JPH1190965A - Injection molding machine and injection molding method - Google Patents
Injection molding machine and injection molding methodInfo
- Publication number
- JPH1190965A JPH1190965A JP25317997A JP25317997A JPH1190965A JP H1190965 A JPH1190965 A JP H1190965A JP 25317997 A JP25317997 A JP 25317997A JP 25317997 A JP25317997 A JP 25317997A JP H1190965 A JPH1190965 A JP H1190965A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- pressure
- driving body
- mold
- molten resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、射出成形機におけ
る射出駆動体の制御に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of an injection drive in an injection molding machine.
【０００２】[0002]
【従来の技術】従来の射出成形機は、射出シリンダ内の
射出駆動体を射出駆動用の油圧シリンダ装置により駆動
して、射出駆動体の前部の溶融樹脂を射出シリンダ前端
から金型のキャビティー内へ射出充填し、射出充填が完
了した後（キャビティー内が満杯となった後）、溶融樹
脂を冷却固化しつつ射出駆動体を更に押圧して充填樹脂
を保圧し成形するようにしている。2. Description of the Related Art In a conventional injection molding machine, an injection driving body in an injection cylinder is driven by a hydraulic cylinder device for injection driving, and molten resin at a front portion of the injection driving body is moved from a front end of the injection cylinder to a mold cavity. After the injection filling into the tee and the injection filling is completed (after the cavity is filled), the injection driving body is further pressed while cooling and solidifying the molten resin so that the filling resin is held and molded. I have.
【０００３】このような射出成形においては、前記射出
駆動体を射出駆動してキャビティーが満杯となる射出充
填終了時に図４に示すように射出圧が急激に上昇する鋭
いピーク圧が発生し、その直後保圧状態に切り換えてい
る。In such injection molding, a sharp peak pressure is generated at which the injection pressure sharply rises as shown in FIG. 4 at the end of injection filling when the injection driving body is driven to inject the cavity to fill the cavity. Immediately thereafter, the state is switched to the pressure holding state.
【０００４】即ち、高いピーク射出圧が発生すると共
に、射出駆動体は保圧制御に切り換えられ、図４に示す
ようにピーク射出圧より一挙に半値位の射出圧（保圧）
に切り換えられることになる。That is, when a high peak injection pressure is generated, the injection driving body is switched to the holding pressure control, and as shown in FIG. 4, the injection pressure (holding pressure) which is half the peak injection pressure at a stroke.
Will be switched to.
【０００５】そのため、この保圧に切り換えるとき、高
いピーク射出圧による樹脂クッション圧が発生し、射出
駆動体が射出充填終了時にわずかであるが急激に一瞬後
退する現象が生じる。Therefore, when switching to the holding pressure, a resin cushion pressure is generated due to a high peak injection pressure, and a phenomenon occurs in which the injection driving body is slightly but suddenly retracted at the end of injection filling.
【０００６】これは、言い換えると充填後期に発生する
蓄圧された高いクッション圧から低い保圧に切り変わる
ため（減圧されるため）、このクッション圧によって射
出駆動体が押し戻される現象である。In other words, this is a phenomenon in which the injection driving body is pushed back by this cushion pressure because the pressure is switched from the high stored cushion pressure generated in the later stage of filling to the low holding pressure (because the pressure is reduced).
【０００７】しかしながら、従来の射出制御において
は、射出充填や保圧に際して射出駆動体の前進移動の制
御は行っているが、反対方向へ移動する場合には圧力以
外は全く制御されていない。[0007] However, in the conventional injection control, the forward movement of the injection driving body is controlled at the time of injection filling and pressure holding. However, when the injection driving body is moved in the opposite direction, no control other than pressure is performed.
【０００８】即ち、ほとんど常に射出充填から保圧に切
り換わるとき、急激に射出駆動体がわずかに戻され、キ
ャビティー内の充填樹脂も逆流することさえあるが、こ
の射出駆動体の戻り速度や戻り時間（保圧状態となるま
での時間）は制御されていないため、成形ショット毎の
繰り返し精度は不安定なものとなっていた。That is, almost always, when switching from the injection filling to the holding pressure, the injection driving body is suddenly slightly returned, and the filling resin in the cavity may even flow backward. Since the return time (the time until the pressure is maintained) is not controlled, the repetition accuracy for each molding shot has been unstable.
【０００９】このように従来充填後期の保圧切り換え時
の圧力、速度、時間の制御にバラツキを生じるために、
充填量や離型のバラツキに影響し、ショートショットや
バリの発生など品質に大きな影響を与えていた。As described above, since the control of the pressure, the speed, and the time at the time of switching the holding pressure in the latter half of the conventional filling causes variations,
This affected variations in filling amount and mold release, and had a large effect on quality such as short shots and burrs.
【００１０】本発明は、従来の射出制御にこのような問
題が生じていることを見い出し、これを解決するもの
で、積極的に射出駆動体の後退速度を制御することで、
射出駆動体の保圧切り換え時の戻され方のバラツキを抑
制し、充填量を正確に制御して品質の安定化を図れる画
期的な射出成形機並びに射出成形法を提供することを目
的としている。The present invention finds out that such a problem has occurred in the conventional injection control, and solves this problem. By positively controlling the retreat speed of the injection driving body,
An object of the present invention is to provide an epoch-making injection molding machine and an injection molding method capable of suppressing variations in the return of the injection driving body during holding pressure switching, accurately controlling the filling amount, and stabilizing the quality. I have.
【００１１】[0011]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１２】射出シリンダ１内の射出スクリュー若しく
は射出プランジャーなどの射出駆動体２の前部に溶融樹
脂３を送り込み、この前部に送り込んだ溶融樹脂３によ
り後方へ後退した射出駆動体２を前方へ押し出して、前
記溶融樹脂３を射出シリンダ１前端より金型４内へ射出
すると共に更にこの射出駆動体２を前方へ加圧して金型
４内へ送り込んだ樹脂を保圧し得るように構成した射出
成形機において、前記射出駆動体２を射出駆動する射出
駆動用シリンダ装置５のこの射出駆動体２が後方へ移動
するとき流体を排出する流体排出部６に、この射出駆動
体２の後退速度を略一定に保持する絞り弁機構７を設
け、前記射出駆動体２を前記射出駆動用シリンダ装置５
により射出駆動して前記金型４内へ前記溶融樹脂３を射
出した後前記保圧状態に切り換える際、射出圧の減圧に
よる樹脂クッション圧によって後方へ押し戻される射出
駆動体２の後退速度が、前記絞り弁機構７による前記射
出駆動用シリンダ装置５の流体排出部６における流量規
制作用によって、成形サイクル毎常に略一定に保持され
るように構成したことを特徴とする射出成形機に係るも
のである。A molten resin 3 is fed into a front portion of an injection driving body 2 such as an injection screw or an injection plunger in an injection cylinder 1 and the injection driving body 2 retreated backward by the molten resin 3 fed into the front portion is moved forward. The molten resin 3 is injected into the mold 4 from the front end of the injection cylinder 1 and the injection driving body 2 is further pressed forward to maintain the pressure of the resin fed into the mold 4. In the injection molding machine, a retreating speed of the injection driving body 2 is supplied to a fluid discharge unit 6 of the injection driving cylinder device 5 for driving the injection driving body 2 to discharge fluid when the injection driving body 2 moves backward. A throttle valve mechanism 7 for holding the injection driving body 2 substantially constant, and connecting the injection driving body 2 to the injection driving cylinder device 5.
When the molten resin 3 is injected into the mold 4 by the injection driving and the pressure is switched to the pressure holding state, the retreat speed of the injection driving body 2 pushed back by the resin cushion pressure due to the reduction of the injection pressure is set to The present invention relates to an injection molding machine characterized in that the throttle valve mechanism 7 is configured to be kept substantially constant at every molding cycle by a flow rate regulating action at a fluid discharge portion 6 of the injection driving cylinder device 5. .
【００１３】また、射出シリンダ１内の射出スクリュー
若しくは射出プランジャーなどの射出駆動体２の前部に
溶融樹脂３を送り込み、この前部に送り込んだ溶融樹脂
３により後方へ後退した射出駆動体２を前方へ押し出し
て、前方溶融樹脂３を射出シリンダ１前端より金型４内
へ射出すると共に更にこの射出駆動体２を前方へ加圧し
て金型４内へ送り込んだ樹脂を保圧し得るように構成し
た射出成形機において、前記射出駆動体２を射出駆動す
る射出駆動用シリンダ装置５のこの射出駆動体２が後方
へ移動するとき流体を排出する流体排出部６に、この射
出駆動体２の後退速度を略一定に制御し得る流量調整弁
機構８を設け、前記射出駆動体２を前記射出駆動用シリ
ンダ装置５により射出駆動して前記金型４内へ前記溶融
樹脂３を射出した後前記保圧状態に切り換える際、射出
圧の減圧による樹脂クッション圧によって後方へ押し戻
される射出駆動体２の後退速度が、前記流量調整弁機構
８による前記射出駆動用シリンダ装置５の流体排出部６
における流量規制作用によって、成形サイクル毎常に略
一定に保持されるように構成したことを特徴とする請求
項１記載の射出成形機に係るものである。Further, the molten resin 3 is fed into a front portion of an injection driving body 2 such as an injection screw or an injection plunger in the injection cylinder 1 and the injection driving body 2 retreated backward by the molten resin 3 fed into the front portion. So that the front molten resin 3 is injected into the mold 4 from the front end of the injection cylinder 1 and the injection driving body 2 is further pressed forward to maintain the pressure of the resin fed into the mold 4. In the injection molding machine thus configured, the injection drive unit 2 of the injection drive cylinder device 5 that drives the injection drive unit 2 discharges fluid when the injection drive unit 2 moves backward. A flow control valve mechanism 8 capable of controlling the retreat speed to be substantially constant is provided, and the injection driving body 2 is driven by the injection driving cylinder device 5 to inject the molten resin 3 into the mold 4. Wherein when switching the pressure holding state, the retraction rate of the injection driving body 2 is pushed back rearward by a resin cushion pressure by vacuum injection pressure, fluid discharge portion 6 of the injection drive cylinder unit 5 by the flow rate adjusting valve mechanism 8
2. The injection molding machine according to claim 1, wherein the flow rate regulating action in (1) is adapted to be maintained substantially constant at every molding cycle.
【００１４】また、射出シリンダ１内の射出スクリュー
若しくは射出プランジャーなどの射出駆動体２の前部に
溶融樹脂３を送り込み、この前部に送り込んだ溶融樹脂
３により後方へ後退した射出駆動体２を前方へ押し出し
て、前方溶融樹脂３を射出シリンダ１前端より金型４内
へ射出すると共に更にこの射出駆動体２を前方へ加圧し
て金型４内へ送り込んだ樹脂を保圧し得るように構成し
た射出成形機において、前記射出駆動体２を射出駆動す
る射出駆動用シリンダ装置５のこの射出駆動体２が後方
へ移動するとき流体を排出する流体排出部６に、この射
出駆動体２の後退速度を略一定に制御し得る流量調整弁
機構８を設け、前記射出駆動体２を前記射出駆動用シリ
ンダ装置５により射出駆動して前記金型４内へ前記溶融
樹脂３を射出した後前記保圧状態に切り換える際、射出
圧の減圧による樹脂クッション圧によって後方へ押し戻
される射出駆動体２の後退速度が、前記流量調整弁機構
８による前記射出駆動用シリンダ装置５の流体排出部６
における流量規制作用によって、射出充填終了時から保
圧状態までの間段階的に変化するように制御して、成形
サイクル毎常に略一定に保持されるように構成したこと
を特徴とする請求項２記載の射出成形機に係るものであ
る。Further, the molten resin 3 is fed to the front of an injection driver 2 such as an injection screw or an injection plunger in the injection cylinder 1, and the molten resin 3 fed to the front portion causes the injection driver 2 to retreat backward. So that the front molten resin 3 is injected into the mold 4 from the front end of the injection cylinder 1 and the injection driving body 2 is further pressed forward to maintain the pressure of the resin fed into the mold 4. In the injection molding machine thus configured, the injection drive unit 2 of the injection drive cylinder device 5 that drives the injection drive unit 2 discharges fluid when the injection drive unit 2 moves backward. A flow control valve mechanism 8 capable of controlling the retreat speed to be substantially constant is provided, and the injection driving body 2 is driven by the injection driving cylinder device 5 to inject the molten resin 3 into the mold 4. Wherein when switching the pressure holding state, the retraction rate of the injection driving body 2 is pushed back rearward by a resin cushion pressure by vacuum injection pressure, fluid discharge portion 6 of the injection drive cylinder unit 5 by the flow rate adjusting valve mechanism 8
3. The method according to claim 2, wherein the flow rate is controlled so as to change stepwise from the end of the injection filling to the pressure holding state, so that the pressure is kept substantially constant every molding cycle. The present invention relates to the above-described injection molding machine.
【００１５】また、射出シリンダ１内の射出スクリュー
若しくは射出プランジャーなどの射出駆動体２の前部に
溶融樹脂３を送り込み、この前部に送り込んだ溶融樹脂
３により後方へ後退した射出駆動体２を前方へ押し出し
て、前記溶融樹脂３を射出シリンダ１前端より金型４内
へ射出すると共に更にこの射出駆動体２を前方へ加圧し
て金型４内へ送り込んだ樹脂を保圧する射出成形法にお
いて、前記射出駆動体２を射出駆動する射出駆動用シリ
ンダ装置５のこの射出駆動体２が後方へ移動するとき流
体を排出する流体排出部６に、この射出駆動体２の後退
速度を略一定に保持する絞り弁機構７を設け、前記射出
駆動体２を前記射出駆動用シリンダ装置５により射出駆
動して前記金型４内へ前記溶融樹脂３を射出した後前記
保圧状態に切り換える際、射出圧の減圧による樹脂クッ
ション圧によって後方へ押し戻される射出駆動体２の後
退速度を、前記絞り弁機構７による前記射出駆動用シリ
ンダ装置５の流体排出部６における流量規制作用によっ
て、成形サイクル毎常に略一定に保持することを特徴と
する射出成形法に係るものである。Further, the molten resin 3 is fed into a front portion of an injection driving body 2 such as an injection screw or an injection plunger in the injection cylinder 1 and the injection driving body 2 retreated backward by the molten resin 3 fed into the front portion. Injection molding method by extruding the molten resin 3 into the mold 4 from the front end of the injection cylinder 1 and further pressing the injection drive 2 forward to keep the resin fed into the mold 4. In the injection driving cylinder device 5 for driving the injection driving body 2, the retreating speed of the injection driving body 2 is substantially constant by the fluid discharge part 6 for discharging the fluid when the injection driving body 2 moves backward. The injection valve 2 is driven by the injection driving cylinder device 5 to inject the molten resin 3 into the mold 4 and then switched to the pressure holding state. When the injection driving body 2 is pushed backward by the resin cushion pressure due to the reduction of the injection pressure, the retreating speed of the injection driving body 2 is reduced by the flow regulating action of the throttle valve mechanism 7 in the fluid discharge part 6 of the injection driving cylinder device 5. The present invention relates to an injection molding method characterized in that it is kept substantially constant every cycle.
【００１６】また、射出シリンダ１内の射出スクリュー
若しくは射出プランジャーなどの射出駆動体２の前部に
溶融樹脂３を送り込み、この前部に送り込んだ溶融樹脂
３により後方へ後退した射出駆動体２を前方へ押し出し
て、前方溶融樹脂３を射出シリンダ１前端より金型４内
へ射出すると共に更にこの射出駆動体２を前方へ加圧し
て金型４内へ送り込んだ樹脂を保圧する射出成形法にお
いて、前記射出駆動体２を射出駆動する射出駆動用シリ
ンダ装置５のこの射出駆動体２が後方へ移動するとき流
体を排出する流体排出部６に、この射出駆動体２の後退
速度を略一定に制御し得る流量調整弁機構８を設け、前
記射出駆動体２を前記射出駆動用シリンダ装置５により
射出駆動して前記金型４内へ前記溶融樹脂３を射出した
後前記保圧状態に切り換える際、射出圧の減圧による樹
脂クッション圧によって後方へ押し戻される射出駆動体
２の後退速度を、前記流量調整弁機構８による前記射出
駆動用シリンダ装置５の流体排出部６における流量規制
作用によって、成形サイクル毎常に略一定に保持するこ
とを特徴とする請求項４記載の射出成形法に係るもので
ある。Further, the molten resin 3 is fed into a front portion of an injection driving body 2 such as an injection screw or an injection plunger in the injection cylinder 1 and the injection driving body 2 retreated backward by the molten resin 3 fed into the front portion. Injection molding method by extruding the front molten resin 3 into the mold 4 from the front end of the injection cylinder 1 and further pressing the injection drive 2 forward to hold the resin fed into the mold 4. In the injection driving cylinder device 5 for driving the injection driving body 2, the retreating speed of the injection driving body 2 is substantially constant by the fluid discharge part 6 for discharging the fluid when the injection driving body 2 moves backward. The injection driving body 2 is driven to be injected by the injection driving cylinder device 5 to inject the molten resin 3 into the mold 4 and then to the pressure holding state. At the time of replacement, the retreat speed of the injection driving body 2 pushed back by the resin cushion pressure due to the reduction of the injection pressure is controlled by the flow rate regulating action of the flow adjusting valve mechanism 8 at the fluid discharge portion 6 of the injection driving cylinder device 5. The injection molding method according to claim 4, characterized in that the temperature is kept substantially constant every molding cycle.
【００１７】また、射出シリンダ１内の射出スクリュー
若しくは射出プランジャーなどの射出駆動体２の前部に
溶融樹脂３を送り込み、この前部に送り込んだ溶融樹脂
３により後方へ後退した射出駆動体２を前方へ押し出し
て、前方溶融樹脂３を射出シリンダ１前端より金型４内
へ射出すると共に更にこの射出駆動体２を前方へ加圧し
て金型４内へ送り込んだ樹脂を保圧する射出成形法にお
いて、前記射出駆動体２を射出駆動する射出駆動用シリ
ンダ装置５のこの射出駆動体２が後方へ移動するとき流
体を排出する流体排出部６に、この射出駆動体２の後退
速度を略一定に制御し得る流量調整弁機構８を設け、前
記射出駆動体２を前記射出駆動用シリンダ装置５により
射出駆動して前記金型４内へ前記溶融樹脂３を射出した
後前記保圧状態に切り換える際、射出圧の減圧による樹
脂クッション圧によって後方へ押し戻される射出駆動体
２の後退速度を、前記流量調整弁機構８による前記射出
駆動用シリンダ装置５の流体排出部６における流量規制
作用によって、射出充填終了時から保圧状態までの間段
階的に変化するように制御して、成形サイクル毎常に略
一定に保持することを特徴とする請求項５記載の射出成
形法に係るものである。Further, the molten resin 3 is fed into a front portion of an injection driving body 2 such as an injection screw or an injection plunger in the injection cylinder 1 and the injection driving body 2 retreated backward by the molten resin 3 fed into the front portion. Injection molding method by extruding the front molten resin 3 into the mold 4 from the front end of the injection cylinder 1 and further pressing the injection drive 2 forward to hold the resin fed into the mold 4. In the injection driving cylinder device 5 for driving the injection driving body 2, the retreating speed of the injection driving body 2 is substantially constant by the fluid discharge part 6 for discharging the fluid when the injection driving body 2 moves backward. The injection driving body 2 is driven to be injected by the injection driving cylinder device 5 to inject the molten resin 3 into the mold 4 and then to the pressure holding state. At the time of replacement, the retreat speed of the injection driving body 2 pushed back by the resin cushion pressure due to the reduction of the injection pressure is controlled by the flow rate regulating action of the flow adjusting valve mechanism 8 at the fluid discharge portion 6 of the injection driving cylinder device 5. 6. The injection molding method according to claim 5, wherein the injection molding is controlled so as to change stepwise from the end of the injection filling to the pressure-holding state so as to be kept substantially constant at every molding cycle. .
【００１８】[0018]
【発明の実施の形態】好適と考える本発明の実施の形態
（発明をどのように実施するか）を、図面に基づいてそ
の作用効果を示して簡単に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.
【００１９】射出駆動用シリンダ装置５への流体の流入
を制御して射出駆動体２を前方へ押し出し駆動制御し、
射出駆動体２の前部の溶融樹脂３を射出シリンダ１前端
から金型４内のキャビティー９へ射出充填する。The injection drive body 2 is controlled to control the flow of fluid into the injection drive cylinder device 5 to push the injection drive body 2 forward and to perform drive control.
The molten resin 3 at the front of the injection driving body 2 is injected and filled into the cavity 9 in the mold 4 from the front end of the injection cylinder 1.
【００２０】キャビティー９にこの溶融樹脂３が注入さ
れ満杯となる射出充填終了時には、例えば図３，４に示
すようなピーク射出圧が発生し、その直後前記射出駆動
用シリンダ装置５の制御によりやや低い射出圧を保持す
る保圧状態に切り換える。At the end of injection filling when the molten resin 3 is filled into the cavity 9 and becomes full, for example, a peak injection pressure as shown in FIGS. 3 and 4 is generated, and immediately thereafter, under the control of the injection driving cylinder device 5, The state is switched to a pressure holding state in which a slightly lower injection pressure is maintained.
【００２１】このピーク射出圧発生後、低い射出圧の保
圧状態に切り換える際、蓄圧された高いクッション圧か
ら低い保圧に切り換わることで、射出駆動体２は後方へ
押し戻されるが、このとき、射出駆動用シリンダ装置５
の流体排出部６に絞り弁機構７あるいは流量調整弁機構
８が設けられているため、流体排出量が確実に規制され
ることになり、この戻り現象における射出駆動体２の後
退速度が成形サイクル毎に一定に保持されることにより
充填量が一定となる。After the peak injection pressure is generated, when switching to the low injection pressure holding state, the injection driving body 2 is pushed back by switching from the stored high cushion pressure to the low holding pressure. , Injection drive cylinder device 5
Since the throttle valve mechanism 7 or the flow rate adjusting valve mechanism 8 is provided in the fluid discharge portion 6 of this embodiment, the amount of fluid discharge is surely regulated. By being kept constant every time, the filling amount becomes constant.
【００２２】従って、射出駆動体２の後退速度が制御さ
れることにより、保圧切り換え時の射出駆動体２の戻さ
れ方が、何ら制御していない従来例に比べてバラツキが
少なくなり、充填量が一定となり成形条件が安定し高品
質化を図れると共に、品質の安定化を図れることとな
る。Therefore, by controlling the retreat speed of the injection driving body 2, the return of the injection driving body 2 at the time of switching the holding pressure is less scattered than in the conventional example in which no control is performed, and The amount is constant, the molding conditions are stabilized, and high quality can be achieved, and the quality can be stabilized.
【００２３】[0023]
【実施例】本発明の具体的な実施例について図面に基づ
いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.
【００２４】図１に示すように、射出駆動体２（プラン
ジャー）を射出駆動する射出駆動用の油圧シリンダ装置
５のこの射出駆動体２が後方へ移動するとき流体（油）
を排出する流体排出部６に、この射出駆動体２の後退速
度を略一定に保持する絞り弁機構７を設け、前記射出駆
動体２を前記射出駆動用シリンダ装置５により射出駆動
して前記金型４内へ前記溶融樹脂３を射出した後前記保
圧状態に切り換える際、射出圧の減圧による樹脂クッシ
ョン圧によって後方へ押し戻される射出駆動体２の後退
速度が、前記絞り弁機構７による前記射出駆動用シリン
ダ装置５の流体排出部６における流量規制作用によっ
て、成形サイクル毎常に略一定に保持されるように構成
している。As shown in FIG. 1, when the injection drive 2 of the hydraulic cylinder device 5 for injection drive for driving the injection drive 2 (plunger) moves backward, the fluid (oil) is moved.
A throttle valve mechanism 7 for maintaining the retraction speed of the injection driving body 2 substantially constant is provided in a fluid discharge section 6 for discharging the fluid. When switching to the pressure holding state after injecting the molten resin 3 into the mold 4, the retreat speed of the injection driving body 2, which is pushed back by the resin cushion pressure due to the reduction of the injection pressure, corresponds to the injection by the throttle valve mechanism 7. Due to the flow rate regulating action in the fluid discharge portion 6 of the driving cylinder device 5, the fluid is always kept substantially constant in each molding cycle.
【００２５】即ち、図２に示すように、射出充填終了時
のピーク射出圧発生時から保圧状態に切り換わる間、一
定の後退速度で射出駆動体２が後退して減圧して行くよ
うに圧力制御することで、この間の充填量も正確に制御
管理できることになり、充填量を常に一定に保持できる
ことになる。That is, as shown in FIG. 2, during the period from the peak injection pressure generation at the end of injection filling to the switching to the holding pressure state, the injection driving body 2 is retracted at a constant retreat speed to reduce the pressure. By controlling the pressure, the filling amount during this time can also be accurately controlled and managed, and the filling amount can always be kept constant.
【００２６】更に説明すれば、従来においては図４に示
すように、ピーク射出圧から保圧状態まで何ら制御され
ていないままで急激に射出駆動体２が後退して減圧する
ため、この戻り方も一定せず、そのため充填量が一定し
ないという問題が生じるが、本発明においてはこの問題
が解決されることとなる。More specifically, as shown in FIG. 4, since the injection driving body 2 suddenly retreats and decompresses without any control from the peak injection pressure to the holding pressure state as shown in FIG. However, there is a problem that the filling amount is not constant, and the present invention solves this problem.
【００２７】また、射出条件や溶融樹脂３の材質や粘性
などの諸条件に応じて絞り量を調整制御できるように、
前記絞り弁機構７として流量調整弁機構８を設けても良
い。Also, the throttle amount can be adjusted and controlled in accordance with various conditions such as the injection conditions and the material and viscosity of the molten resin 3.
A flow control valve mechanism 8 may be provided as the throttle valve mechanism 7.
【００２８】従って、例えば絞り量を調整できない場
合、射出駆動用シリンダ装置５に油を送り込む場合には
流体排出部６とは別に設けた流体流入部に備えた流入調
整弁機構を制御して射出駆動体２の射出駆動を制御する
ように構成しても良いし、流量調整弁機構８を用いる場
合は、この流量調整弁機構８を流入調整弁機構として射
出駆動制御し、保圧に切り換えするときには射出駆動体
２の後退速度を保持する絞り弁機構７として機能するよ
うに構成していも良い。Therefore, for example, when the throttle amount cannot be adjusted, and when oil is fed into the injection drive cylinder device 5, the inflow adjusting valve mechanism provided in the fluid inflow portion provided separately from the fluid discharge portion 6 is controlled to perform injection. The injection drive of the driving body 2 may be configured to be controlled, or when the flow rate adjustment valve mechanism 8 is used, the flow rate adjustment valve mechanism 8 is used as an inflow adjustment valve mechanism to perform injection drive control and switch to pressure holding. In some cases, the injection drive unit 2 may be configured to function as the throttle valve mechanism 7 for maintaining the retreat speed.
【００２９】また、流量調整弁機構８を用いる場合、図
２に示すように一段階で保圧状態まで圧力降下させず、
図３に示すように例えば三段階に排出流量を調整し段階
的に射出駆動体２の後退速度を調整制御し、成形サイク
ル毎常に射出駆動体２の後退速度を一定に管理すること
で充填量のバラツキを抑えるようにしても良い。この場
合、図３に示すように、遅い・速い・遅いという
ように制御することでより正確にピーク射出圧から保圧
までの間の充填量を正確に管理することができる。When the flow regulating valve mechanism 8 is used, as shown in FIG.
As shown in FIG. 3, for example, the discharge flow rate is adjusted in three stages, the retraction speed of the injection driving body 2 is adjusted and controlled in a stepwise manner, and the retreating speed of the injection driving body 2 is constantly controlled at every molding cycle to thereby control the filling amount. May be suppressed. In this case, as shown in FIG. 3, by performing control such as slow / fast / slow, the filling amount from the peak injection pressure to the holding pressure can be more accurately managed.
【００３０】また、従来射出駆動用シリンダ装置５に流
量調整弁などを設けた構成のものはあったが、本発明の
如く保圧切り換え時に射出駆動体２の後退現象における
射出駆動体２の戻り方のバラツキをおさえることができ
る構成、例えば射出駆動体２の後退速度を一定に制御す
る制御手段を実現できる構成のものはなかった。Although the injection drive cylinder device 5 is conventionally provided with a flow control valve or the like in the injection drive cylinder device 5, the return of the injection drive member 2 due to the retreat phenomenon of the injection drive member 2 at the time of switching the holding pressure as in the present invention. For example, there is no configuration capable of suppressing the variation in the direction, for example, a configuration capable of realizing control means for controlling the retreat speed of the injection driving body 2 to be constant.
【００３１】そのため従来においては、射出駆動制御し
た状態のまま後退速度も流入調整弁で制御されるのみで
あったため、保圧切り換え時においては何ら絞り弁作用
（流量規制作用）は生じておらず、結局射出駆動体２の
保圧切り換え時における戻り方のバラツキを制御できる
構成（このピーク射出圧から保圧までの間の充填量を制
御管理できる構成）ではない。Therefore, in the prior art, the retraction speed is only controlled by the inflow regulating valve while the injection drive is controlled, so that no throttle valve action (flow rate regulating action) occurs at the time of switching the pressure holding. After all, it is not a configuration that can control the variation of the return of the injection driving body 2 when the holding pressure is switched (the configuration that can control and manage the filling amount from the peak injection pressure to the holding pressure).
【００３２】本発明はこの点、この射出駆動体２の戻り
方のバラツキをなくすため、戻り時間を一定に保持する
理想に近づけるために、絞り弁機構７や絞り量を調整で
きる流量調整弁機構８によって射出駆動体２の後退速度
を略一定の低速におさえ込むことで、射出駆動体２の戻
り方の成形サイクル毎のバラツキを略一定とし、ショー
トショットやバリの発生などの品質のバラツキを抑制
し、充填量を一定保持でき、品質向上と品質の安定化を
図るものである。In the present invention, the throttle valve mechanism 7 and a flow rate adjusting valve mechanism capable of adjusting the throttle amount in order to eliminate variations in the return of the injection driving body 2 and to approach the ideal of keeping the return time constant. 8, the retreat speed of the injection driving body 2 is suppressed to a substantially constant low speed, so that the variation of the return of the injection driving body 2 in each molding cycle is made substantially constant, and the quality variation such as short shots and burrs is reduced. It is intended to suppress the amount of filling and to keep the filling amount constant, thereby improving the quality and stabilizing the quality.
【００３３】それ故本実施例では、溶融樹脂３の流体排
出部６に絞り弁機構７若しくは流量調整弁機構８を設け
ている。Therefore, in the present embodiment, a throttle valve mechanism 7 or a flow regulating valve mechanism 8 is provided in the fluid discharge section 6 of the molten resin 3.
【００３４】例えば流入調整弁を油（流体）流入部に設
け、排出部には絞り弁作用を生じないチェックバルブを
設けていた従来構成において、このチェックバルブに代
えて排出流量をも積極的に規制し射出駆動体２の後退速
度を減速し一定に保持する絞り弁機構７若しくは流量調
整弁機構８を設ける構成としている。For example, in a conventional configuration in which an inflow regulating valve is provided at an oil (fluid) inflow portion and a check valve which does not generate a throttle valve function is provided at a discharge portion, the discharge flow rate is positively increased instead of the check valve. A restricting valve mechanism 7 or a flow rate adjusting valve mechanism 8 is provided to regulate and reduce the retreat speed of the injection driving body 2 to keep it constant.
【００３５】[0035]
【発明の効果】本発明は上述のように構成したから、保
圧切り換え時に常に射出駆動体は一定の後退速度で戻る
ため、射出駆動体の戻され方のバラツキが抑制される。
即ち保圧切り換え時のこの戻り現象における射出駆動体
の後退速度が成形サイクル毎に一定に保持されることと
なり、従って、保圧切り換え時の射出駆動体の戻され方
が何ら制御していない従来例に比べてバラツキが少なく
なり、故に充填量が一定となり成形条件が安定し高品質
化を図れると共に、品質の安定化を図れることとなる画
期的な射出成形機となる。Since the present invention is constructed as described above, the injection driving body always returns at a constant retreat speed when the holding pressure is switched, so that the variation in how the injection driving body is returned is suppressed.
In other words, the retreat speed of the injection driving body in this return phenomenon at the time of holding pressure switching is kept constant at each molding cycle, and therefore, the return of the injection driving body at the time of holding pressure switching is not controlled at all. Variations are reduced as compared with the example, so that the filling amount is constant, the molding conditions are stabilized, the quality can be improved, and the quality can be stabilized.
【００３６】また、請求項２，５記載の発明において
は、この射出駆動用シリンダ装置の流体排出量を調整で
きるため、射出駆動体の後退速度を調整制御できるか
ら、成形諸条件に応じて調整でき、一層確実に射出駆動
体の戻り現象におけるバラツキを確実に制御でき、この
戻り現象における射出駆動体の後退速度が成形サイクル
毎に一定に保持されることとなり、一層確実に充填量が
一定となり成形条件が安定し高品質化を図れると共に、
品質の安定化を図れることとなる画期的な射出成形機と
なる。According to the second and fifth aspects of the present invention, since the fluid discharge amount of the injection driving cylinder device can be adjusted, the retreat speed of the injection driving body can be adjusted and controlled. It is possible to more reliably control the variation in the return phenomenon of the injection drive body, and the retreat speed of the injection drive body in this return phenomenon is kept constant for each molding cycle, so that the filling amount is more reliably maintained. The molding conditions are stable and high quality can be achieved.
This is a revolutionary injection molding machine that can stabilize quality.
【００３７】また、請求項３，６記載の発明において
は、射出充填終了時から保圧状態までの間段階的に圧力
降下するように制御でき、一層確実に充填量が一定とな
るように制御でき成形条件が安定し高品質化を図れると
共に、品質の安定化を図れることとなる画期的な射出成
形機となる。According to the third and sixth aspects of the present invention, it is possible to control the pressure to drop stepwise from the end of the injection filling to the pressure holding state, so that the filling amount is more reliably kept constant. As a result, the molding conditions can be stabilized and the quality can be improved, and the quality can be stabilized.
【図１】本実施例の概略構成説明図である。FIG. 1 is a schematic structural explanatory view of the present embodiment.
【図２】本実施例の射出圧の変化を示す説明グラフであ
る。FIG. 2 is an explanatory graph showing a change in injection pressure according to the present embodiment.
【図３】本実施例のピーク射出圧から保圧までの間を段
階的に降下制御した場合の射出圧の変化を示す説明グラ
フである。FIG. 3 is an explanatory graph showing a change in injection pressure when a step-down control is performed in a stepwise manner from a peak injection pressure to a holding pressure in the present embodiment.
【図４】従来例の射出圧の変化を示す説明グラフであ
る。FIG. 4 is an explanatory graph showing a change in injection pressure in a conventional example.
１ 射出シリンダ ２ 射出駆動体 ３ 溶融樹脂 ４ 金型 ５ 射出駆動用シリンダ装置 ６ 流体排出部 ７ 絞り弁機構 ８ 流量調整弁機構 DESCRIPTION OF SYMBOLS 1 Injection cylinder 2 Injection drive body 3 Molten resin 4 Die 5 Injection drive cylinder device 6 Fluid discharge part 7 Throttle valve mechanism 8 Flow control valve mechanism
Claims (6)
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前記溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧し得るように構成した射出成形機において、前
記射出駆動体を射出駆動する射出駆動用シリンダ装置の
この射出駆動体が後方へ移動するとき流体を排出する流
体排出部に、この射出駆動体の後退速度を略一定に保持
する絞り弁機構を設け、前記射出駆動体を前記射出駆動
用シリンダ装置により射出駆動して前記金型内へ前記溶
融樹脂を射出した後前記保圧状態に切り換える際、射出
圧の減圧による樹脂クッション圧によって後方へ押し戻
される射出駆動体の後退速度が、前記絞り弁機構による
前記射出駆動用シリンダ装置の流体排出部における流量
規制作用によって、成形サイクル毎常に略一定に保持さ
れるように構成したことを特徴とする射出成形機。1. A molten resin is fed into a front portion of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the injection driving body retreated backward is pushed forward by the molten resin fed into the front portion. An injection molding machine configured to inject the molten resin into a mold from a front end of an injection cylinder and to further pressurize the injection drive body to maintain the pressure of the resin fed into the mold; A throttle valve mechanism for maintaining a retreat speed of the injection driving body substantially constant at a fluid discharging portion of the injection driving cylinder device for driving the body to discharge the fluid when the injection driving body moves backward; When the injection driving body is driven to be injected by the injection driving cylinder device to inject the molten resin into the mold and then is switched to the pressure-holding state, the injection pressure is reduced by reducing the injection pressure. The retreating speed of the injection driving body pushed back by the cushion pressure is maintained substantially constant at every molding cycle by the flow regulating action of the throttle valve mechanism at the fluid discharge portion of the injection driving cylinder device. An injection molding machine characterized in that:
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前方溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧し得るように構成した射出成形機において、前
記射出駆動体を射出駆動する射出駆動用シリンダ装置の
この射出駆動体が後方へ移動するとき流体を排出する流
体排出部に、この射出駆動体の後退速度を略一定に制御
し得る流量調整弁機構を設け、前記射出駆動体を前記射
出駆動用シリンダ装置により射出駆動して前記金型内へ
前記溶融樹脂を射出した後前記保圧状態に切り換える
際、射出圧の減圧による樹脂クッション圧によって後方
へ押し戻される射出駆動体の後退速度が、前記流量調整
弁機構による前記射出駆動用シリンダ装置の流体排出部
における流量規制作用によって、成形サイクル毎常に略
一定に保持されるように構成したことを特徴とする請求
項１記載の射出成形機。2. A molten resin is fed into a front part of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the molten driving resin fed into the front part pushes out the injection driving body which has receded rearward to the front. An injection molding machine configured to inject a front molten resin into a mold from a front end of an injection cylinder and further pressurize the injection drive body to maintain a pressure of the resin fed into the mold; A flow control valve mechanism that can control the retreat speed of the injection driving body to be substantially constant is provided at a fluid discharge portion of the injection driving cylinder device that drives the body to discharge the fluid when the injection driving body moves backward. When the injection driving body is driven to be injected by the injection driving cylinder device to inject the molten resin into the mold and then is switched to the pressure-holding state, the injection pressure is reduced. The retreat speed of the injection drive body pushed back by the resin cushion pressure is maintained substantially constant at every molding cycle by the flow rate regulating action of the fluid discharge portion of the injection drive cylinder device by the flow rate adjustment valve mechanism. The injection molding machine according to claim 1, wherein:
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前方溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧し得るように構成した射出成形機において、前
記射出駆動体を射出駆動する射出駆動用シリンダ装置の
この射出駆動体が後方へ移動するとき流体を排出する流
体排出部に、この射出駆動体の後退速度を略一定に制御
し得る流量調整弁機構を設け、前記射出駆動体を前記射
出駆動用シリンダ装置により射出駆動して前記金型内へ
前記溶融樹脂を射出した後前記保圧状態に切り換える
際、射出圧の減圧による樹脂クッション圧によって後方
へ押し戻される射出駆動体の後退速度が、前記流量調整
弁機構による前記射出駆動用シリンダ装置の流体排出部
における流量規制作用によって、射出充填終了時から保
圧状態までの間段階的に変化するように制御して、成形
サイクル毎常に略一定に保持されるように構成したこと
を特徴とする請求項２記載の射出成形機。3. A molten resin is fed into a front portion of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the molten driving resin fed into the front portion pushes out the injection driving body which has receded backward and is pushed forward. An injection molding machine configured to inject a front molten resin into a mold from a front end of an injection cylinder and further pressurize the injection drive body to maintain a pressure of the resin fed into the mold; A flow control valve mechanism that can control the retreat speed of the injection driving body to be substantially constant is provided at a fluid discharge portion of the injection driving cylinder device that drives the body to discharge the fluid when the injection driving body moves backward. When the injection driving body is driven to be injected by the injection driving cylinder device to inject the molten resin into the mold and then is switched to the pressure-holding state, the injection pressure is reduced. The retreat speed of the injection driving body pushed back by the resin cushion pressure is reduced from the end of injection filling to the pressure-holding state by the flow rate regulating action of the flow regulating valve mechanism in the fluid discharge portion of the injection drive cylinder device. 3. The injection molding machine according to claim 2, wherein the injection molding machine is controlled so as to change stepwise so as to be kept substantially constant at every molding cycle.
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前記溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧する射出成形法において、前記射出駆動体を射
出駆動する射出駆動用シリンダ装置のこの射出駆動体が
後方へ移動するとき流体を排出する流体排出部に、この
射出駆動体の後退速度を略一定に保持する絞り弁機構を
設け、前記射出駆動体を前記射出駆動用シリンダ装置に
より射出駆動して前記金型内へ前記溶融樹脂を射出した
後前記保圧状態に切り換える際、射出圧の減圧による樹
脂クッション圧によって後方へ押し戻される射出駆動体
の後退速度を、前記絞り弁機構による前記射出駆動用シ
リンダ装置の流体排出部における流量規制作用によっ
て、成形サイクル毎常に略一定に保持することを特徴と
する射出成形法。4. A molten resin is fed into a front part of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the molten driving resin fed into the front part pushes out the injection driving body which has receded backward to the front. In the injection molding method of injecting the molten resin into the mold from the front end of the injection cylinder and further pressing the injection drive body forward to keep the pressure of the resin fed into the mold, the injection drive body is driven for injection. A throttle valve mechanism for maintaining a retreat speed of the injection driving body substantially constant is provided in a fluid discharge portion of the injection driving cylinder device that discharges a fluid when the injection driving body moves rearward, and the injection driving body is When the molten resin is injected into the mold by injection driving by the injection driving cylinder device and then switched to the pressure-holding state, the pressure is reduced by the resin cushion pressure due to the reduced injection pressure. The retraction speed of the injection driving body pushed back backward is kept substantially constant at every molding cycle by the flow rate regulating action of the throttle valve mechanism at the fluid discharge portion of the injection drive cylinder device. Molding method.
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前方溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧する射出成形法において、前記射出駆動体を射
出駆動する射出駆動用シリンダ装置のこの射出駆動体が
後方へ移動するとき流体を排出する流体排出部に、この
射出駆動体の後退速度を略一定に制御し得る流量調整弁
機構を設け、前記射出駆動体を前記射出駆動用シリンダ
装置により射出駆動して前記金型内へ前記溶融樹脂を射
出した後前記保圧状態に切り換える際、射出圧の減圧に
よる樹脂クッション圧によって後方へ押し戻される射出
駆動体の後退速度を、前記流量調整弁機構による前記射
出駆動用シリンダ装置の流体排出部における流量規制作
用によって、成形サイクル毎常に略一定に保持すること
を特徴とする請求項４記載の射出成形法。5. A molten resin is fed into a front part of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the molten driving resin fed into the front part pushes out the injection driving body which is retreated backward to the front. In the injection molding method of injecting the front molten resin into the mold from the front end of the injection cylinder and further pressing the injection drive body forward to maintain the pressure of the resin fed into the mold, the injection drive body is driven for injection. A fluid discharge unit for discharging fluid when the injection drive of the injection drive cylinder device moves rearward, provided with a flow control valve mechanism capable of controlling a retreat speed of the injection drive to substantially constant; After the molten resin is injected into the mold by injecting the molten resin into the mold by the injection drive cylinder device, when the pressure is switched to the holding pressure state, the resin cushion is reduced by reducing the injection pressure. The retraction speed of the injection drive body pushed back by pressure is maintained substantially constant at each molding cycle by the flow rate regulating action of the flow control valve mechanism at the fluid discharge section of the injection drive cylinder device. The injection molding method according to claim 4.
は射出プランジャーなどの射出駆動体の前部に溶融樹脂
を送り込み、この前部に送り込んだ溶融樹脂により後方
へ後退した射出駆動体を前方へ押し出して、前方溶融樹
脂を射出シリンダ前端より金型内へ射出すると共に更に
この射出駆動体を前方へ加圧して金型内へ送り込んだ樹
脂を保圧する射出成形法において、前記射出駆動体を射
出駆動する射出駆動用シリンダ装置のこの射出駆動体が
後方へ移動するとき流体を排出する流体排出部に、この
射出駆動体の後退速度を略一定に制御し得る流量調整弁
機構を設け、前記射出駆動体を前記射出駆動用シリンダ
装置により射出駆動して前記金型内へ前記溶融樹脂を射
出した後前記保圧状態に切り換える際、射出圧の減圧に
よる樹脂クッション圧によって後方へ押し戻される射出
駆動体の後退速度を、前記流量調整弁機構による前記射
出駆動用シリンダ装置の流体排出部における流量規制作
用によって、射出充填終了時から保圧状態までの間段階
的に変化するように制御して、成形サイクル毎常に略一
定に保持することを特徴とする請求項５記載の射出成形
法。6. A molten resin is fed into a front portion of an injection driving body such as an injection screw or an injection plunger in an injection cylinder, and the molten driving resin fed into the front portion pushes out the injection driving body that has receded backward and is pushed forward. In the injection molding method of injecting the front molten resin into the mold from the front end of the injection cylinder and further pressing the injection drive body forward to maintain the pressure of the resin fed into the mold, the injection drive body is driven for injection. A fluid discharge unit for discharging fluid when the injection drive of the injection drive cylinder device moves rearward, provided with a flow control valve mechanism capable of controlling a retreat speed of the injection drive to substantially constant; After the molten resin is injected into the mold by injecting the molten resin into the mold by the injection drive cylinder device, when the pressure is switched to the holding pressure state, the resin cushion is reduced by reducing the injection pressure. The retreat speed of the injection drive body pushed back by the pressure is gradually increased from the end of injection filling to the pressure holding state by the flow rate regulating action of the flow rate adjusting valve mechanism at the fluid discharge portion of the injection drive cylinder device. 6. The injection molding method according to claim 5, wherein the injection molding method is controlled to change so as to be kept substantially constant at every molding cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25317997A JPH1190965A (en) | 1997-09-18 | 1997-09-18 | Injection molding machine and injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25317997A JPH1190965A (en) | 1997-09-18 | 1997-09-18 | Injection molding machine and injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1190965A true JPH1190965A (en) | 1999-04-06 |
Family
ID=17247649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25317997A Pending JPH1190965A (en) | 1997-09-18 | 1997-09-18 | Injection molding machine and injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1190965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7128854B2 (en) * | 2002-05-16 | 2006-10-31 | Sumitomo Heavy Industries, Ltd. | Control system for an injection molding machine and a method for controlling the injection molding machine |
-
1997
- 1997-09-18 JP JP25317997A patent/JPH1190965A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7128854B2 (en) * | 2002-05-16 | 2006-10-31 | Sumitomo Heavy Industries, Ltd. | Control system for an injection molding machine and a method for controlling the injection molding machine |
| US7485247B2 (en) | 2002-05-16 | 2009-02-03 | Sumitomo Heavy Industries, Ltd. | Control system for an injection molding machine and a method for controlling the injection molding machine |
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