JP2006341421A - Injection molding system and injection molding method using the same - Google Patents

Injection molding system and injection molding method using the same Download PDF

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JP2006341421A
JP2006341421A JP2005167875A JP2005167875A JP2006341421A JP 2006341421 A JP2006341421 A JP 2006341421A JP 2005167875 A JP2005167875 A JP 2005167875A JP 2005167875 A JP2005167875 A JP 2005167875A JP 2006341421 A JP2006341421 A JP 2006341421A
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injection molding
injection
mold
molten resin
resin
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Takashi Sanada
隆 眞田
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Sumitomo Chemical Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide an injection molding system advantageous from an economical aspect, capable of injecting a molten resin at a high speed to shorten a filling time and capable of manufacturing a large sized thin-walled resin product of good quality, and an injection molding method using it. <P>SOLUTION: In the injection molding system having a branch mechanism 4 between an injection molding device and a mold having a plurality of sprues and a plurality of gates, the branch mechanism 4 has branch flow channels in which the molten resin is injected and the valve mechanisms 6 provided to the leading ends of the branch flow channels. Each of the valve mechanisms has a mechanism for adjusting the opening degree of each of the valves provided to the leading ends of the branch flow channels to control the injection speed of the molten resin to each of the gates from each of the valves corresponding to the elapse of time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、射出成形システムおよびそれを用いる射出成形方法に関するものである。特に、自動車のバンパー、インストゥルメンタルパネルやドアパネルのような大型薄肉の樹脂製品を、品質良く製造することができる射出成形システムおよびそれを用いる射出成形方法に関するものである。   The present invention relates to an injection molding system and an injection molding method using the same. In particular, the present invention relates to an injection molding system capable of manufacturing a large thin resin product such as a bumper, an instrument panel or a door panel of an automobile with high quality and an injection molding method using the same.

従来から、大型薄肉の樹脂製品を製造する方法としては、射出ユニットからランナ及び複数のゲートを介して金型のキャビティ内に溶融樹脂を射出注入可能な射出成形装置を使用し、各ゲートへの注入開始順序を予め定め、この順序に従って各ゲートから溶融樹脂をキャビティ内へ順次注入する射出成形方法が知られている。   Conventionally, as a method of manufacturing a large thin resin product, an injection molding apparatus capable of injecting molten resin into a mold cavity from an injection unit through a runner and a plurality of gates is used. There is known an injection molding method in which an injection start order is determined in advance and molten resin is sequentially injected from each gate into a cavity according to this order.

例えば、特開平6−64003号公報には、比較的大型で薄肉の樹脂製品を、ウェルドマークやフローマークを生じることなく成形することを目的として、同一の樹脂供給路から複数の樹脂注入部に溶融樹脂を分配・供給すると共に、複数の樹脂注入部からあらかじめ定めた注入順位に従って溶融樹脂をキャビティに射出注入して樹脂製品を成形する際に、先行順位の樹脂注入部から注入された溶融樹脂が、後順位の樹脂注入部の位置に達した後に、後順位の樹脂注入部からの溶融樹脂の射出注入を開始し、この時、先行順位の樹脂注入部と後順位の樹脂注入部とに、樹脂供給路を介して分配・供給される溶融樹脂の総量を増加せしめるようにする射出成形方法が記載されている。   For example, Japanese Patent Laid-Open No. 6-64003 discloses a relatively large and thin resin product from the same resin supply path to a plurality of resin injection portions for the purpose of forming a weld mark and a flow mark without generating a weld mark or a flow mark. When the molten resin is distributed and supplied, and the resin product is molded by injecting and injecting the molten resin into the cavity according to a predetermined injection order from a plurality of resin injection parts, the molten resin injected from the preceding resin injection part However, after reaching the position of the rear order resin injection portion, the injection injection of the molten resin from the rear order resin injection portion is started. An injection molding method is described in which the total amount of molten resin distributed and supplied via the resin supply path is increased.

また、特開平6−254895号公報には、金型内のキャビティに複数のゲートから所定の順位で溶融樹脂を射出注入してバンパー等の比較的大型で薄肉の樹脂製品を射出成形する場合に、ウェウルドマークや反り等の発生を防止することを目的として、第1順位のゲートからキャビティ内に射出注入された溶融樹脂の流頭が第2順位のゲートの位置に達した後に第2順位のゲートからキャビティ内に溶融樹脂を射出注入して、第2順位のゲートからの溶融樹脂を、第1順位のゲートからの溶融樹脂内部からその流頭の外方に湧出させつつキャビティ内に拡散せしめるようにする射出成形方法が記載されている。   Japanese Patent Laid-Open No. 6-254895 discloses a case where a relatively large and thin resin product such as a bumper is injection-molded by injecting molten resin into a cavity in a mold in a predetermined order from a plurality of gates. For the purpose of preventing the occurrence of a weld mark, warpage, etc., the second order after the flow of molten resin injected into the cavity from the first order gate reaches the position of the second order gate. The molten resin is injected and injected into the cavity from the first gate, and the molten resin from the second rank gate is diffused into the cavity while flowing out from the inside of the molten resin from the first rank gate. An injection molding method is described which causes the caulking.

そして、特開2001−54924号公報には、充填時間を短縮化させて良好な品質の製品を得ることを目的として、注入開始順序の第1順位に定めた第1ゲートからの樹脂注入を開始した後、第1ゲート近傍におけるキャビティ内の型内圧力を検出し、検出した型内圧力が予め定めた圧力変動パターンに一致するように射出ユニットの射出圧力を制御する射出成形方法が記載されている。   Japanese Patent Laid-Open No. 2001-54924 starts resin injection from the first gate, which is defined as the first order in the injection start order, in order to shorten the filling time and obtain a product of good quality. After that, an injection molding method is described in which the pressure inside the mold in the vicinity of the first gate is detected and the injection pressure of the injection unit is controlled so that the detected pressure inside the mold matches a predetermined pressure fluctuation pattern. Yes.

特開平6−64003号公報JP-A-6-64003 特開平6−254895号公報JP-A-6-254895 特開2001−54924号公報JP 2001-54924 A

近年では、樹脂製品をより薄肉化すること、幅広の樹脂製品を製造することや、突出部、湾曲部等を含む複雑な形状を有する樹脂製品を製造することが求められている。そして、このような製品を射出成形方法によって製造する場合、製造の際に生じる樹脂製品にウェルドマークや、歪み、反り、波うち等の変形を防止しなければならない。これらを防止するためには、できるだけ溶融樹脂を高速で射出して充填時間を短縮化することによって、圧力を低減させると共に、樹脂注入の妨げとなるスキン層の生成を低減させ、キャビティ内の圧力分布を均一に維持する方法が考えられる。   In recent years, it has been required to make a resin product thinner, to manufacture a wide resin product, and to manufacture a resin product having a complicated shape including a protruding portion, a curved portion, and the like. When such a product is manufactured by an injection molding method, it is necessary to prevent deformation such as a weld mark, distortion, warpage, and waviness in the resin product generated during the manufacturing. In order to prevent these problems, the pressure in the cavity is reduced by reducing the pressure by injecting the molten resin as fast as possible to shorten the filling time, and reducing the generation of skin layers that hinder resin injection. A method for maintaining a uniform distribution is conceivable.

その方法としては、例えば、上記の特許公開公報等に記載されている方法であって、金型内で流路を分岐し、さらに各々の流路から注入される溶融樹脂の流動を開閉弁によって制御しながら、射出成形を行う方法が知られている。
しかし、複数の金型でこのような成形を行う場合には、各々の金型内に、分岐と開閉弁を組み込まねばならず、経済的な負担が多くなる。
The method is, for example, a method described in the above-mentioned patent publications, etc., and the flow path of the molten resin injected from each flow path is branched by an on-off valve. A method of performing injection molding while controlling is known.
However, when such molding is performed using a plurality of molds, a branch and an on-off valve must be incorporated in each mold, increasing the economic burden.

また、上記の特許公開公報等に記載されている方法では、各々の流路から注入される溶融樹脂の流動の制御は、
射出成形機の射出パターンに合わせて、複数のゲートの開閉弁を開閉するだけであるため、制御できる範囲が限られており、必ずしも満足できる品質の製品が、得られない場合もあった。
Further, in the method described in the above patent publications and the like, the control of the flow of the molten resin injected from each flow path is as follows:
Since only the opening / closing valves of the plurality of gates are opened / closed in accordance with the injection pattern of the injection molding machine, the controllable range is limited, and a product with satisfactory quality may not always be obtained.

かかる状況の下、本発明の目的は、経済的に有利で、溶融樹脂を高速で射出して充填時間を短縮化することができ、大型薄肉の樹脂製品を、品質良く製造することができる射出成形システムおよびそれを用いる射出成形方法を提供することにある。   Under such circumstances, the object of the present invention is economically advantageous, injection that can inject molten resin at high speed to shorten the filling time, and can produce large thin resin products with high quality. An object of the present invention is to provide a molding system and an injection molding method using the same.

本発明者は、検討の結果、本発明が、上記の課題を解決できることを見出し、本発明を完成させるに至った。
すなわち、本発明は、
射出成形装置と複数のスプルーおよび複数のゲートを有する金型との間に、分岐機構を有する射出成形システムであって、前記分岐機構が、溶融樹脂が注入する分岐した流路と分岐した流路の先端に設けられたバルブ機構とを有する分岐機構である射出成形システムおよびそれを用いる射出成形方法に係るものである。
As a result of studies, the present inventor has found that the present invention can solve the above-mentioned problems, and has completed the present invention.
That is, the present invention
An injection molding system having a branching mechanism between an injection molding device and a mold having a plurality of sprues and a plurality of gates, wherein the branching mechanism branches and a branching channel into which molten resin is injected The present invention relates to an injection molding system that is a branching mechanism having a valve mechanism provided at the tip of the nozzle and an injection molding method using the same.

本発明によれば、特に、自動車のバンパー、インストゥルメンタルパネルやドアパネルのような大型薄肉の樹脂製品を、品質良く製造することができる。   According to the present invention, in particular, large thin resin products such as automobile bumpers, instrument panels and door panels can be manufactured with high quality.

本発明の射出成形システムは、射出成形装置と複数のスプルーおよび複数のゲートを有する金型との間に、溶融樹脂が注入する分岐した流路と分岐した流路の先端に設けられたバルブ機構とを有する分岐機構を有する射出成形システムである。   The injection molding system according to the present invention includes a branched flow path for injecting molten resin and a valve mechanism provided at the tip of the branched flow path between an injection molding apparatus and a mold having a plurality of sprues and a plurality of gates. Is an injection molding system having a branching mechanism.

前記の分岐機構によって、少ない数の射出成形装置から、金型へ溶融樹脂を注入する際に、溶融樹脂を多くの流路に分岐させ、注入させることができ、これによって、金型内の圧力を大幅に低減できる。   When the molten resin is injected into the mold from a small number of injection molding devices by the branch mechanism, the molten resin can be branched into a large number of flow paths and injected, thereby increasing the pressure in the mold. Can be greatly reduced.

また、前記の分岐機構が有する分岐した流路の先端に設けられたバルブ機構は、バルブの開度を調整する機構を有していることから、単に射出成形機の射出動作を制御するだけよりも、多様な金型内の樹脂の流動状態を実現することができる。   In addition, the valve mechanism provided at the tip of the branched flow path of the branch mechanism has a mechanism for adjusting the opening of the valve, so that the injection operation of the injection molding machine is simply controlled. However, it is possible to realize the fluid state of the resin in various molds.

前記の分岐機構が有するバルブ調整機構を用いることによって、従来の射出成形機の射出制御に加え、金型内に注入される溶融樹脂の順序や流速を調整して、金型内の溶融樹脂の流動状態を制御することができ、ウエルド位置の制御、充填に必要は射出圧力の低減やバリの抑制を従来の方法より、より幅広い範囲で行うことができる。   By using the valve adjusting mechanism of the branch mechanism, in addition to the injection control of the conventional injection molding machine, the order and flow rate of the molten resin injected into the mold are adjusted, and the molten resin in the mold is adjusted. The flow state can be controlled, and the injection pressure can be reduced and the burrs can be reduced in a wider range than the conventional methods as necessary for the control and filling of the weld position.

溶融樹脂は、前記の分岐機構の内部で、ヒーターを用いて加熱され、溶融樹脂の融点以上であり、通常の成形サイクルにおいて過度の劣化が生じない温度以下に、溶融樹脂の温度を制御することによって、連続成形に耐えうる程度の溶融状態に保持されている。   The molten resin is heated using a heater inside the branch mechanism, and the temperature of the molten resin is controlled to a temperature not lower than the melting point of the molten resin and not causing excessive deterioration in a normal molding cycle. Therefore, it is maintained in a molten state that can withstand continuous molding.

本発明の射出成形システムが有する分岐機構は、射出成形装置の射出シリンダーと金型の間に取り付けて使用される。形状はいかなるものであってもよく、金型の種々の場所から、溶融樹脂を注入する必要がある場合は、形状としては、分岐した管状のものが好ましい。   The branching mechanism of the injection molding system of the present invention is used by being attached between an injection cylinder and a mold of an injection molding apparatus. The shape may be any shape, and when it is necessary to inject molten resin from various locations of the mold, the shape is preferably a branched tubular shape.

また、金型の一方から分岐し注入するだけで、に分岐して注入する効果が十分に得られる場合は、金型に分岐機構を取り付け機構としては、分岐機構の一方に設けられた射出成形機の射出シリンダーの固定側プレートに取り付ける機構と、他方に設けられた射出成形機の固定側プレートと金型とを取り付ける従来と同様の機構が挙げられる。   If the effect of branching and injecting can be obtained simply by branching and injecting from one side of the mold, the injection mechanism provided on one side of the branching mechanism is used as a mechanism for attaching the branching mechanism to the mold. There are a mechanism for attaching to the stationary side plate of the injection cylinder of the machine and a mechanism similar to the conventional mechanism for attaching the stationary side plate and mold of the injection molding machine provided on the other side.

前記の分岐機構が有する分岐した流路の先端に設けられたバルブ機構は、分岐機構の金型に取り付られる側であってもよく、分岐した流路の途中にあってもよい。前記のバルブ機構を制御する方法は、分岐した流路ごとに制御する方法が望ましく、経済的な理由や制御上の理由から、いくつかの分岐した流路をまとめて制御する方法であってもよい。   The valve mechanism provided at the tip of the branched flow path included in the branch mechanism may be on the side attached to the mold of the branch mechanism, or may be in the middle of the branched flow path. The method for controlling the valve mechanism is preferably a method for controlling each branched flow path, and for economic reasons or control reasons, it may be a method for controlling several branched flow paths collectively. Good.

本発明の射出成形システムを用いた射出成形方法は、種々の方法が挙げられ、例えば、次の方法が挙げられる。
注入開始順序の第1順位に定められた第1ゲートから樹脂注入を開始し、溶融樹脂の流頭が第2順位以降に定められたゲート(後順位ゲート)まで達した段階で、第2順位以降のゲートのバルブを開放して樹脂の注入を開始する。また、キャビティ内の第1ゲート近傍では、第1ゲートから樹脂の注入が開始された後、所定の圧力検出手段によってキャビティ内の型内圧力(溶融樹脂の圧力)を検出する。そして、検出した型内圧力が所定の圧力変動パターンに一致するように第1ゲートのバルブ開度を制御(フィードバック制御)する。さらに場合によっては、射出圧力、射出速度の制御も合わせえ行うことによって、広範囲の最適化が可能になる。
Examples of the injection molding method using the injection molding system of the present invention include various methods, for example, the following methods.
Resin injection is started from the first gate determined in the first order of the injection start order, and the second order is reached when the molten resin flow reaches the gate (subsequent order gate) determined after the second order. Subsequent gate valves are opened and resin injection is started. Further, in the vicinity of the first gate in the cavity, after the resin injection is started from the first gate, the pressure in the mold (pressure of the molten resin) in the cavity is detected by a predetermined pressure detecting means. Then, the valve opening degree of the first gate is controlled (feedback control) so that the detected in-mold pressure matches a predetermined pressure fluctuation pattern. Further, depending on the case, it is possible to optimize a wide range by controlling the injection pressure and the injection speed together.

これらの射出圧力の変動パターンは成形の開始に先立って予め定めておき、樹脂製品の形状、サイズ等に応じて、種々のパターンを採用することができ、例えば、型内圧力を一定の時間だけ所定値に維持するパターンや、時間の経過と共に型内圧力を二次曲線状に変化させるパターン等を採用することができる。   These injection pressure fluctuation patterns are determined in advance prior to the start of molding, and various patterns can be adopted according to the shape, size, etc. of the resin product. A pattern that maintains a predetermined value, a pattern that changes the in-mold pressure into a quadratic curve with time, and the like can be employed.

複数のゲートを用いて、多段の射出を行う場合で、単純なフィードバック制御では、射出パターンの設計が困難な場合は、例えば、特開2005−007860号公報に記載されている自己収束型の射出パターン最適化プログラムを用いて、事前に解析して得られる製造パラメータを用いて制御する方法が好ましい。前記の自己収束型の射出パターン最適化プログラムは、例えば、キャビティへ複数の樹脂流入路を有する金型を用いて射出成形を行なう場合に、ウエルドの発生を制御するために、樹脂流入路からの溶融樹脂の流入量を、時間の経過に応じて設定される製造パラメータを、射出成形過程を計算する数値解析手法と計算機支援による最適化手法との組み合わせによって求めることができる自己収束型の射出パターン最適化プログラムである。   When multiple stages of injection are performed using a plurality of gates and it is difficult to design an injection pattern with simple feedback control, for example, a self-convergence type injection described in JP-A-2005-007860 A method of controlling using a manufacturing parameter obtained by analyzing in advance using a pattern optimization program is preferable. The self-converging type injection pattern optimization program, for example, in order to control the occurrence of welds when performing injection molding using a mold having a plurality of resin inflow paths to a cavity, Self-converging injection pattern that can determine the inflow of molten resin, manufacturing parameters set over time, and a combination of numerical analysis methods that calculate the injection molding process and computer-aided optimization methods It is an optimization program.

一般に、幅広の樹脂製品、突出部や湾曲部を含む複雑な形状を有する樹脂製品を射出成形によって製造する場合、キャビティ内の端部、突出部および湾曲部には、溶融樹脂を注入し難く、いわゆるショートショットが発生しやすい。このショートショットの発生を抑えるために、従来は、ランナを延長し、ゲートを増設することによって対処していたが、設備コストが増大し、金型も複雑な形状となってしまう。
これに対して、本発明の射出成形方法によれば、第1ゲートから溶融樹脂を注入した後、後順位ゲートから溶融樹脂を注入するように、バルブ機構で調整したり、注入を停止するタイミングを各ゲートごとに調整することによって、キャビティ内の端部、突出部および湾曲部にも、溶融樹脂を容易かつ確実に充填することが可能となり、かつ、設備コストの増大や金型の複雑化等を抑制することができる。
In general, when a resin product having a complicated shape including a wide resin product and a protruding portion or a curved portion is manufactured by injection molding, it is difficult to inject molten resin into the end portion, the protruding portion, and the curved portion in the cavity. So-called short shots are likely to occur. Conventionally, in order to suppress the occurrence of this short shot, the runner is extended and gates are added. However, the equipment cost is increased and the mold has a complicated shape.
On the other hand, according to the injection molding method of the present invention, after the molten resin is injected from the first gate, the adjustment is made by the valve mechanism so that the molten resin is injected from the subsequent gate, or the timing at which the injection is stopped. By adjusting the gate for each gate, it is possible to easily and reliably fill the ends, protrusions, and curved parts in the cavity with molten resin, and increase the equipment cost and make the mold complicated Etc. can be suppressed.

本発明の射出成形システムを使用するにあたり、キャビティ内の型内圧力を検出する型内圧検出手段を金型内の各所に組み込んでおくと、前述のように計算等で求めた射出パターンを、目的にあわせて最適に制御することが可能となる.   In using the injection molding system of the present invention, if the in-mold pressure detecting means for detecting the in-mold pressure in the cavity is incorporated in various places in the mold, the injection pattern obtained by calculation or the like as described above is used for the purpose. It becomes possible to control optimally according to.

本発明の射出成形システムを用いれば、複数のゲートを持つことによって、型内圧を大幅に下げることができるとともに、キャビティ内の圧力分布を均一に維持することができるため、樹脂成形品のバリ、波うち、ウェルドマーク、反り等の発生を低減させることが可能となる。   By using the injection molding system of the present invention, by having a plurality of gates, the pressure inside the mold can be greatly reduced and the pressure distribution in the cavity can be maintained uniformly. Of the waves, it is possible to reduce the occurrence of weld marks, warpage, and the like.

また、本発明で用いられる分岐機構を、金型ひとつひとつに作りこむ場合や、射出成形装置本体に作りこむ場合に比べて、さらに、時間の経過に応じていくつもの金型や数多くの種々の射出成形装置を用いるシステムを確立することに比べて、経済的に有利である。   In addition, as compared with the case where the branching mechanism used in the present invention is built in each mold or in the injection molding apparatus main body, a number of molds and a number of various injections are used as time elapses. It is economically advantageous compared to establishing a system using a molding apparatus.

本発明の射出成形システムの好適な実施態様を、図1および図2に示す。
図1は、射出成形装置と金型の間に分岐機構を有する射出成形機の図であり、
(1)射出成形機ホッパー、
(2)射出シリンダー、
(3)固定側プレート、
(4)分岐機構、
(5)ヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路、
(6)各々の分岐部の射出流量を制御するバルブ、
(7)金型(多点の流路入り口(ゲート)を持つ金型)、
(8)移動側プレート、
(9)型締め、可動ユニット
から構成される。
A preferred embodiment of the injection molding system of the present invention is shown in FIGS.
FIG. 1 is a diagram of an injection molding machine having a branching mechanism between an injection molding device and a mold,
(1) Injection molding machine hopper,
(2) Injection cylinder,
(3) Fixed side plate,
(4) Branch mechanism,
(5) A flow path of a molten resin, the temperature of which is controlled above the melting point of the resin by a heater,
(6) A valve for controlling the injection flow rate of each branch part,
(7) Mold (mold with multi-point channel entrance (gate)),
(8) Moving side plate,
(9) Mold clamping and movable unit.

射出成形機ホッパー(1)から投入された樹脂は、射出シリンダー(2)で溶融混練され、固定側プレート(3)に取り付けられた分岐機構(4)のヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路(5)へ注入される。
そして、流路(5)へ注入された溶融樹脂は、分岐した流路を通り、分岐した流路の先端に設けられた各々の分岐部の射出流量を制御するバルブ(6)から、型締め、可動ユニット(9)の移動側プレート(8)に取り付けられた金型(多点の流路入り口(ゲート)を持つ金型)(7)へ注入される。
The resin charged from the injection molding machine hopper (1) is melted and kneaded by the injection cylinder (2), and the temperature is controlled above the melting point of the resin by the heater of the branch mechanism (4) attached to the fixed side plate (3). The molten resin is poured into the flow path (5).
The molten resin injected into the flow path (5) passes through the branched flow path and is clamped from the valve (6) for controlling the injection flow rate of each branch portion provided at the tip of the branched flow path. Then, it is injected into a mold (mold having a multi-point flow path entrance (gate)) (7) attached to the moving side plate (8) of the movable unit (9).

図2は、本発明で用いられる分岐機構の概念図であり、
(10)ヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路、
(11)各々の分岐部の射出流量を制御するバルブ、
(12)本分岐機構への樹脂の流入口
から構成される。
FIG. 2 is a conceptual diagram of a branching mechanism used in the present invention.
(10) A flow path of a molten resin, the temperature of which is controlled by a heater above the melting point of the resin,
(11) A valve for controlling the injection flow rate of each branch part,
(12) Consists of a resin inlet to the branch mechanism.

溶融樹脂は、本分岐機構への樹脂の流入口(12)から注入され、ヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路(10)を通り、分岐した流路の先端に設けられた各々の分岐部の射出流量を制御するバルブ(11)へ流動し、バルブ(11)から金型へ注入される。   The molten resin is injected from the resin inlet (12) to the branching mechanism, passes through the molten resin flow path (10) controlled by the heater to a temperature equal to or higher than the melting point of the resin, and is provided at the tip of the branched flow path. It flows to a valve (11) that controls the injection flow rate of each branch portion, and is injected from the valve (11) into the mold.

図2に示すような分岐機構を、図1に示すように、射出成形装置と金型の間に取り付け、予め、自己収束型の射出パターン最適化プログラムを用いて解析した結果から得られた製造パラメータを用いて制御することによって、広く経済的に有利で、溶融樹脂を高速で射出して充填時間を短縮化することができ、大型薄肉の樹脂製品を、品質良く製造することができる。   As shown in FIG. 1, a branching mechanism as shown in FIG. 2 is attached between the injection molding apparatus and the mold, and is obtained from the result of analysis using a self-converging injection pattern optimization program in advance. By controlling using parameters, it is widely and economically advantageous, the molten resin can be injected at high speed to shorten the filling time, and a large thin resin product can be manufactured with high quality.

具射出成形装置と金型の間に分岐機構を有する射出成形機の図Figure of injection molding machine with branch mechanism between tool injection molding device and mold 分岐機構の概念図Conceptual diagram of branching mechanism

符号の説明Explanation of symbols

1 射出成形機ホッパー
2 射出シリンダー
3 固定側プレート
4 分岐機構
5 ヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路
6 各々の分岐部の射出流量を制御するバルブ
7 金型(多点の流路入り口(ゲート)を持つ金型)
8 移動側プレート
9 型締め、可動ユニット
10 ヒーターによって樹脂の融点以上に温度制御された溶融樹脂の流路
11 各々の分岐部の射出流量を制御するバルブ
12 本分岐機構への樹脂の流入口
DESCRIPTION OF SYMBOLS 1 Injection molding machine hopper 2 Injection cylinder 3 Fixed side plate 4 Branching mechanism 5 Flow path of molten resin temperature-controlled above the melting point of the resin by a heater 6 Valve for controlling the injection flow rate of each branch 7 Die with flow path entrance (gate)
8 Moving-side plate 9 Mold clamping, movable unit 10 Molten resin flow path whose temperature is controlled above the melting point of the resin by the heater 11 Valve for controlling the injection flow rate of each branching part 12 Resin inlet to the branching mechanism

Claims (4)

射出成形装置と複数のスプルーおよび複数のゲートを有する金型との間に、分岐機構を有する射出成形システムであって、前記分岐機構が、溶融樹脂が注入する分岐した流路と分岐した流路の先端に設けられたバルブ機構とを有する分岐機構である射出成形システム。   An injection molding system having a branching mechanism between an injection molding apparatus and a mold having a plurality of sprues and a plurality of gates, wherein the branching mechanism has a branched channel and a branched channel into which molten resin is injected. An injection molding system which is a branching mechanism having a valve mechanism provided at the tip of the valve. バルブ機構が、分岐した流路の先端に設けられたバルブの開度を調整する機構を有するバルブ機構であって、各バルブから各ゲートへの溶融樹脂の注入速度を、時間の経過に応じて制御することができる請求項1に記載の射出成形システム。   The valve mechanism has a mechanism for adjusting the opening degree of the valve provided at the tip of the branched flow path, and the injection rate of the molten resin from each valve to each gate is changed according to the passage of time. The injection molding system according to claim 1, which can be controlled. 射出成形装置の射出シリンダーの固定側プレートと金型の間に取り付けて使用される分岐機構であって、分岐機構の一方に前記固定側プレートへの取り付け機構を有し、他方に、金型への取り付け機構を有する請求項1に記載の射出成形システム。   A branch mechanism that is used by being attached between a fixed side plate and a mold of an injection cylinder of an injection molding apparatus, wherein one of the branch mechanisms has an attachment mechanism to the fixed side plate, and the other is to a mold The injection molding system according to claim 1, comprising an attachment mechanism. キャビティへ複数の樹脂流入路を有する金型を用い、前記樹脂流入路への溶融樹脂の流入量を、時間の経過に応じて設定された製造パラメータによって制御する請求項1記載の射出成形システムを用いる射出成形方法であって、前記製造パラメータが、事前に自己収束型の射出パターン最適化プログラムを用いた解析結果から得られた製造パラメータである射出成形方法。   The injection molding system according to claim 1, wherein a mold having a plurality of resin inflow passages is used for the cavity, and the amount of molten resin inflow into the resin inflow passages is controlled by manufacturing parameters set according to the passage of time. An injection molding method to be used, wherein the manufacturing parameter is a manufacturing parameter obtained in advance from an analysis result using a self-convergent injection pattern optimization program.
JP2005167875A 2005-06-08 2005-06-08 Injection molding system and injection molding method using the same Pending JP2006341421A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180026511A (en) * 2015-07-09 2018-03-12 케이료 패키징 에스에이 Process for producing a polyester-based polymer article

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180026511A (en) * 2015-07-09 2018-03-12 케이료 패키징 에스에이 Process for producing a polyester-based polymer article
JP2018520918A (en) * 2015-07-09 2018-08-02 ケイリョー パッケージング ソシエテ アノニムKeiryo Packaging SA Process for the production of polyester-based polymer articles
KR102632723B1 (en) * 2015-07-09 2024-02-02 케이료 패키징 에스에이 Method for making polyester-based polymer articles

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