JP6786336B2 - Injection molding machine - Google Patents

Description

The present invention relates to an injection molding machine.

The injection molding machine described in Patent Document 1 includes a toggle link type mold clamping device. The toggle link type clamping device includes a fixing plate fixed on the machine base and a drive plate (pressure receiving plate) supported on the machine base so as to be able to move forward and backward. Four tie bars are erected between the fixed plate and the drive plate. The front end of each tie bar is fixed to the fixing plate, and the rear end of each tie bar is screwed with an adjusting nut attached to the drive plate. Each adjusting nut constitutes a mold thickness adjusting mechanism that adjusts the position of the drive panel. The mold thickness adjusting mechanism performs correction processing when the mold clamping force fluctuates due to disturbance factors such as the heating temperature of the mold and the outside air temperature.

Japanese Patent No. 5149584

Due to the mold thickness adjustment, the positions of the components of the mold clamping device may shift, which may hinder the delivery of articles between the mold device and the external device.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an injection molding machine capable of smoothly delivering an article between a mold device and an external device.

In order to solve the above problems, according to one aspect of the present invention,
With the first platen
The second platen that forms the cavity space of the mold device in cooperation with the first platen,
A third platen arranged at a distance from the first platen,
A mold thickness adjusting mechanism for adjusting the distance between the first platen and the third platen,
It has a control device for controlling the mold thickness adjusting mechanism and
One of the first platen and the second platen is a movable platen that moves by opening and closing the mold, and the other is a fixed platen.
The control device is provided with an injection molding machine that changes the interval by the mold thickness adjusting mechanism and changes the mold opening distance of the movable platen based on the change amount of the interval.

According to one aspect of the present invention, there is provided an injection molding machine capable of smoothly delivering an article between a mold device and an external device.

It is a figure which shows the state at the time of completion of the mold opening of the injection molding machine by one Embodiment. It is a figure which shows the state at the time of mold clamping of the injection molding machine by one Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings, but in each drawing, the same or corresponding configurations will be referred to with the same or corresponding reference numerals and description thereof will be omitted.

FIG. 1 is a diagram showing a state at the time of completion of mold opening of the injection molding machine according to one embodiment. FIG. 2 is a diagram showing a state at the time of mold clamping of the injection molding machine according to one embodiment. As shown in FIGS. 1 and 2, the injection molding machine includes a frame Fr, a mold clamping device 10, an injection device 40, an ejector device 50, and a control device 90. In the following description, the moving direction of the movable platen 13 when the mold is closed (right direction in FIGS. 1 and 2) is set to the front, and the moving direction of the movable platen 13 when the mold is opened (left direction in FIGS. 1 and 2). Described as backward.

The mold clamping device 10 closes, clamps, and opens the mold of the mold apparatus 30. The mold clamping device 10 is, for example, a horizontal type, and the mold opening / closing direction is the horizontal direction. The mold clamping device 10 includes a fixed platen 12, a movable platen 13, a toggle support 15, a tie bar 16, a toggle mechanism 20, a mold clamping motor 25, and a motion conversion mechanism 26.

The fixed platen 12 is fixed to the frame Fr. The fixed mold 32 is attached to the surface of the fixed platen 12 facing the movable platen 13.

The movable platen 13 is movable in the mold opening / closing direction with respect to the frame Fr. A guide 17 for guiding the movable platen 13 is laid on the frame Fr. The movable mold 33 is attached to the surface of the movable platen 13 facing the fixed platen 12.

By advancing and retreating the movable platen 13 with respect to the fixed platen 12, mold closing, mold clamping, and mold opening are performed. The mold device 30 is composed of the fixed mold 32 and the movable mold 33. The fixed platen 12 and the movable platen 13 cooperate to form the cavity space 34 of the mold device 30.

The toggle support 15 is connected to the fixed platen 12 at a distance L, and is movably placed on the frame Fr in the mold opening / closing direction. The toggle support 15 may be movable along a guide laid on the frame Fr. The guide of the toggle support 15 may be the same as that of the guide 17 of the movable platen 13.

In the present embodiment, the fixed platen 12 is fixed to the frame Fr and the toggle support 15 is movable in the mold opening / closing direction with respect to the frame Fr, but the toggle support 15 is fixed to the frame Fr and the fixed platen. 12 may be movable in the mold opening / closing direction with respect to the frame Fr.

The tie bar 16 connects the fixed platen 12 and the toggle support 15 at intervals L. A plurality of tie bars 16 may be used. Each tie bar 16 is parallel to the mold opening / closing direction and extends according to the mold clamping force. At least one tie bar 16 is provided with a mold clamping force detector 18. The mold clamping force detector 18 detects the mold clamping force by detecting the distortion of the tie bar 16, and sends a signal indicating the detection result to the control device 90.

The mold clamping force detector 18 is not limited to the strain gauge type, but may be a piezoelectric type, a capacitance type, a hydraulic type, an electromagnetic type, or the like, and the mounting position thereof is not limited to the tie bar 16.

The toggle mechanism 20 is arranged between the movable platen 13 and the toggle support 15, and moves the movable platen 13 with respect to the toggle support 15 in the mold opening / closing direction. The toggle mechanism 20 is composed of a crosshead 21, a pair of links, and the like. Each link group has a first link 22 and a second link 23 that are flexibly connected by a pin or the like. The first link 22 is swingably attached to the movable platen 13 with a pin or the like, and the second link 23 is swingably attached to the toggle support 15 with a pin or the like. The second link 23 is attached to the crosshead 21 via the third link 24. When the crosshead 21 is moved back and forth with respect to the toggle support 15, the first link 22 and the second link 23 are bent and stretched, and the movable platen 13 is moved back and forth with respect to the toggle support 15.

The configuration of the toggle mechanism 20 is not limited to the configuration shown in FIGS. 1 and 2. For example, in FIGS. 1 and 2, the number of nodes in each link group is 5, but it may be 4, and one end of the third link 24 is connected to the nodes of the first link 22 and the second link 23. May be done.

The mold clamping motor 25 is attached to the toggle support 15 and operates the toggle mechanism 20. The mold clamping motor 25 bends and stretches the first link 22 and the second link 23 by advancing and retracting the crosshead 21 with respect to the toggle support 15, and advances and retracts the movable platen 13 with respect to the toggle support 15. The mold clamping motor 25 is directly connected to the motion conversion mechanism 26, but may be connected to the motion conversion mechanism 26 via a belt, a pulley, or the like.

The motion conversion mechanism 26 converts the rotational motion of the mold clamping motor 25 into a linear motion of the crosshead 21. The motion conversion mechanism 26 includes a screw shaft and a screw nut screwed onto the screw shaft. A ball or roller may be interposed between the screw shaft and the screw nut.

As shown in FIGS. 1 and 2, the control device 90 includes a CPU (Central Processing Unit) 91, a storage medium 92 such as a memory, an input interface 93, and an output interface 94. The control device 90 performs various controls by causing the CPU 91 to execute the program stored in the storage medium 92. Further, the control device 90 receives a signal from the outside at the input interface 93 and transmits the signal to the outside at the output interface 94.

The mold clamping device 10 performs a mold closing step, a mold clamping step, a mold opening step, and the like under the control of the control device 90.

In the mold closing step, the movable platen 13 is advanced by driving the mold clamping motor 25 to advance the crosshead 21 to the mold closing completion position at a set speed, and the movable mold 33 is touched by the fixed mold 32. The position and speed of the crosshead 21 are detected by using, for example, the encoder 25a of the mold clamping motor 25. The encoder 25a detects the rotation of the mold clamping motor 25 and sends a signal indicating the detection result to the control device 90.

In the mold clamping step, the mold clamping force 25 is further driven to further advance the crosshead 21 from the mold closing completion position to the mold clamping position to generate a mold clamping force. At the time of mold clamping, a cavity space 34 is formed between the movable mold 33 and the fixed mold 32, and the injection device 40 fills the cavity space 34 with a liquid molding material. A molded product is obtained by solidifying the filled molding material. The number of cavity spaces 34 may be plural, in which case a plurality of molded articles can be obtained at the same time.

In the mold opening step, the mold clamping motor 25 is driven to retract the crosshead 21 to the mold opening completion position at a set speed, thereby retracting the movable platen 13 and separating the movable mold 33 from the fixed mold 32. After that, the ejector device 50 projects the molded product from the movable mold 33.

In the present embodiment, the position and speed of the crosshead 21 are controlled in the mold closing step, the mold clamping step, and the mold opening step, but the position and speed of the movable platen 13 may be controlled. If the position and speed of one of the crosshead 21 and the movable platen 13 are controlled, the position and speed of the other are controlled.

By the way, the toggle mechanism 20 amplifies the propulsive force of the mold clamping motor 25 and transmits it to the movable platen 13. The amplification factor is also called the toggle magnification. The toggle magnification changes according to the angle θ (hereinafter, also referred to as “link angle θ”) formed by the first link 22 and the second link 23. When the link angle θ is 180 °, the toggle magnification is maximized.

When the thickness of the mold device 30 changes due to replacement of the mold device 30 or a temperature change of the mold device 30, the mold thickness is adjusted so that a predetermined mold clamping force can be obtained at the time of mold clamping. In the mold thickness adjustment, for example, the distance L between the fixed platen 12 and the toggle support 15 is set so that the link angle θ of the toggle mechanism 20 becomes a predetermined angle at the time of the mold touch when the movable mold 33 touches the fixed mold 32. To adjust.

The mold clamping device 10 has a mold thickness adjusting mechanism 60 that adjusts the mold thickness by adjusting the distance L between the fixed platen 12 and the toggle support 15. The mold thickness adjusting mechanism 60 includes, for example, a screw shaft 61 formed at the rear end of the tie bar 16, a screw nut 62 rotatably held by the toggle support 15, and a screw nut 62 screwed to the screw shaft 61. It has a mold thickness adjusting motor 63 to rotate.

The screw shaft 61 and the screw nut 62 are provided for each tie bar 16. The rotation of the mold thickness adjusting motor 63 may be transmitted to a plurality of screw nuts 62 via a rotation transmission unit 64 composed of a belt, a pulley, or the like. A plurality of screw nuts 62 can be rotated in synchronization. By changing the transmission path of the rotation transmission unit 64, it is possible to rotate the plurality of screw nuts 62 individually.

The rotation transmission unit 64 may be composed of gears or the like instead of the belt or pulley. In this case, a passive gear is formed on the outer circumference of each screw nut 62, a drive gear is attached to the output shaft of the mold thickness adjusting motor 63, and a plurality of passive gears and an intermediate gear that meshes with the drive gear are located at the center of the toggle support 15. It is held rotatably.

The mold thickness adjusting mechanism 60 performs the mold thickness adjusting step under the control of the control device 90. In the mold thickness adjusting step, the mold thickness adjusting motor 63 is driven to rotate the screw nut 62, thereby adjusting the distance L between the toggle support 15 that holds the screw nut 62 rotatably and the fixed platen 12.

In the present embodiment, the screw nut 62 is rotatably held with respect to the toggle support 15, and the tie bar 16 on which the screw shaft 61 is formed is fixed to the fixed platen 12, but the present invention is not limited thereto.

For example, the screw nut 62 may be rotatably held relative to the fixed platen 12 and the tie bar 16 may be fixed to the toggle support 15. In this case, the interval L can be adjusted by rotating the screw nut 62.

Further, the screw nut 62 may be fixed to the toggle support 15, and the tie bar 16 may be rotatably held to the fixed platen 12. In this case, the interval L can be adjusted by rotating the tie bar 16.

Furthermore, the screw nut 62 may be fixed to the fixed platen 12 and the tie bar 16 may be rotatably held relative to the toggle support 15. In this case, the interval L can be adjusted by rotating the tie bar 16.

The mold thickness adjusting mechanism 60 adjusts the interval L by rotating one of the screw shaft 61 and the screw nut 62 that are screwed together. A plurality of mold thickness adjusting mechanisms 60 may be used, and a plurality of mold thickness adjusting motors 63 may be used.

In the mold thickness adjusting step, for example, the mold thickness adjusting motor 63 is driven with the link angle θ of the toggle mechanism 20 set to a predetermined angle and the mold clamping motor 25 is stopped, and the movable mold 33 is fixed during the driving. The type touch that touches 32 is detected. The distance L between the fixed platen 12 and the toggle support 15 at the time when the type touch is detected is set as the target distance.

In the mold thickness adjusting step, in order to detect the mold touch, the mold device 30 may be closed by narrowing the interval L. When the movable mold 33 touches the fixed mold 32, the mold clamping force starts to increase, and the torque of the mold thickness adjusting motor 63 starts to increase. Therefore, the mold touch can be detected based on the change in the mold clamping force and / or the change in the torque of the mold thickness adjusting motor 63.

In the mold thickness adjusting step, in order to detect the mold touch, the mold device 30 may be depressurized by widening the interval L. The depressurization of the mold device 30 is performed from the mold clamping state. In this case as well, the mold touch can be detected based on the change in the mold clamping force and / or the change in the torque of the mold thickness adjusting motor 63.

By the way, the control device 90 drives the mold clamping motor 25 so that the position of the crosshead 21 with respect to the toggle support 15 becomes a set position in the mold closing process, the mold clamping process, and the mold opening process. Examples of the set position include a mold closing completion position, a mold clamping position, and a mold opening completion position.

The mold opening completion position also serves as a position where the movable mold 33 delivers the article to the external device 110 and a position where the movable mold 33 receives the article from the external device 110. Examples of the external device 110 include a take-out machine that receives a molded product from the movable mold 33, an insert machine that delivers insert parts to the movable mold 33, and the like. The movable mold 33 delivers the molded product to the external device 110, and receives the insert component from the external device 110. The insert component is integrated with the molding material filled in the cavity space 34 and becomes a part of the molded product. The take-out machine and the insert machine may be provided separately, but the take-out machine can also serve as the insert machine. The external device 110 has a grip portion for gripping an article such as a robot hand.

In the present embodiment, the delivery of the article is performed after the completion of the mold opening process and before the start of the mold closing process, but the present invention is not limited to this, and may be performed, for example, during the mold opening process. In this case, the crosshead 21 may be temporarily stopped in the middle of the mold opening process. Hereinafter, the position where the movable mold 33 delivers the article to the external device 110 and the position where the movable mold 33 receives the article from the external device 110 are referred to as a mold opening position. The mold opening position may be a mold opening completion position or a position in front of the mold opening completion position. The position where the movable mold 33 delivers the article to the external device 110 and the position where the movable mold 33 receives the article from the external device 110 may be the same position or different positions.

When the distance L between the fixed platen 12 and the toggle support 15 is changed by the mold thickness adjusting mechanism 60, the position of the toggle support 15 with respect to the frame Fr is changed. Therefore, if the mold opening position of the crosshead 21 with respect to the toggle support 15 is not changed, the mold opening position of the crosshead 21 with respect to the frame Fr shifts. As a result, the mold opening position of the movable platen 13 with respect to the frame Fr may shift, and the relative position of the movable mold 33 and the external device 110 at the time of delivery of the article may shift. This is because the external device 110 does not change its position with respect to the frame Fr by adjusting the mold thickness. The external device 110 is installed, for example, on the floor where the frame Fr is installed, the fixed platen 12, or the like.

Therefore, the control device 90 changes the distance L by the mold thickness adjusting mechanism 60, and changes the mold opening position of the crosshead 21 with respect to the toggle support 15 based on the change amount of the distance L, so that the cross in the mold opening process The moving distance of the head 21 in the mold opening direction is changed, and the mold opening distance of the movable platen 13 is changed.

Here, the moving distance of the crosshead 21 in the mold opening direction in the mold opening process is the distance at which the crosshead 21 retracts from the mold clamping position to the mold opening position. The moving distance in the mold opening direction may be a distance at which the crosshead 21 retracts from the mold closing completion position to the mold opening position. The reference position may be the mold clamping position or the mold closing completion position, and is not particularly limited. The amount of change in the moving distance in the mold opening direction is the same regardless of the reference position.

The control device 90 detects the amount of change in the interval L by using, for example, the encoder 63a of the mold thickness adjusting motor 63. The encoder 63a detects the amount of rotation and the direction of rotation of the mold thickness adjusting motor 63, and sends a signal indicating the detection result to the control device 90. The control device 90 detects the amount of change in the interval L based on the information received from the encoder 63a.

When the interval L becomes long, the toggle support 15 retracts with respect to the frame Fr. In this case, the control device 90 advances the mold opening position of the crosshead 21 with respect to the toggle support 15 to shorten the moving distance of the crosshead 21 in the mold opening direction and the mold opening distance of the movable platen 13 in the mold opening process.

On the other hand, when the interval L becomes shorter, the toggle support 15 advances with respect to the frame Fr. In this case, the control device 90 retracts the mold opening position of the crosshead 21 with respect to the toggle support 15 to increase the moving distance of the crosshead 21 in the mold opening direction and the mold opening distance of the movable platen 13 in the mold opening process.

The magnitude of the change amount of the mold opening distance may be the same as the magnitude of the change amount of the interval L. Before and after the mold thickness adjustment, the mold opening position of the movable mold 33 with respect to the frame Fr can be maintained, and the relative position between the movable mold 33 and the external device 110 at the time of delivery of the article can be maintained. Therefore, the article can be smoothly delivered from either one of the movable mold 33 and the external device 110 to the other.

The amount of change in the mold opening distance may be appropriately set within a range in which the article can be smoothly delivered from either one of the movable mold 33 and the external device 110 to the other, and the interval L may be set. It does not have to be the same as the amount of change in.

When the mold opening position of the crosshead 21 with respect to the toggle support 15 is changed, the control device 90 maintains the mold clamping position and the mold closing completion position of the crosshead 21 with respect to the toggle support 15 without changing. This is to obtain a predetermined mold clamping force at the time of mold clamping.

The control device 90 is a position where the external device 110 delivers the article to the movable mold 33 or a position where the external device 110 receives the article from the movable mold 33 instead of changing the mold opening position of the crosshead 21 with respect to the toggle support 15. (Hereinafter, it may be simply referred to as "working position of the external device 110"). The position where the external device 110 delivers the article to the movable mold 33 and the position where the external device 110 receives the article from the movable mold 33 may be the same position or different positions.

The control device 90 transmits the change amount of the interval L to the external device 110 in order to change the working position of the external device 110. The external device 110 and the control device 90 are connected to each other via a communication line 120 such as an Internet line or a LAN (Local Area Network). The external device 110 and the control device 90 may be connected by wire or wirelessly. The external device 110 changes the working position of a grip portion such as a robot hand based on the information received from the control device 90.

When the interval L becomes long, the toggle support 15 retracts with respect to the frame Fr. In this case, since the mold opening position of the movable platen 13 with respect to the frame Fr is retracted, the control device 90 retracts the working position of the external device 110 with respect to the frame Fr.

On the other hand, when the interval L becomes shorter, the toggle support 15 advances with respect to the frame Fr. In this case, since the mold opening position of the movable platen 13 with respect to the frame Fr advances, the control device 90 advances the working position of the external device 110 with respect to the frame Fr.

The magnitude of the change amount of the working position of the external device 110 may be the same as the magnitude of the change amount of the interval L. Before and after the mold thickness adjustment, the relative position between the movable mold 33 and the external device 110 at the time of delivery of the article can be maintained. Therefore, the article can be smoothly delivered from either one of the movable mold 33 and the external device 110 to the other.

The amount of change in the working position of the external device 110 may be appropriately set within a range in which the article can be smoothly delivered from either one of the movable mold 33 and the external device 110 to the other. , It does not have to be the same as the magnitude of the change amount of the interval L.

In the present embodiment, the fixed platen 12 is the first platen described in the claims, the movable platen 13 is the second platen described in the claims, and the toggle support 15 is the third platen described in the claims. Corresponds to each platen.

In the present embodiment, the fixed platen 12 is fixed to the frame Fr, and the toggle support 15 is movable in the mold opening / closing direction with respect to the frame Fr, but the present invention is not limited to this. That is, the fixed platen 12 may be movable with respect to the frame Fr in the mold opening / closing direction, and the toggle support 15 may be fixed to the frame Fr.

In this case, when the distance L between the fixed platen 12 and the toggle support 15 is adjusted by the mold thickness adjusting mechanism 60, the position of the fixed platen 12 with respect to the frame Fr is changed. Therefore, the control device 90 may change the interval L by the mold thickness adjusting mechanism 60 and change the working position of the external device 110 based on the change amount of the interval L. Articles can be smoothly delivered from either one of the fixed mold 32 and the external device 110 to the other.

Although the embodiments of the injection molding machine have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications are made within the scope of the gist of the present invention described in the claims. It can be improved.

The mold clamping device 10 of the above embodiment is a horizontal type in which the mold opening / closing direction is horizontal, but may be a vertical type in which the mold opening / closing direction is vertical.

The vertical mold clamping device includes a lower platen, an upper platen, a toggle support, a tie bar, a toggle mechanism, a mold clamping motor, a mold thickness adjusting mechanism, and the like. One of the lower platen and the upper platen is used as a fixed platen, and the other one is used as a movable platen. A lower mold is attached to the lower platen, and an upper mold is attached to the upper platen. A mold device is composed of a lower mold and an upper mold. The lower mold may be attached to the lower platen via a rotary table. The toggle support is located below the lower platen. The toggle mechanism is disposed between the toggle support and the lower platen. If the lower platen is a fixed platen, the toggle mechanism raises and lowers the toggle support with respect to the lower platen. On the other hand, when the lower platen is a movable platen, the toggle mechanism raises and lowers the lower platen with respect to the toggle support. The mold clamping motor operates the toggle mechanism. The tie bar is parallel in the vertical direction, penetrates the lower platen, and connects the upper platen and the toggle support.

The vertical mold thickness adjusting mechanism adjusts the mold thickness by adjusting the distance between the upper platen and the toggle support according to a change in the thickness of the mold device. In this mold thickness adjustment, the distance between the upper platen and the toggle support is adjusted so that the link angle of the toggle mechanism becomes a predetermined angle at the time of the mold touch where the lower mold and the upper mold touch. The link angle can be adjusted to a predetermined angle when the mold closing is completed, and a predetermined mold clamping force can be obtained at the time of mold clamping. The mold thickness adjusting mechanism includes a screw shaft formed on the tie bar, a screw nut held by one of the upper platen and the toggle support, and a mold thickness adjusting motor that rotates one of the screw shaft and the screw nut that are screwed together. Have. The mold thickness adjusting mechanism may further have a screw nut held on the other side of the upper platen and the toggle support.

In the case of the vertical type, the upper platen is in the first platen described in the claims, the lower platen is in the second platen described in the claims, and the toggle support is in the third platen described in the claims. Corresponds to each.

The mold clamping device 10 of the above embodiment has a toggle mechanism 20 and a mold clamping motor 25 for operating the toggle mechanism 20, but may have a linear motor for opening and closing the mold and an electromagnet for mold clamping.

The electromagnet type mold clamping device includes, for example, a fixed platen, a movable platen, a rear platen, a tie bar, a suction plate, a rod, and a mold thickness adjusting mechanism. The rear platen is arranged on the side opposite to the fixed platen (that is, behind the movable platen) with respect to the movable platen. The tie bar connects the fixed platen and the rear platen at intervals in the mold opening / closing direction. The suction plate can move forward and backward together with the movable platen behind the rear platen. The rod is inserted through the through hole of the rear platen to connect the movable platen and the suction plate. An electromagnet is formed on at least one of the rear platen and the suction plate, and the suction force of the electromagnet acts between the rear platen and the suction plate to generate a mold clamping force.

In the case of the electromagnet type, the mold thickness adjusting mechanism adjusts the mold thickness by adjusting the distance between the movable platen and the suction plate. In this mold thickness adjustment, the distance between the movable platen and the suction plate is adjusted so that a predetermined gap is formed between the suction plate and the rear platen at the time of the mold touch where the movable mold and the fixed mold touch. To do. A predetermined gap can be formed between the suction plate and the rear platen when the mold closing is completed, and a predetermined mold clamping force can be obtained at the time of mold clamping. The mold thickness adjusting mechanism includes a screw shaft formed on the rod, a screw nut held by one of the movable platen and the suction plate, and a mold thickness adjusting motor that rotates one of the screw shaft and the screw nut that are screwed together. Have. The mold thickness adjusting mechanism may further have a screw nut held on the other side of the movable platen and the suction plate.

In the case of the electromagnet type, the fixed platen is in the second platen described in the claims, the movable platen is in the first platen described in the claims, and the suction plate is in the third platen described in the claims. Corresponds to each.

The linear motor includes, for example, a stator fixed to the frame and a mover that moves with respect to the frame. The mover is fixed to a suction plate or a movable platen. When a predetermined current is supplied to the coil of the mover, the mover is moved forward and backward by the interaction between the magnetic field formed by the current flowing through the coil and the magnetic field formed by the permanent magnet of the stator. And movable platen can be advanced and retreated. The control device controls the linear motor so that the position and speed of the mover with respect to the frame become a preset position and speed. The arrangement of the coil and the permanent magnet may be reversed, and another coil may be used instead of the permanent magnet.

The control device changes the distance between the movable platen and the suction plate with the mold thickness adjustment mechanism, and changes the mold opening position of the mover with respect to the frame based on the amount of change in the distance, thereby changing the mold opening distance of the movable platen. May be changed. As a result, the article can be smoothly delivered from either one of the movable mold and the external device to the other.

Further, in the control device, the distance between the movable platen and the suction plate is changed by the mold thickness adjusting mechanism, and the position where the external device delivers the article to the mold device and the external device is the mold based on the change amount of the distance. You may change the position to receive the article from the device. As a result, the article can be smoothly delivered from either one of the mold device and the external device to the other.

In the take-out machine of the above embodiment, the molded product filled in the cavity space of the mold device is taken out from the mold device, but the passage (so-called spool, runner, etc.) from the inlet of the mold device to the cavity space is filled. The molded material may be taken out from the mold apparatus.

10 Mold clamping device 12 Fixed platen 13 Movable platen 15 Toggle support 16 Tie bar 18 Mold clamping force detector 20 Toggle mechanism 21 Cross head 25 Mold clamping motor 26 Motion conversion mechanism 30 Mold device 40 Injection device 50 Ejector device 60 Type thickness adjustment mechanism 61 Screw shaft 62 Screw nut 63 type Thickness adjustment motor 64 Rotation transmission unit 90 Control device 110 External device

Claims (2)

With the first platen
The second platen that forms the cavity space of the mold device in cooperation with the first platen,
A third platen arranged at a distance from the first platen,
A mold thickness adjusting mechanism for adjusting the distance between the first platen and the third platen,
It has a control device for controlling the mold thickness adjusting mechanism and
One of the first platen and the second platen is a movable platen that moves by opening and closing the mold, and the other is a fixed platen.
The control device is an injection molding machine that changes the interval by the mold thickness adjusting mechanism and changes the mold opening distance of the movable platen based on the change amount of the interval. Further provided with a toggle mechanism for moving the second platen relative to the third platen.
The toggle mechanism has a crosshead that can be moved back and forth in the mold opening / closing direction with respect to the third platen.
The control device is movable by changing the interval with the mold thickness adjusting mechanism and changing the moving distance of the crosshead in the mold opening direction in the mold opening step based on the change amount of the interval. The injection molding machine according to claim 1, wherein the mold opening distance of the platen is changed.

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