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JPH0556418U - Nozzle heating device for injection molding machine - Google Patents

Nozzle heating device for injection molding machine

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Publication number
JPH0556418U
JPH0556418U JP11309091U JP11309091U JPH0556418U JP H0556418 U JPH0556418 U JP H0556418U JP 11309091 U JP11309091 U JP 11309091U JP 11309091 U JP11309091 U JP 11309091U JP H0556418 U JPH0556418 U JP H0556418U
Authority
JP
Japan
Prior art keywords
heater
nozzle
injection molding
molding machine
heating device
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
JP11309091U
Other languages
Japanese (ja)
Other versions
JP2509297Y2 (en
Inventor
順一 清水
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.)
Nissei Plastic Industrial Co Ltd
Original Assignee
Nissei Plastic Industrial Co Ltd
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Filing date
Publication date
Application filed by Nissei Plastic Industrial Co Ltd filed Critical Nissei Plastic Industrial Co Ltd
Priority to JP1991113090U priority Critical patent/JP2509297Y2/en
Publication of JPH0556418U publication Critical patent/JPH0556418U/en
Application granted granted Critical
Publication of JP2509297Y2 publication Critical patent/JP2509297Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

(57)【要約】 【目的】 構成の簡略化及び大幅なコストダウンを図る
とともに、温度分布の均一性を高める。 【構成】 加熱筒2の先端に有する射出ノズル3の周面
にヒータ4を付設する。射出ノズル3の前側3fと後側
3rにおけるヒータ4の電力密度を異ならせる。ヒータ
4は前側3fと後側3rの巻回密度を異ならせたコイル
状ヒータ、或いは巻線密度を異ならせたバンドヒータを
用いる。ヒータ4の電力密度は前側3fを大きく、後側
3rを小さく設定してもよいし、反対に、前側3fを小
さく、後側3rを大きく設定してもよい。
(57) [Summary] [Purpose] To simplify the configuration, reduce the cost significantly, and improve the uniformity of temperature distribution. [Structure] A heater 4 is attached to a peripheral surface of an injection nozzle 3 provided at a tip of a heating cylinder 2. The electric power density of the heater 4 on the front side 3f and the rear side 3r of the injection nozzle 3 is made different. As the heater 4, a coil heater having different winding densities on the front side 3f and the rear side 3r or a band heater having different winding densities is used. The electric power density of the heater 4 may be set large on the front side 3f and small on the rear side 3r, or conversely, may be set small on the front side 3f and large on the rear side 3r.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial application]

本考案は加熱筒の先端に有する射出ノズルの周面にヒータを付設してなる射出 成形機のノズル加熱装置に関する。 The present invention relates to a nozzle heating device for an injection molding machine in which a heater is attached to the peripheral surface of an injection nozzle provided at the tip of a heating cylinder.

【0002】[0002]

【従来の技術】[Prior Art]

一般に、射出成形機は射出装置と金型を備えるとともに、射出装置はスクリュ を内蔵する加熱筒を備えている。加熱筒の先端には金型に接する射出ノズルを有 し、この射出ノズルには、通常、内部における材料の固化を防止するため、周面 にヒータを付設した加熱装置を備えている。 Generally, an injection molding machine is equipped with an injection device and a mold, and the injection device is equipped with a heating cylinder containing a screw. An injection nozzle that contacts the mold is provided at the tip of the heating cylinder, and this injection nozzle is usually equipped with a heating device with a heater attached to the peripheral surface in order to prevent solidification of the material inside.

【0003】 ところで、射出ノズルは金型に接するため、金型が冷却機により冷却される場 合には、射出ノズルから金型に奪われる熱量も大きくなり、射出ノズルの温度分 布状況は図2に点線で示す分布曲線Pdのようになる。即ち、加熱温度は射出ノ ズルの前端側ほど漸次低下する傾向を示すため、射出ノズルの前端側(金型側) において加熱不足を生じ、材料の固化防止が不十分になったり、圧力損失の増加 を招くなどの不具合を生ずる。By the way, since the injection nozzle is in contact with the mold, when the mold is cooled by the cooler, the amount of heat taken by the mold from the injection nozzle also increases, and the temperature distribution situation of the injection nozzle is 2 shows a distribution curve Pd shown by a dotted line. That is, the heating temperature tends to gradually decrease toward the front end side of the injection nozzle, resulting in insufficient heating on the front end side (mold side) of the injection nozzle, resulting in insufficient solidification prevention of the material and pressure loss. It causes problems such as an increase.

【0004】 このため、従来は射出ノズルの位置に応じて加熱温度を異ならせるようにした 加熱手段も提案されている。例えば、実開昭63−154210号公報では、射 出ノズルの所要個所に複数の加熱体及び温度検知体を設けるとともに、温度検知 体の温度検知結果に基づいて、複数の加熱体を個別に制御するようにした制御機 構を設けた射出成形機の射出ノズルが開示されている。For this reason, conventionally, a heating means has been proposed in which the heating temperature is changed depending on the position of the injection nozzle. For example, in Japanese Utility Model Laid-Open No. 63-154210, a plurality of heating elements and a temperature detecting element are provided at required positions of an ejection nozzle, and the plurality of heating elements are individually controlled based on the temperature detection result of the temperature detecting element. There is disclosed an injection nozzle of an injection molding machine provided with such a control mechanism.

【0005】[0005]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかし、上述した従来の加熱手段はヒータ、温度センサ及び温度制御機構が全 て複数必要になり、構成の複雑化、さらにはコストの増大を招くとともに、複数 の加熱体の組合わせのため、連続性がなくなり、温度分布の均一性を高めること ができない難点があった。 However, the conventional heating means described above requires a plurality of heaters, temperature sensors, and temperature control mechanisms, which complicates the configuration and further increases the cost. However, there is a problem in that the uniformity of temperature distribution cannot be improved.

【0006】 本考案はこのような従来の技術に存在する課題を解決したものであり、構成の 簡略化及び大幅なコストダウンを図るとともに、温度分布の均一性を高めること ができる射出成形機のノズル加熱装置の提供を目的とする。The present invention solves the problems existing in such conventional technology, and simplifies the configuration, significantly reduces the cost, and improves the uniformity of temperature distribution in an injection molding machine. An object is to provide a nozzle heating device.

【0007】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は加熱筒2の先端に有する射出ノズル3の周面に、ヒータ4を付設して なる射出成形機のノズル加熱装置1を構成するに際して、特に、射出ノズル3の 前側3fと後側3rにおけるヒータ4の電力密度を異ならせてなることを特徴と する。 In the present invention, when the nozzle heating device 1 of the injection molding machine is provided with the heater 4 attached to the peripheral surface of the injection nozzle 3 at the tip of the heating cylinder 2, in particular, the front side 3f and the rear side 3r of the injection nozzle 3 are formed. The electric power density of the heater 4 is different.

【0008】 この場合、ヒータ4としては前側3fと後側3rの巻回密度を異ならせたコイ ル状ヒータ、或いは巻線密度を異ならせたバンドヒータを用いることができる。 また、ヒータ4の電力密度は前側3fを大きく、後側3rを小さく設定してもよ いし、反対に、前側3fを小さく、後側3rを大きく設定してもよい。さらにま た、射出ノズル3における異なる電力密度の境界には、例えば、射出ノズル3の 周面に形成した凹溝5sによる断熱部5を設けることができる。In this case, as the heater 4, a coil-shaped heater having different winding densities on the front side 3f and the rear side 3r, or a band heater having different winding densities can be used. Further, the power density of the heater 4 may be set to be large on the front side 3f and small on the rear side 3r, or conversely, may be set on the front side 3f to be small and the rear side 3r to be large. Furthermore, at the boundary of different power densities in the injection nozzle 3, for example, a heat insulating portion 5 formed by a concave groove 5s formed on the peripheral surface of the injection nozzle 3 can be provided.

【0009】[0009]

【作用】[Action]

本考案に係るノズル加熱装置1によれば、射出ノズル3の周面に付設するコイ ル状ヒータ等の巻回密度又は巻線密度を異ならせることにより、射出ノズル3の 前側3fと後側3rにおいてヒータ4自身の電力密度を異ならせることができる 。したがって、ヒータ4に対して単に通電するのみで、分布特性の異なる温度に より加熱することが可能となる。この場合、ヒータ4の巻回密度又は巻線密度を 密にすれば、電力密度は大きくなって、高温加熱が行われるとともに、巻回密度 又は巻線密度を疎にすれば、電力密度は小さくなって、低温加熱が行われる。 According to the nozzle heating device 1 of the present invention, the front side 3f and the rear side 3r of the injection nozzle 3 are made different by making the winding density or the winding density of the coil heater or the like attached to the peripheral surface of the injection nozzle 3 different. In, the electric power density of the heater 4 itself can be made different. Therefore, by simply energizing the heater 4, it becomes possible to heat the heater 4 at temperatures having different distribution characteristics. In this case, if the winding density or the winding density of the heater 4 is made dense, the power density becomes large, and high-temperature heating is performed, and if the winding density or the winding density is made sparse, the power density becomes small. Then, low temperature heating is performed.

【0010】 よって、ヒータ4における電力密度を温度分布状況に応じて設定することによ り、射出ノズル3の前端から後端に至る加熱温度を均一化できるとともに、必要 に応じて最適な温度分布を設定できる。特に、電力密度は連続的に異ならせるこ とができるため、均一性を高めることが可能になる。Therefore, by setting the power density in the heater 4 according to the temperature distribution condition, the heating temperature from the front end to the rear end of the injection nozzle 3 can be made uniform, and the optimum temperature distribution can be obtained as necessary. Can be set. In particular, since the power density can be made to be different continuously, the uniformity can be improved.

【0011】 なお、ヒータ4の電力密度を設定するに際し、前側3fを大きく、後側3rを 小さくすれば、金型の影響による射出ノズル3における前部の温度低下を補うこ とができる。また、電力密度を設定するに際し、前側3fを小さく、後側3rを 大きくすれば、例えば、ポリアミド樹脂等の成形時に、流動性を維持するために 射出ノズル3の全体温度を高めるとともに、先端温度を低く設定してスプル取出 時に発生するいわゆる「糸引き」や「鼻たれ」現象を防止する場合に有効となる 。一方、射出ノズル3における異なる電力密度の境界に、射出ノズル3の周面に 形成した凹溝5sによる断熱部5を設ければ、異なる温度領域の相互干渉を低減 し、安定した温度制御を実現できる。When setting the power density of the heater 4, if the front side 3f is made large and the rear side 3r is made small, it is possible to compensate for the temperature drop in the front part of the injection nozzle 3 due to the influence of the mold. Further, when setting the power density, if the front side 3f is made small and the rear side 3r is made large, for example, when molding polyamide resin or the like, the overall temperature of the injection nozzle 3 is increased and the tip temperature is maintained in order to maintain fluidity. This is effective in setting a low value to prevent so-called "stringing" and "nasal drooling" that occur during sprue removal. On the other hand, if the heat insulating portion 5 formed by the concave groove 5s formed on the peripheral surface of the injection nozzle 3 is provided at the boundary of different power densities in the injection nozzle 3, mutual interference in different temperature regions is reduced and stable temperature control is realized. it can.

【0012】[0012]

【実施例】【Example】

次に、本考案に係る好適な実施例を挙げ、図面に基づき詳細に説明する。 Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

【0013】 まず、本考案に係るノズル加熱装置1を備える射出成形機について、図3を参 照して説明する。First, an injection molding machine equipped with the nozzle heating device 1 according to the present invention will be described with reference to FIG.

【0014】 図3中、Mは射出成形機であり、特に、射出装置10の一部を示す。射出装置 10は前端に射出ノズル3を有する加熱筒2を備える。加熱筒2はスクリュ11 を内蔵し、スクリュ11は加熱筒2の後方に配設した不図示のスクリュ駆動部に より駆動せしめられる。なお、12は加熱筒3の後部に備えるホッパである。In FIG. 3, M is an injection molding machine, and particularly shows a part of the injection device 10. The injection device 10 includes a heating cylinder 2 having an injection nozzle 3 at the front end. The heating cylinder 2 has a screw 11 built therein, and the screw 11 is driven by a screw driving unit (not shown) disposed behind the heating cylinder 2. Reference numeral 12 is a hopper provided at the rear of the heating cylinder 3.

【0015】 一方、加熱筒2の周面には、内部の樹脂材料を加熱及び溶融するための加熱筒 ヒータ13を付設する。加熱筒ヒータ13は加熱筒2の前領域に付設する前ヒー タ部13fと、中間領域に付設する中間ヒータ部13mと、後領域に付設する後 ヒータ部13rを備え、各ヒータ部13f、13m及び13rは制御部14に接 続する。そして、各領域に付設した不図示の温度センサの検出結果を、制御部1 4に付与することにより、各領域毎に異なる温度制御を行う。On the other hand, on the peripheral surface of the heating cylinder 2, a heating cylinder heater 13 for heating and melting the resin material inside is attached. The heating cylinder heater 13 includes a front heater part 13f attached to the front region of the heating cylinder 2, an intermediate heater part 13m attached to the intermediate region, and a rear heater part 13r attached to the rear region, and each heater part 13f, 13m. And 13r are connected to the control unit 14. Then, the detection result of a temperature sensor (not shown) attached to each area is given to the control unit 14 to perform different temperature control for each area.

【0016】 次に、本考案に係るノズル加熱装置1の構成及び機能について、図1〜図3を 参照して説明する。Next, the configuration and function of the nozzle heating device 1 according to the present invention will be described with reference to FIGS.

【0017】 まず、射出ノズル3の周面には図1に示すようにヒータ4を付設する。ヒータ 4としてはコイル状ヒータ又はバンドヒータを利用することができる。また、ヒ ータ4は射出ノズル3の軸方向に対して電力密度を異ならせる。即ち、射出ノズ ル3の前側3fにおける巻回密度又は巻線密度を大きくするとともに、他方、後 側3rにおける巻回密度又は巻線密度を小さくする。実施例は前側3fが前端側 に行くに従って漸次連続的に巻回密度又は巻線密度を大きくした場合を示す。ま た、ヒータ4は制御部14に接続する。First, a heater 4 is attached to the peripheral surface of the injection nozzle 3 as shown in FIG. As the heater 4, a coil heater or a band heater can be used. Further, the heater 4 makes the power density different in the axial direction of the injection nozzle 3. That is, the winding density or winding density on the front side 3f of the injection nozzle 3 is increased, while the winding density or winding density on the rear side 3r is decreased. The embodiment shows a case where the winding density or winding density is gradually and continuously increased as the front side 3f goes to the front end side. Moreover, the heater 4 is connected to the control unit 14.

【0018】 よって、制御部14からヒータ4に通電すれば、電力密度(巻回密度又は巻線 密度)に対応して射出ノズル3の加熱が行われ、射出ノズル3の前側3fが相対 的に高温、後側3rが相対的に低温となる。この場合、ヒータ4の巻回密度又は 巻線密度は連続的に変化させることができるため、均一加熱時の温度分布が図2 に示す分布曲線Pdとなる場合、その分布曲線Pdを補うことにより、加熱温度 を分布曲線Psのように均一化できるとともに、その均一性を高めることができ る。なお、コイル状ヒータは簡単に変形可能なため、巻回密度の選定により電力 密度の調整を容易に行うことができる。また、ヒータ4に対しては単に通電する のみで所望の温度分布を得れるため、制御系は不図示の単一の温度センサを用い た制御系のみで足りるとともに、温度センサの付設位置は前側又は後側のいずれ であってもよい。Accordingly, when the heater 4 is energized from the control unit 14, the injection nozzle 3 is heated according to the power density (winding density or winding density), and the front side 3f of the injection nozzle 3 is relatively moved. High temperature, rear side 3r becomes relatively low temperature. In this case, since the winding density or the winding density of the heater 4 can be continuously changed, when the temperature distribution during uniform heating becomes the distribution curve Pd shown in FIG. 2, the distribution curve Pd can be supplemented by supplementing the distribution curve Pd. The heating temperature can be made uniform as shown by the distribution curve Ps, and the uniformity can be improved. Since the coiled heater can be easily deformed, the power density can be easily adjusted by selecting the winding density. Further, since the desired temperature distribution can be obtained by simply energizing the heater 4, the control system need only be a control system using a single temperature sensor (not shown), and the temperature sensor can be installed at the front side. Alternatively, it may be on the rear side.

【0019】 次に、本考案に係る変更実施例について、図4を参照して説明する。Next, a modified embodiment according to the present invention will be described with reference to FIG.

【0020】 変更実施例はヒータ4を前部4fと後部4rの二つの領域に分け、前部4fの 巻回密度又は巻線密度を小さくし、他方、後部4rの巻回密度又は巻線密度を大 きくした場合を示す。また、前部4fと後部4rの境界における射出ノズル3の 周面には周方向に沿ったリング状の凹溝5sを形成する。これにより、断熱部5 が形成され、異なる温度領域の相互干渉を低減し、安定した温度制御を実現する 。なお、断熱部5としてはこのような空気層をはじめ、セラミック、ステンレス 等による断熱層を設けてもよい。In the modified embodiment, the heater 4 is divided into two regions, a front part 4f and a rear part 4r, to reduce the winding density or winding density of the front part 4f, while the winding density or winding density of the rear part 4r is reduced. It shows the case of increasing. Further, a ring-shaped recessed groove 5s is formed along the circumferential direction on the peripheral surface of the injection nozzle 3 at the boundary between the front portion 4f and the rear portion 4r. As a result, the heat insulating section 5 is formed, mutual interference between different temperature regions is reduced, and stable temperature control is realized. As the heat insulating section 5, not only such an air layer but also a heat insulating layer made of ceramic, stainless steel or the like may be provided.

【0021】 以上、実施例について詳細に説明したが、本考案はこのような実施例に限定さ れるものではなく、細部の構成、数量、部品、材料等において、本考案の要旨を 逸脱しない範囲で任意に変更できる。Although the embodiments have been described in detail above, the present invention is not limited to such embodiments, and the details of the configuration, quantity, parts, materials, etc. are within the scope of the present invention. Can be changed arbitrarily.

【0022】[0022]

【考案の効果】[Effect of the device]

このように、本考案は加熱筒の先端に有する射出ノズルの周面にヒータを付設 してなる射出成形機のノズル加熱装置において、特に、射出ノズルの前側と後側 におけるヒータの電力密度を異ならせてなるため、構成の簡略化及び大幅なコス トダウンを図れるとともに、温度分布の均一性を高めることができるという顕著 な効果を奏する。 As described above, the present invention relates to a nozzle heating device of an injection molding machine in which a heater is attached to the peripheral surface of an injection nozzle provided at the tip of a heating cylinder, and particularly when the power density of the heater is different between the front side and the rear side of the injection nozzle. As a result, the structure is simplified and the cost is significantly reduced, and the temperature distribution uniformity can be improved, which is a remarkable effect.

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

【図1】本考案に係るノズル加熱装置の要部を模式的に
示す断面構成図、
FIG. 1 is a cross-sectional configuration diagram schematically showing a main part of a nozzle heating device according to the present invention,

【図2】射出ノズルの温度分布曲線図、FIG. 2 is a temperature distribution curve diagram of an injection nozzle,

【図3】同ノズル加熱装置を備えた射出成形機の一部断
面構成図、
FIG. 3 is a partial cross-sectional configuration diagram of an injection molding machine including the nozzle heating device,

【図4】変更実施例に係るノズル加熱装置の要部を模式
的に示す断面構成図、
FIG. 4 is a cross-sectional configuration diagram schematically showing a main part of a nozzle heating device according to a modified embodiment.

【符号の説明】[Explanation of symbols]

1 ノズル加熱装置 2 加熱筒 3 射出ノズル 3f 射出ノズルの前側 3r 射出ノズルの後側 4 ヒータ 5 断熱部 5s 凹溝 1 Nozzle Heating Device 2 Heating Cylinder 3 Injection Nozzle 3f Front of Injection Nozzle 3r Rear of Injection Nozzle 4 Heater 5 Heat Insulation 5s Recessed Groove

Claims (7)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 加熱筒の先端に有する射出ノズルの周面
にヒータを付設してなる射出成形機のノズル加熱装置に
おいて、射出ノズルの前側と後側におけるヒータの電力
密度を異ならせたことを特徴とする射出成形機のノズル
加熱装置。
1. In a nozzle heating device of an injection molding machine in which a heater is attached to the peripheral surface of an injection nozzle provided at the tip of a heating cylinder, the power density of the heater on the front side and the rear side of the injection nozzle is made different. A nozzle heating device for injection molding machines.
【請求項2】 ヒータは前側と後側の巻回密度を異なら
せたコイル状ヒータであることを特徴とする請求項1記
載の射出成形機のノズル加熱装置。
2. The nozzle heating device for an injection molding machine according to claim 1, wherein the heater is a coil-shaped heater having different winding densities on the front side and the rear side.
【請求項3】 ヒータは前側と後側の巻線密度を異なら
せたバンドヒータであることを特徴とする請求項1記載
の射出成形機のノズル加熱装置。
3. The nozzle heating device for an injection molding machine according to claim 1, wherein the heater is a band heater having different winding densities on the front side and the rear side.
【請求項4】 ヒータの電力密度は前側を大きく、後側
を小さく設定することを特徴とする請求項1記載の射出
成形機のノズル加熱装置。
4. The nozzle heating apparatus for an injection molding machine according to claim 1, wherein the power density of the heater is set to be large on the front side and small on the rear side.
【請求項5】 ヒータの電力密度は前側を小さく、後側
を大きく設定することを特徴とする請求項1記載の射出
成形機のノズル加熱装置。
5. The nozzle heating device for an injection molding machine according to claim 1, wherein the power density of the heater is set to be small on the front side and large on the rear side.
【請求項6】 射出ノズルにおける異なる電力密度の境
界には断熱部を設けることを特徴とする請求項1記載の
射出成形機のノズル加熱装置。
6. The nozzle heating device for an injection molding machine according to claim 1, wherein a heat insulating portion is provided at a boundary between different power densities in the injection nozzle.
【請求項7】 断熱部は射出ノズルの周面に設けた凹溝
であることを特徴とする請求項6記載の射出成形機のノ
ズル加熱装置。
7. The nozzle heating device for an injection molding machine according to claim 6, wherein the heat insulating portion is a concave groove provided on the peripheral surface of the injection nozzle.
JP1991113090U 1991-12-27 1991-12-27 Nozzle heating device for injection molding machine Expired - Fee Related JP2509297Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1991113090U JP2509297Y2 (en) 1991-12-27 1991-12-27 Nozzle heating device for injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1991113090U JP2509297Y2 (en) 1991-12-27 1991-12-27 Nozzle heating device for injection molding machine

Publications (2)

Publication Number Publication Date
JPH0556418U true JPH0556418U (en) 1993-07-27
JP2509297Y2 JP2509297Y2 (en) 1996-08-28

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ID=14603230

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2509297Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006175828A (en) * 2004-12-24 2006-07-06 Toyota Boshoku Corp Nozzle for injection molding and injection molding apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063888A (en) * 1983-09-19 1985-04-12 日本電気株式会社 Winding type electric furnace
JPS60206612A (en) * 1984-03-31 1985-10-18 Shigeru Tsutsumi Runnerless injection molding and hot runner
JPS63154210U (en) * 1987-03-31 1988-10-11
JPH0255114A (en) * 1988-08-18 1990-02-23 Nissei Plastics Ind Co Heating apparatus of injection molding machine
JP3004015U (en) * 1994-05-10 1994-11-08 怜一朗 高島 Mattress pad

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063888A (en) * 1983-09-19 1985-04-12 日本電気株式会社 Winding type electric furnace
JPS60206612A (en) * 1984-03-31 1985-10-18 Shigeru Tsutsumi Runnerless injection molding and hot runner
JPS63154210U (en) * 1987-03-31 1988-10-11
JPH0255114A (en) * 1988-08-18 1990-02-23 Nissei Plastics Ind Co Heating apparatus of injection molding machine
JP3004015U (en) * 1994-05-10 1994-11-08 怜一朗 高島 Mattress pad

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006175828A (en) * 2004-12-24 2006-07-06 Toyota Boshoku Corp Nozzle for injection molding and injection molding apparatus

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