JP5240815B2 - Method for controlling raw material supply in plasticizing apparatus - Google Patents

Method for controlling raw material supply in plasticizing apparatus Download PDF

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JP5240815B2
JP5240815B2 JP2007231480A JP2007231480A JP5240815B2 JP 5240815 B2 JP5240815 B2 JP 5240815B2 JP 2007231480 A JP2007231480 A JP 2007231480A JP 2007231480 A JP2007231480 A JP 2007231480A JP 5240815 B2 JP5240815 B2 JP 5240815B2
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raw material
material supply
supply amount
plasticizing
screw
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JP2009061674A (en
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一也 阿南
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株式会社名機製作所
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    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92333—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92542—Energy, power, electric current or voltage
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92866—Inlet shaft or slot, e.g. passive hopper; Injector, e.g. injector nozzle on barrel
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

本発明は、減圧した加熱筒内へ原料供給手段から供給する原料を可塑化する際に発生する水分やガス分を吸引し排出するように構成した可塑化装置の原料供給量の制御方法に関するものである。   The present invention relates to a method for controlling a material supply amount of a plasticizer configured to suck and discharge moisture and gas generated when plasticizing a material supplied from a material supply means into a decompressed heating cylinder. It is.

上記技術分野の可塑化装置は、例えば、特許文献１に開示されている。特許文献１において、原料供給量の制御に関して、「このときの当該定量フィーダ機構による原料供給、より具体的には前記可塑化部のフィードゾーンに対する原料供給は、操作盤ボックスに設けられた各種スイッチ類の操作によって微調整可能となっており、前記可塑化部における１ショットにて成形される成形品に対応した定量の原料を間欠的に供給することによって、いわゆる「飢餓的成形」が実現されるように構成されている。「飢餓的成形」は、前記可塑化部の可塑化シリンダーにおけるフィードゾーンに適宜のガス抜き空隙を常時形成するように維持しつつメインスクリューに対して原料供給を行うものであり、加熱された原料から可塑化シリンダー内に発生した水分やガスを上述したガス抜き空隙から原料供給口を通して機外に排出する構成になされている。」との記載がある。   A plasticizing apparatus in the above technical field is disclosed in, for example, Patent Document 1. In Patent Document 1, regarding the control of the raw material supply amount, “the raw material supply by the quantitative feeder mechanism at this time, more specifically, the raw material supply to the feed zone of the plasticizing section is various switches provided in the operation panel box. It can be fine-tuned by a kind of operation, and so-called “starved molding” is realized by intermittently supplying a fixed amount of raw material corresponding to a molded product molded in one shot in the plasticizing section. It is comprised so that. “Starvation molding” is a method of supplying a raw material to a main screw while maintaining an appropriate degassing space in a feed zone in a plasticizing cylinder of the plasticizing part. The water and gas generated in the plasticizing cylinder are discharged from the above-mentioned gas vent gap to the outside through the raw material supply port. Is described.

しかしながら、前記飢餓的成形を実現するための原料供給量の設定は、特許文献１に記載のＣＣＤカメラが設けられていたとしても、数成形サイクルにわたって試行錯誤を繰り返しながら求める必要があり、原料と時間を浪費することになる。   However, the setting of the raw material supply amount for realizing the starvation molding needs to be obtained while repeating trial and error over several molding cycles even if the CCD camera described in Patent Document 1 is provided. Time is wasted.

特開２００６−６９１４３号公報（段落００１９）JP 2006-69143 A (paragraph 0019)

本発明は、上記した問題を解決すべくなされたものであって、最適な原料供給量が容易に設定可能な可塑化装置の原料供給量の制御方法を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for controlling a raw material supply amount of a plasticizing apparatus in which an optimum raw material supply amount can be easily set.

本発明は、減圧した加熱筒内へ原料供給手段から供給する原料を加熱筒内に設けられたスクリュを用いて可塑化する際に発生する水分やガス分を吸引し排出するように構成した可塑化装置の原料供給量の制御方法であって、ある種類の原料による成形サイクルの可塑化工程において、前記水分やガス分を良好に流通させ、かつ前記可塑化を安定して実行するようにフィードスクリュによる原料供給量が制限されて制御されるとき、前記加熱筒内に設けられたスクリュの回転速度に対応したフィードスクリュによる原料供給量の設定値を金型毎に予め求められた成形条件群のデータとして記憶させ、他の種類の原料による成形サイクルの可塑化工程では、前記記憶された金型毎のフィードスクリュによる原料供給量の設定値に基づいて可塑化を行う可塑化装置の原料供給量の制御方法に関する。
The present invention is a plastic configured to suck and discharge moisture and gas generated when plasticizing a raw material supplied from a raw material supply means into a decompressed heating cylinder using a screw provided in the heating cylinder. A method for controlling the amount of raw material supplied to a liquefying apparatus, in a plasticizing step of a molding cycle using a certain type of raw material, in which the water and gas components are distributed well and the plasticization is performed stably. A set of molding conditions in which a set value of the raw material supply amount by the feed screw corresponding to the rotational speed of the screw provided in the heating cylinder is previously determined for each die when the raw material supply amount by the screw is limited and controlled. of it is stored as data, in the plasticizing step of molding cycle by other types of raw materials, a plasticizing based on the set value of the material supply amount of the feed screw for each of the stored mold Cormorant method of controlling the material supply amount of the plasticizing device.

本発明における可塑化装置の原料供給量の制御方法によれば、最適な原料供給量が容易に設定可能となる。   According to the control method of the raw material supply amount of the plasticizer in the present invention, the optimal raw material supply amount can be easily set.

図面に基づいて、本発明の実施の形態を詳細に説明する。図１は、本発明の可塑化装置の原料供給量の制御方法を実施する可塑化装置の縦断面図とブロック図である。   Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view and a block diagram of a plasticizing apparatus that implements a method for controlling the amount of raw material supplied to the plasticizing apparatus of the present invention.

可塑化装置１は、先端面にノズル６を螺着した加熱筒４と、加熱筒４の内孔に回転往復動可能に嵌挿したスクリュ５と、スクリュ５を前後進及び回転駆動する射出・回転駆動手段２と、スクリュ５の回転角度及びスクリュ５の移動距離に変換された回転角度を検出するエンコーダ３と、加熱筒４の後部上面に穿孔した上部開口７に原料落下路８を介して配設された原料供給手段１１と、原料供給手段１１の上面に立設したホッパ１４と、ホッパ１４を三に区画する開閉自在のシャッタ１３と、エンコーダ３等の信号を入力部１８に入力し記憶部１９や設定・表示部２０のデータに基づいてＣＰＵ１６でシーケンス処理や演算処理した結果を出力部１７を介して射出・回転駆動手段２、フィードスクリュ駆動手段１０、シャッタ１３等へ出力する制御装置１５とからなる。なお、可塑化装置１は、図示しない型締装置とともに射出成形機を構成するものであるが、射出・回転駆動手段２の射出駆動部及びエンコーダ３の移動距離検出部を削除すれば押出機として機能する。   The plasticizing apparatus 1 includes a heating cylinder 4 having a nozzle 6 screwed to a front end surface thereof, a screw 5 fitted into an inner hole of the heating cylinder 4 so as to be capable of rotating in a reciprocating manner, and an injection / rotation driving the screw 5 forward and backward. The rotation driving means 2, the encoder 3 for detecting the rotation angle converted into the rotation angle of the screw 5 and the movement distance of the screw 5, and the upper opening 7 drilled in the rear upper surface of the heating cylinder 4 through the material dropping path 8 The input raw material supply means 11, the hopper 14 erected on the upper surface of the raw material supply means 11, an openable / closable shutter 13 that divides the hopper 14 into three parts, and signals from the encoder 3 are input to the input unit 18. Based on the data stored in the storage unit 19 and the setting / display unit 20, the results of the sequence processing and arithmetic processing performed by the CPU 16 are output to the injection / rotation driving unit 2, the feed screw driving unit 10, the shutter 13, and the like via the output unit 17. And a control unit 15. The plasticizing apparatus 1 constitutes an injection molding machine together with a mold clamping apparatus (not shown). However, if the injection driving section of the injection / rotation driving means 2 and the movement distance detecting section of the encoder 3 are deleted, the plasticizing apparatus 1 can be used as an extruder. Function.

原料供給手段１１は、フィードスクリュ９と、フィードスクリュ９を回転可能に嵌挿する筒体２１と、フィードスクリュ９を回転駆動するフィードスクリュ回転駆動手段１０とからなる。制御装置１５により所定の回転数で回転駆動されるフィードスクリュ回転駆動手段１０は、フィードスクリュ９を回転駆動して、筒体２１の一方の上面に立設したホッパ１４から落下・供給された原料Ｍを搬送して、筒体２１の他方の下面に設けた原料落下路８から加熱筒４内へ供給する。なお、原料供給手段１１は、フィードスクリュ９を有するものとして例示したが、可変絞り部を有するものとしてもよい。また、ホッパ１４は、シャッタ１３を有するものとして例示したが、回転升を有するものとしてもよい。   The raw material supply means 11 includes a feed screw 9, a cylindrical body 21 into which the feed screw 9 is rotatably inserted, and a feed screw rotation driving means 10 that rotationally drives the feed screw 9. The feed screw rotation driving means 10 that is rotationally driven by the control device 15 at a predetermined number of rotations drives the feed screw 9 to rotate, and the raw material dropped and supplied from the hopper 14 erected on one upper surface of the cylindrical body 21. M is conveyed and supplied into the heating cylinder 4 from the raw material dropping path 8 provided on the other lower surface of the cylinder 21. In addition, although the raw material supply means 11 was illustrated as what has the feed screw 9, it is good also as what has a variable aperture part. Moreover, although the hopper 14 was illustrated as having the shutter 13, it may have a rotating rod.

加熱筒４の上部開口７から加熱筒４内のスクリュ５の溝に落下した原料Ｍは、原料供給手段１１で搬送量が制限されているので、スクリュ５の溝内に粗に堆積する。特に、スクリュ５の後部はフィードゾーンとなっており、それより前方のコンプレッションゾーンやさらにその前方のメータリングゾーンにおける溝深さよりも深くなっている。すなわち、原料Ｍはフィードゾーンからコンプレッションゾーンへ移送されつつ溶融され、スクリュ５の溝深さの減少に応じて容積を減少させてゆく。そして、メータリングゾーンでは原料Ｍはすべて溶融状態の溶融原料となり、メータリングゾーンの浅い溝を充填する。そのため、スクリュ５前部は気密となり、スクリュ５後部は加熱筒４後端部との間のパッキング（図示せず）で気密となり、原料落下路８と原料供給手段１１は気密に連結され、ホッパ１４は交互に開閉するシャッタ１３，１３で原料供給手段１１との間を気密にするので、加熱筒４内は気密に保たれる。そして、筒体２１の原料落下路８上面に真空ポンプからなる真空源１２が接続されているので、加熱筒４内は減圧される。   The raw material M that has dropped from the upper opening 7 of the heating cylinder 4 into the groove of the screw 5 in the heating cylinder 4 is roughly deposited in the groove of the screw 5 because the conveyance amount is limited by the raw material supply means 11. In particular, the rear part of the screw 5 is a feed zone, which is deeper than the groove depth in the compression zone in front of it and further in the metering zone in front of it. That is, the raw material M is melted while being transferred from the feed zone to the compression zone, and the volume is reduced in accordance with a decrease in the groove depth of the screw 5. In the metering zone, all of the raw material M becomes a molten raw material in a molten state, and fills the shallow groove in the metering zone. Therefore, the front part of the screw 5 becomes airtight, the rear part of the screw 5 becomes airtight by packing (not shown) between the rear end part of the heating cylinder 4, and the raw material dropping path 8 and the raw material supply means 11 are connected in an airtight manner. Reference numeral 14 denotes shutters 13 and 13 which are alternately opened and closed to make the space between the material supply means 11 airtight, so that the inside of the heating cylinder 4 is kept airtight. And since the vacuum source 12 which consists of a vacuum pump is connected to the raw material fall path 8 upper surface of the cylinder 21, the inside of the heating cylinder 4 is pressure-reduced.

このように減圧された状況で原料Ｍは可塑化されるので、原料Ｍに包含されていた水分やガス分が溶融過程の原料Ｍから放出される。それらの水分やガス分は、スクリュ５のフィードゾーンの溝を流通して後部へ流動するので、原料Ｍの供給量が制限されて少ないとき程、効果的に水分やガス分を真空源１２に吸引させることができる。ところが、原料Ｍの供給量が制限されて少ないときには、可塑化状態が不安定になり、加熱筒４内のスクリュ５前方に搬送される溶融原料の量が増減し、スクリュ５の後退速度が不安定となる。このようにして可塑化された溶融原料は、その密度や温度が不均一となっており、それを金型へ射出しても良好な成形品は成形されることはない。   Since the raw material M is plasticized under such reduced pressure conditions, moisture and gas components contained in the raw material M are released from the raw material M in the melting process. Since such moisture and gas components flow through the groove of the feed zone of the screw 5 and flow to the rear part, the moisture and gas components are effectively transferred to the vacuum source 12 when the supply amount of the raw material M is limited and small. Can be aspirated. However, when the supply amount of the raw material M is limited and small, the plasticization state becomes unstable, the amount of the molten raw material conveyed in front of the screw 5 in the heating cylinder 4 increases and decreases, and the retraction speed of the screw 5 does not increase. It becomes stable. The molten raw material plasticized in this way has non-uniform density and temperature, and even if it is injected into a mold, a good molded product will not be formed.

そこで、実際の可塑化工程における条件出し制御では、原料落下路８から加熱筒４内を観察したり、スクリュ５の回転駆動力を監視したりして、スクリュ５のフィードゾーンの溝が原料Ｍで充填されない状態を現出させるとともに、可塑化中のスクリュ５の後退速度を観察して、スクリュ５の後退速度が一旦停止する等の不安定な状態にならないような兼ね合い状態を求めるべく、制御装置１５の設定・表示部２０を操作して原料供給手段１１の原料供給量を調節する。そして、このようにして求めた原料供給量の設定値は、同じ種類の原料間で同じとなることは当然であるが、他の種類の原料に適用しても大きく異なることはない。   Therefore, in the condition setting control in the actual plasticizing process, the inside of the heating cylinder 4 is observed from the raw material dropping path 8 or the rotational driving force of the screw 5 is monitored, so that the groove of the feed zone of the screw 5 is the raw material M. In order to reveal the unfilled state and to observe the backward speed of the screw 5 being plasticized, and to obtain a balance state in which the backward speed of the screw 5 does not become unstable such as once stopping. The setting / display unit 20 of the apparatus 15 is operated to adjust the raw material supply amount of the raw material supply means 11. The set value of the raw material supply amount obtained in this way is naturally the same between the same types of raw materials, but does not differ greatly even when applied to other types of raw materials.

制御装置１５の設定・表示部２０における原料供給量の設定は、０から１００％までの任意の数値であり、その数値に基づいてフィードスクリュ９を可塑化のためのスクリュ５の回転速度に同調させて回転駆動制御する。すなわち、原料供給量の設定が１００％のときは、所定の回転速度で回転するスクリュ５が出し得る最大の可塑化量のための原料Ｍを搬送・供給可能なフィードスクリュ９の回転速度が制御され、原料供給量の設定が１００％から低下するに応じて、スクリュ５のフィードゾーンにおける原料Ｍの量が減少して可塑化量は減少してゆく。そして、原料供給量の設定とフィードスクリュ９の回転速度とは比例関係にあり、フィードバック制御で精密に制御されている。このように、フィードスクリュ９は、スクリュ５のフィードゾーンを原料Ｍが充満しないように原料供給量を制限して原料Ｍを搬送するのである。なお、このような原料供給量の設定をスクリュ５の回転速度に同調させた比率の設定であるものとして例示したが、原料供給量の設定をスクリュ５の回転速度とは関連しない単独のものとして設定するようにしてもよい。   The setting of the raw material supply amount in the setting / display unit 20 of the control device 15 is an arbitrary numerical value from 0 to 100%, and the feed screw 9 is synchronized with the rotational speed of the screw 5 for plasticizing based on the numerical value. And rotational drive control. That is, when the raw material supply amount is set to 100%, the rotational speed of the feed screw 9 capable of conveying and supplying the raw material M for the maximum plasticizing amount that can be delivered by the screw 5 rotating at a predetermined rotational speed is controlled. As the setting of the raw material supply amount decreases from 100%, the amount of the raw material M in the feed zone of the screw 5 decreases and the plasticization amount decreases. The setting of the raw material supply amount and the rotational speed of the feed screw 9 are in a proportional relationship, and are precisely controlled by feedback control. As described above, the feed screw 9 transports the raw material M with the raw material supply amount limited so that the raw material M does not fill the feed zone of the screw 5. In addition, although the setting of such a raw material supply amount was illustrated as a setting of the ratio synchronized with the rotational speed of the screw 5, the setting of the raw material supply amount is assumed to be independent from the rotational speed of the screw 5. You may make it set.

このようにして、ある種類の原料Ｍによる可塑化が適宜な原料供給量で水分やガス分の流通が良好でかつスクリュ５の後退速度が良好に実行されているとき、設定・表示部２０における特定の操作で手動的に、又は特定の成形工程の終了時等に自動的に、原料供給量の設定値が制御装置１５の記憶部１９に格納されて記憶される。そして、この記憶された原料供給量の設定値は、他の種類の原料Ｍによる成形サイクルが開始されるときに、記憶部１９から読み出され設定・表示部２０における他の種類の原料Ｍによる成形サイクルの成形条件として自動的に格納され、他の種類の原料Ｍによる成形サイクルの可塑化工程で使用される。なお、原料供給量の設定値は、可塑化工程中一定のものであってもよいし、可塑化工程中のスクリュ５の後退距離か又は可塑化工程開始からの時間経過に応じて変化するプログラム状のものであってもよい。   In this way, when the plasticization by a certain kind of raw material M is performed with an appropriate raw material supply amount, the flow of moisture and gas is good, and the retraction speed of the screw 5 is executed well, the setting / display unit 20 The set value of the raw material supply amount is stored and stored in the storage unit 19 of the control device 15 manually by a specific operation or automatically at the end of a specific molding process. The stored set value of the raw material supply amount is read from the storage unit 19 when the molding cycle using another type of raw material M is started, and is determined by the other type of raw material M in the setting / display unit 20. It is automatically stored as the molding conditions of the molding cycle, and used in the plasticizing process of the molding cycle with other types of raw materials M. Note that the set value of the raw material supply amount may be constant during the plasticizing process, or a program that changes according to the retraction distance of the screw 5 during the plasticizing process or the passage of time from the start of the plasticizing process. It may be in a shape.

こうして、他の種類の原料Ｍによる成形サイクルの開始時に、０〜１００％の広い設定範囲の中から試行錯誤を繰返して原料供給量の設定値を求める必要がなくなり、極めて容易に最適な原料供給量を設定することができる。   In this way, at the start of a molding cycle with other types of raw materials M, it is not necessary to repeat trial and error from within a wide setting range of 0 to 100%, and the setting value of the raw material supply amount does not need to be obtained. The amount can be set.

上記の他の種類の原料Ｍは、ある種類の原料Ｍと同一名称の原料であっても形状、製造ロット、メーカ等の異なる場合も含む。そして、その場合には、この発明により最適な原料供給量に略等しい設定値に自動設定されるが、僅かな設定変更が必要になるときもある。そのため、自動設定された原料供給量の設定値は、その値に加減して微調整が可能となっている。この微調整は、ある種類の原料Ｍとは明らかに種類の異なる他の原料Ｍで成形サイクルを開始するときには、さらに必要となるが、それに対応可能な調整幅を有している。ところで、制御装置１５はその記憶部１９にフィードスクリュ９の回転速度の設定値を含むスクリュ５の回転速度や射出速度等の金型毎に予め求められた成形条件群を有し、その成形条件群のデータを設定・表示部２０に呼び出してその金型の成形サイクルを実行する。そのときには、本発明の記憶された原料供給量の設定値は成形条件群のフィードスクリュ９の回転速度の設定値データで上書きされる。   The other types of raw materials M include raw materials having the same names as certain types of raw materials M, but also include cases where the shape, production lot, manufacturer, etc. are different. In that case, the present invention automatically sets the set value to be approximately equal to the optimum raw material supply amount, but a slight setting change may be required. Therefore, the set value of the automatically set raw material supply amount can be finely adjusted by adjusting the value. This fine adjustment is further necessary when a molding cycle is started with another raw material M that is clearly different from a certain type of raw material M, but has an adjustment range that can be accommodated. By the way, the control device 15 has in the storage unit 19 a group of molding conditions obtained in advance for each mold such as the rotational speed and injection speed of the screw 5 including the set value of the rotational speed of the feed screw 9, and the molding conditions. The group data is called to the setting / display unit 20 to execute the molding cycle of the mold. At that time, the stored set value of the raw material supply amount of the present invention is overwritten with the set value data of the rotational speed of the feed screw 9 of the molding condition group.

この発明は以上説明した実施例に限定されるものではなく、発明の趣旨を逸脱しない範囲内において種々の変更を付加して実施することができる。   The present invention is not limited to the embodiments described above, and various modifications can be added and implemented without departing from the spirit of the invention.

本発明の可塑化装置の原料供給量の制御方法を実施する可塑化装置の縦断面図とブロック図である。It is the longitudinal cross-sectional view and block diagram of a plasticizer which implement the control method of the raw material supply amount of the plasticizer of this invention.

符号の説明Explanation of symbols

１ 可塑化装置
２ 射出・回転駆動手段
３ エンコーダ
４ 加熱筒
５ スクリュ
６ ノズル
７ 上部開口
８ 原料落下路
９ フィードスクリュ
１０ フィードスクリュ回転駆動手段
１１ 原料供給手段
１２ 真空源
１３ シャッタ
１４ ホッパ
１５ 制御装置
１６ ＣＰＵ
１７ 出力部
１８ 入力部
１９ 記憶部
２０ 設定・表示部
２１ 筒体
Ｍ 原料 DESCRIPTION OF SYMBOLS 1 Plasticization apparatus 2 Injection | emission / rotation drive means 3 Encoder 4 Heating cylinder 5 Screw 6 Nozzle 7 Upper opening 8 Raw material dropping path 9 Feed screw 10 Feed screw rotation drive means 11 Raw material supply means 12 Vacuum source 13 Shutter 14 Hopper 15 Control device 16 CPU
17 Output unit 18 Input unit 19 Storage unit 20 Setting / display unit 21 Tubular body M Raw material

Claims (3)

減圧した加熱筒内へ原料供給手段から供給する原料を加熱筒内に設けられたスクリュを用いて可塑化する際に発生する水分やガス分を吸引し排出するように構成した可塑化装置の原料供給量の制御方法であって、
ある種類の原料による成形サイクルの可塑化工程において、前記水分やガス分を良好に流通させ、かつ前記可塑化を安定して実行するようにフィードスクリュによる原料供給量が制限されて制御されるとき、前記加熱筒内に設けられたスクリュの回転速度に対応したフィードスクリュによる原料供給量の設定値を金型毎に予め求められた成形条件群のデータとして記憶させ、他の種類の原料による成形サイクルの可塑化工程では、前記記憶された金型毎のフィードスクリュによる原料供給量の設定値に基づいて可塑化を行うことを特徴とする可塑化装置の原料供給量の制御方法。 Raw material for plasticizer configured to suck and discharge moisture and gas generated when plasticizing raw material supplied from raw material supply means into decompressed heating cylinder using screw provided in heating cylinder A method for controlling the supply amount,
In a plasticizing process of a molding cycle using a certain type of raw material, when the amount of raw material supplied by a feed screw is limited and controlled so that the water and gas components are circulated well and the plasticization is stably performed , The set value of the raw material supply amount by the feed screw corresponding to the rotation speed of the screw provided in the heating cylinder is stored as the data of the molding condition group obtained in advance for each die, and molding by other types of raw materials In the plasticizing step of the cycle, plasticizing is performed based on the stored setting value of the raw material supply amount by the feed screw for each mold, and the control method of the raw material supply amount of the plasticizer. 前記他の種類の原料の成形サイクルの可塑化工程では、フィードスクリュによる原料供給量は、前記記憶されたフィードスクリュによる原料供給量の設定値に加減して調節可能である請求項１に記載の可塑化装置の原料供給量の制御方法。 The raw material supply amount by the feed screw can be adjusted by adjusting the stored value of the raw material supply amount by the feed screw in the plasticizing step of the molding cycle of the other type of raw material. A method of controlling the raw material supply amount of the plasticizing apparatus. 記憶された前記フィードスクリュによる原料供給量の設定値は、成形条件群のデータが呼び出されたときには、成形条件群のフィードスクリュによる原料供給量の設定値に対応するデータで上書きされる請求項１又は２に記載の可塑化装置の原料供給量の制御方法。 The stored set value of the raw material supply amount by the feed screw is overwritten with data corresponding to the set value of the raw material supply amount by the feed screw of the forming condition group when the forming condition group data is called. Or the control method of the raw material supply amount of the plasticizing apparatus of 2.
JP2007231480A 2007-09-06 2007-09-06 Method for controlling raw material supply in plasticizing apparatus Expired - Fee Related JP5240815B2 (en)

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