JPH01314128A - Motor driven mold clamping device of injection molding machine and its driving control method - Google Patents
Motor driven mold clamping device of injection molding machine and its driving control methodInfo
- Publication number
- JPH01314128A JPH01314128A JP14454588A JP14454588A JPH01314128A JP H01314128 A JPH01314128 A JP H01314128A JP 14454588 A JP14454588 A JP 14454588A JP 14454588 A JP14454588 A JP 14454588A JP H01314128 A JPH01314128 A JP H01314128A
- Authority
- JP
- Japan
- Prior art keywords
- die plate
- mold
- mold clamping
- servo motor
- nut member
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001746 injection moulding Methods 0.000 title claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000465 moulding Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、合成樹脂の二次成形に使用される射出成形
機及び射出プレス成形機（型締めの直前に金型内へ溶融
樹脂を注入し定量充填してから高推力の型締めを行ない
プレスする工程を含む成形機。但し、以下は射出成形機
で代表する。）に係り、さらにいえば、電動機を動力源
とし金型の開閉及び型締めを行なう電動式型締め装置と
その駆動制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to injection molding machines and injection press molding machines used for secondary molding of synthetic resins (injection molding machines and injection press molding machines that inject molten resin into the mold immediately before mold clamping and Molding machines that include filling, then high-thrust mold clamping, and pressing.However, the following is representative of injection molding machines), and more specifically, it is a molding machine that uses an electric motor as a power source to open and close the mold and clamp the mold. The present invention relates to an electric mold clamping device and its drive control method.
従来の技術
電動機（サーボモータを含む）を動力源とする電動式型
締め装置は、既に種々公知に属する（例えば特開昭５８
−６２０３０号、特開昭５８−１７９６３０号、特開昭
６１−２４６０３２号公報などに記載されている）。Conventional technology Electric mold clamping devices using electric motors (including servo motors) as a power source are already known in various ways (for example, Japanese Patent Laid-Open No. 58
-62030, JP-A-58-179630, JP-A-61-246032, etc.).
■ 特開昭５８−６２０３０号及び特開昭５８−１７９
６３０号公報には、サーボモータで回転される回転軸の
途中位置にクラッチを設置し、固定盤に設置したナツト
部材と前記回転軸とは増速比の歯車列で連結され、ナツ
ト部材にねじ込まれたねじ軸の先端部に移動側ダイプレ
ートを取付け、射出装置の駆動をも兼ねた１台の電動機
で駆動される電動式型締め装置が記載されている。■ JP-A-58-62030 and JP-A-58-179
No. 630 discloses that a clutch is installed in the middle of a rotating shaft rotated by a servo motor, a nut member installed on a fixed plate and the rotating shaft are connected by a gear train with a speed increasing ratio, and the clutch is screwed into the nut member. An electric mold clamping device is described in which a movable die plate is attached to the tip of a screw shaft, and the mold clamping device is driven by a single electric motor that also serves as a drive for an injection device.
■ 特開昭６１−２４６０３２号公報には、固定盤にポ
ールナツト部材を回転のみ自在に設置し、このナツト部
材にねじ込まれたポールねじ軸の先端部は移動側ダイプ
レートに対して軸方向の推力を伝達でき、かつ回転自在
に取付けてあり、ボールナツト部材及びポールねじ軸を
それぞれ個別に専用のサーボモータ２台で独立に駆動し
、又は両者を１台のサーボモータで共通に回転駆動する
構成の電動式型締め装置が記載されている。■ Japanese Patent Application Laid-Open No. 61-246032 discloses that a pole nut member is installed on a stationary plate so that it can only rotate freely, and the tip of the pole screw shaft screwed into this nut member applies an axial thrust to the moving die plate. It is configured such that the ball nut member and the pole screw shaft can be driven individually by two dedicated servo motors, or both can be rotationally driven in common by one servo motor. An electric mold clamping device is described.
本発明が解決しようとする課題
（Ｉ） 射出成形機の型締め装置に関しては、溶融樹
脂の射出時に射出樹脂圧力によって一対の金型が開くの
を防ぐため、高推力の型締めが要求される。ところが、
成形品取出しのための金型開閉時には、生産性向上のた
めに、できるだけ高速移動させることが要求される。し
かし、電動機の回転速度−トルク特性として、高速化と
高推力化とは相反する。このため特開昭５８−６２０３
０号及び特開昭５８−１７９６３０号公報に記載された
電動式型締め装置のように１台の電動機で駆動する方式
の場合は、高速回転をして、しかも型締め用の高トルク
を出力する電動機（サーボモータ）を使用せざるを得な
い、したがって、電動機には大型大出力のサーボモータ
を選択使用せざるを得す、よって非常に高価なものとな
っている。Problem to be solved by the present invention (I) Regarding the mold clamping device of an injection molding machine, high thrust mold clamping is required to prevent a pair of molds from opening due to the pressure of the injection resin during injection of molten resin. . However,
When opening and closing the mold to take out the molded product, it is required to move as fast as possible to improve productivity. However, as for the rotational speed-torque characteristics of an electric motor, increasing the speed and increasing the thrust are contradictory. For this reason, JP-A-58-6203
In the case of a system driven by a single electric motor, such as the electric mold clamping device described in No. 0 and Japanese Patent Application Laid-Open No. 58-179630, it rotates at high speed and outputs high torque for mold clamping. Therefore, a large-sized, high-output servo motor must be selectively used as the motor, making it very expensive.
このような理由で、当該型締め装置は大型射出成形機に
は採用されておらず、もっばら小型機に実施されている
のが実情である。For these reasons, the mold clamping device is not used in large injection molding machines, but is actually used mostly in small machines.
（■） この点、特開昭６１−２４６０３２号公報に記
載された電動式型締め装置は、高速型開閉用と高推力の
型締め用とをモータ及び伝達機構を切替え使用すること
によって解決している。しかし、減速比が異なる２系統
の歯車式減速機構が必要であり、その分組立てが面倒で
あるし、製作コストも高くつく、一方、ポールねじ機構
には、その高速回転の限界、即ち限界回転数（速度限界
又は許容限度回転数とも云う）があることは良く知られ
た事実であり、よって当該型締め装置の開閉速度の高速
化にも限りがある０例えばポールねじの限界回転数の２
倍の開閉速度を実現することなどはとうてい不可能であ
り、この点が解決すべき課題となっている。(■) The electric mold clamping device described in JP-A-61-246032 solves this problem by switching the motor and transmission mechanism for high-speed mold opening/closing and high-thrust mold clamping. ing. However, two systems of gear type reduction mechanisms with different reduction ratios are required, which makes assembly difficult and increases production costs.On the other hand, the pole screw mechanism has a limit of its high speed rotation It is a well-known fact that there is a certain number (also called speed limit or permissible rotation speed limit), and therefore there is a limit to increasing the opening/closing speed of the mold clamping device.For example, there is a limit of 2.
It is simply impossible to double the opening and closing speed, and this is an issue that must be resolved.
（■） したがって、本発明の目的は、減速機構や長い
回転軸（伝動軸）などは−切無用で、例えばポールねじ
の限界回転数を超えることなくその２倍の開閉速度（倍
速移動）も実現可使であり、それでいてねじ軸の現実の
リード角以下に匹敵する高推力の型締めを行なえる構成
に改良した電動式型締め装置及びその駆動制御方法を提
供することにある。(■) Therefore, the purpose of the present invention is to eliminate the need for reducing speed reduction mechanisms and long rotating shafts (transmission shafts), and for example, to open and close at double the speed (double speed movement) without exceeding the limit rotation speed of a pole screw. It is an object of the present invention to provide an electric mold clamping device and a drive control method thereof, which are operable and have an improved structure capable of performing mold clamping with a high thrust equal to or less than the actual lead angle of a screw shaft.
課題を解決するための手段
（第１の発明）
上記従来技術の課題を解決するための手段として、この
発明に係る射出成形機の電動式型締め装置は、図面に実
施例を示したとおり。Means for Solving the Problems (First Invention) As a means for solving the problems of the above-mentioned prior art, an electric mold clamping device for an injection molding machine according to the present invention is provided as an example shown in the drawings.
固定盤又はダイプレートにナツト部材を回転のみ可能に
設置し、このナツト部材を電動機で回転し、ナツト部材
にねじ込まれたねじ軸を介して金型の開閉及び高推力の
型締めを行なう電動式型締め装置において、
固定側ダイプレートｌ及び移動側ダイプレート２の双方
にナツト部材４．４′を回転のみ可能に設置し、双方の
ナツト部材４．４′にねじ軸３を共通にねじ込んでこれ
をタイバーとなし、それぞれのナツト部材４．４′には
個別に専用のサーボモータ９．９′を回転動力の伝達が
可能に例えばベルト伝動機構により直結した。そして、
これら２基のサーボモータ９．９′の単独又は共同の運
転により金型の開閉又は高推力の型締めを行なう構成と
した。An electric type in which a nut member is installed on a fixed platen or die plate so that it can only rotate, and this nut member is rotated by an electric motor to open and close the mold and perform high-thrust mold clamping via a screw shaft screwed into the nut member. In the mold clamping device, nut members 4.4' are installed on both the stationary die plate l and the movable die plate 2 so as to be rotatable, and the screw shaft 3 is commonly screwed into both nut members 4.4'. This was used as a tie bar, and a dedicated servo motor 9.9' was directly connected to each nut member 4.4' by, for example, a belt transmission mechanism to enable transmission of rotational power. and,
The structure is such that the mold is opened and closed or the mold is clamped with high thrust by operating these two servo motors 9 and 9' individually or in combination.
作 用
ねじ軸３がタイバーになっているので、固定側ダイプレ
ー）１又は移動側ダイプレート２のいずれのナツト部材
４又は４′を回転した場合にも、ねじ軸３とのねじ運動
により、移動側ダイプレート２は開閉移動をする。一方
のナツト部材４又は４′のみを回転したときは半速移動
（後記倍速移動の％速度の移動という意味、以下同じ）
であり、双方のナツト部材４．４′を同時に相反する方
向に回転したときは倍速移動となる。この倍速移動時に
おいても、ナツト部材４．４′の回転速度はポールねじ
の限界回転数以下に保てる。また、二つのナツト部材４
．４′を同一方向に若干の速度差で回転すると、移動側
ダイプレート２の移動量は前記速度差分となり、実質ね
じリード角以下の移動量となり、よって高推力の型締め
が行なえるのである。Since the working screw shaft 3 is a tie bar, when either the nut member 4 or 4' of the stationary die plate 1 or the movable die plate 2 is rotated, the screw movement with the screw shaft 3 will cause the movement. The side die plate 2 moves to open and close. When only one nut member 4 or 4' is rotated, half-speed movement (means % speed movement of double-speed movement described later, the same applies hereinafter)
Therefore, when both nut members 4,4' are rotated simultaneously in opposite directions, the movement becomes double speed. Even during this double speed movement, the rotational speed of the nut member 4.4' can be kept below the limit rotational speed of the pole screw. In addition, two nut members 4
．． 4' are rotated in the same direction with a slight speed difference, the amount of movement of the movable die plate 2 is equal to the speed difference, and the amount of movement is substantially less than the screw lead angle, so that mold clamping can be performed with a high thrust.
（第２、第３の発明）
同じ〈従来技術の課題を解決するための手段として、こ
の発明に係る射出成形機の電動式型締め装置の駆動制御
方法は、上記第１の発明に係る電動式型締め装置の型開
閉移動及び型締め工程として実施される駆動制御方法で
あり、即ち、固定側ダイプレートｌ及び移動側ダイプレ
ート２の双方にナツト部材４，４′を回転のみ可能に設
置し、これら双方のナツト部材４．４′に共通にねじ込
まれたねじ軸３をタイバーとなし、固定側ダイプレート
１及び移動側ダイプレート２それぞれのナツト部材４，
４′には個別に専用のサーボモータ９．９′を回転動力
の伝達が可能に例えばベルト伝動機構によって直結し、
ナツト部材４．４′をサーボモータ９，９′で回転しね
じ軸３を介して金型の開閉及び高推力の型締めを行なう
電動式型締め装置において、
金型の開閉工程は一方（例えば固定側）のサーボモータ
９を正転駆動し、他方（移動側）のサーボモータ９′を
逆転駆動することにより倍速移動で行なう、型締め直前
には一方（固定側）のサーボモータ９を停止し、半速移
動で低推力の型閉じを行なう。型締め工程は双方のサー
ボモータ９゜９′をそれぞれ若干の速度差で同一方向に
駆動することにより高推力の型締めを行なうか、あるい
は型締め直前に双方のサーボモータ９．９′を若干の速
度差で同一方向に駆動することによりそのまま高推力の
型閉じ、型締めを行なうことを特徴とする特
作 用
一方（固定側）のサーボモータ９を正転させると、固定
側ダイプレートｌに対してねじ軸３が例えばＡ矢印方向
へ直進移動する。他方（移動側）のサーボモータ９′を
逆転させると、ねじ軸３に対して移動側ダイプレート２
がねじ軸３の前記直進移動と同一方向に移動する。従っ
て、この二つの動作を同時に行なわせると、移動側ダイ
プレート２の実質移動速度は２倍（倍速移動）となり、
倍速の型開閉が行なわれる。(Second and Third Inventions) As a means for solving the same problems of the prior art, a drive control method for an electric mold clamping device for an injection molding machine according to the present invention is a method for controlling the drive of an electric mold clamping device according to the first invention. This is a drive control method carried out during the mold opening/closing movement and mold clamping process of a type mold clamping device, that is, the nut members 4 and 4' are installed on both the stationary die plate 1 and the movable die plate 2 so that they can only rotate. The screw shaft 3 commonly screwed into both of these nut members 4 and 4' serves as a tie bar, and the nut members 4 and 4 of each of the stationary die plate 1 and the movable die plate 2 are connected to each other.
A dedicated servo motor 9.9' is directly connected to 4', for example, by a belt transmission mechanism, so that rotational power can be transmitted.
In an electric mold clamping device in which the nut members 4 and 4' are rotated by servo motors 9 and 9' to open and close the mold and clamp the mold with high thrust via the screw shaft 3, the mold opening and closing process is performed on one side (e.g. The servo motor 9 on the fixed side is driven in the forward direction, and the other servo motor 9' on the moving side is driven in the reverse direction to perform double-speed movement. Immediately before mold closing, the servo motor 9 on the one side (the fixed side) is stopped. Then, close the mold with low thrust by moving at half speed. In the mold clamping process, high thrust mold clamping is performed by driving both servo motors 9.9' in the same direction with a slight speed difference, or just before mold clamping, both servo motors 9.9' are driven slightly in the same direction. This special feature is characterized in that it closes the mold with high thrust and clamps the mold by driving in the same direction with a speed difference of In contrast, the screw shaft 3 moves straight in the direction of arrow A, for example. When the other (moving side) servo motor 9' is reversed, the moving side die plate 2
moves in the same direction as the linear movement of the screw shaft 3. Therefore, if these two operations are performed simultaneously, the actual moving speed of the moving die plate 2 will be doubled (double speed movement).
The mold opens and closes at double speed.
型閉じ直前に、一方（固定側）のサーボモータ９を停止
すると、移動側ダイプレート２は残る他方のサーボモー
タ９′の回転に基く速度（前記倍速移動に対し展の速度
、以下これを半速移動という）で低推力の型閉じが行な
われる。When one (fixed side) servo motor 9 is stopped immediately before the mold closes, the movable die plate 2 moves at a speed based on the rotation of the other remaining servo motor 9' (the speed of expansion compared to the double speed movement, hereinafter referred to as half this). (referred to as high-speed movement), the mold is closed with low thrust.
型閉じの直前に、又は型締めに際して双方のサーボモー
タ９，９′を若干の速度差で同一方向に逆転駆動すると
、移動側ダイプレート２は前記速度差相当分の移動量（
厳密には０以上でねじ軸３のリード角以下）で移動する
ことになり、反比例的に高推力が発生し高推力の型締め
が行なわれるのである。When both servo motors 9 and 9' are reversely driven in the same direction with a slight speed difference immediately before mold closing or during mold clamping, the movable die plate 2 moves an amount corresponding to the speed difference (
Strictly speaking, the movement is greater than 0 and less than the lead angle of the screw shaft 3), and a high thrust is generated inversely proportionally, resulting in high thrust mold clamping.
実施例
次に、第１図〜第３図に示した本発明の詳細な説明する
。EXAMPLE Next, the present invention shown in FIGS. 1 to 3 will be described in detail.
図中１が固定側ダイプレートで、２が移動側ダイプレー
トであり、両者は成形機ベース１２上で相対峙する配置
に設置されている。移動側ダイプレート２は、成形機ベ
ース１２の上面に設置した摺動用ガイド１１の上に乗り
（第２図）、固定側ダイプレート１に向って接近し又は
遠のく平行移動をするものとされている。金型の図示は
省略した。In the figure, 1 is a stationary die plate, and 2 is a movable die plate, both of which are placed facing each other on the molding machine base 12. The movable die plate 2 rides on a sliding guide 11 installed on the upper surface of the molding machine base 12 (Fig. 2), and moves in parallel toward or away from the fixed die plate 1. There is. Illustration of the mold was omitted.
上記固定側ダイプレートｌ及び移動側ダイプレート２の
タイバー取付は位置には、スラスト兼用の玉軸受１３に
よって回転筒６．６′を回転のみ自在に、即ち型締め力
ぐらいの推力を受けても軸方向には決して動かない状態
に設置されている。そして１回転筒６．６の外側端部に
、ポールナツト部材４．４′が、ボルト止め等の方法で
一体的に回転するように取付けられている。前記双方の
ナツト部材４．４′にはポールねじとして形成したねじ
軸３がポール１４を介して共通にねじ込まれ、タイバー
として働くように構成されている。各ねじ軸３・・・の
移動ダイプレート２側の端部には、第２図のように井桁
状の固定板１０をナツト止めの方法で取付け、もってね
じ軸３は回転しないように固定されている。The tie bars of the stationary die plate l and the movable die plate 2 are mounted in such a position that the rotary cylinder 6, 6' can only be rotated freely by the ball bearing 13 which also serves as thrust, that is, even when receiving a thrust equal to the mold clamping force. It is installed so that it never moves in the axial direction. A pole nut member 4.4' is attached to the outer end of the one-rotation tube 6.6 by bolting or the like so that it rotates integrally therewith. A screw shaft 3 formed as a pawl screw is commonly screwed into both nut members 4,4' through a pawl 14, and is configured to function as a tie bar. At the end of each screw shaft 3 on the movable die plate 2 side, a fixed plate 10 in the form of a grid is attached with a nut as shown in FIG. ing.
各ナツト部材４，４′の外周にはベルト車５゜５′が一
体的に回転するように取付けられている。特に第２図の
ように移動側ダイプレート２側の各ベルト車５′・・・
へ一連に巻掛けたベルト（タイミングベルトを含む）８
′は、移動側ダイプレート２の下部に取付は固定したサ
ーボモータ９′の原動ベルト車７′にも共通に巻掛け、
もってこのサーボモータ９′で直接的に各ナツト部材４
′を同一方向に同一速度で回転駆動する構成とされてい
る。A belt pulley 5.degree. 5' is attached to the outer periphery of each nut member 4, 4' so as to rotate integrally therewith. In particular, as shown in Fig. 2, each belt pulley 5' on the moving side die plate 2 side...
A series of belts (including timing belt) wrapped around 8
' is also commonly wrapped around the drive belt pulley 7' of the servo motor 9' which is fixedly attached to the lower part of the moving die plate 2.
Therefore, the servo motor 9' directly drives each nut member 4.
' are configured to rotate in the same direction at the same speed.
こうしてサーボモータ９′が正転しナツト部材４′が正
転されると、右端部をナツト部材４で固定側グイプレー
）１へ軸方向へは移動しないように固定されたねじ軸３
とのねじ運動により、相対的に移動側ダイプレート２が
第１図の矢印Ｂ′方向に型開き移動をする。逆に、同サ
ーボモータ９′を逆転させると、移動側ダイプレート２
は矢印Ａ′方向に型閉じ移動をする。In this way, when the servo motor 9' rotates forward and the nut member 4' rotates forward, the right end of the screw shaft 3 is fixed so that it does not move in the axial direction toward the fixed side guide 1 by the nut member 4.
Due to the screw movement between the die plate 2 and the movable die plate 2, the movable die plate 2 relatively moves in the direction of arrow B' in FIG. Conversely, when the servo motor 9' is reversed, the moving die plate 2
moves in the direction of arrow A' to close the mold.
他方、固定側ダイプレートｌ側のナツト部材４へ取付け
たベルト車５・・・へ一連に巻掛けたベルト（タイミン
グベルトを含む）８は、成形機ベース１２上に設置した
サーボモータ９の原動ベルト車７にも共通に巻掛け、も
ってこのサーボモータ９で直接的に各ナツト部材４・・
・を同一方向に同一速度で回転駆動する構成とされてい
る。即ち、サーボモータ９が正転し、ナツト部材４が正
転されると、ねじ軸３とのねじ運動により、ねじ軸３は
第１図の矢印Ａ方向に直進移動する。したがって、移動
側ダイプレート２のナツト部材４′が停止されている場
合、ねじ軸３の前記直進移動により、移動側ダイプレー
ト２は型閉じ移動をする。逆に、同サーボモータ９が逆
転されると、ねじ軸３は矢印Ｂ方向に直進移動し、移動
側ダイプレート２は型開き移動をするのである。したが
って、要約すると次のような動作及び組合せが成立する
。On the other hand, a belt (including a timing belt) 8, which is wound in series around a belt pulley 5 attached to a nut member 4 on the fixed die plate L side, is a driving force of a servo motor 9 installed on a molding machine base 12. It is also commonly wound around the belt pulley 7, and the servo motor 9 directly connects each nut member 4...
・It is configured to rotate in the same direction at the same speed. That is, when the servo motor 9 rotates normally and the nut member 4 rotates normally, the screw shaft 3 moves straight in the direction of arrow A in FIG. 1 due to the screw movement with the screw shaft 3. Therefore, when the nut member 4' of the movable die plate 2 is stopped, the movable die plate 2 moves to close the mold due to the linear movement of the screw shaft 3. Conversely, when the servo motor 9 is reversed, the screw shaft 3 moves straight in the direction of arrow B, and the movable die plate 2 moves to open the mold. Therefore, in summary, the following operations and combinations are established.
上記■又は■のケースによれば、サーボモータ９又は９
′を単独で運転すると、移動側ダイプレート２はポール
ねじの限界回転数の範囲内で半速の型閉じ又は型開き移
動をすることになる。According to the case of ■ or ■ above, the servo motor 9 or 9
When ' is operated alone, the movable die plate 2 moves at half speed to close or open the mold within the limit rotational speed of the pole screw.
上記■又は■のケースによれば、サーボモータ９又は９
′はナツト部材４又は４′をポールねじの限界回転数で
回転させると、移動側ダイプレート２は双方のねじ運動
が合成された結果として２倍の倍速移動で型閉じ又は型
開き移動をすることになる。According to the case of ■ or ■ above, the servo motor 9 or 9
When the nut member 4 or 4' is rotated at the limit rotation speed of the pole screw, the movable die plate 2 moves at twice the speed to close or open the mold as a result of the combination of both screw movements. It turns out.
上記■又は■のケースによれば、仮にサーボモータ９及
び９′の回転速度が同一であると、移動側ダイプレート
２は双方のねじ運動が合成された結果、相対速度が０と
なり実質移動はしない。According to the above case (■) or (■), if the rotation speeds of the servo motors 9 and 9' are the same, the relative speed of the moving die plate 2 will be 0 as a result of the combination of both screw movements, and there will be no actual movement. do not.
しかし、サーボモータ９と９′に若干の速度差を設定す
ると、速度の絶対値が大きい方向に微小速度で移動する
０例えば、上記■のケースでは矢印Ａ方向の移動速度を
若干大きくし、■のケースでは矢印Ａ′の移動速度を若
干大きくすると、その速度差分だけ移動側ダイプレート
２が型閉じ方向に移動し、ねじ軸３のリード角がＯ〜リ
ード角分の範囲で高推力を発生し型締めが行なわれる。However, if a slight speed difference is set between the servo motors 9 and 9', the servo motors 9 and 9' will move at a very small speed in the direction where the absolute value of the speed is large. In the case of , when the moving speed of arrow A' is slightly increased, the moving die plate 2 moves in the mold closing direction by that speed difference, and a high thrust is generated in the range of the lead angle of the screw shaft 3 from O to the lead angle. Mold clamping is performed.
したがって、金型の開閉工程は、上記■又は■のケース
で示したように、例えば一方のサーボモータ９を正転駆
動し、他方のサーボモータ９′を逆転駆動する（又はそ
の正反対とする）ことにより倍速移動で行ない、型締め
直前には上記■又は■のケースのように一方のサーボモ
ータ９（又は９′）を停止して半速移動で低推力の型閉
じを行ない、型締め工程は上記■又は■のケースのよう
に双方のサーボモータ９と９′を若干の速度差で正・逆
転駆動することにより高推力の型締めを行なうことがで
きる。Therefore, in the opening/closing process of the mold, for example, one servo motor 9 is driven in the forward direction and the other servo motor 9' is driven in the reverse direction (or in the opposite direction). Immediately before mold closing, one servo motor 9 (or 9') is stopped and the mold is closed with low thrust at half speed, as in case ① or ① above, and the mold closing process is performed by moving at double speed. In this case, mold clamping with a high thrust can be performed by driving both servo motors 9 and 9' in forward and reverse directions with a slight speed difference, as in case 1 or 2 above.
あるいはまた、型締めの直前にいきなり上記■又は■の
ケースのように双方のサーボモータ９と９′を若干の速
度差で正逆転駆動し、高推力の型閉じ及び型締めを行な
うこともできる。Alternatively, just before mold clamping, both servo motors 9 and 9' can be driven in forward and reverse directions with a slight speed difference, as in case ① or ■ above, to perform mold closing and clamping with high thrust. .
なお、上記実施例の構成におけるベルト８゜８′とベル
ト車７．７′及び５．５′は、例えばチェ７とスプロケ
ット等の構成に置き換えて同様に実施することができる
。It should be noted that the belt 8.8' and the belt pulleys 7.7' and 5.5' in the configuration of the above embodiment can be replaced with, for example, a chain 7 and a sprocket.
本発明が奏する効果
以上に実施例と併せて詳述したとおりであって、この発
明に係る射出成形機の電動式型締め装置及びその駆動制
御方法によれば、第一に、変速ギヤー等の減速装置を使
用することなく、型開閉を高速から低速までを自由自在
に選択でき、しかも、高推力による型締めができる。特
にポールねじに固有の限界回転数の範囲内で移動側ダイ
プレート２に倍速移動をさせて高速化を図ることができ
る。As described in detail in conjunction with the embodiments, the effects of the present invention are as follows.According to the electric mold clamping device for an injection molding machine and its drive control method according to the present invention, firstly, the transmission gear, etc. The mold opening/closing speed can be freely selected from high to low without using a reduction gear, and the mold can be clamped with high thrust. In particular, the movable die plate 2 can be moved at double speed within the limit rotation speed specific to the pole screw to increase the speed.
第二に、ポールねじのリード角に左右されることなく、
リード角以下の内容で高推力を発生させることができ、
サーボモータ９．９′の小型化とコスト低減が図れる。Second, regardless of the lead angle of the pole screw,
It is possible to generate high thrust with content less than the lead angle,
The size and cost of the servo motor 9,9' can be reduced.
こうして型締め装置の製造コストを低減させると共に金
型開閉速度の高速化を図ることにより、さらに生産性向
上に寄与する効果も得られるのである。In this way, by reducing the manufacturing cost of the mold clamping device and increasing the mold opening/closing speed, it is possible to obtain effects that further contribute to improved productivity.
第１図は本発明に係る射出成形機の要部を一部破断して
示した正面図、第２図と第３図は同前の左右の側面図で
ある。
ｌ・・・固定側ダイプレート
２・・・移動側ダイプレート ３・・・ねじ軸４
、 ４ ′ ・・・ す ン ト ８Ｂ 材９．９
′・・・サーボモータ ７．５・・・ベルト車８・・
・ベルト
第２図
第３図FIG. 1 is a partially cutaway front view of an injection molding machine according to the present invention, and FIGS. 2 and 3 are left and right side views of the same. l... Fixed side die plate 2... Moving side die plate 3... Screw shaft 4
, 4'...Stone 8B Material 9.9
'...Servo motor 7.5...Belt wheel 8...
・Belt Figure 2 Figure 3
Claims (1)
可能に設置し、このナット部材を電動機で回転し、ナッ
ト部材にねじ込まれたねじ軸を介して金型の開閉及び高
推力の型締めを行なう電動式型締め装置において、 固定側ダイプレート及び移動側ダイプレートの双方にナ
ット部材を回転のみ可能に設置し、双方のナット部材に
ねじ軸を共通にねじ込んでこれをタイバーとなし、それ
ぞれのナット部材には個別に専用のサーボモータを回転
動力の伝達が可能に直結してあり、これら２基のサーボ
モータの単独又は共同の運転により金型の開閉又は高推
力の型締めを行なうことを特徴とする、射出成形機の電
動式型締め装置。 【２】固定側ダイプレート及び移動側ダイプレートの双
方にナット部材を回転のみ可能に設置し、これら双方の
ナット部材に共通にねじ込まれたねじ軸をタイバーとな
し、固定側ダイプレート及び移動側ダイプレートそれぞ
れのナット部材には個別に専用のサーボモータを回転動
力の伝達が可能に直結してあり、ナット部材をサーボモ
ータで回転しねじ軸を介して金型の開閉及び高推力の型
締めを行なう電動式型締め装置において、金型の開閉工
程は一方のサーボモータを正転駆動し、他方のサーボモ
ータを逆転駆動することにより倍速移動で行ない、型締
め直前には一方のサーボモータを停止して半速移動で低
推力の型閉じを行ない、型締め工程は双方のサーボモー
タを若干の速度差で同一方向に駆動することにより高推
力の型締めを行なうことを特徴とする射出成形機の電動
式型締め装置の駆動制御方法。 【３】固定側ダイプレート及び移動側ダイプレートの双
方にナット部材を回転のみ可能に設置し、これら双方の
ナット部材に共通にねじ込まれたねじ軸をタイバーとな
し、固定側ダイプレート及び移動側ダイプレートそれぞ
れのナット部材には個別に専用のサーボモータを回転動
力の伝達が可能に直結してあり、ナット部材をサーボモ
ータで回転しねじ軸を介して金型の開閉及び高推力の型
締めを行なう電動式型締め装置において、金型の開閉工
程は一方のサーボモータを正転駆動し、他方のサーボモ
ータを逆転駆動することにより倍速移動で行ない、型締
め直前に双方のサーボモータを若干の速度差で同一方向
に駆動することにより高推力の型締めを行なうことを特
徴とする射出成形機の電動式型締め装置の駆動制御方法
。[Scope of Claims] [1] A nut member is installed on a fixed platen or a die plate so that it can only rotate, and this nut member is rotated by an electric motor to open and close the mold via a screw shaft screwed into the nut member. In an electric mold clamping device that performs high-thrust mold clamping, nut members are installed on both the stationary die plate and the movable die plate so that they can only rotate, and a screw shaft is screwed into both nut members in common. A dedicated servo motor is directly connected to the tie bar and each nut member to enable the transmission of rotational power, and these two servo motors can be operated independently or jointly to open and close the mold or to generate high thrust. An electric mold clamping device for an injection molding machine that performs mold clamping. [2] Nut members are installed on both the fixed die plate and the moving die plate so that they can only rotate, and the threaded shafts commonly screwed into both nut members are used as tie bars, and the fixed die plate and the moving side A dedicated servo motor is directly connected to each nut member of the die plate to enable transmission of rotational power, and the nut member is rotated by the servo motor, opening and closing the mold and clamping the mold with high thrust through the screw shaft. In an electric mold clamping device, the mold opening/closing process is performed at double speed by driving one servo motor in the forward direction and driving the other servo motor in the reverse direction. Immediately before mold clamping, one servo motor is Injection molding that is characterized by stopping and moving at half speed to close the mold with low thrust, and in the mold clamping process, closing the mold with high thrust by driving both servo motors in the same direction with a slight speed difference. A method for controlling the drive of the electric mold clamping device of the machine. [3] Nut members are installed on both the stationary die plate and the movable die plate so that they can only rotate, and the threaded shaft commonly screwed into both nut members is used as a tie bar, and the fixed die plate and the movable side A dedicated servo motor is directly connected to each nut member of the die plate to enable transmission of rotational power, and the nut member is rotated by the servo motor, opening and closing the mold and clamping the mold with high thrust through the screw shaft. In an electric mold clamping device, the mold opening/closing process is performed at double speed by driving one servo motor in the forward direction and driving the other servo motor in the reverse direction. 1. A drive control method for an electric mold clamping device for an injection molding machine, which performs high-thrust mold clamping by driving in the same direction with a speed difference of .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14454588A JPH0651333B2 (en) | 1988-06-10 | 1988-06-10 | Electric mold clamping device of injection molding machine and drive control method thereof |
| DE8989120297T DE68901332D1 (en) | 1988-06-10 | 1989-11-02 | MASK PART. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14454588A JPH0651333B2 (en) | 1988-06-10 | 1988-06-10 | Electric mold clamping device of injection molding machine and drive control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01314128A true JPH01314128A (en) | 1989-12-19 |
| JPH0651333B2 JPH0651333B2 (en) | 1994-07-06 |
Family
ID=15364788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14454588A Expired - Fee Related JPH0651333B2 (en) | 1988-06-10 | 1988-06-10 | Electric mold clamping device of injection molding machine and drive control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0651333B2 (en) |
| DE (1) | DE68901332D1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0220309A (en) * | 1988-07-08 | 1990-01-23 | Fanuc Ltd | Mold clamping device |
| JPH0679732A (en) * | 1992-08-31 | 1994-03-22 | Nissei Plastics Ind Co | Motor-driven die clamping device of molding machine |
| US6179607B1 (en) | 1988-07-08 | 2001-01-30 | Fanuc Ltd | Two-platen mold-clamping apparatus |
| JP2002225100A (en) * | 2001-01-29 | 2002-08-14 | Mitsubishi Heavy Ind Ltd | Electromotive toggle mold clamping device and electromotive half nut on-off device |
| AT413089B (en) * | 2002-03-20 | 2005-11-15 | Engel Austria Gmbh | injection molder |
| JP2007098799A (en) * | 2005-10-05 | 2007-04-19 | Ube Machinery Corporation Ltd | Die closing device |
| JP2008105391A (en) * | 2006-09-29 | 2008-05-08 | Toyoda Gosei Co Ltd | Mold clamping mechanism and injection molding machine |
| CN102145379A (en) * | 2010-02-10 | 2011-08-10 | 罗兰门第公司 | Mote molding machine |
-
1988
- 1988-06-10 JP JP14454588A patent/JPH0651333B2/en not_active Expired - Fee Related
-
1989
- 1989-11-02 DE DE8989120297T patent/DE68901332D1/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0220309A (en) * | 1988-07-08 | 1990-01-23 | Fanuc Ltd | Mold clamping device |
| EP0381770A1 (en) * | 1988-07-08 | 1990-08-16 | Fanuc Ltd. | Two-platen type mold clamper |
| US6179607B1 (en) | 1988-07-08 | 2001-01-30 | Fanuc Ltd | Two-platen mold-clamping apparatus |
| JPH0679732A (en) * | 1992-08-31 | 1994-03-22 | Nissei Plastics Ind Co | Motor-driven die clamping device of molding machine |
| JP2002225100A (en) * | 2001-01-29 | 2002-08-14 | Mitsubishi Heavy Ind Ltd | Electromotive toggle mold clamping device and electromotive half nut on-off device |
| AT413089B (en) * | 2002-03-20 | 2005-11-15 | Engel Austria Gmbh | injection molder |
| US6986657B2 (en) | 2002-03-20 | 2006-01-17 | Engel Austria Gmbh | Injection molding apparatus |
| JP2007098799A (en) * | 2005-10-05 | 2007-04-19 | Ube Machinery Corporation Ltd | Die closing device |
| JP2008105391A (en) * | 2006-09-29 | 2008-05-08 | Toyoda Gosei Co Ltd | Mold clamping mechanism and injection molding machine |
| CN102145379A (en) * | 2010-02-10 | 2011-08-10 | 罗兰门第公司 | Mote molding machine |
| US20110195143A1 (en) * | 2010-02-10 | 2011-08-11 | Loramendi, S.Coop | Mote molding machine |
| US8956148B2 (en) * | 2010-02-10 | 2015-02-17 | Loramendi, S. Coop | Mote molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE68901332D1 (en) | 1992-05-27 |
| JPH0651333B2 (en) | 1994-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |