JPS6235824A - Temperature controlling of injection molder - Google Patents
Temperature controlling of injection molderInfo
- Publication number
- JPS6235824A JPS6235824A JP17533085A JP17533085A JPS6235824A JP S6235824 A JPS6235824 A JP S6235824A JP 17533085 A JP17533085 A JP 17533085A JP 17533085 A JP17533085 A JP 17533085A JP S6235824 A JPS6235824 A JP S6235824A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- abnormality
- normal
- setters
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は射出成形機、特に合成樹脂材料を収容する射出
シリンダにおける温度制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding machine, and more particularly to a method of controlling temperature in an injection cylinder containing a synthetic resin material.
(従来の技術)
射出成形機、例えばインラインスクリュ式射出成形機は
射出シリンダを備え、当該射出シリンダにスクリュを内
挿している。また、射出シリンダにはヒータを備え、射
出シリンダを所定の温度に加熱制御している。これによ
り、射出シリンダ内においてはスクリュの回転作用によ
って合成樹脂成形材料(以下、単に材料と記す)を前方
へ混線移送し、計量を行うとともに、射出シリンダの加
熱作用と併せて材料を熔融せしめる。(Prior Art) An injection molding machine, for example, an in-line screw type injection molding machine, includes an injection cylinder, and a screw is inserted into the injection cylinder. Further, the injection cylinder is equipped with a heater, and the injection cylinder is heated and controlled to a predetermined temperature. As a result, the synthetic resin molding material (hereinafter simply referred to as "material") is transferred forward in the injection cylinder by the rotational action of the screw, and is weighed, and the material is melted together with the heating action of the injection cylinder.
このような射出シリンダの温度は材料が変質せず、また
材料の種類に応じた最適な温度に設定している。The temperature of such an injection cylinder is set at an optimum temperature that does not cause deterioration of the material and is appropriate for the type of material.
ところで、成形中に異常が発生した場合、従来は成形サ
イクルを中断し、マニュアル作業で回復を行っている。By the way, when an abnormality occurs during molding, conventionally the molding cycle is interrupted and recovery is performed manually.
この場合各工程中の異常はセンサ等により自動検知し、
射出成形機の運転を停止する。一方、上記射出シリンダ
も当該運転の停止と同時にヒータ回路等をOFF L、
必要以上に材料を加熱しないようにするか、或いはその
まま加熱を続行し、異常回復後は直ちに使用できるよう
にするか、のいずれかの策が採られている。In this case, abnormalities during each process are automatically detected using sensors, etc.
Stop operation of the injection molding machine. On the other hand, the injection cylinder also turns off the heater circuit, etc. at the same time as the operation stops.
Measures are taken to either prevent the material from being heated more than necessary, or to continue heating the material so that it can be used immediately after the abnormality has been recovered.
(発明が解決しようとする問題点)
しかし、上述した従来における射出シリンダの・温度制
御方法は次の問題点がある。(Problems to be Solved by the Invention) However, the conventional injection cylinder temperature control method described above has the following problems.
つまり、異常が発生し、その修復に長時間を要する場合
にはヒータ回路等を0FFL、射出シリンダの加熱を中
断するが、この場合には時間が長くなるほど射出シリン
ダの温度が下がってしまう。That is, if an abnormality occurs and it takes a long time to repair, the heater circuit etc. are turned to 0FFL and heating of the injection cylinder is interrupted, but in this case, the longer the time, the lower the temperature of the injection cylinder becomes.
このため修復が完了し、射出成形機の運転を再開しても
射出シリンダが正規の温度に復帰するまで時間がかかり
、この時間ロスが作業能率を大きく低下させてしまう。Therefore, even after the repair is completed and the operation of the injection molding machine is restarted, it takes time for the injection cylinder to return to its normal temperature, and this time loss greatly reduces work efficiency.
他方、異常が発生しても、射出シリンダの加熱を続行す
れば上記弊害は解消できるが、反面材料の変質を進行さ
せてしまう。即ち、前述したように射出シリンダの温度
は材料が変質しないように最適の温度を設定しであるが
、たとえこのような許容温度内であっても少なからず変
質を生じ、これは射出シリンダ内での滞留時間が長くな
るほど進行してしまい、最後には材料の分解を起こすこ
ともある。On the other hand, even if an abnormality occurs, if the heating of the injection cylinder is continued, the above-mentioned disadvantages can be eliminated, but on the other hand, the deterioration of the material progresses. In other words, as mentioned above, the temperature of the injection cylinder is set at the optimum temperature so that the material does not change in quality, but even if the temperature is within this permissible temperature, a considerable amount of change in quality occurs, which is caused by the inside of the injection cylinder. The longer the residence time of the material, the more it progresses and may eventually cause decomposition of the material.
(問題点を解決するための手段)
本発明は上述した従来の問題点を解決したもので、下記
に示す射出成形機の温度制御方法によって達成すること
ができる。(Means for Solving the Problems) The present invention solves the above-mentioned conventional problems, and can be achieved by the temperature control method for an injection molding machine described below.
つまり、本発明に係る温度制御方法は射出成形機におけ
る射出シリンダ温度を制御するに際し、先ず正常時には
成形材料に適合した正規温度に制御する。他方、異常時
には異常発生を検知し、当該検知によって上記正規温度
よりも低い温度に制御するようにしたことを特徴とする
。That is, when controlling the temperature of an injection cylinder in an injection molding machine, the temperature control method according to the present invention first controls the temperature to a normal temperature suitable for the molding material during normal times. On the other hand, when an abnormality occurs, the occurrence of the abnormality is detected, and the temperature is controlled to be lower than the normal temperature based on the detection.
(作用) 次に、本発明の作用について説明する。(effect) Next, the operation of the present invention will be explained.
本発明に係る温度制御方法は異常時、つまり、射出シリ
ンダ内に材料が長時間溶融状態で滞留する場合には、異
常発生の検知によって正常時における正規温度よりも低
い温度、例えば成形しようとする材料が凝固せず、且つ
変質、分解の生じにくい温度に設定する。これにより射
出シリンダの予備加熱が行われ、再運転時においても迅
速に正規温度に復帰する。In the temperature control method according to the present invention, when there is an abnormality, that is, when the material remains in a molten state for a long time in the injection cylinder, the abnormality is detected and the temperature is lower than the normal temperature under normal conditions, for example, when molding is attempted. Set the temperature at which the material does not solidify and is unlikely to undergo deterioration or decomposition. As a result, the injection cylinder is preheated, and the temperature is quickly returned to the normal temperature even when restarting the operation.
(実施例)
以下には本発明に係る好適な実施例を図面に基づいて詳
細に説明する。(Example) Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.
第1図は本発明係る温度制御方法を実施する射出成形機
の一例を示す樅断側面図である。FIG. 1 is a cross-sectional side view showing an example of an injection molding machine implementing the temperature control method according to the present invention.
先ず、第1図を参照して射出成形機の概略構成について
説明する。同図はインラインスクリュ式射出成形機Mを
示す。同成形機Mは射出装置2と、この前方に配設した
金型3を含む型締袋W4からなる。射出装置2は加熱筒
を含む射出シリンダ5とこの射出シリンダ5に内挿した
スクリュ6を備える。射出シリンダ5の前端には射出ノ
ズル7を備え、また後端寄り上部には材料Wを射出シリ
ンダ5内へ供給するホッパ8を備える。一方、スクリュ
6の後端はスクリュ6を回転させるオイルモータ9と、
スクリュ6を前進後退させる油圧シリンダ10に結合す
る。First, the schematic structure of an injection molding machine will be explained with reference to FIG. The figure shows an in-line screw type injection molding machine M. The molding machine M consists of an injection device 2 and a mold bag W4 including a mold 3 disposed in front of the injection device 2. The injection device 2 includes an injection cylinder 5 including a heating cylinder and a screw 6 inserted into the injection cylinder 5. An injection nozzle 7 is provided at the front end of the injection cylinder 5, and a hopper 8 for supplying the material W into the injection cylinder 5 is provided at the upper part near the rear end. On the other hand, the rear end of the screw 6 is equipped with an oil motor 9 that rotates the screw 6.
The screw 6 is connected to a hydraulic cylinder 10 that moves the screw 6 forward and backward.
次に、第2図を参照して要部構成について詳細に説明す
る。Next, the configuration of main parts will be explained in detail with reference to FIG.
同図は本発明に係る温度制御方法を実施する温度制御装
置のブロック図である。This figure is a block diagram of a temperature control device that implements the temperature control method according to the present invention.
先ず、射出シリンダ5は第1図のようにノズル部Z1、
前部Z2、中間部Z3、後部Z4の4つのゾーンに分割
できる。First, the injection cylinder 5 has a nozzle part Z1, as shown in FIG.
It can be divided into four zones: front Z2, middle Z3, and rear Z4.
そして、各ゾーンはそれぞれ加熱ゾーンを構成し、第2
図のようにバンドヒータH1、H2、H3、H4、を備
える。また、各ゾーンごとに温度センサS1、S2、S
3、S4を配設し、それぞれ各ゾーンごとに独立して温
度制御される。Each zone constitutes a heating zone, and a second
As shown in the figure, band heaters H1, H2, H3, and H4 are provided. In addition, temperature sensors S1, S2, and S are provided for each zone.
3 and S4 are arranged, and the temperature is controlled independently for each zone.
各バンドヒータH1・・・、及び温度センサS1・・・
は温度コントローラ20に接続する。一方、同コントロ
ーラ20各ゾーンZ1 ・・・毎に成形温度を設定する
ための成形温度設定器Tl 、T2、T3 、T4 、
及び異常時に切換える低温設定器t1、t2、t3、t
4を接続する。さらにまた、同コントローラ20には射
出成形器Mの運転を制御、監視する中央コントローラ2
1を接続する。なお、バンドヒータ、温度センサ、各設
定器を示す符号に添えた番号は前記各ゾーンを示す符号
の番号と一致する。Each band heater H1... and temperature sensor S1...
is connected to the temperature controller 20. On the other hand, the controller 20 has molding temperature setting devices Tl, T2, T3, T4, for setting the molding temperature for each zone Z1...
and low temperature setting devices t1, t2, t3, t that are switched in case of abnormality.
Connect 4. Furthermore, the controller 20 includes a central controller 2 that controls and monitors the operation of the injection molding machine M.
Connect 1. Note that the numbers attached to the symbols indicating the band heater, temperature sensor, and each setting device match the numbers of the symbols indicating each zone.
次に、本発明に係る温度制御方法について説明する。Next, a temperature control method according to the present invention will be explained.
先ず、予め成形温度設定器T1 ・・・によって使用す
る材料に最も通した成形温度、つまり、正常時における
正規温度を各ゾーンZ1 ・・・毎に設定する。また、
低温設定器t1 ・・・によって使用する材料を長時間
射出シリンダ5内へ滞留させておいても材料が凝固、変
質、分解しない温度、つまり上記正規温度よりも低い温
度を各ゾーンZ1・・・毎に設定する。この温度は実験
的に求めることができる。First, the molding temperature at which the material to be used is passed through most, that is, the normal temperature at normal times, is set in advance for each zone Z1 using the molding temperature setting device T1. Also,
A low temperature setting device t1... sets a temperature at which the material to be used will not solidify, change or decompose even if it is allowed to stay in the injection cylinder 5 for a long time, that is, a temperature lower than the above-mentioned normal temperature, for each zone Z1... Set each time. This temperature can be determined experimentally.
今、射出成形器Mが正常運転を行っている場合を想定す
る。この場合には温度コントローラ20によって前記ヒ
ータ旧・・・を成形温度設定器T1 ・・・で設定した
成形温度に制御する。つまり、温度センサS1 ・・・
からの設定データを比較し常に一定温度となるように、
ヒータH1・・・を0N−OFFさせてフィードバック
制御を行う。Now, assume that the injection molding machine M is operating normally. In this case, the temperature controller 20 controls the former heaters to the molding temperature set by the molding temperature setter T1. In other words, temperature sensor S1...
To ensure that the temperature is always constant by comparing the setting data from
Feedback control is performed by turning off the heater H1.
一方、射出成形機Mに異常が発生し、射出成形機Mの運
転を停止させた場合を想定する。なお、この場合の異常
とはその修復にある程度の時間を要求するがヒータH1
・・・を叶Fにする必要のない場合をいい、例えば■ス
クリュ、トーピードの折損、破損により計量、射出の位
置、時間に異常を生じたとき、■成形品がショートショ
ットでキャビティ型に残留してしまい、射出前進限位置
に異常を生じたとき、■材料が材料供給口(ホッパ)で
おこし状に固まり、材料が供給されずに計量異常が発生
した時等を挙げることができる。なお、■の場合にはス
クリュ、1・−ピードを射出シリンダ内から取り出して
交換しなければならないため材料が固化すると抜けなく
なる。また分解した場合には清浄が大変となる。■の場
合にはキャビティに残っている成形品を取り除く必要が
あり、金型に傷を付けないように注意して行う、■の場
合にはホッパを取り外し、固まった材料を取り除くか、
つついてほぐす必要がある。On the other hand, assume that an abnormality occurs in the injection molding machine M and the operation of the injection molding machine M is stopped. Note that the abnormality in this case requires a certain amount of time to repair, but the heater H1
This refers to cases where it is not necessary to use F for ..., for example: ■ When a screw or torpedo is broken or damaged, resulting in an abnormality in measuring, injection position, or time; ■ When a molded product remains in the cavity mold due to a short shot. Examples include when an abnormality occurs at the injection advance limit position, and (2) when the material hardens at the material supply port (hopper) and the material is not supplied, resulting in a metering error. In the case of (2), the screw and 1-peed must be removed from the injection cylinder and replaced, so they cannot be removed once the material solidifies. Moreover, if it is disassembled, cleaning becomes difficult. In the case of ■, it is necessary to remove the molded product remaining in the cavity, taking care not to damage the mold.In the case of ■, remove the hopper and remove the hardened material, or
I need to peck it out.
このような異常が生じた場合には中央コントローラ21
から異常信号が送られ、温度コントローラ20では当該
異常信号に基づいて成形温度設定器T1 ・・・から低
温設定器t1 ・・・に自動的に切り換える。If such an abnormality occurs, the central controller 21
An abnormal signal is sent from the temperature controller 20, and the temperature controller 20 automatically switches from the molding temperature setter T1 to the low temperature setter t1 based on the abnormal signal.
この結果、異常発生時には低温設定器t1 ・・・によ
り設定した前記正規温度より低い温度で制御する。つま
り、温度センサS1・・・からの検出データと設定器t
1 ・・・からの設定データを比較し常に一定温度とな
るようにヒータH1・・・を0N−OFFさせフィード
バック制御を行う。As a result, when an abnormality occurs, the temperature is controlled to be lower than the normal temperature set by the low temperature setting device t1. In other words, the detection data from the temperature sensor S1... and the setting device t
1. Compare the setting data from . . . and perform feedback control by turning off the heater H1 . . . so that the temperature is always constant.
そして、修復が完了したなら例えば制御盤上の異常解除
スイッチ(不図示)を押すことによって低温設定器t1
・・・から成形温度設定器T1へ再び切り換える。こ
れにより、射出シリンダ温度は正規温度まで短時間に昇
温し、以後正常状態で成形を続行できる。When the repair is completed, for example, by pressing an abnormality release switch (not shown) on the control panel, the low temperature setting device t1 is reset.
. . . to switch again to the molding temperature setting device T1. As a result, the temperature of the injection cylinder is raised to the normal temperature in a short time, and molding can be continued in the normal state thereafter.
以上、実施例について詳細に説明したが、本発明はこの
ような実施例に限定されるものではない。Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.
例えば異常時における低温度の設定は低@設定器により
個別に設定したが、成形温度(正規温度)に対し一定の
比率で減少させるように回路的に構成してもよい。また
、温度切換えを行う異常の種類も、前述した例示に限ら
ず、検知が可能なすべての異常であってもよく適宜選択
して決定できる。For example, although the setting of the low temperature at abnormal times is individually set by the low@ setting device, the circuit may be configured to decrease the temperature at a fixed ratio with respect to the molding temperature (normal temperature). Further, the type of abnormality for which temperature switching is performed is not limited to the above-mentioned example, and may be any abnormality that can be detected, and can be appropriately selected and determined.
さらにまた、異常発生時に低温に切換えてから所定の時
間経過しても異常解除スイッチが入力されない場合には
自動的にヒータがOFFになるような回路を設けてもよ
い。Furthermore, a circuit may be provided that automatically turns off the heater if the abnormality release switch is not input even after a predetermined period of time has elapsed after switching to the low temperature when an abnormality occurs.
また、ヒータは任意の加熱手段を利用できるし、加熱ゾ
ーンも例示では4つのゾーンを挙げたが単数又は任意数
量のゾーンであってもよい。また、インラインスクリュ
式の射出成形機を例示したがプランジャ式の射出成形機
等、他の任意の射出成形機に適用できる。Further, any heating means can be used as the heater, and although four zones are illustrated in the example, the heating zone may be a single zone or an arbitrary number of zones. Further, although an in-line screw type injection molding machine is illustrated, the present invention can be applied to any other injection molding machine such as a plunger type injection molding machine.
その他、細部の構成、条件等において、本発明の精神を
逸脱しない範囲で任意に変更実施できる。In addition, the detailed structure, conditions, etc. may be arbitrarily changed without departing from the spirit of the present invention.
(発明の効果)
このように、本発明に係る射出成形機の温度制御方法は
、射出成形機における射出シリンダ温度を制御するに際
し、正常時には成形材料に適合した正規温度に制御する
とともに、異常時には異常発生を検知し、当該検知によ
って正規温度よりも低い温度に制御するようしたため、
射出成形装置に異常が発生し、修復の間射出シリンダに
材料が長時間滞留することがあっても材料の変質、分解
等の品質劣化を生ずることがな(、しかも、修復完了後
においては昇温時間を著しく短縮できるため稼働能率、
生産性向上を図ることができる。また、単にソフトウェ
ア的に実施できるため構造上の変更を要することなくき
わめて低コストに実施できる。(Effects of the Invention) As described above, the temperature control method for an injection molding machine according to the present invention controls the temperature of the injection cylinder in the injection molding machine to a normal temperature suitable for the molding material during normal times, and when abnormal We detected an abnormality and controlled the temperature to be lower than the normal temperature based on the detection.
Even if an abnormality occurs in the injection molding equipment and the material remains in the injection cylinder for a long time during repair, quality deterioration such as material deterioration or decomposition will not occur (in addition, after the repair is completed, the material will remain in the injection cylinder for a long time). Operational efficiency is improved by significantly shortening heating time.
Productivity can be improved. Moreover, since it can be implemented simply by software, it can be implemented at extremely low cost without requiring any structural changes.
第1図は本発明に係る温度制御方法を実施する射出成形
機の一例を示す縦断側面図、第2図は本発明に係る温度
制御方法を実施する温度制御装置のブロック図。
尚図面中、5・・・射出シリンダ、
20・・・温度コントローラ、
21・・・中央コントローラ、
Hl、H2,H3,H4・・・バンドヒータ、Sl、3
2,33.34・・・温度センサ、Tl、T2.T3.
T4・・・成形温度設定器、tl、t2.t3.tt・
・・低温設定器。
第 2 図FIG. 1 is a longitudinal side view showing an example of an injection molding machine that implements the temperature control method according to the present invention, and FIG. 2 is a block diagram of a temperature control device that implements the temperature control method according to the present invention. In the drawings, 5... Injection cylinder, 20... Temperature controller, 21... Central controller, Hl, H2, H3, H4... Band heater, Sl, 3
2,33.34...Temperature sensor, Tl, T2. T3.
T4... Molding temperature setter, tl, t2. t3. tt・
...Low temperature setting device. Figure 2
Claims (1)
際し、正常時には成形材料に適合した正規温度に制御す
るとともに、異常時には異常発生を検知し、当該検知に
よって前記正規温度よりも低い温度に制御することを特
徴とする射出成形機の温度制御方法。1. When controlling the temperature of the injection cylinder in an injection molding machine, during normal times the temperature is controlled to a normal temperature that is suitable for the molding material, and when abnormalities occur, the occurrence of an abnormality is detected and the temperature is controlled to be lower than the normal temperature based on the detection. A temperature control method for an injection molding machine characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17533085A JPS6235824A (en) | 1985-08-09 | 1985-08-09 | Temperature controlling of injection molder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17533085A JPS6235824A (en) | 1985-08-09 | 1985-08-09 | Temperature controlling of injection molder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6235824A true JPS6235824A (en) | 1987-02-16 |
JPH0578404B2 JPH0578404B2 (en) | 1993-10-28 |
Family
ID=15994185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17533085A Granted JPS6235824A (en) | 1985-08-09 | 1985-08-09 | Temperature controlling of injection molder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6235824A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0423750A2 (en) * | 1989-10-18 | 1991-04-24 | Toshiba Kikai Kabushiki Kaisha | Method of controlling injection molding machines |
US7104681B2 (en) * | 2003-02-10 | 2006-09-12 | ICIPC—Instituto De Capacitacion E Investigacion Del Plastico Y Del Caucho | Method and device to determine the thermal diffusivity of materials, such as thermoplastic polymers, during non-stationary heat transfer processes |
JP2006305777A (en) * | 2005-04-26 | 2006-11-09 | Toshiba Mach Co Ltd | Control device of injection molding machine |
JP2011201098A (en) * | 2010-03-25 | 2011-10-13 | Nissei Plastics Ind Co | Method for treating abnormality of injection molding machine |
JP2012035417A (en) * | 2010-08-03 | 2012-02-23 | Nissei Plastics Ind Co | Injection device |
EP2572854A1 (en) * | 2011-09-22 | 2013-03-27 | Sumitomo Heavy Industries, Ltd. | Injection molding machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5421574U (en) * | 1977-07-13 | 1979-02-13 |
-
1985
- 1985-08-09 JP JP17533085A patent/JPS6235824A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5421574U (en) * | 1977-07-13 | 1979-02-13 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0423750A2 (en) * | 1989-10-18 | 1991-04-24 | Toshiba Kikai Kabushiki Kaisha | Method of controlling injection molding machines |
US7104681B2 (en) * | 2003-02-10 | 2006-09-12 | ICIPC—Instituto De Capacitacion E Investigacion Del Plastico Y Del Caucho | Method and device to determine the thermal diffusivity of materials, such as thermoplastic polymers, during non-stationary heat transfer processes |
JP2006305777A (en) * | 2005-04-26 | 2006-11-09 | Toshiba Mach Co Ltd | Control device of injection molding machine |
JP2011201098A (en) * | 2010-03-25 | 2011-10-13 | Nissei Plastics Ind Co | Method for treating abnormality of injection molding machine |
JP2012035417A (en) * | 2010-08-03 | 2012-02-23 | Nissei Plastics Ind Co | Injection device |
EP2572854A1 (en) * | 2011-09-22 | 2013-03-27 | Sumitomo Heavy Industries, Ltd. | Injection molding machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0578404B2 (en) | 1993-10-28 |
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