TWI501858B - 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, a clamping device capable of directly using the thrust generated by the ball screw as a mold clamping force can be proposed. 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 case of the configuration of the mold clamping device using the adsorption force of the electromagnet described in Patent Document 1, the lower surface of the fixed pressure plate that holds the fixed mold is supported by the frame or the like. However, in this configuration, heat transfer from the fixed platen to the frame occurs on the lower side of the fixed platen, and there is a problem that the heat distribution of the fixed platen is uneven (temperature gradient). This problem will have an adverse effect on formability.

Therefore, an object of the present invention is to reduce unevenness in heat distribution of a fixed platen in an injection molding machine.

In order to achieve the above object, according to an aspect of the present invention, a The injection molding machine includes: a frame; a first fixing member to which a fixed mold is attached; and a second fixing member disposed to face the first fixing member and allow the center rod to penetrate; the first movable member; The movable mold is mounted; and the second movable member is coupled to the first movable member by the center rod and coupled to the first movable member; and the second fixed member and the second movable member are configured to be adsorbed by the electromagnet A mold clamping force generating means for generating a mold clamping force includes a heat transfer suppressing means for suppressing heat transfer from the first fixing member to the frame between the first fixing member and the frame.

According to the present invention, it is possible to reduce unevenness in heat distribution of the fixed platen in the injection molding machine.

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. Further, in the first drawing, the cross section of the cut surface passing through the tie rod 14 is shown only in the Y portion.

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 provided with a rear platen 13 disposed at a predetermined interval from the fixed platen 11 and opposed to the fixed platen 11, and four tie rods 14 are placed between the fixed platen 11 and the rear platen 13 (only 4 is shown) Two of the root rods 14). Further, the rear platen 13 is fixed with respect to the frame Fr.

The rear end portion of the tie rod 14 is fixed to the rear pressure plate 13. A distal end portion (right end portion in the drawing) of the tie rod 14 is formed with a threaded portion (not shown), and 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. In the illustrated example, the front end portion of the tie bar 14 has a small diameter portion into which a hole of the plate 90 can be inserted. The plate 90 is fastened to the fixed platen 11 by bolts 92. Further, in the illustrated example, the tie rod 14 is inserted into the insertion hole 13a of the rear pressure plate 13 without a gap, but the insertion hole 13a of the rear pressure plate 13 may be left with a certain gap ( That is, separately, the tie rod 14 is inserted. At this time, heat conduction from the rear platen 13 to the tie rod 14 can be reduced.

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 In the guide Gd, 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 or 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 formed of an electromagnetic laminated steel plate formed by laminating a thin plate made of a ferromagnetic body. 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. 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. By supplying a predetermined current to the coil 35, the linear motor 28 is driven to advance and retract the movable member 31, whereby the movable platen 12 can be moved forward and backward 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.

When the movable platen 12 advances and the movable mold 16 comes into contact with the fixed mold 15, the mold is closed, and then the mold clamping is performed. 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.

In addition, the fixed platen 11, the movable platen 12, the rear platen 13, and the suction The attachment plate 22, the linear motor 28, the electromagnet unit 37, the center rod 39, and the like constitute the mold clamping device 10.

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 linear motor 28 and the electric motor of the mold clamping device 10 are controlled by the control unit 60. The drive of the magnet 49. 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 in accordance with 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 adjusting mechanism 44 can change the position of the center rod 39 with respect to the suction plate 22 by a mold thickness adjusting motor (not shown). 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. Then, the linear motor 28 is driven to make the movable pressure The plate 12 is advanced, and 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 so as to generate the target mold clamping force obtained 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.

Next, an embodiment of the support structure of the fixed platen 11 will be described with reference to Figs. 1 to 3 . Hereinafter, the transverse direction of the injection molding machine will be referred to as a mechanical width direction. In addition, the transverse direction of the injection molding machine and the 1 and 2 correspond to the vertical direction of the paper.

Fig. 3 is a cross-sectional view schematically showing a main portion cross section (a partial cross section of the Y portion in Fig. 1) of an embodiment of the support structure of the fixed platen 11.

In the support structure of the present embodiment, as shown in FIGS. 1 to 3, the fixed platen 11 is supported by the support member 800 on which the lower tie rod 14 is placed. The lower end of the support member 800 is fixed to the frame Fr. The upper end of the support member 800 supports the lower tie rod 14 in a slidable manner. In this manner, the fixed platen 11 is supported by the frame Fr through the lower tie rod 14 and the support member 800. A support member 800 is provided for each of the two tie bars 14 on the lower side. Therefore, the support member 800 supports the fixed platen 11 at two places in the machine width direction.

In this manner, the support member 800 is provided in a state in which only a part of the fixed platen 11 in the machine width direction is supported. Therefore, the amount of heat transmitted from the lower portion of the fixed platen 11 to the frame Fr can be reduced as compared with the comparative example in which the entire mechanical width direction of the fixed platen 11 is supported on the frame Fr. That is, the amount of heat transferred from the lower portion of the fixed platen 11 to the frame Fr can be reduced by reducing the actual contact area between the lower portion of the fixed platen 11 and the frame Fr. Thereby, it is possible to appropriately reduce the heat distribution unevenness (thermal gradient) of the fixed platen 11 caused by the temperature of the lower portion of the fixed platen 11 being lower than the upper temperature.

As described above, according to the present embodiment, unevenness in heat distribution of the fixed platen 11 can be appropriately reduced, and formability can be improved.

Here, a heat insulating portion can be formed between the support member 800 and the tie rod 14. For example, the heat insulating material may be coated on the support surface of the tie rod 14 of the support member 800. Similarly, the contact portion of the tie bar 14 with the support member 800 is Covering insulation materials are also available. Further, such a heat insulating portion may be formed at any portion of a path of heat transferred from the contact portion with the tie bar 14 to the frame Fr. Thereby, the heat transferred from the lower portion of the fixed platen 11 to the frame Fr can be further reduced.

Also, a low friction portion can be formed between the support member 800 and the tie rod 14. For example, the low friction material may be coated on the support surface of the tie rod 14 of the support member 800. Similarly, a low friction material may be applied to the contact portion of the tie bar 14 with the support member 800. Further, the low friction portion may be formed by a heat insulating material, that is, a heat insulating material having a small coefficient of friction may be used. Thereby, the heat transferred from the lower portion of the fixed platen 11 to the frame Fr can be reduced.

Further, as shown in Fig. 3, it is preferable that the support member 800 is attached to the frame Fr by the adjusting bolt 804. Thereby, the height of the support member 800 can be adjusted by rotating the adjustment bolt 804 or the support member 800, and the contact force with the tie rod 14 can be adjusted. Further, by allowing the support member 800 to move away from the frame Fr, it is possible to prevent the heat transfer through the support member 800 directly to the frame Fr.

Further, in the example shown in Fig. 3, the support member 800 is fixed to the frame Fr side, and the fixed pressure plate 11 side is slidably contacted with the tie bar 14, but may be reversed. That is, the support member 800 may be configured such that the fixed platen 11 side is fixed to the tie bar 14 or the like and the frame Fr side is slidably contacted to the frame Fr. Further, the support member 800 does not necessarily have to be directly fixed (or contacted) to the frame Fr, and may be fixed (or contacted) to a member integrated with the frame Fr (for example, a member fixed to the frame Fr). Further, the support member 800 may be formed integrally with the frame Fr.

Fig. 4 is a view schematically showing another embodiment of the height adjusting mechanism based on the adjusting bolt 804. In the example shown in Fig. 4, unlike the support member 800 having an L-shaped cross section shown in Fig. 3, the support member 801 has a convex cross-sectional shape. The support member 801 is in contact with the tie rod 14 on the upper surface of the convex cross-section portion for support. Further, the support member 801 is attached to the frame Fr by two adjustment bolts 804. Thereby, the height of the support member 801 can be adjusted by rotating the adjustment bolt 804, and the contact force with the tie rod 14 can be adjusted. Further, by allowing the support member 801 to move away from the frame Fr, it is possible to prevent the transmission support member 801 from directly transferring heat to the frame Fr.

Fig. 5 is a perspective view schematically showing another embodiment of the support structure of the fixed platen 11. Fig. 5 is a perspective view mainly showing the fixed platen 11 and the frame Fr as viewed from the rear side.

In the support structure of the present embodiment, as shown in Fig. 5, the fixed platen 11 is supported by the support member 802 on the frame Fr. The support member 802 is provided to support both end portions of the fixed platen 11 in the mechanical width direction. The lower surface of the support member 800 is fixed to the frame Fr, and the upper surface of the support member 800 supports the lower tie rod 14 in a slidable manner. Further, the support member 802 may be provided to support a portion of the fixed platen 11 in the mechanical width direction. For example, instead of or in addition to the both ends of the fixed platen 11 in the machine width direction, the support member 802 may be provided to support the fixed platen. The central portion of the mechanical width direction of 11.

Here, the support member 802 is preferably made of a heat insulating material. Alternatively, a heat insulating portion may be formed between the support member 802 and the fixed platen 11. For example, it may be covered on the support surface (upper surface) of the fixed platen 11 of the support member 800. Insulation materials. Similarly, the contact portion of the fixed platen 11 and the support member 800 may be covered with a heat insulating material. Thereby, the heat transferred from the lower portion of the fixed platen 11 to the frame Fr can be further reduced. Further, when the support member 802 is formed of a heat insulating material or when the heat insulating portion is formed between the support member 802 and the fixed platen 11, the support member 802 is not necessarily provided to support a portion of the fixed platen 11 in the mechanical width direction, and may be provided The entire mechanical width direction of the fixed platen 11 is supported. At this time, the heat distribution unevenness of the fixed platen 11 can be improved as compared with the comparative example in which the entire mechanical width direction of the fixed platen is supported by the frame Fr without including the heat insulating material.

Further, the support member 802 is preferably made of a low friction material. Alternatively, a low friction portion may be formed between the support member 802 and the fixed platen 11. For example, a low friction material may be coated on the support surface (upper surface) of the fixed platen 11 of the support member 800. Similarly, a low friction material may be applied to the contact portion of the fixed platen 11 with the support member 800. These can also be combined to achieve. That is, the support member 802 can be constructed of a low coefficient of friction insulating material. Moreover, a heat insulating portion having a low coefficient of friction can be formed between the support member 802 and the fixed platen 11. Thereby, the heat transferred from the lower portion of the fixed platen 11 to the frame Fr can be reduced.

Further, in the example shown in Fig. 5, the frame Fr side of the support member 802 is fixed, and the fixed platen 11 side is slidably contacted with the fixed platen 11, but may be reversed. That is, the support member 802 may be configured such that the side of the fixed platen 11 is fixed and the frame Fr side is slidably contacted with the frame Fr. Moreover, the support member 802 does not necessarily have to be directly fixed (or contacted) to the frame Fr, and may be fixed (or contacted) to be formed with the frame Fr. An integral component (for example, a member fixed to the frame Fr). Moreover, the support member 802 may be integrally formed with the fixed platen 11 or the frame Fr.

Fig. 6 is a cross-sectional view schematically showing several examples of preferred cross-sectional shapes of the support member 802. In the example shown in Fig. 5, the support member 802 is in surface contact with the fixed platen 11, but as shown in Fig. 6, it is preferable to contact the fixed platen 11 in a line contact or a point contact manner.

In the example shown in Fig. 6(A), the support member 802 is in line contact with the fixed platen 11. Specifically, the support member 802 has a cross-sectional shape in which the side of the fixed platen 11 is sharp. At this time, the support member 802 is not necessarily provided to support a portion of the fixed platen 11 in the mechanical width direction as shown in FIG. 5, and may be provided to support the entire mechanical width direction of the fixed platen 11. Further, the support member 802 can also be realized by a 'roller' that is rotatably embedded in the frame Fr.

Further, in the example shown in Fig. 6(A), as shown in Fig. 6(C), the support member 802 may be fixed to the side of the fixed platen 11 without being fixed to the side of the frame Fr. At this time, the support member 802 can also be realized by a 'roller' that rotatably buryes the fixed platen 11. Further, as described above, the support member 802 may be formed integrally with the fixed platen 11.

In the example shown in Fig. 6(B), the support member 802 is in point contact with the fixed platen 11. Specifically, the support member 802 has a spherical shape. Further, the support member 802 can also be realized by a 'ball' that is rotatably embedded in the frame Fr. Similarly, the support member 802 may be fixed to the side of the fixed platen 11 instead of being fixed to the side of the frame Fr. The support member 802 can also be realized by rotatably embedding the 'balls' of the fixed platen 11.

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. Further, the "heat transfer suppression means" in the scope of the patent application corresponds to the support members 800, 802.

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, although the above-described mold clamping device 10 having a specific configuration is exemplified, 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

800, 801, 802‧‧‧ support members

804‧‧‧Adjustment bolts

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.

Fig. 3 is a cross-sectional view showing a principal part of an embodiment of a support structure of the fixed platen 11.

Fig. 4 is a view schematically showing another embodiment of the height adjusting mechanism based on the adjusting bolt 804.

Fig. 5 is a perspective view schematically showing another embodiment of the support structure of the fixed platen 11.

Fig. 6 is a view schematically showing a preferred sectional shape of the support member 802. A cross-sectional view of several examples.

10‧‧‧Molding device

19‧‧‧Molding device

22‧‧‧Adsorption plate

13‧‧‧ rear platen

16‧‧‧moving

15‧‧ ‧ fixed mode

Δ‧‧‧ gap

12‧‧‧ movable platen

14‧‧‧ tied

55‧‧‧Load detector

11‧‧‧Fixed platen

N1‧‧‧ nut

51‧‧‧Adsorption Department

44‧‧‧Mold thickness adjustment mechanism

45‧‧‧ slots

18‧‧‧Injection nozzle

17‧‧‧Injection device

49‧‧‧Electromagnet

41‧‧‧ hole

39‧‧‧ center pole

48‧‧‧ coil

46‧‧‧Magnetic core

37‧‧‧Electromagnetic unit

13a‧‧‧ inserted through hole

90‧‧‧ plates

92‧‧‧ bolts

47‧‧‧Y yoke

Gd‧‧‧Guide

800‧‧‧Support members

Fr‧‧ frame

35‧‧‧ coil

33‧‧‧Magnetic teeth

34‧‧‧Magnetic core

29‧‧‧ Stator

31‧‧‧ movable parts

28‧‧‧Linear motor

804‧‧‧Adjustment bolts

60‧‧‧Control Department

61‧‧‧Mold opening and closing processing department

62‧‧‧Molding Processing Department

Claims (7)

An injection molding machine comprising: a frame; a first fixing member having a fixed mold attached thereto; and a second fixing member disposed to face the first fixing member and allowing the center rod to penetrate; the first movable member And a movable mold; and the second movable member is coupled to the first movable member by the center rod and coupled to the first movable member; and the second fixed member and the second movable member are configured by an electromagnet The mold clamping force generating means for generating a mold clamping force includes a heat transfer suppressing means for suppressing heat transfer from the first fixing member to the frame between the first fixing member and the frame, and the heat transfer suppressing means includes a support The member is coupled to one of the first fixing member and the frame, and is slidably contacted with the other first fixing member and the other square of the frame. The injection molding machine according to the first aspect of the invention, wherein the heat transfer suppressing means includes a support member that supports only a part of the first fixing member in the transverse direction of the injection molding machine. The injection molding machine according to the second aspect of the invention, wherein the support member is integrally formed with one of the first fixing member and the frame. The injection molding machine according to claim 1, wherein the heat transfer suppressing means includes a support member, the support member and the front One of the first fixing member and the frame is coupled to the first fixing member and the other square of the frame in point contact or line contact. The injection molding machine according to claim 1, wherein the heat transfer suppressing means comprises a heat insulating material. The injection molding machine according to claim 5, wherein the heat insulating member is provided in a state in which only a part of the first fixing member in the transverse direction of the injection molding machine is supported. The injection molding machine according to claim 2, wherein the support member is attached to the frame by an adjusting bolt.