fit into the bushing fitting portion and come into surface contact with the tip of the resin outflow hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26632485A JPS62124921A (en) | 1985-11-27 | 1985-11-27 | Nozzle of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26632485A JPS62124921A (en) | 1985-11-27 | 1985-11-27 | Nozzle of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62124921A JPS62124921A (en) | 1987-06-06 |
| JPH0156889B2 true JPH0156889B2 (en) | 1989-12-01 |
Family
ID=17429338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26632485A Granted JPS62124921A (en) | 1985-11-27 | 1985-11-27 | Nozzle of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62124921A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212816U (en) * | 1988-07-11 | 1990-01-26 | ||
| DE29821097U1 (en) * | 1998-11-25 | 1999-02-11 | Unitemp S.A., Courroux | Nozzle tip for an injection molding nozzle for plastic |
| KR100536771B1 (en) * | 2002-08-16 | 2005-12-14 | 유도실업주식회사 | Device and method for opening and closing noggle gate with heating and cooling device for hot runners of injection molding machines |
| DE60332971D1 (en) | 2003-03-06 | 2010-07-22 | Husky Injection Molding | ANGIESSVORRRICHTUNG |
| ITTO20110665A1 (en) * | 2011-07-25 | 2013-01-26 | Ergotech Srl | INJECTION MOLDING SYSTEM OF PLASTIC MATERIALS, PARTICULARLY SUITABLE FOR PRINTING PIECES WITH A SHAPE AS A ROTATING OR SIMILAR FORM, AND CORRESPONDING METHOD |
| CN109968607A (en) * | 2019-03-28 | 2019-07-05 | 英格斯模具制造（中国）有限公司 | Fluid Monitoring Nozzle |
-
1985
- 1985-11-27 JP JP26632485A patent/JPS62124921A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62124921A (en) | 1987-06-06 |
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