JPH0698652B2 - Mold temperature control method - Google Patents
Mold temperature control methodInfo
- Publication number
- JPH0698652B2 JPH0698652B2 JP1078918A JP7891889A JPH0698652B2 JP H0698652 B2 JPH0698652 B2 JP H0698652B2 JP 1078918 A JP1078918 A JP 1078918A JP 7891889 A JP7891889 A JP 7891889A JP H0698652 B2 JPH0698652 B2 JP H0698652B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- mold
- medium
- time
- controller
- 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 - Fee Related
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- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
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における金型温度の調節に係り、特
に成形機からの信号により、金型温度調節機の温度設定
を、一定値ではなく段階的に変化させることにより、金
型温度上昇を円滑に行わせ、且つ最終金型温度に達する
までの時間を短縮することに係るものである。Description: TECHNICAL FIELD The present invention relates to adjustment of mold temperature in an injection molding machine, and in particular, a signal from the molding machine can be used to set the temperature of the mold temperature controller at a constant value. The present invention relates to smoothly increasing the temperature of the mold and shortening the time required to reach the final mold temperature by gradually changing the temperature without stepwise change.
ある金型、ある樹脂材料で連続自動成形を行うとき、高
品質の成形品が安定して出来、且つ冷却時間を最短にす
るように、金型温度調節機(以下温調機という)を使用
して金型温度調節を行っている。When performing continuous automatic molding with a certain mold and a certain resin material, a mold temperature controller (hereinafter referred to as temperature controller) is used so that a high quality molded product can be stably produced and the cooling time is minimized. Then the mold temperature is adjusted.
その際、樹脂材料から金型に持ちこまれる熱流Q1 Cal/H
と、金型から温調機の方へ取り去られる熱流Q2 Cal/Hが
バランスしたところで、最終安定時の金型表面温度(以
下金型温度という)Tiが維持される。At that time, the heat flow from the resin material to the mold Q 1 Cal / H
Then, when the heat flow Q 2 Cal / H removed from the mold toward the temperature controller is balanced, the mold surface temperature (hereinafter referred to as mold temperature) Ti at the final stabilization is maintained.
実際の射出成形に際しては、この安定金型温度Tiは、成
形品を傷つけることなく連続的にエジェクトできる条件
を勘案して、ソフト技術経験から希望値を想定するが、
温調機の循環媒体の温度Tsをはじめ、キャビティに射出
される樹脂温度、ショットサイクル、特に冷却タイムな
どをいろいろに変えて、金型温度が希望値Tiに近づくよ
うに努力するだけであった。At the time of actual injection molding, this stable mold temperature Ti is assumed to be a desired value from software technology experience, considering the condition that it can eject continuously without damaging the molded product.
In addition to the temperature Ts of the circulating medium of the temperature controller, the temperature of the resin injected into the cavity, the shot cycle, especially the cooling time, etc. were variously changed, and all that was required was that the mold temperature approached the desired value Ti. .
そのため、成形開始の初期においては、金型温度が希望
値Tiになっていないので、ヒケ、バリ等の成形不良が出
ていた。成形の現場にあっては加熱シリンダ温度が高温
に昇温するまでに、金型温度も希望値Tiに達しているこ
とが求められていた。Therefore, the mold temperature did not reach the desired value Ti at the beginning of the molding process, resulting in molding defects such as sink marks and burrs. At the molding site, it was required that the mold temperature also reach the desired value Ti by the time the heating cylinder temperature rose to a high temperature.
上記の努力の中で、温調機の媒体設定温度Tsについては
通常次のように処理されている。In the above efforts, the medium set temperature Ts of the temperature controller is usually processed as follows.
温調機のタンクから、圧送ポンプ、送媒口から金型の媒
体通路を経て、返媒口を介して温調機のタンクに戻るま
での媒体回路中での温度低下をTdとすると、Ts=Ti+Td
となる筈である。しかしTdはそう大きい温度差ではない
ので、Ts≒Tiと考えてよいとしていた。Let Td be the temperature drop in the medium circuit from the tank of the temperature controller to the pressure pump, from the medium transfer port to the medium path of the mold, and back to the tank of the temperature controller via the medium return port. = Ti + Td
It should be. However, Td does not have such a large temperature difference that Ts ≈ Ti can be considered.
しかし最初から媒体温度をTs≒Tiに設定して媒体を循環
させたのでは、金型の熱容量なかなり大きいので、金型
表面の最終温度がTiに達するまでにはかなり時間がかか
り、その間の成形品は良品とは言えない不安定なものと
なって、温調機を使用する射出成形の立ち上がり時はな
かなかスムーズにゆかなかった。However, if the medium temperature is set to Ts ≈ Ti from the beginning and the medium is circulated, the heat capacity of the mold is so large that it takes a considerable amount of time for the final temperature of the mold surface to reach Ti. The molded product became unstable and could not be called a good product, and it was not smooth at the start of injection molding using a temperature controller.
そこで、成形現場の智恵として、最初は媒体温度Tsを温
調機で設定できる最高に近い温度に設定しておき、金型
温度Tがある程度上昇してからTs≒Tiに変更設定する程
度のことはある程度は実行されているようである。例え
ば第4図(a)に示す事例は、Ts≒Tiに再設定するのが
遅れた場合で、金型温度はオーバーシュートしてなかな
か安定しない。また第4図(b)に示す事例のように、
Ts≒Tiに変更設定するのが早過ぎた場合は金型温度が希
望のTiに近づくのに極端に時間がかかってしまうなど、
簡単にゆかなかった。Therefore, as a wisdom at the molding site, first set the medium temperature Ts to a temperature close to the maximum that can be set by the temperature controller, and after changing the mold temperature T to some extent, change to Ts ≈ Ti Seems to be running to some extent. For example, in the case shown in FIG. 4 (a), the resetting of Ts≈Ti is delayed, and the mold temperature overshoots and is not stable. Also, as in the case shown in FIG. 4 (b),
If it is too early to change and set Ts≈Ti, it will take an extremely long time for the mold temperature to approach the desired Ti.
It didn't go easily.
前述の問題点を解決するために、請求項(1)では (1)温調機(10)と金型(30)との間に媒体を循環さ
せて所定の温度に金型(30)を調節する金型温度調節方
法において、金型設定温度(Ti)が40〜50℃以下の場
合、この設定温度Tiよりもできるだけ高くした高温(T
s)の媒体を金型に循環させて金型を急速に加熱すると
共に、高温媒体を循環し始めた時点からの金型温度を時
間に対してプロットして金型の昇温速度曲線を得、金型
温度が上記設定温度Tiより3〜5℃低い温度に到達した
時刻(t1)における上記昇温速度曲線の接線と金型の設
定温度Tiとの交点(B)における時刻(t2)を求め、時
刻t1からt2の間に媒体温度がほぼ金型設定温度Tiとなる
ように温調機の媒体温度設定値を降下させ、時刻t2以後
は温調機の媒体温度設定値をほぼ金型の設定温度Tiに合
致させることにより、金型温度を所定温度に最短時間で
昇温、安定させるという技術的手段を採用しており、請
求項(2)では、 温調機(10)と金型(30)との間に媒体を循環させて所
定の温度に金型(30)を調節する金型温度調節方法にお
いて、金型設定温度(Ti)が40〜50℃以上の場合、この
設定温度Tiよりもできるだけ高くした高温(Ts)の媒体
を金型に循環させて金型を急速に加熱すると共に、高温
媒体を循環し始めた時点からの金型温度を時間に対して
プロットして金型の昇温速度曲線を得、金型温度が上記
設定温度Tiより3〜5℃低い温度に到達した時刻(t1)
における上記昇温速度曲線の接線と金型の設定温度Tiと
の交点(B)における時刻(t2)を求め、時刻t1からt2
の間に媒体温度が金型設定温度Tiより10℃程度高くなる
ように温調機の媒体温度設定値を降下させ、時刻t2以後
は温調機の媒体温度設定値を金型設定温度Tiより10℃程
度高い温度に合致させることにより、金型温度を所定温
度に最短時間で昇温、安定させる。In order to solve the above-mentioned problems, in claim (1), (1) the mold (30) is kept at a predetermined temperature by circulating a medium between the temperature controller (10) and the mold (30). In the mold temperature adjustment method to be adjusted, if the mold set temperature (Ti) is 40 to 50 ° C or less, the high temperature (T
The medium in s) is circulated through the mold to rapidly heat the mold, and the mold temperature from the time when the circulation of the high temperature medium is started is plotted against time to obtain the mold heating rate curve. , The time (t 2 ) at the intersection (B) of the tangent to the temperature rising rate curve and the mold set temperature Ti at the time (t 1 ) when the mold temperature reaches a temperature 3 to 5 ° C. lower than the set temperature Ti. ) Is calculated, and the medium temperature set value of the temperature controller is lowered so that the medium temperature becomes approximately the mold set temperature Ti between time t 1 and t 2 , and after time t 2 , the medium temperature setting of the temperature controller is set. By adopting the technical means of raising and stabilizing the mold temperature to a predetermined temperature in the shortest time by making the value substantially match the set temperature Ti of the mold, the temperature controller is claimed in claim (2). In a mold temperature control method, in which a medium is circulated between the mold (30) and the mold (30) to adjust the mold (30) to a predetermined temperature. When the mold set temperature (Ti) is 40 to 50 ° C or higher, the medium of high temperature (Ts) that is higher than the set temperature Ti is circulated through the mold to rapidly heat the mold, The mold temperature from the time when the circulation started was plotted against time to obtain the mold heating rate curve, and the time when the mold temperature reached a temperature 3 to 5 ° C. lower than the set temperature Ti (t 1 )
The time (t 2 ) at the intersection (B) between the tangent line of the temperature rising rate curve and the set temperature Ti of the mold is obtained at time t 1 to t 2
During this period, the medium temperature set value of the temperature controller is lowered so that the medium temperature is about 10 ° C higher than the mold set temperature Ti, and after time t 2 , the medium temperature set value of the temperature controller is set to the mold set temperature Ti. By matching a temperature higher by about 10 ° C., the mold temperature is raised to a predetermined temperature and stabilized in the shortest time.
;という技術的手段を採用している。Is adopted as a technical means.
〔作用〕 ある金型、ある樹脂材料で、手動成形トライが終わ
り、連続自動成形に入る前に、連続自動成形のための成
形条件を制御装置の設定器から設定するとともに、金型
温度Tiも設定する。[Operation] Before the manual molding trial is completed and the continuous automatic molding is started with a certain mold and a certain resin material, the molding conditions for the continuous automatic molding are set from the setting device of the controller, and the mold temperature Ti is also set. Set.
自動成形をスタートさせようとする時に、温調機媒体
の設定温度Tsを、例えばTs≒1.5×Tiのように、その温
調機で実現しうる最高に近い媒体温度に設定し、急速に
金型温度を引き上げる。When attempting to start automatic molding, set the temperature controller medium set temperature Ts to a medium temperature close to the maximum temperature that can be realized by the temperature controller, such as Ts ≈ 1.5 × Ti, and rapidly set the temperature. Raise mold temperature.
上昇しつつある金型温度Tを温度センサで実測して制
御装置に入力し、△T=Ti−Tを演算し、△Tが小さく
なってゆくのを金型温度の上昇として捉える。The rising mold temperature T is measured by a temperature sensor, input to the control device, ΔT = Ti-T is calculated, and the decrease of ΔT is regarded as the increase of the mold temperature.
△Tが例えば3〜5℃くらいに小さくなった時点をt1
時点とし、t1時点から以後は温調機媒体の設定温度Tsを
降下させてゆく。The time when ΔT becomes small, for example, 3 to 5 ° C, is t 1
And time, thereafter from time point t 1 is Yuku by lowering the set temperature Ts of the temperature controller medium.
その方法は、実施例に詳しく述べるが、成形樹脂の種
類により、希望の金型温度Tiが例えば40〜50℃以下か以
上かによって、金型からの放熱量がかなり違うので、そ
れを考慮に入れて、温調機媒体の設定温度Tsをどこまで
降下させるかを演算し、演算されたTsの降下目標温度に
達した後は、Tsはその降下目標温度を維持してゆくよう
にする。The method will be described in detail in Examples, but the heat radiation amount from the mold is considerably different depending on the desired mold temperature Ti, for example, 40 to 50 ° C. or higher, depending on the type of molding resin. After that, the set temperature Ts of the temperature controller medium is calculated to what extent, and after reaching the calculated drop target temperature of Ts, Ts keeps the drop target temperature.
以上の〜のプロセスに従って温調機の設定温度を可
変してゆくことを、射出成形本機のマイコン方式制御盤
で行うのが本発明の特徴である。It is a feature of the present invention that the microcomputer type control panel of the injection molding machine is used to vary the set temperature of the temperature controller according to the above processes (1) to (3).
本発明の実施例を図とともに説明する。 An embodiment of the present invention will be described with reference to the drawings.
第1図において、(10)は金型温度調節機、(30)は金
型、(40)は射出成形機である。In FIG. 1, (10) is a mold temperature controller, (30) is a mold, and (40) is an injection molding machine.
(10)の金型温度調節機で、(11)は熱媒体のタンク、
所謂水循環機のオープンタンク方式でもよいが最近のエ
ンジニアリング樹脂の要求に応えて金型温度Tiを例えば
130℃くらいまで上げられるように、密閉容器方式の加
熱水循環型とした方がよい。(12)はタンク内の媒体を
加熱するヒータ装置、(13)はタンク内の媒体を冷却す
る冷却用蛇管、(14),(15)は冷却媒体のオン・オフ
弁、(16)は上記加熱冷却の制御を行う制御装置、(1
7)はタンク(11)内の媒体温度を測定する温度セン
サ、(18)は媒体を金型に送出するポンプ、(19)は送
媒口開閉用弁、(20)は返媒口開閉用弁、(21)は送媒
口からキャビティへ媒体を送出する圧力を調整するため
の調整弁である。金型(30)は、固定側の雌金型(3
1)、移動側の雄金型(32)、溶融樹脂が注入されるキ
ャビティ(33)から成り、キャビティの温度を測定する
温度センサ(34)が装着されており、その信号出力は成
形機のマイコン方式制御装置(44)に接続されている。
(40)の射出成形機で、(41)は加熱シリンダ、(42)
はノズル、(43)はプラスチック樹脂を供給するホッパ
である。ノズル(42)から、金型キャビティ(33)内に
最適に加熱混練された溶融樹脂を射出する。(44)は射
出成形機及び金型温度調節機の全システムを制御するマ
イコン方式の制御装置で、公知のように、CPU(44a)、
入力装置(44b)、出力装置(44c)、ROMメモリ(44
d)、RAMメモリ(44e)、全システムの成形条件をデジ
タル入力するテンキー装置(44f)及び入力された成形
条件や、上述したタンク内媒体温度センサ(17)、金型
キャビティ温度センサ(34)による測定値を見易く表示
する表示装置(44g)から成っている。(10) Mold temperature controller, (11) Heat medium tank,
A so-called water circulator open tank system may be used, but in response to the recent demand for engineering resin, the mold temperature Ti is set to, for example,
It is better to use a closed container type heated water circulation type so that the temperature can be raised to about 130 ° C. (12) is a heater device for heating the medium in the tank, (13) is a cooling coil for cooling the medium in the tank, (14) and (15) are on / off valves for the cooling medium, and (16) is the above Control device that controls heating and cooling, (1
7) is a temperature sensor for measuring the medium temperature in the tank (11), (18) is a pump for sending the medium to the mold, (19) is a valve for opening / closing the medium feeding port, and (20) is for opening / closing the medium returning port. The valve (21) is an adjusting valve for adjusting the pressure for sending the medium from the medium feeding port to the cavity. The mold (30) is a female mold (3
1), a male die (32) on the moving side, a cavity (33) into which molten resin is injected, and a temperature sensor (34) for measuring the temperature of the cavity is mounted, and its signal output is from the molding machine. It is connected to the microcomputer control device (44).
(40) injection molding machine, (41) heating cylinder, (42)
Is a nozzle, and (43) is a hopper for supplying plastic resin. From the nozzle (42), the molten resin optimally heated and kneaded is injected into the mold cavity (33). (44) is a microcomputer type control device for controlling the entire system of the injection molding machine and the mold temperature controller. As is well known, the CPU (44a),
Input device (44b), output device (44c), ROM memory (44
d), RAM memory (44e), numeric keypad device (44f) that digitally inputs the molding conditions of the entire system, the inputted molding conditions, the above-mentioned tank medium temperature sensor (17), mold cavity temperature sensor (34) It is composed of a display device (44g) that displays the measured value by the.
マイコン方式制御盤(44)の入力装置(44b)には金型
温調機(10)のタンク内媒体の温度センサ(17)からの
電気信号が制御装置(16)を介して入力され、また金型
(32)のキャビティの温度センサ(34)からの電気信号
も入力される。出力装置(44c)からは、射出成形機各
部の作動のための電気信号を出すとともに、金型温調機
(10)の制御装置(16)を介して、熱媒体のタンク(1
1)の設定温度Tsを可変にしたり、タンク内の媒体を加
熱するヒータ装置(12)や、タンク内の媒体を冷却する
冷却用蛇管(13)に媒体を送ったり止めたりするため
の、冷却媒体のオン,オフ弁(14),(15)の作動のた
めの電気信号を出す。An electric signal from the temperature sensor (17) of the medium in the tank of the mold temperature controller (10) is input to the input device (44b) of the microcomputer type control panel (44) via the control device (16), and An electric signal from the temperature sensor (34) of the cavity of the mold (32) is also input. The output device (44c) outputs an electric signal for operating each part of the injection molding machine, and the heat medium tank (1) via the control device (16) of the mold temperature controller (10).
Cooling for changing the set temperature Ts of 1), sending or stopping the medium to the heater device (12) that heats the medium in the tank, or the cooling spiral tube (13) that cools the medium in the tank. An electric signal is output to activate the medium on / off valves (14) and (15).
上記のように構成した金型温度調節機、金型、射出成形
運転のシステムにおいて、その作用を説明する。The operation of the mold temperature controller, the mold, and the injection molding operation system configured as described above will be described.
ある金型、ある樹脂材料で、手動成形トライが終わり
連続自動成形機に入る前に、連続自動成形のための射出
圧力、射出速度、チャージ量、保圧切替位置、型開位
置、エジェクトストローク、冷却タイム、中間タイムな
どの成形条件と共に、最終の希望金型温度Tiも、射出成
形機(40)の制御装置(44)の設定器から設定する。そ
してそれらすべての成形条件を制御装置(44)の表示装
置(44g)で確認した上、RAMメモリ(44d)に入力す
る。Before a continuous automatic molding machine finishes with a certain mold and a certain resin material, the injection pressure, injection speed, charge amount, holding pressure switching position, mold opening position, eject stroke for continuous automatic molding, The final desired mold temperature Ti is set from the setting device of the control device (44) of the injection molding machine (40) together with molding conditions such as cooling time and intermediate time. Then, after confirming all of the molding conditions on the display device (44g) of the control device (44), they are input to the RAM memory (44d).
自動成形をスタートさせると同時に、温調機媒体の設
定温度Tsを、例えばTs≒1.5×Tiのように、その温調機
で実現しうる最高に近い媒体温度に設定し、急速に金型
温度を引き上げる。At the same time as starting the automatic molding, set the temperature Ts of the temperature controller medium to the medium temperature that is close to the maximum temperature that can be realized by the temperature controller, such as Ts ≈ 1.5 × Ti, and rapidly set the mold temperature. Pull up.
毎ショットごとの一定の工程時(例えば射出開始時)
に、上昇しつつある金型温度Tを金型(30)の温度セン
サ(34)で実測し、射出成形機(40)の制御装置(44)
に入力し、制御装置(44)のCPU(44a)で、△T=Ti−
Tを演算し、△Tが小さくなってゆくのを金型温度Tの
上昇として捉える。During a certain process for each shot (for example, at the start of injection)
In addition, the rising mold temperature T is measured by the temperature sensor (34) of the mold (30), and the control device (44) of the injection molding machine (40).
To the CPU (44a) of the controller (44), and ΔT = Ti-
T is calculated, and ΔT becomes smaller as the mold temperature T rises.
そして△Tが例えば3〜5℃くらいに小さくなった時
点をt1時点とし、t1時点から以後は温調機媒体の媒体設
定温度Tsを降下させてゆく。The △ T is the time when decreased to about e.g. 3 to 5 ° C. and t 1 point, thereafter from time point t 1 is Yuku is lowered to the medium setting temperature Ts of the temperature controller medium.
その方法は、第3図において、t1時点から垂直線を上
げて媒体の初期設定値Tsラインとの交点をAとし、また
t1時点における金型温度Tの上昇線を直線的に延長して
(即ち、金型の昇温速度曲線の接線)、金型設定温度Ti
ラインと交わる点をBとし、その時点をt2とする。The method is as shown in FIG. 3, in which the vertical line is raised from the time point t 1 and the intersection point with the initial set value Ts line of the medium is A, and
The rising line of the mold temperature T at time t 1 is extended linearly (that is, the tangent line of the mold heating rate curve) to set the mold set temperature Ti.
The point that intersects the line is B, and the time point is t 2 .
このA点からB点の方に向かって媒体温度設定値Tsを
下げてゆくのであるが、ここで成形に使用している樹脂
の種類によって少し方法を異にする。金型設定温度Ti
は、ポリスチレン、ポリエチレン、ポリプロピレンなど
の汎用樹脂の場合は40〜50℃でよいが、アクリル樹脂で
は約80℃、更にポリカーボネートやPOMなどのエンジニ
アリング樹脂になると、100℃以上にすることもあり、T
iが40〜50℃以上になる場合は、金型表面からの放熱量
が大きくなるので、媒体の最終設定温度Tsにも例えば10
℃程度の差をつけてやらなければならない。The medium temperature set value Ts is lowered from point A toward point B, but the method is slightly different depending on the type of resin used for molding. Mold setting temperature Ti
For general-purpose resins such as polystyrene, polyethylene, and polypropylene, it may be 40 to 50 ° C, but for acrylic resins it is about 80 ° C, and for engineering resins such as polycarbonate and POM, it may be 100 ° C or higher.
When i is 40 to 50 ° C or higher, the amount of heat radiated from the mold surface becomes large, so the final set temperature Ts of the medium is, for example, 10
You have to make a difference of about ℃.
従って汎用樹脂で金型設定温度Ti=40〜50のときは、Ts
≒TiになるようにA点からB点に向けて媒体温度設定値
Tsの設定を下げてゆき、B点に達したら、Ts≒Ti一定と
する。Therefore, when the mold set temperature Ti = 40 to 50 with general-purpose resin, Ts
Medium temperature set value from point A to point B so that ≈Ti
Decrease the setting of Ts, and when point B is reached, set Ts ≈ Ti constant.
しかしエンジニアリング樹脂のように、Ti>40〜50℃の
ときは、t2時点においてB点より約10℃程度高いB′点
に向かって、A点→B′点へと下げてゆき、B′点に達
したら、Ts=Ti+10℃で一定にする。However, as in engineering resin, when Ti> 40 to 50 ° C, it is lowered from point A to point B ′ toward point B ′, which is about 10 ° C higher than point B at time t 2 , and then B ′. Once the point is reached, keep Ts = Ti + 10 ° C constant.
以上の記述で、例えば温度値は、これに捕われるもので
はないことは勿論である。また成形機側から温調機への
設定に際して、温調機のヒータオン時間をカレンダータ
イマなどで曜日によって可変に設定しておくこともでき
る。また逆に温調機側の制御で、設定温度Tsが制御範囲
を超えて異常になったときなどの警報信号を成形機に送
って成形機を停止させるなどの対応措置をとることもで
きる。In the above description, it goes without saying that, for example, the temperature value is not captured by this. Further, when setting the temperature controller from the molding machine side, the heater on time of the temperature controller can be variably set depending on the day of the week by a calendar timer or the like. On the contrary, by controlling the temperature controller, it is possible to take a countermeasure such as sending an alarm signal to the molding machine when the set temperature Ts exceeds the control range and becomes abnormal to stop the molding machine.
本発明は叙上のように、温調機と金型との間に媒体を循
環させて所定の温度に金型を調節する金型温度調節方法
において、金型温度が所定の温度に到達する直前迄媒体
の温度を出来るだけ高くして金型を急速に加熱し、然る
後、金型温度が所定の温度に達する直前において金型の
昇温速度曲線の接線と金型の設定温度との交点を求めて
この交点近傍に向けて媒体温度設定値を降下させるの
で、金型温度が所定温度に最短時間で昇温,安定させる
事が出来、その結果従来のように、 成形開始時には作業者が種々の操作を行う必要がなく
なり、金型温度調節には気を使うことなく、自動化のた
めの細かい調整などに専念することができ、作業効率が
よくなるという利点があり、従って、 自動成形開始時に付きもののように思われていた成形
不良を格段に少なくすることができるという利点があ
る。更に、 温調機のヒータON時間をカレンダータイマなどで設定
しておくことにより、朝始業と同時に良品成形を行うこ
とができるものであり、加えて、 マイコン制御の成形機側から、金型、温度調節機に対
して、演算を含む制御を行い、自動成形開始時に、最短
時間で最適金型温度にスムーズに達するようにする事も
出来る。As described above, the present invention provides a mold temperature adjusting method in which a medium is circulated between a temperature controller and a mold to adjust the mold to a predetermined temperature, and the mold temperature reaches a predetermined temperature. Immediately before the temperature of the medium is raised as much as possible to rapidly heat the mold, and then, immediately before the mold temperature reaches a predetermined temperature, the tangent line of the mold heating rate curve and the set temperature of the mold are Since the media temperature set value is lowered toward the intersection and the mold temperature can be raised to a predetermined temperature and stabilized in the shortest time, as a result, the work can be performed at the start of molding as in the past. There is no need for a person to perform various operations, and there is the advantage that work efficiency can be improved because the mold temperature adjustment can be done without much care, and fine adjustment for automation can be dedicated. Molding defects that seemed like things to start with There is the advantage that it is possible to significantly less. Furthermore, by setting the heater ON time of the temperature controller with a calendar timer, etc., it is possible to perform good product molding at the same time as the start of work in the morning. It is also possible to control the temperature controller including calculation so that the optimum mold temperature can be smoothly reached in the shortest time at the start of automatic molding.
第1図〜第3図は本発明の一実施例を示すもので、第1
図は金型温度調節機,金型,射出成形機全体の構成を示
す説明図、第2図は作用を説明するフローチャート、第
3図は金型温度の推移を説明する線図で、横軸は時間、
縦軸は温度である。 第4−a図、第4−b図は、本発明を使用しない時の金
型温度の推移を説明する線図である。 (10)……金型温度調節機、(11)……タンク、 (12)……ヒータ装置、(13)……冷却用蛇管、 (14)……オン,オフ弁、(15)……オン,オフ弁、 (16)……制御装置、(17)……温度センサ、 (18)……ポンプ、(19)……送媒口開閉用弁、 (20)……返媒口開閉用弁、(21)……調整弁、 (30)……金型、(31)……雌金型、 (32)……雄金型、(33)……キャビティ、 (34)……温度センサ、(40)……射出成形機、 (41)……加熱シリンダ、(42)……ノズル、 (43)……ホッパ、(44)……マイコン方式制御装置、 (44a)……CPU、(44b)……入力装置、 (44c)……出力装置、(44d)……ROMメモリ、 (44e)……RAMメモリ、(44f)……テンキー装置、 (Ti)……金型設定温度、(Ts)……媒体温度設定値。1 to 3 show an embodiment of the present invention.
The figure is an explanatory view showing the structure of the mold temperature controller, the mold, and the injection molding machine as a whole, FIG. 2 is a flow chart for explaining the operation, and FIG. 3 is a diagram for explaining the transition of the mold temperature. Is time,
The vertical axis represents temperature. FIGS. 4-a and 4-b are diagrams for explaining the transition of the mold temperature when the present invention is not used. (10) …… mold temperature controller, (11) …… tank, (12) …… heater device, (13) …… cooling coil, (14) …… on / off valve, (15) …… ON / OFF valve, (16) …… Control device, (17) …… Temperature sensor, (18) …… Pump, (19) …… Valve for opening / closing medium feed port, (20) …… For opening / closing medium return port Valve, (21) …… Control valve, (30) …… Mold, (31) …… Female mold, (32) …… Male mold, (33) …… Cavity, (34) …… Temperature sensor , (40) …… Injection molding machine, (41) …… Heating cylinder, (42) …… Nozzle, (43) …… Hopper, (44) …… Microcomputer type controller, (44a) …… CPU, ( 44b) …… input device, (44c) …… output device, (44d) …… ROM memory, (44e) …… RAM memory, (44f) …… numeric keypad device, (Ti) …… mold set temperature, ( Ts) ... Medium temperature setting value.
Claims (2)
定の温度に金型を調節する金型温度調節方法において、 金型設定温度(Ti)が40〜50℃以下の場合、この設定温
度Tiよりもできるだけ高くした高温(Ts)の媒体を金型
に循環させて金型を急速に加熱すると共に、高温媒体を
循環し始めた時点からの金型温度を時間に対してプロッ
トして金型の昇温速度曲線を得、金型温度が上記設定温
度Tiより3〜5℃低い温度に到達した時刻(t1)におけ
る上記昇温速度曲線の接線と金型の設定温度Tiとの交点
(B)における時刻(t2)を求め、時刻t1からt2の間に
媒体温度がほぼ金型設定温度Tiとなるように温調機の媒
体温度設定値を降下させ、時刻t2以後は温調機の媒体温
度設定値をほぼ金型の設定温度Tiに合致させることによ
り、金型温度を所定温度に最短時間で昇温、安定させる
事を特徴とした金型温度調節方法。1. A mold temperature control method for controlling a mold to a predetermined temperature by circulating a medium between a temperature controller and the mold, wherein a mold set temperature (Ti) is 40 to 50 ° C. or less. In this case, the medium of high temperature (Ts) that is as high as possible higher than the set temperature Ti is circulated in the mold to rapidly heat the mold, and the mold temperature from the time when the circulation of the high temperature medium is started Plot to obtain the mold heating rate curve, and set the mold and the tangent line of the heating rate curve at the time (t 1 ) when the mold temperature reaches a temperature 3 to 5 ° C lower than the set temperature Ti. The time (t 2 ) at the intersection (B) with the temperature Ti is obtained, and the medium temperature set value of the temperature controller is lowered so that the medium temperature becomes almost the mold set temperature Ti between the times t 1 and t 2. by the time t 2 subsequent to meet the set temperature Ti of approximately mold medium temperature setpoint of the temperature controller, the mold temperature predetermined temperature Shortest time at a Atsushi Nobori, stabilized mold temperature control method characterized by causing the.
定の温度に金型を調節する金型温度調節方法において、 金型設定温度(Ti)が40〜50℃以上の場合、この設定温
度Tiよりもできるだけ高くした高温(Ts)の媒体を金型
に循環させて金型を急速に加熱すると共に、高温媒体を
循環し始めた時点からの金型温度を時間に対してプロッ
トして金型の昇温速度曲線を得、金型温度が上記設定温
度Tiより3〜5℃低い温度に到達した時刻(t1)におけ
る上記昇温速度曲線の接線と金型の設定温度Tiとの交点
(B)における時刻(t2)を求め、時刻t1からt2の間に
媒体温度が金型設定温度Tiより10℃程度高くなるように
温調機の媒体温度設定値を降下させ、時刻t2以後は温調
機の媒体温度設定値を金型設定温度Tiより10℃程度高い
温度に合致させることにより、金型温度を所定温度に最
短時間で昇温、安定させる事を特徴とした金型温度調節
方法。2. A mold temperature adjusting method, wherein a medium is circulated between a temperature controller and a mold to adjust the mold to a predetermined temperature, wherein a mold set temperature (Ti) is 40 to 50 ° C. or higher. In this case, the medium of high temperature (Ts) that is as high as possible higher than the set temperature Ti is circulated in the mold to rapidly heat the mold, and the mold temperature from the time when the circulation of the high temperature medium is started Plot to obtain the mold heating rate curve, and set the mold and the tangent line of the heating rate curve at the time (t 1 ) when the mold temperature reaches a temperature 3 to 5 ° C lower than the set temperature Ti. The time (t 2 ) at the intersection (B) with the temperature Ti is calculated, and the medium temperature set value of the temperature controller is set so that the medium temperature is higher than the mold set temperature Ti by about 10 ° C between the times t 1 and t 2. To lower the temperature of the temperature controller to match the medium temperature set value Ti about 10 ° C higher than the mold set temperature Ti after time t 2. Further, a mold temperature adjusting method characterized by raising and stabilizing the mold temperature to a predetermined temperature in the shortest time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1078918A JPH0698652B2 (en) | 1989-03-30 | 1989-03-30 | Mold temperature control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1078918A JPH0698652B2 (en) | 1989-03-30 | 1989-03-30 | Mold temperature control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03187721A JPH03187721A (en) | 1991-08-15 |
JPH0698652B2 true JPH0698652B2 (en) | 1994-12-07 |
Family
ID=13675236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1078918A Expired - Fee Related JPH0698652B2 (en) | 1989-03-30 | 1989-03-30 | Mold temperature control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0698652B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5283431B2 (en) * | 2008-06-05 | 2013-09-04 | 東洋機械金属株式会社 | Molding machine |
JP6560158B2 (en) * | 2016-05-30 | 2019-08-14 | 株式会社松井製作所 | Mold temperature control device and mold temperature control method |
JP7079480B2 (en) * | 2018-05-28 | 2022-06-02 | 株式会社松井製作所 | Mold temperature control device and mold temperature control method |
WO2023184205A1 (en) * | 2022-03-30 | 2023-10-05 | 浙江凯华模具有限公司 | Mold temperature online control method in injection molding process |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62161515A (en) * | 1986-01-13 | 1987-07-17 | Hitachi Ltd | Apparatus for controlling mold temp. |
-
1989
- 1989-03-30 JP JP1078918A patent/JPH0698652B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03187721A (en) | 1991-08-15 |
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