JPH026118A - Method and device for controlling resin pressure of extrusion molding equipment - Google Patents
Method and device for controlling resin pressure of extrusion molding equipmentInfo
- Publication number
- JPH026118A JPH026118A JP63156672A JP15667288A JPH026118A JP H026118 A JPH026118 A JP H026118A JP 63156672 A JP63156672 A JP 63156672A JP 15667288 A JP15667288 A JP 15667288A JP H026118 A JPH026118 A JP H026118A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- extruder
- resin pressure
- material supply
- supply 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.)
- Pending
Links
- 239000011347 resin Substances 0.000 title claims abstract description 46
- 229920005989 resin Polymers 0.000 title claims abstract description 46
- 238000001125 extrusion Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 5
- 239000002994 raw material Substances 0.000 claims abstract description 60
- 230000007423 decrease Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000003190 augmentative effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 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
- 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
- B29C2948/92009—Measured parameter
- B29C2948/92047—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
- B29C2948/92323—Location or phase of measurement
- B29C2948/92457—Drive section, e.g. gearbox, motor or drive fluids
-
- 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
- B29C2948/92466—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
-
- 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
- B29C2948/92514—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
- B29C2948/92504—Controlled parameter
- B29C2948/92533—Torque
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、押出成形装置の樹脂圧力制御方法及び装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a resin pressure control method and apparatus for an extrusion molding apparatus.
（ロ）従来の技術
従来の押出成形装置の樹脂圧力制御装置として、例えば
雑誌「油圧技術」昭和４７年１１月号の第８９頁に示さ
れるものがある。これに示される押出成形装置は、押出
機、ギアポンプ及びダイを有しており、押出機によって
溶融した樹脂をギアポンプによって′ダイから押出すよ
うに構成されている。ギアポンプは一定速度で運転され
、一方押出機はこれとギアポンプとの間の樹脂圧力が設
定値どおりとなるように、ＰＩＤフィードバック制御が
行われる。これにより、押出し条件を安定させることを
意図している。押出機に供給する原料を原料供給装置を
用いて供給する場合には、原料供給装置もフィードバッ
ク信号に比例した状態で制御される。(B) Prior art As a conventional resin pressure control device for an extrusion molding apparatus, there is one shown, for example, on page 89 of the November issue of the magazine "Hydraulic Technology", 1972. The extrusion molding apparatus shown therein includes an extruder, a gear pump, and a die, and is configured so that the resin melted by the extruder is extruded from the die by the gear pump. The gear pump is operated at a constant speed, while the extruder is subjected to PID feedback control so that the resin pressure between it and the gear pump remains at a set value. This is intended to stabilize extrusion conditions. When the raw material to be supplied to the extruder is supplied using a raw material supply device, the raw material supply device is also controlled in a state proportional to the feedback signal.
（ハ）発明が解決しようとする課題
しかしながら、上記のような従来の押出成形装置の樹脂
圧力制御装置には、原料供給装置によって供給する原料
を押出機の運転状態に応じて制御することが困難である
という問題点がある。すなわち、押出機用主電動機の回
転速度と、原料供給装置からの原料供給量とは一定の比
率に制御されるが１両者を所定の状態でバランスさせる
ことは非常に困難であり、押出機のシリンダの充満率（
すなわち、シリンダ内の樹脂の量÷シリンダの容積）は
一定とならない。原料供給量が少しでも不足すると、充
満率は時間の経過と共に次第に減少する。また、逆に原
料供給量が少しでも多ければ、充満率が増大していく。(c) Problems to be Solved by the Invention However, in the conventional resin pressure control device of the extrusion molding device as described above, it is difficult to control the raw material supplied by the raw material supply device according to the operating state of the extruder. There is a problem that. In other words, the rotational speed of the main electric motor for the extruder and the amount of raw material supplied from the raw material supply device are controlled at a fixed ratio, but it is extremely difficult to balance the two in a predetermined state. Cylinder filling rate (
That is, the amount of resin in the cylinder divided by the volume of the cylinder is not constant. If there is even a slight shortage in the amount of raw material supplied, the filling rate will gradually decrease over time. Conversely, if the amount of raw material supplied is even slightly larger, the filling rate will increase.
このように押出機のシリンダの充満率が変動すると、押
出機とギアポンプとの間の樹脂圧力が変動することにな
る。このようにギアポンプ直前の樹脂圧力が変動すると
押出条件が安定せず、フィルム、シートなどの製品の均
一性を保持することが困難となる。なお、原料供給量が
多すぎる場合にはベントアップが発生ずるという問題も
ある。本発明はこのような課題を解決することを目的と
している。If the filling rate of the extruder cylinder fluctuates in this way, the resin pressure between the extruder and the gear pump will fluctuate. When the resin pressure immediately before the gear pump fluctuates in this way, the extrusion conditions become unstable, making it difficult to maintain the uniformity of products such as films and sheets. Note that there is also the problem that vent-up occurs when the amount of raw material supplied is too large. The present invention aims to solve these problems.
（ニ）課題を解決するための手段
本発明は、押出機用主電動機の駆動電流に基づいて原料
供給装置を制御することにより上記課題を解決する。す
なわち、本発明による押出成形装置の樹脂圧力制御方法
は、押出機用主電動機の駆動電流を検出し、駆動電流が
増大した場合に原料供給装置を供給原料減少側に作動さ
せ、駆動電流が減少した場合に原料供給装置を供給原料
増大側に作動させることを要旨としている。(d) Means for Solving the Problems The present invention solves the above problems by controlling the raw material supply device based on the drive current of the main motor for an extruder. That is, the resin pressure control method for an extrusion molding apparatus according to the present invention detects the drive current of the main motor for the extruder, and when the drive current increases, operates the raw material supply device to decrease the supply material, thereby reducing the drive current. The main idea is to operate the raw material supply device to increase the amount of raw material to be supplied when this occurs.
また、本発明による押出成形装置の樹脂圧力制御装置は
、押出機とギアポンプとの間の樹脂圧力を検出する樹脂
圧力検出器と、所望の樹脂圧力を設定する設定器と、樹
脂圧力検出器によって検出される実際の樹脂圧力と設定
器によって設定された設定値とを比較する比較器と、比
較器からの信号に基づいてフィードバック制御信号を出
力するフィードバック演算器と、フィードバック演算器
からのフィードバック信号に基づいて押出機用主電動機
の駆動電流を制御する主電動機制御装置と、主電動機に
供給される電流を検出する電流検出器と、電流検出器に
よって検出された電流信号及びフィードバック演算器か
らのフィードバック信号に基づいて原料供給装置の原料
供給量を制御する（、Ｓ号を出力する原料供給装置制御
装置と、を有している。Further, the resin pressure control device for an extrusion molding apparatus according to the present invention includes a resin pressure detector that detects the resin pressure between the extruder and the gear pump, a setting device that sets a desired resin pressure, and a resin pressure detector. A comparator that compares the actual resin pressure detected with the setting value set by the setting device, a feedback calculator that outputs a feedback control signal based on the signal from the comparator, and a feedback signal from the feedback calculator. a traction motor control device that controls the drive current of the traction motor for an extruder based on the traction motor; a current detector that detects the current supplied to the traction motor; and a current signal detected by the current detector and a feedback calculator. It has a raw material supply device control device that controls the raw material supply amount of the raw material supply device based on the feedback signal (and outputs a signal S).
原料供給装置制御装置は、フィードバック信号に第１の
定数を乗じたものから電流信号に第２の定数を乗じたも
のを減じた値に比例して供給原料が変動するように原料
供給装置の作動を制御する信号を出力するように構成す
ることができる。The raw material supply device control device operates the raw material supply device so that the feed material varies in proportion to the feedback signal multiplied by the first constant minus the current signal multiplied by the second constant. It can be configured to output a signal for controlling.
（ホ）作用
原料供給装置から供給される原料は押出機によって溶融
され、ギアポンプに送られ、ダイを通して押出される。(E) The raw material supplied from the working raw material supply device is melted by the extruder, sent to the gear pump, and extruded through the die.
押出機とギアポンプとの間の樹脂圧力が検出され、これ
が設定値となるように押出機用主電動機の駆動電流がお
制御される。押出機用主電動機の駆動電流が電流検出器
にょフて検出され、この電流信号に基づいて原料供給装
置か制御される。主電動機の駆動電流は、押出機の負荷
トルク、すなわち押出機シリンダの充満率、に対応して
いる。従って、駆動電流が増大するということは充満率
が増大していることを示しており、この場合には、原料
供給装置から押出機に供給する原料を減少させる。逆に
駆動電流が減少した場合には、供給原料を増大させる。The resin pressure between the extruder and the gear pump is detected, and the drive current of the main motor for the extruder is controlled so that this becomes the set value. The drive current of the main motor for the extruder is detected by a current detector, and the raw material supply device is controlled based on this current signal. The drive current of the main motor corresponds to the load torque of the extruder, ie the filling rate of the extruder cylinder. Therefore, an increase in the drive current indicates an increase in the filling rate, in which case the feedstock fed from the feedstock feeder to the extruder is reduced. Conversely, if the drive current decreases, the feedstock is increased.
これによりシリンダの充満率が一定に保持され、押出機
とギアポンプとの間の樹脂圧力か安定する。従って、押
出条件が安定し、均一な製品を押出すことが可能となる
。This keeps the cylinder filling rate constant and stabilizes the resin pressure between the extruder and gear pump. Therefore, the extrusion conditions are stabilized, and it becomes possible to extrude a uniform product.
（へ）実施例
押出機１０のシリンダ１１の先端側にギアポンプ１２が
連結されており、ギアポンプ１２の吐出側にダイ１４が
接続されている。押出機１０のスクリュー１６は押出機
用主電動機１８によって駆動される。押出機用主電動機
１８の駆動電流は主電動機制御装置２０によって制御さ
れる。押出機１０のホッパー２２には原料供給装置２４
から原料か供給可能である。原料供給装置２４によって
供給される樹脂原料の量は原料供給装置制御装置２６か
らの指令によって制御される。押出機１０とギアポンプ
１２との間にこの部分の樹脂圧力を検出可能な樹脂圧力
検出器２８が設けられている。樹脂圧力検出器２８の検
出値は比較器３０に人力される。比較器３０には設定器
３２からの設定値も人力される。比較器３０の出力はフ
ィードバック演算器３４に人力される。フィードバック
演算器３４からのフィードバック信号は主電動機制御装
置２０に人力される。また、フィードバック信号に乗算
器３６によって所定の乗数に、を乗じたものが比較器３
８に人力される。押出機用上１に動機１８にはこれの駆
動電流を検出可能な電流検出器４０が設けられており、
これによって検出された電流信号に乗算器４２において
所定の乗数に２を乗じたものが比較器３８に人力される
。比較器３８の出力信号は原料供給装置制御装置２６に
人力される。(f) Example A gear pump 12 is connected to the distal end side of the cylinder 11 of the extruder 10, and a die 14 is connected to the discharge side of the gear pump 12. The screw 16 of the extruder 10 is driven by a main motor 18 for the extruder. The drive current of the extruder main motor 18 is controlled by a main motor control device 20. A raw material supply device 24 is provided in the hopper 22 of the extruder 10.
Raw materials can be supplied from The amount of resin raw material supplied by the raw material supply device 24 is controlled by a command from a raw material supply device control device 26. A resin pressure detector 28 is provided between the extruder 10 and the gear pump 12 to detect the resin pressure in this area. The detected value of the resin pressure detector 28 is input manually to a comparator 30. The set value from the setter 32 is also manually input to the comparator 30 . The output of the comparator 30 is input to a feedback calculator 34 . A feedback signal from the feedback calculator 34 is manually input to the main motor control device 20 . Also, the comparator 3 receives the feedback signal multiplied by a predetermined multiplier by the multiplier 36.
8 will be man-powered. A current detector 40 capable of detecting the driving current of the extruder 1 is provided on the extruder upper 1 mower 18.
The current signal thus detected is multiplied by a predetermined multiplier of 2 in the multiplier 42 and the resultant signal is input to the comparator 38 . The output signal of the comparator 38 is inputted to the raw material supply device control device 26 .
次にこの実施例の作用について説明する。Ｉｆｆ料供給
装置２４から押出機１０に供給される樹脂原料はシリン
ダ１１内で溶融され、ギアポンプ１２に送り出される。Next, the operation of this embodiment will be explained. The resin raw material supplied from the if material supply device 24 to the extruder 10 is melted within the cylinder 11 and sent to the gear pump 12.
次いで、一定速度で回転するギアポンプ１２によってダ
イ１４に送られ、これから押出される。押出機１０とギ
アポンプ１２との間の樹脂圧力が樹脂圧力検出器２８に
よって検出されており、この検出値ｑが比較３３０に人
力され、設定器３２によりて設定された設定値ｒとの１
扁差ｑ−ｒが演算され、これがフィードバック演算器３
４に人力される。フィードバック演算器３４は偏差ｑ−
ｒに基づいてＰＩＤ演口全行ない、こうして得られるフ
ィードバック信号Ｙを主電動機制御装置２０及び乗算器
３６に人力する。It is then sent to a die 14 by a gear pump 12 rotating at a constant speed, from which it is extruded. The resin pressure between the extruder 10 and the gear pump 12 is detected by the resin pressure detector 28, and this detected value q is input manually to the comparison 330, and is compared to the set value r set by the setting device 32.
The flatness difference qr is calculated, and this is fed back to the feedback calculator 3.
4 will be done manually. The feedback calculator 34 calculates the deviation q-
The entire PID operation is performed based on r, and the feedback signal Y obtained in this way is manually input to the main motor control device 20 and the multiplier 36.
主電動機制御装置２０はこのフィードバック信号Ｙに基
づいて押出機用主電動機１８の駆動電流Ｉを制御する。The main motor control device 20 controls the drive current I of the extruder main motor 18 based on this feedback signal Y.
これにより樹脂圧力検出器２８によって検出される検出
値ｑが設定値ｒに常に一致するようにスクリュー１６の
回転速度が制御される。スクリュー１６の回転速度の変
化に応じて原料供給装置２４からシリンダ１１へ供給す
る樹脂原料の量も変化させなければならない。比較器３
８は、フィードバック信号Ｙに乗数に１を乗じたものか
ら駆動電流■に乗数に２を乗じたものを減じたに１ ・
Ｙ−に２ ・Ｉを原料供給装置制御装置２６に人力する
。これに基づいて原料供給装置制御装置２６は原料供給
装置２４に信号を出力する。これにより、シリンダ１１
内の樹脂の充満率か増加して押出機用主電動機１８の負
荷トルクが大きくなった場合には、駆動電流Ｉが増大す
るため原料供給装置２４からシリンダ１１に供給される
原料供給量が減少する。逆に押出機用主電動機１８の負
荷トルクが小さくなった場合には、原料供給装置２４か
らシリンダ１１へ供給される原料供給量が増大する。こ
れによりシリンダ１１の樹脂充満率は常に一定に保持さ
れる。シリンダ１１の樹脂充満率が一定に保持されると
、ギアポンプ１２に送られる樹脂圧力も安定する。従っ
て、ダイ１４における押出条件が安定し、製品の均一性
が確保され、またベントアップの発生も防ｃｈされる。As a result, the rotational speed of the screw 16 is controlled so that the detected value q detected by the resin pressure detector 28 always matches the set value r. The amount of resin raw material supplied from the raw material supply device 24 to the cylinder 11 must also be changed in accordance with changes in the rotational speed of the screw 16. Comparator 3
8 is the feedback signal Y multiplied by the multiplier by 1 minus the drive current ■ multiplied by the multiplier by 2, which is 1.
Manually input 2 and I to the raw material supply device control device 26 to Y-. Based on this, the raw material supply device control device 26 outputs a signal to the raw material supply device 24. As a result, the cylinder 11
When the load torque of the extruder main motor 18 increases due to an increase in the filling rate of the resin in the cylinder, the drive current I increases and the amount of raw material supplied from the raw material supply device 24 to the cylinder 11 decreases. do. Conversely, when the load torque of the extruder main motor 18 becomes smaller, the amount of raw material supplied from the raw material supply device 24 to the cylinder 11 increases. Thereby, the resin filling rate of the cylinder 11 is always kept constant. When the resin filling rate of the cylinder 11 is maintained constant, the resin pressure sent to the gear pump 12 is also stabilized. Therefore, the extrusion conditions in the die 14 are stabilized, the uniformity of the product is ensured, and the occurrence of vent-up is also prevented.
（ト）発明の効果
以北説明してきたように、本発明によると、押出機用主
電動機の駆動電流を検□出し、これに基づいて原料供給
量を調節するようにしたので、押出機シリンダの充満率
が一定に保持され、ギアポンプ人口側の樹脂圧力が安定
する。これにより押出条件が安定し、均一な製品を得る
ことができ、またベントアップの発生を防止することが
できる。(G) Effects of the Invention As explained above, according to the present invention, the drive current of the main motor for the extruder is detected and the raw material supply amount is adjusted based on this, so that the extruder cylinder The filling rate is kept constant, and the resin pressure on the gear pump side is stabilized. This stabilizes the extrusion conditions, makes it possible to obtain a uniform product, and prevents vent-up.
第１図は本発明の実施例を示す図である。
１０・ ・押出機、１２・・・ギアポンプ、１４・・・
ダイ、１８・・・押出機用主電動機、２０・・・主電動
機制御装置、２４・・・原料供給装置、２６・・・原料
供給装置ルＪ御装置、２８・・・樹脂圧力検出器、３０
・・・比較器、３２・・・設定器、３４・・・フィード
バック演算器、３８・ ・比較器、４０・ ・電流検出
器。FIG. 1 is a diagram showing an embodiment of the present invention. 10... Extruder, 12... Gear pump, 14...
Die, 18... Main motor for extruder, 20... Main motor control device, 24... Raw material supply device, 26... Raw material supply device control device, 28... Resin pressure detector, 30
... Comparator, 32... Setting device, 34... Feedback calculator, 38... Comparator, 40... Current detector.
Claims (1)
る押出機と、押出機の押出側に連結されるギアポンプと
、ギアポンプの吐出側に設けられるダイと、を有する押
出成形装置の樹脂圧力制御方法において、 押出機用主電動機の駆動電流を検出し、駆動電流が増大
した場合に原料供給装置を供給原料減少側に作動させ、
駆動電流が減少した場合に原料供給装置を供給原料増大
側に作動させることを特徴とする押出成形装置の樹脂圧
力制御方法。 ２、原料供給装置と、原料供給装置から原料が供給され
る押出機と、押出機の押出側に連結されるギアポンプと
、ギアポンプの吐出側に設けられるダイと、を有する押
出成形装置の樹脂圧力制御装置において、 押出機とギアポンプとの間の樹脂圧力を検出する樹脂圧
力検出器と、所望の樹脂圧力を設定する設定器と、樹脂
圧力検出器によって検出される実際の樹脂圧力と設定器
によって設定された設定値とを比較する比較器と、比較
器からの信号に基づいてフィードバック制御信号を出力
するフィードバック演算器と、フィードバック演算器か
らのフィードバック信号に基づいて押出機用主電動機の
駆動電流を制御する主電動機制御装置と、主電動機に供
給される駆動電流を検出する電流検出器と、電流検出器
によって検出された電流信号及びフィードバック演算器
からのフィードバック信号に基づいて原料供給装置の原
料供給量を制御する信号を出力する原料供給装置制御装
置と、を有することを特徴とする押出成形装置の樹脂圧
力制御装置。 ３、原料供給装置制御装置は、フィードバック信号に第
１の定数を乗じたものから電流信号に第２の定数を乗じ
たものを減じた値に比例して供給原料が変動するように
原料供給装置の作動を制御する信号を出力する請求項２
記載の押出成形装置の樹脂圧力制御装置。[Claims] 1. Comprising a raw material supply device, an extruder to which raw materials are supplied from the raw material supply device, a gear pump connected to the extrusion side of the extruder, and a die provided on the discharge side of the gear pump. In a resin pressure control method for an extrusion molding device, the drive current of the main motor for the extruder is detected, and when the drive current increases, the raw material supply device is operated to decrease the feed material,
A resin pressure control method for an extrusion molding apparatus, characterized in that a raw material supply device is operated to increase the amount of raw material to be supplied when a drive current decreases. 2. Resin pressure in an extrusion molding device that includes a raw material supply device, an extruder to which raw materials are supplied from the raw material supply device, a gear pump connected to the extrusion side of the extruder, and a die provided on the discharge side of the gear pump. In the control device, there is a resin pressure detector that detects the resin pressure between the extruder and the gear pump, a setter that sets the desired resin pressure, and an actual resin pressure detected by the resin pressure detector and the setter. A comparator that compares the set value with a set value, a feedback calculator that outputs a feedback control signal based on the signal from the comparator, and a drive current of the main motor for the extruder based on the feedback signal from the feedback calculator. a traction motor control device that controls the traction motor; a current detector that detects the drive current supplied to the traction motor; and a current detector that detects the drive current supplied to the traction motor. 1. A resin pressure control device for an extrusion molding device, comprising: a raw material supply device control device that outputs a signal for controlling a supply amount. 3. The raw material supply device control device controls the raw material supply device so that the raw material to be supplied varies in proportion to the value obtained by subtracting the current signal multiplied by the second constant from the feedback signal multiplied by the first constant. Claim 2: outputting a signal for controlling the operation of the
A resin pressure control device for the extrusion molding apparatus described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63156672A JPH026118A (en) | 1988-06-27 | 1988-06-27 | Method and device for controlling resin pressure of extrusion molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63156672A JPH026118A (en) | 1988-06-27 | 1988-06-27 | Method and device for controlling resin pressure of extrusion molding equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH026118A true JPH026118A (en) | 1990-01-10 |
Family
ID=15632786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63156672A Pending JPH026118A (en) | 1988-06-27 | 1988-06-27 | Method and device for controlling resin pressure of extrusion molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026118A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02269024A (en) * | 1989-04-11 | 1990-11-02 | Toyoda Gosei Co Ltd | Apparatus for control of emission amount of extruder with gear pump |
| US5272104A (en) * | 1993-03-11 | 1993-12-21 | Harris Corporation | Bonded wafer process incorporating diamond insulator |
| JPH0671640A (en) * | 1992-08-27 | 1994-03-15 | Japan Steel Works Ltd:The | Kneading extrusion method |
| JP2006327174A (en) * | 2005-04-28 | 2006-12-07 | Nitto Denko Corp | Method of controlling output from extrusion molding device and sheet-like material fabricated using this |
| DE102017104520A1 (en) | 2016-03-04 | 2017-09-14 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Control method of a gear pump |
| CN112537008A (en) * | 2020-11-11 | 2021-03-23 | 浙江工业职业技术学院 | Multi-end feeding type extrusion device |
| KR20220036352A (en) | 2020-09-15 | 2022-03-22 | 스미또모 가가꾸 가부시키가이샤 | Method for producing acrylic resin film and apparatus for producing acrylic resin film |
| CN114851518A (en) * | 2022-03-21 | 2022-08-05 | 广东三优聚合物装备有限公司 | Intelligent operating system for extruder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164124A (en) * | 1983-03-08 | 1984-09-17 | Kobe Steel Ltd | Continuous kneading and extruding device with gear pump |
-
1988
- 1988-06-27 JP JP63156672A patent/JPH026118A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164124A (en) * | 1983-03-08 | 1984-09-17 | Kobe Steel Ltd | Continuous kneading and extruding device with gear pump |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02269024A (en) * | 1989-04-11 | 1990-11-02 | Toyoda Gosei Co Ltd | Apparatus for control of emission amount of extruder with gear pump |
| JPH0671640A (en) * | 1992-08-27 | 1994-03-15 | Japan Steel Works Ltd:The | Kneading extrusion method |
| US5272104A (en) * | 1993-03-11 | 1993-12-21 | Harris Corporation | Bonded wafer process incorporating diamond insulator |
| JP2006327174A (en) * | 2005-04-28 | 2006-12-07 | Nitto Denko Corp | Method of controlling output from extrusion molding device and sheet-like material fabricated using this |
| JP4553825B2 (en) * | 2005-04-28 | 2010-09-29 | 日東電工株式会社 | Extrusion molding apparatus discharge amount control method and sheet-like material molded using the same |
| DE102017104520A1 (en) | 2016-03-04 | 2017-09-14 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Control method of a gear pump |
| KR20220036352A (en) | 2020-09-15 | 2022-03-22 | 스미또모 가가꾸 가부시키가이샤 | Method for producing acrylic resin film and apparatus for producing acrylic resin film |
| CN112537008A (en) * | 2020-11-11 | 2021-03-23 | 浙江工业职业技术学院 | Multi-end feeding type extrusion device |
| CN114851518A (en) * | 2022-03-21 | 2022-08-05 | 广东三优聚合物装备有限公司 | Intelligent operating system for extruder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2636504B1 (en) | Kneading/extruding equipment and control method thereof | |
| US4550002A (en) | Method and apparatus for achieving optimum discharge from a twin-screw extrusion device | |
| JP2559110B2 (en) | Control system and method for continuous dough mixer with moving surface discharge device | |
| US9126360B2 (en) | Methods of operating an extrusion apparatus | |
| JPS5947980B2 (en) | Thermoplastic resin extrusion method | |
| JPH026118A (en) | Method and device for controlling resin pressure of extrusion molding equipment | |
| DE3917523C2 (en) | ||
| JP2589251B2 (en) | Kneading extrusion method | |
| EP2371519B1 (en) | Startup control method and startup control device of resin extruder | |
| JP4365732B2 (en) | Rubber sheet forming device | |
| JPH04125123A (en) | Operation control method for resin extrusion molding device and its device | |
| DE3833776C2 (en) | Device for extruding a thermoplastic melt | |
| JP3889941B2 (en) | Operation control apparatus and operation control method for extrusion molding apparatus | |
| US5454520A (en) | Method for controlling the material feed to a roller press for grinding particulate material | |
| JPH01314134A (en) | Stock-feeding control method in vent extruder | |
| JP2001030338A (en) | Extrusion molding equipment | |
| JP2002178392A (en) | Controlling apparatus and method for controlling | |
| JPH09155953A (en) | Method for controlling operation of extrusion molding machine | |
| JP4294844B2 (en) | Raw material supply method | |
| JP2681090B2 (en) | Speed control method of gear pump in extrusion molding apparatus | |
| JPH05245908A (en) | Extruding quantity control method of extruder with gear pump and its apparatus | |
| JPS595044A (en) | Method and apparatus for controlling tandem extruder | |
| JP2909501B2 (en) | Rubber Extrusion Cutting Unit | |
| JP2000127225A (en) | Method and apparatus for controlling operation of twin- screw extruder | |
| JPS58119808A (en) | Apparatus for controlling pressure of continuous kneading and extruding apparatus |