TWI574816B - Injection molding machine - Google Patents

Description

Injection molding machine

The present invention relates to an injection molding machine including an electromagnet that drives a mold clamping operation.

Conventionally, in an injection molding machine, a resin is injected from an injection nozzle of an injection device, and is filled in a cavity space between a fixed mold and a movable mold, and is solidified to obtain a molded article. Further, a mold clamping device is disposed in order to perform mold closing, mold clamping, and mold opening by moving the movable mold with respect to the fixed mold.

The mold clamping device includes a hydraulic mold clamping device driven by supplying oil to a hydraulic cylinder and an electric mold clamping device driven by an electric motor, the electric mold clamping device being highly controllable and not polluting the periphery, and Energy efficiency is high and therefore widely used. At this time, the thrust is generated by driving the motor to rotate the ball screw, and the thrust is amplified by the toggle mechanism to generate a large clamping force.

However, in the electric mold clamping device of such a configuration, since the toggle mechanism is used, it is difficult to change the mold clamping force in the characteristics of the toggle mechanism, and the responsiveness and stability are poor, and the mold clamping cannot be controlled in the forming. force. Thus, the thrust generated by the ball screw can be directly used as a mold clamping device for the mold clamping force. At this time, the torque of the motor is proportional to the mold clamping force, so that the mold clamping force can be controlled during the forming.

However, in the conventional clamping device, the ball screw has low load resistance, and not only does not produce a large clamping force, but also the clamping force is generated. The torque of the motor fluctuates and changes. Further, in order to generate the mold clamping force, it is necessary to always supply a current to the motor, and the power consumption and heat generation amount of the motor increase. Therefore, it is necessary to increase the rated output of the motor by a corresponding amount, resulting in an increase in the cost of the mold clamping device.

Therefore, a mold clamping device that uses an adsorption force of an electromagnet for a mold clamping operation using a linear motor for a mold opening and closing operation has been proposed (for example, Patent Document 1).

(previous technical literature) (Patent Literature)

Patent Document 1: International Publication No. 05/090052

However, in the injection molding machine, in order to protect the mold or the like, a mechanical brake mechanism that forcibly stops the mold opening and closing operation when the predetermined condition is satisfied is provided. In the brake mechanism, a configuration in which a toggle mechanism is used for performing a mold clamping operation includes, for example, a rod-shaped member fixed to a movable platen and having a groove, and a locking member provided in a groove of the rear platen and embedded in the rod-shaped member. Mechanical locking is achieved by driving the locking member into the groove of the rod member by driving the locking member.

On the other hand, when the structure of the mold clamping device using the adsorption force of the electromagnet is used as described in Patent Document 1, if a rod-shaped member is provided between the movable platen and the rear platen, between the movable platen and the rear platen The distance changes due to the adjustment of the mold thickness, so that the length of the rod-shaped member becomes longer. problem. That is, the length of the rod-shaped member should be determined based on the maximum distance between the movable platen and the rear platen (minimum mold thickness), and therefore the length must be the stroke of the movable platen plus the thickness adjustment amount.

Accordingly, an object of the present invention is to provide an injection molding machine capable of using a mold clamping force generating mechanism that generates a mold clamping force based on an adsorption force of an electromagnet, and to minimize the length of a rod-shaped member constituting the brake mechanism.

In order to achieve the above object, an injection molding machine according to an aspect of the present invention includes a first fixing member to which a fixed mold is attached, and a second fixing member disposed to be fixed to the first fixing member. The first movable member is coupled to the movable mold, and the second movable member is coupled to the first movable member to move together with the first movable member, and cooperates with the second fixed member to form an electromagnet-based member. a mold clamping force generating mechanism that generates a mold clamping force; the rod-shaped member is disposed between the second movable member and the second fixing member, and one end is fixed to the second movable member and the second fixed member One of the other ends extends to the other of the second movable member and the second fixed member; and the locking member is detachable from the rod member at an engagement position with the rod member. The movement between the positions prevents the movement of the second movable member when the position is at the engagement position.

According to the present invention, it is possible to obtain an injection molding machine capable of using a mold clamping force generating mechanism that generates a mold clamping force based on the adsorption force of an electromagnet, and to minimize the length of the rod-shaped member constituting the brake mechanism.

Hereinafter, the best mode for carrying out the invention will be described with reference to the accompanying drawings. In the present embodiment, the moving direction of the movable platen when the mold is closed is set to the front, and the moving direction of the movable platen when the mold is opened is set to the rear, and the injection device is to be emitted. The moving direction of the screw is set to the front, and the moving direction of the screw at the time of measurement is set to the rear.

1 is a view showing a state in which the mold clamping device in the injection molding machine according to the embodiment of the present invention is closed, and FIG. 2 is a view showing a mold closing device in the injection molding machine according to the embodiment of the present invention. State diagram. In addition, in FIGS. 1 and 2, the hatched member indicates the main cross section.

In the figure, 10 is a mold clamping device, Fr is a frame (frame) of the injection molding machine, Gd is a guide member movable relative to the frame Fr, and 11 is placed on a guide member (not shown) or a frame Fr The upper fixed platen is disposed with the fixed platen 11 at a predetermined interval from the fixed platen 11, and the rear platen 13 is disposed between the fixed platen 11 and the rear platen 13 (only the figure is shown) 2 of the 4 tie rods 14). Further, the rear platen 13 is fixed with respect to the frame Fr.

The front end portion (the right end portion in the drawing) of the tie rod 14 is formed with a threaded portion (not shown), the nut n1 is screwed and fastened to the screw portion, whereby the distal end portion of the tie rod 14 is fixed to the fixed pressure plate 11. The rear end portion of the tie rod 14 is fixed to the rear pressure plate 13.

Further, the movable platen 14 is disposed so as to be opposed to the fixed platen 11 along the tie bar 14 and to be retractable in the mold opening and closing direction. Therefore, the movable platen 12 is fixed to the guide Gd, and a guide hole or a notch portion (not shown) through which the tie bar 14 is inserted is formed in a portion corresponding to the tie bar 14 in the movable platen 12. Further, an adsorption plate 22 to be described later is fixed to the guide Gd. The guide Gd may be provided separately from the suction plate 22 and the movable platen 12 as shown in the drawing, or may be formed of a unitary body that is common to the adsorption plate 22 and the movable platen 12.

Further, the fixed mold 15 is fixed to the fixed platen 11, and the movable mold 16 is fixed to the movable platen 12. The fixed mold 15 and the movable mold 16 are brought into contact with and separated by the advancement and retreat of the movable platen 12, and the mold closing, mold clamping, and mold opening are performed. Further, as the mold clamping is performed, a cavity space (not shown) is formed between the fixed mold 15 and the movable mold 16, and a resin (not shown) which is emitted from the injection nozzle 18 of the injection device 17 is filled in the cavity space. Further, the mold unit 19 is constituted by the fixed mold 15 and the movable mold 16.

The suction plate 22 is fixed to the guide Gd in parallel with the movable platen 12. Thereby, the suction plate 22 can move forward and backward more than the rear pressure plate 13. The adsorption plate 22 may be formed of a magnetic material. For example, the adsorption plate 22 may be composed of an electromagnetic laminated steel plate formed by laminating a thin plate made of a ferromagnetic material. Alternatively, the adsorption plate 22 can be formed by casting.

The linear motor 28 is provided on the guide Gd in order to advance and retract the movable platen 12. The linear motor 28 is provided with a stator 29 formed in parallel with the guide Gd on the frame Fr and corresponding to the moving range of the movable platen 12, and the movable member 31 is formed at the lower end of the movable platen 12 and the stator 29 And throughout the established range.

The mover 31 includes a core 34 and a coil 35. Further, the core 34 includes a plurality of magnetic pole teeth 33 that protrude toward the stator 29 and are formed at a predetermined pitch, and the coil 35 is wound around each of the magnetic pole teeth 33. Further, the magnetic pole teeth 33 are formed to be parallel to each other in a direction perpendicular to the moving direction of the movable platen 12. Further, the stator 29 includes a core (not shown) and a permanent magnet (not shown) which is formed to extend on the core. The permanent magnet is formed by alternately magnetizing the magnetic poles of the N pole and the S pole. The linear motor 28 is driven by supplying a predetermined current to the coil 35, and the movable member 31 is moved forward and backward. Accordingly, the movable platen 12 is advanced and retracted by the guide Gd, whereby mold closing and mold opening can be performed.

Further, in the present embodiment, the permanent magnet is disposed on the stator 29, and the coil 35 is disposed on the movable member 31. However, the coil may be disposed on the stator and the permanent magnet may be disposed on the movable member. At this time, since the coil does not move with the driving of the linear motor 28, the wiring for supplying electric power to the coil can be easily performed.

Further, the configuration is not limited to the configuration in which the movable platen 12 and the suction plate 22 are fixed to the guide Gd, and the movable member 31 of the linear motor 28 may be disposed on the movable platen 12 or the suction plate 22. Further, the mold opening and closing mechanism is not limited to the linear motor 28, and may be hydraulic or electric.

If the movable platen 12 advances and the movable mold 16 abuts against the fixed mold 15, then The mold is closed, and then the mold is closed. An electromagnet unit 37 for performing mold clamping is disposed between the rear platen 13 and the suction plate 22. Further, the center rod 39 that extends through the rear platen 13 and the suction plate 22 and that connects the movable platen 12 and the suction plate 22 is disposed to be movable forward and backward. The center rod 39 moves the suction plate 22 forward and backward in conjunction with the advancement and retraction of the movable platen 12 at the time of mold closing and mold opening, and transmits the suction force generated by the electromagnet unit 37 to the movable platen 12 at the time of mold clamping.

Further, the mold clamping device 10 is constituted by the fixed platen 11, the movable platen 12, the rear platen 13, the suction plate 22, the linear motor 28, the electromagnet unit 37, the center rod 39, and the like.

The electromagnet unit 37 includes an electromagnet 49 formed on the side of the rear platen 13 and an adsorption portion 51 formed on the side of the adsorption plate 22. Further, in a predetermined portion of the rear end surface of the rear platen 13, in the present embodiment, a groove 45 is formed around the center rod 39, a core 46 is formed inside the groove 45, and a yoke 47 is formed outside the groove 45. . Further, the coil 48 is wound around the core 46 in the groove 45. Further, the core 46 and the yoke 47 may be formed of an integral structure of a casting, or may be an electromagnetic laminated steel sheet formed by laminating a thin plate made of a ferromagnetic material.

Further, in the present embodiment, the electromagnet 49 may be formed separately from the rear platen 13, and the adsorption portion 51 may be formed separately from the adsorption plate 22, or the electromagnet may be formed as a part of the rear platen 13, and the adsorption portion may be used as the adsorption plate 22. Part of the formation. Further, the electromagnet and the adsorption portion may be arranged in reverse. For example, the electromagnet 49 may be provided on the side of the adsorption plate 22, and the adsorption portion may be provided on the side of the rear platen 13.

When the current is supplied to the coil 48 in the electromagnet unit 37, the electromagnet 49 is driven to adsorb the adsorption portion 51, thereby generating a mold clamping force.

The center rod 39 is disposed to be coupled to the suction plate 22 at the rear end portion and coupled to the movable platen 12 at the front end portion. Therefore, the center rod 39 advances together with the movable platen 12 at the time of mold closing to advance the suction plate 22, and retreats together with the movable platen 12 at the time of mold opening to retract the suction plate 22. Therefore, a hole 41 through which the center rod 39 is inserted is formed in the central portion of the rear platen 13.

The drive of the linear motor 28 and the electromagnet 49 of the mold clamping device 10 is controlled by the control unit 60. The control unit 60 includes a CPU, a memory, and the like, and further includes a circuit for supplying a current to the coils 35 of the linear motor 28 and the coils 48 of the electromagnets 49 based on the results calculated by the CPU. A load detector 55 is also connected to the control unit 60. The load detector 55 is provided at a predetermined position (a predetermined position between the fixed platen 11 and the rear platen 13) of at least one tie rod 14 in the mold clamping device 10, and detects the load applied to the tie bar 14. An example in which the load detector 55 is provided on the upper and lower tie bars 14 is shown. The load detector 55 is constituted by, for example, a sensor that detects the amount of extension of the tie rod 14. The load (strain) detected by the load detector 55 is sent to the control unit 60. The control unit 60 detects the mold clamping force based on the output of the load detector 55. Further, the control unit 60 is omitted in Fig. 2 for the sake of convenience.

Further, in the illustrated example, the mold thickness adjusting mechanism 44 is provided on the rear side of the suction plate 22. The mold thickness adjusting mechanism 44 is a mechanism that adjusts the relative position (i.e., the distance between the movable platen 12) and the suction plate 22 corresponding to the thickness of the mold device 19. The structure of the mold thickness adjustment mechanism 44 itself may be arbitrary. For example, the mold thickness adjustment mechanism 44 can be illustrated by The mold thickness adjustment motor changes the position of the center rod 39 with respect to the suction plate 22. Thereby, the position of the center rod 39 with respect to the suction plate 22 is adjusted, and the position of the movable platen 12 with respect to the fixed platen 11 is adjusted. That is, the mold thickness adjustment is performed by changing the relative position of the movable platen 12 and the suction plate 22.

Next, the operation of the mold clamping device 10 will be described.

The mold closing process is controlled by the mold opening and closing processing unit 61 of the control unit 60. In the state of FIG. 2 (the state at the time of mold opening), the die opening/closing processing unit 61 supplies a current to the coil 35. Next, the linear motor 28 is driven to advance the movable platen 12. As shown in Fig. 1, the movable mold 16 abuts against the fixed mold 15. At this time, a gap δ is formed between the rear platen 13 and the adsorption plate 22, that is, between the electromagnet 49 and the adsorption portion 51. In addition, the force required to close the mold is very small compared to the mold clamping force.

Next, the mold clamping processing unit 62 of the control unit 60 controls the mold clamping process. The mold clamping unit 62 supplies a current to the coil 48, and adsorbs the adsorption unit 51 by the adsorption force of the electromagnet 49. Accordingly, the mold clamping force is transmitted to the movable platen 12 through the suction plate 22 and the center rod 39, and the mold clamping is performed. When the mold clamping force at the time of starting the mold clamping is changed, the mold clamping processing unit 62 performs control to generate the target mold clamping force to be generated by the change, that is, the target mold clamping force in the steady state. The steady current value is supplied to the coil 48.

In addition, the mold clamping force is detected by the load detector 55. The detected mold clamping force is sent to the control unit 60, and the control unit 60 adjusts the current supplied to the coil 48 and performs feedback control in order to set the mold clamping force to the set value. During this period, the resin melted in the injection device 17 is ejected from the injection nozzle 18 and filled in the cavity space of the mold device 19.

When the resin in the cavity space is cooled and solidified, the mold opening and closing processing portion 61 controls the mold opening process. In the state of Fig. 1, the mold clamping processing unit 62 stops supplying current to the coil 48. Accordingly, the linear motor 28 is driven to retract the movable platen 12. As shown in Fig. 2, the movable mold 16 is placed at the retreat limit position to perform mold opening.

Here, the brake mechanism 90 will be described with reference to FIG. 3 and the subsequent figures. In addition, since it is a cross-sectional view in FIG. 1 and FIG. 2, the brake mechanism 90 is not shown. The brake mechanism 90 can be provided, for example, on the side of the injection molding machine.

Figure 3 is a diagram showing an embodiment of the brake mechanism 90. Fig. 4 is a cross-sectional view showing an example of the operation of the brake mechanism 90, and shows an example in which the locking member 94 is fitted into the rod member 92.

As shown in FIG. 3, the brake mechanism 90 is disposed between the rear platen 13 and the suction plate 22. Specifically, the brake mechanism 90 includes a rod-shaped member 92 and a locking member 94 that are disposed between the rear platen 13 and the suction plate 22.

The rod-shaped member 92 is a high-strength/rigid member made of metal or the like, and extends between the rear platen 13 and the suction plate 22. The rod member 92 may be a round rod or a corner rod and may have any cross-sectional shape. The rod-shaped member 92 actually has a length corresponding to the distance between the rear platen 13 and the suction plate 22 in the mold opening state (refer to Figs. 2 and 3). The rear end portion of the rod member 92 is combined with the suction plate 22. The front end of the rod member 92 extends to the rear platen 13. The rod-shaped member 92 moves forward together with the adsorption plate 22 at the time of mold closing (refer to arrow Y in Fig. 3). Further, the rod-shaped member 92 passes through such a forward movement (the same is true when moving rearward). The side of the rear platen 13 (directly in front of the paper surface in the third drawing) does not interfere with the rear platen 13.

The rod member 92 is formed with a plurality of brake grooves 93 (five in this example). The brake groove 93 is formed in a shape in which a locking member 94 to be described later is fitted. In addition, the number or interval of the brake grooves 93 may be arbitrary. As shown in FIGS. 3 and 4, the cross section of the brake groove 93 is a locking surface 93b which is vertically erected from the front side to the bottom surface 93c via the inclined surface 93a and on the rear side of the bottom surface 93c.

The locking member 94 is a high-strength/rigid member made of metal or the like, and has an end portion of the brake groove 93 that is fitted into the rod-shaped member 92 as shown in FIG. The locking member 94 can be disengaged from the braking groove 93 of the rod-shaped member 92 at the engagement position of the locking groove 93 of the rod-shaped member 92 (refer to FIG. 4(B)) (refer to FIG. 4 (A). )) Move between. The locking member 94 is driven by an actuator (not shown).

When the brake mechanism 90 does not operate, the locking member 94 is held at the disengaged position (refer to Fig. 4(A)). At this time, the rod-shaped member 92 and the adsorption plate 22 accompanying the rod-shaped member can move in the direction of the rear platen 13 (refer to arrow Y in FIG. 3) and in the opposite direction. That is, the mold opening and closing operation can be performed. On the other hand, when the brake mechanism 90 is operated, the locking member 94 is driven from the disengagement position to the engagement position (refer to FIG. 4(B)). At this time, the suction plate 22 cannot move in the direction of the rear pressure plate 13 by the force F (refer to FIG. 4(B)) that the rod-shaped member 92 receives from the locking surface 93b of the brake groove 93. In other words, when the locking member 94 abuts against the locking surface 93b of the brake groove 93, the suction plate 22 cannot move further forward.

The operation of the brake mechanism 90, that is, the switching control of the position of the locking member 94 can be realized by the control unit 60. When the predetermined condition in which the brake mechanism 90 is to be operated is established, the control unit 60 drives the locking member 94 to the engagement position by an actuator (not shown). The predetermined conditions are arbitrary and may include, for example, the case where the door of the injection molding machine is opened. Further, when the locking member 94 is driven to the engagement position, the locking member 94 is fitted into any one of the plurality of brake grooves 93. Specifically, the plurality of brake grooves 93 are provided to receive the locking member 94 even when the brake mechanism 90 is operated at any timing during the movement of the suction plate 22 at the time of mold closing. In addition, depending on the positional relationship between the suction plate 22 and the rear pressure plate 13 when the brake mechanism 90 is actuated, the locking member 94 may be directly embedded in the brake groove 93 when the brake mechanism 90 is operated, and may also be in contact with a portion other than the brake groove 93. And inserted into the brake groove 93 through the inclined surface 93a. The inclined surface 93a has a function of smoothly fitting the auxiliary locking member 94 into the brake groove 93 when the brake mechanism 90 in the closed mold is operated.

Further, in the examples shown in FIGS. 3 and 4, the plurality of brake grooves 93 are not formed continuously but are formed separately from each other based on the strength of the collision with the locking member 94. In other words, when the distance between the inclined surface 93a of the brake groove 93 on the front side and the locking surface 93b of the next brake groove 93 on the front side is zero, the top of the inclined surface 93a becomes sharp, and the lock is applied. The collision of the member 94 is disadvantageous in strength, and therefore a certain distance is provided between the inclined surface 93a of the brake groove 93 and the locking surface 93b of the adjacent brake groove 93. Further, in the examples shown in Figs. 3 and 4, the plurality of brake grooves 93 have the locking faces 93b on the rear side and the inclined faces 93a on the front side, so that the brake mechanism 90 is actually only issued when the mold is closed. Play a role. That is, even if the locking member 94 is fitted into the brake groove 93 during mold opening, the locking member 94 cannot be locked on the inclined surface 93a, so that the suction plate 22 is allowed to move rearward.

As described above, according to the brake mechanism 90 shown in FIG. 3, since the rod-shaped member 92 is provided between the rear platen 13 and the suction plate 22, the required length of the rod-shaped member 92 (the length in the mold opening and closing direction) is the stroke of the mold opening and closing. The amount can be. On the other hand, as a comparative example, when the same brake mechanism (and its rod-like member) is provided between the rear platen 13 and the movable platen 12, the rod-shaped member needs to correspond to the stroke amount and the mold thickness adjustment amount of the mold opening and closing. length. This is because the distance between the rear platen 13 and the suction plate 22 does not change due to the adjustment of the mold thickness, whereas the distance between the rear platen 13 and the movable platen 12 changes due to the adjustment of the mold thickness. Thus, by disposing the brake mechanism 90 between the pressure plate 13 and the suction plate 22 after the distance is not changed by the mold thickness adjustment, the length of the rod-shaped member 92 can be minimized.

Fig. 5 is a view showing the brake mechanism 90' of the other embodiment. Fig. 6 is a cross-sectional view showing a state in which the locking member 94 is fitted into the brake groove 93'.

The main difference between the brake mechanism 90' of the present embodiment and the brake mechanism 90 described with reference to Figs. 3 and 4 is that the rear brake groove 93 is replaced with the brake groove 93'. That is, the rod member 92' of the brake mechanism 90' is formed with a plurality of brake grooves 93 (four in this example) and a brake groove 93', and the brake groove 93' is formed on the rear side.

As shown in Figs. 5 and 6, the brake groove 93' has a cross section in which a vertical locking surface 93a' is fastened on the front side of the bottom surface 93c and a vertical locking surface 93b is provided on the rear side of the bottom surface 93c. Brake groove in the rod member 92' When the locking member 94 is fitted into the brake groove 93', the distance between the rear platen 13 and the suction plate 22 is set to a distance corresponding to the gap δ (refer to Fig. 1) at the time of mold clamping. In other words, in the state shown in Fig. 6, the suction plate 22 cannot be moved rearward (opening direction) by the force F1 of the locking member 94 from the locking surface 93a' of the brake groove 93'. The distance between the rear platen 13 and the suction plate 22 corresponds to the gap δ at the time of mold clamping. Thereby, in the case of mold replacement (including replacement for the purpose of mold repair), the so-called unpowered mold clamping of the mold to the fixed platen 11 or the movable platen 12 can be performed. Specifically, the brake mechanism 90' is operated in a state where the distance between the rear platen 13 and the suction plate 22 is the gap δ at the time of mold clamping. As a result, as shown in Fig. 6, the suction plate 22 cannot move rearward (opening direction) by the force F1 of the locking member 94 from the locking surface 93a' of the brake groove 93'. Thereby, in this state, the gap δ can be always maintained during mold replacement without driving the electromagnet 49, and the mold replacement operation can be performed efficiently. For example, when the locking member 94 is fitted into the brake groove 93', the movable platen 12 is advanced by the mold thickness adjusting mechanism 44, whereby a desired clamping force can be generated. Thereby, the main fixing operation of the mold device 19 can be performed while maintaining the desired mold clamping force between the fixed platen 11 and the movable platen 12.

Further, in the above embodiment, the "first fixing member" in the patent application corresponds to the fixed platen 11, and the "first movable member" in the patent application corresponds to the movable platen 12. Further, the "second fixing member" in the patent application scope corresponds to the rear pressing plate 13, and the "second movable member" in the patent application scope corresponds to the adsorption plate 22. Moreover, the first in the scope of patent application The groove "corresponds to the brake groove 93, and the "second groove" in the patent application scope corresponds to the brake groove 93'.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the invention.

For example, in the above embodiment, the inclined surface 93a is formed in the brake groove 93 to lock only the movement of the rear platen 13 in the mold closing direction, and the locking member 94 is smoothly fitted into the brake groove 93, but it is also possible to be in the card. The ends of the stopper members 94 form the same inclined faces to obtain the same effect.

Further, in the above embodiment, the locking member 94 is provided to the rear platen 13, but may be provided to other fixing members such as the frame Fr. For example, the locking member 94 may be configured to move from the frame Fr toward the upper side of the engagement position. At this time, the brake groove 93 (the same applies to the brake groove 93', the same applies hereinafter) may be formed on the lower surface side of the rod-shaped member 92 (the same as the rod-shaped member 92', the same applies hereinafter).

Further, in the above embodiment, the rod-shaped member 92 is fixed to the side of the suction plate 22, and the locking member 94 is provided on the side of the rear platen 13, but may have the opposite structure. That is, the rod-shaped member 92 is fixed to the rear platen 13 (or other fixing member such as the frame Fr), and the locking member 94 is provided on the adsorption plate 22. In the latter case, the rod member 92 can be constructed integrally with the frame Fr.

Further, in the above description, the mold clamping device 10 of a specific configuration is exemplified, but the mold clamping device 10 may be of any configuration that is closed by an electromagnet.

Fr‧‧ frame

Gd‧‧‧Guide

10‧‧‧Molding device

11‧‧‧Fixed platen

12‧‧‧ movable platen

13‧‧‧ rear platen

14‧‧‧ tied

15‧‧ ‧ fixed mode

16‧‧‧moving

17‧‧‧Injection device

18‧‧‧Injection nozzle

19‧‧‧Molding device

22‧‧‧Adsorption plate

28‧‧‧Linear motor

29‧‧‧ Stator

31‧‧‧ movable parts

33‧‧‧Magnetic teeth

34‧‧‧Magnetic core

35‧‧‧ coil

37‧‧‧Electromagnetic unit

39‧‧‧ center pole

41‧‧‧ hole

44‧‧‧Mold thickness adjustment mechanism

45‧‧‧ slots

46‧‧‧Magnetic core

47‧‧‧Y yoke

48‧‧‧ coil

49‧‧‧Electromagnet

51‧‧‧Adsorption Department

55‧‧‧Load detector

60‧‧‧Control Department

61‧‧‧Mold opening and closing processing department

62‧‧‧Molding Processing Department

90, 90’‧‧‧ brake mechanism

92, 92'‧‧‧ rod members

93, 93’‧‧‧ brake groove

93a‧‧‧ sloped surface

93a’‧‧‧ card stop

93b‧‧‧ card stop

94‧‧‧Clocking components

Fig. 1 is a view showing a state in which the mold clamping device in the injection molding machine according to the embodiment of the present invention is closed.

Fig. 2 is a view showing a state at the time of mold opening of the mold clamping device in the injection molding machine according to the embodiment of the present invention.

Figure 3 is a diagram showing an embodiment of the brake mechanism 90.

Fig. 4 is a cross-sectional view showing an example of the operation of the brake mechanism 90.

Fig. 5 is a view showing the brake mechanism 90' of the other embodiment.

Fig. 6 is a cross-sectional view showing a state in which the locking member 94 is fitted into the brake groove 93'.

13‧‧‧ rear platen

22‧‧‧Adsorption plate

94‧‧‧Clocking components

90‧‧‧ brake mechanism

92‧‧‧ rod members

93‧‧‧Brake slot

93b‧‧‧ card stop

93c‧‧‧ bottom

93a‧‧‧ sloped surface

Fr‧‧ frame

Claims (4)

An injection molding machine comprising: a first fixing member to which a fixed mold is attached; a second fixing member disposed to face the first fixing member; and a first movable member to which a movable mold is attached; a movable member that is coupled to the first movable member and that moves together with the first movable member, and that cooperates with the second fixed member to form a mold clamping force generating mechanism that generates a mold clamping force based on an adsorption force of the electromagnet; One end of the member is fixed to one of the second movable member and the second fixed member, and the other end extends to the other of the second movable member and the second fixed member; and the second movable member is The first movable member is coupled to move with the first movable member, and the second fixed member cooperates to form a mold clamping force generating mechanism that generates a mold clamping force based on the adsorption force of the electromagnet; and the second fixed member is disposed And a locking member that is movable between an engagement position that engages with the rod-shaped member and a disengaged position that is separated from the rod-shaped member; To the card to prevent the second movable member is moved together position. The injection molding machine according to claim 1, wherein the rod-shaped member is formed with a plurality of grooves into which the locking members at the engagement positions are fitted. An injection molding machine as described in claim 2, wherein The plurality of grooves include the first groove and the second groove. When the locking member is fitted into the first groove, the first groove functions to move the second movable member in the mold closing direction, and is embedded in the locking member. In the second groove, the second groove functions to lock the movement of the second movable member in the mold opening direction. The injection molding machine according to claim 3, wherein the second groove is formed at a position where the second movable member and the second member are formed when the locking member is fitted The distance between the fixing members becomes a distance corresponding to the gap at the time of mold clamping.