JP6183708B2 - Clamping device - Google Patents

Description

  The present invention relates to a mold clamping device for a die casting machine or an injection molding machine. More specifically, the present invention relates to a mold clamping device in which a movable platen is driven by a servo motor.

  A plurality of molds that can be divided are brought into close contact (clamping) with a clamping force applied, and then molten metal or molten metal is melted by an injection device in a closed space (mold cavity) formed in the mold. Die-casting machines and injection molding machines are known in which resin is injected to produce a cast product or resin molded product having a closed space shape. These die casting machines and injection molding machines are composed of an injection device and a mold clamping device. The mold clamping device brings a plurality of molds into close contact with each other with a clamping force applied (mold clamping), and separates the plurality of molds in order to take out a cast or molded product in a closed space (mold Device).

  The basic mold clamping device is fixed to the base, the fixed plate to which the fixed die is attached, the movable plate to which the movable die is attached and arranged to move forward and backward with respect to the fixed plate, and through the movable plate. Then, a plurality of tie bars, one end of which is fixed to the fixed platen, and a mold clamping force that causes the movable platen to move forward and backward with respect to the fixed platen and that the fixed die and the movable die are brought into close contact with each other with the clamping force applied. And a device.

  There are two main types of mold clamping force generators. Although the moving stroke is long, it does not require a large driving force, and the movable plate moves back and forth with respect to the fixed platen. On the other hand, although the moving stroke is short, the clamping force to the moving plate requires a large driving force. Due to the difference from the applying operation, as in Patent Document 1, a drive source for each operation is provided independently, a relatively long movement stroke can be secured, and a large driving force can be obtained by bringing the lockup state. As described in Patent Document 2, a toggle link mechanism that can generate, impart, and maintain a large clamping force with respect to the driving force of the driving source is employed, and each operation is performed by one driving source. It is a form.

  Furthermore, in recent years, like the clamping force generators of Patent Document 1 and Patent Document 2, a servo motor has been adopted as a driving source for operation that does not require a large driving force, and it has been electrified together with the ball screw mechanism. The planned mold clamping device is introduced. Among them, in particular, in the form of Patent Document 2 adopting the above-described toggle link mechanism, both the forward / backward movement operation of the movable platen and the clamping force applying operation can be motorized. It is the mainstream of electric mold clamping devices that are advantageous to the environment and controllability.

JP 2008-307739 A JP 2006-051754 A

  Specifically, the configuration in which the rotation of the servo motor is converted into a linear motion by the ball screw mechanism of such a motorized mold clamping device is, as in Patent Document 1 and Patent Document 2, a moving object side (movable platen, Alternatively, a servo motor with a ball screw nut of a ball screw mechanism fixed to a toggle link mechanism crosshead arranged on the movable platen side and a ball screw shaft that is screwed into the ball screw nut supported rotatably. In general, the ball screw nut that is screwed onto the ball screw shaft and the moving object to which the ball screw nut is fixed are advanced and retracted by rotating the ball screw nut.

  The ball screw shaft is supported so as to be able to rotate only, and does not move in the longitudinal direction (mold opening / closing direction) of the mold clamping device. The ball screw shaft has a configuration in which a pulley, a gear, or the like is fixed to the end of the ball screw shaft and is connected to a pulley, a gear, or the like of a servo motor shaft via a belt, a chain, or the like, and a coupling and a speed reducer at the shaft end. Is rotated by a configuration directly connected to the servo motor shaft via the shaft.

  In the above configuration, the rotation amount (rotation speed or rotation angle) of the ball screw shaft is detected as a pulse by an encoder attached directly or indirectly to the ball screw shaft, and the detected pulse (of the ball screw shaft) is detected. Rotation amount) and the lead of the ball screw shaft (the linear movement amount of the ball screw nut per one rotation of the ball screw shaft), the movement amount of the ball screw nut (advance / retreat operation amount) in the control means of the die casting machine or injection molding machine And the amount of movement of the moving object to which the ball screw nut is fixed is controlled. Conversely, in the same control means, the required amount of rotation of the ball screw shaft is obtained from the amount of movement of the movement target necessary for control, and the pulse corresponding to this required amount of rotation is converted into the amount of rotation of the servo motor. A converted pulse is obtained, and the servo motor is rotated in response to the converted pulse to control the movement amount of the movement target. In addition, it is possible to control the movement speed and movement acceleration of the moving object based on the change per unit time of the pulse (rotational angular velocity of the ball screw shaft and servo motor) and the change per unit time (rotational angular acceleration). It is. In this way, the motorized mold clamping device can control the position, movement speed, and movement acceleration of the movable platen (movable mold) with higher accuracy than the hydraulic mold clamping device.

  On the other hand, there are cases where the movable platen has to be moved to a predetermined position visually and manually with the mold opened. For example, at the time of positioning an insert part in a mold in insert molding of an injection molding machine. Insert molding means holding the insert parts carried from outside the mold clamping device on the mold cavity surface of the mold in the mold open state, then injecting the molten resin by injecting the mold (injecting) ) To produce a resin molded product in which the insert part and the resin are integrally molded.

  The insert part is inserted into the mold cavity by an insert device disposed on the side or above the mold clamping device of the injection molding machine. If this insert device is a device that uses a multi-axis industrial robot, etc., that has high positioning accuracy and repeatability of the insert parts, it can be used in the normal mold opening position without moving the movable mold for positioning. For each of the various molds (movable molds) to be attached, the insert position may be set on the insert device side.

  However, when the insert device is composed of a relatively simple mechanism that combines the linear motion and rotational motion of the actuator, the insert position on the insert device side for each of the various molds to be mounted in the normal mold opening position. It is difficult to set the positioning. Therefore, in such a case, on the mold clamping device side of the injection molding machine, the movable plate to which the movable mold is attached is moved in accordance with the position of the insert part gripped by the insert device, and the mold for insert molding is moved. It is common to set the opening position.

  As described above, when the movable board is moved to a predetermined position by visual observation and manual operation, it is also possible to move the movable board by inputting the movement amount from the interface of the operation panel. However, since it is difficult to accurately grasp the amount of movement of the movable board, in practice, the push button (button) provided on the operation panel is operated to visually confirm the positional relationship between the insert part and the movable mold. The movable plate will be moved directly. In order to prevent erroneous operation for safety, the manual advancement / retraction operation of the movable panel is performed by pressing a mechanical push button with a finger instead of a display button on the touch panel of the operation panel. Furthermore, this push button is divided into two places and arranged on the operation panel, and is designed so that it must be operated with both hands.

  Therefore, while confirming the inside of the mold clamping device visually from the front of the operation panel and moving the movable panel to an appropriate position while pressing the push button with both hands, this work is very labor and time consuming. Because of the configuration of the push button in which the movable plate moves only while it is being pressed, it is difficult to operate a delicate amount of movement, and if the push button is operated incorrectly, the insert device is damaged by the movable plate. In addition, if the insert part is not properly positioned at the proper insert position, the insert part will not be properly held on the mold cavity surface, and the insert part will be misaligned or mixed into the unintended position in the molded product. There was a problem that occurred. Since such insert molding is also performed in casting by a die casting machine, there is a similar problem in a mold clamping device of the die casting machine.

  The present invention has been made in view of the above-described problems. Specifically, in a mold clamping device in which a movable plate is driven by a servo motor, a die that facilitates manual position adjustment of the movable plate. The object is to provide a fastening device.

The object of the present invention is to generate a pulse corresponding to the rotation angle of the rotary operation unit,
Control means for rotating the servo motor in response to the pulse;
A toggle link mechanism that is driven by the servo motor and moves the movable platen ,
In the control means, the movement of the movable platen driven by the servomotor is linked to the rotation operation of the rotation operation unit of the pulse generation unit irrespective of the position of the movable platen . While being corrected based on the characteristic curve ,
In the control means, this is achieved by a mold clamping device capable of arbitrarily changing the ratio of the movement amount of the movable platen that is linked to the rotation angle of the rotation operation of the rotation operation unit .

  In the mold clamping device according to the present invention, it is preferable that the movement amount of the movable platen is controlled so as to be interlocked with the rotation angle of the rotation operation of the rotation operation unit. More preferably, the moving speed of the movable platen is controlled so as to be linked to the rotational angular speed of the rotating operation of the rotating operation unit. The movement acceleration of the movement of the movable board may be controlled so as to be interlocked with the rotation angular acceleration of the rotation operation of the rotation operation unit.

The mold clamping device according to the present invention includes a pulse generating means for generating a pulse corresponding to the rotation angle of the rotation operation unit,
Control means for rotating the servo motor in response to the pulse;
A toggle link mechanism that is driven by the servo motor and moves the movable platen ,
In the control means, the movement of the movable platen driven by the servomotor is linked to the rotation operation of the rotation operation unit of the pulse generation unit irrespective of the position of the movable platen . Since the correction is made based on the characteristic curve, the ratio of the movement amount of the movable platen that is linked to the rotation angle of the rotation operation of the rotation operation unit can be arbitrarily changed in the control means. The position adjustment of the movable platen by manual operation can be facilitated.

1 is a schematic plan view of an injection molding machine having a mold clamping device according to Embodiment 1 of the present invention. It is a schematic side view of the injection molding machine which has a mold-clamping apparatus based on Example 1 of this invention. It is a schematic external view of the rotation operation part of the pulse generation means of the mold clamping device based on Example 1 of this invention. 6 is a characteristic curve showing the moving speed of the movable platen relative to the position of the movable platen when the crosshead is moved at a constant speed in a mold clamping device employing a toggle link mechanism.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  Embodiment 1 of the present invention will be described with reference to FIGS. First, a basic configuration of an injection molding machine having a mold clamping device according to Embodiment 1 of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the mold clamping device 10 according to the first embodiment of the present invention is fixed to a base 11, a fixed platen 12 to which a fixed die 12 a is attached, and a movable die 13 a are attached to the fixed platen 12. The movable platen 13 is disposed so as to be able to advance and retreat on the base 11, a plurality of tie bars (not shown) that pass through the movable platen 13 and one end of which is fixed to the fixed platen 12, The mold clamping force generating device 14 is configured to make the fixed mold 12a and the movable mold 13a come into close contact with each other in a state where the mold clamping force is applied by moving forward and backward. In the first embodiment, this mold clamping device is the mold clamping device of the injection molding machine 1, and the mold clamping force generating device 14 performs the advance / retreat operation of the movable plate relative to the fixed plate, similar to Patent Document 1. The servo motor and ball screw mechanism are used. An injection device 9 is disposed on the base 11 of the injection molding machine 1 on the side facing the fixed mold 12a of the fixed platen 12. The injection device 9 penetrates through the fixed platen 12, and its nozzle part can be contacted and separated from the fixed mold 12a. . In addition, about the structure which performs the mold clamping force provision operation | movement to a movable board, since it is not directly related to this invention, description is omitted.

  On the operation side of the injection molding machine 1, an operation panel 21 is arranged for the operator 30 to perform various operations. In addition, a movable safety door 22 is disposed on a mold dividing surface (parting line) between the fixed mold 12a and the movable mold 13a and a mold opening / closing stroke range of the movable plate 12 and the movable mold 12a in the mold opening / closing operation. Even when the safety door 22 is closed, the operator 30 can check the inside of the mold clamping device 10 from the window 22a.

  On the non-operation side of the injection molding machine 1, an insert device 15 for holding the insert part 16 on the mold cavity surface of the movable mold 13a is disposed. The insert device 15 includes a gripping portion 15a for gripping the insert component 16, a gripping portion 15a disposed at the distal end thereof, an extendable arm portion 15b, and a turning portion 15c for turning the arm portion 15b (up and down if necessary) It is the apparatus comprised from these. Similarly, the insert component supply device 17 is disposed on the non-operation side, and the insert component 16 is supplied to a fixed position of the insert component supply device 17 for each molding cycle. The insert device 15 holds the inserted insert component 16 in the mold open state by holding the inserted insert component 16 with the gripping portion 15a and then turning and extending (if necessary, raising and lowering) the arm. It is supplied to a predetermined position between the mold 12a and the movable mold 13a (except for the position in the mold opening / closing direction, adjusted to the insert position).

  As described above, since the insert device 15 is not a device using a multi-axis industrial robot or the like, the insert device 15 corresponds to each of various molds to be attached at a normal mold opening position. It is difficult to set the insert position on the side. Therefore, the position of the movable mold 13a (movable platen 13) is moved to the fixed mold 12a side so that the insert part 16 can be inserted at a predetermined position on the mold cavity surface of the movable mold 13a while being gripped by the grip portion 15a. In other words, it is necessary to set the mold opening position for insert molding of the attached movable mold 13a on the mold clamping device 10 side.

  Next, the position adjustment method of the movable platen using the pulse generating means 40 and the pulse generating means 40 of the mold clamping apparatus 10 according to the first embodiment of the present invention will be described with reference to FIGS. .

  FIG. 2 is a schematic side view of the injection molding machine 1 having the mold clamping device according to the first embodiment of the present invention. As shown in FIG. 2, the operation panel 21 has a pulse generating means 40 at a position where the operator 30 can operate from the window 22 a of the safety door 22 in a state where the inside of the mold clamping device 10 can be confirmed. A handle-like rotation operation unit 40a and a movement amount mode changeover switch 40b are arranged. The control means 40c of the pulse generating means 40 may be arranged in the operation panel separately from the control means of the injection molding machine 1 or in the control panel where the control means of the injection molding machine 1 is arranged. Then, it may be incorporated in the control means of the injection molding machine 1. In the first embodiment, it is assumed that it is arranged in the operation panel 21 separately from the control means of the injection molding machine 1.

  FIG. 3A shows the rotation operation unit 40a of the pulse generating means 40 and the movement amount mode changeover switch 40b. First, the approximate distance between the insert position of the insert part 16 and the insert part 16 gripped by the insert device on the mold cavity surface of the movable mold 13a is visually confirmed, and the movable mold 13a is surely smaller than that. The movement amount mode changeover switch 40b is operated so as to move the distance, and an appropriate movement amount mode is selected. The movement amount mode sets how much the movable platen 13 is moved by one rotation of the rotation operation unit 40a. In other words, the movement of the movable platen 13 linked to the rotation angle of the rotation operation of the rotation operation unit 40a. The ratio of the amount of movement is arbitrarily changed. For example, an appropriate option may be selected according to the mold opening / closing stroke of the mold clamping device 10 such as a mode in which the movement is made by 50 mm per rotation and a mode in which the movement is made by 10 mm per rotation. It is assumed that the movement distance measured is about 100 mm and the mode of moving 50 mm by one rotation is selected.

  Next, the rotation operation unit 40a is slowly rotated. From the amount by which a ball screw nut of a ball screw mechanism (not shown) of the mold clamping force generator 14 is moved according to the amount of rotation (rotation angle) of the rotation operation unit 40a, the required amount of rotation of the ball screw shaft is determined by the control means 40c. A pulse for rotating a servo motor (not shown) by the amount of rotation that satisfies the required amount of rotation is transmitted from the control means 40c to the servo motor via the control means of the injection molding machine 1 (not shown) and is movable. The board 13 moves. For example, in the selected movement amount mode, when the rotation operation unit 40a is rotated by ¼ rotation (90 °), the movable platen 13 is moved by 50 mm × 1/4 = 12.5 mm according to the rotation operation.

  Next, after moving the movable mold 13a (movable platen 13), the distance from the insert part 16 is visually confirmed. If necessary, the moving amount mode is switched to a smaller mode, and the insert molding of the movable platen 13 is performed. Position the mold opening position. For example, when the movement amount mode for moving 10 mm per rotation is selected, the movable platen 13 can be moved 10 mm × 1/4 = 2.5 mm by 1/4 rotation (90 °) of the rotation operation unit 40a.

  In such movement amount control of the movable platen 13 by the rotation operation of the rotation operation unit 40a, as described above, the rotation angular velocity and the rotation angle acceleration in the rotation operation of the rotation operation unit 40a are also the movement velocity of the movable platen 13. Needless to say, it is faithfully reflected in the movement acceleration. Therefore, by rotating the rotation operation unit 40a carefully and slowly, the movable platen 13 is also moved slowly according to the rotation, or the rotation speed is reduced at the end of the rotation operation, and the movable platen 13 is also moved last. Can be slowed down.

  As described above, the mold clamping device 10 according to the present invention is controlled so that the movement of the movable platen 13 is interlocked with the rotation operation of the rotation operation unit 40a of the pulse generating means 40 in a state where the optimum movement amount mode is appropriately selected. Thus, the position adjustment of the movable plate is very easy with respect to the positioning performed by operating the push button, and the position of the movable plate can be adjusted efficiently.

  On the other hand, when the ratio of the movement amount of the movable platen 13 that is linked to the rotation angle of the rotation operation of the rotation operation unit 40a is fixed 1: 1, if the movement amount is fixed with a very small movement amount with respect to a certain rotation angle, it is movable. When it is desired to move the board 13 for a long distance, it is necessary to rotate the rotation operation section many times, and the position adjustment efficiency of the movable board 13 is deteriorated. On the other hand, if the movable plate is fixed with a very long movement amount with respect to the same rotation angle, the rotation operation unit 40a needs to be rotated by a minute angle when the movable plate is to be moved by a small distance, and the position adjustment efficiency of the movable plate 13 is deteriorated. In addition, the movable platen 13 may be moved too much to damage other devices such as the insert device. As described above, the ratio of the movement amount of the movable platen 13 that is linked to the rotation angle of the rotation operation of the rotation operation unit 40a can be arbitrarily changed according to the distance that the movable platen 13 is to be moved. The position of the movable platen can be adjusted more efficiently by adjusting the position of the movable platen 13 while appropriately selecting the optimum movement amount mode with the configuration such as the movement amount mode changeover switch 40b.

  Whether or not the movement amount mode changeover switch 40b is employed as described above, in order to prevent malfunction of the movable platen 13, a restriction such as an upper limit is set on the rotational angular velocity during the operation of the rotary operation unit 40a. If the rotary operation unit 40a is unintentionally touched to rotate the same operation unit, or if the same operation unit is rotated faster than necessary, control to prevent the movable platen 13 from moving or fixing Monitor the mold opening distance between the mold 12a and the movable mold 13a, and when the movement amount mode that seems to be excessive with respect to the same distance is selected, an alarm is issued and it is used in conjunction with the control to prevent it from operating. It is preferable for safety. Further, the present invention can be carried out only in the position adjustment operation mode of the movable platen 13 by manual operation. The present invention is not limited to the manual operation mode other than that of the die casting machine or the injection molding machine or the automatic operation mode. It goes without saying that it should not be affected.

  In the first embodiment, the rotation operation unit 40a and the movement amount mode changeover switch 40b are arranged on the operation panel 21. However, as shown in FIG. 3B, the rotation operation unit 40a and the movement amount mode changeover switch 40b are arranged. 40b may be arranged in another unit 41 that is electrically connected to the operation panel 21 and the like, and the position of the movable panel 13 may be adjusted in a state of being separated from the operation panel 21.

  In this case, after taking safety measures such as a safety plug as in robot teaching (teaching) when a multi-axis industrial robot is used for the product take-out device and release agent application device (spray device), By setting a position adjustment mode in which the position of the movable platen 13 can be adjusted while the safety door 22 is opened, the position adjustment of the movable platen 13 is further facilitated. The separate unit 41 is provided with functional parts that are considered necessary when adjusting the position of the movable platen 13 during insert molding, such as a liquid crystal unit 41a for displaying the moving amount of the movable platen 13 and an emergency stop button. May be.

  Next, a second embodiment of the present invention will be described. In the second embodiment, the mold clamping force generation device 14 of the mold clamping device 10 toggles the movement of the movable plate relative to the fixed platen and the operation of applying the mold clamping force to the movable platen as in Patent Document 2. A link mechanism is adopted, and one servo motor and a ball screw mechanism are used. Since the rest of the configuration is basically the same as that of the mold clamping device 10 of the first embodiment, only differences from the first embodiment will be described.

  In the mold clamping force generator 14 that employs a toggle link mechanism, the movable plate 13 moves in terms of the movement speed of a cross head (not shown) that moves forward and backward by a ball screw nut of a ball screw mechanism (not shown). The moving speed of the movable platen 13 moved through the toggle link structure is not proportional due to the forward / backward movement of the crosshead, and the moving speed of the movable platen 13 depends on the characteristic curve of each toggle link mechanism called a toggle curve. It is a changing point.

  Specifically, when the toggle link mechanism moves (advances) the crosshead at a constant speed in the mold closing direction from the state where the link structure is most folded in the mold open state, immediately after the start of the movement of the crosshead, The moving speed of the movable platen 13 gradually increases and reaches the highest speed near the middle of the mold opening / closing stroke. Thereafter, the moving speed of the movable platen 13 gradually decreases until immediately before the mold clamping state where the link structure is gradually extended and finally the link mechanism is locked up. Thus, the toggle link mechanism has a characteristic that the moving speed of the movable platen 13 is the fastest in the middle of the mold opening / closing stroke and relatively slow before and after the movement of the crosshead at a constant speed. . This is shown in FIG. FIG. 4 is a characteristic curve showing the moving speed of the movable platen relative to the movable platen position when the crosshead is moved at a constant speed in the mold clamping device employing the toggle link mechanism.

  If this characteristic is replaced by the relationship between the amount of movement of the crosshead and the amount of movement of the movable platen 13, when the crosshead is moved by a certain amount, the corresponding amount of movement of the movable platen 13 is the mold opening position of the movable platen 13. Depending on the movement speed, it is the largest near the middle of the mold opening / closing stroke, and relatively small before and after that. Although depending on the specifications of the toggle link mechanism, it is said that the moving amount of the movable platen 13 is about 1/10 of the moving amount of the cross head immediately before the mold clamping state. In a mold clamping device that employs a toggle link mechanism as a mold clamping force generator, it is possible to control the mold clamping force and the position of the movable plate with high accuracy by using the characteristic curve immediately before the mold clamping state. It is a feature.

  In such a mold clamping device that employs the toggle link mechanism as a mold clamping force generator, unlike the first embodiment, the movement amount of the ball screw nut and the movement amount of the movable platen of the ball screw mechanism are adopted. What is necessary is just to correct | amend according to the characteristic curve of a toggle link mechanism. Specifically, the characteristics of the toggle link mechanism so that the rotation amount angle of the rotation operation of the rotation operation unit 40a and the movement amount of the movable platen 13 are proportional to each other according to the selected movement amount mode. A pulse corrected according to the curve may be transmitted to the servo motor. In short, the pulse to the servo motor when the mold is closed from the mold open state is decreased near the middle of the mold opening / closing stroke based on the characteristic curve, and increased near the mold opening limit position and immediately before the mold clamping state. Just do it.

  By performing such correction, the same effects as in the first embodiment can be obtained. That is, even the toggle link type mold clamping device in which the number of movements of the movable plate 13 changes based on the characteristic curve of the toggle link mechanism is not proportional to the number of rotations of the servo motor and the amount of movement of the movable platen. The board position can be adjusted efficiently. In such a mold clamping device that employs the toggle link mechanism as a mold clamping force generation device, also in the movement amount control of the movable platen 13 by the rotation operation of the rotation operation unit 40a, only the rotation angle in the rotation operation of the rotation operation unit 40a. Needless to say, the rotational angular velocity and the rotational angular acceleration are also corrected according to the characteristic curve of the toggle link mechanism, and are faithfully reflected in the moving speed and the moving acceleration of the movable platen 13.

  The mold clamping device according to the present invention is configured to cause the movable plate to move back and forth with respect to the fixed platen as long as the movable platen is driven by a servomotor in either a die casting machine or an injection molding machine. It can be easily implemented using a screw mechanism. A further advantage of the present invention is that the pulse generating means of the present invention is commercially available for precise positioning of a work target fixed plate (XY table) of an NC machine tool (numerical control machine tool) such as an NC lathe. The manual pulse generator can be used as it is as a configuration. As for the manual pulse generator, as shown in FIG. 3 (a), the panel mounting type assuming direct mounting to the operation panel of another device is also a handy type assuming hand operation as shown in FIG. 3 (b). Are also commercially available. The manual pulse generator is almost equipped with the pulse generation function according to the rotation angle and rotation angular velocity of the rotary operation unit as described above, the function corresponding to the movement amount mode switch, etc. If the mold clamping device is driven by a movable platen, a commercially available manual pulse generator is used to mechanically install and electrically connect the manual pulse generator to the operation panel, as well as for die casting machines and injection molding machines. If the control means performs the pulse capturing into the control program, the present invention can be implemented in the existing die casting machine or the mold clamping device of the injection molding machine without a large mechanical modification.

  Further, correction according to the characteristic curve of the toggle link mechanism as described in the second embodiment is also easy. That is, in a mold clamping device that employs a toggle link mechanism as a mold clamping force generator, each toggle link mechanism is provided in the control means of a die casting machine or injection molding machine for mold opening / closing speed and positioning control of the movable platen. Therefore, the present invention can be easily implemented by changing the control program so that the pulse of the manual pulse generator is corrected on the control means side of the die casting machine or injection molding machine.

DESCRIPTION OF SYMBOLS 10 Mold clamping device 13 Movable board 14 Mold clamping force generator 21 Operation panel 30 Operator 40 Pulse generation means 40a Rotation operation part 40b Movement amount mode switch 40c

Claims (4)

Pulse generating means for generating a pulse corresponding to the rotation angle of the rotation operation unit;
Control means for rotating the servo motor in response to the pulse;
A toggle link mechanism that is driven by the servo motor and moves the movable platen ,
In the control means, the movement of the movable platen driven by the servomotor is linked to the rotation operation of the rotation operation unit of the pulse generation unit irrespective of the position of the movable platen . While being corrected based on the characteristic curve ,
A mold clamping device capable of arbitrarily changing a ratio of the amount of movement of the movable platen linked to the rotation angle of the rotation operation of the rotation operation unit in the control means .   The mold clamping apparatus according to claim 1, wherein a movement amount of the movable plate is controlled so as to be interlocked with a rotation angle of a rotation operation of the rotation operation unit.   The mold clamping apparatus according to any one of claims 1 and 2, wherein a moving speed of movement of the movable platen is controlled so as to be interlocked with a rotation angular speed of a rotation operation of the rotation operation unit.   The mold clamping apparatus according to any one of claims 1 to 3, wherein a movement acceleration of the movement of the movable platen is controlled so as to be interlocked with a rotation angular acceleration of a rotation operation of the rotation operation unit.

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