TWI545002B - Injection molding machine - Google Patents

Description

Injection molding machine

The present invention relates to an injection molding machine.

The injection molding machine produces a molded article by filling and solidifying the molten resin into the cavity space of the mold device (see, for example, Patent Document 1). The mold device is composed of a fixed mold and a movable mold. The fixed mold is mounted on a fixed platen, and the movable mold is mounted on the movable platen. The movable platen is separated from the fixed platen, thereby performing mold closing, mold clamping, and mold opening. When the mold is closed, a cavity space is formed between the fixed mold and the movable mold. The movable platen is guided in the mold opening and closing direction by the guide member provided on the frame.

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-101529

It has been difficult to guide the movable member such as the movable platen The guiding direction is aligned with the guiding direction of other members.

The present invention has been made in view of the above problems, and an object thereof is to provide an injection molding machine capable of aligning a guiding direction of a movable member with a guiding direction of another member.

In order to solve the above problems, an injection molding machine according to an aspect of the present invention includes: a frame; a first fixing member fixed to the frame; and a second fixing member coupled to the first fixing member via a tie bar; and a movable member And moving the mold relative to the frame when opening and closing; and guiding the guide member on the frame, and guiding the movable member in a mold opening and closing direction, the guide member extending from the movable member to the second fixing member The second fixing member is guided in the mold opening and closing direction by the guide member or the contact member that is in contact with the guide member and the frame.

According to the present invention, an injection molding machine capable of aligning a guiding direction of a movable member with a guiding direction of another member is provided.

10‧‧‧ Injection molding machine

11‧‧‧Rack

12‧‧‧Fixed platen (1st fixing member)

13‧‧‧ movable platen (movable member)

14L, 14R‧‧‧ slider

15‧‧‧ Rear platen (2nd fixing member)

16‧‧‧ tied

17L, 17R‧‧‧ Guides

30‧‧‧Molding device

32‧‧ ‧ fixed mode

33‧‧‧moving

41‧‧‧ movable platen body

42L, 42R‧‧‧ support

51‧‧‧Fixed plate body

52L, 52R‧‧‧ support

61‧‧‧ Rear platen body

62L, 62R‧‧‧ support

90‧‧‧stop mechanism

91‧‧‧ rod members

92‧‧‧Clocking members

93‧‧‧stop groove

111‧‧‧Rack

112‧‧‧Fixed platen (1st fixing member)

113‧‧‧ movable platen (first movable member)

115‧‧‧ Rear platen (2nd fixing member)

117L, 117R‧‧‧ Guides

118‧‧‧Adsorption plate (2nd movable member)

134‧‧‧electromagnet

135‧‧‧Adsorption Department

151‧‧‧Fixed plate body

152L, 152R‧‧‧ support

161‧‧‧ rear platen body

162L, 162R‧‧‧ support

171‧‧‧Adsorption plate body

172L, 172R‧‧‧ support

Fig. 1 is a view showing a state at the time of completion of mold closing of the injection molding machine according to the first embodiment of the present invention.

Fig. 2 is a view showing an injection molding machine according to a first embodiment of the present invention. A diagram of the state at the time of mold opening.

Fig. 3 is a plan view of Fig. 2, showing the operation of the stopper mechanism.

Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 1 and is a cross-sectional view of the movable platen.

Fig. 5 is a cross-sectional view taken along the line V-V of Fig. 1 and is a sectional view of the fixed platen.

Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 1 and is a sectional view of the rear plate.

Fig. 7 is a cross-sectional view showing a state in which the injection molding machine according to the second embodiment of the present invention is closed.

Fig. 8 is a cross-sectional view showing a state in which the injection molding machine according to the second embodiment of the present invention is completed at the time of mold opening.

Figure 9 is a plan view of Figure 8, which is a diagram of the operation of the stop mechanism.

Figure 10 is a cross-sectional view taken along line X-X of Figure 7, which is a cross-sectional view of a fixed platen.

Figure 11 is a cross-sectional view taken along line XI-XI of Figure 7 and is a cross-sectional view of the rear plate.

Fig. 12 is a sectional view taken along line XII-XII of Fig. 7, which is a sectional view of the adsorption plate.

In the following, the embodiments for carrying out the invention will be described with reference to the accompanying drawings, in which the same or corresponding elements are given the same or corresponding elements, and the description is omitted. And will move when closing the mold The moving direction of the pressure plate is set to the front, and the moving direction of the movable platen when the mold is opened is set to the rear. Further, the vertical direction with respect to the chassis will be described as the vertical direction. The front-rear direction, the up-and-down direction, and the left-right direction are mutually perpendicular directions. Further, the injection molding machine of the present embodiment is of a horizontal type, but may be of a vertical type.

[First Embodiment]

Fig. 1 is a view showing a state at the time of completion of mold closing of the injection molding machine according to the first embodiment of the present invention. Fig. 2 is a view showing a state at the time of completion of mold opening of the injection molding machine according to the first embodiment of the present invention. The illustration of the locking member shown in Fig. 3 is omitted in Figs. 1 and 2 . Fig. 3 is a plan view of Fig. 2, showing the operation of the stopper mechanism. Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 1 and is a cross-sectional view of the movable platen. Fig. 5 is a cross-sectional view taken along the line V-V of Fig. 1 and is a sectional view of the fixed platen. Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 1 and is a sectional view of the rear plate. The movable platen is shown superposed in Fig. 6.

As shown in FIGS. 1 and 2, the injection molding machine 10 includes a frame 11, a fixed pressure plate 12 as a first fixing member fixed to the frame 11, and a space which is disposed at a distance from the fixed platen 12. 2 The rear platen 15 of the fixing member. The fixed platen 12 and the rear platen 15 are joined by a plurality of (for example, four) tie rods 16. The axial direction of the tie rod 16 is the front-rear direction. Since the tie rod 16 is allowed to elongate at the time of mold clamping, the rear pressure plate 15 is placed to be able to advance and retreat with respect to the frame 11.

The injection molding machine 10 further includes a fixed platen 12 and A movable platen 13 as a movable member between the rear platens 15. As shown in Fig. 4 and the like, the movable platen 13 is fixed to the pair of right and left sliders 14L and 14R, and the sliders 14L and 14R are movable in the forward and backward directions along the guides 17L and 17R laid on the frame 11. Thereby, the movable platen 13 is freely contacted and separated from the fixed platen 12. The movable platen 13 has a notch at a position corresponding to the tie rod 16.

Further, the movable platen 13 of the present embodiment has a notch at a position corresponding to each of the tie bars 16, but may have a through hole instead of the notch.

The movable mold 33 is attached to a surface of the movable platen 13 that faces the fixed platen 12, and the fixed mold 32 is attached to a surface of the fixed platen 12 that faces the movable platen 13. The mold device 30 is composed of a fixed mold 32 and a movable mold 33. When the movable platen 13 is advanced, the movable mold 33 comes into contact with the fixed mold 32 to perform mold closing. When the movable platen 13 is retracted, the movable mold 33 is separated from the fixed mold 32 to perform mold opening.

The injection molding machine 10 further includes a toggle mechanism 20 disposed between the movable platen 13 and the rear platen 15, and a mold clamping motor 26 that operates the toggle mechanism 20. The mold clamping motor 26 includes a ball screw mechanism as a motion converting portion that converts a rotational motion into a linear motion, and operates the toggle mechanism 20 by advancing and retracting the drive shaft 25.

The toggle mechanism 20 has, for example, a crosshead 24 that is retractable in a direction parallel to the mold opening and closing direction, and a second toggle lever 23 that is swingably attached to the crosshead 24; the first toggle 21 is swingably mounted rearward. The pressure plate 15 and the elbow arm 22 are swingably mounted on the movable platen 13 on. The first toggle 21 and the second toggle 23, and the first toggle 21 and the elbow 22 are pin-bonded, respectively. The toggle mechanism 20 is a so-called inner 5 fulcrum double toggle mechanism.

The mold clamping device is composed of a fixed platen 12, a movable platen 13, a rear platen 15, a toggle mechanism 20, a mold clamping motor 26, and the like.

Next, the operation of the injection molding machine 10 having the above configuration will be described with reference to Figs. 1 and 2 .

When the mold opening state is completed (the state of FIG. 2), the mold clamping motor 26 is driven in the forward direction to advance the crosshead 24 as the driven member, thereby operating the toggle mechanism 20. Thus, the movable platen 13 advances, and as shown in Fig. 1, the movable mold 33 comes into contact with the fixed mold 32, and the mold closing is completed.

Then, when the mold clamping motor 26 is further driven in the positive direction, the toggle mechanism 20 generates a clamping force by the thrust generated by the mold clamping motor 26 multiplied by the toggle magnification. The mold clamping is performed by the mold clamping force. Further, a cavity space (not shown) is formed between the fixed mold 32 and the movable mold 33 in the mold clamping state. The injection cylinder fills the cavity space with the molten resin, and the filled molten resin is solidified to form a molded article.

Next, the mold clamping motor 26 is driven in the reverse direction to retract the crosshead 24, and the toggle mechanism 20 is operated, whereby the movable platen 13 is retracted to perform mold opening. Thereafter, the ejector unit ejects the molded article from the movable mold 33.

Further, the mold clamping device of the present embodiment uses the toggle mechanism 20 to generate the mold clamping force, but it is possible to mold the mold without using the toggle mechanism 20. The thrust generated by the motor 26 is directly transmitted to the movable platen 13 as a mold clamping force. Further, the thrust generated by the mold clamping cylinder may be directly transmitted to the movable platen 13 as the mold clamping force. Further, the mold can be opened and closed by a linear motor and the mold can be closed by an electromagnet, and the mode of the mold clamping device is not limited.

Next, the structure of the movable platen 13 will be described with reference to Figs. 1 and 4 .

The movable platen 13 is supported by the frame 11 via the sliders 14L, 14R and the guides 17L, 17R and the like. The movable platen 13 includes a movable platen main body 41 to which the movable mold 33 is attached, and support portions 42L and 42R that support the movable platen main body 41. The movable platen main body 41 and the support portions 42L and 42R may be integrally formed, or may be formed separately and fixed by bolts or the like. As a fixing method, welding can also be used.

The movable platen main body 41 has a mold mounting surface on which the movable mold 33 is attached. The movable mold 33 may be attached to the movable platen main body 41 such that the center line of the movable mold 33 is aligned with the center of the mold mounting surface of the movable platen main body 41.

A toggle attachment portion 45 to which the toggle mechanism 20 is attached is provided on a surface (rear end surface) of the movable platen main body 41 opposite to the mold mounting surface. The toggle attachment portion 45 is provided, for example, in a pair of upper and lower portions, and supports the elbow arms 22 so as to be swingable.

The support portions 42L and 42R are provided on the right and left sides with the movable platen main body 41 interposed therebetween. The support portions 42L and 42R support the central portion of the side surface of the movable platen main body 41 in the vertical direction. That is, the support portions 42L, 42R are in phase The side surface of the movable platen main body 41 is supported at a position where the frame 11 and the center position of the mold mounting surface of the movable platen main body 41 are substantially the same distance.

The support portions 42L and 42R support the central portion in the vertical direction of the side surface of the movable platen main body 41, whereby the movable platen main body 41 is separated from the frame 11. The support portions 42L and 42R are connected to the side surface of the movable platen main body 41 at one end, and are connected to the sliders 14L and 14R at the other end.

Moreover, the temperature of the mold device 30 is adjusted to a prescribed temperature by the temperature regulator. The heat of the movable mold 33 moves to the chassis 11 via the movable platen main body 41 and the support portions 42L, 42R and the like.

In the present embodiment, the support portions 42L and 42R support the central portion in the vertical direction of the side surface of the movable platen main body 41. Therefore, unlike the case where the lower surface of the movable platen main body 41 is supported, the temperature distribution of the movable platen main body 41 is vertically symmetrical. Thereby, the movable platen main body 41 is thermally deformed up-and-down symmetrically and is held perpendicular to the frame 11. As a result, the movable mold 33 and the fixed mold 32 are kept parallel, and the mold clamping force is not easily biased toward one side.

Further, in the present embodiment, since the support portions 42L and 42R do not restrict the lower surface of the movable platen main body 41, the movable platen main body 41 can be thermally deformed in the upward and downward directions. Thereby, the center line of the movable platen main body 41 is less likely to be vertically displaced with respect to the frame 11, and the center line of the movable mold 33 is less likely to be deviated downward from the center line of the fixed mold 32.

Next, the structure of the fixed platen 12 will be described with reference to Figs. 1 and 5.

The fixed platen 12 is supported by the frame 11. The fixed platen 12 includes a fixed platen body 51 on which the fixed mold 32 is mounted, and a fixed fixed platen body 51 support portions 52L, 52R. The fixed platen main body 51 and the support portions 52L and 52R may be integrally formed, or may be formed separately and fixed by bolts or the like. As a fixing method, welding can also be used.

The fixed platen main body 51 has a mold mounting surface on which the fixed mold 32 is mounted. The fixed mold 32 may be attached to the fixed platen main body 51 such that the center line of the fixed mold 32 is aligned with the center of the mold mounting surface of the fixed platen main body 51. A front end portion of the tie rod 16 is fixed to the fixed platen main body 51.

The support portions 52L and 52R are provided on the right and left sides with the fixed platen body 51 interposed therebetween. The support portions 52L and 52R support the central portion in the vertical direction of the side surface of the fixed platen main body 51. That is, the support portions 52L and 52R support the side surface of the fixed platen main body 51 at a position substantially the same distance from the center position of the frame mounting surface of the fixed platen main body 51 with respect to the frame 11.

The support portions 52L and 52R support the center portion in the vertical direction of the side surface of the fixed platen main body 51, whereby the fixed platen main body 51 is separated from the frame 11. The support portions 52L and 52R are connected to the side surface of the fixed platen main body 51 at one end, and are connected to the frame 11 at the other end.

Moreover, the temperature of the mold device 30 is adjusted to a prescribed temperature by the temperature regulator. The heat of the fixed mold 32 is moved to the frame 11 via the fixed platen main body 51 and the support portions 52L and 52R.

In the present embodiment, the support portions 52L and 52R support the center portion in the vertical direction of the side surface of the fixed platen main body 51. Therefore, unlike the case where the lower surface of the fixed platen main body 51 is supported, the temperature distribution of the fixed platen main body 51 is vertically symmetrical. Thereby, the fixed platen main body 51 is thermally deformed up and down symmetrically and is kept perpendicular to the frame 11. As a result, the fixed mode 32 It is kept parallel with the movable mold 33, and the mold clamping force is not easily biased to one side.

Further, in the present embodiment, since the support portions 52L and 52R do not restrict the lower surface of the fixed platen main body 51, the fixed platen main body 51 can be thermally deformed in the upper and lower directions. Thereby, the center line of the fixed platen main body 51 is less likely to be displaced upward and downward with respect to the frame 11, and the center line of the fixed mold 32 is not easily deviated downward from the center line of the movable mold 33.

Next, the structure of the rear platen 15 will be described with reference to Figs. 1 and 6 .

A toggle attachment portion 65 to which the toggle mechanism 20 is attached is provided on a surface of the rear pressure plate 15 that faces the movable platen 13. The toggle joint mounting portion 65 is provided, for example, in a pair of upper and lower portions, and supports the first toggle lever 21 so as to be swingable.

The rear platen 15 is placed on a face of the frame 11 on which the guides 17L, 17R are provided (for example, the upper surface of the frame 11). The guides 17L, 17R guide the movable platen 13 in the front-rear direction, and extend from the movable platen 13 to the rear platen 15. The rear platen 15 is guided on the side of the frame 11 on which the guides 17L, 17R are provided and the side faces of the guides 17L, 17R are guided in the front-rear direction. The pair of left and right guides 17L and 17R restrict the rear platen 15 from moving to the left and right directions on the inner side surface. Thereby, the guiding direction of the rear platen 15 can be aligned with the guiding direction of the movable platen 13. Further, not only the guide members 17L, 17R but also the rear platen 15 are guided in the front-rear direction on the frame 11, so that deformation of the guide members 17L, 17R can be suppressed when a moment is generated on the rear platen 15 at the time of mold clamping. And broken.

Further, the right and left paired guides 17L and 17R of the present embodiment restrict the rear platen 15 from moving to the left and right directions on the inner side surface, but may Similarly to the second embodiment to be described later, the rear platen 15 is restricted from moving to the left and right direction on the outer side surface.

The guides 17L, 17R are in contact with the rear platen 15, thereby restricting the rear platen 15 from moving in the left-right direction. The surface of the guides 17L and 17R that is in contact with the rear platen 15 may be a plane perpendicular to the left-right direction. When a moment with the left-right direction as the axis is generated in the rear platen 15, the bending moment is not applied to the guides 17L and 17R, and the bending and breakage of the guides 17L and 17R can be prevented. In the case where the moment in the left-right direction is generated in the rear platen 15, for example, a force of unevenness is applied to the pair of upper and lower toggle attachment portions 65 at the time of mold clamping.

Further, in the present embodiment, the rear platen 15 is guided in the front-rear direction by the guides 17L, 17R and the frame 11, but it is also possible to contact the contact member and the frame 11 by any one of the guides 17L, 17R. The rear platen 15 is guided in the front-rear direction. By the contact member contacting any one of the guides 17L, 17R, the surface of the contact member that is in contact with the rear platen 15 is parallel with respect to the guides 17L, 17R. Thereby, the guiding direction of the rear platen 15 can be aligned with the guiding direction of the movable platen 13. The contact member may be, for example, a rod shape, and may be provided in plural numbers corresponding to the plurality of guides 17L, 17R. The face of the contact member that is in contact with the rear platen 15 may be a plane perpendicular to the left-right direction.

Next, the mold thickness adjustment mechanism 80 will be described with reference to FIGS. 1 and 2 .

The mold thickness adjustment mechanism 80 is a mechanism that adjusts the distance between the fixed platen 12 and the rear platen 15 in accordance with the thickness of the mold device 30. Mold thickness The adjustment mechanism 80 is constituted by, for example, a tie rod 16 that connects the fixed pressure plate 12 and the rear pressure plate 15, and an adjustment nut 82 that is screwed to the screw portion 81 formed at one end portion of the tie rod 16. A plurality of adjustment nuts 82 are provided corresponding to the plurality of tie bars 16.

The adjusting nut 82 is rotatably mounted on the rear platen 15, and restricts relative movement of the rear platen 15 in the front-rear direction. When the adjusting nut 82 is rotated with respect to the threaded portion 81, the position of the rear platen 15 with respect to the tie rod 16 is adjusted, thereby adjusting the distance between the rear platen 15 and the fixed platen 12.

Further, the adjusting nut 82 of the present embodiment is rotatably attached to the rear platen 15, but may be rotatably attached to the fixed platen 12 and restrict relative movement of the fixed platen 12 in the front-rear direction.

Next, the stopper mechanism will be described with reference to Figs. 2 and 3.

The stopper mechanism 90 is a mechanism that restricts the movement of the movable platen 13. The stopper mechanism 90 actually restricts only the movement of the movable platen 13 in the mold closing direction. Further, the stopper mechanism 90 may restrict only the movement of the movable platen 13 in the mold opening direction, and may restrict the movement of the movable platen 13 in both directions.

The stopper mechanism 90 is provided between the movable platen 13 and the rear platen 15, and includes a rod-shaped member 91 and a locking member 92 (see Fig. 3).

The rod member 91 is fixed to the movable platen 13 and pressed backward The plate 15 extends. One end portion of the rod-shaped member 91 can be fixed to, for example, the right side support portion 42R of the movable platen 13. When the mold is opened and closed, the rod-shaped member 91 advances and retreats together with the movable platen 13. The rod member 91 has a length corresponding to the distance between the movable platen 13 and the rear platen 15 when the mold closing is completed. The distance between the movable platen 13 and the rear platen 15 at the time of closing the mold is constant irrespective of the thickness of the mold device 30, and does not change during the mold thickness adjustment.

A plurality of stopper grooves 93 are formed in the rod-shaped member 91 at intervals in the front-rear direction. As shown in Fig. 3, the wall surface of each of the stopper grooves 93 has an inclined surface 93a, a bottom surface 93b, and a locking surface 93c which are perpendicular to the front-rear direction, from the front side.

The locking member 92 is attached to the rear pressure plate 15 and is movable between an engagement position that engages with the rod-shaped member 91 and a disengaged position that is disengaged from the rod-shaped member 91. The locking member 92 is driven by a driver (not shown).

When the locking member 92 is in the engaged position, it engages with the stopper groove 93. When the locking member 92 abuts against the locking surface 93c of the stopper groove 93, the movable platen 13 cannot advance. Since the inclined surface 93a of the stopper groove 93 does not lock the locking member 92, the movable platen 13 is allowed to retreat.

On the other hand, when the locking member 92 is in the disengaged position, it is disengaged from the stopper groove 93. In this state, the movable platen 13 can move freely forward and backward.

The position of the locking member 92 is controlled by a controller or the like. When a predetermined condition set in advance is established, the locking member 92 is moved from the disengaged position to the engaged position, and if the predetermined condition is not satisfied, the locking member 92 is returned from the engaged position. position. The prescribed conditions can be arbitrary, for example, when opening and shooting When the door of the molding machine 10 is used.

Further, the arrangement of the rod-shaped member 91 and the locking member 92 may be reversed, and the rod-shaped member 91 may be fixed to the rear platen 15 and extended to the movable platen 13, and the locking member 92 may be attached to the movable platen 13. At this time, the rear platen 15 may be constituted by a rear platen main body and a support portion that supports the rear platen body, and one end portion of the rod-shaped member 91 may be fixed to the support portion. Further, the stopper mechanism 90 may be disposed between the movable platen 13 and the fixed platen 12. The distance between the movable platen 13 and the fixed platen 12 at the time of closing the mold is changed according to the thickness of the mold device 30, and therefore the length of the rod-shaped member 91 becomes longer than the amount of the mold thickness adjustment.

If the stopper mechanism 90 is operated during the movement of the movable platen 13 (for example, during the mold closing process), a force F1 (refer to Fig. 3) for restricting the movement of the movable platen 13 is generated. This force F1 is generated in the axial direction of the rod member 91.

As shown in Figs. 1, 3, and 6, the rod-shaped member 91 is disposed in parallel with the right side guide 17R, and is viewed from a direction (e.g., upward) perpendicular to the surface on which the right side guide 17R is provided on the chassis 11. It is located at substantially the same position as the position of the right guide 17R.

Thereby, the force F1 that restricts the movement of the movable platen 13 acts in parallel with the right side guide 17R, and is generated at a position substantially the same as the position of the right side guide 17R as viewed from above. At this time, the force along the right side guide 17R acts on the right slider 14R. The right slider 14R is freely movable along the right guide 17R, so that no bending moment is applied to the right guide 17R, and a bending moment is not applied to the left guide 17L. Thereby, it is possible to suppress bending and breakage of the left and right guides 17L and 17R. This effect is remarkable when the one end portion of the rod-shaped member 91 is fixed to the right side support portion 42R of the movable platen 13. The one end portion of the rod-shaped member 91 is fixed to the free end portion of the bracket extending to the right in the middle of the movable platen main body 41, and the force F1 is applied to the movable platen 13 when viewed from above. The position is located at substantially the same position as the position of the right guide 17R.

Further, the rod-shaped member 91 is provided in parallel with the left side guide 17L, and may be located at substantially the same position as the position of the left side guide 17L when viewed in a direction perpendicular to the surface on which the left side guide 17L of the frame 11 is provided. Further, the rod members 91 may be provided in pairs.

Further, as described above, the rod-shaped member 91 is disposed in parallel with the right side guide 17R, and is located at a position to the right side guide 17R when viewed from a direction (for example, an upper side) perpendicular to the surface on which the right side guide 17R of the frame 11 is disposed. Roughly the same position. Therefore, the rod-shaped member 91 can be disposed with respect to the right side guide 17R, and the guiding direction of the rod-shaped member 91 can be aligned with the guiding direction of the movable platen 13. The rod-shaped member 91 is guided forward and backward by a member (not shown) attached to the rear platen 15.

[Second Embodiment]

Fig. 7 is a view showing a state at the time of completion of mold closing of the injection molding machine according to the second embodiment of the present invention. Fig. 8 is a view showing a state at the time of completion of mold opening of the injection molding machine according to the second embodiment of the present invention. In the seventh and eighth drawings, the illustration of the locking member shown in Fig. 9 is omitted. Figure 9 is a plan view of Figure 8, which is a diagram of the operation of the stop mechanism. Figure 10 is along the 7th The cross-sectional view of the X-X line of the figure is a sectional view of the fixed platen. Figure 11 is a cross-sectional view taken along line XI-XI of Figure 7 and is a cross-sectional view of the rear plate. Fig. 12 is a sectional view taken along line XII-XII of Fig. 7, which is a sectional view of the adsorption plate.

The injection molding machine 110 includes a frame 111, a rear platen 115 as a first fixing member fixed to the frame 111, and a fixed platen 112 as a second fixing member disposed at a distance from the rear platen 115. The rear platen 115 and the fixed platen 112 are joined by a plurality of (for example, four) tie rods 116. The axial direction of the tie rod 116 is the front-rear direction. Since the tie rod 116 is allowed to elongate when the mold is closed, the fixed pressure plate 112 is placed to be able to advance and retreat with respect to the frame 111.

The injection molding machine 110 further includes a movable platen 113 as a first movable member disposed between the fixed platen 112 and the rear platen 115. The movable platen 113 is fixed to the left and right paired sliders 114, and the sliders 114 are retractable along the guides 117L and 117R laid on the frame 111. Thereby, the movable platen 113 is freely contacted with respect to the fixed platen 112. The movable platen 113 has a notch at a position corresponding to the tie rod 116.

Further, the movable platen 113 of the present embodiment has a notch at a position corresponding to each of the tie bars 116, but may have a through hole instead of the notch.

The movable mold 133 is attached to a surface of the movable platen 113 facing the fixed platen 112, and the fixed mold 132 is attached to a surface of the fixed platen 112 facing the movable platen 113. The mold device 130 is composed of a fixed mold 132 and a movable mold 133. When the movable platen 113 is advanced, the movable mold 133 and the fixed mold 132 Close the mold by contact. When the movable platen 113 is retracted, the movable mold 133 is separated from the stationary mold 132 to perform mold opening.

The injection molding machine 110 further includes an adsorption plate 118 as a second movable member that moves forward and backward together with the movable platen 113, and a rod 119 that connects the movable platen 113 and the adsorption plate 118 with a gap therebetween. After being disposed between the adsorption plate 118 and the movable platen 113, a hole through which the rod 119 is inserted is formed in the pressure plate 115.

The suction plate 118 is fixed to the slide base Sb, and the slide base Sb is retractable along the guides 117L, 117R. Thereby, the adsorption plate 118 can move forward and backward more than the rear pressure plate 115.

The injection molding machine 110 further includes a linear motor 120 as a mold opening and closing drive unit that moves the movable platen 113 forward and backward. The linear motor 120 is disposed, for example, between the suction plate 118 that advances and retracts together with the movable platen 113 and the frame 111. In addition, the linear motor 120 may also be disposed between the movable platen 113 and the frame 111.

The linear motor 120 includes a fixing member 121 and a movable member 122. The fixing member 121 is formed on the frame 111, and the movable member 122 is formed at the lower end of the sliding base Sb. When a predetermined current is supplied to the coil 123 of the movable member 122, the movable member 122 can advance and retreat by the interaction of the magnetic field formed by the current flowing through the coil 123 and the magnetic field formed by the permanent magnet of the fixing member 121. Accordingly, the adsorption plate 118 and the movable platen 113 advance and retreat to perform mold closing and mold opening.

Further, in the present embodiment, the permanent magnet is disposed on the fixing member 121, and the coil 123 is disposed on the movable member 122, but may be The coil is disposed on the fixing member, and the permanent magnet is disposed on the movable member. At this time, since the coil does not move with the driving of the linear motor 120, the wiring for supplying electric power to the coil can be easily performed.

Further, instead of the linear motor 120, a rotary motor and a ball screw mechanism that converts the rotational motion of the rotary motor into a linear motion or a fluid pressure cylinder (for example, a hydraulic cylinder) may be used as the mold opening/closing drive unit.

The electromagnet 134 formed on the rear platen 115 and the adsorption portion 135 formed on the adsorption plate 118 constitute a mold clamping force generating mechanism that generates a mold clamping force. When the electromagnet 134 is energized to drive the electromagnet 134, an adsorption force is generated between the electromagnet 134 and the adsorption portion 135, and a mold clamping force is generated. When the energization of the electromagnet 134 is stopped, the adsorption force disappears and the mold clamping force disappears.

Further, in the present embodiment, the electromagnet 134 and the rear platen 115 are formed separately, and the adsorption portion 135 and the adsorption plate 118 are formed separately. However, the electromagnet may be used as a part of the rear platen 115, and the adsorption portion may be used as the adsorption portion. A portion of the adsorption plate 118 is formed. Further, the arrangement of the electromagnet and the adsorption portion may be reversed. For example, the electromagnet 134 may be provided on the side of the adsorption plate 118, and the adsorption portion 135 may be provided on the side of the rear platen 115.

Next, the operation of the injection molding machine 110 having the above configuration will be described with reference to Figs. 7 and 8.

The linear motor 120 is driven to advance the movable platen 113 in a state where the mold opening is completed (the state of Fig. 8). Thus, as shown in Fig. 7, the movable mold 133 abuts against the fixed mold 132, and the mold closing is completed. At the moment when the mold closing is completed, between the rear platen 115 and the adsorption plate 118, that is, at the electromagnet A predetermined gap δ is formed between the 134 and the adsorption portion 135. In addition, the force required to close the mold is sufficiently small compared to the mold clamping force.

After the mold closing is completed, the electromagnet 134 is driven to generate an adsorption force between the electromagnet 134 and the adsorption portion 135 with respect to the predetermined gap δ. By the suction force, a mold clamping force is generated between the movable platen 113 and the fixed platen 112. Further, a cavity space (not shown) is formed between the fixed mold 132 and the movable mold 133 in the mold clamping state. The injection cylinder fills the cavity space with the molten resin, and the filled molten resin is solidified to form a molded article.

After the mold clamping is completed, the linear motor 120 is driven to retract the movable platen 113. The movable mold 133 is retracted to perform mold opening. After the mold is opened, an ejector device (not shown) ejects the molded article from the movable mold 133.

Next, the structure of the fixed platen 112 will be described with reference to FIGS. 7 and 10. The fixed platen 112 is different from the fixed platen 12 shown in FIGS. 1 and 5 in that it is not fixed to the frame 111 but is placed to be movable on the frame 111. The main points are different. Further, since the movable platen 113 has the same configuration as the movable platen 13 shown in Figs. 1 and 4, description thereof will be omitted.

The fixed platen 112 is supported by the frame 111. The fixed platen 112 includes a fixed platen body 151 on which the fixed mold 132 is attached, and support portions 152L, 152R that support the fixed platen body 151. The support portions 152L and 152R are provided on the right and left sides with the fixed platen body 151 interposed therebetween. The support portions 152L and 152R support the central portion in the vertical direction of the side surface of the fixed platen body 151. That is, the support portions 152L, 152R are supported at substantially the same distance from the center position of the mold mounting surface of the fixed platen main body 151 with respect to the frame 111. The side surface of the platen body 151 is fixed.

The fixed platen 112 is placed on a surface of the frame 111 on which the guides 117L, 117R are provided (for example, the upper surface of the frame 111). The guides 117L, 117R guide the movable platen 113 and the suction plate 118 in the front-rear direction, and are extended to the fixed platen 112. The side of the fixed platen 112 on which the guides 117L, 117R are provided and the side faces of the guides 117L, 117R are guided in the front-rear direction. The pair of left and right guides 117L and 117R restrict the movement of the fixed platen 112 in the left-right direction on the outer side surface. Thereby, the guiding direction of the fixed platen 112 can be aligned with the guiding direction of the movable platen 113 and the suction plate 118. Further, not only the guide members 117L, 117R but also the fixed platen 112 are guided in the front-rear direction on the frame 111, so that when a moment is generated on the fixed platen 112 during mold clamping, deformation of the guide members 117L, 117R can be suppressed and damaged.

In addition, the right and left paired guides 117L and 117R restrict the movement of the fixed pressure plate 112 in the left-right direction on the outer side surface. However, the fixed pressure plate 112 may be restricted from moving in the left-right direction on the inner side surface as in the first embodiment.

The guides 117L, 117R are in contact with the fixed platen 112, thereby restricting the movement of the fixed platen 112 in the left-right direction. The faces of the guides 117L, 117R that are in contact with the fixed platen 112 may be planes that are perpendicular to the left-right direction. When a moment in the left-right direction is generated on the fixed platen 112, a bending moment is not applied to the guides 117L and 117R, and bending and breakage of the guides 117L and 117R can be prevented. As a case where a torque in the left-right direction is generated on the fixed platen 112, for example, a pair of upper and lower tie rods can be cited. The balance adjustment of 116 is not sufficient.

Further, in the present embodiment, the fixed platen 112 is guided in the front-rear direction by the guide members 117L, 117R and the frame 111, but the contact member and the frame 111 which are in contact with any one of the guide members 117L, 117R can also be used. The fixed platen 112 is guided in the front-rear direction. The contact surface of the contact member in contact with the fixed platen 112 is parallel with respect to the guide members 117L, 117R by contact of any one of the guide members 117L, 117R. Thereby, the guiding direction of the fixed platen 112 can be aligned with the guiding direction of the movable platen 113 and the suction plate 118. The contact member may be, for example, a rod shape, and may be provided in plural numbers corresponding to the plurality of guides 117L, 117R. The face of the contact member that is in contact with the fixed platen 112 may be a plane that is perpendicular to the left-right direction.

Next, the structure of the rear platen 115 will be described with reference to Figs. 7 and 11 .

The rear platen 115 is supported by the frame 111. The rear platen 115 includes a rear platen body 161 and support portions 162L, 162R that support the rear platen body 161. The rear platen main body 161 and the support portions 162L and 162R may be integrally formed, or may be formed separately and fixed by bolts or the like. As a fixing method, welding can also be used.

A groove 137 for accommodating the coil 136 of the electromagnet 134 is formed on the suction surface (rear end surface) of the rear platen main body 161. The groove 137 is formed to surround the rod 119. A magnetic core 138 is formed on the inner side of the groove 137. A coil 136 is wound around the magnetic core 138. A yoke 139 is formed in a portion of the rear platen main body 161 excluding the magnetic core 138. If the electromagnet 134 When the electromagnet 134 is driven by energization, the electromagnet 134 adsorbs the adsorption portion 135 to generate a mold clamping force.

The support portions 162L and 162R are disposed on the left and right sides with the rear platen body 161 interposed therebetween. The support portions 162L and 162R support the central portion of the side surface of the rear platen body 161 in the vertical direction. That is, the support portions 162L and 162R support the side surface of the rear platen body 161 at a position substantially the same distance from the center position of the suction surface of the frame plate 111 and the rear platen body 161.

The support portions 162L and 162R support the central portion of the side surface of the rear platen body 161 in the vertical direction, whereby the rear platen body 161 is separated from the frame 111. The support portions 162L and 162R are connected to the side surface of the rear platen body 161 at one end portion, and are connected to the frame 111 at the other end portion.

Further, when the electromagnet 134 is driven, the rear platen main body 161 is heated by the Joule heat of the electromagnet 134. The heat of the rear platen body 161 is moved to the frame 111 via the support portions 162L, 162R.

In the present embodiment, the support portions 162L and 162R support the central portion in the vertical direction of the side surface of the rear platen body 161. Therefore, unlike the case where the lower surface of the rear platen body 161 is supported, the temperature distribution of the rear platen main body 161 is vertically symmetrical. Thereby, the rear platen main body 161 is thermally deformed up and down symmetrically and is kept perpendicular to the frame 111. As a result, the rear platen main body 161 and the suction plate main body 171 are parallel, and the suction force is less likely to be biased toward one side.

Further, in the present embodiment, since the support portions 162L and 162R do not restrict the lower surface of the rear platen body 161, the rear platen body 161 can be thermally deformed in the upper and lower directions. Thereby, the center line of the rear platen main body 161 is not easily deviated upward and downward with respect to the frame 111, and the center of the rear platen main body 161 The line and the center line of the suction plate main body 171 are not easily deviated up and down.

Next, the structure of the adsorption plate 118 will be described with reference to FIGS. 7 and 12.

The suction plate 118 is supported by the frame 111 via the slide base Sb and the guides 117L, 117R and the like. The adsorption plate 118 includes an adsorption plate main body 171 and support portions 172L and 172R that support the adsorption plate main body 171. The suction plate main body 171 and the support portions 172L and 172R may be integrally formed, or may be formed separately and fixed by bolts or the like. As a fixing method, welding can also be used.

On the adsorption surface (front end surface) of the adsorption plate main body 171, the adsorption portion 135 which is adsorbed by the electromagnet 134 is formed at a predetermined depth from the adsorption surface. The adsorption portion 135 is formed at a portion surrounding the rod 119.

The support portions 172L and 172R are provided on the right and left sides with the suction plate main body 171 interposed therebetween. The support portions 172L and 172R support the central portion of the side surface of the suction plate main body 171 in the vertical direction. In other words, the support portions 172L and 172R support the side surface of the suction plate main body 171 at a position substantially the same distance from the center position of the suction surface of the frame 111 and the suction plate main body 171.

The support portions 172L and 172R support the central portion of the side surface of the suction plate main body 171 in the vertical direction, thereby separating the suction plate main body 171 from the slide base Sb and the frame 111. The support portions 172L and 172R are connected to the side surface of the suction plate main body 171 at one end portion, and are connected to the slide base Sb at the other end portion.

Further, if the magnetic flux of the electromagnet 134 changes at the start of the mold clamping and at the end of the mold clamping, the eddy current flows through the adsorption portion 135. The suction plate main body 171 is sucked, whereby the adsorption plate main body 171 generates heat. The heat of the suction plate main body 171 moves to the frame 111 via the support portions 172L, 172R, and the like.

In the present embodiment, the support portions 172L and 172R support the central portion in the vertical direction of the side surface of the suction plate main body 171. Therefore, unlike the case where the lower surface of the adsorption plate main body 171 is supported, the temperature distribution of the adsorption plate main body 171 is vertically symmetrical. Thereby, the suction plate main body 171 is thermally deformed up and down symmetrically, and is held perpendicular to the frame 111. As a result, the adsorption plate main body 171 and the rear platen main body 161 are kept in parallel, and the adsorption force is not easily biased toward one side.

Further, in the present embodiment, since the support portions 172L and 172R do not restrict the lower surface of the suction plate main body 171, the suction plate main body 171 can be thermally deformed in the upward and downward directions. Thereby, the center line of the suction plate main body 171 is less likely to be vertically displaced from the frame 111, and the center line of the rear platen main body 161 and the center line of the suction plate main body 171 are less likely to be vertically displaced.

Next, the mold thickness adjustment mechanism 180 will be described with reference to FIGS. 7 and 8.

The mold thickness adjustment mechanism 180 is a mechanism that adjusts the distance between the movable platen 113 and the suction plate 118 in accordance with the thickness of the mold device 130. The mold thickness adjustment mechanism 180 is constituted by, for example, a rod 119 that connects the movable platen 113 and the suction plate 118, and an adjustment nut 182 that is screwed to a screw portion 181 (see FIG. 9) formed at one end portion of the rod 119.

The adjusting nut 182 is rotatably mounted on the suction plate 118, and restricts relative movement to the front-rear direction of the suction plate 118. If When the adjustment nut 182 is rotated with respect to the threaded portion 181, the position of the suction plate 118 with respect to the rod 119 is adjusted, thereby adjusting the distance between the movable platen 113 and the suction plate 118.

Further, the adjustment nut 182 of the present embodiment is rotatably attached to the suction plate 118, but may be rotatably attached to the movable platen 113 and restrict relative movement of the movable platen 113 in the front-rear direction.

Next, the stopper mechanism will be described with reference to Figs. 8 and 9.

The stopper mechanism 190 is a mechanism that restricts the movement of the movable platen 113 and the suction plate 118. The stopper mechanism 190 actually restricts only the movement of the movable platen 113 and the suction plate 118 in the mold closing direction. Further, the stopper mechanism 190 may restrict only the movement of the movable platen 113 and the suction plate 118 in the mold opening direction, and may restrict the movement of the movable platen 113 and the suction plate 118 in both directions.

The stopper mechanism 190 is disposed between the suction plate 118 and the rear platen 115, and includes a rod-shaped member 191 and a locking member 192 (refer to Fig. 9).

The rod member 191 is fixed to the adsorption plate 118 and extends toward the rear platen 115. One end portion of the rod-shaped member 191 may be fixed to the right side support portion 172R of the suction plate 118. When the mold is opened and closed, the rod-shaped member 191 advances and retreats together with the adsorption plate 118 and the movable platen 113. The rod member 191 has a length corresponding to the distance between the adsorption plate 118 and the rear platen 115 at the time of completion of the mold opening. The distance between the adsorption plate 118 and the rear pressure plate 115 when the mold opening is completed It is constant irrespective of the thickness of the mold device 130 and does not change during the mold thickness adjustment.

A plurality of stopper grooves 193 are formed in the rod-shaped member 191 at intervals in the front-rear direction. As shown in Fig. 9, the wall surface of each of the stopper grooves 193 has an inclined surface 193a, a bottom surface 193b, and a locking surface 193c that are perpendicular to the front-rear direction, from the front side.

The locking member 192 is attached to the rear platen 115 and is movable between an engagement position that engages with the rod-shaped member 191 and a disengaged position that is disengaged from the rod-shaped member 191. The locking member 192 is driven by a driver (not shown).

When the locking member 192 is in the engaged position, it engages with the stopper groove 193. When the locking member 192 abuts against the locking surface 193c of the stopper groove 193, the suction plate 118 and the movable platen 113 cannot advance. The inclined surface 193a of the stopper groove 193 does not lock the locking member 192, and thus the suction plate 118 and the movable platen 113 are allowed to retreat.

On the other hand, when the locking member 192 is in the disengaged position, it is disengaged from the stopper groove 193. In this state, the suction plate 118 and the movable platen 113 can move freely forward and backward.

The position of the locking member 192 is controlled by a controller or the like. When a predetermined condition set in advance is established, the locking member 192 is moved from the disengaged position to the engaged position, and if the predetermined condition is not satisfied, the locking member 192 is returned from the engaged position. position. The prescribed condition may be arbitrary, for example, when the door of the injection molding machine 110 is opened.

In addition, the arrangement of the rod member 191 and the locking member 192 Conversely, the rod member 191 may be fixed to the rear platen 115 and extended to the suction plate 118, and the locking member 192 is attached to the adsorption plate 118. At this time, one end portion of the rod-shaped member 191 may be fixed to any one of the support portions 162L and 162R of the rear platen 115. Further, the stopper mechanism 190 may be disposed between the movable platen 113 and the rear platen 115 or between the movable platen 113 and the fixed platen 112. The distance between them varies depending on the thickness of the mold device 130, and therefore the length of the rod-shaped member 191 becomes longer than the amount of mold thickness adjustment.

If the stopper mechanism 190 operates during the movement of the movable platen 113 and the suction plate 118 (for example, during the mold closing process), a force F2 that restricts the movement of the movable platen 113 and the suction plate 118 is generated (refer to Fig. 9). This force F2 is generated in the axial direction of the rod member 191.

As shown in FIGS. 9 and 11, the rod-shaped member 191 is disposed in parallel with the right side guide 117R, and is located in a direction perpendicular to the surface of the frame 111 on which the right side guide 117R is disposed (for example, above). The position of the right guide 117R is substantially the same.

Thereby, the force F2 that restricts the movement of the movable platen 113 and the suction plate 118 acts in parallel with the right guide 117R, and is generated at substantially the same position as the position of the right guide 117R when viewed from above. At this time, the force along the right side guide 117R acts on the slider base Sb. The slider base Sb is freely movable along the right guide 117R, so that no bending moment is applied to the right guide 117R, and a bending moment is not applied to the left guide 117L. Thereby, it is possible to suppress bending and breakage of the left and right guides 117L and 117R. This effect is on the right side of the adsorption plate 118 When the one end portion of the rod-shaped member 191 is fixed to the support portion 172R, it is remarkable. The force F2 applied to the adsorption plate 118 when viewed from above is different from the case where one end portion of the rod-shaped member 191 is fixed to the free end portion of the holder extending rightward from the suction plate main body 171 rearward. The position is located at substantially the same position as the position of the right guide 117R.

Further, the rod-shaped member 191 is disposed in parallel with the left side guide 117L, and may be located at substantially the same position as the position of the left side guide 117L when viewed from a direction perpendicular to the surface on which the left side guide 117L of the frame 111 is provided. Further, the rod members 191 may be provided in pairs.

Further, as described above, the rod-shaped member 191 is disposed in parallel with the right side guide 117R, and is located at a position with respect to the right side guide 117R when viewed from a direction (for example, upward) perpendicular to the surface on which the right side guide 117R of the frame 111 is disposed. Roughly the same position. Therefore, the rod-shaped member 191 can be disposed with respect to the right side guide 117R, and the guiding direction of the rod-shaped member 191 can be aligned with the guiding direction of the movable platen 113 and the suction plate 118. The rod-shaped member 191 is guided forward and backward by a member (not shown) attached to the rear platen 115.

In the above, the embodiment of the injection molding machine has been described. However, the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope of the gist of the invention.

For example, the support portion of the movable platen of the above embodiment is constituted by a horizontal portion extending horizontally from the movable platen body and a vertical portion extending downward from the front end of the horizontal portion, but the shape of the support portion may be various. Not only the movable platen, but also in the fixed platen, the rear platen, the adsorption plate, etc. with.

Further, although the support portion of the movable platen of the above embodiment supports the side surface of the movable platen main body, the support position is not particularly limited, and may be, for example, a lower surface of the movable platen main body or a rear end surface of the movable platen main body. Not only the movable platen, but also the fixed platen, the rear platen, the adsorption plate, and the like.

Further, the second fixing member (the rear platen in the first embodiment or the fixed platen in the second embodiment) of the above embodiment is placed on the frame, but may be fixed to the slider as long as the slider is along The guides laid on the rack move freely forward and backward. The support portion of the main body that supports the second fixing member is fixed to the slider, and one end portion of the rod-shaped member of the stopper mechanism may be fixed to the support portion.

10‧‧‧ Injection molding machine

11‧‧‧Rack

12‧‧‧Fixed platen (1st fixing member)

13‧‧‧ movable platen (movable member)

14L, 14R‧‧‧ slider

15‧‧‧ Rear platen (2nd fixing member)

16‧‧‧ tied

17L, 17R‧‧‧ Guides

21‧‧‧1st toggle

22‧‧‧Elbow arm

26‧‧‧Moulding motor

32‧‧ ‧ fixed mode

33‧‧‧moving

41‧‧‧ movable platen body

42L, 42R‧‧‧ support

45‧‧‧Toggles installation

51‧‧‧Fixed plate body

52L, 52R‧‧‧ support

65‧‧‧Toggles installation

80‧‧‧Mold thickness adjustment mechanism

81‧‧‧Threading Department

82‧‧‧Adjustment nut

90‧‧‧stop mechanism

91‧‧‧ rod members

92‧‧‧Clocking members

93‧‧‧stop groove

93a‧‧‧ sloped surface

93b‧‧‧ bottom

93c‧‧‧ card stop

Claims (4)

An injection molding machine comprising: a frame; a first fixing member fixed to the frame; a second fixing member coupled to the first fixing member via a tie bar; and a movable member movable relative to the frame when the mold is opened and closed And a guide member disposed on the frame and guiding the movable member in a mold opening and closing direction, the guide member extending from the movable member to the second fixing member, being contacted by the guide member or the guide member The contact member and the frame guide the second fixing member in the mold opening and closing direction, and the rod member is fixed to the first fixing member or the second fixing member and the movable member. And extending to any other; and the locking member is mounted on the other one, and is movable between an engagement position that engages with the rod-shaped member and a disengaged position that is disengaged from the rod-shaped member, when When the locking member is located at the engaging position, the movement of the movable member is restricted, and the rod-shaped member is disposed in parallel with the guiding member, and is suspended from the guide member provided with respect to the frame When viewed in a straight direction, it is located at substantially the same position as the position of the aforementioned guide. The injection molding machine of claim 1, wherein Among the first fixing member, the second fixing member, and the movable member, the member to which the rod-shaped member is fixed includes a main body and a support portion that supports the main body, and one end portion of the rod-shaped member is fixed to the support portion. An injection molding machine comprising: a frame; a first fixing member fixed to the frame; a second fixing member coupled to the first fixing member via a tie bar; and a movable member movable relative to the frame when the mold is opened and closed a guide member disposed on the frame and guiding the movable member in a mold opening and closing direction; the rod member being fixed to the first fixing member or the second fixing member and the movable member And extending to any other; and the locking member is mounted on the other one, and is movable between an engagement position that engages with the rod-shaped member and a disengaged position that is disengaged from the rod-shaped member, when the card When the stopping member is located at the engaging position, the movement of the movable member is restricted, and the rod-shaped member is disposed in parallel with the guide member and is located when viewed from a direction perpendicular to a surface of the frame on which the guide member is disposed. The positions of the aforementioned guides are substantially the same. The injection molding machine according to the third aspect of the invention, wherein the member of the first fixing member, the second fixing member, and the movable member to which the rod member is fixed includes a main body and supports the main body The support portion has one end portion of the rod-shaped member fixed to the support portion.