JPH03230929A - Method of controlling injection molding machine and apparatus therefor - Google Patents

Method of controlling injection molding machine and apparatus therefor

Info

Publication number
JPH03230929A
JPH03230929A JP2691790A JP2691790A JPH03230929A JP H03230929 A JPH03230929 A JP H03230929A JP 2691790 A JP2691790 A JP 2691790A JP 2691790 A JP2691790 A JP 2691790A JP H03230929 A JPH03230929 A JP H03230929A
Authority
JP
Japan
Prior art keywords
injection
temperature
molding material
heat
molding machine
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
Application number
JP2691790A
Other languages
Japanese (ja)
Inventor
Hisashi Shiraishi
白石　比佐志
Tadashi Nakamura
正 中村
Katsunori Kurumachi
克典 車地
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP2691790A priority Critical patent/JPH03230929A/en
Publication of JPH03230929A publication Critical patent/JPH03230929A/en
Pending 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
    • 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
    • B29C45/73—Heating or cooling of the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To enable a mold to be opened simultaneously with the curing of a molding, and thus improve the molding efficiency by obtaining the necessary cooling time for molding from the specific heat of a molding material, curing temperature, and heat transfer coefficient, and, the weight of a molding, the surface area thereof, and the injection temperature of the molding material, and further carrying out mold opening after a lapse of the necessary cooling time from the completion of injection. CONSTITUTION:A control unit 8 is provided with calculators 16, 18, 20, setter 12, 14, and a timer 22. The calculator 20 acts to receive the temperature 4a immediately before injection, the quantity of heat 18a, the curing temperature 36, and the heat transfer coefficient of a molding material from the setter 12, on the other hand, receive the surface area 40 of the molding from the setter 14 in order to calculate the necessary cooling quantity of heat 20b per unit time, and further, calculate the necessary cooling time 20a by dividing the quantity of heat of the molding by the necessary cooling quantity of heat 20b per unit time, and then acts to output this value to the timer 22. The timer 22 receives the completion signal 6b of injection and starts time measurement, and outputs a mold opening signal 22a after a lapse of the necessary cooling time 20a. Whereby mold opening can be conducted by the shortest cooling time.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、射出成形機の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 method and apparatus for controlling an injection molding machine.

（ロ）従来の技術 射出成形機を用いて金型内に溶融した成形材料を射出し
た後、金型を冷却して成形品を固化させる工程が必要で
ある。これによって金型から成形品を取り出すことがで
きる。従来この冷却時間の設定は、成形作業者の経験に
基づいて行っていた。(b) Conventional technology After injecting molten molding material into a mold using an injection molding machine, it is necessary to cool the mold and solidify the molded product. This allows the molded product to be removed from the mold. Conventionally, this cooling time was set based on the experience of the molding operator.

（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方法によると、同一
の成形条件であっても、設定される冷却時間は、作業者
によって異なった値となるだけでなく、必要十分な冷却
時間よりも長めに取られる傾向があり、生産能率を向上
できないという問題点がある。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。(c) Problems to be Solved by the Invention However, according to the conventional method as described above, even if the molding conditions are the same, the cooling time set not only differs depending on the operator, but also There is a problem that the cooling time tends to be longer than the necessary and sufficient cooling time, and production efficiency cannot be improved. 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、成形材料の比熱・固化温度・熱伝達係数と、
成形品の重量・表面積と、成形材料の射出温度と、から
成形品の必要冷却時間を求めることにより、上記課題を
解決する。すなわち、第１項の発明の射出成形機の制御
方法は、成形材料の比熱（３４）・固化温度（３６）・
熱伝達係数（３８）と、成形品の重量（１６ａ）　　・
表面積（４０）と、成形材料の射出温度（４ａ）と、か
ら成形品の必要冷却時間（２０ａ）を求め、射出完了か
ら上記必要冷却時間（２０ａ）が経過したとき型開きを
行わせるようにしている。(d) Means for solving the problem The present invention provides specific heat, solidification temperature, and heat transfer coefficient of the molding material,
The above problem is solved by determining the required cooling time of the molded product from the weight and surface area of the molded product and the injection temperature of the molding material. That is, the method for controlling an injection molding machine according to the invention of item 1 is based on the specific heat (34), solidification temperature (36), and solidification temperature (36) of the molding material.
Heat transfer coefficient (38) and weight of molded product (16a) ・
The required cooling time (20a) of the molded product is determined from the surface area (40) and the injection temperature (4a) of the molding material, and the mold is opened when the required cooling time (20a) has elapsed from the completion of injection. ing.

また第２項の発明の射出成形機の制御方法は、射出成形
機バレル内径部の断面積（３０）、平均射出ストローク
（］、６ｂ）、成形材料の密度（３２）・比熱（３４）
・固化温度（３６）熱伝達係数（３８）と、成形品の表
面積（４０）と、をあらかじめ求めておき、 射出直前の成形材料の温度（４ａ）を測定し、射出成形
機バレル内径部の断面積（３０）と、平均射出ストロー
ク（１６ｂ）と、成形材料の密度（３２）・比熱（３４
）と、射出直前の成形材料の温度（４ａ）と、から成形
品の有する熱量（１８ａ）を算出し、 成形品の表面積（４０）・熱伝達係数 （３８）・固化温度（３６）と、射出直前の成形材料の
温度（４ａ）と、がら単位時間あたりの必要冷却熱量（
２０ｂ）を算出し、 算出された成形品の有する熱量（１８ａ）を、算出され
た単位時間あたりの必要冷却熱量（２０ｂ）で除するこ
とにより、必要冷却時間（２０ａ）を求め、 射出完了から上記必要冷却時間（２０ａ）が経過したと
き型開きを行わせるようにしている。In addition, the method for controlling an injection molding machine according to the invention in item 2 includes the cross-sectional area (30) of the inner diameter part of the barrel of the injection molding machine, the average injection stroke (], 6b), the density (32) and specific heat (34) of the molding material.
- Obtain the solidification temperature (36), heat transfer coefficient (38), and surface area (40) of the molded product in advance, measure the temperature of the molding material (4a) just before injection, and measure the temperature of the inside diameter of the injection molding machine barrel. Cross-sectional area (30), average injection stroke (16b), density (32) and specific heat (34) of the molding material
), the temperature of the molding material just before injection (4a), and the amount of heat possessed by the molded product (18a), and then calculate the surface area (40), heat transfer coefficient (38), solidification temperature (36) of the molded product, and The temperature of the molding material just before injection (4a) and the required amount of cooling heat per unit time (
20b), and divide the calculated heat amount of the molded product (18a) by the calculated required cooling heat amount per unit time (20b) to find the required cooling time (20a), and from the completion of injection. The mold is opened when the required cooling time (20a) has elapsed.

更に、第３項の発明の射出成形機の制御方法は、第２項
の発明の平均射出ストローク（１６）に代えて、そのつ
と射出ストローク（１６ｂ’）を測定し、必要冷却時間
（２０ａ）を演算するようにしている。Furthermore, in the method for controlling an injection molding machine according to the invention in item 3, instead of the average injection stroke (16) in the invention in item 2, the average injection stroke (16b') is measured, and the required cooling time (20a) is measured. I am trying to calculate.

また、上記方法を実施するだめの第４項の発明の装置は
、射出成形機のバレル（５ｏ）内の成形材料の温度を測
定して温度信号を出力可能な温度センサ（４）と、制御
器（８）と、を有しており、制御器（８）には、設定器
（１２・１４）、演算器（１６・１８・２０）及びタイ
マ（２２）が設けられており、設定器（１２・１４）は
、あらかじめ射出成形機バレル内径部の断面積（３０）
、平均射出ストローク（１６ｂ）、成形材料の密度（３
２）・比（３４）・固化温度（３６）・熱伝達係数（３
８）及び成形品の表面積（４０）を設定可能であり、演
算器（１６・１８・２０）は、上記測定信号（４ａ）及
び上記設定値（１６ｂ・３０・３２・３４・３６・３８
・４０）を用いて必要冷却時間（２０ａ）を算出可能で
あり、タイマ（２２）は、射出終了信号（６ｂ）によっ
て計時を開始し上記必要冷却時間（２０ａ）を経過する
と型開き信号（２２ａ）を出力するように構成されてい
る。Further, the apparatus of the invention of item 4 for carrying out the above method includes a temperature sensor (4) capable of measuring the temperature of the molding material in the barrel (5o) of the injection molding machine and outputting a temperature signal, and a control device. The controller (8) is provided with a setting device (12, 14), an arithmetic unit (16, 18, 20), and a timer (22). (12・14) is the cross-sectional area (30) of the inner diameter part of the injection molding machine barrel in advance.
, average injection stroke (16b), density of molding material (3
2)・Ratio (34)・Solidification temperature (36)・Heat transfer coefficient (3
8) and the surface area (40) of the molded product can be set.
- The required cooling time (20a) can be calculated using ) is configured to output.

更に、第５項の発明の装置は、第４項の発明において、
あらかじめ平均射出ストローク（１６）を設定器（１２
）に設定していたのに代えて、射出成形機のバレル（５
０）内のスクリュー（５２）の位置を測定して位置信号
を出力可能な位置センサ（２）と、切換器（１０）とが
設けられており、切換器（１０）は、射出成形機からの
射出開始信号（６ａ）を受けたときの位置センサ（２）
からの信号を射出開始位置測定信号（１０ａ）として出
力する一方、射出終了信号（６ｂ）を受けたときの位置
センサ（２）からの信号を射出終了位置測定信号（Ｊｏ
ｂ）として出力することが可能であり、これらの信号を
用いて必要冷却時間（２０ａ）を演算し、必要冷却時間
（２０ａ）を経過すると型開き信号（２２ａ）を出力す
るようにしている。なお、かっこ内の符号は実施例の対
応する部材を示す。Furthermore, the device of the invention of item 5, in the invention of item 4,
Set the average injection stroke (16) in advance on the setting device (12).
), the barrel of the injection molding machine (5
A position sensor (2) capable of measuring the position of the screw (52) in the injection molding machine and outputting a position signal, and a switch (10) are provided. position sensor (2) when receiving the injection start signal (6a) of
The signal from the position sensor (2) when receiving the injection end signal (6b) is output as the injection end position measurement signal (Jo).
These signals can be used to calculate the required cooling time (20a), and when the required cooling time (20a) has elapsed, a mold opening signal (22a) is output. Note that the symbols in parentheses indicate corresponding members in the embodiment.

（ホ）作用 あらかじめ、制御器には、射出成形機バレル内径部の断
面積、平均射出ストローク、成形材料の密度・比熱・固
化温度・熱伝達係数と、成形品の表面積と、が記憶され
ている。射出成形機のバレル内部の計量部の樹脂温度は
、これを測定する温度センサによって常に制御器に入力
されている。(E) Function The controller stores in advance the cross-sectional area of the inner diameter of the injection molding machine barrel, the average injection stroke, the density, specific heat, solidification temperature, and heat transfer coefficient of the molding material, and the surface area of the molded product. There is. The resin temperature in the metering section inside the barrel of the injection molding machine is constantly input to the controller by a temperature sensor that measures it.

例えば、射出用流体圧シリンダから射出開始信号が制御
器に人力されると、制御器は、このときの温度を成形材
料の射出直前の温度として記憶する。成形材料が金型内
に射出され、例えば、射出用流体圧シリンダから射出終
了信号が制御器に入力されると、制御器はタイマをスタ
ートさせるとともに、平均射出ストロークと上記断面積
とを掛は合せて成形品の容積とし、これと上記密度とを
掛は合せて成形品の重量とする。重量と上記比熱とを掛
は合せて射出された成形品の有する熱量とする。一方、
上記射出直前の温度から上記固化温度を減算して冷却温
度幅を求め、上記表面積、熱伝達係数及び冷却温度幅を
それぞれ乗算して、単位時間あたりの必要冷却熱量を算
出する。For example, when an injection start signal is manually input to the controller from the injection fluid pressure cylinder, the controller stores the temperature at this time as the temperature immediately before injection of the molding material. When the molding material is injected into the mold and, for example, an injection end signal is input to the controller from the injection fluid pressure cylinder, the controller starts a timer and multiplies the average injection stroke by the above cross-sectional area. The total volume is the volume of the molded product, and the product of this and the above density is the weight of the molded product. The weight and the above-mentioned specific heat are multiplied together to give the amount of heat possessed by the injected molded product. on the other hand,
The cooling temperature width is determined by subtracting the solidification temperature from the temperature immediately before injection, and the required amount of cooling heat per unit time is calculated by multiplying the surface area, heat transfer coefficient, and cooling temperature width.

上記成形品の熱量を上記単位時間あたりの必要冷却熱量
で除して必要冷却時間を求める。タイマは必要冷却時間
を経過すると、型開き信号を出力し、型開きが行われる
。これにより最短の冷却時間で型開きを行うことが可能
になる。The required cooling time is determined by dividing the amount of heat of the molded product by the amount of cooling heat required per unit time. When the required cooling time has elapsed, the timer outputs a mold opening signal and the mold is opened. This makes it possible to open the mold in the shortest cooling time.

また、あらかじめ、制御器には、射出成形機バレル内径
部の断面積、成形材料の密度・比熱・固化温度・熱伝達
係数と、成形品の表面積と、が記憶されている。射出成
形機のバレル内にしゅう動回転可能にはめ合わされたス
クリューのストローク位置は、例えばスクリューに連結
された位置センサによって常に制御器に入力されている
。Further, the controller stores in advance the cross-sectional area of the inner diameter part of the barrel of the injection molding machine, the density, specific heat, solidification temperature, and heat transfer coefficient of the molding material, and the surface area of the molded product. The stroke position of a screw slidably fitted into the barrel of an injection molding machine is constantly input to a controller, for example by a position sensor connected to the screw.

一方、例えばバレル内部の計量部の樹脂温度は、これを
測定する温度センサによって常に制御器に入力されてい
る。例えば、射出用流体圧シリンダから射出開始信号が
制御器に入力されると、制御器は、このときのスクリュ
ー位置を射出開始位置として、また、このときの温度を
成形材料の射出直前の温度として記憶する。成形材料か
金型内に射出され、例えば、射出用流体圧シリンダから
射出終了信号が制御器に入力されると、制御器は、この
ときのスクリュー位置を射出終了位置として記憶すると
共に、タイマをスタートさせる。更に制御器は、両位置
信号から射出ストロークを算出し、これと上記断面積と
を掛は合せて成形品の容積とし、これと上記密度とを掛
は合せて成形品の重量とする。重量と上記比熱とを掛は
合せて射出された成形品の有する熱量とする。一方、上
記射出直前の温度から上記固化温度を減算して冷却温度
幅を求め、上記表面積、熱伝達係数及び冷却温度幅をそ
れぞれ乗算して、単位時間あたりの必要冷却熱量を算出
する。上記成形品の熱量を上記単位時間あたりの必要冷
却熱量で除して必要冷却時間を求める。タイマは必要冷
却時間を経過すると、型開き信号を出力し、型開きが行
われる。これにより最短の冷却時間で型開きを行うこと
が可能になる。On the other hand, for example, the resin temperature in the metering section inside the barrel is constantly input to the controller by a temperature sensor that measures it. For example, when an injection start signal is input to the controller from the injection fluid pressure cylinder, the controller sets the screw position at this time as the injection start position and the temperature at this time as the temperature of the molding material immediately before injection. Remember. When the molding material is injected into the mold and, for example, an injection end signal is input to the controller from the injection fluid pressure cylinder, the controller stores the screw position at this time as the injection end position and also starts the timer. Let it start. Further, the controller calculates an injection stroke from both position signals, multiplies this by the cross-sectional area to obtain the volume of the molded product, and multiplies this by the density to determine the weight of the molded product. The weight and the above-mentioned specific heat are multiplied together to give the amount of heat possessed by the injected molded product. On the other hand, the cooling temperature width is determined by subtracting the solidification temperature from the temperature immediately before injection, and the required amount of cooling heat per unit time is calculated by multiplying the surface area, heat transfer coefficient, and cooling temperature width. The required cooling time is determined by dividing the amount of heat of the molded product by the amount of cooling heat required per unit time. When the required cooling time has elapsed, the timer outputs a mold opening signal and the mold is opened. This makes it possible to open the mold in the shortest cooling time.

（へ）実施例 第１及び２図に本発明の第１実施例を示す。射出成形機
のバレル５０内に、しゅう動回転可能にスクリュー５２
がはめ合わされている。スクリュー５２は、これと連結
される流体圧シリンダ５４によってバレル５０内を往復
運動可能である。ホッパ５８内の成形材料６０は、バレ
ル５０内において、スクリュー５２によって混線、溶融
されるようになっている。バレル５０の計量室５０ａに
近い部分に温度センサ４が取り付けられており、成形材
料の温度を測定して温度測定信号４ａを出力することが
可能である。制御器８には、演算器１６・１８・２０．
設定器１２・１４及びタイマ２２が設けられている。設
定器１２には、あらかじめ平均射出ストローク１６ｂ、
射出成形機バレル内径部の断面積３０、成形材料の密度
３２・比熱３４・固化温度３６及び熱伝達係数３８を設
定可能であり、また設定器１４には、成形品の表面積４
０を設定可能である。演算器１６・１８・２０は、上記
測定信号４ａを受は取る一方、上記設定信号１６ｂ・３
０・３２・３４・３６・３８・４０を受は取って、必要
な演算を行うことが可能であり、タイマ２２は型開き信
号２２ａを出力することが可能である。(F) Embodiment Figures 1 and 2 show a first embodiment of the present invention. A screw 52 is slidably and rotatably installed in the barrel 50 of the injection molding machine.
are fitted together. The screw 52 can be reciprocated within the barrel 50 by a hydraulic cylinder 54 connected thereto. The molding material 60 in the hopper 58 is mixed and melted by the screw 52 in the barrel 50. A temperature sensor 4 is attached to a portion of the barrel 50 near the measuring chamber 50a, and is capable of measuring the temperature of the molding material and outputting a temperature measurement signal 4a. The controller 8 includes computing units 16, 18, 20 .
Setting devices 12 and 14 and a timer 22 are provided. The setting device 12 has an average injection stroke 16b,
It is possible to set the cross-sectional area 30 of the inner diameter part of the injection molding machine barrel, the density 32, specific heat 34, solidification temperature 36, and heat transfer coefficient 38 of the molding material, and the setting device 14 also allows setting the surface area 4 of the molded product.
Can be set to 0. The computing units 16, 18, and 20 receive and receive the measurement signal 4a, while receiving the setting signals 16b and 3.
0, 32, 34, 36, 38, and 40 can be used to perform necessary calculations, and the timer 22 can output a mold opening signal 22a.

以下、この実施例の作動を説明する。設定器１２には、
成形材料６０に関する情報として、あらかじめ平均射出
ストローク１６ｂ、射出成形機バレル内径部の断面積３
０．成形材料の、密度３２・比熱３４・固化温度３６及
び熱伝達係数３８が設定されている。平均射出ストロー
ク１、６　ｂは、射出ストローク１６ｂ°を所定の回数
測定し、その平均値を取ったものである。また、設定器
１４には、成形品に関する情報として、あらかじめ成形
品の表面積４０が設定されている。The operation of this embodiment will be explained below. The setting device 12 includes
As information regarding the molding material 60, the average injection stroke 16b and the cross-sectional area 3 of the inner diameter of the barrel of the injection molding machine are provided in advance.
0. The density 32, specific heat 34, solidification temperature 36, and heat transfer coefficient 38 of the molding material are set. The average injection stroke 1, 6b is obtained by measuring the injection stroke 16b° a predetermined number of times and taking the average value. Furthermore, the surface area 40 of the molded product is preset in the setting device 14 as information regarding the molded product.

演算器１６は、設定器１２から平均射出ストロク１６ｂ
、射出成形機バレル内径部の断面積３０及び成形材料の
密度３２を受は取り、射出された材料の重量１６ａを演
算して演算器１８に出力する。演算器１８は、射出開始
信号６ａの入力を受Ｇづたときの温度センサ４からの信
号を、成形材料の射出直前の温度測定信号４ａとして受
は取る＝−方、設定器１２から比熱３４を受は取って、
成形品の有する熱量１８ａを演算して演算器２０に出力
する。演算器２０は、設定器１２から成形材料の、−ト
記射出直前の温度４ａ・熱量１８ａ・固化温度３６及び
熱伝達係数３８を受は取る一方、設定器１４から成形品
の表面積４０を受取り、単位時間あたりの必要冷却熱量
２０ｂを演算し、成形品の有する熱量１８ａを単位時間
あたりの必要冷却熱量２０ｂで除して必要冷却時間２０
ａを演算し、これをタイマ２２に出力する。これらを式
で表せば次のようになる。The calculator 16 calculates the average injection stroke 16b from the setting device 12.
, the cross-sectional area 30 of the inner diameter part of the barrel of the injection molding machine and the density 32 of the molding material are taken, and the weight 16a of the injected material is calculated and output to the calculator 18. The computing unit 18 receives the signal from the temperature sensor 4 when receiving the input of the injection start signal 6a as the temperature measurement signal 4a immediately before injection of the molding material. The receiver took the
The amount of heat 18a possessed by the molded product is calculated and output to the calculator 20. The calculator 20 receives and receives the temperature 4a, the amount of heat 18a, the solidification temperature 36, and the heat transfer coefficient 38 of the molding material from the setting device 12, and also receives the surface area 40 of the molded product from the setting device 14. , calculate the required amount of cooling heat 20b per unit time, and divide the amount of heat 18a possessed by the molded product by the required amount of cooling heat 20b per unit time to obtain the required cooling time 20.
a is calculated and output to the timer 22. These can be expressed as the following formula.

式（１）　　・・・演算器１６の計算 射出重量１６ａ　［ｋｇｆ］　＝平均射出ストロク１６
ｂ［ｍ］Ｘスクリュー断面積３０［ｍ２］Ｘ密度３２　
［ｋ　ｇ　ｆ／ｍ３］式（２）・・・演算器１８の計算 熱量１８ａ　［ｋｃａｌ］　＝射出直前の温度４ａ［℃
］Ｘ射出重量１６ａ　［ｋｇｆ］　Ｘ比熱３４［ｋｃａ
ｌ／　（ｋｇｆｘ℃）］ 式（３）・・・演算器２０の計算 単位時間あたりの必要冷却熱量２０ｂ ［ｋｃａｌ／ｈ］＝熱伝達係数３８　［ｋｃａｌ／　（
ｍ２ｘｈｘ℃）］　ｘ表面積４０　［ｍ２］　Ｘ（射出
直前の温度４ａ［’Ｃ］−固化瀧度３６［℃］） 式（４）・・・演算器２０の計算 必要冷却時間２０ａ　［ｈ］　＝熱量１．８　ａ［ｋｃ
ａｌ］−単位時間あたりの必要冷却熱量２０ｂ［ｋｃａ
ｌ／ｈ］ タイマ２２は、上記射出終了信号６ｂを受は取ることに
より貯量計測を開始し、上記必要冷却時間２０ａが経過
すると型開き信号２２ａを出力する。Formula (1) ...Calculated injection weight 16a [kgf] of computing unit 16 = average injection stroke 16
b [m]X Screw cross-sectional area 30 [m2]X Density 32
[kg g f/m3] Formula (2)...Calculated amount of heat 18a [kcal] by computing unit 18 = Temperature 4a [°C] just before injection
]X injection weight 16a [kgf] X specific heat 34[kca
l/ (kgfx°C)] Equation (3)... Required amount of cooling heat per calculation unit time of the calculator 20 20b [kcal/h] = Heat transfer coefficient 38 [kcal/ (
m2xhx°C)] x surface area 40 [m2] Calorific value 1.8 a[kc
al] - required amount of cooling heat per unit time 20b [kca
l/h] The timer 22 starts measuring the stored amount by receiving the injection end signal 6b, and outputs the mold opening signal 22a when the required cooling time 20a has elapsed.

次に第３及び４図に本発明の第２実施例を示す。これの
第１実施例と異なる部分を下記に説明する。流体圧シリ
ンダ５４のロッド５４ａにはラック２゛か取り付けられ
ており、射出成形機の固定部に設けられた位置センサ２
は、ラック２の第３図中左右方向の移動に応じて回転し
、位置信号２ａを出力することが可能である。制御器８
゛には、切換器１０．演算器１６゛　・１８・２０、設
定器１２°　・１４、及びタイマ２２が設けられている
。切換器１０は、射出成形機からの射出開始信号６ａの
入力があった場合の位置センサ２からの位置信号２ａを
射出開始位置測定信号１０ａとして出力し、また射出終
了信号６ｂの人力があった場合の位置センサ２からの位
置信号２ａを射出終了位置測定信号１０ｂとして出力す
るように切り換え動作をすることが可能である。Next, FIGS. 3 and 4 show a second embodiment of the present invention. The different parts from the first embodiment will be explained below. A rack 2' is attached to the rod 54a of the fluid pressure cylinder 54, and a position sensor 2 is attached to the fixed part of the injection molding machine.
is capable of rotating in accordance with the movement of the rack 2 in the left-right direction in FIG. 3, and outputting a position signal 2a. Controller 8
゛, there is a switch 10. Arithmetic units 16°, 18, 20, setters 12°, 14, and a timer 22 are provided. The switching device 10 outputs the position signal 2a from the position sensor 2 as the injection start position measurement signal 10a when the injection start signal 6a from the injection molding machine is input, and also outputs the injection end signal 6b manually. It is possible to perform a switching operation so that the position signal 2a from the position sensor 2 in the case of the injection end position measurement signal 10b is outputted as the injection end position measurement signal 10b.

設定器１２゛には、あらかじめ射出成形機バレル内径部
の断面積３０、成形材料の密度３２・比熱３４・固化温
度３６及び熱伝達係数３８を設定可能である。演算器１
６・１８・２０は、上記測定信号１．　Ｏａ・１０ｂ・
４ａを受は取る一方、上記設定信号３０・３２・３４・
３６・３８・４０を受は取って、必要な演算を行うこと
が可能である。The cross-sectional area 30 of the inner diameter portion of the barrel of the injection molding machine, the density 32, specific heat 34, solidification temperature 36, and heat transfer coefficient 38 of the molding material can be set in advance in the setting device 12'. Arithmetic unit 1
6, 18, and 20 are the measurement signals 1. Oa・10b・
4a, while the above setting signals 30, 32, 34,
It is possible to take 36, 38, and 40 and perform the necessary calculations.

以下、この第２実施例の作動を説明する。切換器１０は
、射出開始信号６ａの入力があった場合の位置センサ２
からの信号２ａを射出開始位置測定信号１０ａとして演
算器１６°に出力し、また、射出終了信号６ｂの入力が
あった場合の位置センサ２からの信号２ａを射出終了位
置測定信号１０ｂとして演算器１６°に出力するように
切り換え動作を行う。設定器１２゛には、成形材料６０
に関する情報として、あらかじめ射出成形機バレル内径
部の断面積３０．成形材料の、密度３２・比熱３４・固
化温度３６及び熱伝達係数３８が設定されている。また
、設定器１４には、成形品に関する情報として、あらか
じめ成形品の表面積４０が設定されている。演算器１６
゛は、切換器１０から射出開始位置測定信号１０ａ及び
射出終了位置測定信号１０ｂを受は取ると共に、設定器
１２°から射出成形機バレル内径部の断面積３０及び成
形材料の密度３２を受は取り、射出ストローク１６ｂ’
を求め、射出された材料の重量１６ａを演算して演算器
１８に出力する。演算器１８は、射出開始信号６ａの入
力を受けたときの温度センサ４からの信号を、成形材料
の射出直前の温度測定信号４ａとして受は取る一方、設
定器１２゛から比熱３４を受は取って、成形品の有する
熱量１８ａを演算して演算器２０に出力する。演算器２
０は、設定器１２゛から成形材料の、上記射出直前の温
度４ａ・熱量１８ａ・固化温度３６及び熱伝達係数３８
を受は取る一方、設定器１４から成形品の表面積４０を
受取り、単位時間あたりの必要冷却熱量２０ｂを演算し
、成形品の有する熱量１８ａを単位時間あたりの必要冷
却熱量２０ｂで除して必要冷却時間２０ａを演算し、こ
れをタイマ２２に出力する。これらのうち第１実施例と
異なる部分の式は次のようになる。The operation of this second embodiment will be explained below. The switch 10 switches the position sensor 2 when the injection start signal 6a is input.
The signal 2a from the position sensor 2 is output as the injection start position measurement signal 10a to the computing unit 16°, and the signal 2a from the position sensor 2 when the injection end signal 6b is input is output as the injection end position measurement signal 10b to the computing unit. A switching operation is performed to output at 16°. The setting device 12 is filled with molding material 60.
Information regarding the cross-sectional area of the inner diameter part of the barrel of the injection molding machine is 30. The density 32, specific heat 34, solidification temperature 36, and heat transfer coefficient 38 of the molding material are set. Furthermore, the surface area 40 of the molded product is preset in the setting device 14 as information regarding the molded product. Arithmetic unit 16
``receives the injection start position measurement signal 10a and the injection end position measurement signal 10b from the switch 10, and also receives the cross-sectional area 30 of the inner diameter part of the barrel of the injection molding machine and the density 32 of the molding material from the setting device 12°. and injection stroke 16b'
is calculated, and the weight 16a of the injected material is calculated and output to the calculator 18. The computing unit 18 receives the signal from the temperature sensor 4 when receiving the input of the injection start signal 6a as the temperature measurement signal 4a immediately before injection of the molding material, and receives the specific heat 34 from the setting device 12'. The amount of heat 18a possessed by the molded product is calculated and output to the calculator 20. Arithmetic unit 2
0 is the temperature 4a, the amount of heat 18a, the solidification temperature 36, and the heat transfer coefficient 38 of the molding material immediately before the injection from the setting device 12.
On the other hand, it receives the surface area 40 of the molded product from the setting device 14, calculates the required amount of cooling heat 20b per unit time, and divides the amount of heat 18a possessed by the molded product by the required amount of cooling heat 20b per unit time. The cooling time 20a is calculated and outputted to the timer 22. Among these, the equations that differ from the first embodiment are as follows.

式（１′）・・・演算器１６’の計算 射出重量１６ａ　［ｋｇｆ］　＝　（射出終了スクリュ
ー位置１０ｂ［ｍ］−射出開始スクリュー位置１０ａ［
ｍ］）ｘスクリュー断面積３０［ｍ２］Ｘ密度３２　［
ｋ　ｇ　ｆ／ｍ３］タイマ２２は、上記射出終了信号６
ｂを受は取ることにより時間計測を開始し、上記必要冷
却時間２０ａが経過すると型開き信号２２ａを出力する
。Equation (1')... Calculated injection weight 16a [kgf] by computing unit 16' = (injection end screw position 10b [m] - injection start screw position 10a [
m]) x Screw cross-sectional area 30 [m2] x Density 32 [
kg f/m3] timer 22 receives the injection end signal 6.
Time measurement is started by taking b, and when the above-mentioned required cooling time 20a has elapsed, a mold opening signal 22a is output.

（ト）発明の詳細 な説明してきたように、本発明によると、成形品が固化
すると同時に金型を開くことが可能になるので、成形効
率が向上する。(G) As described in detail, according to the present invention, the mold can be opened at the same time as the molded product solidifies, so that molding efficiency is improved.

【図面の簡単な説明】 第１図は本発明の第１実施例を説明する図、第２図はそ
の制御器のブロック図、第３図は本発明　０ の第２実施例を説明する図、第２図はその制御器のブロ
ック図である。 ２・・・位置センサ、４・・・温度センサ、４ａ・・・
　（成形材料の射出直前の）温度測定信号、６ａ・・・
射出開始信号、６ｂ・・・射出終了信号、８，８゛　・
・・制御器、１０・・・切換器、１０ａ・・・射出開始
位置測定信号、ｉｏｂ・・・射出終了位置測定信号、１
２．１２１４・・・設定器、１６．１６’　、１８．２
０・・・演算器、１６ａ・・・成形品の重量、１６ｂ・
・・射出ストローク、１６ｂ°　・・・平均射出ストロ
ーク、１８ａ・・・成形品の有する熱量、２０ａ・・・
必要冷却時間、２０ｂ・・・必要冷却熱量、２２・・・
タイマ、２２ａ・・・型開き信号、３０・・・バレル内
径部断面積、３２・・・　（成形材料の）密度、３４・
・・　（成形材料の）比熱、３６・・・　（成形材料の
）固化温度、３８・・・　（成形材料の）熱伝達係数、
４０・・・成形品の表面積、５０・・・バレル、５２・
・・スクリュ 手続補正書（方式）[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram explaining the first embodiment of the present invention, FIG. 2 is a block diagram of the controller, and FIG. 3 is a diagram explaining the second embodiment of the present invention. , FIG. 2 is a block diagram of the controller. 2...Position sensor, 4...Temperature sensor, 4a...
Temperature measurement signal (just before injection of molding material), 6a...
Injection start signal, 6b... Injection end signal, 8,8゛・
...Controller, 10...Switcher, 10a...Injection start position measurement signal, iob...Injection end position measurement signal, 1
2.1214...Setter, 16.16', 18.2
0... Arithmetic unit, 16a... Weight of molded product, 16b.
...Injection stroke, 16b° ...Average injection stroke, 18a...Amount of heat possessed by the molded product, 20a...
Required cooling time, 20b... Required cooling heat amount, 22...
Timer, 22a... Mold opening signal, 30... Barrel inner diameter cross-sectional area, 32... Density (of molding material), 34.
... Specific heat (of the molding material), 36... Solidification temperature (of the molding material), 38... Heat transfer coefficient (of the molding material),
40...Surface area of molded product, 50...Barrel, 52...
・Screw procedure amendment (method)

Claims (1)

【特許請求の範囲】 １、成形材料の比熱（３４）・固化温度（３６）・熱伝
達係数（３８）と、成形品の重量（１６ａ）・表面積（
４０）と、成形材料の射出温度（４ａ）と、から成形品
の必要冷却時間（２０ａ）を求め、射出完了から上記必
要冷却時間（２０ａ）が経過したとき型開きを行わせる
射出成形機の制御方法。 ２、射出成形機バレル内径部の断面積（３０）と、平均
射出ストローク（１６ｂ）と、成形材料の密度（３２）
・比熱（３４）・固化温度（３６）・熱伝達係数（３８
）と、成形品の表面積（４０）と、をあらかじめ求めて
おき、 射出直前の成形材料の温度（４ａ）を測定し、射出成形
機バレル内径部の断面積（３０）と、平均射出ストロー
ク（１６ｂ）と、成形材料の密度（３２）・比熱（３４
）と、射出直前の成形材料の温度（４ａ）と、から成形
品の有する熱量（１８ａ）を算出し、 成形品の表面積（４０）・熱伝達係数（３８）・固化温
度（３６）と、射出直前の成形材料の温度（４ａ）と、
から単位時間あたりの必要冷却熱量（２０ｂ）を算出し
、 算出された成形品の有する熱量（１８ａ）を、算出され
た単位時間あたりの必要冷却熱量（２０ｂ）で除するこ
とにより、必要冷却時間（２０ａ）を求め、 射出完了から上記必要冷却時間（２０ａ）が経過したと
き型開きを行わせる射出成形機の制御方法。 ３、射出成形機バレル内径部の断面積（３０）、成形材
料の密度（３２）・比熱（３４）・固化温度（３６）・
熱伝達係数（３８）と、成形品の表面積（４０）をあら
かじめ求めておき、 射出ストローク（１６ｂ′）と、射出直前の成形材料の
温度（４ａ）と、を測定し、 射出成形機バレル内径部の断面積（３０）と、成形材料
の密度（３２）・比熱（３４）と、射出ストローク（１
６ｂ′）と、射出直前の成形材料の温度（４ａ）と、か
ら成形品の有する熱量（１８ａ）を算出し、 成形品の表面積（４０）・熱伝達係数（３８）・固化温
度（３６）と、射出直前の成形材料の温度（４ａ）と、
から単位時間あたりの必要冷却熱量（２０ｂ）を算出し
、 算出された成形品の有する熱量（１８ａ）を、算出され
た単位時間あたりの必要冷却熱量（２０ｂ）で除するこ
とにより、必要冷却時間（２０ａ）を求め、 射出完了から上記必要冷却時間（２０ａ）が経過したと
き型開きを行わせる射出成形機の制御方法。 ４、射出成形機のバレル（５０）内の成形材料の温度を
測定して温度信号を出力可能な温度センサ（４）と、制
御器（８）と、を有しており、制御器（８）には、設定
器（１２・１４）、演算器（１６・１８・２０）及びタ
イマ（２２）が設けられており、設定器（１２・１４）
は、あらかじめ射出成形機バレル内径部の断面積（３０
）、平均射出ストローク（１６ｂ）、成形材料の密度（
３２）・比熱（３４）・固化温度（３６）・熱伝達係数
（３８）及び成形品の表面積（４０）を設定可能であり
、演算器（１６・１８・２０）は、上記測定信号（４ａ
）及び上記設定値（１６ｂ・３０・３２・３４・３６・
３８・４０）を用いて必要冷却時間（２０ａ）を算出可
能であり、タイマ（２２）は、射出終了信号（６ｂ）に
よって計時を開始し上記必要冷却時間（２０ａ）を経過
すると型開き信号（２２ａ）を出力するものである射出
成形機の制御装置。 ５、射出成形機のバレル（５０）内のスクリュー（５２
）の位置を測定して位置信号を出力可能な位置センサ（
２）と、バレル（５０）内の成形材料の温度を測定して
温度信号を出力可能な温度センサ（４）と、制御器（８
′）と、を有しており、制御器（８′）には、切換器（
１０）、設定器（１２′・１４）、演算器（１６′・１
８・２０）及びタイマ（２２）が設けられており、切換
器（１０）は、射出成形機からの射出開始信号（６ａ）
を受けたときの位置センサ（２）からの信号を射出開始
位置測定信号（１０ａ）として出力する一方、射出終了
信号（６ｂ）を受けたときの位置センサ（２）からの信
号を射出終了位置測定信号（１０ｂ）として出力するこ
とが可能であり、設定器（１２′・１４）は、あらかじ
め射出成形機バレル内径部の断面積（３０）、成形材料
の密度（３２）・比熱（３４）・固化温度（３６）・熱
伝達係数（３８）及び成形品の表面積（４０）を設定可
能であり、演算器（１６′・１８・２０）は、上記測定
信号（１０ａ・１０ｂ・４ａ）及び上記設定値（３０・
３２・３４・３６・３８・４０）を用いて必要冷却時間
（２０ａ）を算出可能であり、タイマ（２２）は、射出
終了信号（６ｂ）によって計時を開始し上記必要冷却時
間（２０ａ）を経過すると型開き信号（２２ａ）を出力
するものである射出成形機の制御装置。[Claims] 1. The specific heat (34), solidification temperature (36), heat transfer coefficient (38) of the molding material, and the weight (16a) and surface area (
40), the injection temperature of the molding material (4a), and the required cooling time (20a) of the molded product, and the injection molding machine opens the mold when the required cooling time (20a) has elapsed from the completion of injection. Control method. 2. Cross-sectional area of the inner diameter of the injection molding machine barrel (30), average injection stroke (16b), and density of the molding material (32)
・Specific heat (34) ・Solidification temperature (36) ・Heat transfer coefficient (38
) and the surface area (40) of the molded product are determined in advance, the temperature (4a) of the molding material immediately before injection is measured, and the cross-sectional area (30) of the inner diameter of the injection molding machine barrel and the average injection stroke ( 16b), and the density (32) and specific heat (34) of the molding material.
), the temperature of the molding material just before injection (4a), and the amount of heat possessed by the molded product (18a), and then calculate the surface area (40), heat transfer coefficient (38), solidification temperature (36) of the molded product, and The temperature of the molding material just before injection (4a),
Calculate the required cooling heat amount per unit time (20b) from , and divide the calculated heat amount of the molded product (18a) by the calculated required cooling heat amount per unit time (20b) to calculate the required cooling time. A control method for an injection molding machine that calculates (20a) and opens the mold when the required cooling time (20a) has elapsed from the completion of injection. 3. Cross-sectional area of the inner diameter of the injection molding machine barrel (30), density of the molding material (32), specific heat (34), solidification temperature (36),
Determine the heat transfer coefficient (38) and the surface area (40) of the molded product in advance, measure the injection stroke (16b') and the temperature of the molding material just before injection (4a), and calculate the inner diameter of the injection molding machine barrel. The cross-sectional area (30) of the part, the density (32) and specific heat (34) of the molding material, and the injection stroke (1
6b'), the temperature of the molding material just before injection (4a), and the amount of heat the molded product has (18a), and calculate the surface area (40), heat transfer coefficient (38), and solidification temperature (36) of the molded product. and the temperature of the molding material just before injection (4a),
Calculate the required cooling heat amount per unit time (20b) from , and divide the calculated heat amount of the molded product (18a) by the calculated required cooling heat amount per unit time (20b) to calculate the required cooling time. A control method for an injection molding machine that calculates (20a) and opens the mold when the required cooling time (20a) has elapsed from the completion of injection. 4. It has a temperature sensor (4) capable of measuring the temperature of the molding material in the barrel (50) of the injection molding machine and outputting a temperature signal, and a controller (8). ) is provided with a setting device (12, 14), an arithmetic unit (16, 18, 20), and a timer (22), and the setting device (12, 14)
is the cross-sectional area of the inner diameter part of the injection molding machine barrel (30
), average injection stroke (16b), density of molding material (
32), specific heat (34), solidification temperature (36), heat transfer coefficient (38), and surface area of the molded product (40) can be set, and the calculator (16, 18, 20) uses the measurement signal (4a)
) and the above setting values (16b, 30, 32, 34, 36,
38 and 40), the timer (22) starts timing by the injection end signal (6b), and when the required cooling time (20a) has elapsed, the mold opening signal (20a) is calculated. A control device for an injection molding machine that outputs 22a). 5. Screw (52) inside the barrel (50) of the injection molding machine
A position sensor that can measure the position of ( ) and output a position signal
2), a temperature sensor (4) capable of measuring the temperature of the molding material in the barrel (50) and outputting a temperature signal, and a controller (8).
'), and the controller (8') includes a switch (8').
10), setting unit (12'/14), computing unit (16'/1
8 and 20) and a timer (22), and the switch (10) receives the injection start signal (6a) from the injection molding machine.
The signal from the position sensor (2) when the signal is received is output as the injection start position measurement signal (10a), while the signal from the position sensor (2) when the injection end signal (6b) is received is output as the injection end position. It is possible to output it as a measurement signal (10b), and the setting devices (12' and 14) can be used to set the cross-sectional area (30) of the inner diameter of the injection molding machine barrel, the density (32), and specific heat (34) of the molding material in advance.・The solidification temperature (36), heat transfer coefficient (38), and surface area of the molded product (40) can be set, and the calculators (16', 18, 20) can calculate the above measurement signals (10a, 10b, 4a) and The above setting value (30・
32, 34, 36, 38, 40), the required cooling time (20a) can be calculated using A control device for an injection molding machine that outputs a mold opening signal (22a) when the elapsed time has elapsed.
JP2691790A 1990-02-06 1990-02-06 Method of controlling injection molding machine and apparatus therefor Pending JPH03230929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2691790A JPH03230929A (en) 1990-02-06 1990-02-06 Method of controlling injection molding machine and apparatus therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2691790A JPH03230929A (en) 1990-02-06 1990-02-06 Method of controlling injection molding machine and apparatus therefor

Publications (1)

Publication Number Publication Date
JPH03230929A true JPH03230929A (en) 1991-10-14

Family

ID=12206551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2691790A Pending JPH03230929A (en) 1990-02-06 1990-02-06 Method of controlling injection molding machine and apparatus therefor

Country Status (1)

Country Link
JP (1) JPH03230929A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05111944A (en) * 1991-10-23 1993-05-07 Japan Steel Works Ltd:The Measuring method of resin temperature in injection molding machine and holding pressure control method using the same
WO2006007749A1 (en) * 2004-07-21 2006-01-26 Kistler Holding Ag Temperature-dependent demolding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05111944A (en) * 1991-10-23 1993-05-07 Japan Steel Works Ltd:The Measuring method of resin temperature in injection molding machine and holding pressure control method using the same
WO2006007749A1 (en) * 2004-07-21 2006-01-26 Kistler Holding Ag Temperature-dependent demolding

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