JPH0425846B2 - - Google Patents

Info

Publication number
JPH0425846B2
JPH0425846B2 JP60177399A JP17739985A JPH0425846B2 JP H0425846 B2 JPH0425846 B2 JP H0425846B2 JP 60177399 A JP60177399 A JP 60177399A JP 17739985 A JP17739985 A JP 17739985A JP H0425846 B2 JPH0425846 B2 JP H0425846B2
Authority
JP
Japan
Prior art keywords
cylinder
control
temperature
control device
rotation speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP60177399A
Other languages
Japanese (ja)
Other versions
JPS6237122A (en
Inventor
Tsutomu Tokuda
Keizo Abe
Masami Maeda
Takayasu Asai
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP60177399A priority Critical patent/JPS6237122A/en
Publication of JPS6237122A publication Critical patent/JPS6237122A/en
Publication of JPH0425846B2 publication Critical patent/JPH0425846B2/ja
Granted legal-status Critical Current

Links

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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/834—Cooling
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • B29C2948/92085—Velocity
    • B29C2948/92095—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
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/92895—Barrel or housing
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Description

【発明の詳細な説明】 ［発明の背景と目的］ 本発明は化学発泡押出機のシリンダ温度制御装
置に係り、特に温度制御精度の向上をはかるのに
好適な化学発泡押出機のシリンダ温度制御装置に
関するものである。[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a cylinder temperature control device for a chemical foaming extruder, and particularly to a cylinder temperature control device for a chemical foaming extruder suitable for improving temperature control accuracy. It is related to.

化学発泡押出機の温度条件は、押出材料の特性
上、発泡温度範囲が極めて狭く、さらにその温度
範囲内において発泡度を安定させる温度は狭く、
一点であると言つても過言ではない。 Due to the characteristics of the extrusion material, the temperature conditions for the chemical foaming extruder are such that the foaming temperature range is extremely narrow, and within that temperature range, the temperature that stabilizes the degree of foaming is narrow.
It is no exaggeration to say that it is one point.

また、制御方式においては、発泡制御の場合、
発泡の微分的制御を押出機クロスヘツド出口の冷
却水槽の移動により、また、積分的制御をシリン
ダ出口温度（クロスヘツドに近接したシリンダゾ
ーン温度）の制御により実施している。ここにお
いて、従来からの冷却温度制御は、PID制御では
あるが、安価な冷却方法とするためフアン用モー
ターを使用しているため、PID制御での出力は、
一定周期でオン・オフの比率を変えるだけで、常
に最大風量が被加熱体に供給され、この瞬間にお
いて発泡条件が簡単にくずれ、発泡の安定性が乱
されていた。 In addition, in the control method, in the case of foaming control,
Differential control of foaming is achieved by moving a cooling water bath at the exit of the extruder crosshead, and integral control is achieved by controlling the cylinder exit temperature (cylinder zone temperature adjacent to the crosshead). Here, the conventional cooling temperature control is PID control, but since a fan motor is used to make it an inexpensive cooling method, the output under PID control is
By simply changing the on/off ratio at regular intervals, the maximum air volume was always supplied to the heated object, and at this moment the foaming conditions were easily disrupted, disrupting the stability of foaming.

また、従来より負荷を開閉する目的で使用され
ている半導体スイツチあるいは有接点スイツチの
場合、起動電流による電力の消耗や有接点スイツ
チについてはチヤタリングによる接点の摩耗が生
ずるという問題があつた。 Furthermore, in the case of semiconductor switches or contact switches that have been conventionally used for the purpose of switching on and off loads, there have been problems in that power is consumed due to starting current, and in contact switches, the contacts wear out due to chattering.

また、一般押出機で知られているように、スク
リユーと押出材料間で起こる摩擦熱による温度上
昇は、その温度制御を悪化させる要因となり、従
来技術であるスクリユー内部を熱媒を用いて冷却
して、その摩擦熱を除去する方法を、精密な温度
制御という点で併用しなければならない。一方、
熱媒（油あるいは水など）を用いてシリンダの外
部を熱媒冷却する方法も従来より使用されていた
が、この場合、熱量の量を０〜100％と可変する
ことがこれに相当するが、熱媒装置、熱媒の量を
制御するコントロールバルブ等の価格が高価であ
るという問題がある。また、水あるいは油等の熱
媒を使用するため、それのメンテナンスが容易で
ないという問題がある。 In addition, as is known in general extruders, the temperature rise due to frictional heat that occurs between the screw and the extruded material deteriorates temperature control. Therefore, a method for removing the frictional heat must be used in conjunction with precise temperature control. on the other hand,
A method of cooling the outside of the cylinder using a heat medium (such as oil or water) has also been used in the past, but in this case, the method involves varying the amount of heat from 0 to 100%. However, there is a problem in that the cost of the heating medium device, the control valve for controlling the amount of the heating medium, etc. is expensive. Further, since a heat medium such as water or oil is used, there is a problem that maintenance thereof is not easy.

本発明の目的は、上記した従来技術の欠点をな
くし、冷却側の冷却制御をフアン用モーターの回
転数アナログ制御にて精密に行うことができる化
学発泡押出機のシリンダ温度制御装置を提供する
ことにある。 An object of the present invention is to provide a cylinder temperature control device for a chemical foaming extruder, which eliminates the drawbacks of the above-mentioned conventional technology and allows precise cooling control on the cooling side by analog control of the rotation speed of a fan motor. It is in.

［発明の概要］ 本発明の特徴は、化学発泡押出機のシリンダの
スクリユー内部を一定温度の熱媒を用いて冷却す
るときに、前記シリンダの外部から冷却を行うた
めのフアン用モーターを設け、該モーター回転数
をそれの０〜100％の範囲でPID制御温度調節計
からの信号によつてPIDアナログ制御するモータ
ー回転数制御装置を具備させ、前記フアン用モー
ターの回転数を可変にして冷却制御を行うものに
於て、シリンダの出口部のシリンダゾーン以外は
前記シリンダの温度検出器からの信号のみで動作
させると共に出口部のシリンダゾーンは前記温度
検出器からの信号と、発泡制御装置からの信号と
で動作させる様構成されたことを特徴とする化学
発泡押出機のシリンダ温度制御装置にある。[Summary of the Invention] A feature of the present invention is that when the inside of the screw of the cylinder of a chemical foaming extruder is cooled using a heating medium at a constant temperature, a fan motor is provided for cooling from the outside of the cylinder, A motor rotation speed control device that performs PID analog control of the motor rotation speed in the range of 0 to 100% by a signal from a PID control temperature controller is provided, and the rotation speed of the fan motor is varied to provide cooling. In a device that performs control, the cylinder zone at the outlet of the cylinder is operated only by the signal from the temperature sensor of the cylinder, and the cylinder zone at the outlet is operated by the signal from the temperature sensor and the foaming control device. A cylinder temperature control device for a chemical foaming extruder is characterized in that it is configured to operate with a signal of:

［発明の実施例］ 以下本発明を第１図に示した実施例を用いて詳
細に説明する。[Embodiments of the Invention] The present invention will be described in detail below using an embodiment shown in FIG.

第１図は本発明の化学発泡押出機のシリンダ温
度制御装置の一実施例を示す系統図である。第１
図において、１は化学発泡押出機のシリンダ８の
各ブロツクに配置した複数台からなるフアン駆動
用モーター、２はモーター回転数制御装置、３は
PID制御温度調節計、４は温度検出器、５は発泡
制御装置で、発泡制御を長時間において安定させ
るには温度条件がかなりのウエイートをもつてお
り、特に発泡制御するシリンダ８の出口温度の安
定性が非常に重要であり、また、他のシリンダゾ
ーンも発泡安定性に影響するので、フアン駆動用
モーター１はシリンダ８の各ブロツクに配置し、
シリンダ８のクロスヘツド９側のフアン駆動用モ
ーター１用のモーター回転数制御装置２のための
PID制御温度調節計３には押出機に組み込まれた
温度検出器４と発泡制御装置５の出力とを入力
し、これらをつき合わせた信号がフイードバツク
信号となるようにしてあり、他のPID制御温度調
節計３には各温度検出器４の出力のみを入力させ
るようにして、各PID制御温度調節計３は対応す
るモーター回転数制御装置２に制御出力を送出す
るとともに、対応するヒータ電力制御装置６の出
力して、各モーター回転数制御装置２は対応する
フアン駆動用モーター１の回転数をPID制御し、
各ヒータ電力制御装置６は対応するシリンダ８を
加熱するヒータ７に流す電流をPID制御する。１
０はシリンダ８内のスクリユー、１１は熱媒循環
装置である。なお、モーター１の回転数制御には
インバータを使用してある。 FIG. 1 is a system diagram showing an embodiment of a cylinder temperature control device for a chemical foaming extruder according to the present invention. 1st
In the figure, 1 is a fan drive motor consisting of a plurality of units arranged in each block of cylinder 8 of a chemical foaming extruder, 2 is a motor rotation speed control device, and 3 is a fan drive motor.
A PID control temperature controller, 4 a temperature detector, and 5 a foaming control device.In order to stabilize foaming control over a long period of time, temperature conditions have a considerable weight, especially the temperature at the outlet of cylinder 8, which controls foaming. Since stability is very important and other cylinder zones also affect foaming stability, a fan drive motor 1 is placed in each block of cylinders 8.
For the motor rotation speed control device 2 for the fan drive motor 1 on the crosshead 9 side of the cylinder 8.
The temperature detector 4 built into the extruder and the output of the foaming control device 5 are input to the PID control temperature controller 3, and the signal obtained by comparing these signals becomes a feedback signal, which is used to control other PID control devices. Only the output of each temperature detector 4 is input to the temperature controller 3, and each PID control temperature controller 3 sends a control output to the corresponding motor rotation speed control device 2, and also controls the power of the corresponding heater. Based on the output from the device 6, each motor rotation speed control device 2 performs PID control on the rotation speed of the corresponding fan drive motor 1,
Each heater power control device 6 performs PID control on the current flowing through the heater 7 that heats the corresponding cylinder 8. 1
0 is a screw in the cylinder 8, and 11 is a heat medium circulation device. Note that an inverter is used to control the rotation speed of the motor 1.

上記したように、本発明の実施例においては、
回転数を０〜100％の範囲でPIDアナログ制御さ
れるフアン駆動用モーター１を用いてシリンダ８
の外部を冷却するようにしたので、温度制御精度
を向上することができる。また、過渡的（インパ
ルス的）風量をシリンダ８に与えないため、急激
な温度変化をきらう被加熱体に対して好都合であ
る。 As mentioned above, in the embodiments of the present invention,
The cylinder 8 is driven using the fan drive motor 1 whose rotation speed is controlled by PID analog in the range of 0 to 100%.
Since the outside of the device is cooled, temperature control accuracy can be improved. Further, since no transient (impulse) air volume is applied to the cylinder 8, this is advantageous for heated objects that dislike sudden temperature changes.

なお、シリンダ８の外部の冷却を熱媒冷却する
ものがあるが、この場合、現在使用されている電
磁弁のかわりに流量を遠隔調整できる流量制御弁
を用いると、本発明に係るフアンと同様な制御を
行うことができるが、高価なものになるという欠
点を生ずる。 Note that there is a system that uses heat medium to cool the outside of the cylinder 8, but in this case, if a flow rate control valve that can remotely adjust the flow rate is used instead of the currently used solenoid valve, it will be possible to cool the outside of the cylinder 8 similarly to the fan according to the present invention. However, it has the disadvantage of being expensive.

上記した実施例では、フアン駆動用モーター１
の回転数制御を行うようにしたが、風量調整用ダ
ンパを設けて、このダンパの開閉度をPIDアナロ
グ制御するようにしても同様の効果を得ることが
できる。 In the above embodiment, the fan drive motor 1
However, the same effect can be obtained by providing a damper for adjusting the air volume and controlling the degree of opening/closing of this damper by PID analog control.

［発明の効果］ 以上説明したように、本発明によれば、冷却側
の冷却制御をフアン用モーターの回転数アナログ
制御にて行うようにしたので、温度制御精度を向
上できるという効果がある。[Effects of the Invention] As described above, according to the present invention, since the cooling control on the cooling side is performed by analog control of the rotation speed of the fan motor, there is an effect that temperature control accuracy can be improved.

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

第１図は本発明の化学発泡押出機のシリンダ温
度制御装置の一実施例を示す系統図である。 １：フアン駆動用モーター、２：モーター回転
数制御装置、３：PID制御温度調節計、４：温度
検出器、５：発泡制御装置、６：ヒータ電力制御
装置、７：ヒータ、８：シリンダ、９：クロスヘ
ツド、１０：スクリユー、１１：熱媒循環装置。 FIG. 1 is a system diagram showing an embodiment of a cylinder temperature control device for a chemical foaming extruder according to the present invention. 1: Fan drive motor, 2: Motor rotation speed control device, 3: PID control temperature controller, 4: Temperature detector, 5: Foaming control device, 6: Heater power control device, 7: Heater, 8: Cylinder, 9: Crosshead, 10: Screw, 11: Heat medium circulation device.

Claims (1)

【特許請求の範囲】[Claims] １ 化学発泡押出機のシリンダのスクリユー内部
を一定温度の熱媒を用いて冷却するときに、前記
シリンダの外部から冷却を行うためのフアン用モ
ーターを設け、該モーター回転数をそれの０〜
100％の範囲でPID制御温度調節計からの信号に
よつてPIDアナログ制御するモーター回転数制御
装置を具備させ、前記フアン用モーターの回転数
を可変にして冷却制御を行うものに於て、シリン
ダの出口部のシリンダゾーン以外は前記シリンダ
の温度検出器からの信号のみで動作させると共に
出口部のシリンダゾーンは前記温度検出器からの
信号と、発泡制御装置からの信号とで動作させる
様構成されたことを特徴とする化学発泡押出機の
シリンダ温度制御装置。1. When cooling the inside of the screw in the cylinder of a chemical foaming extruder using a heating medium at a constant temperature, a fan motor is provided to perform cooling from the outside of the cylinder, and the rotation speed of the motor is adjusted from 0 to 0.
In a device that is equipped with a motor rotation speed control device that performs PID analog control using a signal from a PID control temperature controller within a range of 100%, and performs cooling control by varying the rotation speed of the fan motor, the cylinder The cylinder zone other than the outlet section is operated only by the signal from the temperature sensor of the cylinder, and the outlet section cylinder zone is operated by the signal from the temperature sensor and the signal from the foaming control device. A cylinder temperature control device for a chemical foaming extruder, which is characterized by:
JP60177399A 1985-08-12 1985-08-12 Controller of cylinder temperature of chemical foam extruding machine Granted JPS6237122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60177399A JPS6237122A (en) 1985-08-12 1985-08-12 Controller of cylinder temperature of chemical foam extruding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60177399A JPS6237122A (en) 1985-08-12 1985-08-12 Controller of cylinder temperature of chemical foam extruding machine

Publications (2)

Publication Number Publication Date
JPS6237122A JPS6237122A (en) 1987-02-18
JPH0425846B2 true JPH0425846B2 (en) 1992-05-01

Family

ID=16030245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60177399A Granted JPS6237122A (en) 1985-08-12 1985-08-12 Controller of cylinder temperature of chemical foam extruding machine

Country Status (1)

Country Link
JP (1) JPS6237122A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0698670B2 (en) * 1987-05-12 1994-12-07 東芝機械株式会社 Extruder temperature control method
JP2677140B2 (en) * 1992-10-21 1997-11-17 日本プラスト株式会社 Insert mold
JP6125480B2 (en) * 2014-10-27 2017-05-10 日精樹脂工業株式会社 Temperature control device for injection molding machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250363A (en) * 1975-10-17 1977-04-22 Crompton & Knowles Corp Extruder
JPS58108119A (en) * 1981-11-30 1983-06-28 Fujikura Ltd Controlling method for temperature of resin in plastic molding machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250363A (en) * 1975-10-17 1977-04-22 Crompton & Knowles Corp Extruder
JPS58108119A (en) * 1981-11-30 1983-06-28 Fujikura Ltd Controlling method for temperature of resin in plastic molding machine

Also Published As

Publication number Publication date
JPS6237122A (en) 1987-02-18

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