TW201313441A - Injection molding machine - Google Patents

Abstract

The present invention provides an injection molding machine comprising components by associating laminated steel plates with an electromagnet and capable of coupling the steel plates together with a precise positional relationship. The injection molding machine of the present invention comprises: a first fixed component mounted with a fixed mold; a second fixed component arranged to oppose the first fixed component; a first movable component mounted with a movable mold; and a second movable component coupled to the first movable component and is movable together with the first movable component. The second fixed component and the second movable component constitute a mold clamping force generation mechanism that generates a mold clamping force by means of attractive force of the electromagnet. At least one of the second fixed component and the second movable component that constitute the mold clamping force generation mechanism comprises laminated steel plates that comprises a plurality of steel plates laminated together and forms thereon a slot extending in a predetermined direction and an insertion component that is inserted into the slot of the laminated steel plates. The slot has a cross-sectional shape that constrains the rotational motion of the laminated steel plate by means of the insertion component inserted into the slot.

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 has a hydraulic mold clamping device driven by supplying oil to a hydraulic cylinder and an electric mold clamping device driven by a motor, wherein the electric mold clamping device has high controllability and does not pollute It is widely used because it is peripheral and has high energy efficiency. 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 molding. force. Therefore, a mold clamping device capable of directly using the thrust generated by the ball screw as a mold clamping force is provided. At this time, since the torque of the motor is proportional to the mold clamping force, the mold clamping force can be controlled during molding.

However, in the conventional mold clamping device, the ball screw has low load resistance and cannot produce a large mold clamping force, and the mold clamping force is generated by the electric motor. The torque of the machine 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 the amount of heat generated by the motor are increased. Therefore, it is necessary to increase the rated output of the motor by a corresponding amount, resulting in a high 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 is considered (for example, Patent Document 1).

(previous technical literature) (Patent Literature)

Patent Document 1: International Publication No. 05/090052

However, when the structure of the mold clamping device using the adsorption force of the electromagnet described in Patent Document 1 is used, the response due to the generation of the eddy current is slow or the iron loss and the heat generated thereby become a problem, but it can be borrowed. This eddy current is eliminated by a member (typically a rear platen) which is formed of a laminated steel plate to form an electromagnet. However, when the laminated plate is composed of, for example, a rear platen, it is advantageous to combine (integrate) these steel plates in an accurate positional relationship.

Accordingly, it is an object of the present invention to provide an injection molding machine which is formed of a laminated steel sheet and which is associated with an electromagnet and which can join the rigid plates in a correct positional relationship.

In order to achieve the above object, according to one aspect of the invention, an injection molding machine is provided, comprising: a first fixing member having a fixed mold attached thereto; and a second fixing member disposed to be the first one The fixed member faces the first movable member, and the movable member is attached to the movable member; and the second movable member is coupled to the first movable member and moves together with the first movable member, and the second fixed member and the second movable member are configured A mold clamping force generating mechanism that generates a mold clamping force by an adsorption force of an electromagnet, and at least one of the second fixing member and the second movable member that constitutes the mold clamping force generating mechanism has a plurality of steel sheets laminated thereon and is formed to have a predetermined direction A laminated steel sheet having a groove extending in a direction and an insert member embedded in a groove of the laminated steel sheet, wherein the groove has a cross-sectional shape that restricts a rotational movement of the laminated steel sheet by an insert member embedded in the groove.

According to the present invention, it is possible to obtain an injection molding machine which can form a member associated with an electromagnet from a laminated steel sheet and combines the steel sheets in an accurate positional relationship.

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 of the mold clamping device, the moving direction of the movable platen when the mold is opened is set to the rear, and the injection device is injected. The moving direction of the screw is set to the front, and the direction of movement of the screw during metering is performed. It is set to the rear for explanation.

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 the first figure and the second figure, the member drawn with hatching shows the main cross section.

In the figure, 10 is a mold clamping device, Fr is a frame (bracket) of the injection molding machine, Gd is a guide member that moves relative to the frame Fr, and 11 is placed on a guide member (not shown) or on the frame Fr. The fixed pressure plate is disposed opposite to the fixed pressure plate 11 at a predetermined interval from the fixed pressure plate 11, and the rear pressure plate 13 is disposed. Four connecting rods 14 are disposed between the fixed pressure plate 11 and the rear pressure plate 13 (only 4 are shown in the figure). Two of the root connecting rods 14). An end portion of the connecting rod 14 on the side of the rear pressing plate 13 is coupled to an insert member 90 which will be described later. Further, the rear platen 13 is fixed with respect to the frame Fr.

Further, the movable platen 12 is disposed so as to face the fixed platen 11 along the connecting rod 14 and to move forward and backward in the mold opening and closing direction. Therefore, the movable platen 12 is fixed to the guide Gd, and a guide hole (not shown) through which the connecting rod 14 is inserted is formed in a portion corresponding to the connecting rod 14 in the movable platen 12. Further, an adsorption plate 22 to be described later is fixed to the guide Gd.

Further, the fixed mold 15 is fixed on the fixed platen 11, and the movable mold 16 is fixed on the movable platen 12. With the advancement and retreat of the movable platen 12, the fixed mold 15 and the movable mold 16 are in contact with each other to perform mold closing, mold clamping and mold opening. . 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 include an electromagnetic laminated steel sheet formed by laminating a thin plate containing a ferromagnetic body.

The linear motor 28 is provided on the guide Gd in order to advance and retract the movable platen 12. The linear motor 28 includes a stator 29 and a movable member 31. The stator 29 is formed in parallel with the guide Gd on the frame Fr and corresponds to the moving range of the movable platen 12. The movable member 31 is formed at the lower end of the movable platen 12 and the stator 29 And throughout the predetermined 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 coils 35 are wound around the respective 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) that is formed to extend over the core. The permanent magnet is formed by alternating magnetic poles of the N pole and the S pole and at the same pitch as the magnetic pole teeth 33. When the linear motor 28 is driven by supplying a predetermined current to the coil 35, the mover 31 is advanced and retracted, and 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 can be disposed on the stator and the permanent magnet can 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 provided 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. Further, in order to perform mold clamping, an electromagnet unit 37 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 mold clamping 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, and a core (inner pole) 46 is formed inside the groove 45, and more than the groove 45. A yoke (outer pole) 47 is formed on the outer side. Further, in the groove 45, the coil 48 is wound around the core 46. Further, a key groove 47a to be described later is formed on the surface of the rear pressure plate 13 on the side of the connecting rod 14 (rear yoke portion). The insert member 90 described later is fitted into the key groove 47a.

In addition, in the embodiment, the electromagnetic plate can be separated from the rear pressure plate 13 to form an electromagnetic The iron 49 is formed separately from the adsorption plate 22 to form the adsorption portion 51, and the electromagnet may be formed as a part of the rear pressure plate 13, and the adsorption portion may be formed as a part of the adsorption plate 22. 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.

In the electromagnet unit 37, when a current is supplied to the coil 48, the electromagnet 49 is driven to adsorb the adsorption portion 51, and a mold clamping force can be generated.

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. To this end, an angular hole 41 through which the center rod 39 is inserted is formed in a central portion of the rear platen 13. Further, when the rear platen 13 is composed of an electromagnetic laminated steel sheet, the electromagnetic laminated steel sheet of the corner hole 41 portion can be formed by division (refer to X1 of FIG. 3), or the corner hole 41 can be formed by processing after lamination. .

The control unit 60 controls the driving of the linear motor 28 and the electromagnet 49 of the mold clamping device 10. The control unit 60 includes a CPU, a memory, and the like, and further includes a circuit for supplying a current to the coil 35 of the linear motor 28 or the coil 48 of the electromagnet 49 based on the result 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 (predetermined position between the fixed platen 11 and the rear platen 13) of at least one of the connecting rods 14 in the mold clamping device 10, and detects the load applied to the connecting rod 14. An example in which the load detector 55 is provided on the upper and lower connecting rods 14 is shown. The load detector 55 is sensed, for example, by detecting the amount of elongation of the connecting rod 14. Composition. The load detected by the load detector 55 is sent to the control unit 60. Further, the control unit 60 is omitted in Fig. 2 for the sake of convenience.

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 sufficiently smaller than 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 via the suction plate 22 and the center rod 39, thereby performing mold clamping. When the mold clamping force is changed when the mold clamping is started, the mold clamping processing unit 62 performs control so as to generate a mold clamping force which is to be obtained according to the change, that is, a mold clamping force which is a target in a steady state. The required 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 in order to set the mold clamping force to a set value, and performs feedback control. During this time, 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.

If the resin in the cavity space is cooled and solidified, the mold opening and closing processing portion 61 Control 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 and the movable platen 12 is retracted. As shown in Fig. 2, the movable mold 16 is placed at the reverse limit position to perform mold opening.

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 adjustment mechanism 44 is a mechanism that adjusts the gap δ in accordance with the thickness of the mold device 19. 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 adsorption plate 22 can be adjusted, and the position of the adsorption|suction board 22 with respect to the fixed platen 11 and the movable platen 12 can be adjusted, and the clearance δ is set to the optimal value. That is, the mold thickness adjustment is performed by changing the relative position of the movable platen 12 and the suction plate 22.

Here, the characteristic structure of the present invention will be described with reference to the third and subsequent portions.

Fig. 3 is a perspective view showing a rear platen 13 of an embodiment (Embodiment 1) of the present invention. Fig. 4 shows several main sections of the rear platen 13, Fig. 4(A) is a cross-sectional view taken along line AA of Fig. 3, and Fig. 4(B) is a cross-sectional view taken along line BB of Fig. 3, 4 (C) is a cross-sectional view taken along line CC of Fig. 3. Fig. 5 is a view showing an example of other shapes of the key groove 47a. In addition, in the third figure and the fourth figure, the arrow h and the arrow V respectively show the left-right direction (horizontal direction) and the up-down direction (vertical direction) of the rear platen 13. However, since these directions vary depending on the setting state (direction) of the injection molding machine, it is for convenience. In addition, an arrow f indicates the front of the rear platen 13.

The rear platen 13 may be composed of an electromagnetic laminated steel plate. Further, the electromagnetic laminated steel sheet can be formed by laminating a thin plate (steel plate) including a ferromagnetic body via an insulating layer. Alternatively, the electromagnetic laminated steel sheet can be formed by laminating steel sheets in which an insulating layer is formed. In the example shown in Fig. 3, the steel sheets are laminated in the left-right direction (arrow h) of the rear platen 13. The rear platen 13 can also be formed by integrating a plurality of electromagnetic laminated steel sheets. For example, in the example shown in FIG. 3, the rear platen 13 is configured by integrating four electromagnetic laminated steel sheets divided by two lines X1 in the upper and lower directions corresponding to the corner holes 41. In addition, the number or division pattern (dividing direction, etc.) of the electromagnetic laminated steel sheets for integration is arbitrary. For example, in the example shown in FIG. 3, it is divided into the vertical direction (arrow V), but it may be divided into the left-right direction (arrow h). When a plurality of electromagnetic laminated steel sheets are integrated to form the rear pressure plate 13, the relatively large volume of the rear pressure plate 13 which is difficult to be formed of one laminated steel sheet can be formed. Further, a plurality of electromagnetic laminated steel sheets are integrated by an insert member 90 which will be described later.

As shown in Fig. 3, a groove 45 is formed in a rectangular shape in a rear end surface of the rear platen 13 when viewed vertically. Further, the core 46 is formed by the convex portion on the inner side surrounded by the groove 45.

As shown in FIGS. 3 and 4, a key groove 47a is formed in the front end surface of the rear platen 13. The key groove 47a may extend in any direction, but it is preferably formed in a direction in which the electromagnetic laminated steel sheets are stacked in the lamination direction from the viewpoint of manufacturability. That is, it is preferable that the key groove 47a is formed to extend in a direction perpendicular to the steel plate of the electromagnetic laminated steel sheet. As shown in Figs. 3 and 4, the key groove 47a can also extend in a straight line in a straight line.

In the example shown in Fig. 3, the cross-sectional shape of the key groove 47a is a trapezoidal shape (wedge shape) in which the inlet side (surface side) becomes a short side, and in this case, the surface corresponding to the trapezoidal oblique side constitutes the locking portion 47b (see the fourth section). Figure (A)). In addition, the cross-sectional shape of the key groove 47a may be any shape as long as the width of the bottom side is wider than the inlet side and has the locking portion 47b. For example, as shown in Fig. 5(A), the key groove 47a may have a T-shape in which the bottom side is widened, and as shown in Fig. 5(B), it may have an L-shape in which the bottom side is widened.

Fig. 6 is a perspective view showing an example of the fitting member 90 fitted in the key groove 47a of the pressure plate 13 shown in Fig. 3 .

The insert member 90 is formed of a material having a high strength/rigidity such as metal. The insert member 90 has a shape in which the key groove 47a of the rear platen 13 is actually embedded in a gapless manner. That is, the cross-sectional shape of the insert member 90 corresponds to the cross-sectional shape of the key groove 47a. That is, in the illustrated example, the cross-sectional shape of the insert member 90 is trapezoidal (wedge). However, in order to enable the sliding type insertion described later, the cross-sectional shape of the fitting member 90 may be a shape slightly smaller than the cross-sectional shape of the key groove 47a (for example, a similar shape that is reduced). Further, the fitting member 90 is preferably extended to have a length substantially the same as the length of the key groove 47a in the longitudinal direction (arrow h).

The fitting member 90 is inserted from the end side of the rear platen 13 in the left-right direction and is slidably fitted into the key groove 47a of the rear platen 13. At this time, the insert member 90 can be attached to an electromagnetic laminated steel sheet molded into a predetermined shape. For example, when the rear platen 13 is composed of a plurality of electromagnetic laminated steel sheets as described above, the insert member 90 is inserted into the key groove 47a corresponding to the plurality of electromagnetic laminated steel sheets. At this time, the fitting member 90 can exhibit a positioning function between a plurality of electromagnetic laminated steel sheets. also That is, a plurality of electromagnetic laminated steel sheets can be integrated with each other in an intended positional relationship via the fitting member 90. Also, since the insert member 90 is coupled to the connecting rod 14, a plurality of electromagnetic laminated steel sheets can be integrated with the connecting rod 14 via the insert member 90 in a desired positional relationship. Further, the electromagnetic laminated steel sheets constituting the rear platen 13 may be integrated after the respective steel plates are attached to the insert member 90. At this time, for example, even when the rear platen 13 is composed of one electromagnetic laminated steel plate, the fitting member 90 can function to position each steel plate.

Fig. 7 is a cross-sectional view showing only a main portion of the injection molding machine associated with the key groove 47a of the rear platen 13 and the fitting member 90.

As shown in Fig. 7, the connecting member 14 is coupled to the insert member 90. The bonding aspect may be any aspect including bolt bonding or the like. Therefore, the rear platen 13 is coupled to the connecting rod 14 via the insert member 90. In other words, the rear platen 13 is suspended in the suction direction by the connecting rod 14 via the fitting member 90. Thereby, it is possible to reduce the shearing force or bending stress which may be generated in the rear platen 13.

However, since the rear platen 13 adsorbs the adsorption portion 51 during the mold clamping process, the rear platen 13 receives its reaction force, as shown by the arrow P in Fig. 7, and is subjected to the tensile force. This tensile force acts in a direction in which the rear platen 13 is pulled out from the fitting member 90 coupled to the connecting rod 14. According to the present embodiment, the insertion member 90 is fitted into the key groove 47a having the locking portion 47b as described above, so that the rear pressure plate 13 can be prevented from being pulled out from the insertion member 90.

Figure 8 shows the anti-offset plate that can be mounted on the end face of the rear platen 13 A diagram of an example of the material 92.

As shown in Fig. 8, a retaining plate 92 for preventing the fitting member 90 from coming off the rear platen 13 in the left-right direction can be attached to the end surface of the rear platen 13 in the left-right direction (arrow h). The retaining plate 92 can also be fixed to the rear platen 13 (electromagnetic laminated steel plate) by welding or the like. The retaining plate 92 functions to open the opening in the left-right direction of the key groove 47a of the pressure plate 13 after the clogging, and prevents the fitting member 90 from falling out from the rear platen 13 in the left-right direction. Further, in the illustrated example, the retaining plate 92 has the same shape as the steel plate constituting the end surface of the rear platen 13 in the left-right direction, but is a plate that exhibits the above-described retaining function by at least partially blocking the key groove 47a of the rear platen 13 , can be any shape. Further, in the illustrated example, the retaining plate 92 is provided on both end faces of the rear platen 13 in the left-right direction, but may be provided only on one of the end faces. At this time, it is preferable that the insert member 90 is fixed to the retaining plate 92 provided only on one of the end faces.

Fig. 9 is a perspective view showing the platen 130 after another embodiment (Embodiment 2) of the present invention. Fig. 10 shows several main sections of the rear platen 130, Fig. 10(A) is a cross-sectional view taken along line AA of Fig. 9, and Fig. 10(B) is a cross-sectional view taken along line BB of Fig. 9, Figure 10 (C) is a cross-sectional view taken along line CC of Figure 9.

After the second embodiment, the pressure plate 130 is different from the pressure plate 13 after the first embodiment described above, and the main difference is that the polarization is formed by forming two poles. In the following, only the differences from the above-described first embodiment will be mainly described, and the same components as those in the above-described first embodiment will be denoted by the same reference numerals and will not be described.

In the example shown in Fig. 9, the rear platen 130 accommodates the coil (not The two sets of grooves 45A and 45B shown in the figure are formed in a rectangular shape in accordance with multipolarization (2-polarization) when viewed from the top. Further, each of the convex portions formed on the inner side formed by the groove 45A and the groove 45B forms two sets of cores 46A and 46B. However, the pattern of formation of the groove 45A and the groove 45B is various, and the number of poles is arbitrary.

The rear platen 130 may be composed of an electromagnetic laminated steel plate in the same manner as the rear platen 13. Further, the rear platen 130 may be formed by integrating a plurality of electromagnetic laminated steel sheets. For example, in the example shown in FIG. 9, the rear platen 130 is configured by integrating eight electromagnetic laminated steel sheets that are divided by two lines X1 in the up-down direction and the left-right direction by the corresponding corner holes 41. According to this divisional aspect, it is possible to form a plurality of electromagnetic laminated steel sheets from steel sheets having the same shape, which is advantageous in terms of production. For example, in the example shown in FIG. 9, four electromagnetic laminated steel sheets of four corners can be produced by a combination of steel sheets having the same shape, and each of the electromagnetic laminated steel sheets facing each other across the corner holes 41 can also be respectively used by Steel plates of the same shape are manufactured. In addition, the number or division pattern of the electromagnetic laminated steel sheets for integration is arbitrary. Further, a front end surface of the rear pressure plate 130 is formed with a key groove 47a in the same manner as the rear pressure plate 13. The insert member 90 is fitted in the key groove 47a in the same manner as in the above-described first embodiment (see Fig. 6).

When the platen 130 is used after realizing such multi-polarization, the same effects as those of the above-described first embodiment can be obtained. In particular, when multi-polarization is performed, the necessity of integrally forming the rear platen 130 from a plurality of electromagnetic laminated steel sheets becomes high (and the number of electromagnetic laminated steel sheets may increase), and in this point, the above-described embedded member 90 is more effectively exerted. Positioning function. And multipolarization When the electromagnetic laminated steel sheet is divided into a plurality of sheets, the width of the electromagnetic laminated steel sheet can be greatly reduced. Further, the thickness of the back yoke portion can be reduced by the multi-polarization effect, whereby the electromagnetic laminated steel sheet can be further reduced in size.

Further, in the second embodiment, as in the first embodiment, the retaining plate can be attached to the end surface of the rear platen 130 (refer to the retaining plate 92 of Fig. 8).

Fig. 11 is a view showing another example of the bonding state of the fitting member 90 and the connecting rod 14, and is a cross-sectional view of only a main portion in which the key groove 47a of the pressure plate 130 and the insert member 90 are associated with each other in the injection molding machine.

In the example shown in Fig. 11, the fitting member 90 is provided in correspondence with the two rows of key grooves 47a. The two insertion members 90 are coupled to each other via the joint member 94. The joint member 94 may be fixed to the two insert members 90 by, for example, a bolt or the like, or may be integrally formed with the two insert members 90. The joining member 94 is formed of a material having a higher strength/rigidity such as metal like the insert member 90. A connecting rod 14 is coupled to the connecting member 94. Thereby, the end portion of the connecting rod 14 on the side of the rear pressing plate 130 is coupled to the fitting member 90 via the coupling member 94. Thus, the two fitting members 90 can be fixed to the connecting rod 14 via one coupling member 94 that is coupled to the two fitting members 90 and that integrates the two fitting members 90.

Further, in the example shown in Fig. 11, the joint member 94 is applied to the press plate 130 after the above-described second embodiment, but the joint member 94 may be applied to the press plate 13 after the above-described first embodiment. In addition, the number of the insert members 90 to which the joint member 94 is coupled is arbitrary, and one joint member 94 can be connected. More than three embedded members 90 are knotted. Further, the coupling member 94 may be provided as an auxiliary member with respect to one of the fitting members 90.

Fig. 12 is a view showing another application example of the insert member 90, and is a cross-sectional view showing only a main portion of the injection molding machine associated with the key groove 22a of the suction plate 22 and the insert member 90. Further, the application example shown in Fig. 12 can be used alone or in combination with the above-described first embodiment or second embodiment.

In the application example shown in Fig. 12, the key groove 22a is formed in the adsorption plate 22 in the same manner as the key groove 47a of the pressure plate 13 after the first embodiment. The key groove 22a is formed on the surface of the suction plate 22 on the side of the mold thickness adjusting mechanism 44. The shape and the like of the key groove 22a may be the same as the key groove 47a of the pressure plate 13 after the first embodiment. The insert member 90 is inserted in the same manner as in the above-described Embodiment 1 to be slidably embedded in the key groove 22a. Further, the suction plate 22 can be attached to the end surface on one side of the opening of the key groove 22a in the same manner as in the above-described first embodiment (see the release preventing plate 92 of Fig. 8). Further, in the same manner, the adsorption plate 22 can be formed by integrating a plurality of electromagnetic laminated steel sheets.

The insert member 90 can be fixed or supported by a member constituting the mold thickness adjusting mechanism 44. For example, in the example shown in Fig. 12, the mold thickness adjusting mechanism 44 includes a gear 44a that is rotated by a mold thickness adjusting motor (not shown), meshes with the screw 43 of the center rod 39, and is coupled to the gear 44a (with the gear 44a). The mold roll adjustment rotary unit 44c and the support member 44b supporting the mold thickness adjustment rotary portion 44c are linearly moved (positionally adjusted) by the rotational movement thereof, and are fixed or supported on the support member 44b. Member 90. In addition, the junction between the support member 44b and the insert member 90 The conformation can be any aspect including the use of a combination of bolts. Further, the configuration of the mold thickness adjusting mechanism 44 shown in Fig. 12 is an example, and the mold thickness adjusting mechanism 44 can be realized by another configuration.

Fig. 13 is a cross-sectional view showing a main portion of the pressing plate 131 after another embodiment (Embodiment 3) of the present invention. In addition, the content of the present embodiment can also be applied to the adsorption plate 22.

As shown in Fig. 13, the insert member 90 has a flow path hole 91 for the temperature control fluid. The flow path hole 91 penetrates the fitting member 90 and extends in parallel with the lamination direction of the electromagnetic laminated steel sheets. Since the temperature-regulating fluid flows inside the insert member 90, unlike the case where the through-holes penetrating the electromagnetic laminated steel sheets in the stacking direction thereof become the flow paths, the temperature-regulating fluid does not leak from the steel sheets. Further, since the temperature control fluid is not in direct contact with the electromagnetic laminated steel sheet, corrosion of the electromagnetic laminated steel sheet can be prevented.

The tempering fluid exchanges heat with the electromagnetic laminated steel sheet and tempers the electromagnetic laminated steel sheet. The temperature control fluid can be a cooling medium such as cooling water or air. The refrigerant suppresses overheating of the coil 48 of the electromagnet 49 by cooling the electromagnetic laminated steel sheet. In addition, the temperature control fluid may also be a heat medium such as warm water.

Further, when the rear platen 131 has a plurality of insert members 90, the flow path holes 91 may be formed in at least one of the insert members 90.

The insert member 90 is inserted into the key groove 47a of the electromagnetic laminated steel sheet, and is fixed to the key groove 47a by, for example, a shrink fit or a shrink fit.

In the shrink fit, the insert member 90 is cooled and cooled by, for example, dry air or liquid nitrogen, and inserted into the key groove 47a of the electromagnetic laminated steel sheet at a higher temperature (for example, room temperature) than the insert member 90. After, if embedded When the temperature of the inlet member 90 is returned to the room temperature, the insert member 90 is expanded, and the outer wall of the insert member 90 is fastened by the inner wall of the key groove 47a.

In the hot press bonding, the electromagnetic laminated steel sheet is heated and the cross-sectional area of the key groove 47a of the electromagnetic laminated steel sheet is increased, and the insert member 90 at a lower temperature (for example, room temperature) than the electromagnetic laminated steel sheet is inserted into the key groove 47a. After that, when the temperature of the electromagnetic laminated steel sheet returns to room temperature, the cross-sectional area of the key groove 47a becomes small, and the fitting member 90 is fastened by the inner wall of the key groove 47a.

The gap between the inner wall of the key groove 47a and the outer wall of the fitting member 90 is reduced by the shrink fit or the shrink fit, and the contact thermal resistance is lowered, so that the temperature adjustment efficiency of the electromagnetic laminated steel sheet becomes good.

The metal piece 93 as the heat transfer member may be interposed between the inner wall of the key groove 47a and the outer wall of the insert member 90. The hardness of the metal piece 93 is low (soft) to the hardness of the insert member 90. The hardness of the metal piece 93 was measured by an indentation hardness test method before shrink-fitting or hot press-fitting. As the indentation hardness test method, for example, a Brinell hardness test method (JIS Z2243) can be used. For example, when the metal forming the insert member 90 is stainless steel, the metal as the metal piece 93 may be made of copper (Cu), aluminum (Al), tin (Sn), lead (Pb), silver (Ag), indium (In). Or an alloy containing any one or more of these. From the viewpoint of softness and cost, it is particularly suitable to use indium or an indium alloy.

In the shrink fit, the metal piece 93 is wound around the outer wall of the insert member 90, and the metal piece 93 and the insert member 90 are inserted into the key groove 47a of the electromagnetic laminated steel sheet. In the shrink fit, at least one of the insert member 90 and the metal piece 93 is cooled by a refrigerant before being inserted into the key groove 47a.

For example, when the insert member 90 is cooled only by the refrigerant before being inserted into the key groove 47a, the temperature of the insert member 90 is returned to the room temperature after the key groove 47a is inserted, and the metal piece 93 is sandwiched by the inner wall of the key groove 47a and the outer wall of the insert member 90. It is thinner. The deformation of the metal piece 93 may be elastic deformation or plastic deformation. The metal piece 93 is formed of a metal softer than the insert member 90, so that it is deformed to absorb the deviation of the gap between the inner wall of the key groove 47a and the outer wall of the insert member 90 to fill the gap, and adhere to the inner wall of the key groove 47a and the insert member. Both of the outer walls of 90 are on.

Further, when the metal piece 93 is cooled by the refrigerant and the thickness of the metal piece 93 is thinned before being inserted into the key groove 47a, the temperature of the metal piece 93 is returned to the room temperature after the key groove 47a is inserted, and the thickness of the metal piece 93 is thickened by the key groove. The inner wall of the 47a and the outer wall of the insert member 90 sandwich the metal piece 93. The metal piece 93 is deformed to compensate for the deviation of the gap between the inner wall of the absorbing key groove 47a and the outer wall of the insert member 90 to fill the gap, and adheres to both the inner wall of the key groove 47a and the outer wall of the insert member 90.

In the shrink fit, the metal piece 93 is wound around the outer wall of the insert member 90, and the metal piece 93 and the insert member 90 are inserted into the key groove 47a of the heated electromagnetic laminated steel sheet. After that, when the temperature of the electromagnetic laminated steel sheet returns to room temperature, the cross-sectional area of the key groove 47a becomes small, and the metal piece 93 is sandwiched by the inner wall of the key groove 47a and the outer wall of the fitting member 90. The metal piece 93 is deformed to compensate for the deviation of the gap between the inner wall of the absorbing key groove 47a and the outer wall of the insert member 90 to fill the gap, and adheres to both the inner wall of the key groove 47a and the outer wall of the insert member 90.

Thus, whether it is a shrink fit or a shrink fit, the metal sheet 93 is The deformation is made to fill the gap with the deviation of the gap between the inner wall of the absorbing key groove 47a and the outer wall of the insert member 90, and is adhered to both the inner wall of the key groove 47a and the outer wall of the insert member 90. Thereby, the contact thermal resistance is further lowered, and the temperature regulation efficiency of the electromagnetic laminated steel sheet becomes more favorable. Further, when the deviation of the gap is absorbed, since the soft metal piece 93 can be suppressed from being selectively deformed, the hard insertion member 90 is locally deformed, so that the damage of the insertion member 90 can be reduced.

Further, the heat transfer member of Fig. 13 is formed of metal, but has a thermal conductivity higher than that of air, and may be formed of a resin. Further, the heat transfer member has a sheet shape, but may have a ring shape.

Further, the insert member 90 of Fig. 13 is fixed to the key groove 47a by a shrink fit or a shrink fit, but the fixing method is not limited to the shrink fit and the shrink fit. For example, there is a method in which the insert member 90 is inserted into the key groove 47a, and the heated molten resin flows into a gap between the inner wall of the key groove 47a and the outer wall of the insert member 90, and the solidified molten resin is cooled. At this time, the resin layer as the heat transfer member is interposed between the inner wall of the key groove 47a and the outer wall of the insert member 90. The hardness of the resin layer is lower than the hardness of the insert member 90.

Further, in Fig. 13, the heat transfer member is interposed between the inner wall of the key groove 47a and the outer wall of the insert member 90, but there may be no heat transfer member. That is, the inner wall of the key groove 47a and the outer wall of the insert member 90 may be directly adhered by a shrink fit or a shrink fit.

Fig. 14 is a view showing a modification of Fig. 13. In the drawings, the same components as those in Fig. 13 are denoted by the same reference numerals, and their description is omitted.

In Fig. 13, a flow path hole 91 is formed in the insert member 90, and conversely, In the drawing, a flow path groove 95 for tempering fluid is formed on the front end surface of the insert member 90, and the cover member 97 is fixed to the front end surface of the insert member 90, which is different.

The cover member 97 is fixed to the fitting member 90 with a bolt or the like. A sealing member that prevents leakage of the temperature-controlling fluid may be interposed between the insert member 90 and the lid member 97. In addition, either the fixing of the cover member 97 and the fitting member 90 and the insertion of the inserting member 13 into the key groove 47a may be preceded.

The connecting rod 14 may be fixed to the cover member 97.

Further, when the rear platen has a plurality of insert members 90, the flow path grooves 95 may be formed in at least one of the insert members 90.

Fig. 15 is a cross-sectional view showing the main part of the pressing plate 132 after another embodiment (Embodiment 4) of the present invention. In addition, the content of the present embodiment can be combined with the contents of Embodiments 1 to 3, and can also be applied to the adsorption plate 22.

The rear platen 132 of Fig. 15 is different from the rear platen 13 of Fig. 7 in that it has the reinforcing member 98 for reinforcing the electromagnetic laminated steel sheet. Hereinafter, the description will be centered on differences.

The reinforcing member 98 is fixed to the side surface of the electromagnetic laminated steel sheet and/or the front end surface of the electromagnetic laminated steel sheet, for example, as shown in Fig. 15 . The reinforcing member 98 extends in parallel with the lamination direction of the electromagnetic laminated steel sheets, and is joined to each of the steel sheets of the electromagnetic laminated steel sheet by welding or the like.

A flow path hole 99 in which the temperature control fluid is formed is formed on the reinforcing member 98. The flow path holes 99 extend in parallel with the lamination direction of the electromagnetic laminated steel sheets. Since the tempering fluid flows inside the reinforcing member 98, it penetrates the electromagnetic direction in the stacking direction. When the through-holes of the laminated steel sheets are in the flow path, the temperature-regulating fluid does not leak from the steel sheets. Further, since the temperature control fluid does not directly contact the electromagnetic laminate steel sheet, the electromagnetic laminate steel sheet is prevented from being corroded.

The tempering fluid exchanges heat with the electromagnetic laminated steel sheet and tempers the electromagnetic laminated steel sheet. The temperature control fluid can be a cooling medium such as cooling water or air. The refrigerant suppresses overheating of the coil 48 of the electromagnet 49 by cooling the electromagnetic laminated steel sheet. In order to increase the cooling efficiency, the tempering fluid may additionally be a heat medium such as warm water.

The connecting rod 14 may be fixed to the reinforcing member 98 fixed to the front end surface of the electromagnetic laminated steel plate by bolts or the like.

Further, in Fig. 15, the flow path hole 99 is formed in the reinforcing member 98. However, as in Fig. 14, a flow path groove in which the temperature regulating fluid is formed on the reinforcing member 98, and the flow in which the reinforcing member 98 is formed may be formed. The cover member is fixed to the surface of the road groove.

Further, the flow path (flow path hole, flow path groove) of the temperature control fluid of the present embodiment is formed in the reinforcing member 98, but may be formed, for example, in the connection member 94 shown in Fig. 11 and the support shown in Fig. 12. Member 44b or the like.

Further, when the rear platen has a plurality of reinforcing members 98, a flow path hole or a flow path groove may be formed in at least one of the reinforcing members 98.

Fig. 16 is a cross-sectional view showing a main portion of the pressing plate 133 after another embodiment (Embodiment 5) of the present invention. In the sixteenth embodiment, the same components as those in the thirteenth embodiment (the third embodiment) will be denoted by the same reference numerals and will not be described. In addition, the content of the present embodiment can also be applied to the adsorption plate 22.

As shown in Fig. 16, the insertion member 90 is formed with an insertion hole 72 as an insertion portion of the insertion flow path tube 71. The flow pipe 71 penetrates the insert member 90 Just fine. Each of the insert members 90 is provided with one flow path tube 71, but a plurality of lines may be provided. Further, when the rear platen 133 has a plurality of the fitting members 90, the flow path tube 71 may be inserted into the insertion portion of at least one of the fitting members 90.

The flow path tube 71 is, for example, a cylindrical tube, and has a flow path of a temperature-regulating fluid inside. Since the temperature control fluid flows inside the flow path tube 71, and the temperature control fluid does not directly contact the insertion member 90, the insertion member 90 can be prevented from being corroded.

The tempering fluid exchanges heat with the rear platen 133 and tempers the rear platen 133. The temperature control fluid can be a cooling medium such as cooling water or air. The refrigerant suppresses overheating of the coil 48 of the electromagnet 49 by cooling the platen 133. In addition, the temperature control fluid may also be a heat medium such as warm water.

The flow tube 71 is inserted into the insertion hole 72 of the fitting member 90, and is fixed to the insertion hole 72 by, for example, a shrink fit or a shrink fit. The fixing of the flow path tube 71 in the insertion hole 72 of the fitting member 90 and the fixing of the fitting member 90 in the key groove 47a of the electromagnetic laminated steel sheet may be performed either at the front or at the same time.

In the shrink fit, the flow path tube 71 is inserted at a higher temperature than the flow path tube 71 by cooling the flow path tube 71 with a refrigerant such as dry air or liquid nitrogen, and reducing the outer diameter of the flow path tube 71 (for example). The insertion hole 72 of the insert member 90 at room temperature. Thereafter, when the temperature of the flow tube 71 returns to room temperature, the flow path tube 71 expands, and the outer wall of the flow path tube 71 is fastened by the inner wall of the insertion hole 72.

In the hot press fit, on the basis of heating the insert member 90 and increasing the diameter of the insertion hole 72 of the insert member 90, the specific insert member 90 A lower temperature (for example, room temperature) flow path tube 71 is inserted into the insertion hole 72. Thereafter, when the temperature of the fitting member 90 returns to room temperature, the diameter of the insertion hole 72 is reduced, and the outer wall of the flow path tube 71 is fastened by the inner wall of the insertion hole 72.

The gap between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71 is reduced by the shrink fit or the shrink fit, and the contact thermal resistance is lowered, so that the temperature regulation efficiency of the rear pressure plate 133 becomes good. The flow path tube 71 is constituted by a cylindrical tube, and the insertion hole 72 has a circular cross-sectional shape to uniformly tighten the outer wall of the flow path tube 71 by shrink fitting or hot press fitting.

The metal piece 73 as the heat transfer member may be interposed between the inner wall of the insertion hole 72 of the insert member 90 and the outer wall of the flow path tube 71. The hardness of the metal piece 73 is low (soft) in the hardness of the flow path tube 71 is preferable.

In the shrink fit, the metal piece 73 is wound around the outer wall of the flow path tube 71, and the metal piece 73 and the flow path tube 71 are inserted into the insertion hole 72 of the insertion member 90. In the shrink fit, at least one of the flow path tube 71 and the metal piece 73 is cooled by the refrigerant before being inserted into the insertion hole 72.

For example, when only the flow path tube 71 is cooled by the refrigerant before being inserted into the insertion hole 72, the temperature of the flow path tube 71 is returned to the room temperature after being inserted into the insertion hole 72, and the flow path tube 71 is expanded by the inner wall of the insertion hole 72. The metal piece 73 is sandwiched between the outer wall of the flow path tube 71 and becomes thinner. The deformation of the metal piece 73 may be elastic deformation or plastic deformation. Since the metal piece 73 is formed of a metal which is softer than the flow path tube 71, it is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71 to fill the gap and adhere to the insertion hole 72. Both the wall and the outer wall of the flow path tube 71.

In addition, only the metal piece is cooled by the refrigerant before being inserted into the insertion hole 72. When the thickness of the metal piece 73 is made thinner, the temperature of the metal piece 73 is returned to room temperature after being inserted into the insertion hole 72, and the thickness of the metal piece 73 is thickened by the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71. The metal piece 73 is clamped. The metal piece 73 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71 to fill the gap, and adheres to both the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71.

In the hot press fitting, the metal piece 73 is wound around the outer wall of the flow path tube 71, and the metal piece 73 and the flow path tube 71 are inserted into the insertion hole 72 of the heated insertion member 90. Thereafter, when the temperature of the fitting member 90 returns to room temperature, the diameter of the insertion hole 72 is reduced, and the metal piece 73 is sandwiched by the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71. The metal piece 73 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71 to fill the gap, and adheres to both the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71.

Thus, regardless of the shrink fit or the shrink fit, the metal piece 73 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 72 and the outer wall of the flow tube 71 to fill the gap and adhere to the insertion hole 72. Both the inner wall and the outer wall of the flow path tube 71. Thereby, the contact thermal resistance is further lowered, and the temperature regulation efficiency of the rear platen 133 is further improved. Further, when the deviation of the gap is absorbed, since the soft metal piece 73 can be selectively deformed, the hard channel tube 71 is locally deformed, so that the damage of the flow path tube 71 can be reduced.

Further, the heat transfer member of the present embodiment is formed of a metal, but has a thermal conductivity higher than that of air, and may be formed of a resin. And heat transfer The member is in the form of a sheet, but may also be in the shape of a ring.

In addition, the flow path tube 71 of the present embodiment is fixed to the insertion hole 72 by a shrink fit or a shrink fit, but the fixing method is not limited to the shrink fit and the shrink fit. For example, there is a method in which the flow path tube 71 is inserted into the insertion hole 72, and the heated molten resin flows into a gap between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71, and the solidified molten resin is cooled. At this time, the resin layer as the heat transfer member is interposed between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71. The hardness of the resin layer is lower than the hardness of the flow path tube 71.

Further, in the present embodiment, the heat transfer member is interposed between the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71, but there may be no heat transfer member. That is, the inner wall of the insertion hole 72 and the outer wall of the flow path tube 71 may be directly adhered by a shrink fit or a shrink fit.

Fig. 17 is a cross-sectional view showing the main portion of the pressing plate 134 after another embodiment (Embodiment 6) of the present invention. In the seventeenth embodiment, the same components as those in the thirteenth embodiment (the third embodiment) will be denoted by the same reference numerals and will not be described. In addition, the content of the present embodiment can also be applied to the adsorption plate 22.

As shown in Fig. 17, the insertion member 90 is formed with an insertion groove 76 as an insertion portion of the insertion flow path tube 75. The flow path tube 75 may pass through the fitting member 90. One flow path tube 75 is provided for each of the insert members 90, but a plurality of strips may be provided. Further, when the rear platen 134 has a plurality of the insertion members 90, the flow path tube 75 may be inserted into the insertion portion of at least one of the insertion members 90.

The flow path tube 75 is, for example, an angular tube, and has a flow path of a temperature-regulating fluid inside. Since the temperature control fluid flows inside the flow path tube 75, and the temperature regulation flow The body is not in direct contact with the insert member 90, and thus the insert member 90 can be prevented from being corroded.

The tempering fluid exchanges heat with the rear platen 134 and tempers the rear platen 134. The temperature control fluid can be a cooling medium such as cooling water or air. The refrigerant suppresses overheating of the coil 48 of the electromagnet 49 by cooling the platen 134. In addition, the temperature control fluid may also be a heat medium such as warm water.

The flow tube 75 is inserted into the insertion groove 76 of the insert member 90, and can be fixed to the insertion groove 76 by, for example, a shrink fit or a shrink fit. The fixing of the flow path tube 75 in the insertion groove 76 of the fitting member 90 and the fixing of the fitting member 90 in the key groove 47a of the electromagnetic laminated steel sheet may be performed either at the front or at the same time.

In the shrink fit, the flow path tube 75 is inserted into the insert member 90 at a higher temperature (for example, room temperature) than the flow path tube 75, after the flow path tube 75 is cooled and cooled by a refrigerant such as dry air or liquid nitrogen. Inserted into slot 76. Thereafter, when the temperature of the flow tube 75 returns to room temperature, the flow path tube 75 expands, and the outer wall of the flow path tube 75 is fastened to the mutually opposing inner walls (side walls) of the insertion grooves 193 having a rectangular cross section.

In the hot press fitting, on the basis of heating the insert member 90 and widening the groove width of the insertion groove 76 of the insert member 90, the flow path tube 75 at a lower temperature (for example, room temperature) than the insert member 90 is inserted into the insertion groove. 76. Thereafter, when the temperature of the fitting member 90 returns to room temperature, the groove width of the insertion groove 76 becomes narrow, and the outer wall of the flow path pipe 75 is fastened by the mutually opposing inner walls of the insertion grooves 76 having a rectangular cross section.

The gap between the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75 is cold The shrink fit or the shrink fit is reduced, and the contact thermal resistance is lowered, so that the temperature regulation efficiency of the rear platen 134 becomes good.

The metal piece 77 as the heat transfer member may be interposed between the inner wall of the insertion groove 76 of the fitting member 90 and the outer wall of the flow path tube 75. The hardness of the metal piece 77 is low (soft) in the hardness of the flow path tube 75 is preferable.

In the shrink fit, the metal piece 77 is wound around the outer wall of the flow path tube 75, and the metal piece 77 and the flow path tube 75 are inserted into the insertion groove 76 of the insertion member 90. In the shrink fit, at least one of the flow path tube 75 and the metal piece 77 is cooled by the refrigerant before being inserted into the insertion groove 76.

For example, when only the flow path tube 75 is cooled by the refrigerant before being inserted into the insertion groove 76, the temperature of the flow path tube 75 is returned to the room temperature after being inserted into the insertion groove 76, and the flow path tube 75 is expanded by the inner wall of the insertion groove 76. The metal piece 77 is sandwiched from the outer wall of the flow path tube 75 to be thin. The deformation of the metal piece 77 may be elastic deformation or plastic deformation. Since the metal piece 77 is formed of a metal which is softer than the flow path pipe 75, it is deformed to absorb the deviation of the gap between the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75 to fill the gap and adhere to the insertion groove 76. Both the wall and the outer wall of the flow path tube 75.

Further, when the metal sheet 77 is cooled by the refrigerant and the thickness of the metal piece 77 is thinned before being inserted into the insertion groove 76, the temperature of the metal piece 77 is returned to the room temperature after being inserted into the insertion groove 76, and the thickness of the metal piece 77 is thickened. The metal piece 77 is sandwiched by the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75. The metal piece 77 is deformed to absorb the deviation of the gap between the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75 to fill the gap, and adheres to both the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75.

In the hot press fitting, the metal piece 77 is wound around the outer wall of the flow path tube 75, and the metal piece 77 and the flow path tube 75 are inserted into the insertion groove 76 of the heated insertion member 90. Thereafter, when the temperature of the fitting member 90 returns to room temperature, the groove width of the insertion groove 76 becomes narrow, and the metal piece 77 is sandwiched by the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75. The metal piece 77 is deformed to absorb the deviation of the gap between the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75 to fill the gap, and adheres to both the inner wall of the insertion groove 76 and the outer wall of the flow path pipe 75.

Thus, regardless of the shrink fit or the shrink fit, the metal sheet 77 is deformed to absorb the deviation of the gap between the inner wall of the insertion groove 76 and the outer wall of the flow tube 75 to fill the gap and adhere to the insertion groove 76. Both the inner wall and the outer wall of the flow path tube 75. Thereby, the contact thermal resistance is further lowered, and the temperature regulation efficiency of the rear platen 134 becomes more favorable. Further, when the deviation of the gap is absorbed, the soft metal sheet 77 can be prevented from being selectively deformed, and the hard passage tube 75 is locally deformed, so that the damage of the flow tube 75 can be reduced.

Further, the heat transfer member of the present embodiment is formed of a metal, but may have a thermal conductivity higher than that of air, and may be formed of a resin. Further, the heat transfer member has a sheet shape, but may have a ring shape.

In addition, the flow path tube 75 of the present embodiment is fixed to the insertion groove 76 by a shrink fit or a shrink fit, but the fixing method is not limited to the shrink fit and the shrink fit. For example, a method in which the flow path tube 75 is inserted into the insertion groove 76, and the heated molten resin flows into a gap between the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75, and the solidified molten resin is cooled. At this time, the resin layer as the heat transfer member is interposed between the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75. between. The hardness of the resin layer is lower than the hardness of the flow path tube 75.

Further, in the present embodiment, the heat transfer member is interposed between the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75, but there may be no heat transfer member. That is, the inner wall of the insertion groove 76 and the outer wall of the flow path tube 75 may be directly adhered by a shrink fit or a shrink fit.

Fig. 18 is a cross-sectional view showing a main portion of the pressing plate 135 after still another embodiment (Embodiment 7) of the present invention. In the eighteenth embodiment, the same components as those in the fifteenth embodiment (the fourth embodiment) will be denoted by the same reference numerals and will not be described. In addition, the content of the present embodiment can also be applied to the adsorption plate 22. Further, the content of the present embodiment can also be applied to the joint member 94 shown in Fig. 11, the support member 44b shown in Fig. 12, and the like.

As shown in Fig. 18, an insertion hole 82 as an insertion portion of the insertion flow path tube 81 is formed in the reinforcing member 98. The flow path tube 81 may pass through the reinforcing member 98. Each of the reinforcing members 98 is provided with one flow path tube 81, and a plurality of lines can be provided. Further, when the rear platen 135 has a plurality of reinforcing members 98, the flow path tube 81 may be inserted into the insertion portion of at least one of the reinforcing members 98.

The flow path tube 81 is, for example, a cylindrical tube, and has a flow path of a temperature-regulating fluid inside. The tempering fluid flows inside the flow path pipe 81, and the tempering fluid does not directly contact the reinforcing member 98, so corrosion of the reinforcing member 98 can be prevented.

The tempering fluid exchanges heat with the rear platen 135 and tempers the rear platen 135. The temperature control fluid can be a cooling medium such as cooling water or air. The refrigerant suppresses overheating of the coil 48 of the electromagnet 49 by cooling the platen 135. In addition, the temperature control fluid may also be a heat medium such as warm water.

The flow path tube 81 is inserted into the insertion hole 82 of the reinforcing member 98, and can be fixed to the insertion hole 82 by, for example, a shrink fit or a shrink fit. The fixing of the flow path tube 81 in the insertion hole 82 of the reinforcing member 98 and the fixing of the reinforcing member 98 to the electromagnetic laminated steel sheet may be preceded.

In the shrink fit, the flow path tube 81 is inserted at a higher temperature than the flow path tube 81 by cooling the flow path tube 81 with a refrigerant such as dry air or liquid nitrogen, and reducing the outer diameter of the flow path tube 81 (for example). The expansion member 98 of the room temperature is inserted into the hole 82. Thereafter, when the temperature of the flow path tube 81 returns to room temperature, the flow path tube 81 expands, and the outer wall of the flow path tube 81 is fastened by the inner wall of the insertion hole 82.

In the hot press fitting, on the basis of heating the reinforcing member 98 and increasing the diameter of the insertion hole 82 of the reinforcing member 98, the flow path tube 81 having a lower temperature (for example, room temperature) than the reinforcing member 98 is inserted into the insertion hole 82. in. Thereafter, when the temperature of the reinforcing member 98 returns to room temperature, the diameter of the insertion hole 82 is reduced, and the outer wall of the flow path tube 81 is fastened by the inner wall of the insertion hole 82.

The gap between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81 is reduced by the shrink fit or the shrink fit, and the contact thermal resistance is lowered, so that the temperature regulation efficiency of the rear pressure plate 135 becomes good. The flow path tube 81 is constituted by a cylindrical tube, and the insertion hole 82 has a circular cross-sectional shape to uniformly tighten the outer wall of the flow path tube 81 by shrink fitting or hot press fitting.

The metal piece 83 as a heat transfer member is interposed between the inner wall of the insertion hole 82 of the reinforcing member 98 and the outer wall of the flow path tube 81. The hardness of the metal piece 83 is low (soft) in the hardness of the flow path tube 81 is preferable.

In the shrink fit, the metal piece 83 is wound around the outer wall of the flow path tube 81, and the metal piece 83 and the flow path tube 81 are inserted into the reinforcing member 98. Into the hole 82. In the shrink fit, at least one of the flow path tube 81 and the metal piece 83 is cooled by the refrigerant before being inserted into the insertion hole 82.

For example, when only the flow path tube 81 is cooled by the refrigerant before being inserted into the insertion hole 82, the temperature of the flow path tube 81 is returned to the room temperature after being inserted into the insertion hole 82, and the flow path tube 81 is expanded by the inner wall of the insertion hole 82. The metal piece 83 is sandwiched from the outer wall of the flow path tube 81 to be thin. The deformation of the metal piece 83 may be elastic deformation or plastic deformation. Since the metal piece 83 is formed of a metal which is softer than the flow path tube 81, it is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81 to fill the gap and adhere to the inside of the insertion hole 82. Both the wall and the outer wall of the flow path tube 81.

Further, when the metal sheet 83 is cooled by the refrigerant and the thickness of the metal piece 83 is thinned before being inserted into the insertion hole 82, the temperature of the metal piece 83 is returned to the room temperature after being inserted into the insertion hole 82, and the thickness of the metal piece 83 is thickened. The metal piece 83 is sandwiched by the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81. The metal piece 83 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81 to fill the gap, and adheres to both the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81.

In the hot press fitting, the metal piece 83 is wound around the outer wall of the flow path pipe 81, and the metal piece 83 and the flow path pipe 81 are inserted into the insertion hole 82 of the heated reinforcing member 98. Thereafter, when the temperature of the reinforcing member 98 returns to room temperature, the diameter of the insertion hole 82 is reduced, and the metal piece 83 is sandwiched by the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81. The metal piece 83 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81 to fill the gap, and adheres to both the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81. on.

Thus, regardless of the shrink fit or the shrink fit, the metal piece 83 is deformed to absorb the deviation of the gap between the inner wall of the insertion hole 82 and the outer wall of the flow tube 81 to fill the gap and adhere to the insertion hole 82. Both the inner wall and the outer wall of the flow path tube 81 are placed. Thereby, the contact thermal resistance is further lowered, and the temperature regulation efficiency of the rear platen 135 is further improved. Further, when the deviation of the gap is absorbed, since the soft metal piece 83 can be suppressed from being selectively deformed, the hard channel tube 81 is locally deformed, so that the damage of the flow path tube 81 can be reduced.

Further, the heat transfer member of the present embodiment is formed of a metal, but has a thermal conductivity higher than that of air, and may be formed of a resin. Further, the heat transfer member has a sheet shape, but may have a ring shape.

In addition, the flow path tube 81 of the present embodiment is fixed to the insertion hole 82 by a shrink fit or a shrink fit, but the fixing method is not limited to the shrink fit and the shrink fit. For example, there is a method in which the flow path tube 81 is inserted into the insertion hole 82, and the heated molten resin flows into a gap between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81, and the solidified molten resin is cooled. At this time, the resin layer as the heat transfer member is interposed between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81. The hardness of the resin layer is lower than the hardness of the flow path tube 81.

Further, in the present embodiment, the heat transfer member is interposed between the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81, but there may be no heat transfer member. That is, the inner wall of the insertion hole 82 and the outer wall of the flow path tube 81 may be directly adhered by a shrink fit or a shrink fit.

In addition, the reinforcing member 98 of the present embodiment is formed as an insertion flow. Instead of the insertion hole, the insertion hole 82 of the insertion portion of the road tube 81 may be formed in the same manner as in the sixth embodiment of Fig. 17 .

Further, in the above embodiment, the "first fixing member" in the patent application scope corresponds to the fixed pressing plate 11, and the "first movable member" in the patent application scope corresponds to the movable pressing plate 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. However, as a modification, 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. In the case of this modification, the "second fixing member" corresponds to the adsorption plate 22, and the patent application scope is The "second movable member" corresponds to the rear platen 13. Further, in the above embodiment, the "groove" in the scope of the patent application corresponds to the key groove 47a and/or the key groove 22a.

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 rear platen 13, 130, 131, 133, 134 and the suction plate 22 are formed with a key groove 47a and a key groove 22a having a width wider than the inlet side on the bottom side, but may be formed other than a circular cross section. A groove of a cross-sectional shape is substituted for the key groove 47a and the key groove 22a. At this time, the fitting member 90 fitted in the groove can also restrict the displacement of the rear platens 13, 130, 131, 133, 134 and the suction plate 22 in the rotational direction, and can exhibit the positioning function.

Further, in the above embodiment, the rear platens 13, 130, 131, 133, and 134 and the suction plate 22 are composed of an electromagnetic laminated steel plate. However, when the key groove 47a or the key groove 22a is not formed, it may be constituted by an integral structure of the casting. For example, when the application example shown in Fig. 12 is used alone, the rear platen 13 can also be composed of an integral structure of the casting. Further, when the application example shown in Fig. 12 is not employed, the suction plate 22 may be constituted by an integral structure of the casting.

Further, in the above embodiment, two insertion members 90 are provided corresponding to the two rows of key grooves 47a, but the number of the key grooves 47a and the insertion members 90 is arbitrary.

For the above description, the following request items are further defined.

(Request 1)

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 be mounted And the second movable member is coupled to the first movable member and moves together with the first movable member, and the second fixed member and the second movable member constitute a clamping force for generating a clamping force by an adsorption force of the electromagnet a force generating mechanism, wherein at least one of the second fixing member and the second movable member that constitutes the mold clamping force generating means has a laminated steel sheet in which a plurality of steel sheets are laminated, and a reinforcing member that reinforces the laminated steel sheet, wherein the reinforcing member has The flow path of the tempering fluid.

(Request 2)

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 be mounted And the second movable member is coupled to the first movable member and moves together with the first movable member, and the second fixed member and the second movable member constitute a clamping force for generating a clamping force by an adsorption force of the electromagnet Force generating mechanism At least one of the second fixing member and the second movable member of the mold clamping force generating mechanism has a laminated steel sheet in which a plurality of steel sheets are laminated, and a reinforcing member that reinforces the laminated steel sheet, and is formed in the insertion portion of the reinforcing member. A flow path tube through which the tempering fluid flows is inserted, and the flow path tube is fixed to the insertion portion by a shrink fit or a shrink fit.

(Request 3)

The injection molding machine according to claim 2, wherein the heat transfer member is interposed between an inner wall of the insertion portion and an outer wall of the flow path tube.

(Request 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 be mounted And the second movable member is coupled to the first movable member and moves together with the first movable member, and the second fixed member and the second movable member constitute a clamping force for generating a clamping force by an adsorption force of the electromagnet a force generating means, wherein at least one of the second fixing member and the second movable member that constitutes the mold clamping force generating means has a laminated steel sheet in which a plurality of steel sheets are laminated, and a reinforcing member that reinforces the laminated steel sheet is formed in the The insertion portion of the reinforcing member is inserted into a flow path tube through which the temperature-regulating fluid flows, and the heat transfer member is interposed between the inner wall of the insertion portion and the outer wall of the flow path tube.

(Request 5)

The injection molding machine according to any one of claims 2 to 4, wherein the heat transfer member has a hardness lower than a hardness of the flow path tube.

Fr‧‧ frame

Gd‧‧‧Guide

10‧‧‧Molding device

11‧‧‧Fixed platen

12‧‧‧ movable platen

13, 130‧‧‧ rear platen

14‧‧‧ Connecting rod

15‧‧ ‧ fixed mode

16‧‧‧moving

17‧‧‧Injector

18‧‧‧Injection nozzle

19‧‧‧Molding device

22‧‧‧Adsorption plate

22a‧‧‧ keyway

28‧‧‧Linear motor

29‧‧‧ Stator

31‧‧‧ movable parts

33‧‧‧Magnetic teeth

34‧‧‧ core

35‧‧‧ coil

37‧‧‧Electromagnetic unit

39‧‧‧ center pole

41‧‧‧ corner hole

43‧‧‧Thread

44‧‧‧Mold thickness adjustment mechanism

44a‧‧‧ gear

44b‧‧‧Support members

44c‧‧•Mould thickness adjustment rotating part

45, 45A, 45B‧‧‧ slots

46, 46A, 46B‧‧‧ core

47‧‧‧Y yoke

47a‧‧‧ keyway

47b‧‧‧Cards

48‧‧‧ coil

49‧‧‧Electromagnet

51‧‧‧Adsorption Department

55‧‧‧Load detector

60‧‧‧Control Department

61‧‧‧Mold opening and closing processing department

62‧‧‧Molding Processing Department

71‧‧‧Flow pipe

72‧‧‧ insertion hole

73‧‧‧heat transfer member (metal piece)

75‧‧‧Flow pipe

76‧‧‧Flow pipe

77‧‧‧ Insert slot

78‧‧‧heat transfer member (metal piece)

81‧‧‧Flow pipe

82‧‧‧ insertion hole

83‧‧‧heat transfer member (metal piece)

90‧‧‧ embedded components

91‧‧‧Flow hole

92‧‧‧Anti-off sheet

93‧‧‧heat transfer member (metal piece)

94‧‧‧Connected components

95‧‧‧flow channel

97‧‧‧Cover components

98‧‧‧Strength building blocks

99‧‧‧Flow hole

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 perspective view showing the platen 13 after an embodiment (Embodiment 1) of the present invention.

Fig. 4(A) is a cross-sectional view taken along line AA of Fig. 3, Fig. 4(B) is a cross-sectional view taken along line BB of Fig. 3, and Fig. 4(C) is a line CC along Fig. 3 Sectional view.

Fig. 5 is a view showing an example of other shapes of the key groove 47a.

Fig. 6 is a perspective view showing an example of the fitting member 90 embedded in the key groove 47a of the pressure plate 13 shown in Fig. 3 .

Fig. 7 is a cross-sectional view showing only a main portion of the injection molding machine associated with the key groove 47a of the rear platen 13 and the fitting member 90.

Fig. 8 is a view showing an example of the retaining plate 92 which can be attached to the end surface of the rear platen 13.

Fig. 9 is a perspective view showing the platen 130 after another embodiment (Embodiment 2) of the present invention.

Fig. 10(A) is a cross-sectional view taken along line AA of Fig. 9, Fig. 10(B) is a cross-sectional view taken along line BB of Fig. 9, and Fig. 10(C) is a line CC along Fig. 9. Sectional view.

Fig. 11 is a view showing another example of the joint of the insert member 90 and the connecting rod 14, and is only for extracting the post-pressing plate in the injection molding machine. A cross-sectional view of a main portion of the key groove 47a of 130 and the embedded member 90.

Fig. 12 is a view showing another application example of the insert member 90, and is a cross-sectional view showing only a main portion of the injection molding machine associated with the key groove 22a of the suction plate 22 and the insert member 90.

Fig. 13 is a cross-sectional view showing the main part of the rear platen 131 of another embodiment (Embodiment 3) of the present invention.

Fig. 14 is a cross-sectional view showing a modification of Fig. 13.

Fig. 15 is a cross-sectional view showing the main part of the pressing plate 132 after another embodiment (Embodiment 4) of the present invention.

Fig. 16 is a cross-sectional view showing a main portion of the pressing plate 133 after another embodiment (Embodiment 5) of the present invention.

Fig. 17 is a cross-sectional view showing the main portion of the pressing plate 134 after another embodiment (Embodiment 6) of the present invention.

Fig. 18 is a cross-sectional view showing a main portion of the pressing plate 135 after still another embodiment (Embodiment 7) of the present invention.

Gd‧‧‧Guide

Fr‧‧ frame

Δ‧‧‧ gap

10‧‧‧Molding device

11‧‧‧Fixed platen

12‧‧‧ movable platen

13‧‧‧ rear platen

14‧‧‧ Connecting rod

15‧‧ ‧ fixed mode

16‧‧‧moving

17‧‧‧Injector

18‧‧‧Injection nozzle

19‧‧‧Molding device

22‧‧‧Adsorption plate

28‧‧‧Linear motor

29‧‧‧ Stator

31‧‧‧ movable parts

33‧‧‧Magnetic teeth

34, 46‧‧‧ core

35, 48‧‧‧ coil

37‧‧‧Electromagnetic unit

39‧‧‧ center pole

41‧‧‧ corner hole

43‧‧‧Thread

44‧‧‧Mold thickness adjustment mechanism

45‧‧‧ slots

47‧‧‧Y yoke

47a‧‧‧ keyway

49‧‧‧Electromagnet

51‧‧‧Adsorption Department

55‧‧‧Load detector

60‧‧‧Control Department

61‧‧‧Mold opening and closing processing department

62‧‧‧Molding Processing Department

90‧‧‧ embedded components

Claims (16)

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 be mounted And the second movable member is coupled to the first movable member and moves together with the first movable member, and the second fixed member and the second movable member constitute a clamping force for generating a clamping force by an adsorption force of the electromagnet The force generating means, at least one of the second fixing member and the second movable member constituting the mold clamping force generating means, has a laminated steel sheet in which a plurality of steel sheets are stacked, and a groove extending in a predetermined direction is formed, and is embedded in the laminated steel sheet In the insert member in the groove, the groove has a cross-sectional shape that restricts the rotational movement of the laminated steel sheet by an insert member embedded in the groove. The injection molding machine according to the first aspect of the invention, wherein the groove extends in a stacking direction of the laminated steel sheets. The injection molding machine according to the first or second aspect of the invention, wherein at least one of the second fixing member and the second movable member constituting the mold clamping force generating means is composed of a plurality of laminated steel sheets. An injection molding machine as described in claim 3, In the above, the plurality of laminated steel sheets are integrated by the insert member. The injection molding machine according to the third aspect of the invention, wherein the plurality of laminated steel sheets are integrated by joining the insert members. The injection molding machine according to any one of claims 1 to 5, wherein the insert member is fixed to a connecting rod, and the laminated steel sheet is coupled to the connecting rod via the insert member. The injection molding machine according to any one of claims 1 to 6, wherein the groove has a cross-sectional shape in which a width on the bottom side is wider than a width on the inlet side. The injection molding machine according to any one of the first aspect of the invention, wherein the groove of the laminated steel sheet is opened at an end surface of the laminated steel sheet, and is provided on an end surface of the laminated steel sheet to block the opening. Plate. The injection molding machine according to any one of claims 1 to 8, wherein the insertion member has a flow path of a temperature control fluid. Shooting as described in any one of claims 1 to 9 of the patent application The molding machine, wherein the insert member is fixed to the groove of the laminated steel sheet by shrink fitting or shrink fit. The injection molding machine according to claim 9 or 10, wherein the heat transfer member is interposed between an outer wall of the insert member and an inner wall of the groove of the laminated steel sheet. The injection molding machine according to claim 11, wherein the heat transfer member has a hardness lower than a hardness of the insert member. The injection molding machine according to any one of claims 1 to 8, wherein a flow path tube through which a temperature-regulating fluid flows is inserted into an insertion portion formed in the insertion member, and the flow path tube is cooled and contracted. Or the thermocompression fit is fixed to the aforementioned insertion portion. The injection molding machine according to claim 13, wherein the heat transfer member is interposed between the inner wall of the insertion portion and the outer wall of the flow path tube. The injection molding machine according to any one of claims 1 to 8, wherein a flow path tube through which a temperature control fluid flows is inserted in an insertion portion formed in the insertion member, and the heat transfer member is interposed therebetween The inner wall of the portion is between the outer wall of the flow tube. The injection molding machine according to any one of claims 13 to 15, wherein the heat transfer member has a hardness lower than a hardness of the flow path tube.