JP2003181894A - Mold clamping device and joining position adjusting method therfor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold clamping device capable of easily adjusting and moving a stay corresponding to a change in the thickness of a mold to be held so as to obtain positional relation capable of mutually engaging the half nut of a joining means and a predetermined position of the engaging part of the stay. <P>SOLUTION: The mold clamping device is equipped with the joining means 7 for joining the half nut 27 provided to a movable platen 2 to the engaging part 25 of the stay 6 at the predetermined position of the locking part in a releasable manner, a mold opening and closing means 8 for relatively rapidly moving the movable platen 2 to a fixed platen 1 in such a state that the joining means 7 does not join the movable platen 2 to the stay 6, a mold clamping means 9 for axially pressing the stay 6 so as to clamp molds 3 and 4 in such a state that the joining means 7 joins the movable platen 2 to the stay 6 and a joining position adjusting means 10 for adjusting and moving the stay 6 in the axial direction thereof so as to make the engaging part 25 of the stay 6 engage with the half nut 27. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device used in a molding machine for injection molding or die casting, and a method for adjusting the connecting position of the mold clamping device. TECHNICAL FIELD The present invention relates to a mold clamping device provided with a mold opening / closing means for opening and closing a mold, and a mold clamping means for clamping a mold with a relatively strong force, and a method for adjusting a coupling position when adjusting the mold thickness of such a mold clamping device or during molding. It is a thing.

As a conventional technique of the mold clamping device, for example,
As disclosed in Japanese Patent Publication No. 2-9924, a fixed die plate (fixed plate) for holding a fixed die, a movable die plate (movable plate) for holding a movable die, and the movable die plate are provided. A means for moving the movable die plate forward and backward relative to the fixed die plate, and the movable die plate approaches the fixed die plate and is fixedly coupled to the movable die plate immediately before the fixed die and the movable die are closed, and the die is clamped after the die is closed. In the mold clamping device including a tie bar for performing the above, locking means for locking the tie bar (stay) inserted in the tie bar insertion hole provided in the moving die plate to the moving die plate, and the locking means The moving die plate and the fixed die plate are clamped (molded) via a locked tie bar, and a mold clamping means is provided, and the locking means is a mold mounting of the movable die plate. A stop ring that is adjustable in position on the tie bar so that it locks with the side, and a half nut that is movable on the opposite side of the die mounting surface of the moving die plate so that it can move substantially at right angles to the axis of the tie bar insertion hole. The tie bar is provided with a screw part that meshes with the half nut, and the tie bar is locked and positioned on the die mounting surface side of the moving die plate, and then the tie bar and the moving die are meshed with the half nut. There is known a mold clamping device which is configured to be fixedly coupled to a plate.

That is, in the mold clamping device disclosed in Japanese Patent Publication No. 2-9924, a stop ring is provided in order to allow a half nut to be meshed with a screw portion provided on a part of a tie bar. It is provided on the tie bar so that its position can be adjusted freely, and is configured to lock the die mounting surface side of the moving die plate. In the drawings of the publication, the axial length of the thread portion of the tie bar is described to be substantially the same as the width of the half nut. Further, in the mold clamping device disclosed in the rear, the moving die plate is moved by means for moving the moving die plate forward and backward with respect to the fixed die plate (boost cylinder) and locked by the stop ring to position the half nut. It is described that the mold is clamped by meshing with the threaded portion of the tie bar to fix the tie bar and moving the tie bar to the fixed die plate side. Further, in the mold clamping device disclosed in this publication, one end of the tie bar extends from a hydraulic cylinder as a means for moving the movable die plate forward and backward with respect to the fixed die plate, and a screw portion is provided to insert the movable die plate. The other end inserted into the hole is a free end.

As another conventional technique, Japanese Patent Laid-Open No. 6-
As disclosed in Japanese Patent No. 238732, both ends of a connecting plate and a fixed plate, which are spaced apart from each other, are fixed to the connecting plate and the fixed plate, respectively. Or guided by a tie bar with a groove,
After supporting the movable mold by the mold opening / closing cylinder attached to the fixed plate supporting the fixed mold and moving the movable plate with the mold clamping cylinder back and forth with respect to the fixed mold, and closing both molds, the mold clamping In a mold thickness adjusting device for a mold clamping device that applies a mold clamping force by a cylinder, a guide bar having a screw or groove on an outer periphery parallel to the tie bar on a base on which the mold clamping device is placed, and the mold clamping cylinder. A bracket which is fixed and has a through hole that slidably fits in the guide bar, and is screwed or fitted in a screw or groove of the guide bar so that the position in the axial direction can be adjusted, and the bracket in the mold closing position. There is known a mold thickness adjusting device for a mold clamping device, characterized in that it comprises a stopper which hits against and a detecting means which is provided on the half nut and detects a tie bar screw or a groove position.

That is, in the mold thickness adjusting device of the mold clamping device disclosed in Japanese Patent Laid-Open No. 6-238732, the movable platen is moved close to the fixed platen together with the mold clamping cylinder by the mold opening / closing cylinder, and the bracket of the mold clamping cylinder is moved. Is brought into contact with the stopper to position the movable plate at the forward limit position, and the mold is closed. Then, the mold clamping cylinder is extended to drive it backward, and the screw thread of the tie bar is detected by the detecting means to engage the half nut with the screw thread, and then the mold clamping cylinder is further extended to drive the mold clamping cylinder. Give power.

As another conventional technique, Japanese Patent Publication No.
As disclosed in JP-A-59369, a fixed plate for holding a fixed mold having a plurality of mold clamping cylinders is fixed on one end of a machine base, and a movable plate for holding a movable mold is attached to the machine base. It is placed on the other end side of the so that it can move forward and backward while facing the fixed plate, and one end of the tie bar that penetrates the movable plate is provided slidably in each mold clamping cylinder on the piston part.
Also, the other end is fixed to the connecting plate, a screw part or groove is provided in the axial center of the tie bar, and a half nut that can be meshed with the screw part or groove on the tie bar is attached to the movable plate. In a mold clamping device of a molding machine, a moving cylinder for moving a movable platen forward and backward toward a fixed plate is arranged so as to be meshed with a connecting plate, and the movable cylinder is meshed with the movable cylinder fore and aft to move the nut in half. There is known a mold clamping device of a molding machine in which a screw engagement adjusting device capable of engaging a screw part or a groove part on a tie bar is provided on the side opposite to the movable plate of the connecting plate.

That is, in the mold clamping device for a molding machine disclosed in Japanese Patent Publication No. 7-59369, a half plate nut of a connecting plate meshed with a moving cylinder is locked so that the half nut can be locked in a screw part or a groove part of a tie bar. By rotating the sprocket of the screw mesh adjusting device, the movable plate having the half nuts attached is moved via the moving cylinder.

[0008]

However, among the above-mentioned conventional techniques, in the mold clamping device disclosed in Japanese Patent Publication No. 2-9924, the axial length of the screw portion of the tie bar is a half nut. The width of the half nut is almost the same as that of the half nut, and the half nut is not positionally adjusted to be meshed with a predetermined position of the thread portion of the tie bar having an axial length longer than the width of the half nut. And the thing of the said gazette is
Since the moving die plate is brought into contact with the stop ring provided on the tie bar, an impact occurs when the moving die plate comes into contact with the stop ring on the stop ring, and it is movable to reduce the impact. There is a problem that the moving speed of the die plate closer to the fixed plate cannot be improved. Further, the method disclosed in the publication has a problem that the position where the stop ring is provided with respect to the tie bar must be changed depending on the thickness of the holding die (die thickness). Further, in the mold clamping device disclosed in the publication, when the mold is replaced, the relatively heavy moving die plate is moved by the boost cylinder to cope with the change in the mold thickness. In addition to being unable to miniaturize, there was a problem that it could not perform accurate and fine movement control of the moving die plate, and it took time to move the moving die plate by the boost cylinder. . Further, in the mold clamping device disclosed in the publication, since the other end of the tie bar on which the threaded portion is provided is a free end, the tie bar is deformed by its own weight to be lowered into the insertion hole of the movable die plate. It could be difficult to insert.

Among the conventional techniques, Japanese Patent Laid-Open No. 6-23
In the mold thickness adjusting device of the mold clamping device disclosed in Japanese Patent No. 8732, in order to position the movable platen at the forward limit position when adjusting the mold thickness, a relatively heavy movable platen is clamped by a mold opening / closing cylinder. In addition, the mold opening / closing cylinder cannot be downsized because it is moved closer to the fixed plate, and the ram of the mold clamping cylinder is driven to determine the meshing position of the half nut with respect to the screw thread. However, there are problems that the movable platen cannot be accurately and finely controlled, and that it takes time to move the half nut to the meshing position with respect to the thread. Further, in the one disclosed in the publication, since the bracket of the mold clamping cylinder is brought into contact with the stopper, it is necessary to adjust the position of the stopper according to the change in the mold thickness of the held mold. There is a problem that a shock is generated when the bracket of the mold clamping cylinder is brought into contact with the stopper, and in order to reduce the shock, the moving speed of the movable die plate to the fixed platen cannot be improved. There is. And, in the one disclosed in the publication, a mold clamping cylinder for applying a mold clamping force is used to try to engage a half nut with a thread of a tie bar. There is a problem that it is difficult to move the nut to a position where it can be engaged with the thread.

Further, among the conventional techniques, Japanese Patent Publication No. 7-5
In the mold clamping device of a molding machine disclosed in Japanese Patent No. 9369, when a mold is replaced, a half nut is moved so that it can be locked in a screw part or a groove part of a tie bar, In order to respond to the change in thickness, a relatively heavy movable plate to which the half nut is attached is moved, and it is for rotating the sprocket of the screw mesh adjusting device of the connecting plate meshed with the moving cylinder. There is a problem that the drive source cannot be downsized.

The present invention has been made in order to solve the above-mentioned problems and has a simple structure and easily responds to changes in the die thickness of a die to be held, and at the time of molding, a half nut of a connecting means. Provided is a mold clamping device which can be easily adjusted and moved by a relatively small driving source so that the predetermined position of the engaging portion of the stay and the predetermined position of the stay can be engaged with each other and the positioning can be accurately performed. The purpose is to do. Further, the present invention has been made to solve the above problems, with a simple configuration, easily respond to changes in the mold thickness of the holding mold, and at the time of molding, with a half nut of the coupling means. An object of the present invention is to provide a connecting position adjusting method for a mold clamping device that can accurately position a stay so that it can be engaged with a predetermined position of an engaging portion of the stay.

[0012]

In order to solve the above-mentioned problems, the invention relating to the mold clamping device according to claim 1 is to provide a fixed plate to which one mold is attached, and a stay holder arranged to face the fixed plate. A stay whose ends are respectively supported by a fixed platen and a stay holder, a movable platen into which the stay is inserted so that it can move toward and away from the fixed platen, and the other mold is attached, and a movable platen. Is releasably coupled to the stay at a predetermined position, mold opening / closing means for relatively quickly and controllably moving the movable platen relative to the fixed platen by driving the servomotor, and the coupling device is connected to the stay. In the state where the movable platen is connected, the mold clamping means for axially pressing the stay to which the movable platen is connected with a relatively large force, and the stay for both the mold opening side and the mold closing side by the pressing of the mold clamping means. The station that can be moved Of so as to couple the predetermined position and the movable platen, and is characterized in that it comprises a coupling position adjusting means for adjusting moves the relative position of the movable platen and the stay, the.

In order to solve the above-mentioned problems, the invention relating to the mold clamping device according to claim 2 is the invention according to claim 1, in which the mold clamping means is provided on the fixed platen, and one end of the stay is mold clamped. The stay is fixed to the stay holder at the other end thereof, and the connecting position adjusting means is configured to adjust the position of the stay relative to the movable plate in the axial direction by moving the stay holder. It is characterized by that.

In order to solve the above-mentioned problems, the invention relating to the mold clamping device according to claim 3 is the invention according to claim 1 or 2, wherein the mold opening / closing means is arranged parallel to the stay, and the shaft is driven by a servomotor. The present invention is characterized by comprising a ball screw shaft that is rotationally driven around and a ball screw nut that is provided on a movable plate and that is screwed into the ball screw shaft.

In order to solve the above-mentioned problems, an invention according to a mold clamping device of a fourth aspect is the invention according to the first aspect, in which the mold clamping means is provided on the stationary platen and one end of the stay is clamped. The stay is fixed to the stay holder at the other end of the stay, and the mold opening and closing means is arranged in parallel with the stay and is mounted on the movable platen with a ball screw shaft that is driven to rotate about its axis by the drive of a servomotor. A ball screw nut that is provided and screwed to the ball screw shaft is provided, and the connecting position adjusting means detects the relative position of the movable plate and the stay, and the stay based on the detection of the detecting means. Control means for controlling the drive of the servo motor of the mold opening / closing means so that the movable plate can be coupled to a predetermined position where the mold can be moved to both the mold opening side and the mold closing side. Characterized by Is.

In order to solve the above problems, the invention according to claim 5 relates to the mold clamping device according to claim 3 or 4, wherein the ball screw shaft supporting means for supporting the end portion of the ball screw shaft is a stay holder. It is characterized by being provided.

In order to solve the above-mentioned problems, the invention relating to a mold clamping device according to claim 6 is the invention according to any one of claims 1 to 5, wherein the coupling position adjusting means is attached to the fixed plate and the movable plate. It is characterized in that the relative position of the movable plate and the stay is adjusted and moved so that the movable plate can be connected to a predetermined position of the stay by the connecting means according to the die thickness of the mold. .

In order to solve the above-mentioned problems, the invention relating to a mold clamping device according to a seventh aspect is the invention according to any one of the first to third aspects, in which the connecting position adjusting means is movable at a mold closing position during molding. It is characterized in that the position of the stay in the axial direction is adjusted and moved so that a predetermined position of the stay can be coupled to the board.

In order to solve the above-mentioned problems, the invention relating to the mold clamping device according to claim 8 is the invention according to claim 1 or 4, wherein the connecting position adjusting means is a strong mold separated from the mold closing position at the time of molding. In order to connect the movable platen to a predetermined position of the stay in the opened state, the position of the movable platen is adjusted and moved by driving the servo motor of the mold opening / closing means. is there.

In order to solve the above-mentioned problems, a ninth aspect of the present invention is provided.
The invention relating to the method for adjusting the coupling position of the mold clamping device, is such that a fixed plate to which one mold is attached, a stay is inserted so as to be movable toward and away from the fixed plate, and the other mold is attached. Movable plate, a connecting means for releasably connecting the movable plate to a predetermined position with respect to the stay, and a mold opening / closing means for relatively quickly and controllably moving the movable plate relative to the fixed plate by driving a servomotor. And a mold clamping means for axially pressing the stay to which the movable plate is coupled with a relatively large force, and a predetermined position of the stay movable to both the mold opening side and the mold closing side by the pressing of the mold clamping means. And a movable platen so that the movable platen and the movable platen can be combined with each other, the mold clamping device is provided with a coupling position adjusting means for adjusting and moving the relative position between the movable platen and the stay. Mold opening side and mold closing side by pressing the clamping means A method of adjusting the connecting position between the movable platen and the stay by the connecting means so that the movable platen and the predetermined position of the movable stay can be connected to each other. Between the fixed platen and the movable platen by moving the movable platen close to the fixed platen by the mold opening and closing means, and based on the drive amount of the servo motor of the mold opening and closing means. The mold thickness of the mold is measured, and according to the measured mold thickness, the stay can be moved to both the mold opening side and the mold closing side by pressing the mold clamping means, and the stay is connected to the movable platen. The movable platen and the stay are moved relative to each other by driving the servo motor of the coupling position adjusting means so that the movable platen and the stay can be coupled to each other at predetermined positions according to the computation. It is possible to connect the stay and the movable plate by connecting means. The one in which the features.

In order to solve the above-mentioned problems, the invention relating to the connecting position adjusting method of the mold clamping device according to claim 10 is such that a fixed plate to which one mold is attached and a movable close / retractable movement with respect to the fixed plate. The movable plate to which the stay is inserted and the other mold is attached, the connecting means for releasably connecting the movable plate to a predetermined position with respect to the stay, and the movable plate to the fixed plate by driving the servo motor. The mold thickness of the mold clamping device including the mold opening / closing means for relatively quickly and controllably moving and the mold clamping means for axially pressing the stay to which the movable plate is coupled with a relatively large force. Accordingly, the connecting position of the movable platen and the stay by the connecting device is such that the movable platen and the predetermined position of the stay movable on both the mold opening side and the mold closing side can be connected by the pressing of the mold clamping means. Is a method of adjusting
Both molds are arranged between the fixed platen and the movable platen, the movable platen is moved close to the fixed platen by the mold opening / closing means, and both molds are sandwiched between the fixed platen and the movable platen, and The mold thickness of the mold is measured based on the drive amount of the servomotor, the mold clamping means is positioned at the forward limit of the mold opening direction, and the mold clamping means is positioned at the forward limit of the mold opening direction. A predetermined position of the stay that can move the stay to both the mold opening side and the mold closing side by pressing the mold clamping means is calculated according to the calculated mold thickness, and the movable plate and the stay are moved according to the calculation. The movable platen is moved with respect to the stay by driving the servo motor of the mold opening / closing means so that the predetermined positions can be combined,
It is characterized in that the stay and the movable platen are coupled by a coupling means.

In order to solve the above-mentioned problems, the invention relating to the connecting position adjusting method of the mold clamping device according to the eleventh aspect of the present invention is such that a fixed plate to which one mold is attached and a movable close / retractable movement with respect to the fixed plate. The movable plate to which the stay is inserted and the other mold is attached, the connecting means for releasably connecting the movable plate to a predetermined position with respect to the stay, and the movable plate to the fixed plate by driving the servo motor. The mold thickness of the mold clamping device including the mold opening / closing means for relatively quickly and controllably moving and the mold clamping means for axially pressing the stay to which the movable plate is coupled with a relatively large force. Accordingly, the connecting position of the movable platen and the stay by the connecting device is such that the movable platen and the predetermined position of the stay movable on both the mold opening side and the mold closing side can be connected by the pressing of the mold clamping means. Is a method of adjusting
Both molds are arranged between the fixed platen and the movable platen, the movable platen is moved close to the fixed platen by the mold opening / closing means, and both molds are sandwiched between the fixed platen and the movable platen, and The die thickness of the die is measured based on the driving amount of the servo motor, the axial position of the stay is detected, and the die clamping means is pressed according to the measured die thickness and the axial position of the stay. By calculating the predetermined position of the stay that can move the stay to both the mold opening side and the mold closing side by the calculation, the position of the movable plate is determined from the reference position where it can be connected to the predetermined position of the stay. When on the closing side, the movable platen is moved to the reference position by the servo motor of the mold opening / closing means so that the movable platen can be connected to a predetermined position of the stay, and then the stay and the movable platen are connected by the connecting means. , The movable platen position is more than the reference position When the movable plate is on the mold opening side, the stay is first moved in the mold opening direction so that the position of the movable plate is closer to the mold closing side than the reference position, and then the servo motor of the mold opening / closing means is driven to move the movable plate to the mold opening side. It is characterized in that the stay and the movable platen are joined by the joining means after being moved to a predetermined position of the stay so that the stay can be joined.

In order to solve the above-mentioned problems, the invention according to the connecting position adjusting method of the mold clamping device according to claim 12 is such that a fixed plate to which one mold is attached and a movable close / retractable movement with respect to the fixed plate. The movable plate to which the stay is inserted and the other mold is attached, the connecting means for releasably connecting the movable plate and the predetermined position of the stay, and the movable plate to the fixed plate by driving the servo motor. Mold opening / closing means for relatively quickly and controllably moving, mold clamping means for axially pressing the stay to which the movable platen is coupled with relatively large force, mold opening side and mold closing side by pressing of the mold clamping means And a coupling position adjusting means for adjusting and moving the relative position of the movable platen and the stay so that the movable platen and the predetermined position of the movable stay can be combined. At the relative position of stay and movable plate during molding Flip and, as may be coupled with a predetermined position of the movable platen and the stay by coupling means, a method of adjusting the coupling position between the movable platen and the stay by coupling means,
The position of the stay in the axial direction when the molds are closed while the movable platen and the stay are connected at a predetermined position by the connecting means to adjust the mold thickness and perform the mold clamping is memorized, and after molding. After the stay is strongly opened by pressing the stay in the mold opening direction by a predetermined amount in the mold opening direction by the mold clamping means, the movable plate and the stay are disconnected from each other by the connecting means, and the servo motor of the connecting position adjusting means drives the stay. The position of the stay is changed from the position when the mold is strongly opened to the position where the predetermined position of the stay and the movable plate can be connected when the molds are closed to perform the stored mold clamping. At the same time as returning, the mold is opened by the mold opening / closing means to take out the molded product, both molds are closed, and the stay and the movable platen are connected by the connecting means.

In order to solve the above-mentioned problems, the invention relating to the connecting position adjusting method of the mold clamping device according to claim 13 is a fixed plate to which one mold is attached, and a movable close / retractable movement with respect to the fixed plate. The movable plate to which the stay is inserted and the other mold is attached, the connecting means for releasably connecting the movable plate to a predetermined position with respect to the stay, and the movable plate to the fixed plate by driving the servo motor. Of a mold clamping device comprising a mold opening / closing means for relatively quickly and controllably moving, and a mold clamping means for axially pressing a stay to which a movable plate is coupled with a relatively large force. Depending on the position of the stay in the axial direction, the movable platen and the predetermined position of the stay can be coupled so that the stay can be moved to both the mold opening side and the mold closing side by pressing the mold clamping means. Connection between movable plate and stay by connecting means A method of adjusting the position, in which both molds are closed by the mold opening and closing means and the mold is clamped by the mold clamping means, and the stay is pressed axially in the mold opening direction by the mold clamping means to strongly open the mold. , The movable platen is opened by the mold opening / closing means to take out the molded product without releasing the connection of the movable platen and the stay by the connecting means, and the stay is not moved in the axial direction, and the servo motor of the mold opening / closing device is driven. Characterized in that the movable plate is strongly opened to move to a position where the stay is disengaged, the movable plate and the stay are connected by a connecting means, and the stay is moved in the mold closing direction to close the mold. Is.

According to the first aspect of the present invention, dies are attached to the facing surfaces of the fixed plate and the movable plate, respectively, and the movable plate is guided to the stay between the fixed plate and the stay holder so that the movable plate comes close to or away from the fixed plate. It is possible to retreat. When the molds attached to the facing surfaces of the fixed plate and the movable plate are closed to each other, the movable platen is closed at a predetermined position where the mold of the stay is closed by driving the servo motor of the mold opening / closing means when the coupling means is released. Is moved relatively quickly to the fixed plate. Depending on the thickness of the mold (mold thickness) when the mold is closed, there is a relative positional relationship in which the half nut of the coupling means provided on the movable plate and the engaging portion of the stay cannot engage with each other. In such a case, the relative position between the movable platen and the stay is changed according to the mold thickness so that the connecting position adjusting means establishes a relative positional relationship in which the engaging portion of the stay can engage with the half nut of the connecting means. The position is adjusted and moved in the axial direction. In this state, the movable platen is releasably connected to the predetermined position of the stay by connecting the half nut provided on the movable plate to the engaging portion formed on the outer periphery of the stay, and the mold clamping is performed. The stay, to which the movable plate is coupled so as to clamp the mold by means of the means, is axially pressed in the mold closing direction to perform a predetermined molding. When molding is completed, the mold clamping force is used to forcefully open the mold with a relatively large force, the half nut is released from the engagement part of the stay, and the mold opening / closing means moves the movable plate away from the fixed plate relatively quickly. Then, the molded product is taken out of the mold. When the mold opening / closing means strongly opens the mold in the mold opening direction, the mold opening / closing means is in a free state. Also, during the mold opening, or when the mold opening is completed, the engagement portion of the stay has a positional relationship that can be engaged with the half nut of the coupling means in accordance with the mold pressure in the next molding cycle. To
The relative position between the movable plate and the stay is returned to the original position by driving the connecting position adjusting means.

According to the invention of claim 2, in the invention of claim 1, the half nut of the coupling means and the engaging portion at a predetermined position of the stay cannot engage with each other due to the thickness of the mold when the mold is closed. When there is a positional relationship, the stay position is moved by the coupling position adjusting means, and the position of the stay having the other end fixed to the stay holder is adjusted and moved in the axial direction. At this time, the fastening means connected at one end of the stay is driven. Then, with the driven position of the fastening means at this time as the origin, the fastening means provided on the fixed plate clamps the mold with a predetermined pressure.

According to a third aspect of the present invention, in the invention according to the first or second aspect, the movable platen is moved by a servo motor that rotationally drives a ball screw shaft arranged parallel to the stay of the mold opening / closing means. Is accurately controlled to close the mold, and the position of the half nut with respect to the engagement portion of the stay is detected from the rotational drive amount of the servo motor, so that the positional relationship between the half nut and the engagement portion of the stay can be engaged. It is determined whether there is.

According to a fourth aspect of the invention, in the first aspect of the invention, the half nut of the coupling means and the engagement portion of the stay are in a positional relationship that they cannot engage with each other due to the thickness of the mold when the mold is closed. In this case, with the mold clamping means in a free state, the control means controls and drives the servo motor of the mold opening / closing means based on the relative position between the movable platen and the stay detected by the detecting means of the coupling position adjusting means. The movable platen and the stay are relatively adjusted and moved to a position where the stay can be connected to the movable platen.

According to a fifth aspect of the present invention, in the invention according to the third or fourth aspect, one end of the ball screw shaft of the mold opening / closing means is rotatably supported around the shaft and is connected to the servo motor, and the other end. Since the end is rotatably and slidably supported around the axis by the ball screw shaft support means provided on the stay holder that is adjusted and moved in the axial direction of the stay by the connecting position adjusting means, the ball screw shaft is supported by its own weight. Is prevented from bending.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the coupling means sets the movable platen to a predetermined stay according to the mold thickness of the molds attached to the fixed platen and the movable platen. The coupling position adjusting means adjusts and moves the relative positions of the movable plate and the stay so that the movable plate and the stay can be coupled to each other.

According to a seventh aspect of the invention, in the invention according to any one of the first to third aspects, the connecting position is such that a predetermined position of the stay can be connected to the movable plate at the mold closing position during molding. The adjusting means adjusts and moves the position of the stay in the axial direction.

According to an eighth aspect of the present invention, in the invention according to the first or fourth aspect, the movable plate is connected to a predetermined position of the stay in a strong mold opening state separated from the mold closing position during molding. Therefore, the coupling position adjusting means adjusts and moves the position of the movable plate by driving the servo motor of the mold opening / closing means.

In the ninth aspect of the present invention, the two dies are arranged between the fixed plate and the movable plate, and the movable plate is moved closer to the fixed plate by the mold opening / closing means so that the two dies are fixed and the movable plate. The thickness of the mold is measured from the driving amount of the servo motor of the mold opening / closing means by sandwiching the mold between the mold and the mold. Then, in response to the measured mold thickness, the stay is movable so that the stay can be moved to both the mold opening side during strong mold opening and the mold closing side during mold clamping by pressing the mold clamping means. A predetermined position of the stay to which the board can be connected is calculated, and the servo motor of the connecting position adjusting means is driven according to the calculation result to relatively adjust and move the stay and the movable board. The mold thickness is adjusted so that the predetermined position and the movable plate can be connected.

According to the tenth aspect of the present invention, the two dies are arranged between the fixed plate and the movable plate, and the movable plate is moved close to the fixed plate by the mold opening / closing means so that both the molds are fixed and the movable plate. The thickness of the mold is measured from the driving amount of the servo motor of the mold opening / closing means by sandwiching the mold between the mold and the mold. On the other hand, the position of the stay becomes known by setting the mold clamping means in the state of being located at the forward limit of the mold opening direction. Therefore, without detecting the position of the stay, the movable plate can be connected to the movable plate by the connecting means in correspondence with the measured mold thickness, and the stay is pressed by the mold clamping means to close the mold opening side and the mold closing side. The predetermined position of the stay that can be moved to both of the positions is easily calculated. According to the calculation result, the servo motor of the mold opening / closing means is driven to adjust and move the movable platen to a predetermined position of the stay, and the mold thickness is adjusted by the connecting means so that the stay and the movable platen can be connected. .

In the eleventh aspect of the present invention, the two molds are arranged between the fixed plate and the movable plate, and the movable plate is moved close to the fixed plate by the mold opening / closing means to move the two molds to the fixed plate and the movable plate. By sandwiching it between the mold and the mold, the mold thickness of the mold is measured from the driving amount of the servo motor of the mold opening / closing means, and the position of the stay in the axial direction is detected. Then, according to the measured mold thickness and the axial position of the stay, a predetermined position of the stay that can move the stay to both the mold opening side and the mold closing side by pressing the mold clamping means is calculated. However, when the movable platen position is closer to the mold closing side than the reference position where the movable platen can be connected to the predetermined position of the stay according to the calculation, the movable platen is moved to the reference position by the servo motor of the mold opening / closing means. Then, the stay and the movable platen are connected by the connecting means. Further, when the position of the movable plate is on the mold opening side from the reference position, the stay is first moved in the mold opening direction so that the position of the movable plate is on the mold closing side from the reference position, and then the mold opening / closing means is opened. The movable platen is moved to the mold opening side by driving the servo motor so that the movable platen can be connected to a predetermined position of the stay, and then the stay and the movable platen are connected by the connecting means.

According to the twelfth aspect of the present invention, the movable platen is fixed to the predetermined position of the stay and the movable platen when the molds are closed by connecting the movable platen to the predetermined position of the stay by the connecting means to perform mold clamping during molding. The position of the stay that can be coupled with is stored, the stay is axially pressed and moved in the mold opening direction by the mold clamping means to strongly open the mold, and then the coupling of the movable plate and the stay by the coupling means is released. Then, by driving the servo motor of the connecting position adjusting means, the stay position is changed from the position when the mold is strongly opened to a predetermined stay position when both molds are closed to perform the stored mold clamping. The position and the movable platen are returned to a position where they can be connected to each other, and before and after this, the mold opening and closing means opens the mold to take out the molded product and both molds are closed, and the stay and the movable platen are connected by the connecting means. To join.

According to the thirteenth aspect of the invention, the two molds are closed by the mold opening / closing means and the mold is clamped by the mold clamping means, and the stay is axially pressed and moved in the mold opening direction by the mold clamping means to strongly open the mold. Then, the connection between the movable platen and the stay by the connecting means is released, the movable platen is opened by the mold opening / closing means, the molded product is taken out, and molding is performed. When the movable platen and the stay are uncoupled by this connecting means and the movable platen is opened, the mold clamping means is locked so as not to move the stay in the axial direction. By driving the movable platen to the position where the connection with the stay is released by driving the servo motor of the mold opening / closing means, the movable plate is surely connected to the predetermined position of the stay by the connecting means. After that, when the stay is moved in the mold closing direction by at least one of the mold clamping means and the mold opening / closing means, the mold of the movable plate coupled to the predetermined position of the stay appropriately closes the mold of the fixed plate.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION First, an embodiment of a mold clamping device of the present invention will be described with reference to FIGS. In the drawings, the same reference numerals denote the same or corresponding parts.

The mold clamping apparatus according to the present invention is roughly composed of a fixed platen 1 to which one mold (hereinafter referred to as a fixed mold) 3 is attached.
And a stay holder 5 arranged to face the fixed platen 1.
And a stay 6 whose one end is supported by the fixed platen 1 and whose other end is fixed to the stay holder 5, and which are close to the fixed platen 1.
Movable platen 2 to which the other mold (hereinafter, referred to as movable mold) 4 having a stay 6 inserted so as to be able to move back and forth is attached
And the half nut 27 provided on the movable plate 2 to the stay 6
The fixing plate 1 is driven by the connecting means 7 which is releasably connected to a predetermined position with respect to the engaging portion 25 of the and the servo motor 14.
On the other hand, with the mold opening / closing means 8 for moving the movable platen 2 relatively quickly and controllably, and the movable platen 2 is connected to the stay 6 by the connecting means 7, the molds 3 and 4 are movable so as to be clamped. A mold clamping means 9 for axially pressing the stay 6 coupled with the board 2 with a relatively large force, and a state in which the mold clamping means 9 can move the stay 6 to both the mold opening side and the mold closing side. so,
A connecting position adjusting means 10 for adjusting and moving the relative positions of the movable platen 2 and the stay 6 is provided so that the movable platen 2 can be connected to a predetermined position of the stay 6 by the connecting means 7.

In the mold clamping device in this embodiment, the mold clamping means 9 is provided on the fixed platen 1, and the stay 6
One end of the stay 6 is connected to the mold clamping means 9, the other end of the stay 6 is fixed to the stay holder 5, and the connecting position adjusting means 10 adjusts and moves the position of the stay 6 with respect to the movable plate 2 in the axial direction. Therefore, the drive means 11 for moving the stay holder 5 is provided. Further, in the mold clamping device in this embodiment, the mold opening / closing means 8 has a ball screw shaft 12 arranged in parallel with the stay 6, and a ball screw nut screwed to the ball screw shaft 12 provided on the movable platen 2. 13 and a servomotor 14 that drives the ball screw shaft 12 to rotate about its axis. In addition to this, a ball screw shaft support means 15 that supports the tip of the ball screw shaft 12 is provided in the stay holder 5. It is provided. Further, in the mold clamping device in this embodiment, the connecting position adjusting means 10 stays the movable platen 2 by the connecting means 7 according to the mold thickness of the molds 3 and 4 attached to the fixed platen 1 and the movable platen 2. 6 engaging part 2
The movable platen 2 and the stay 6 are adjusted and moved so that the movable platen 2 and the stay 6 can be connected to a predetermined position.
The connecting position adjusting means 10 adjusts and moves the axial position of the stay 6 so that the predetermined position of the engaging portion 25 of the stay 6 can be connected to the movable platen 2 at the mold closing position during molding. is there.

The fixed platen 1 is formed in a substantially rectangular shape and is immovably attached to one of the machine bases 16 (right side in FIGS. 1, 2 or 4 and 5). A fixed mold 3 is attached to the surface of the fixed platen 1 facing the movable platen 2. A hole 17 for inserting a nozzle (not shown) of the injection device into the center of the fixed plate 1 so as to abut against a sprue (not shown) of the fixed mold 3.
Are formed. Further, the end portions of the stays 6 are slidably inserted and supported at the respective corners (4 places) of the fixed plate 1 and are connected to the mold clamping means 9. Further, brackets 18 for fixing the servomotors 14 of the mold opening / closing means 8 are provided at diagonal positions (two locations) on both side surfaces of the fixed board 1.

A pair of guide rails 19 are laid on the other side of the machine base 16 (on the left side in FIGS. 1, 2 or 4 and 5) in parallel with the stay 6. The stay holder 5 is
Since the slide shoe 20 arranged so as to face the fixed platen 1 and provided below the fixed platen 1 is slidably supported on the guide rail 19, the stay 6 is axially moved (see FIG. 1, FIG. 2 or FIG. 4, it can be easily moved in the left-right direction in FIG. As shown in FIG. 3, the stay holder 5 is formed in a substantially rectangular frame shape. The corners of the stay holder 5 are fixedly supported by inserting the ends of the stays 6 and fastening the nuts 21. Has been done. At the position corresponding to the tip of the ball screw shaft 12 of the stay holder 5, the tip is inserted rotatably around the rotation axis and slidably in the axial direction. Stay holder 5
Is the end of the stay 6 and the ball screw shaft 12 of the mold opening / closing means 8.
It suffices that it has a strength capable of supporting an end portion (described later) of the above, and a so-called thinned frame structure (see FIG. 11) can be used for weight reduction.

The movable platen 2 is formed in a substantially rectangular shape, is arranged so as to face the fixed platen 1, and the stays 6 are slidably inserted through the corners thereof. . A movable mold 4 is attached to a surface of the movable platen 2 facing the fixed platen 1, and an ejector mechanism E for taking out a molded product after completion of molding is attached to a surface of the movable platen 2 facing the stay holder 5.
(See FIGS. 8 and 9). A slide shoe 24 is provided below the movable platen 2, and the slide shoe 24 is slidably supported on the guide rail 19.

The connecting means 7 includes a plurality of annular grooves or ridges (hereinafter collectively referred to as grooves) 25 formed as engaging portions on the outer periphery of the intermediate portion of each stay 6 over a predetermined axial range. A half nut 27, 2 in which a plurality of annular protrusions or grooves (hereinafter collectively referred to as protrusions) 26 are formed so as to be engageable with the inner peripheral surface in correspondence with the annular groove 25.
7 and the half nut 27 into the annular groove 25 of the stay 6.
Are moved closer to engage with each other, and the annular groove 25
And an actuator 28 that moves back and forth in order to release from. The half nut 27 has an axial width shorter than the axial range of the annular groove 25 of the stay 6, and is partially engaged with an arbitrary axial position of the annular groove 25 of the stay 6. can do. Groove 25 of stay 6
The pitch between the grooves 25, 25 is evenly formed (for example, 17 mm), and the protrusion 2 of the half nut 27 is formed.
6 is set so that a slight gap (see FIG. 16) is formed on both sides in the axial direction when engaging with the groove 25 of the stay 6. In the coupling means 7 in this embodiment, the half nut 27 is arranged on the surface of the movable platen 2 facing the stay holder 5, and further, the two sets of stays 6 and 6 adjacent to each other have an annular shape. A link mechanism 29 is provided which can synchronously move two sets of half nuts 27, which are respectively engaged with the groove 25, by a single actuator 28 to move toward and away from each other.

The mold opening / closing means 8 is arranged in parallel with the stay 6 by fixing the servo motors 14 provided with the rotary encoders 51 as movable plate position detecting means to the respective brackets 18 provided on the side surface of the fixed plate 1. One end of each ball screw shaft 12 is connected to the servomotor 14, and the vicinity of the other end of the ball screw shaft 12 is connected to the stay holder 5.
Ball screws which are rotatably supported by a ball screw shaft supporting means 15 provided on the shaft 15 and slidable relative to each other in the axial direction, and an intermediate portion of the ball screw shaft 12 is provided on the movable platen 2. The nuts 13 are screwed into each other. When the servo motor 14 is rotationally driven in a predetermined direction with the half nut 27 disengaged from the annular groove 25 of the stay 6, the slide shoe 24 is slidably supported on the guide rail 19 so as to be movable. 2 is a stay 6 inserted through a ball screw nut 13 to which a ball screw shaft 12 is screwed so as to move toward and away from the fixed platen 1.
It moves relatively quickly in the predetermined axial direction.
Further, when the servo motor 14 is rotationally driven in a predetermined direction while the half nut 27 is engaged with the annular groove 25 at the predetermined position of the stay 6, the ball screw shaft 12 is screwed through the ball screw nut 13. Movable plate 2 and stay 6
At the same time, the position of the piston 23 of the mold clamping means 9 can be moved. By detecting the amount of rotation of the servo motor 14 by the rotary encoder 51, the position of the movable platen 2 can be accurately and easily detected. The mold opening / closing means 8 is not limited to this embodiment provided at two positions, and the mold can be opened / closed while maintaining the parallel state of the movable platen 2 with respect to the fixed platen 1. It is also possible to dispose a plurality of locations or more.

The mold clamping means 9 is fitted into a cylinder 22 formed at a corner portion of the fixed platen 1, and is slidably fitted in the cylinder 22 in the axial direction. The stays 6 are connected to the mold clamping means 9. And a piston 23. When the working fluid is supplied to one chamber of the cylinder 22 with the half nut 27 engaged with the annular groove 25 of the stay 6,
The stay 6 connected to the piston 23 is pressed by a relatively large force in the axial direction to move to the mold opening side or the mold closing side,
The movable mold 4 is clamped against the fixed mold 3 and the mold is strongly opened. Further, as the stay 6 is pushed in the axial direction, the stay holder 5 connected to the tip of the stay 6 is connected.
The slide shoe 20 slides on the guide rail 19 and easily moves in the axial direction of the stay 6.

In the case of this embodiment, the connecting position adjusting means 10 is composed of a pair of columns 30 fixedly installed between the guide rails 19 of the machine base 16 and a pair of columns 30 arranged in parallel with the stay 6. A ball screw shaft 31 rotatably supported around the shaft, a ball screw nut 33 supported by a bracket 32 provided on the inner circumference of the stay holder 5 and screwed into the ball screw shaft 31, and a ball screw shaft 31. It is configured by a drive mechanism 34 that is rotationally driven around. In the case of the embodiment shown in FIG. 3, the drive mechanism 34 is
Pulley 35 provided on each ball screw shaft 31
A single servo motor 36 for rotationally driving each ball screw shaft 31 around the axis, a pair of pulleys 37, 38 provided in series with the rotary drive shaft of the servo motor 36, and each pulley 35-37. And a pair of belts 39 and 40 individually wound around 35 and 38. A single pulley (not shown) is provided on the rotary drive shaft of the servo motor 36, and a single belt (not shown) is wound around this pulley and each of the pulleys 35, 35. However, there is a case where the pulleys 35, 35 are not rotationally driven in synchronization due to the influence of the elongation of the single belt. Therefore, in this embodiment, the belts 39 and 40 are individually wound between the pair of pulleys 37 and 38 and the pulleys 35 and 35 arranged on the same axis, respectively.
Both ball screw shafts 31, 31 are rotationally driven in synchronism around the shafts. Then, when both ball screw shafts 31, 31 are rotationally driven in synchronism with each other by the drive of the servo motor 36, the stay holder 5 having the ball screw nut 33 screwed onto the ball screw shaft 31 is mounted on the guide rail 19. The annular groove 25 of the stay 6 fixedly supported by the stay holder 5 can be engaged with the annular ridge 26 at a predetermined position of the half nut 27 of the coupling means 7 provided on the movable platen 2. As described above, the position of the stay 6 is adjusted and moved in the axial direction with respect to the movable platen 2. That is, the joining position adjusting means 10 of the present invention is used for the fixed mold 3 during mold thickness adjustment or molding.
The axial position of the stay 6 is adjusted and moved so that a predetermined position of the engaging portion 25 of the stay 6 can be coupled to the movable platen 2 when the movable mold 4 and the movable mold 4 are matched. ing. The axial adjustment movement of the stay 6 is set so that the piston 23 of the mold clamping unit 9 can move the stay 6 to both the mold opening side and the mold closing side. Further, the stroke of the ball screw nut 33 with respect to the ball screw shaft 31, that is, the adjustment movement stroke in the axial direction from the default position of the stay 6 driven by the servo motor 36 of the coupling position adjusting means 10,
With the annular groove 25 formed in the stay 6 and the pitch (for example, 17 mm) of the annular ridge 26 of the half nut 27 of the coupling means 7, the movable platen 2 is strongly opened when the molding is completed. Together with the amount by which the stay 6 is retracted (for example, 20 mm) and the preliminary stroke amount (for example, 1
mm) and the total length.

Next, the method for adjusting the connecting position of the mold clamping device of the present invention will be described in detail by using the mold clamping device in the embodiment configured as described above. As described above, the mold clamping device used in the method of the present invention includes the fixed platen 1 to which the fixed mold 3 is attached, the movable platen 2 to which the movable mold 4 is attached, and the stay inserted into the movable platen 2. 6 and
The movable platen 2 is relatively quickly and controllably moved relative to the fixed platen 1 by driving the connecting means 7 for releasably connecting the movable platen 2 to a predetermined position of the engaging portion 25 of the stay 6 and the servo motor 14. The mold opening / closing means 8, the mold clamping means 9 that axially presses the stay with a relatively large force, and the mold clamping means 9 can move the stay 6 to either the mold opening side or the mold closing side. In the state, the connecting position adjusting means 10 for adjusting and moving the position of the stay 6 with respect to the movable plate 2 in the axial direction so that the movable plate 2 can be connected to a predetermined position of the stay 6.
And are equipped with. Then, the joining position adjusting method of the present invention is configured so that the stay 6 is moved to the mold opening side by the pressing of the mold clamping means 9 according to the outline, the mold thickness, or the axial position of the stay 6 at the time of molding. A method of adjusting the connecting position of the movable platen 2 and the stay 6 by the connecting means 7 so that the movable platen 2 can be connected to a predetermined position of the stay 6 that can be moved to both the closed side and The two dies 3 and 4 are arranged in a state of being matched with each other, and are arranged between the fixed platen 1 and the movable platen 2, and the movable platen 2 is fixed by the servo motor 14 of the mold opening / closing means 8.
The molds 3 and 4 are moved close to each other and sandwiched between the fixed platen 1 and the movable platen 2, and the mold thickness of the molds 3 and 4 is measured based on the drive amount of the servo motor 14 of the mold opening / closing means 8. Then, according to the mold thickness, the movable platen 1 is connected to a predetermined position of the stay 6 that allows the stay 6 to be moved to both the mold opening side and the mold closing side by pressing the mold clamping means 9. The position of the predetermined engaging portion 25 that can be moved is calculated, and the stay 6 is placed at the calculated predetermined position of the engaging portion 25 by driving the servo motor 36 of the coupling position adjusting means 10 to provide the half provided on the movable platen 2. The movable platen 2 is connected to a predetermined position of the annular groove 25 of the engaging portion of the stay 6 by moving the movable platen 2 with respect to the nut 27.

The mold 3, due to change of stages and maintenance,
When the mold thickness is adjusted when 4 is replaced with a different one, the servo motor 14 of the mold opening / closing means 8 drives the movable platen 2 away from the fixed platen 1 so that the two faces 1 and 2 face each other. The fixed mold 3 and the movable mold 4 in a mold matched state are arranged between the surfaces by suspending them with a crane, and the movable platen 2 is moved close to the fixed platen 1 by the drive of the servomotor 14 to move both molds. The molds 3 and 4 are sandwiched between the fixed platen 1 and the movable platen 2, and the molds are closed. Then, the fixed mold 3 and the movable mold 4 are attached to the fixed platen 1 and the movable platen 2, respectively. At this time, the rotary encoder 51, which is the movable platen position detecting means provided in the servo motor 14, operates in the servo motor 14
A signal for detecting the driving amount is output to a control means (not shown). In the control means, the rotary encoder 51
Based on the drive amount of the servo motor 14 output from
The mold thicknesses of the fixed mold 3 and the movable mold 4 in the mold closed state are calculated and obtained. When the value of the mold thickness is known, the value can be directly input to the control means.

The amount of rotation of the servo motor 14 is detected by the rotary encoder 51 and input to the control means (not shown), so that the annular groove 25 formed in the stay 6 is connected to the movable platen 2. The position of the annular projection 26 of the half nut 27 of the means 7 is also detected. In the control means (not shown), whether the annular groove 25 formed in the stay 6 and the annular ridge 26 of the half nut 27 of the coupling means 7 are in a positional relationship capable of engaging with each other according to the measured mold thickness. If it is determined that there is a positional relationship in which the two 25, 26 can be engaged with each other, the protrusion 28 of the half nuts 27, 27 is made to have an annular shape of the stay 6 by the actuator 28 of the coupling means 7 and the link mechanism 29. Groove 25
Engage with. On the other hand, both 2 depending on the measured mold thickness
When the positions 5 and 26 cannot be engaged (FIG. 4), the stay 6 is moved forward or backward so that the movable platen 2 can be engaged with the groove 25 at a predetermined position of the stay 6 with a minimum movement amount. The moving direction and the driving amount of the servo motor 36 of the coupling position adjusting means 10 are calculated so as to move, and the absolute position in the axial direction of the stay 6 obtained from the calculation result is stored, and the calculated result is stored. According to the above, the stay 6 is accurately adjusted and moved with respect to the half nut 27 provided on the movable platen 2 by driving the servo motor 36 of the combined position adjusting unit 10 (FIG. 5), and the connecting means provided on the movable platen 2 is moved. 7
The stay 6 is attached to the annular protrusion 26 of the half nut 27 of
The annular grooves 25 formed in the above are aligned, and then the protrusion 28 of the half nuts 27, 27 is engaged with the annular groove 25 of the stay 6 by the actuator 28 and the link mechanism 29 of the coupling means 7. At this time, the amount of forward or backward movement of the piston 23 driven in the cylinder 22 of the mold clamping means 9 (which is also the amount of axial adjustment movement of the stay 6 by the coupling position adjusting means 10) is formed in the stay 6. The pitches of the annular groove 25 and the annular ridge 26 of the half nut 27 of the coupling means 7 are each half or less. In the mold clamping device of the present invention described above, the connecting position adjusting means 10 is
The movable platen 2 can be connected to a predetermined position of the groove 25 of the stay 6 by the connecting position adjusting means 10 according to the mold thicknesses of the molds 3 and 4 attached to the fixed platen 1 and the movable platen 2. The position of the stay 6 relative to 2 is determined by the servo motor 3
6, a ball screw shaft 31 and a ball screw nut 33 are provided to drive and adjust the drive means 11. Further, in the present invention, since the stay 6 fixedly supported by the relatively lightweight stay holder 5 is moved in the axial direction, the load of the servo motor 36 of the coupling position adjusting means 10 can be small. The piston 23 of the mold clamping means 9 is moved along with the movement of the stay 6 in the axial direction.
Also moves in the cylinder 22, so the stay 6
The axial movement of the piston 23
It is set at a position where a stroke for performing a strong mold opening in the mold opening direction and a mold closing direction in the mold closing direction can be secured in the mold 2. When the servo motor 36 of the coupling position adjusting means 10 is driven, the mold clamping means 9 is set in a free state in which the piston 23 is driven in the cylinder 22 so that the stay 6 can be adjusted and moved in the axial direction. Has been done.

On the other hand, when molding is performed using the mold clamping device in which the mold thickness has been adjusted in this way, the servo motor 14 of the mold opening / closing means 8 is driven to bring the movable platen 2 closer to the fixed platen 1. The movable mold 4 is moved to abut against the fixed mold 3 to complete the mold closing. Then, by the actuator 28 of the coupling means 7 and the link mechanism 29, the half nut 27
The ridges 26 are engaged with the annular groove 25 of the stay 6. In this state, the cylinder 22 of the mold clamping means 9 is designed to perform mold clamping.
Working fluid is supplied to one of the chambers at a predetermined pressure, and the stay 6 connected to the piston 23 is driven so as to be pulled with a relatively large force, and the movable platen 2 connected to the stay 6 is fixed to the fixed platen 1. A pressing force is generated by pressing (1a in FIG. 6), and a predetermined molding material such as a melt-plasticized resin is injected into the cavities of the molds 3 and 4 at a predetermined timing. When the protrusion 26 of the half nut 27 and the annular groove 25 of the stay 6 are engaged with each other, a slight gap K (see 1f in FIG. 7 and FIG. 16) is formed on both sides in the axial direction. 6 1a, when performing mold clamping, between the side surface of the half nut 27 on the mold closing direction side (right side) of the protrusion 26 and the side surface of the annular groove 25 of the stay 6 on the mold opening direction side (left side). A gap 2K is formed.

After that, when the molding material is solidified, a working fluid is supplied to the chamber on the opposite side of the cylinder 22 of the mold clamping means 9 so as to strongly open the mold against the close contact between the molded product and the molds 3 and 4. Then, the stay 6 is pressed in the axial direction to move the movable platen 2 away from the fixed platen 1 by a predetermined amount (20 mm in the above example) (1b in FIG. 6). When performing this powerful mold opening, the stay 6 is moved in the mold opening direction with respect to the axial direction,
A gap 2K is formed between the mold opening direction side (left side) side surface of the protrusion 26 of the half nut 27 and the mold closing direction side (right side) side surface of the annular groove 25 of the stay 6. At this time, the servo motor 36 of the coupling position adjusting means 10 is free so that the ball screw shaft 31 can be driven to rotate with respect to the ball screw nut 32 so as not to hinder the axial movement of the stay 6 due to the strong mold opening. It is said that Further, when performing strong die opening, the ball screw shaft 12 screwed into the ball screw nut 13 can be driven around the shaft as the movable platen 2 moves away from the fixed platen 1. The servo motor 14 of the mold opening / closing means 8 is in a free state. When the force required for the strong mold opening is small, the powerful mold opening may be performed by rotating only the servomotor 14 of the mold opening / closing means 8 instead of driving the mold clamping means 9. When the force required for opening is large, the powerful mold opening may be performed by rotating the servo motor 14 of the mold opening / closing means 8 in addition to driving the mold closing means 9.

After the powerful mold opening is completed, the servo of the mold opening / closing means 8 is formed so that the gaps K are formed between both side surfaces of the protrusion 26 of the half nut 27 and the annular groove 25 of the stay 6. The motor 14 is driven (1c in FIG. 6), the actuator 28 of the coupling means 7 is driven, and the link mechanism 29 is driven.
The half nuts 27 are disengaged from each other by moving the respective half nuts 27 away from the stay 6 via. continue,
The servo motor 14 of the mold opening / closing means 8 is driven to move the movable platen 2 away from the fixed platen 1 by a predetermined amount to open the movable mold 4 with respect to the fixed mold 3 (1d in FIG. 7) to form a molded product. Is taken out by the ejector mechanism E (see FIGS. 8 and 9). Further, the coupling position adjusting means 10 is arranged so that the stay 6 moved in the axial direction by performing the strong mold opening by the mold clamping means 9 is returned to the positional relationship in which it can be engaged with the half nut 27 stored in the control means (not shown). Servo motor 36
Is driven (1e in FIG. 7). In the above-described mold clamping device of the present invention, the coupling position adjusting means 10 includes the protrusion 2 of the half nut 27 provided on the movable platen 2 at the mold closing position during molding.
6, the axial position of the stay 6 is adjusted and moved so that the groove 25 at a predetermined position of the stay 6 can be engaged with the stay 6. By driving the servo motor 36 of the adjusting means 10, it is accurately returned to the absolute position in the axial direction stored in the control means. That is, the stay 6 is axially adjusted and moved with respect to the movable platen 2 in a mold-closed state to a position where the protrusion 26 of the half nut 27 can be engaged with the predetermined annular groove 25 of the stay 6. . In addition, return of the stay (1 in FIG. 7)
e) may be performed at the same time as or before the mold opening (1d in FIG. 7).

Thereafter, in order to perform molding in the next cycle, the servo motor 14 of the mold opening / closing means 8 is driven to bring the movable mold 4 into contact with the fixed mold 3, and the stay 6 is moved to the connecting position adjusting means 10. Since the servo motor 36 is accurately returned to the absolute position in the axial direction stored in the control means by the drive of the servo motor 36, the protrusion 26 of the half nut 27 and the stay 6
With the annular groove 25 at a predetermined position so that a gap K is formed between both side surfaces thereof, and the actuator 28 of the coupling means 7 is driven to drive each half via the link mechanism 29. The nut 27 can be securely engaged with the groove 25 at the predetermined position of the stay 6 (1f in FIG. 7).

Next, another embodiment of the mold clamping device of the present invention will be described in detail with reference to FIGS. In addition, about the part similar to or equivalent to the above-mentioned embodiment,
The same reference numerals are given, the description thereof is omitted, and only different parts will be described.

In the mold clamping device according to this embodiment, the mold clamping means 9 is fitted into the cylinder 22 formed in the fixed platen 1 and the cylinder 22 in a manner similar to the above-described embodiments. It is composed of a piston 23 and
One end of the stay 6 is connected to the piston 23, and the other end of each stay 6 is fixedly supported by the stay holder 5. Further, the mold opening / closing means 8 includes a ball screw shaft 12 arranged in parallel with the stay 6, a ball screw nut 13 provided on the movable plate 2 and screwed to the ball screw shaft 12.
And a servomotor 14 for rotating the ball screw shaft 12 about its axis. Further, the servo motor 14 is provided with a rotary encoder 51 which is a movable plate position detecting means described later. On the other hand, the coupling position adjusting means (in this embodiment, the reference numerals are omitted) does not include the driving means 11 as in the above-described embodiment, and the servo motor 14 of the mold opening / closing means 8 is used. Detecting means (to be described later) that functions as the driving means 11 and detects the relative position of the movable platen 2 and the stay 6, and the mold clamping means 9 connected to the stay 6 detects the stay 6 based on the detection of this detecting means. The mold opening / closing is performed so that the movable platen 2 and the stay 6 are relatively moved to a position where the stay 6 can be coupled to the movable platen 2 in a state where the movable platen can be moved to both the mold opening side and the mold closing side. The control means (not shown) for controlling the drive of the servomotor 14 of the means 8 is provided.

The detecting means, as shown in FIG.
A stay holder position sensor 50 including a potentiometer and the like for detecting the position of the movable plate 2 and a rotary encoder 51 as a movable plate position detecting unit for detecting the position of the movable plate 2 are provided. Stay holder position sensor 50
Is provided between the upper surface of the machine base 16 and the stay holder 5 that fixedly supports the stay 6, and detects the position of the stay holder 5 in the direction along the guide rail 19 (left-right direction in FIG. 8). Then, based on this detection, the control means calculates the axial position of the stay 6 fixed to the stay holder 5. In addition, the rotary encoder 51
Detects the rotational drive amount of the servomotor 14 that moves the movable platen 2 closer to and farther from the fixed platen 1, and the control means calculates the position of the movable platen 2 based on this detection.

The control means (not shown) is provided with a groove 25 provided in the stay 6 based on signals output from the stay holder position sensor 50 and the rotary encoder 51, respectively.
The relative position between the axial position of the mold and the half nut 27 provided on the movable platen 2 is calculated, and the mold clamping means 9 causes the stay 6 to move.
The ridge 2 of the half nut 27 in the groove 25 of the stay 6 in a state in which the mold can be moved to both the mold opening side and the mold closing side.
It is determined whether or not 6 can be engaged, and when it is determined that it is not in the engageable position, the groove 25 of the stay 6 and the protrusion 26 of the half nut 27 of the movable plate 2 can be engaged. The position is calculated, and the drive of the servomotor 14 of the mold opening / closing means 8 is controlled so that the movable platen 2 is adjusted and moved relative to the stay 6 to this position.

In the mold clamping device according to this embodiment, as described above, the detection means for detecting the relative position between the movable platen 2 and the stay 6 is provided, and the servo motor 14 of the mold opening / closing means 8 is one of the coupling position adjusting means. By configuring the stay 6 so that the position of the stay 6 can be adjusted, the connecting position adjusting means 10 can have a simple structure. Therefore, the cost can be significantly reduced, and
The control can be easily performed.

Next, another embodiment for adjusting the mold thickness of the method for adjusting the coupling position of the mold clamping device of the present invention will be described with reference to FIGS.
A case of using the mold clamping device in another embodiment configured as shown in FIG. 11 will be described in detail with reference to FIGS. 12 to 22. In the description of this embodiment, only the parts different from the above-described embodiment will be described, and the same or corresponding parts as those in the above-mentioned embodiment will be denoted by the same reference numerals and the description thereof will be omitted.
As described above, the coupling position adjusting means of the mold clamping device used in the method of the present invention has the mold opening / closing means 8 as its driving means.
The servo motor 14 is configured to function, and includes a stay holder position sensor 50 that detects the axial movement of the stay 6, and a rotary encoder 51 that detects the position of the movable plate from the rotation amount of the servo motor 14. And the stay 6 based on the detection of this detection means.
Control means for controlling the drive of the servomotor 14 of the mold opening / closing means 8 so as to relatively move the movable platen 2 and the stay 6 to a position where they can be coupled to the movable platen 2.
When the mold clamping device configured as described above is used to adjust the mold thickness, the bonding position adjusting method of the present invention roughly measures the mold thickness when the molds 3 and 4 are closed. Of the stay 6 which detects the axial position of the stay 6 with respect to the half nut 27 at this mold thickness and can move the stay 6 to both the mold opening side and the mold closing side by pressing the mold clamping means 9. The servo motor 14 of the die opening / closing means 8 which functions as a driving means of the coupling position adjusting means 10 by calculating the position of the annular groove 25 of a predetermined engaging portion capable of connecting the predetermined position with the movable platen 2. By driving, the half nut 27 provided on the movable platen 2 is moved to the calculated position of the predetermined engaging portion 25 of the stay 6, and the coupling means 7 causes the annular groove 25 of the engaging portion of the stay 6 to move. The movable platen 2 is connected to the predetermined position of Than it is.

The mold 3 is changed by changing the stage or maintenance.
When the mold thickness is adjusted when 4 is replaced with a different one, the servomotor 14 of the mold opening / closing means 8 drives the movable platen 2 away from the fixed platen 1 so that the two faces 1 and 2 face each other. A new fixed mold 3 and a movable mold 4 in a matched state are placed between the surfaces by hanging them with a crane, and as shown in FIGS.
The movable platen 2 is moved closer to the fixed platen 1 by driving 4 and the molds 3 and 4 are sandwiched between the fixed platen 1 and the movable platen 2 to close the molds. The fixed mold 3 and the movable mold 4 are attached to each. At this time, the rotary encoder 51, which is the movable platen position detection means provided in the servo motor 14, outputs a signal for detecting the drive amount of the servo motor 14 and outputs it to the control means (not shown). The control means, based on the drive amount of the servo motor 14 output from the rotary encoder 51, the distance between the facing surfaces of the fixed plate 1 and the movable plate 2, that is, the fixed mold 3 and the movable mold in the mold closed state. The mold thickness of the mold 4 is calculated and obtained (S1 in FIG. 12). Further, in the control means, the half nut 27 of the coupling means 7 provided on the movable platen 2 is determined from the drive amount of the servo motor 14 output from the rotary encoder 51.
The position of the annular ridge 26 is detected. Further, the control means calculates and obtains the axial position of the stay 6 based on the signal output from the stay holder position sensor 50.

Then, in the control means, the measured mold thickness is engaged in the groove 25 in consideration of the strokes of the mold clamping means 9 in the mold opening direction and the mold closing direction required at the time of molding. A groove 25 at a predetermined position that is optimal for the stay 6 is formed from the relative position in the axial direction of the protrusion 26 of the half nut 27 provided on the movable platen 2 with respect to the groove 25 at the determined position. It is determined whether or not the annular groove 25 and the annular ridge 26 of the half nut 27 of the coupling means 7 are in a position to engage with each other, and the two are in a position to engage with each other. If it is determined that the connection means 7
The protrusion 28 of the half nut 27 is engaged with the annular groove 25 of the stay 6 by the actuator 28 and the link mechanism 29.

On the other hand, depending on the measured mold thickness, both 25,
When it is determined that 26 is in a positional relationship that cannot be engaged, the control means performs the following processing. That is, when adjusting the mold thickness, roughly, the relative position between the predetermined position of the stay 6 and the movable platen 2 is axially displaced with respect to the reference position at which the movable plate 2 can be properly coupled by the coupling means 7 and cannot be engaged. When the movable platen 2 is displaced in the mold closing direction with respect to the predetermined position of the stay 6, the movable platen 2 is used as a reference by the servo motor 14 of the mold opening / closing means 8 functioning as a coupling position adjusting means. On the other hand, when the movable platen 2 is displaced in the mold opening direction with respect to the predetermined position of the stay 6, the stay 6 is moved to the mold closing direction side from the reference position by the mold clamping means. After moving in the mold opening direction,
The movable platen 2 is moved to the reference position and engaged by the servo motor 14 of the mold opening / closing means 8 which functions as a coupling position adjusting means.

FIG. 14 is a partially enlarged view of FIG. 13 for explaining a reference position (shown by a chain line) when the half nut 27 is engaged with or released from the groove 25 of the stay 6. It has been shown. At the reference position shown by the chain line in FIG. 14, a predetermined gap K (for example, 1 mm each) is formed in the axial direction on the side surface between the protrusion 26 of the half nut 27 and the groove 25 of the stay 6. Has become. In the embodiment shown in FIG. 14, a case where the half nut 27 is axially displaced from the reference position toward the fixed plate, that is, in the mold closing direction (hereinafter, referred to as the − (minus) direction) and cannot be engaged. Shows. In the control means, the reference position of the engageable half nut 27 in which the predetermined gap K is formed with respect to the groove 25 of the stay 6 which is optimum for engagement in consideration of the stroke of the mold clamping means 9 is set to 0. As a point, it is determined whether or not the axial position X of the protrusion 26 of the half nut 27 with respect to the groove 25 of the stay 6 is 0 point (S2 in FIG. 12), and as shown in FIG. When the position is shifted to the − side (X <0), the half nut 27 provided on the movable platen 2 is moved to the 0 position on the stay holder side, that is, the mold opening direction (hereinafter, + (plus)).
The servo motor 14 is driven so as to move in the direction (referred to as “direction”) (S3 in FIG. 12). At this time, the fixed mold 3 attached to the fixed plate 1 and the movable mold 4 are integrated and suspended by a crane or the like, and the movable mold 4 is still attached to the movable plate 2. Therefore, the movable platen 2 and the movable mold 4 are separated from each other.

While the servomotor 14 is being driven, whether or not the axial position X of the protrusion 26 of the half nut 27 with respect to the groove 25 of the stay 6 has reached 0 (Yes) or not (N)
o) is determined (S4 in FIG. 12), and the position X in the axial direction of the protrusion 26 of the half nut 27 has not reached the 0 point (No in S4 in FIG. 12), the servomotor 14
Drive is continued (return to S3 in FIG. 12). And
FIG. 15 and FIG. 1 from the state shown in FIG. 13 and FIG.
As shown in FIG. 6, when it is detected from the rotational drive amount of the servo motor 14 that the axial position X of the protrusion 26 of the half nut 27 has reached 0 point, the rotational drive of the servo motor 14 is stopped (FIG. 12). S5). After that, the half nuts 27 are moved close to the stay 6 via the link mechanism 29 by the drive of the actuator 28 (FIGS. 8 and 10), and the protrusions 26 of the half nuts 27 are formed into an annular shape which is an engaging portion of the stay 6. The groove 25 is engaged and locked (S6 in FIG. 12).

Next, as shown in FIGS. 17 and 18, the servo motor 14 is driven to stay 6 together with the half nut 27 provided on the movable platen 2 until the movable platen 2 collides with the movable mold 4. Is moved to the right in the figure in the axial direction. At this time, the protrusion 26 of the half nut 27 and the stay 6
Since the side surfaces of the groove 25 and the groove 25 contact each other, a predetermined gap 2K (for example, 2 mm each) is formed in the axial direction between the side surfaces opposite to the contact side surface.
Then, when the adjustment of the mold thickness is completed, the molds 3 and 4 are fixed to the stationary platen 1.
And attach it to the movable platen 2. The mold thickness may be adjusted by attaching the molds 3 and 4 to the fixed platen 1 and the movable platen 2 from the beginning.

On the other hand, in S2 of FIG. 12, when it is determined that the position of the half nut 27 is coincident with the position 0 in the axial direction (X = 0), the protrusion 26 of each half nut 27 is immediately executed. Is engaged / locked with the annular groove 25 of the stay 6 (S6 in FIG. 12). Further, in S2 in FIG. 12, as shown in FIGS. 19 and 20, the position of the half nut 27 is the reference position (described above). When it is deviated to the + side from the 0 point (X> 0), as shown in FIGS. 21 and 22, the extension drive side cylinder chamber of the cylinder 22 of the mold clamping means 9 (in FIG. 21, it is more than the piston 23). A working fluid is supplied to the right cylinder chamber) to move the stay 6 in the mold opening direction (S7 in FIG. 12). During the movement of the stay 6 by driving the mold clamping means 9, has the 0 point of the groove 25 of the stay 6 moved to the mold opening side from the axial position X of the protrusion 26 of the half nut 27 (Yes)? It is determined whether or not (No) (S8 in FIG. 12). When the zero point of the groove 25 of the stay 6 has not moved to the mold opening side from the axial position X of the protrusion 26 of the half nut 27 (in the case of No), the stay 6 by the mold clamping means 4 is used. Extension drive is continued (Fig. 1
Return to S7 of 2.) The 0 point of the groove 25 of the stay 6 is shown in FIG.
22 and the protrusion 26 of the half nut 27 as shown in FIG.
When the position of the stay 6 coincides with the axial position X or moves to the mold opening side from this position X (in the case of Yes), the movement of the stay 6 is stopped (S9 of FIG. 12), and shown in FIGS. Similarly, by driving the servomotor 14, the protrusion 26 of the half nut 27 is moved in the mold opening direction to a position where it can be engaged with the annular groove 25 of the stay 6, and the half nut 27 is engaged with the stay 6. (S3 to S6 in FIG. 12).

In this embodiment, the mold thickness of the molds 3 and 4 sandwiched between the fixed platen 1 and the movable platen 2 is measured based on the rotational driving amount of the servo motor 14 of the mold opening / closing means 8. A predetermined position where the protrusion 26 of the half nut 27 can be connected to the groove 25 of the stay 6 is calculated, and the movable platen 2 is accurately moved to the calculated predetermined position by the servo motor 14 of the mold opening / closing means 8. Then, the stay 6 is connected by the connecting means 7.
The mold thickness can be easily and accurately adjusted only by retracting the stay 6 connected to the movable platen 2 by the mold opening / closing means 8 in the mold closing direction by a predetermined amount. Then, in the mold clamping device of this embodiment, the connecting position adjusting means 10 stays the movable platen 2 by the connecting means 7 according to the mold thickness of the molds 3 and 4 attached to the fixed platen 1 and the movable platen 2. 6, the relative position of the movable platen 2 with respect to the stay 6 is provided with a servo motor 14, a ball screw shaft 12, and a ball screw nut 13 so that the movable plate 2 can be connected to a predetermined position of the engaging portion 25 of the mold 6. 8, it is configured to be adjusted and moved.

Next, another embodiment of the method for adjusting the coupling position of the mold clamping device of the present invention during molding will be described with reference to FIGS.
A case of using the mold clamping device in the embodiment configured as shown in FIG. 23 will be described in detail with reference to FIGS. 23 and 24. In the description of this embodiment, only the parts different from the above-described embodiment will be described, and the same or corresponding parts as those in the above-mentioned embodiment will be denoted by the same reference numerals and the description thereof will be omitted. The method for adjusting the coupling position of the mold clamping device according to the present invention roughly moves the stay 6 to both the mold opening side and the mold closing side by the pressing of the mold clamping means 9 according to the axial position of the stay during molding. A method for adjusting the connecting position of the movable platen 2 and the stay 6 by the connecting means 7 so that the movable platen 2 can be connected to a predetermined position of the engaging portion 25 of the stay 6 which can be formed. The molds 3 and 4 are closed by the opening / closing means 8 and the mold is clamped by the mold clamping means 9, and the stay 6 is axially pressed and moved in the mold opening direction by the mold clamping means 9 to strongly open the mold, At the position where the mold is opened, the movable platen 2 is opened by the mold opening / closing means 8 without releasing the connection between the movable platen 2 and the stay 6 by the connecting means 7 and moving the stay 6 in the axial direction. The movable platen 2 is removed by driving the servo motor 14 of the mold opening / closing means 8. It is moved to a position releasing the coupling of the stay 6 at the time of opening heavy duty, the movable platen 2 by coupling means 7
And the stay 6 are coupled, and the stay 6 is moved in the mold closing direction by the mold clamping means 9 to close the mold.

When molding is performed by using the mold clamping device in which the mold thickness is adjusted as shown in FIGS. 12 to 22, the connecting means 7 causes the protrusion 26 of the half nut 27 to move into the annular groove 25 of the stay 6. The movable platen 2 is moved closer to the fixed platen 1 by driving the servo motor 14 of the mold opening / closing means 8 or the mold clamping means 9 in a state of being engaged with the movable mold 4 against the fixed mold 3. And mold closing is completed. In this state, the working fluid is supplied to one chamber of the cylinder 22 of the mold clamping means 9 at a predetermined pressure so as to perform the mold clamping.
By driving the stay 6 connected to 3 with a relatively large force, the movable platen 2 connected to the stay 6 is pressed against the fixed platen 1 to generate a mold clamping force (2a in FIG. 23). A predetermined molding material such as a melted plasticized resin is injected into the cavities of the molds 3 and 4 at a predetermined timing. When the protrusion 26 of the half nut 27 and the annular groove 25 of the stay 6 are engaged, a slight gap K (see 1f in FIG. 7 and FIG. 16) is formed on both sides in the axial direction. When the mold is clamped as shown in 2a of 23, between the side surface of the protrusion 26 of the half nut 27 in the mold closing direction (right side) and the side surface of the annular groove 25 of the stay 6 in the mold opening direction (left side). A gap 2K is formed.

After that, when the molding material solidifies, a working fluid is supplied to the chamber on the opposite side of the cylinder 22 of the mold clamping means 9 in order to strongly open the mold against the close contact between the molded product and the molds 3 and 4. Then, the stay 6 is pressed in the axial direction to move the movable platen 2 away from the fixed platen 1 by a predetermined amount (20 mm in the above-described example) (2b in FIG. 23). When performing this powerful mold opening, the stay 6 is moved in the mold opening direction with respect to the axial direction,
A gap 2K is formed between the mold opening direction side (left side) side surface of the protrusion 26 of the half nut 27 and the mold closing direction side (right side) side surface of the annular groove 25 of the stay 6. At this time, as the movable platen 2 moves away from the fixed platen 1, the ball screw shaft 12 screwed into the ball screw nut 13 can be driven around the axis so that the mold opening / closing means 8 can be driven. The servo motor 14 is in a free state. When the force required for the strong mold opening is small, the powerful mold opening may be performed by rotating only the servomotor 14 of the mold opening / closing means 8 instead of driving the mold clamping means 9. When the force required for opening is large, the powerful mold opening may be performed by rotating the servo motor 14 of the mold opening / closing means 8 in addition to driving the mold closing means 9. When the die is strongly opened by only the servomotor 14, the side surface of the protrusion 26 of the half nut 27 and the annular groove 25 of the stay 6 are opened.
The gap between the side surface and the side surface is different from that described above.

After the strong mold opening is completed, the servo of the mold opening / closing means 8 is formed so that a gap K is formed between both side surfaces of the protrusion 26 of the half nut 27 and the annular groove 25 of the stay 6. The motor 14 is driven (2c in FIG. 23), the actuator 28 of the coupling means 7 is driven, and the link mechanism 29 is driven.
The half nuts 27 are disengaged from each other by moving the respective half nuts 27 away from the stay 6 via. The axial position of the half nut 27 released from the stay 6 is stored in a control unit (not shown). Next, the servo motor 14 of the mold opening / closing means 8 is driven to move the movable platen 2 away from the fixed platen 1 by a predetermined amount to open the movable mold 4 with respect to the fixed mold 3 (2d in FIG. 24). , The molded product is taken out by the ejector mechanism E (see FIGS. 8 and 9).
Further, by stopping the supply / discharge of the working fluid to / from the cylinder 22 of the mold clamping means 9, the stay 6 connected to the piston 23 is locked so as not to move in the axial direction. Therefore, the axial position of the annular groove 25 of the stay 6 is also locked without moving.

After that, in order to perform molding in the next cycle, the servo motor 14 of the mold opening / closing means 8 is driven to lock the half nut 27 provided on the movable plate 2 in a state where the mold is strongly opened. The position released from the stay 6 is accurately returned to the absolute position in the axial direction stored in the control means (not shown) (2e in FIG. 24).
That is, by driving the servo motor 14 of the mold opening / closing means 7, the movable platen 2 is moved to a position where the connection with the stay 6 when the mold is strongly opened is released, and the connecting plate 8 connects the movable platen 2 and the stay 6. To do. Since the servo motor 14 of the mold opening / closing means 8 is accurately returned to the absolute position in the axial direction (the position where the mold has been opened strongly) stored in the control means, the protrusion 26 of the half nut 27 is The stay 6 and the annular groove 25 at a predetermined position surely coincide with each other so that a gap K is formed between both side surfaces thereof. Therefore, each half nut 27 can be securely engaged with the groove 25 at a predetermined position of the stay 6 via the link mechanism 29 by driving the actuator 28 of the coupling means 7. In the mold clamping device of this embodiment, the coupling position adjusting means 10 is
In order to be able to connect the protrusion 26 of the half nut 27 provided on the movable plate 2 to the groove 25 at a predetermined position of the stay 6 in the strong mold open state separated from the mold closed position at the time of molding, By driving the servo motor 14 of the mold opening / closing means 8 to adjust and move the position of the movable platen 2 with respect to the stay 6, the movable platen 2 of the servo motor 14 of the mold opening / closing means 8 functioning as a coupling position adjusting means. The drive accurately returns to the absolute position in the axial direction stored in the control means. That is, the movable platen 2 is axially adjusted and moved with respect to the stay 6 to a position where the protrusion 26 of the half nut 27 can be engaged with the predetermined annular groove 25 of the stay 6. When the protrusion 26 of the half nut 27 is engaged with the annular groove 25 of the stay 6 by the coupling means 7, the servo motor 14 of the mold opening / closing means 8 or the mold clamping means 9 is driven to move the fixed platen 1. The board 2 is moved in close proximity to cause the fixed mold 3 to collide with the movable mold 4 to close the mold. In addition,
The mold clamping device to which the connecting position adjusting method of this embodiment can be applied is not limited to the one configured as shown in FIGS. 8 to 11, and the mold shown in FIGS. It can also be applied to a fastening device.

Next, still another embodiment of the method for adjusting the coupling position of the mold clamping device of the present invention will be described in detail with reference to FIGS. 25 and 26. In the description of this embodiment as well, only the parts different from the above-described embodiment will be described, and the same or corresponding parts as those in the above-mentioned embodiment will be denoted by the same reference numerals and the description thereof will be omitted. First, an embodiment of the mold clamping device used in the method of the present invention will be described. The mold clamping device in this embodiment is similar to the above-described embodiments, in general, the fixed plate 1 to which the fixed mold 3 is attached, and the stay 6 so as to be able to move toward and away from the fixed plate 1. The movable platen 2 into which the movable mold 4 is attached, the connecting means 7 for releasably connecting the movable platen 2 to the predetermined position with respect to the stay 6, and the fixed platen 1 by driving the servomotor 14. A mold opening / closing means 8 for relatively quickly and controllably moving the movable platen 2, and a mold clamping means 9 for axially pressing the stay 6 coupled with the movable platen 2 with a relatively large force. . However,
The mold clamping device in this embodiment does not include the coupling position adjusting means 10 for adjusting and moving the relative positions of the movable platen 2 and the stay 6, and has a simple configuration.

The connecting position adjusting method of the present invention using the mold clamping device having the above-mentioned structure generally has the mold opening side and the mold closing side by the pressing of the mold clamping means 9 according to the mold thickness of the molds 3 and 4. By a method of adjusting the connecting position of the movable platen 2 and the stay 6 by the connecting means 7 so that the movable platen 2 can be connected to the engaging portion 25 of the stay 6 which is movable on both sides. There
The two molds 3 and 4 are arranged in a state of being matched with each other, and are arranged between the fixed platen 1 and the movable platen 2, and the movable platen is moved close to the fixed platen by a mold opening / closing means so that both molds are fixed and movable platen. The mold thickness of the molds 3 and 4 is measured on the basis of the driving amount of the servo motor 14 of the mold opening / closing means 8 and the mold clamping means 9 is positioned at the forward limit of the mold opening direction. In the state where the clamping means 9 is located at the forward limit of the mold opening direction, the measured mold 3,
According to the thickness of the mold 4, the stay 6 is pressed by the pressing means 9.
A predetermined position of the engaging portion 25 of the stay 6 that can move the mold to both the mold opening side and the mold closing side is calculated, and according to this calculation, a predetermined position of the engaging portion 25 of the movable plate 2 and the stay 6 is calculated. The movable platen 2 is moved with respect to the stay 6 by driving the servo motor 14 of the mold opening / closing means 8 so that the positions can be combined, and the stay 6 and the movable platen 2 are connected by the connecting means 7. Further, in the method for adjusting the connecting position of the mold clamping device of the present invention, after the movable platen 2 is connected to the stay 6 by the connecting means 7, the stay 6 connected to the movable platen 2 by the mold opening / closing means 8 is placed in the mold closing direction. It is a fixed amount of retreat.

The mold 3 is changed by changing the stage or maintenance.
When adjusting the mold thickness when 4 is replaced with a different one, the new fixed mold 3 and the movable mold 4 are aligned (mold closed) and integrated and then suspended by a crane. Then, the fixed mold 1 is mounted between the fixed plate 1 and the movable plate 2 which are separated from each other, and the fixed mold 3 is attached to the fixed plate 1. After that, FIG.
As shown in FIG. 3, by driving the servo motor 14 of the mold opening / closing means 8, the movable platen 2 is moved closer to the fixed platen 1 so that the movable platen 2 abuts against the movable mold 4, and both molds 3 are moved. 4 is sandwiched between the fixed platen 1 and the movable platen 2. Then, the position of the movable platen 2 is detected based on the rotational drive amount of the servo motor 14 by the output signal from the movable platen position detection means (not shown), and the distance between the facing surfaces of the fixed platen 1 and the movable platen 2, that is, , Mold thickness is measured. Further, in the control means, the piston 23 of the mold clamping means 9 is positioned at the forward limit of the mold opening direction before and after the mold thickness measurement. Therefore, the position of each annular groove 25 of the stay 6 connected to the piston 23 is known. Note that the forward limit position actually includes a preliminary stroke amount (for example, 1 mm), and the piston 23 does not have to completely abut against the front end wall of the cylinder 22.

Then, as shown in FIG. 26, by driving the servo motor 14 of the mold opening / closing means 8, the protrusion 26 of the half nut 27 provided on the movable plate 2 is engaged with the predetermined groove 25 of the stay 6. Half nut 27 in a position where it can be
Is moved together with the movable platen 2. At this time, the movable mold 4 is integrated with the fixed mold 3 and is hung by a crane or the like, and the movable mold 4 is not yet attached to the movable platen 2. The mold 4 and the mold 4 are separated from each other.

Thereafter, as shown in FIG. 27, the protrusion 26 of the half nut 27 is engaged with the groove 25 of the stay 6, and the servo motor 14 is rotated until the movable platen 2 abuts against the movable mold 4. The stay 6 along with the half nut 27 provided on the movable plate 2 is driven to retract in the axial direction rightward in the drawing by a predetermined amount to move backward. The predetermined position where the protrusion 26 of the half nut 27 is engaged with the groove 25 of the stay 6 is the above-described preliminary stroke amount (for example, 1 mm) and the strong mold opening amount (when the stay is moved backward). (For example, 20 mm)
The stroke is determined to be a position where the stroke can be secured.
Therefore, it is possible to reliably secure an unnecessary stroke for moving the stay 6 to both the closing side and the mold opening side when the stay 6 is molded by the mold clamping means 9.

In this embodiment, even if the mold clamping device has a simple structure and is not specially provided with the connecting position adjusting means 10 including the stay holder position sensor 50 for detecting the movement of the stay 6 in the axial direction, By setting the tightening means 9 in the forward limit of the mold opening direction, the groove 2 of the stay 6 is moved.
Since the position of 5 is known, the protrusion 26 of the half nut 27 can be easily and accurately formed in the groove 25 of the stay 6 in a short time from the rotational drive amount detected by the rotary encoder 51 of the servo motor 14. Can be engaged.

The method for adjusting the connecting position of the mold clamping device of the present invention is not limited to this embodiment, but can be applied to the mold clamping device having the connecting position adjusting means 10 as described above. . In addition, after the protrusion 26 of the half nut 27 is engaged with the groove 25 of the stay 6, the stay 6 is pivoted together with the half nut 27 provided on the movable plate 2 until the movable plate 2 collides with the movable mold 4. The backward movement in the right direction in the figure can also be driven by the mold clamping means 9. Further, the advance limit position of the piston 23 in the cylinder 22 of the mold clamping means 9 can be configured to be the completion position of the strong mold opening.

[0081]

According to the invention of claim 1, since the connecting position adjusting means adjusts and moves the position of the stay in the axial direction thereof, the mold opening / closing can be easily performed in response to the change of the mold thickness of the held mold. It is possible to provide a mold clamping device capable of easily and surely coupling the half nut of the movable plate and the engagement portion of the stay moved to a predetermined position by the means.

According to the invention of claim 2, in the invention of claim 1, the connecting position adjusting means moves the stay holder to facilitate the position of the engaging portion of the stay with respect to the half nut of the movable plate. Further, it is possible to provide a mold clamping device that can be reliably adjusted and moved.

According to the invention of claim 3, in the invention of claim 1 or 2, the die opening / closing means accurately adjusts the position of the stay with respect to the half nut by a relatively small servomotor for accurate positioning. It is possible to provide a mold clamping device that can do this.

According to the invention of claim 4, in the invention of claim 1, the connecting position adjusting means detects the relative position of the movable plate and the stay, and based on the detection of the detecting means, The movable platen has a simple configuration including a control unit that controls the drive of the servomotor of the mold opening / closing unit so that the movable platen and the stay are relatively moved to a position where the stay can be coupled to the movable platen. It is possible to provide a mold clamping device capable of easily and reliably adjusting and moving the position of the engagement portion of the stay with respect to the half nut.

According to the invention of claim 5, in the invention of claim 3 or 4, the ball screw shaft supporting means for supporting the end portion of the ball screw shaft is provided in the stay holder, whereby the ball of the mold opening / closing means is provided. It is possible to provide a mold clamping device that can prevent the tip of the screw shaft from bending downward due to its own weight or the like.

According to the invention of claim 6, in the invention according to any one of claims 1 to 5, the coupling position adjusting means is
The relative position of the movable platen and the stay is adjusted and moved so that the movable platen can be connected to a predetermined position of the stay by the connecting means according to the mold thickness of the mold attached to the fixed platen and the movable platen. Thus, it is possible to provide a mold clamping device that can easily and reliably adjust and move the position of the stay engagement portion with respect to the half nut of the movable plate during mold thickness adjustment.

According to the invention of claim 7, in the invention according to any one of claims 1 to 3, the connecting position adjusting means is:
By adjusting and moving the axial position of the stay so that the predetermined position of the stay can be connected to the movable plate at the mold closing position during molding, the stay of the stay with respect to the half nut of the movable plate during molding can be changed. It is possible to provide a mold clamping device that can easily and reliably adjust and move the position of the engaging portion.

According to the invention of claim 8, in the invention according to claim 1 or 4, a predetermined stay of the stay when the connecting position adjusting means is in a strong mold open state separated from the mold closing position at the time of molding is provided. The position of the movable platen is adjusted and moved by driving the servo motor of the mold opening / closing means so that the movable platen can be coupled to the position. It is possible to provide a mold clamping device capable of easily and reliably adjusting and moving the position of the engaging portion of the.

According to the ninth aspect of the invention, the die thickness of the die is measured from the driving amount of the servo motor of the die opening / closing means, and the stay is applied by the pressing of the die clamping means according to the measured die thickness. Can be moved to both the mold opening side and the mold closing side, and a predetermined position of the stay that can be coupled to the movable plate is calculated, and according to this calculation, the predetermined positions of the movable plate and the stay are calculated. Since the movable platen and the stay are relatively moved by driving the servo motor of the connecting position adjusting means so that they can be connected, and the stay and the movable platen are connected by the connecting device, it is easy to change the die thickness of the holding die. When adjusting the mold thickness to correspond to each other, it is necessary to easily and accurately position the half nut of the coupling means and the predetermined position of the engagement portion of the stay so that they can be engaged with each other. Type that can It is possible to provide a binding position adjustment method of the apparatus.

According to the tenth aspect of the invention, the die thickness of the die is measured from the driving amount of the servo motor of the die opening / closing means, and the die clamping means is positioned at the forward end of the die opening direction.
According to the measured mold thickness, a predetermined position of the stay where the stay can be moved to both the mold opening side and the mold closing side by the pressing of the mold clamping means is calculated, and the movable plate and the stay are calculated according to this calculation. The movable platen is moved with respect to the stay by driving the servo motor of the mold opening / closing means so that the predetermined position of the mold can be connected, and the stay and the movable platen are connected by the connecting means. In the case of (1), when the mold thickness is adjusted to easily respond to the change in the mold thickness of the held mold, the stay position can be known without detecting it, and thus the stay that can be connected to the connecting means. The predetermined position of the connecting means can be uniquely determined, and the predetermined position where the connecting means can be connected to the stay can be easily calculated to determine the predetermined position of the half nut of the connecting means and the engaging portion of the stay. Preparative such that the positional relationship which can be engaged with each other, it is possible to provide a binding position adjustment method of the mold clamping device which can be easily and accurately positioned.

According to the invention of claim 11, both molds are arranged between the fixed platen and the movable platen, and the movable platen is moved close to the fixed platen by the mold opening / closing means to move both molds to the fixed platen. The mold thickness of the mold is measured based on the driving amount of the servo motor of the mold opening / closing means while sandwiching it between the board and the axial position of the stay, and the measured mold thickness and stay axis are detected. Depending on the position in the direction, a predetermined position of the stay that can move the stay to both the mold opening side and the mold closing side by pressing the mold clamping means is calculated, and the position of the movable platen is determined according to the calculation. When it is on the mold closing side from the reference position where it can be connected to the predetermined position, the movable platen is moved to the reference position by the servo motor of the mold opening / closing means so that the movable plate can be connected to the predetermined position of the stay. By connecting the stay and the movable plate by means, When the movable platen is located on the mold opening side from the reference position, the stay is first moved in the mold opening direction so that the movable platen is located on the mold closing side from the reference position, and then the mold opening / closing means is opened. By driving the servo motor to move the movable plate to the mold opening side so that the movable plate can be connected to a predetermined position of the stay, and by connecting the stay and the movable plate by the connecting means, Regardless of how the thickness of the mold for the next mold thickness adjustment with respect to the mold is changed, the movable platen is moved by the servo motor of the mold opening / closing means to move the movable platen by the coupling means to the predetermined position of the stay. It is possible to provide a method for adjusting a connecting position of a mold clamping device that can be connected.

According to the twelfth aspect of the present invention, when the molds are closed while the movable platen and the stay are connected at predetermined positions by the connecting means so as to perform the mold clamping by adjusting the mold thickness, the stay of the stay is closed. The position in the axial direction is stored, and after molding, the stay is pressed and moved by a predetermined amount in the mold opening direction in the mold opening direction to strongly open the mold, and then the joining of the movable plate and the stay by the joining device is released. By driving the servo motor of the coupling position adjusting means, the stay position is changed from the position when the mold is strongly opened to the predetermined position of the stay when both molds are closed to perform the stored mold clamping. The mold is opened by the mold opening / closing means to take out the molded product, the molds are closed, and the stay and the movable board are connected by the connecting means. Sometimes the coupling means (EN) Provided is a method for adjusting a coupling position of a mold clamping device, which enables easy and accurate positioning of a half nut and a predetermined position of an engagement portion of a stay so that they can be engaged with each other. it can.

According to the thirteenth aspect of the present invention, the two molds are closed by the mold opening and closing means, the mold is clamped by the mold clamping means, and the stay is pressed and moved in the mold opening direction in the axial direction by the mold clamping means so that the stay is strong. The mold is opened, the movable plate and the stay are uncoupled by the connecting means, and the movable plate is opened by the mold opening / closing means to take out the molded product without moving the stay in the axial direction.
By driving the servo motor of the mold opening and closing means, the movable platen is moved to a position where the mold is strongly opened and the connection with the stay is released.
In the mold clamping device having a simple structure, the movable platen and the stay are connected by the connecting means, and the stay is moved in the mold closing direction to close the mold. It is possible to provide a coupling position adjusting method for a mold clamping device that can be easily and accurately positioned so that a predetermined position and a predetermined position can be engaged with each other.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a mold clamping device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a front view for explaining the case where the half nut is in a position where it cannot engage with the engaging portion of the stay when the movable platen is moved closer to the fixed platen from the state of FIG. 1;

FIG. 5 is a front view for explaining a state in which the connecting position adjusting means adjusts and moves the position of the stay in the axial direction from the state of FIG. 4 so that the half nut can engage with the engaging portion of the stay. is there.

FIG. 6 is an explanatory view showing an embodiment of the joining position adjusting method of the present invention when performing molding using the mold clamping device shown in FIGS. is there.

FIG. 7 is an explanatory diagram showing the steps following that of FIG. 6 in order.

FIG. 8 is a front view showing another embodiment of the mold clamping device of the present invention.

9 is a plan view of FIG. 8. FIG.

10 is a vertical side view of FIG.

FIG. 11 is a side view of FIG.

FIG. 12 is a flowchart showing an embodiment of a mold thickness adjusting method for a mold clamping device of the present invention.

FIG. 13 is a schematic diagram shown for explaining a state where the half nut is displaced to the − side with respect to the zero point of the stay by measuring the die thickness.

FIG. 14 is a partially enlarged view of FIG.

FIG. 15 is a schematic diagram shown for explaining a state in which the half nut is moved to a position where it can be engaged with the engagement portion of the stay by driving the servo motor from the state of FIG. 13;

16 is a partially enlarged view of FIG.

FIG. 17 is a schematic diagram for explaining a state in which the half nut is engaged with the engagement portion of the stay and the mold clamping means is moved backward in the mold closing direction by driving the servo motor from the state of FIG. 15; is there.

FIG. 18 is a partially enlarged view of FIG.

FIG. 19 is a schematic view shown for explaining a state in which the mold thickness is measured and the half nut is displaced to the + side.

FIG. 20 is a partially enlarged view of FIG.

FIG. 21 is a schematic diagram for explaining a state in which the stay is moved in the mold opening direction from the state of FIG. 19 so that the zero point of the stay is aligned with the half nut or is shifted to the − side.

22 is a partially enlarged view of FIG. 21. FIG.

FIG. 23 is an explanatory view showing an embodiment of the joining position adjusting method of the present invention in the case of performing molding using the mold clamping device shown in FIGS. is there.

FIG. 24 is an explanatory view showing the steps following that of FIG. 23, which are divided in order.

FIG. 25 is a schematic view for explaining another embodiment of the mold thickness adjusting method of the mold clamping device of the present invention, in which the mold clamping means is positioned at the forward limit of the mold opening direction. The state which measures thickness is shown.

FIG. 26 is a schematic diagram for explaining a state in which the half nut is moved to a position where it can be engaged with the engaging portion of the stay by driving the servo motor from the state of FIG. 25.

27 is a schematic view shown for explaining a state in which the half nut is engaged with the engagement portion of the stay and the mold clamping means is moved backward in the mold closing direction by driving the servo motor from the state of FIG. 26; is there.

[Explanation of sign]

1 Fixed board 2 movable plate 3 fixed mold 4 movable mold 5 stay holder 6 stay 7 Coupling means 8 type opening and closing means 9 Mold clamping means 10 Coupling position adjusting means 25 groove (engagement part of stay) 26 Ridge (half nut engagement part) 27 Half Nut

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4F202 AP06 AP11 AR07 AR09 CA11                       CB01 CL01 CL16 CL22 CL25                       CL39 CL42 CL43 CL44 CL48                 4F206 AP06 AP11 AR07 AR09 JA07                       JQ83 JT05 JT33 JT38

Claims (13)

[Claims] 1. A fixed platen to which one mold is attached, a stay holder arranged to face the fixed platen, a stay whose ends are respectively supported by the fixed platen and the stay holder, and a fixed platen. A movable plate to which the stay is inserted so that it can move closer and farther, and the other mold is attached, a connecting means that releasably connects the movable plate to a predetermined position with respect to the stay, and a servo motor drive With the mold opening / closing means for moving the movable plate relative to the fixed plate in a relatively quick and controllable manner, and with the connecting means connecting the movable plate to the stay, the stay to which the movable plate is connected with a relatively large force is axially moved. The movable platen so that the stay can be moved to both the mold opening side and the mold closing side by the pressing of the mold clamping means and the movable platen. And stay relative Mold clamping device comprising position and coupling position adjusting means for adjusting moving, further comprising a. 2. The mold clamping means is provided on a stationary platen, one end of the stay is connected to the mold clamping means, the other end of the stay is fixed to the stay holder, and the connecting position adjusting means is the stay holder. 2. The mold clamping device according to claim 1, wherein the position of the stay with respect to the movable plate is configured to be axially adjusted and moved by moving the. 3. A mold screw opening / closing means is arranged in parallel with the stay and is driven to rotate around a shaft by a servomotor, and a ball screw nut provided on the movable plate and screwed to the ball screw shaft. The mold clamping device according to claim 1 or 2, further comprising: 4. The mold clamping means is provided on a stationary platen, one end of the stay is connected to the mold clamping means, the other end of the stay is fixed to the stay holder, and the mold opening / closing means is connected to the stay. Ball screw shafts that are arranged in parallel and are driven to rotate around their axes by the drive of a servo motor,
A ball screw nut provided on the movable plate and screwed to the ball screw shaft is provided, and the coupling position adjusting means detects the relative position of the movable plate and the stay, and based on the detection by the detecting means. And a control means for controlling the drive of the servo motor of the mold opening / closing means so that the movable platen can be coupled to a predetermined position where the stay can be moved to both the mold opening side and the mold closing side. The mold clamping device according to claim 1, wherein: 5. The mold clamping device according to claim 3, wherein the stay holder is provided with a ball screw shaft supporting means for supporting an end portion of the ball screw shaft. 6. The movable plate and the stay are arranged so that the connecting position adjusting unit can connect the movable plate to a predetermined position of the stay by the connecting unit according to the mold thickness of a mold attached to the fixed plate and the movable plate. The mold clamping device according to any one of claims 1 to 5, wherein the relative position is adjusted and moved. 7. The connecting position adjusting means adjusts and moves the position of the stay in the axial direction so that a predetermined position of the stay can be connected to the movable plate at the mold closing position during molding. The mold clamping device according to any one of claims 1 to 3, which is characterized. 8. The servo of the mold opening / closing means so that the connecting position adjusting means can connect the movable plate to a predetermined position of the stay in a strong mold opening state separated from the mold closing position during molding. The mold clamping device according to claim 1 or 4, wherein the position of the movable platen is adjusted and moved by driving a motor. 9. A fixed platen to which one mold is attached, a movable plate to which a stay is inserted so as to be movable toward and away from the fixed plate, and the other mold is attached, and a movable plate to the stay. A coupling means for releasably coupling to a predetermined position, a mold opening / closing means for relatively quickly and controllably moving the movable platen relative to the fixed platen by driving a servo motor, and a movable platen with a relatively large force. So that the movable platen can be connected to a predetermined position of the stay movable to both the mold opening side and the mold closing side by pressing the mold clamping means for axially pressing the stay to which it is connected. A coupling position adjusting means for adjusting and moving the relative position between the movable platen and the stay by driving the servo motor, and a mold opening side by pressing the mold clamping means according to the mold thickness according to the mold thickness. Stay that can be moved to both mold closing side A method of adjusting a connecting position between a movable platen and a stay by a connecting means so that a predetermined position and the movable platen can be connected to each other, in which both molds are arranged between a fixed platen and a movable platen. The movable platen is moved closer to the fixed platen by the opening / closing means to sandwich both molds between the fixed platen and the movable platen, and the mold thickness of the mold is measured based on the driving amount of the servo motor of the mold opening / closing means. According to the measured mold thickness, the stay can be moved to both the mold opening side and the mold closing side by the pressing of the mold clamping means, and the stay can be connected to the movable plate at a predetermined position. Is calculated, and the movable platen and the stay are moved relative to each other by driving the servomotor of the connecting position adjusting means so that the predetermined positions of the movable platen and the stay can be combined with each other. Of the mold clamping device characterized by connecting If position adjustment method. 10. A fixed platen to which one mold is attached, a movable plate to which a stay is inserted so as to be movable toward and away from the fixed plate, and the other mold is attached, and a movable plate to the stay. A coupling means for releasably coupling to a predetermined position, a mold opening / closing means for relatively quickly and controllably moving the movable platen relative to the fixed platen by driving a servo motor, and a movable platen with a relatively large force. A mold clamping device that comprises a mold clamping device that axially presses the stay connected to the mold, and can move to both the mold opening side and the mold closing side by pressing the mold clamping device according to the mold thickness. A method of adjusting the connecting position of the movable platen and the stay by the connecting means so that the predetermined position of the stay and the movable platen can be connected. Both molds are arranged between the fixed platen and the movable platen. Then, move the movable platen closer to the fixed platen by the mold opening and closing means. Both molds are sandwiched between a fixed platen and a movable platen, the mold thickness of the mold is measured based on the drive amount of the servo motor of the mold opening / closing means, and the mold clamping means is positioned at the forward limit of the mold opening direction. Moving the stay to both the mold opening side and the mold closing side by pressing the mold clamping means in accordance with the measured mold thickness in a state where the mold clamping means is positioned at the forward limit of the mold opening direction. A predetermined position of the stay is calculated, and the movable platen is moved with respect to the stay by driving the servo motor of the mold opening / closing means so that the predetermined position of the movable plate and the stay can be combined according to the calculation. A connecting position adjusting method for a mold clamping device, characterized in that the stay and the movable plate are connected by means. 11. A fixed plate to which one die is attached, a movable plate to which a stay is inserted so as to be able to move toward and away from the fixed plate, and the other die is attached, and a movable plate to the stay. A coupling means for releasably coupling to a predetermined position, a mold opening / closing means for relatively quickly and controllably moving the movable platen relative to the fixed platen by driving a servo motor, and a movable platen with a relatively large force. A mold clamping device that comprises a mold clamping device that axially presses the stay connected to the mold, and can move to both the mold opening side and the mold closing side by pressing the mold clamping device according to the mold thickness. A method of adjusting the connecting position of the movable platen and the stay by the connecting means so that the predetermined position of the stay and the movable platen can be connected. Both molds are arranged between the fixed platen and the movable platen. Then, move the movable platen closer to the fixed platen by the mold opening and closing means. The mold is sandwiched between a fixed platen and a movable platen, the mold thickness of the mold is measured based on the drive amount of the servo motor of the mold opening / closing means, and the axial position of the stay is detected. Depending on the mold thickness and the axial position of the stay,
A predetermined position of the stay at which the stay can be moved to both the mold opening side and the mold closing side by the pressing of the mold clamping means is calculated, and the position of the movable plate is combined with the predetermined position of the stay according to the calculation. When it is on the mold closing side from the obtained reference position, the movable platen is moved to the reference position by the servo motor of the mold opening / closing means so that the movable platen can be connected to a predetermined position of the stay, and then the stay and the movable platen are connected by the connecting means. When the position of the movable plate is on the mold opening side from the reference position, the stay is moved in the mold opening direction first so that the position of the movable plate is on the mold closing side from the reference position. The movable platen is moved to the mold opening side by driving the servo motor of the mold opening / closing means so that the movable platen can be connected to a predetermined position of the stay, and then the stay and the movable platen are connected by the connecting means. Adjusting method of connecting position of mold clamping device. 12. A fixed plate to which one mold is attached, a movable plate to which a stay is inserted so as to be movable toward and away from the fixed plate, and the other mold is attached, a movable plate and a stay. The connecting means for releasably connecting the predetermined position to the fixed plate, the mold opening / closing means for moving the movable plate relative to the fixed plate in a relatively quick and controllable manner by driving the servo motor, and the movable plate with relatively large force. A mold clamping means for axially pressing the combined stay, and a movable platen and a predetermined position of the stay movable on both the mold opening side and the mold closing side by the pressing of the mold clamping means. , A coupling position adjusting means for adjusting and moving the relative position between the movable platen and the stay, and a mold clamping device comprising: So that it can be combined with a given position, A method of adjusting the connecting position between the movable platen and the stay by the connecting means, in which both molds are connected in a state where the movable platen and the stay are connected at a predetermined position by the connecting device so that the mold thickness is adjusted to perform the mold clamping. The axial position of the stay when the mold is closed is stored, and after molding, the stay is pressed by the mold clamping means in the axial direction by a predetermined amount in the axial direction to strongly open the mold, and then the movable plate is moved by the connecting means. And the stay are disengaged, and the stay position is closed by driving the servo motor of the connecting position adjusting means from the position when the mold is strongly opened to perform the stored mold clamping. Sometimes, the predetermined position of the stay and the movable platen are returned to a position where they can be connected to each other, and the mold is opened by the mold opening / closing means to take out the molded product, and both molds are closed, and the stay and the movable platen are connected by the connecting means. To combine Binding position adjustment method of the mold clamping apparatus according to claim. 13. A fixed plate to which one mold is attached, a movable plate to which a stay is inserted so as to be movable toward and away from the fixed plate, and the other mold is attached, and a movable plate to the stay. A coupling means for releasably coupling to a predetermined position, a mold opening / closing means for relatively quickly and controllably moving the movable platen relative to the fixed platen by driving the servomotor, and a movable platen with a relatively large force. A mold clamping device for axially pressing the stay to which the stay is coupled, and the stay is connected to the mold opening side by pressing the mold clamping device according to the axial position of the stay during molding. A method for adjusting the connecting position of the movable plate and the stay by the connecting means so that the predetermined position of the stay that can be moved to both the mold closing side and the movable plate can be connected. Both molds are closed by The mold is clamped by, and the stay is pushed axially in the mold opening direction by the mold clamping means to strongly open the mold, and the stay is not moved in the axial direction by releasing the connection between the movable plate and the stay by the connecting means. , The movable platen is opened by the mold opening / closing means and the molded product is taken out, and the movable platen is strongly opened by the servo motor of the mold opening / closing means to move to the position where the connection with the stay is released. A method for adjusting a connecting position of a mold clamping device, characterized by connecting a movable plate and a stay, and moving the stay in a mold closing direction to close the mold.