JP2009184174A - Control method of mold-clamping device having half nut - Google Patents

Control method of mold-clamping device having half nut Download PDF

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JP2009184174A
JP2009184174A JP2008024887A JP2008024887A JP2009184174A JP 2009184174 A JP2009184174 A JP 2009184174A JP 2008024887 A JP2008024887 A JP 2008024887A JP 2008024887 A JP2008024887 A JP 2008024887A JP 2009184174 A JP2009184174 A JP 2009184174A
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mold
mold clamping
nut
engagement groove
movable
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JP4883642B2 (en
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Minetoshi Kako
峰稔 加古
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Meiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method for eliminating a dead time when starting strong mold opening due to a gap between a half nut and engagement groove of mold-clamping ram (tie bar). <P>SOLUTION: In the control method of mold-clamping device 1, mold-clamping force of a mold-clamping piston 12 is applied to a stationary mold 3 attached to a stationary plate 2 and a movable mold 4 attached to a movable plate 5 via the half nut 15 engaged with the engagement groove 26 of the mold-clamping ram 13 fixed to the movable plate 5, wherein, when the molding molded in the stationary mold 3 and the movable mold 4 is cooled and the mold opening is started, the mold-clamping ram 13 is moved at higher speed than the moving speed of the strong mold opening during a distance until the gap G2 in the mold-opening direction on the engagement part between the half nut 15 and the engagement groove 26 is removed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ハーフナットを有する型締装置における強力型開きの制御方法に関するものである。   The present invention relates to a method for controlling a strong mold opening in a mold clamping device having a half nut.
ハーフナットを有する型締装置は、例えば特許文献1及び特許文献2に開示がある。特許文献1は、移動ダイプレートと固定ダイプレートをタイバーとハーフナットを介して結合加圧する型締手段であって、大径シリンダと小径シリンダの2段から成る型締シリンダと、大径ラムと小径ラムの2段に形成されたラムを備え、大径ラムは大径シリンダに嵌挿され、小径ラムは小径シリンダに嵌挿され、小径ラムにはタイバーの基部が直結され、大径ラムの両側には大油室をそれぞれ設け、小径ラムのタイバー結合側には小油室を設け、上記型締シリンダの各大油室と小油室へ適宜油圧を供給してタイバーを適宜移動させる油圧供給手段を設けた構成としている。そして、大油室の型締昇圧前にタイバーが移動するまでのむだ時間と、タイバーのリング溝とハーフナットのリング溝との間の遊隙をなくすためのむだ時間とを解消するため、小油室に油圧を供給して短時間でタイバーをハーフナットと隙間なく結合させるようにしたものである。   For example, Patent Literature 1 and Patent Literature 2 disclose a mold clamping device having a half nut. Patent Document 1 is a mold clamping means for coupling and pressurizing a movable die plate and a fixed die plate via a tie bar and a half nut, a mold clamping cylinder having two stages of a large diameter cylinder and a small diameter cylinder, a large diameter ram, It has a ram formed in two stages, a small diameter ram, the large diameter ram is inserted into the large diameter cylinder, the small diameter ram is inserted into the small diameter cylinder, and the base of the tie bar is directly connected to the small diameter ram. Large oil chambers are provided on both sides, small oil chambers are provided on the tie bar coupling side of the small-diameter ram, and hydraulic pressure is supplied to each large oil chamber and small oil chamber of the mold clamping cylinder to move the tie bar accordingly. The supply means is provided. In order to eliminate the dead time for the tie bar to move before the mold oil pressure increase in the large oil chamber and the dead time for eliminating the gap between the tie bar ring groove and the half nut ring groove, Oil pressure is supplied to the oil chamber so that the tie bar can be coupled to the half nut without gaps in a short time.
また、特許文献2は、固定プラテンに進退自在に設けられたタイバーと、前記タイバーを進退させるハーフナット位置決め用サーボモータと、移動プラテンに設けられ前記タイバーと係合することで移動プラテンと前記タイバーとを固定するハーフナットと、前記ハーフナットを前記タイバーに係合させる係合機構と、前記固定プラテンと前記移動プラテンを押圧する油圧型締シリンダと、前記ハーフナット位置決め用サーボモータと前記油圧型締シリンダを制御する制御装置を備えた型締装置であって、前記制御装置は、前記油圧型締シリンダによる型締工程前に、前記ハーフナット位置決め用サーボモータを駆動して前記ハーフナットと前記タイバーの係合溝との隙間をなくすように制御するものである。   Patent Document 2 discloses a tie bar provided on a fixed platen so as to freely advance and retract, a half-nut positioning servo motor for moving the tie bar forward and backward, and a movable platen and the tie bar provided on a movable platen by engaging with the tie bar. A half nut for fixing the half nut to the tie bar, a hydraulic clamping cylinder for pressing the stationary platen and the movable platen, the half nut positioning servo motor, and the hydraulic die A mold clamping device comprising a control device for controlling a clamping cylinder, wherein the control device drives the half nut positioning servo motor before the mold clamping process by the hydraulic mold clamping cylinder, and Control is performed so as to eliminate the gap between the tie bar and the engagement groove.
このように、特許文献1,2は、共にハーフナットとタイバーの係合溝との隙間を予めなくしてむだ時間を解消する点で本願発明の課題と共通する。しかしながら、ハーフナットを用いた強力型開きを実施する型締装置において、強力型開きの開始時点ではハーフナットとタイバーの係合溝との隙間は、型締状態から型開き状態まで移動する必要があるため、その構成上の間隙の最大のものとなっている。そのため、間隙を無くすための移動距離は型締工程前のそれより大となり、むだ時間も無視できないほど大きなものとなる。また、成形品の離型を良好にするため強力型開きの速度を比較的低速に設定する場合には、むだ時間はさらに増大するのである。特許文献1,2において課題とし解決しているのは型締工程前のハーフナットとタイバーの係合溝との隙間に関してのみであり、強力型開き前のハーフナットとタイバーの係合溝との隙間に関する記載はない。
特開2002−127216号公報 特開2005−238830号公報
Thus, Patent Documents 1 and 2 are both in common with the subject of the present invention in that the dead time is eliminated by eliminating the gap between the half nut and the engagement groove of the tie bar in advance. However, in a mold clamping device that performs strong mold opening using a half nut, the gap between the half nut and the engagement groove of the tie bar needs to move from the mold clamped state to the mold opened state at the start of the strong mold opening. Therefore, it is the largest gap in the configuration. Therefore, the moving distance for eliminating the gap is longer than that before the mold clamping process, and the dead time is so large that it cannot be ignored. Further, when the speed of opening the strong mold is set to be relatively low in order to improve the release of the molded product, the dead time further increases. In Patent Documents 1 and 2, the problem is solved only with respect to the gap between the half nut before the mold clamping process and the engagement groove of the tie bar. There is no description about the gap.
JP 2002-127216 A JP 2005-238830 A
本発明は、上記した問題を解決すべくなされたものであって、ハーフナットと型締ラム(タイバ)の係合溝との間隙に起因する強力型開き開始時のむだ時間を解消する制御方法を提供することを目的とする。   The present invention has been made to solve the above-described problem, and is a control method for eliminating the dead time at the start of powerful mold opening caused by the gap between the half nut and the engagement groove of the mold clamping ram (tie bar). The purpose is to provide.
本発明は、可動盤に固着した型締ラムの係合溝又はタイバの係合溝に係合するハーフナットを介して型締ピストンの型締力を、固定盤に取付けた固定型と前記可動盤に取付けた可動型とに付与する型締装置の制御方法であって、前記固定型と前記可動型内で成形された成形品が冷却されて型開き開始するとき、前記ハーフナットと前記係合溝との係合部における型開き方向の間隙が消滅するまでの距離の間、強力型開きの移動速度より速い速度で型締ラム又はタイバを移動させるハーフナットを有する型締装置の制御方法に関する。   According to the present invention, the mold clamping force of the mold clamping piston is fixed to the stationary platen via the half nut engaged with the engagement groove of the mold clamping ram fixed to the movable platen or the engagement groove of the tie bar. A method of controlling a mold clamping device applied to a movable mold attached to a board, wherein when the molded product molded in the fixed mold and the movable mold is cooled and mold opening starts, the half nut and the engagement Method of controlling a mold clamping device having a half nut that moves a mold clamping ram or tie bar at a speed faster than the moving speed of a strong mold opening for a distance until the gap in the mold opening direction at the engaging portion with the mating groove disappears About.
本発明のハーフナットを有する型締装置の制御方法によれば、ハーフナットと型締ラム(タイバ)の係合溝との間隙に起因する強力型開き開始時のむだ時間を解消することができる。   According to the method for controlling a mold clamping device having a half nut of the present invention, it is possible to eliminate a dead time at the start of opening of a strong mold due to a gap between the half nut and an engagement groove of a mold clamping ram (tie bar). .
図面に基づいて、本発明の実施の形態を詳細に説明する。図1は、本発明を実施する型締装置とその制御系の概要を示す説明図である。図2は、ハーフナットと型締ラムとの係合状態を示す係合部の断面図である。図3は、本発明を実施する他の型締装置を示す部分断面図である。   Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing an outline of a mold clamping device and a control system for carrying out the present invention. FIG. 2 is a cross-sectional view of the engaging portion showing an engaged state between the half nut and the mold clamping ram. FIG. 3 is a partial cross-sectional view showing another mold clamping apparatus for carrying out the present invention.
図1に示すように、型締装置1は、固定盤2に取付けた固定型3に対し可動盤5に取付けた可動型4を、固定盤2に固着したサーボモータ7で駆動するボール螺子8と可動盤5に取付けたボールナット10とによって近接させ型合わせするように型閉じ移動させる。そして、可動盤5の可動型4を取付けた面の裏面に連結箱25を介して固着した型締ラム13は、型閉じ前進に伴って型締ピストン12の中心貫通孔を遊貫して移動する。固定型3と可動型4が密着する位置又はその所定距離手前の位置において、型締ラム13の後部に刻設した係合溝26にハーフナット15,15の係合溝34が容易に進入して係合するように、型締ピストン12の可動盤5側端面にハウジング21を介して固着したロックシリンダ14,14がハーフナット15,15を前進駆動させる。このときの係合溝26と係合溝34との係合部の係合状態は、図2の(a)に示す。すなわち、係合溝26と係合溝34とは互いにその壁面が当接しないような間隙G1をもって係合する。ここで、係合溝26と係合溝34は、多条のものとして例示したが、一条のものであってもよい。その場合、一方の係合溝は存在せず突出部のみとなる。また、係合溝の断面形状は型締側が垂直で型開き側が傾斜した台形状で例示したが、矩形状、鋸刃状、三角形状等いかなる形状であってもよい。なお、固定盤2と型締シリンダ11の四隅の間には可動盤5の四隅を貫通して摺動させるタイバ6が張設されている。また、ボール螺子支持部16は、型締シリンダ11の両側面に固着されボール螺子8の端部を回転自在に支持する。さらに、蛇腹9は、ボール螺子8を保護するため、ボール螺子8のサーボモータ7とボールナット10間に設けたものである。   As shown in FIG. 1, the mold clamping device 1 includes a ball screw 8 that drives a movable die 4 attached to a movable platen 5 to a fixed die 3 attached to a fixed platen 2 by a servo motor 7 fixed to the fixed platen 2. And the ball nut 10 attached to the movable platen 5 are moved close to each other so that the molds are brought into close proximity. Then, the mold clamping ram 13 fixed to the back surface of the movable plate 5 to which the movable mold 4 is attached via the connecting box 25 moves loosely through the central through hole of the mold clamping piston 12 as the mold closing advances. To do. At a position where the fixed mold 3 and the movable mold 4 are in close contact with each other or a position before that predetermined distance, the engagement grooves 34 of the half nuts 15 and 15 easily enter the engagement grooves 26 carved in the rear part of the mold clamping ram 13. The lock cylinders 14 and 14 fixed to the end surface of the mold clamping piston 12 on the movable platen 5 side through the housing 21 drive the half nuts 15 and 15 forward. The engagement state of the engagement portion between the engagement groove 26 and the engagement groove 34 at this time is shown in FIG. That is, the engagement groove 26 and the engagement groove 34 are engaged with each other with a gap G1 such that the wall surfaces thereof do not contact each other. Here, although the engagement groove 26 and the engagement groove 34 have been exemplified as multiple lines, a single line may be used. In that case, one engagement groove does not exist and only the protruding portion is provided. In addition, the cross-sectional shape of the engagement groove is exemplified as a trapezoidal shape in which the mold clamping side is vertical and the mold opening side is inclined, but may be any shape such as a rectangular shape, a saw blade shape, or a triangular shape. In addition, tie bars 6 that pass through the four corners of the movable platen 5 are stretched between the four corners of the fixed platen 2 and the mold clamping cylinder 11. The ball screw support portion 16 is fixed to both side surfaces of the mold clamping cylinder 11 and rotatably supports the end portion of the ball screw 8. Further, the bellows 9 is provided between the servo motor 7 of the ball screw 8 and the ball nut 10 in order to protect the ball screw 8.
ハーフナット15が係合溝26に係合した後、制御装置32は、可変ポンプ30が制御装置32の指令信号に応じてタンク31から吸引して吐出した圧油を、ソレノイド29が励磁されて切換えられた方向切換弁27を経由して、型締シリンダ11の中心貫通穴と型締ピストン12の反可動盤5側の後部とパッキン押え35とで形成される型締室20へ供給する。その結果、型締ピストン12は前進し、ハーフナット15を介して型締ラム13を前進させ、連結箱25と可動盤5を介して可動型4を型閉じさせる。そして、可動型4が固定型3に密着してさらに可変ポンプ30の吐出が継続するので、型締室20内の油圧は上昇し、図示しないリリーフ弁等で規定された型締油圧まで到達して型締が実行される。このときの係合溝26と係合溝34との係合部の係合状態は、図2の(b)に示す。すなわち、係合溝26と係合溝34とは型締方向で当接し型開き方向に間隙G2を有するように係合する。   After the half nut 15 is engaged with the engagement groove 26, the control device 32 causes the solenoid 29 to be excited with the pressure oil sucked and discharged from the tank 31 by the variable pump 30 in accordance with the command signal of the control device 32. Via the switched direction switching valve 27, the mold is supplied to the mold clamping chamber 20 formed by the center through hole of the mold clamping cylinder 11, the rear part of the mold clamping piston 12 on the side opposite to the movable plate 5, and the packing presser 35. As a result, the mold clamping piston 12 moves forward, the mold clamping ram 13 is advanced via the half nut 15, and the movable mold 4 is closed via the connection box 25 and the movable platen 5. Since the movable mold 4 comes into close contact with the fixed mold 3 and the discharge of the variable pump 30 continues, the hydraulic pressure in the mold clamping chamber 20 rises and reaches the mold clamping pressure defined by a relief valve (not shown). The mold is clamped. The engaging state of the engaging portion between the engaging groove 26 and the engaging groove 34 at this time is shown in FIG. In other words, the engagement groove 26 and the engagement groove 34 are brought into contact with each other in the mold clamping direction so as to have a gap G2 in the mold opening direction.
続いて、固定型3に当接する図示しない射出装置から溶融原料が、型合わせした固定型3と可動型4で形成されるキャビティに射出される。キャビティに充填された溶融原料は冷却・固化して成形品となる。成形品は、冷却に伴う収縮に基づいてキャビティ表面に締着又は密着するので、成形品をキャビティ面から離型させるための型開き開始時には、比較的大きな力が必要になる。すなわち、サーボモータ7、ボール螺子8及びボールナット10による型開きでは力不足となるため、型締シリンダ11の中心貫通穴と型締ピストン12の可動盤5側の前部とパッキン押え22とで形成される型開室19へ、可変ポンプ30が制御装置32の指令信号に応じてタンク31から吸引して吐出した圧油を、ソレノイド28が励磁されて切換えられた方向切換弁27を経由して供給するようにして作動する強力型開きを実行するのである。このときの係合溝26と係合溝34との係合部の係合状態は、図2の(c)に示す。すなわち、係合溝26と係合溝34とは型開き方向で当接し型締方向に間隙G3を有するように係合する。   Subsequently, a molten raw material is injected into a cavity formed by the fixed mold 3 and the movable mold 4 that are matched with each other from an injection device (not shown) that contacts the fixed mold 3. The molten raw material filled in the cavity is cooled and solidified to form a molded product. Since the molded product is fastened or closely adhered to the cavity surface based on the shrinkage caused by cooling, a relatively large force is required at the start of mold opening for releasing the molded product from the cavity surface. That is, since the force is insufficient when the mold is opened by the servo motor 7, the ball screw 8, and the ball nut 10, the center through hole of the mold clamping cylinder 11, the front part of the mold clamping piston 12 on the movable platen 5 side, and the packing presser 22 are used. The pressure oil sucked and discharged from the tank 31 by the variable pump 30 in response to the command signal of the control device 32 to the formed mold opening 19 is passed through the direction switching valve 27 switched by the solenoid 28 being excited. It performs a powerful mold opening that operates as if it were supplied. The engagement state of the engagement portion between the engagement groove 26 and the engagement groove 34 at this time is shown in FIG. That is, the engaging groove 26 and the engaging groove 34 are engaged with each other so as to abut in the mold opening direction and have a gap G3 in the mold clamping direction.
強力型開きは、制御装置32で設定された射出充填に続く射出保持圧力制御が終了したとき計時開始する冷却時間タイマの計時が終了した時点から開始する。すなわち、図2(b)の状態から図2(c)の状態に至るためには、型締ピストン12とハーフナット15は間隙G2に相当する距離を移動しなければならない。G2(G3)は、例えば型締力6374kNの型締装置において2mmである。ところで、強力型開きは、成形品の形状や樹脂原料の種類によっては極めて低速にしないと良好な離型が行われないことがある。そのような低速で2mm移動させるときには数秒の時間を要することがあり、成形サイクル時間の延滞を招くことになる。そこで、制御装置32は、位置センサ18で検出したハーフナット15の係合溝34の位置とサーボモータ7のエンコーダで検出した型締ラム13の係合溝26の位置とに基づいて間隙G2を演算して求める。そして、制御装置32は、可変ポンプ30の吐出量がその最大吐出量又はそれに近くかつ、強力型開きに必要な小吐出量よりも多い吐出量となるような信号を出力する。そのようにして、比較的高速で型開き方向に移動する型締ラム13にハウジング21を介して駆動されたハーフナット15は、間隙G2の距離の中間に予め設定した減速位置で減速制御され所定の強力型開き速度になって図2(c)の状態となる。そして、その状態においてハーフナット15は一旦停止するかまたはさらに継続して型開き方向へ移動することにより、強力型開きが実行される。   The powerful mold opening is started from the time when the time measurement of the cooling time timer, which starts the time measurement when the injection holding pressure control following the injection filling set by the control device 32 is completed, is completed. That is, in order to reach the state of FIG. 2C from the state of FIG. 2B, the mold clamping piston 12 and the half nut 15 must move a distance corresponding to the gap G2. G2 (G3) is 2 mm in a mold clamping device having a mold clamping force of 6374 kN, for example. By the way, depending on the shape of the molded product and the type of the resin raw material, the strong mold opening may not be released well unless it is extremely slow. When moving 2 mm at such a low speed, a time of several seconds may be required, resulting in a delay in the molding cycle time. Therefore, the control device 32 sets the gap G2 based on the position of the engagement groove 34 of the half nut 15 detected by the position sensor 18 and the position of the engagement groove 26 of the mold clamping ram 13 detected by the encoder of the servo motor 7. Find by calculation. Then, the control device 32 outputs a signal such that the discharge amount of the variable pump 30 is equal to or close to the maximum discharge amount and is larger than the small discharge amount necessary for the powerful mold opening. In this way, the half nut 15 driven through the housing 21 to the mold clamping ram 13 that moves in the mold opening direction at a relatively high speed is decelerated and controlled at a predetermined deceleration position in the middle of the distance of the gap G2. It becomes the state of FIG. In this state, the half nut 15 is temporarily stopped or further continuously moved in the mold opening direction, whereby the strong mold opening is executed.
前記した間隙G2の距離の中間に予め設定した減速位置は、例えば、間隙G2が2mmの場合1.5mmのように設定される。すなわち、間隙G2が消滅する目標位置ではハーフナット15の移動速度は強力型開きの速度以下に減速されていないと離型に悪影響を及ぼすので、減速位置は、減速制御が十分に行われ、さらに減速制御の制御ばらつきのための余裕をも含めたものとして設定されるのである。この減速制御の制御ばらつきを解消するために、位置センサ18で検出する位置信号に応じてソレノイド28とソレノイド29を交互に適宜切換えて方向切換弁27を切換え制御することが効果的である。また、方向切換弁27をサーボ弁に置き換え、位置センサ18で検出する型締ピストン12の位置が目標位置と一致するように制御装置32がサーボ弁をクローズドループで位置決め制御するようにしてもよい。   For example, when the gap G2 is 2 mm, the deceleration position preset in the middle of the distance of the gap G2 is set to 1.5 mm. That is, at the target position where the gap G2 disappears, if the moving speed of the half nut 15 is not decelerated below the speed of the strong mold opening, the mold release is adversely affected. Therefore, the deceleration position is sufficiently controlled for deceleration. It is set to include a margin for control variations in deceleration control. In order to eliminate the control variation of the deceleration control, it is effective to switch the direction switching valve 27 by switching the solenoid 28 and the solenoid 29 appropriately according to the position signal detected by the position sensor 18. Alternatively, the direction switching valve 27 may be replaced with a servo valve so that the control device 32 controls the servo valve in a closed loop so that the position of the mold clamping piston 12 detected by the position sensor 18 matches the target position. .
係合溝26と係合溝34とが型開き方向に当接した位置から所定距離の間強力型開きした後、ロックシリンダ14を後退駆動してハーフナット15の型締ラム13との係合を解除する。次に、サーボモータ7でボール螺子8を型閉じとは逆方向に回転駆動して可動盤5を型締ラム13とともに型開き後退させる。所定の型開き停止位置でサーボモータ7の回転を停止させて型開きを完了させる。そして、その前後に、型締ラム13の可動盤5側端部に埋設したエジェクタシリンダ17を前進させ、エジェクタシリンダ17のロッドに固着されエジェクタピン24を立設するエジェクタバー23を前進させ、可動型4に付着した成形品をエジェクタピン24で突き出して取出す。   After the engagement groove 26 and the engagement groove 34 are strongly opened for a predetermined distance from the position where the engagement groove 34 abuts in the mold opening direction, the lock cylinder 14 is driven backward to engage the mold clamping ram 13 of the half nut 15. Is released. Next, the ball screw 8 is rotationally driven in the direction opposite to the mold closing by the servo motor 7, and the movable platen 5 is moved back together with the mold clamping ram 13. The rotation of the servo motor 7 is stopped at a predetermined mold opening stop position to complete the mold opening. Then, before and after that, the ejector cylinder 17 embedded in the end of the mold clamping ram 13 on the movable platen 5 side is advanced, and the ejector bar 23 fixed to the rod of the ejector cylinder 17 and erecting the ejector pin 24 is advanced to be movable. The molded product adhering to the mold 4 is ejected by the ejector pin 24 and taken out.
次に、型締装置1の他の態様である型締装置101について説明する。型締装置101は、固定型103を取付ける固定盤102と、固定盤102の四隅に設けた型締シリンダ111と、型締シリンダ111に往復移動可能に嵌挿した型締ピストン112を固定盤102側の端部に備え他端部近傍に係合溝126を備えるタイバ106と、可動型104を取付けタイバ106を四隅で貫通して摺動させる可動盤105と、可動盤105の可動型104取付け面の裏面にハウジング121を介して固着されたロックシリンダ114と、ロックシリンダ114のロッドに取付けられハウジング121内を前進して係合溝126と係合するハーフナット115と、固定盤102と可動盤105間に架設され可動盤105を開閉駆動する型開閉シリンダ33とからなる。型締ピストン112の可動盤105側と型締シリンダ111とで型締室120が、型締ピストン112の固定盤102側と型締シリンダ111とで型開室119がそれぞれ形成される。ロックシリンダ114が前進しハーフナット115の係合溝134がタイバ106の係合溝126に進入して係合し、型締室120に圧油が供給されると、型締ピストン112は可動盤105を固定盤102側に牽引して固定型103と可動型104が型締される。係合溝126と係合溝134が係合した状態で型開室119に圧油が供給されると、強力型開きが実行される。このとき、型締ピストン112はタイバ106を押圧し、その力は係合溝126、係合溝134、ハーフナット115、ハウジング121を経由して可動盤105に伝達され、可動型104を固定型103から強力に離隔させる。このように、型締装置101は、型締シリンダ、型締ピストン及び係合溝の配設位置が型締装置1と相違するが、ハーフナットの係合溝と他の係合溝との係合部における間隙は両者で同様に存在する。したがって、型締装置1における発明は型締装置101にも有効に適用できるのである。   Next, a mold clamping device 101 which is another aspect of the mold clamping device 1 will be described. The mold clamping apparatus 101 includes a stationary platen 102 on which a stationary mold 103 is mounted, a mold clamping cylinder 111 provided at four corners of the stationary platen 102, and a mold clamping piston 112 that is fitted in the mold clamping cylinder 111 so as to be reciprocally movable. A tie bar 106 having an engagement groove 126 in the vicinity of the other end, a movable plate 104 that allows the movable die 104 to slide through the four corners, and a movable die 104 attached to the movable plate 105. A lock cylinder 114 fixed to the rear surface of the surface via a housing 121, a half nut 115 attached to a rod of the lock cylinder 114 and advanced in the housing 121 to engage with the engagement groove 126, and the fixed platen 102 and movable A mold opening / closing cylinder 33 is provided between the panels 105 and drives the movable panel 105 to open and close. A mold clamping chamber 120 is formed by the movable platen 105 side of the mold clamping piston 112 and the mold clamping cylinder 111, and a mold opening chamber 119 is formed by the stationary platen 102 side of the mold clamping piston 112 and the mold clamping cylinder 111. When the lock cylinder 114 moves forward and the engagement groove 134 of the half nut 115 enters and engages with the engagement groove 126 of the tie bar 106, and pressure oil is supplied to the mold clamping chamber 120, the mold clamping piston 112 becomes movable. The fixed mold 103 and the movable mold 104 are clamped by pulling 105 to the fixed platen 102 side. When pressure oil is supplied to the mold opening chamber 119 in a state where the engaging groove 126 and the engaging groove 134 are engaged, strong mold opening is executed. At this time, the mold clamping piston 112 presses the tie bar 106, and the force is transmitted to the movable platen 105 via the engagement groove 126, the engagement groove 134, the half nut 115, and the housing 121, and the movable mold 104 is fixed. Strongly separated from 103. As described above, the mold clamping device 101 is different from the mold clamping device 1 in the arrangement positions of the mold clamping cylinder, the mold clamping piston, and the engagement groove, but the relationship between the engagement groove of the half nut and the other engagement groove. The gap at the joint exists similarly in both. Therefore, the invention in the mold clamping device 1 can be effectively applied to the mold clamping device 101 as well.
ところで、成形品の形状、成形原料の種類、成形条件等に依存して、射出保持圧力制御後の成形品冷却時間中に型締力を解除しても成形品に何ら悪影響を及ぼさない成形状態がある。そのようなときには、射出保持圧力制御の終了時点から冷却時間タイマの計時完了時点までの任意の時点で型締力を解除するとともに、係合溝26とハーフナット15の係合溝34又は、係合溝126とハーフナット115の係合溝134との係合部において型締時に形成された型開き方向の間隙G2が消滅し強力型開き開始の状態となるように、強力型開きに先立ってハーフナット15又はタイバ106を予め移動させておく。このように制御することにより、冷却時間後に係合溝の間隙を消滅させるようなむだ時間を回避でき、成形サイクル時間の短縮を図ることができる。   By the way, depending on the shape of the molded product, the type of molding raw material, molding conditions, etc., the molded state that does not have any adverse effect on the molded product even if the clamping force is released during the cooling time of the molded product after injection holding pressure control There is. In such a case, the mold clamping force is released at an arbitrary time from the end of the injection holding pressure control to the time when the cooling time timer finishes timing, and the engagement groove 26 and the engagement groove 34 of the half nut 15 are engaged. Prior to strong mold opening, the gap G2 in the mold opening direction formed at the time of mold clamping disappears at the engagement portion between the mating groove 126 and the engagement groove 134 of the half nut 115, and the strong mold opening is started. The half nut 15 or the tie bar 106 is moved in advance. By controlling in this way, it is possible to avoid a dead time for eliminating the gap between the engaging grooves after the cooling time, and to shorten the molding cycle time.
この発明は以上説明した実施例に限定されるものではなく、発明の趣旨を逸脱しない範囲内において種々の変更を付加して実施することができる。例えば、型締装置は上記実施の形態で説明したもの以外に多くの形態のものがあるが、ハーフナットを有するものであればそれは全て本発明の範囲に含まれる。   The present invention is not limited to the embodiments described above, and various modifications can be added and implemented without departing from the spirit of the invention. For example, there are many types of mold clamping devices other than those described in the above embodiment, and any type having a half nut is included in the scope of the present invention.
本発明を実施する型締装置とその制御系の概要を示す説明図である。It is explanatory drawing which shows the outline | summary of the mold clamping apparatus which implements this invention, and its control system. ハーフナットと型締ラムとの係合状態を示す係合部の断面図である。It is sectional drawing of the engaging part which shows the engagement state of a half nut and a mold clamping ram. 本発明を実施する他の型締装置を示す部分断面図である。It is a fragmentary sectional view which shows the other mold clamping apparatus which implements this invention.
符号の説明Explanation of symbols
1,101 型締装置
2,102 固定盤
3,103 固定型
4,104 可動型
5,105 可動盤
6,106 タイバ
7 サーボモータ
8 ボール螺子
9 蛇腹
10 ボールナット
11,111 型締シリンダ
12,112 型締ピストン
13 型締ラム
14,114 ロックシリンダ
15,115 ハーフナット
16 ボール螺子支持部
17 エジェクタシリンダ
18 位置センサ
19,119 型開室
20,120 型締室
21,121 ハウジング
22,35 パッキン押え
23 エジェクタバー
24 エジェクタピン
25 連結箱
26,34,126,134 係合溝
27 方向切換弁
28,29 ソレノイド
30 可変ポンプ
31 タンク
32 制御装置
33 型開閉シリンダ
G1,G2,G3 間隙
DESCRIPTION OF SYMBOLS 1,101 Clamping device 2,102 Fixed platen 3,103 Fixed type 4,104 Movable type 5,105 Movable platen 6,106 Tieber 7 Servo motor 8 Ball screw 9 Bellows 10 Ball nut 11, 111 Clamping cylinder 12,112 Mold clamping piston 13 Mold clamping ram 14, 114 Lock cylinder 15, 115 Half nut 16 Ball screw support 17 Ejector cylinder 18 Position sensor 19, 119 Mold opening 20, 120 Mold clamping chamber 21, 121 Housing 22, 35 Packing retainer 23 Ejector bar 24 Ejector pin 25 Junction box 26, 34, 126, 134 Engaging groove 27 Direction switching valve 28, 29 Solenoid 30 Variable pump 31 Tank 32 Control device 33 Type opening / closing cylinder G1, G2, G3 Gap

Claims (2)

  1. 可動盤に固着した型締ラムの係合溝又はタイバの係合溝に係合するハーフナットを介して型締ピストンの型締力を、固定盤に取付けた固定型と前記可動盤に取付けた可動型とに付与する型締装置の制御方法であって、
    前記固定型と前記可動型内で成形された成形品が冷却されて型開き開始するとき、前記ハーフナットと前記係合溝との係合部における型開き方向の間隙が消滅するまでの距離の間、強力型開きの移動速度より速い速度で型締ラム又はタイバを移動させることを特徴とするハーフナットを有する型締装置の制御方法。
    The mold clamping force of the mold clamping piston is attached to the fixed plate and the movable plate through a half nut engaged with the engagement groove of the mold clamping ram fixed to the movable plate or the engagement groove of the tie bar. A method for controlling a mold clamping device to be applied to a movable mold,
    When the molded product molded in the fixed mold and the movable mold is cooled and mold opening is started, the distance until the gap in the mold opening direction in the engaging portion between the half nut and the engaging groove disappears. A method for controlling a mold clamping device having a half nut, wherein the mold clamping ram or tie bar is moved at a speed faster than the moving speed of the strong mold opening.
  2. 可動盤に固着した型締ラムの係合溝又はタイバの係合溝に係合するハーフナットを介して型締ピストンの型締力を、固定盤に取付けた固定型と前記可動盤に取付けた可動型とに付与する型締装置の制御方法であって、
    射出保持圧力制御の終了時点から計時開始する冷却時間タイマの計時中に型締力を解除し、前記係合溝と前記ハーフナットとの係合部において型締時に形成された型開き方向の間隙が消滅し強力型開き開始の状態となるように強力型開きに先立ってハーフナット又はタイバを移動させることを特徴とするハーフナットを有する型締装置の制御方法。
    The mold clamping force of the mold clamping piston is attached to the fixed plate and the movable plate through a half nut engaged with the engagement groove of the mold clamping ram fixed to the movable plate or the engagement groove of the tie bar. A method for controlling a mold clamping device to be applied to a movable mold,
    The mold clamping force is released while the cooling time timer starts counting from the end of injection holding pressure control, and the gap in the mold opening direction formed at the time of mold clamping at the engagement portion between the engagement groove and the half nut A method for controlling a mold clamping device having a half nut, wherein the half nut or tie bar is moved prior to the strong mold opening so that the dies disappear and the strong mold opening is started.
JP2008024887A 2008-02-05 2008-02-05 Method for controlling mold clamping device having half nut Active JP4883642B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2011110700A (en) * 2009-11-23 2011-06-09 Meiki Co Ltd Mold clamping device and method for controlling the same

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JP2021041629A (en) 2019-09-12 2021-03-18 日精樹脂工業株式会社 Mold clamping device with strong mold opening mechanism

Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2003340827A (en) * 2002-05-28 2003-12-02 Meiki Co Ltd Mold clamping device
JP2005053022A (en) * 2003-08-01 2005-03-03 Meiki Co Ltd Mold clamping device and mold clamping method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003340827A (en) * 2002-05-28 2003-12-02 Meiki Co Ltd Mold clamping device
JP2005053022A (en) * 2003-08-01 2005-03-03 Meiki Co Ltd Mold clamping device and mold clamping method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011110700A (en) * 2009-11-23 2011-06-09 Meiki Co Ltd Mold clamping device and method for controlling the same

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