JP2006015552A - Mold thickness adjusting method of toggle type mold clamping device - Google Patents

Mold thickness adjusting method of toggle type mold clamping device Download PDF

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JP2006015552A
JP2006015552A JP2004194249A JP2004194249A JP2006015552A JP 2006015552 A JP2006015552 A JP 2006015552A JP 2004194249 A JP2004194249 A JP 2004194249A JP 2004194249 A JP2004194249 A JP 2004194249A JP 2006015552 A JP2006015552 A JP 2006015552A
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mold
pressure receiving
speed
receiving plate
adjusting method
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JP4313259B2 (en
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Takashi Hakoda
隆 箱田
Susumu Morozumi
進 両角
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Nissei Plastic Industrial Co Ltd
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Nissei Plastic Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To achieve the reduction of the number of work processes and the enhancement of production efficiency by shortening the time required in the adjustment of mold thickness and to exclude room letting an error enter to ensure sufficient accuracy and stability. <P>SOLUTION: This mold thickness adjusting method of a toggle type mold clamping device has a first process T1 for allowing a pressure receiving plate 2 to advance at a first speed Vh becoming a high speed from a retreat position Xr in a state that a toggle link mechanism 3 is stretched and allowing the pressure receiving plate 2 to retreat by a predetermined distance Ls when the pressure receiving plate 2 reaches a mold closing position Xc and a second process T2 for allowing the pressure receiving plate 2 to advance at a second speed Vs becoming a low speed after the first process to bend the toggle link mechanism 3 after the pressure receiving plate 2 reaches the mold closing position Xc to perform mold opening by a predetermined distance Lr and subsequently advancing the pressure receiving plate 2 by the distance Lc corresponding to clamping quantity obtaining target clamping force. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、圧受盤を所定の位置へ移動させて型厚調整を行うトグル式型締装置の型厚調整方法に関する。   The present invention relates to a mold thickness adjusting method for a toggle type mold clamping apparatus that performs mold thickness adjustment by moving a pressure receiving plate to a predetermined position.

一般に、射出成形機に備える金型を型締するトグル式型締装置は、可動型を支持する可動盤と圧受盤に支持される駆動部により進退変位するクロスヘッド間をトグルリンク機構により連結し、クロスヘッドの加圧力を増圧して可動盤に伝達する機能を有しており、トグルリンク機構がほぼ伸長しきった状態におけるタイバーの伸びに基づいて所定の型締力が発生する。このため、金型を交換した際には、所定の型締力が発生するように圧受盤の位置を設定する必要があり、通常、圧受盤の位置は、型厚調整装置により自動で設定される。   In general, a toggle type mold clamping device for clamping a mold provided in an injection molding machine uses a toggle link mechanism to connect between a movable plate that supports a movable die and a crosshead that moves forward and backward by a drive unit supported by a pressure receiving plate. The crosshead has a function of increasing the pressure applied to the crosshead and transmitting it to the movable platen, and a predetermined mold clamping force is generated based on the extension of the tie bar when the toggle link mechanism is almost extended. For this reason, when the mold is replaced, it is necessary to set the position of the pressure receiving plate so that a predetermined clamping force is generated. Usually, the position of the pressure receiving plate is automatically set by the mold thickness adjusting device. The

従来、この種の型厚調整装置を用いた型厚調整方法としては、特許第2668599号公報で開示される射出成形機の自動型厚調整方法が知られている。この自動型厚調整方法は、金型を型締用サーボモータの出力トルクで押し付けながらリヤプラテンを後方に移動させて行うトグル式型締装置を有する射出成形機の自動型厚調整方法であって、金型にかかる圧力を型締装置に設けた金型圧力検出手段により検出し、指令値と金型圧力検出手段の出力との差を型締用サーボモータのトルク制限値としてフィードバック制御し、金型にかかる圧力を所定の圧力以下に制限しながらリアプラテンを移動させて型厚調整を行うものである。
特許第2668599号
Conventionally, as a mold thickness adjusting method using this type of mold thickness adjusting apparatus, an automatic mold thickness adjusting method for an injection molding machine disclosed in Japanese Patent No. 2668599 is known. This automatic mold thickness adjusting method is an automatic mold thickness adjusting method for an injection molding machine having a toggle type mold clamping device that moves the rear platen backward while pressing the mold with the output torque of the servo motor for mold clamping, The pressure applied to the mold is detected by the mold pressure detection means provided in the mold clamping device, and the difference between the command value and the output of the mold pressure detection means is feedback controlled as the torque limit value of the mold clamping servo motor. The mold plate thickness adjustment is performed by moving the rear platen while limiting the pressure applied to the mold to a predetermined pressure or less.
Japanese Patent No. 2668599

しかし、上述した従来のトグル式型締装置の型厚調整方法は、次のような問題点があった。   However, the mold thickness adjusting method of the conventional toggle type mold clamping device described above has the following problems.

第一に、金型を型締用サーボモータの出力トルクで押し付けながらリヤプラテン(圧受盤)を後方に移動させる方式のため、全体の制御が煩雑になるとともに、型厚調整に要する時間が長くなり、作業工数の増加及び生産効率の低下を招く。   First, because the rear platen (pressure platen) is moved backward while pressing the mold with the output torque of the servo motor for clamping, the overall control becomes complicated and the time required for mold thickness adjustment increases. As a result, work man-hours increase and production efficiency decreases.

第二に、本来の型締工程における動作とは大きく異なる動作により型厚調整を行うため、動作の相違に基づく誤差が入り込む余地があり、十分な正確性及び安定性を確保することができない。   Second, because the mold thickness adjustment is performed by an operation that is significantly different from the operation in the original mold clamping process, there is room for errors due to the difference in operation, and sufficient accuracy and stability cannot be ensured.

本発明は、このような背景技術に存在する課題を解決したトグル式型締装置の型厚調整方法の提供を目的とするものである。   An object of the present invention is to provide a mold thickness adjusting method for a toggle type mold clamping device that solves the problems existing in the background art.

本発明に係るトグル式型締装置Mcの型厚調整方法は、圧受盤2を所定の位置へ移動させて型厚調整を行うに際し、トグルリンク機構3を伸長させた状態で圧受盤2を後退位置Xrから高速となる第一速度Vhで前進させ、圧受盤2が金型閉鎖位置Xcに達したなら所定の距離Lsだけ後退させる第一工程T1と、この第一工程後、圧受盤2を低速となる第二速度Vsで前進させ、金型閉鎖位置Xcに達したならトグルリンク機構3を屈曲させて所定の距離Lrだけ型開きを行うとともに、この後、目標の型締力を得る締め代分に相当する距離Lcだけ圧受盤2を前進させる第二工程T2を備えることを特徴とする。   In the mold thickness adjusting method of the toggle type mold clamping device Mc according to the present invention, when the mold thickness adjustment is performed by moving the pressure receiving plate 2 to a predetermined position, the pressure receiving plate 2 is moved backward while the toggle link mechanism 3 is extended. The first step T1 is advanced from the position Xr at a high first speed Vh, and when the pressure receiving plate 2 reaches the mold closing position Xc, the first step T1 is moved backward, and after this first step, the pressure receiving plate 2 is moved. When the die closing position Xc is reached by moving forward at the second speed Vs, which is a low speed, the toggle link mechanism 3 is bent to open the die by a predetermined distance Lr, and thereafter, the clamping is performed to obtain a target clamping force. A second step T2 for advancing the pressure receiving platen 2 by a distance Lc corresponding to the cost is provided.

この場合、発明の好適な態様により、第一工程T1は、圧受盤2が金型閉鎖位置Xcに達したならトグルリンク機構3を屈曲させて所定の距離Lpだけ型開きを行うとともに、この後、圧受盤2を所定の距離Lsだけ後退させた後、トグルリンク機構3を伸長させることができる。また、第二工程T2の締め代分に相当する距離Lcだけ圧受盤2を前進させる速度には、第二速度Vsを用いることができる。なお、第二速度Vsは、第一速度Vhの10〜30〔%〕に設定することができる。さらに、圧受盤2を移動させる駆動源に、減速ギア機構を内蔵するギアードモータ4を使用し、このギアードモータ4を駆動する電源周波数を低くして第二速度Vsを設定することができる。   In this case, according to a preferred aspect of the invention, the first step T1 performs the mold opening by a predetermined distance Lp by bending the toggle link mechanism 3 when the pressure receiving plate 2 reaches the mold closing position Xc. The toggle link mechanism 3 can be extended after the pressure platen 2 is retracted by a predetermined distance Ls. The second speed Vs can be used as the speed at which the pressure receiving platen 2 is moved forward by a distance Lc corresponding to the tightening allowance in the second step T2. The second speed Vs can be set to 10 to 30% of the first speed Vh. Further, a geared motor 4 incorporating a reduction gear mechanism is used as a drive source for moving the pressure receiving platen 2, and the second speed Vs can be set by lowering the power supply frequency for driving the geared motor 4.

このような手法による本発明に係るトグル式型締装置Mcの型厚調整方法によれば、次のような顕著な効果を奏する。   According to the mold thickness adjusting method of the toggle type mold clamping device Mc according to the present invention by such a method, the following remarkable effects are obtained.

(1) 圧受盤2を、後退位置Xrから高速となる第一速度Vhで前進させる第一工程T1を備えるとともに、この第一工程後、設定した僅かな距離Lsだけ低速となる第二速度Vsで前進させる第二工程T2を備えるため、金型をリヤプラテンに当接させた状態でリヤプラテンを移動させる従来の方式とは異なり、型厚調整に要する時間短縮により作業工数の削減及び生産効率の向上を図ることができる。   (1) A first step T1 for moving the pressure receiving plate 2 forward from the reverse position Xr at a first speed Vh that is high speed, and a second speed Vs that is low speed by a set small distance Ls after the first step. Unlike the conventional method in which the rear platen is moved in a state where the mold is in contact with the rear platen because the second step T2 is advanced in the process, the man-hours are reduced and the production efficiency is improved by reducing the time required for adjusting the mold thickness. Can be achieved.

(2) 本来の型締工程における動作とほぼ同じ動作により型厚調整を行うことができるため、動作の相違に基づく誤差の入り込む余地を排除でき、十分な正確性及び安定性を確保することができる。   (2) Since the mold thickness can be adjusted by almost the same operation as in the original mold clamping process, there is no room for errors due to the difference in operation, and sufficient accuracy and stability can be secured. it can.

(3) 好適な態様により、第一工程T1を、圧受盤2が金型閉鎖位置Xcに達したならトグルリンク機構3を屈曲させて所定の距離Lpだけ型開きを行うとともに、この後、圧受盤2を所定の距離Lsだけ後退させた後、トグルリンク機構3を伸長させるようにすれば、圧受盤2を移動させる駆動源に出力トルクの小さいギアードモータ4等を用いた場合であっても、金型閉鎖位置Xcに達した際におけるいわゆる締め込みにより後退できなくなる問題を回避でき、次の動作へ確実に移行させることができる。   (3) According to a preferred embodiment, when the pressure receiving platen 2 reaches the mold closing position Xc, the toggle link mechanism 3 is bent to open the mold by a predetermined distance Lp, and thereafter the pressure receiving plate 2 is opened. If the toggle link mechanism 3 is extended after the board 2 is retracted by a predetermined distance Ls, a geared motor 4 having a small output torque is used as a drive source for moving the pressure receiving board 2. Thus, the problem of being unable to move backward by so-called tightening when reaching the mold closing position Xc can be avoided, and the next operation can be surely shifted.

(4) 好適な態様により、距離Lcだけ圧受盤2を前進させる速度に第二速度Vsを用いれば、正確性の要求される締め代分の設定も高精度に行うことができる。   (4) According to a preferred embodiment, if the second speed Vs is used as the speed at which the pressure receiving platen 2 is moved forward by the distance Lc, the tightening allowance required for accuracy can be set with high accuracy.

(5) 好適な態様により、第二速度Vsを、第一速度Vhの10〜30〔%〕に設定すれば、型厚調整作業の時間短縮と設定される型締力の正確性及び安定性を最適な状態で両立させることができる。   (5) If the second speed Vs is set to 10 to 30% of the first speed Vh according to a preferred embodiment, the time required for the mold thickness adjustment work is shortened and the accuracy and stability of the set clamping force are set. Can be achieved in an optimum state.

(6) 好適な態様により、圧受盤2を移動させる駆動源に、減速ギア機構を内蔵するギアードモータ4を使用し、このギアードモータ4を駆動する電源周波数を低くして第二速度Vsを設定すれば、ギアードモータ4を用いた場合であっても容易に速度切換(速度変更)を行うことができる。   (6) According to a preferred embodiment, a geared motor 4 incorporating a reduction gear mechanism is used as a drive source for moving the pressure receiving platen 2, and the second speed Vs is set by lowering the power supply frequency for driving the geared motor 4. Then, even if the geared motor 4 is used, speed switching (speed change) can be easily performed.

次に、本発明に係る最良の実施形態を挙げ、図面に基づき詳細に説明する。    Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

まず、本実施形態に係る型厚調整方法を実施できるトグル式型締装置Mcの構成について、図2〜図4を参照して説明する。   First, the configuration of a toggle type mold clamping device Mc capable of performing the mold thickness adjusting method according to the present embodiment will be described with reference to FIGS.

図2中、Mで示す射出成形機は、トグル式型締装置Mcと射出装置Miを備える。トグル式型締装置Mcは、離間して配した固定盤21と圧受盤2を備え、固定盤21は不図示の機台上に固定されるとともに、圧受盤2は当該機台上に進退変位可能に支持される。また、固定盤21と圧受盤2間には、四本のタイバー22…を架設する。この場合、各タイバー22…の前端は、固定盤21に固定するとともに、各タイバー22…の後端は、圧受盤2に対して挿通させる。   In FIG. 2, the injection molding machine indicated by M includes a toggle type mold clamping device Mc and an injection device Mi. The toggle type mold clamping device Mc includes a fixed platen 21 and a pressure platen 2 that are spaced apart from each other. The fixed platen 21 is fixed on a machine base (not shown), and the pressure platen 2 moves forward and backward on the machine table. Supported as possible. Further, four tie bars 22 are installed between the fixed platen 21 and the pressure receiving platen 2. In this case, the front ends of the tie bars 22 are fixed to the fixed platen 21 and the rear ends of the tie bars 22 are inserted through the pressure receiving plate 2.

一方、タイバー22…には、可動盤23をスライド自在に装填する。この可動盤23は可動型Cmを支持するとともに、固定盤21は固定型Ccを支持し、可動型Cmと固定型Ccは金型Cを構成する。さらに、圧受盤2と可動盤23間にはトグルリンク機構3を配設する。トグルリンク機構3は、圧受盤2に軸支した一対の第一リンク3a,3aと、可動盤23に軸支した一対の出力リンク3c,3cと、第一リンク3a,3aと出力リンク3c,3cの支軸に結合した一対の第二リンク3b,3bを有し、この第二リンク3b,3bはクロスヘッド24に軸支する。   On the other hand, the movable platen 23 is slidably loaded on the tie bars 22. The movable platen 23 supports the movable mold Cm, the fixed platen 21 supports the fixed mold Cc, and the movable mold Cm and the fixed mold Cc constitute a mold C. Further, a toggle link mechanism 3 is disposed between the pressure receiving plate 2 and the movable platen 23. The toggle link mechanism 3 includes a pair of first links 3a and 3a that are pivotally supported on the pressure receiving plate 2, a pair of output links 3c and 3c that are pivotally supported on the movable plate 23, the first links 3a and 3a, and the output link 3c, A pair of second links 3 b and 3 b coupled to the support shaft of 3 c is provided, and the second links 3 b and 3 b are pivotally supported on the cross head 24.

また、圧受盤2とクロスヘッド24間には型締用駆動部25を配設する。型締用駆動部25は、圧受盤2に回動自在に支持されたボールねじ部26と、このボールねじ部26に螺合し、かつクロスヘッド24に一体に設けたボールナット部27を有するボールねじ機構28を備えるとともに、ボールねじ部26を回転駆動する回転駆動機構部29を備える。回転駆動機構部29は、型締用サーボモータ30と、このサーボモータ30に付設して当該サーボモータ30の回転数を検出するロータリエンコーダ31と、サーボモータ30のシャフトに取付けた駆動ギア32と、ボールねじ部26に取付けた被動ギア33と、この駆動ギア32と被動ギア33間に架け渡したタイミングベルト34を備えている。   A mold clamping drive unit 25 is disposed between the pressure receiving platen 2 and the cross head 24. The mold clamping drive unit 25 includes a ball screw portion 26 that is rotatably supported by the pressure receiving plate 2, and a ball nut portion 27 that is screwed into the ball screw portion 26 and is provided integrally with the cross head 24. A ball screw mechanism 28 is provided, and a rotation drive mechanism 29 that rotates the ball screw 26 is provided. The rotation drive mechanism 29 includes a mold clamping servo motor 30, a rotary encoder 31 attached to the servo motor 30 for detecting the rotation speed of the servo motor 30, and a drive gear 32 attached to the shaft of the servo motor 30. A driven gear 33 attached to the ball screw portion 26 and a timing belt 34 spanned between the drive gear 32 and the driven gear 33 are provided.

これにより、サーボモータ30を作動させれば、駆動ギア32が回転し、駆動ギア32の回転は、タイミングベルト34を介して被動ギア33に伝達され、ボールねじ部26が回転することによりボールナット部27が進退移動する。この結果、ボールナット部27と一体のクロスヘッド24が進退移動し、トグルリンク機構3が屈曲又は伸長し、可動盤23が型開方向(後退方向)又は型閉方向(前進方向)へ進退移動する。   Accordingly, when the servo motor 30 is operated, the drive gear 32 is rotated, and the rotation of the drive gear 32 is transmitted to the driven gear 33 via the timing belt 34, and the ball screw portion 26 is rotated to thereby rotate the ball nut. Part 27 moves forward and backward. As a result, the cross head 24 integrated with the ball nut portion 27 moves forward and backward, the toggle link mechanism 3 bends or extends, and the movable platen 23 moves forward and backward in the mold opening direction (retracting direction) or the mold closing direction (forward movement direction). To do.

他方、圧受盤2には型厚調整装置1を付設する。型厚調整装置1は、四本のタイバー22…の後端側にねじ部36…を形成し、各ねじ部36…にそれぞれ調整ナット37…を螺合してなるボールねじ機構38…を備える。この場合、調整ナット37…は圧受盤2に対するストッパを兼ねている。これにより、各調整ナット37…を回転させれば、ねじ部36…に対して相対変位するため、圧受盤2を進退変位させることができる。   On the other hand, the mold thickness adjusting device 1 is attached to the pressure receiving plate 2. The mold thickness adjusting device 1 includes ball screw mechanisms 38 formed by forming screw portions 36 on the rear end sides of the four tie bars 22 and screwing adjustment nuts 37 to the respective screw portions 36. . In this case, the adjusting nuts 37 also serve as stoppers for the pressure receiving plate 2. Accordingly, when the adjustment nuts 37 are rotated, they are displaced relative to the screw portions 36, so that the pressure receiving platen 2 can be moved back and forth.

また、圧受盤2の側面には、圧受盤2を移動させる駆動源となるギアードモータ4を取付ける。このギアードモータ4は、型厚調整用の駆動モータとなる。ギアードモータ4は、モータ本体部41を備え、このモータ本体部41は、後半部に設けた誘導モータによるモータ部と、前半部に設けることにより当該モータ部の回転が入力する減速ギア機構とを備え、モータ本体部41の前端面には、減速ギア機構の回転が出力する出力シャフト42が突出する。さらに、モータ本体部41の後端面からはモータ部におけるモータシャフトが突出し、このモータシャフトに対して位置をロックし又はロック解除するモータブレーキ部43及びモータシャフトの回転数を検出するロータリエンコーダ部44を付設する。このロータリエンコーダ部44は、インクリメンタルエンコーダを利用し、基準位置に対するエンコーダパルスの発生数により絶対位置の検出を行うことができる。なお、ロータリエンコーダ部44とモータブレーキ部43は、モータ本体部41に対して一体に組付けるため、エンコーダ付サーボモータと同様に全体の小型コンパクト化に寄与できる。   A geared motor 4 serving as a drive source for moving the pressure receiving plate 2 is attached to the side surface of the pressure receiving plate 2. The geared motor 4 serves as a mold thickness adjusting drive motor. The geared motor 4 includes a motor main body 41. The motor main body 41 includes a motor unit using an induction motor provided in the second half, and a reduction gear mechanism for inputting rotation of the motor unit provided in the first half. The output shaft 42 that outputs the rotation of the reduction gear mechanism projects from the front end surface of the motor main body 41. Further, a motor shaft in the motor unit protrudes from the rear end surface of the motor main body 41, a motor brake unit 43 that locks or unlocks the position of the motor shaft, and a rotary encoder unit 44 that detects the rotational speed of the motor shaft. Is attached. The rotary encoder 44 can detect an absolute position based on the number of encoder pulses generated with respect to a reference position using an incremental encoder. In addition, since the rotary encoder part 44 and the motor brake part 43 are assembled | attached integrally with the motor main-body part 41, it can contribute to the whole size reduction compactness similarly to the servomotor with an encoder.

一方、図3及び図4に示すように、出力シャフト42の前端側には、駆動ギア51を取付けるとともに、各調整ナット37…には、それぞれスモールギア52…を一体に取付ける。この場合、各調整ナット37…とスモールギア52…はそれぞれ同軸上に位置する。また、各スモールギア52…及び駆動ギア51に噛合するラージギア53を配設する。ラージギア53は、リング形に形成し、内周面に沿って設けたレール部が圧受盤2に取付けた四つの支持ローラ54…により支持される。即ち、各スモールギア52…は、正方形の四隅位置にそれぞれ配され、かつラージギア53は各スモールギア52…に囲まれる位置に配されるため、各スモールギア52…はラージギア53に対して同時に噛合する。   On the other hand, as shown in FIGS. 3 and 4, a drive gear 51 is attached to the front end side of the output shaft 42, and small gears 52 are integrally attached to the adjustment nuts 37, respectively. In this case, the adjustment nuts 37 and the small gears 52 are coaxially positioned. Further, a large gear 53 that meshes with each small gear 52... And the drive gear 51 is disposed. The large gear 53 is formed in a ring shape, and a rail portion provided along the inner peripheral surface is supported by four support rollers 54 attached to the pressure receiving platen 2. That is, the small gears 52 are arranged at the four corner positions of the square, and the large gears 53 are arranged at positions surrounded by the small gears 52, so that the small gears 52 mesh with the large gears 53 at the same time. To do.

よって、ギアードモータ4を作動させれば、駆動ギア51の回転によりラージギア53が回転するとともに、このラージギア53の回転により各スモールギア52…が同時に回転する。そして、各スモールギア52…と一体に回転する各調整ナット37…がタイバー22…のねじ部36…に沿って進退変位するため、圧受盤2も進退変位し、その前後方向位置が調整される。また、61は、成形機コントローラであり、型締用サーボモータ30,ロータリエンコーダ31,ギアードモータ4,モータブレーキ部43及びロータリエンコーダ部44を接続する。   Therefore, when the geared motor 4 is operated, the large gear 53 is rotated by the rotation of the drive gear 51, and the small gears 52 are simultaneously rotated by the rotation of the large gear 53. Since the adjustment nuts 37 that rotate integrally with the small gears 52 advance and retract along the screw portions 36 of the tie bars 22, the pressure receiving platen 2 also moves forward and backward, and its front-rear direction position is adjusted. . Reference numeral 61 denotes a molding machine controller, which connects the mold clamping servo motor 30, the rotary encoder 31, the geared motor 4, the motor brake unit 43, and the rotary encoder unit 44.

次に、このような型厚調整装置1を用いた本実施形態に係る型厚調整方法について、図1〜図10を参照して説明する。   Next, a mold thickness adjusting method according to this embodiment using such a mold thickness adjusting apparatus 1 will be described with reference to FIGS.

図1は、型厚調整方法の処理手順を示すフローチャートである。なお、型厚調整は、通常、金型Cを交換した際に行われるとともに、型厚調整方法に基づく一連の動作及び処理は自動で行われる。このため、同型厚調整方法を実行するシーケンスプログラムが成形機コントローラ61に設定されており、このシーケンスプログラムに従って型締用サーボモータ30及びギアードモータ4等の動作がシーケンス制御されるとともに、各種処理が実行される。   FIG. 1 is a flowchart showing a processing procedure of the mold thickness adjusting method. The mold thickness adjustment is normally performed when the mold C is replaced, and a series of operations and processes based on the mold thickness adjustment method are automatically performed. For this reason, a sequence program for executing the same mold thickness adjusting method is set in the molding machine controller 61, and the operations of the mold clamping servo motor 30 and the geared motor 4 are sequence-controlled in accordance with this sequence program, and various processes are performed. Executed.

まず、ギアードモータ4を作動制御して圧受盤2を後退位置Xrまで後退させる(ステップS1)。この際の後退速度は、電源周波数の60Hzに基づく通常速度である。また、後退位置Xrでは、型締用サーボモータ30を作動制御してトグルリンク機構3を伸長させた状態(伸長しきった状態)にする(ステップS2)。この状態を図5に示す。なお、この場合、後退位置Xrは最後退位置に設定されるが、トグルリンク機構3を伸長させた状態で可動型Cmと固定型Cc間に所定の隙間が生じればよいため、必ずしも最後退位置である必要はない。   First, the operation of the geared motor 4 is controlled to retract the pressure receiving platen 2 to the retracted position Xr (step S1). The reverse speed at this time is a normal speed based on the power supply frequency of 60 Hz. Further, at the retracted position Xr, the mold clamping servomotor 30 is controlled to be in a state where the toggle link mechanism 3 is extended (a state where it is fully extended) (step S2). This state is shown in FIG. In this case, the retracted position Xr is set to the last retracted position. However, since a predetermined gap may be generated between the movable mold Cm and the fixed mold Cc in a state where the toggle link mechanism 3 is extended, the retracted position Xr is not necessarily the last retracted position. It doesn't have to be a position.

次いで、ギアードモータ4を作動制御し、圧受盤2を、図6に示す矢印Ffp方向へ前進させる(ステップS3)。この場合の前進速度は、高速となる第一速度Vhである。この第一速度Vhは、ギアードモータ4を駆動する電源周波数の60Hzに基づく通常速度となる。そして、金型閉鎖位置Xcに達したなら圧受盤2を停止させる(ステップS4,S5)。この状態を図6に示す。したがって、圧受盤2は、比較的長距離区間となる後退位置Xrから金型閉鎖位置Xcまでの距離Lfを高速となる通常速度(第一速度Vh)で移動することになる。なお、金型閉鎖位置Xcとは、可動型Cmと固定型Ccがタッチする位置であり、例えば、次の方法により検出できる。即ち、金型Cの閉鎖に伴う負荷トルクの変動量を順次検出するとともに、一定移動量に対する負荷トルクの変動率を順次求めることにより、この変動率が予め設定した設定率に達したときの位置を金型閉鎖位置Xcとして検出する。   Next, the operation of the geared motor 4 is controlled, and the pressure receiving platen 2 is advanced in the direction of the arrow Ffp shown in FIG. 6 (step S3). The forward speed in this case is the first speed Vh that is high. The first speed Vh is a normal speed based on the power supply frequency 60 Hz for driving the geared motor 4. When the mold closing position Xc is reached, the pressure receiving platen 2 is stopped (steps S4 and S5). This state is shown in FIG. Therefore, the pressure receiving plate 2 moves at a normal speed (first speed Vh) at a high speed over a distance Lf from the retracted position Xr, which is a relatively long distance section, to the mold closing position Xc. The mold closing position Xc is a position where the movable mold Cm and the fixed mold Cc touch, and can be detected by the following method, for example. That is, the load torque fluctuation amount associated with the closing of the mold C is sequentially detected, and the fluctuation rate of the load torque with respect to the constant movement amount is sequentially obtained, so that the position when the fluctuation rate reaches a preset setting rate. Is detected as the mold closing position Xc.

次いで、型締用サーボモータ30を制御し、トグルリンク機構3を屈曲させることにより、可動盤23を、図7に示す矢印Fr方向へ所定の距離Lpだけ後退させて僅かな型開きを行う(ステップS6)。この型開きは次の理由による。上述したように、圧受盤2を高速となる第一速度Vhで前進させ、金型閉鎖位置Xcにおいて可動型Cmと固定型Ccがタッチした場合、前進移動時の慣性によっていわゆる締め込みが発生し、この後、ギアードモータ4を制御して圧受盤2を後退させようとしても移動できなくなる。特に、運動量と加速度は比例することから、締め込み量(停止するまでの移動量)は、速度の二乗に比例し、高速となる第一速度Vhで移動させた場合、その締め込み量は無視できなくなり、圧受盤2を移動させる駆動源に、出力トルクの小さいギアードモータ4を使用した場合、締め込みを解くことができなくなる。そこで、型締用サーボモータ30を制御し、トグルリンク機構3を屈曲させることにより、締め込みを解くようにした。したがって、この場合、可動盤23を後退させる距離Lpは僅かで足り、数〔mm〕程度、望ましくは、4〔mm〕前後に設定できる。これにより、金型閉鎖位置Xcに達して圧受盤2を停止させた際に、締め込みにより後退できなくなる問題を回避することができ、次の動作へ確実に移行させることができる。   Next, the mold clamping servo motor 30 is controlled to bend the toggle link mechanism 3, whereby the movable platen 23 is retracted by a predetermined distance Lp in the direction of the arrow Fr shown in FIG. Step S6). This mold opening is for the following reason. As described above, when the pressure receiving platen 2 is moved forward at a high first speed Vh and the movable mold Cm and the fixed mold Cc are touched at the mold closing position Xc, so-called tightening occurs due to inertia during forward movement. Thereafter, even if the geared motor 4 is controlled to retract the pressure receiving plate 2, it cannot move. In particular, since the momentum and acceleration are proportional, the amount of tightening (the amount of movement until stopping) is proportional to the square of the speed, and when moving at the first speed Vh that is high, the amount of tightening is ignored. When the geared motor 4 having a small output torque is used as a drive source for moving the pressure receiving platen 2, the tightening cannot be released. Therefore, the mold clamping servo motor 30 is controlled and the toggle link mechanism 3 is bent to release the tightening. Therefore, in this case, the distance Lp for retracting the movable platen 23 is sufficient, and can be set to about several [mm], preferably around 4 [mm]. Thereby, when reaching the mold closing position Xc and stopping the pressure receiving platen 2, it is possible to avoid the problem of being unable to move backward due to tightening, and it is possible to reliably shift to the next operation.

次いで、ギアードモータ4を制御し、圧受盤2を、図7に示す矢印Frp方向へ所定の距離Lsだけ後退させる(ステップS7)。この場合、後退速度は、上述した第一速度Vhを用いることができる。上述したように、高速となる第一速度Vhで前進させた場合、金型閉鎖位置Xcにおいて締め込みが発生するが、この締め込み量は、例えば、型締力設定(調整)時などの誤差及びバラツキの要因となり、型締力の再現性が悪くなるとともに、特に、低い型締力は設定できなくなる。そこで、本実施形態では、第一速度Vhにより金型閉鎖位置Xcに達した圧受盤2を一旦後退させ、この後、微速で再前進させるようにした。したがって、所定の距離Lsは、この処理を実現できる僅かな距離であればよく、数〔mm〕程度、望ましくは、2〔mm〕前後に設定できる。   Next, the geared motor 4 is controlled, and the pressure receiving platen 2 is moved backward by a predetermined distance Ls in the direction of the arrow Frp shown in FIG. 7 (step S7). In this case, the first speed Vh described above can be used as the reverse speed. As described above, when advanced at the first speed Vh, which is a high speed, tightening occurs at the mold closing position Xc. This tightening amount is, for example, an error when setting (adjusting) the mold clamping force. As a result, the reproducibility of the mold clamping force becomes worse, and in particular, a low mold clamping force cannot be set. Therefore, in the present embodiment, the pressure receiving platen 2 that has reached the mold closing position Xc at the first speed Vh is once retracted, and then re-advanced at a slow speed. Therefore, the predetermined distance Ls may be a small distance that can realize this processing, and can be set to about several [mm], preferably around 2 [mm].

また、圧受盤2を所定の距離Lsだけ後退させたなら、型締用サーボモータ30を制御し、トグルリンク機構3を伸長させる(ステップS8)。これにより、可動盤23は、上述した距離Lpと同じ距離だけ矢印Ff方向へ前進する。この状態を図8に示す。したがって、可動型Cmと固定型Cc間には、上述した距離Lsと同じ距離の隙間が生じることになる。以上が第一工程T1となる。この第一工程T1後、以下の第二工程T2が行われる。   If the pressure receiving platen 2 is moved backward by the predetermined distance Ls, the mold clamping servomotor 30 is controlled to extend the toggle link mechanism 3 (step S8). As a result, the movable platen 23 moves forward in the arrow Ff direction by the same distance as the distance Lp described above. This state is shown in FIG. Therefore, a gap having the same distance as the above-described distance Ls is generated between the movable mold Cm and the fixed mold Cc. The above is the first step T1. After the first step T1, the following second step T2 is performed.

第二工程T2では、まず、ギアードモータ4を制御し、圧受盤2を、図9に示す矢印Ffp方向へ前進させる(ステップS9)。この場合の前進速度は、低速となる第二速度Vsである。この第二速度Vsは、第一速度Vhの10〜30〔%〕程度の微速に設定する。即ち、第一速度Vhは、ギアードモータ4を駆動する電源周波数の60Hzに基づいて設定されるため、この電源周波数を低く設定、具体的には6〜18Hz程度、望ましくは10Hz程度に変更する。このように、第二速度Vsを、第一速度Vhの10〜30〔%〕に設定することにより、型厚調整作業に対する時間短縮と設定される型締力に対する正確性及び安定性を最適な状態で両立させることができる。なお、ギアードモータ4を駆動する電源周波数を低くして第二速度Vsを設定することにより、ギアードモータ4を用いた場合であっても容易に速度切換(速度変更)を行うことができる。   In the second step T2, first, the geared motor 4 is controlled to advance the pressure receiving plate 2 in the direction of the arrow Ffp shown in FIG. 9 (step S9). The forward speed in this case is the second speed Vs that is low. The second speed Vs is set to a fine speed of about 10 to 30% of the first speed Vh. That is, since the first speed Vh is set based on the power supply frequency 60 Hz for driving the geared motor 4, this power supply frequency is set to a low value, specifically about 6 to 18 Hz, preferably about 10 Hz. In this way, by setting the second speed Vs to 10 to 30% of the first speed Vh, the time for the mold thickness adjustment work is shortened and the accuracy and stability with respect to the set clamping force are optimized. It is possible to make it compatible with the state. Note that by setting the second speed Vs by lowering the power supply frequency for driving the geared motor 4, speed switching (speed change) can be easily performed even when the geared motor 4 is used.

そして、金型閉鎖位置Xcに達したなら圧受盤2を停止させる(ステップS10,S11)。この状態を図9に示す。したがって、圧受盤2は、比較的短距離区間となる距離Lsを微速で前進することになる。この場合、距離Lsは僅かであるため、微速であっても移動時間は短時間である。また、微速で前進するため、金型閉鎖位置Xcに達した際における衝撃が少なくなり安定な動作が確保されるとともに、特に、前述した締め込み量を大きく低減させることができる。即ち、第二速度Vsは、第一速度Vhの10〜30〔%〕に設定され、締め込み量は速度の二乗に比例することから、1/100〜1/10程度に低減させることができる。この結果、型厚調整により設定される型締力のバラツキは、第一速度Vhのみで行った場合、2〜5〔%〕程度であるのに対して、本実施形態のように、第二速度Vsを加えて行うことにより、0.1〜0.2〔%〕程度まで改善させることができた。   When the mold closing position Xc is reached, the pressure receiving platen 2 is stopped (steps S10 and S11). This state is shown in FIG. Therefore, the pressure platen 2 moves forward at a slow speed over a distance Ls that is a relatively short distance section. In this case, since the distance Ls is small, the moving time is short even at a very low speed. Further, since the vehicle moves forward at a slow speed, the impact when reaching the mold closing position Xc is reduced and a stable operation is ensured, and in particular, the tightening amount described above can be greatly reduced. That is, the second speed Vs is set to 10 to 30% of the first speed Vh, and the tightening amount is proportional to the square of the speed, and can be reduced to about 1/100 to 1/10. . As a result, the variation in the mold clamping force set by the mold thickness adjustment is about 2 to 5% when performed only at the first speed Vh, whereas the second variation as in the present embodiment. By carrying out by adding the speed Vs, it was able to be improved to about 0.1-0.2 [%].

次いで、型締用サーボモータ30を制御し、トグルリンク機構3を屈曲させることにより、可動盤23を、図10に示す矢印Fr方向へ所定の距離Lrだけ後退させて僅かな型開きを行う(ステップS12)。この場合、距離Lrは、後述する締め代分を設定するための移動であり、少なくとも当該締め代分を確保できる距離を選定する。具体的には、前述した距離Lpと同程度の4〔mm〕前後に設定できる。そして、ギアードモータ4を制御し、圧受盤2を、図10に示す矢印Ffp方向へ目標の型締力を得る締め代分に相当する距離Lcだけ前進させる(ステップS13)。この場合の前進速度は、前述した第二速度Vsを用いる。第二速度Vsを用いることにより、正確性の要求される締め代分の設定も高精度に行うことができる。なお、金型閉鎖位置Xcから可動盤23を前進させた際における距離と型締力の関係が予め設定されているため、目標の型締力を得る締め代分に相当する距離Lcを選択することができる。この後、型締用サーボモータ30を制御し、トグルリンク機構3を伸長させることにより、高圧型締を行うことができる。これにより、型厚調整が完了する(ステップS14)。   Next, the mold clamping servo motor 30 is controlled to bend the toggle link mechanism 3 so that the movable platen 23 is retracted by a predetermined distance Lr in the direction of the arrow Fr shown in FIG. Step S12). In this case, the distance Lr is a movement for setting a fastening allowance described later, and a distance that can secure at least the fastening allowance is selected. Specifically, it can be set to about 4 mm, which is about the same as the distance Lp described above. Then, the geared motor 4 is controlled, and the pressure receiving platen 2 is advanced by a distance Lc corresponding to a clamping allowance for obtaining a target mold clamping force in the direction of arrow Ffp shown in FIG. 10 (step S13). The advance speed in this case uses the second speed Vs described above. By using the second speed Vs, it is possible to set the tightening allowance for which accuracy is required with high accuracy. Since the relationship between the distance when the movable platen 23 is moved forward from the mold closing position Xc and the clamping force is set in advance, the distance Lc corresponding to the clamping allowance for obtaining the target clamping force is selected. be able to. Thereafter, by controlling the mold clamping servomotor 30 and extending the toggle link mechanism 3, high-pressure mold clamping can be performed. Thereby, mold thickness adjustment is completed (step S14).

このように、本実施形態に係る型厚調整方法は、圧受盤2を、後退位置Xrから高速となる第一速度Vhで前進させる第一工程T1を備えるとともに、この第一工程後、設定した僅かな距離Lsだけ低速となる第二速度Vsで前進させる第二工程T2を備えるため、金型をリヤプラテンに当接させた状態でリヤプラテンを移動させる従来の方式とは異なり、全体の制御の単純化を図ることができるとともに、型厚調整に要する時間短縮により作業工数の削減及び生産効率の向上を図ることができる。また、本来の型締工程における動作とほぼ同じ動作により型厚調整を行うことができるため、動作の相違に基づく誤差の入り込む余地を排除でき、十分な正確性及び安定性を確保することができる。   As described above, the mold thickness adjusting method according to the present embodiment includes the first step T1 for moving the pressure receiving plate 2 forward from the retreat position Xr at the first speed Vh, and is set after the first step. Unlike the conventional method in which the rear platen is moved in a state in which the mold is in contact with the rear platen because the second step T2 is advanced at the second speed Vs, which is a low speed by a small distance Ls, the overall control is simple. It is possible to reduce the number of work steps and improve the production efficiency by shortening the time required for mold thickness adjustment. In addition, since the mold thickness can be adjusted by substantially the same operation as that in the original mold clamping process, it is possible to eliminate room for errors due to the difference in operation, and to ensure sufficient accuracy and stability. .

以上、最良の実施形態について詳細に説明したが、本発明は、このような実施形態に限定されるものではなく、細部の手法,構成,数値等において、本発明の要旨を逸脱しない範囲で、任意に変更,追加,削除することができる。例えば、第一工程T1において、圧受盤2が金型閉鎖位置Xcに達したならトグルリンク機構3を屈曲させて所定の距離Lpだけ型開きを行うとともに、この後、圧受盤2を所定の距離Lsだけ後退させた後、トグルリンク機構3を伸長させる工程を設けたが、圧受盤2を移動させる駆動源(ギアードモータ4)に大型の高トルク対応のモータを用いるなど、発生する締め込みを解くことができれば、この工程は省略できる。また、圧受盤2を移動させる駆動源にサーボモータを使用する場合には、サーボ制御による第一速度Vh及び第二速度Vsを設定することができる。   As described above, the best embodiment has been described in detail, but the present invention is not limited to such an embodiment, and the details, methods, configurations, numerical values, and the like are within the scope not departing from the gist of the present invention. It can be changed, added, or deleted arbitrarily. For example, in the first step T1, when the pressure receiving plate 2 reaches the mold closing position Xc, the toggle link mechanism 3 is bent to open the mold by a predetermined distance Lp, and thereafter, the pressure receiving plate 2 is moved to the predetermined distance. A step of extending the toggle link mechanism 3 after retreating by Ls is provided, but tightening that occurs, such as using a large high-torque motor for the drive source (geared motor 4) for moving the pressure receiving plate 2, is provided. If it can be solved, this step can be omitted. Moreover, when using a servomotor for the drive source which moves the pressure receiving board 2, the 1st speed Vh and the 2nd speed Vs by servo control can be set.

本発明の最良の実施形態に係る型厚調整方法の処理手順を示すフローチャート、The flowchart which shows the process sequence of the mold thickness adjustment method which concerns on the best embodiment of this invention, 同型厚調整方法を実施できるトグル式型締装置の平面図、A plan view of a toggle type clamping device capable of performing the same mold thickness adjustment method, 同トグル式型締装置に備える型厚調整装置の主要部を示す側面構成図、Side configuration diagram showing the main part of a mold thickness adjusting device provided in the toggle type mold clamping device, 同型厚調整装置の主要部を示す背面構成図、Rear view showing the main part of the same thickness adjustment device, 同型厚調整方法により型厚調整を行う際の処理工程説明図、Explanatory drawing of processing steps when performing mold thickness adjustment by the same mold thickness adjustment method, 同型厚調整方法により型厚調整を行う際の他の処理工程説明図、Other process steps explanatory diagram when performing mold thickness adjustment by the same mold thickness adjustment method, 同型厚調整方法により型厚調整を行う際の他の処理工程説明図、Other process steps explanatory diagram when performing mold thickness adjustment by the same mold thickness adjustment method, 同型厚調整方法により型厚調整を行う際の他の処理工程説明図、Other process steps explanatory diagram when performing mold thickness adjustment by the same mold thickness adjustment method, 同型厚調整方法により型厚調整を行う際の他の処理工程説明図、Other process steps explanatory diagram when performing mold thickness adjustment by the same mold thickness adjustment method, 同型厚調整方法により型厚調整を行う際の他の処理工程説明図、Other process steps explanatory diagram when performing mold thickness adjustment by the same mold thickness adjustment method,

符号の説明Explanation of symbols

2 圧受盤
3 トグルリンク機構
4 ギアードモータ
Mc トグル式型締装置
Xr 後退位置
Xc 金型閉鎖位置
Vh 第一速度
Vs 第二速度
T1 第一工程
T2 第二工程
Ls 距離
Lr 距離
Lc 距離
Lp 距離
2 Pressure receiving plate 3 Toggle link mechanism 4 Geared motor Mc Toggle type clamping device Xr Retraction position Xc Mold closing position Vh 1st speed Vs 2nd speed T1 1st process T2 2nd process Ls distance Lr distance Lc distance Lp distance

Claims (5)

圧受盤を所定の位置へ移動させて型厚調整を行うトグル式型締装置の型厚調整方法において、トグルリンク機構を伸長させた状態で圧受盤を後退位置から高速となる第一速度で前進させ、前記圧受盤が金型閉鎖位置に達したなら所定の距離だけ後退させる第一工程と、この第一工程後、前記圧受盤を低速となる第二速度で前進させ、金型閉鎖位置に達したなら前記トグルリンク機構を屈曲させて所定の距離だけ型開きを行うとともに、この後、目標の型締力を得る締め代分に相当する距離だけ前記圧受盤を前進させる第二工程を備えることを特徴とするトグル式型締装置の型厚調整方法。   In the mold thickness adjustment method of a toggle type mold clamping device that adjusts the mold thickness by moving the pressure receiving plate to a predetermined position, the pressure receiving plate is moved forward at a first speed that is higher than the retracted position with the toggle link mechanism extended. A first step of retracting the pressure receiving plate by a predetermined distance when the pressure receiving plate reaches the mold closed position, and after the first step, the pressure receiving plate is advanced at a second speed that is a low speed to reach the mold closed position. If it has reached, the toggle link mechanism is bent to open the mold by a predetermined distance, and thereafter, the second step of advancing the pressure receiving plate by a distance corresponding to a clamping allowance for obtaining a target mold clamping force is provided. A mold thickness adjusting method for a toggle type mold clamping device. 前記第一工程は、前記圧受盤が金型閉鎖位置に達したなら前記トグルリンク機構を屈曲させて所定の距離だけ型開きを行うとともに、この後、前記圧受盤を所定の距離だけ後退させた後、前記トグルリンク機構を伸長させることを特徴とする請求項1記載のトグル式型締装置の型厚調整方法。   In the first step, when the pressure receiving plate reaches the mold closing position, the toggle link mechanism is bent to open the mold by a predetermined distance, and thereafter, the pressure receiving plate is moved backward by a predetermined distance. 2. The mold thickness adjusting method for a toggle type mold clamping apparatus according to claim 1, wherein the toggle link mechanism is extended afterwards. 前記第二工程の前記締め代分に相当する距離だけ前記圧受盤を前進させる速度は、前記第二速度を用いることを特徴とする請求項1記載のトグル式型締装置の型厚調整方法。   2. The mold thickness adjusting method for a toggle type mold clamping apparatus according to claim 1, wherein the second speed is used as a speed at which the pressure receiving plate is advanced by a distance corresponding to the clamping allowance in the second step. 前記第二速度は、前記第一速度の10〜30〔%〕に設定することを特徴とする請求項1又は3記載のトグル式型締装置の型厚調整方法。   The mold thickness adjusting method for a toggle type mold clamping apparatus according to claim 1 or 3, wherein the second speed is set to 10 to 30% of the first speed. 前記圧受盤を移動させる駆動源に、減速ギア機構を内蔵するギアードモータを使用し、このギアードモータを駆動する電源周波数を低くして前記第二速度を設定することを特徴とする請求項1記載のトグル式型締装置の型厚調整方法。   2. A geared motor having a built-in reduction gear mechanism is used as a drive source for moving the pressure platen, and the second speed is set by lowering a power supply frequency for driving the geared motor. Mold thickness adjusting method for toggle type mold clamping device.
JP2004194249A 2004-06-30 2004-06-30 Mold thickness adjustment method for toggle type mold clamping device Expired - Lifetime JP4313259B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007301873A (en) * 2006-05-12 2007-11-22 Nissei Plastics Ind Co Method of clamping injection molding machine
CN104139494A (en) * 2014-08-01 2014-11-12 江文中 Full automatic shoe mold mechanical arm device
CN104139493A (en) * 2014-08-01 2014-11-12 江文中 Full automatic shoe mold mechanical arm mechanism
CN114007836A (en) * 2019-07-04 2022-02-01 芝浦机械株式会社 Injection molding machine and control method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007301873A (en) * 2006-05-12 2007-11-22 Nissei Plastics Ind Co Method of clamping injection molding machine
JP4643489B2 (en) * 2006-05-12 2011-03-02 日精樹脂工業株式会社 Clamping method of injection molding machine
CN104139494A (en) * 2014-08-01 2014-11-12 江文中 Full automatic shoe mold mechanical arm device
CN104139493A (en) * 2014-08-01 2014-11-12 江文中 Full automatic shoe mold mechanical arm mechanism
CN114007836A (en) * 2019-07-04 2022-02-01 芝浦机械株式会社 Injection molding machine and control method thereof

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