Intermediate mold, mold apparatus and injection molder

Abstract

To utilize a mold open / close operation to switch between: a state facing one of a stationary side mold and a movable side mold to conduct a mold open / close operation; and a state movable while rotating between a location opposing the stationary side mold and a location opposing the movable side mold, from among states of a rotary die.SOLUTION: An intermediate mold 10 arranged between a stationary side mold and a movable side mold in a mold apparatus of an injection molder includes: a mold part 12 configured to conduct a mold open / close operation to an opposing mold from a stationary side mold and a movable side mold; a guide bar 111 penetrating the mold part 12 and configured to guide the mold open / close operation; and a rotation frame body 11 having a rotational axis and configured to rotate together with the guide bar 111 and the mold part 12 in a state bonded to the guide bar 111. The mold part 12 is temporarily held at a tip part of the guide bar 111 and temporarily held at an opposing mold.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an intermediate mold, a mold apparatus, and an injection molding machine. [Background technology]

[0002] As a mold device constituting an injection molding machine, there is a mold device in which an intermediate mold is disposed between a fixed mold and a movable mold. In addition, as the intermediate mold, there is a mold device having a rotating mold that moves while rotating between a position facing the fixed mold and a position facing the movable mold, and alternately performs mold opening and closing operations at each position (for example, Patent Document 1). Such a rotating mold is controlled so that a state in which it faces either the fixed mold or the movable mold to perform mold opening and closing operations, and a state in which it can move while rotating between each position are repeated alternately. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4283181 Summary of the Invention [Problem to be solved by the invention]

[0004] However, it was not possible to switch the state of the rotating mold between a state in which it faces either the fixed mold or the movable mold to perform the mold opening and closing operation, and a state in which it can move while rotating between a position facing the fixed mold and a position facing the movable mold, by using the mold opening and closing operation.

[0005] The object of the present invention is to switch the state of a rotating mold between a state in which it faces either a fixed mold or a movable mold to perform mold opening and closing operations, and a state in which it can move while rotating between a position facing the fixed mold and a position facing the movable mold, by using the mold opening and closing operations. [Means for solving the problem]

[0006] The present invention, which was completed with this objective in mind, is an intermediate mold arranged between a fixed side mold and a movable side mold in a mold device of an injection molding machine, and comprises a mold section that performs mold opening and closing operations with an opposing mold that faces the fixed side mold and the movable side mold, a guide bar that penetrates the mold section and guides the mold opening and closing operations, and a rotating frame that has a rotation axis and rotates together with the guide bar and the mold section while joined to the guide bar, characterized in that the mold section is temporarily held by the tip of the guide bar and temporarily held by the opposing mold. Here, the mold part may be grasped by the tip of the guide bar when it rotates between positions facing the opposing mold and when it is opened with the opposing mold, and may be grasped by the opposing mold when it is closed with the opposing mold. In addition, the tip of the guide bar and the mold portion may have a first mechanism for gripping the mold portion with the guide bar, and a second mechanism for gripping the mold portion with the opposing mold. In addition, the first mechanism may release the mold part when it is gripped by the opposing mold, and cause the guide bar to grip the mold part when it is released from the opposing mold. The first mechanism may also have a locking member that locks the mold portion against sliding in the axial direction of the guide bar. In addition, the locking member may have a first locking portion that locks the mold portion against sliding toward the axial tip side of the guide bar, and a second locking portion that locks the mold portion against sliding toward the rotating frame side in the axial direction of the guide bar. The mold part may also have a locked member that is locked to the first locking portion during the rotational movement and when the mold is opened, and is released from the first locking portion by being pressed and moved when the mold is opened. The locked member may be released from the first locking portion by being pressed by a pressing member provided on the opposing mold and moved. The second mechanism may also have a movable hook portion that is movable when pressed, and a pressing member that presses the movable hook portion, and engages the movable hook portion with a fixed hook portion fixed to the opposing mold. In addition, when the movable hook portion is moved by being pressed by a pressing member provided at the tip of the guide bar during the mold opening, the movable hook portion may be released from its engagement with the fixed hook portion. The locking member of the first mechanism may be a member that is integrally formed with the pressing member of the second mechanism. Furthermore, each of the mold part and the guide bar may be configured to have a size and shape that allows the rotational movement and the mold opening and closing operation of the mold part. The present invention also relates to a mold device for an injection molding machine, comprising: an intermediate mold arranged between a fixed side mold and a movable side mold; a mold section which performs mold opening and closing operations with an opposing mold which faces the fixed side mold and the movable side mold; a guide bar which penetrates the mold section and guides the mold opening and closing operations; and a rotating frame which has a rotation axis and is joined to the guide bar and rotates together with the guide bar and the mold section, wherein the mold section is temporarily held by the tip of the guide bar and temporarily held by the opposing mold. The present invention also relates to an injection molding machine equipped with a mold device consisting of a fixed side mold, a movable side mold, and an intermediate mold arranged between the fixed side mold and the movable side mold, wherein the intermediate mold comprises a mold section that performs mold opening and closing operations with an opposing mold that faces the fixed side mold and the movable side mold, a guide bar that penetrates the mold section and guides the mold opening and closing operations, and a rotating frame that has a rotation axis and rotates together with the guide bar and the mold section while joined to the guide bar, and wherein the mold section is temporarily held by the tip of the guide bar and temporarily held by the opposing mold. Effect of the Invention

[0007] According to the present invention, the state of the rotating mold can be switched between a state in which it faces either the fixed side mold or the movable side mold to perform mold opening and closing operations, and a state in which it can move while rotating between a position facing the fixed side mold and a position facing the movable side mold, by the mold opening and closing operation. [Brief description of the drawings]

[0008] [Figure 1] 1A is a perspective view showing an example of the external configuration of an injection molding machine according to the present embodiment, and FIG. 1B is a cross-sectional perspective view showing an example of the external configuration of a part of a mold device mounted on the injection molding machine of FIG. [Diagram 2] 5A to 5C are diagrams illustrating the configuration and operation of a cam lock mechanism. [Diagram 3] 5A to 5C are diagrams illustrating the configuration and operation of a cam lock mechanism. [Figure 4] 5A to 5C are diagrams illustrating the configuration and operation of a cam lock mechanism. [Diagram 5] 1 is a diagram showing the state when the mold part in the first state is located on the top side in the top-bottom direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. (Configuration of injection molding machine) Fig. 1(A) is a perspective view showing an example of the external configuration of an injection molding machine 100 according to the present embodiment. Fig. 1(B) is a cross-sectional perspective view showing an example of the external configuration of a part of a mold device 1 mounted on the injection molding machine 100 of Fig. 1(A).

[0010] The injection molding machine 100 shown in Fig. 1(A) is a molding machine used for injection blow molding. Injection blow molding is a molding technique that performs injection molding and blow molding in two stages. In injection blow molding, a preform that serves as the prototype of the product is first molded in injection molding. Then, in blow molding, air is pumped into the preform to expand it, thereby molding the product.

[0011] The injection molding machine 100 is equipped with a mold device 1 shown in FIG. 1(B). The mold device 1 is a mold device that enables injection blow molding, and is configured to include an intermediate mold 10, a fixed side mold 30, and a movable side mold 20. The intermediate mold 10 is a rotating mold disposed between the fixed side mold 30 and the movable side mold 20. The intermediate mold 10 performs a mold closing operation to close the mold and a mold opening operation to open the mold at a position facing each of the fixed side mold 30 and the movable side mold 20. The mold device 1 performs injection molding by the mold closing operation between the intermediate mold 10 and the fixed side mold 30, and performs blow molding by the mold closing operation between the intermediate mold 10 and the movable side mold 20.

[0012] As shown in FIG. 1(B), the intermediate mold 10 has a rotary frame 11, a mold section 12, a support frame 13, and a top member 14. The rotary frame 11 is a metal frame that rotates on a rotary shaft 200. Although not shown, a shaft that rotates on the rotary shaft 200 is attached to the rotary frame 11. The shaft is supported by a bearing section of the support frame 13 in a state where it is attached to the third side and the fourth side of the rotary frame 11 in the rotation axis direction, or in a state where it penetrates the rotary frame 11. A drive section that rotates the shaft is connected to at least one of the third side and the fourth side of the shaft.

[0013] A guide bar 111 that guides the mold opening and closing operation of the mold section 12 is fixed to the rotating frame 11. The guide bar 111 is a rod-shaped metal member that slidably passes through the mold section 12. A metal block member 122 is joined to the tip of the guide bar 111. In FIG. 1, the block member 122 locks the mold section 12 so that it does not slide on the guide bar 111. In this state, the mold section 12 is held by the tip of the guide bar 111.

[0014] The mold sections 12 are plates of a mold, and two mold sections 12 are detachably attached to the rotary frame 11 via guide bars 111. When the rotary frame 11 rotates about the rotation shaft 200, the mold sections 12 rotate together therewith, and move while rotating between a position where injection molding is performed by closing the mold with the fixed mold 30 and a position where blow molding is performed by closing the mold with the movable mold 20.

[0015] The mold section 12 has a sliding mechanism 201 constituting a first mechanism for being held by the tip of the guide bar 111. The mold section 12 also has a sliding mechanism 202 constituting a second mechanism for being held by the mold (hereinafter referred to as the "opposing mold") that faces the mold section 12 and is the target of the mold opening and closing operation, out of the fixed side mold 30 and the movable side mold 20. Details of the configurations and operations of the sliding mechanisms 201 and 202 will be described later with reference to FIG. 2 and subsequent figures.

[0016] The support frame 13 is a member that detachably supports each of the first side and the second side of the mold part 12, and is fixed inside the injection molding machine 100. The support frame 13 is provided with a through hole 131 that penetrates in the opening and closing direction. The through hole 131 is a through hole for sliding a tie bar (not shown) that guides the mold opening and closing operation between the mold part 12 and the fixed side mold 30, and the mold opening and closing operation between the mold part 12 and the movable side mold 20. Note that since FIG. 1(B) is a cross-sectional view, only a portion of the support frame 13 that supports the second side of the mold part 12 is shown, but in reality, a portion that supports the first side of the mold part 12 exists.

[0017] The top member 14 is a member arranged on the top side of the support frame 13 in the top-bottom direction. The top member 14 and the support frame 13 may be detachably connected by bolts or the like, or may be joined by welding or the like. In addition, a bottom member (not shown) for fixing the support frame 13 to the inside of the injection molding machine 100 is arranged on the bottom side of the support frame 13.

[0018] The guide bar 111 and the mold section 12 held at the tip of the guide bar 111 are each configured to have a size that allows the rotational movement of the mold section 12 and the mold opening and closing movement of the mold section 12. In other words, the guide bar 111 and the mold section 12 are each configured to have a size and shape that prevents interference between a part (e.g., an end) of the mold section 12 and a part (e.g., an end) of the opposing mold when the mold section 12 held at the tip of the guide bar 111 rotates.

[0019] (Configuration and operation of cam lock mechanism) 2 to 4 are diagrams showing the configuration and operation of the cam lock mechanism. 2 to 4 show the state of the mold device 1 in Fig. 1 when viewed from the third side toward the fourth side in the rotation axis direction. In this embodiment, the "cam lock mechanism" refers to a mechanism for realizing, by one mold opening / closing operation, a switching state of the mold section 12 in which the mold section 12 rotates between a position facing the fixed side mold 30 and a position facing the movable side mold 20 (hereinafter referred to as a "first state") to a state facing either the fixed side mold 30 or the movable side mold 20 for performing a mold opening / closing operation (hereinafter referred to as a "second state").

[0020] That is, in the first state, the mold part 12 is temporarily held by the tip of the guide bar 111 and is not held by the opposing mold, so that it can rotate stably. Also, in the second state, the mold part 12 is temporarily held by the opposing mold and is not held by the tip of the guide bar 111, so that the effect of the impact caused by the mold closing operation can be suppressed when the mold is closed, and the mold release order can be observed when the mold is opened.

[0021] 2 to 4, the cam lock mechanism is composed of a block member 122 joined to the tip of the guide bar 111, sliding mechanisms 201 and 202 provided in the mold section 12, and a fixed hook 31 fixed to the fixed mold section 30. The block member 122 is a member having a function of locking the mold section 12 from sliding in the axial direction of the guide bar 111. The block member 122 has a first locking portion 123 and a second locking portion 124.

[0022] The first locking portion 123 is a convex portion protruding from the end of the first side in the opening and closing direction of the block member 122 toward the top side in the vertical direction. The first locking portion 123 locks the mold part 12 from sliding toward the rotary frame 11 side in the axial direction of the guide bar 111 (the first side in the opening and closing direction in Figs. 2 to 4). The second locking portion 124 is a surface formed at the end of the first side in the opening and closing direction of the block member 122. The second locking portion 124 locks the mold part 12 from sliding toward the tip side in the axial direction of the guide bar 111 (the second side in the opening and closing direction in Figs. 2 to 4). A buffer member 126 for buffering impact at the time of contact is disposed at the contact portion between the second locking portion 124 and the surface 121 on the second side of the mold part 12. The buffer member 126 is, for example, a foam member such as urethane.

[0023] The sliding mechanism 201 constitutes a part of the first mechanism, and is a mechanism for gripping the mold part 12 at the tip of the guide bar 111. The sliding mechanism 201 has a locked member 211, a fixed member 212, and a spring mechanism 213. The locked member 211 is a member that is locked to the block member 122 of the guide bar 111. The fixed member 212 is a member that fixes the sliding mechanism 201 to the surface 121 on the second side in the opening and closing direction of the mold part 12. A space for sliding the locked member 211 is formed inside the fixed member 212. The spring mechanism 213 is a mechanism for sliding the locked member 211 toward the guide bar 111 by using the elastic force of the spring, and for locking the locked member 211 to the block member 122. Note that a shock absorber, a gas spring, a cylinder, or the like may be used instead of the spring mechanism 213.

[0024] The sliding mechanism 202 constitutes a part of the second mechanism, and is a mechanism for holding the mold part 12 by the fixed mold part 30. The sliding mechanism 202 has a movable hook 221, a fixed member 222, and a spring mechanism 223. The movable hook 221 is a member that is engaged with the fixed hook 31 of the fixed mold part 30. The fixed member 222 is a member that fixes the sliding mechanism 202 to the second side surface 121 of the mold part 12. A space for sliding the movable hook 221 is formed inside the fixed member 222. The spring mechanism 223 is a mechanism for sliding the movable hook 221 toward the guide bar 111 by using the elastic force of the spring, and for engaging with the fixed hook 31 of the fixed mold part 30. Note that a shock absorber, a gas spring, a cylinder, or the like may be used instead of the spring mechanism 223.

[0025] The state of the mold part 12 shown in Fig. 2 is the first state. As shown in Fig. 2, when the mold part 12 is in the first state, the first locking part 123 of the block member 122 of the guide bar 111 locks the locked member 211 of the sliding mechanism 201 of the mold part 12, and the second locking part 124 of the block member 122 locks the second side surface 121 of the mold part 12. In addition, the pressing part 125 forming the bottom surface of the block member 122 presses the pressed part 224 forming the top surface of the movable hook 221 of the sliding mechanism 202 of the mold part 12 to the bottom side, thereby pressing the movable hook 221 down.

[0026] In the first state of the mold section 12, the inclination angle of the surface of the first locking portion 123 of the block member 122 on the second side in the opening / closing direction is the same or approximately the same as the inclination angle of the surface of the locked member 211 of the sliding mechanism 201 on the first side in the opening / closing direction. As a result, the first locking portion 123 locks the locked member 211 with the surface, and a force is applied uniformly to the first locking portion 123. In contrast, if the inclination angles are not the same or approximately the same, a biased force is applied to the first locking portion 123, increasing the risk of poor contact, deterioration, damage, and the like.

[0027] Furthermore, in this embodiment, the surface of the first locking portion 123 on the second side in the opening / closing direction and the surface of the locked member 211 on the first side in the opening / closing direction are both inclined so that the end on the bottom side is located closer to the second side in the opening / closing direction than the end on the top side in the top-bottom direction. This makes it easier for the surface of the first locking portion 123 on the second side in the opening / closing direction and the surface of the locked member 211 on the first side in the opening / closing direction to slide against each other when the block member 122 moves toward the second side in the opening / closing direction. As a result, the release operation of the locked member 211 locked by the first locking portion 123 becomes smooth.

[0028] Furthermore, in the first state of the mold section 12, the inclination angle of the second locking portion 124 of the block member 122 is the same or approximately the same as the inclination angle of the surface on the second side in the opening / closing direction of the mold section 12. As a result, the second locking portion 124 locks the mold section 12 with the surface, and a force is applied uniformly to the second locking portion 124. In contrast, if the inclination angles are not the same or approximately the same, a biased force is applied to the second locking portion 124, increasing the risk of poor contact, deterioration, damage, and the like.

[0029] Furthermore, in the first state of the mold section 12, the inclination angle of the pressing section 125 of the block member 122 is the same or approximately the same as the inclination angle of the pressed section 224 of the movable hook 221 of the sliding mechanism 202. As a result, the pressing section 125 presses the pressed section 224 with a surface, so that a force is applied uniformly to the pressed section 224. In contrast, if the inclination angles are not the same or approximately the same, a biased force is applied to the pressed section 224, increasing the risk of poor contact and the like.

[0030] Furthermore, the pressing portion 125 of the block member 122 according to this embodiment and the pressed portion 224 of the movable hook 221 of the sliding mechanism 202 are both inclined so that the end on the second side is located closer to the ground in the up-down direction than the end on the first side in the opening / closing direction. As a result, when the block member 122 moves to the first side in the opening / closing direction, the pressing portion 125 slides against the pressed portion 224 and presses down the movable hook 221, releasing the movable hook 221 engaged with the fixed hook 31.

[0031] The state of the mold part 12 shown in Figures 3 and 4 is the second state. When the mold closing operation between the mold part 12 and the fixed mold part 30 starts, that is, when the state in which the block member 122 locks the mold part 12 is released and the movable hook 221 and the fixed hook 31 engage with each other, the state of the mold part 12 transitions from the first state to the second state. During the mold closing operation between the mold part 12 and the fixed mold part 30, the guide bar 111 is inserted into the fixed mold part 30. Then, as shown in Figure 3, the roller follower 32 of the fixed mold part 30 comes into contact with the locked member 211 and pushes up the locked member 211. 1 described above, the roller follower 32 having a rotation axis in the direction of the rotation axis rolls on the surface of the pressed surface 214 of the locked member 211, pressing the locked member 211 in a direction away from the guide bar 111 (the top side in the top-bottom direction and the first side in the opening / closing direction in FIG. 3), and pushing up the locked member 211. This releases the state in which the block member 122 has locked the locked member 211. As a result, the mold section 12 slides the guide bar 111 toward the rotating frame 11.

[0032] 3 and 4, the pressed surface 214 of the locked member 211 of the sliding mechanism 201 is inclined so that the end on the second side is located closer to the top in the vertical direction than the end on the first side in the opening / closing direction. This makes it easier for the roller follower 32 of the fixed mold 30 to roll on the surface of the pressed surface 214 of the locked member 211 when the roller follower 32 pushes up the locked member 211 while rolling on the surface of the pressed surface 214. The roller follower 32 may be replaced with another tapered member having a similar inclination angle.

[0033] Furthermore, when the guide bar 111 is inserted into the fixed mold 30, the state in which the block member 122 has locked the movable hook 221 is released. Then, the elastic force of the spring mechanism 223 causes the movable hook 221 to slide toward the guide bar 111, and the movable hook 221 and the fixed hook 31 are engaged with each other. Thereafter, the guide bar 111 is completely inserted into the fixed mold 30, and the rotating frame 11 and the mold section 12 come into contact with each other. This completes the mold closing operation between the mold section 12 and the fixed mold 30, resulting in the state shown in FIG. 4.

[0034] When the mold closing operation between the mold part 12 and the fixed mold part 30 is completed, the mold opening operation is started. The mold opening operation is an operation for returning the second state shown in Fig. 4 described above to the first state shown in Fig. 2 described above. That is, when the engagement between the movable hook 221 and the fixed hook 31 is released and the block member 122 engages the mold part 12, the state of the mold part 12 transitions from the second state to the first state. In the mold opening operation between the mold part 12 and the fixed mold part 30, the guide bar 111 is pulled out from the fixed mold part 30.

[0035] Then, as shown in Fig. 2, the roller follower 32 of the fixed side mold 30 and the locked member 211 are separated from each other, and the spring mechanism 213 slides the locked member 211 toward the guide bar 111. Specifically, when the roller follower 32 rolls on the surface of the pressed surface 214 of the locked member 211 and then separates, the spring mechanism 213 presses the locked member 211 in a direction approaching the guide bar 111 (toward the earth side in the top-to-bottom direction in Fig. 2), and presses down the locked member 211. This causes the block member 122 to lock the locked member 211. As a result, the mold section 12 is locked from sliding the guide bar 111 toward the rotary frame 11.

[0036] Furthermore, when the guide bar 111 is pulled out from the fixed mold 30, the pressing portion 125 of the block member 122 comes into contact with the pressed portion 224 of the movable hook 221 and presses the movable hook 221. Then, the movable hook 221 slides in a direction away from the guide bar 111 (toward the ground in the top-to-bottom direction in FIG. 2), and the engagement between the movable hook 221 and the fixed hook 31 is released, releasing the movable hook 221. This completes the mold opening operation between the mold part 12 and the fixed mold 30, resulting in the state shown in FIG. 2.

[0037] FIG. 5 is a diagram showing the state when the mold part 12 in the first state is positioned on the upper side in the top-bottom direction. As shown in Fig. 5, when the mold part 12 is located on the upper side in the top-to-bottom direction, a force is applied to the mold part 12 to slide along the guide bar 111 toward the rotating frame 11. However, even in the state shown in Fig. 5, similarly to the state shown in Fig. 2 described above, the first locking portion 123 of the block member 122 of the guide bar 111 locks the locked member 211 of the sliding mechanism 201 of the mold part 12. As a result, the mold part 12 does not slide along the guide bar 111 toward the rotating frame 11.

[0038] Furthermore, when the mold part 12 is located on the top side, a force is applied to the mold part 12 to slide it toward the tip along the guide bar 111 due to the centrifugal force generated during rotational movement. However, even in the state shown in FIG. 5, similar to the state shown in FIG. 2 described above, the second locking part 124 of the block member 122 of the guide bar 111 locks the second side surface 121 of the mold part 12. As a result, the mold part 12 does not slide toward the tip along the guide bar 111. For the above reasons, even in the state shown in FIG. 5, the mold part 12 is maintained in a state where it is held by the tip of the guide bar 111.

[0039] In summary, the intermediate mold, mold device, and injection molding machine to which the present invention is applied may have the following configurations and may take a variety of different forms. In other words, the intermediate mold 10 in this embodiment is an intermediate mold arranged between a fixed side mold 30 and a movable side mold 20 in a mold device 1 of an injection molding machine 100, and is characterized in that it comprises a mold section 12 that performs mold opening and closing operations with the opposing mold (fixed side mold 30 or movable side mold 20) between the fixed side mold 30 and the movable side mold 20, a guide bar 111 that penetrates the mold section 12 and guides the mold opening and closing operations, and a rotating frame 11 that has a rotation axis 200 and rotates together with the guide bar 111 and the mold section 12 while being joined to the guide bar 111, and the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold.

[0040] As a result, in an intermediate mold 10 having a mold section 12 which performs mold opening and closing operations with an opposing mold, a guide bar 111 which guides the mold opening and closing operations while penetrating the mold section 12, and a rotating frame 11 which rotates together with the guide bar 111 and the mold section 12 while being joined to the guide bar 111, the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold. As a result, it becomes possible to switch the state of the mold section 12 between a state where it is held by the tip of the guide bar 111 and a state where it is held by the opposing mold by the mold opening and closing operations.

[0041] Here, the mold part 12 may be grasped by the tip of the guide bar 111 when it rotates between positions facing the opposing mold and when it opens with the opposing mold, and may be grasped by the opposing mold when it closes with the opposing mold. Thereby, the mold section 12 is gripped by the tip of the guide bar 111 when it rotates between positions facing the counter mold and when it is opened with the counter mold, and is gripped by the counter mold when it is closed with the counter mold. As a result, the mold section 12 can be switched between a first state in which it is gripped by the tip of the guide bar 111 and can rotate between positions facing the counter mold, and a second state in which it faces either the fixed mold 30 or the movable mold 20 to perform the mold opening and closing operation, by the mold opening and closing operation.

[0042] In addition, the tip of the guide bar 111 and the mold portion 12 may have a first mechanism (block member 122 and sliding mechanism 201) for gripping the mold portion 12 to the guide bar 111, and a second mechanism (block member 122 and sliding mechanism 202) for gripping the mold portion 12 to the opposing mold. Thereby, at the tip of the guide bar 111, the first mechanism functions to grip the mold part 12, and the second mechanism functions to grip the mold part 12 with the opposing mold. As a result, it is possible to create two states of the mold part 12: a first state in which the mold part 12 is rotatably movable between a position facing the opposing mold while being gripped at the tip of the guide bar 111, and a second state in which the mold part 12 faces either the fixed mold part 30 or the movable mold part 20 to perform mold opening and closing operations.

[0043] In addition, the first mechanism may release the mold part 12 when the mold part 12 is gripped by the opposing mold, and cause the mold part 12 to be gripped by the guide bar 111 when the mold part 12 is released from the opposing mold. As a result, the first mechanism releases the mold part 12 when it is gripped by the opposing mold, and grips the mold part 12 by the guide bar 111 when it is released from the opposing mold, so that smooth switching between a state in which the mold part 12 is gripped by the tip of the guide bar 111 and a state in which the mold part 12 is gripped by the opposing mold is achieved.

[0044] The first mechanism may also have a locking member (block member 122) that locks the mold portion 12 against sliding in the axial direction of the guide bar 111. As a result, the locking member of the first mechanism locks the mold part 12 so that it does not slide in the axial direction of the guide bar 111, so that the mold part 12 can be gripped by the tip of the guide bar 111.

[0045] In addition, the locking member may have a first locking portion 123 that locks the mold portion 12 from sliding toward the axial tip side of the guide bar 111, and a second locking portion 124 that locks the mold portion 12 from sliding toward the rotating frame 11 side of the guide bar 111 in the axial direction. Thereby, the first locking portion 123 of the locking member locks the mold part 12 from sliding toward the tip side in the axial direction of the guide bar 111, and the second locking portion 124 of the locking member locks the mold part 12 from sliding toward the rotating frame 11 side in the axial direction of the guide bar 111. As a result, the mold part 12 can be gripped by the tip part of the guide bar 111.

[0046] Furthermore, the mold part 12 may have a locked member 211 that is locked to the first locking portion 123 during rotational movement and mold opening, and is released from the first locking portion 123 by being pressed and moved when the mold is opened. As a result, the locked member 211 of the mold section 12 is locked to the first locking portion 123 during rotational movement and mold opening, and is released from the first locking portion 123 by being pressed and moved during mold opening. As a result, it is possible to switch the state of the mold section 12 in accordance with the mold opening and closing operations.

[0047] The locked member may be released from the first locking portion 123 by being pressed and moved by a pressing member (roller follower 32) provided on the opposing die. Thereby, the locked member is pressed by a pressing member provided on the opposing mold and moved, and is released from the first locking portion 123. As a result, it becomes possible to release the mold portion 12 from the guide bar 111 in accordance with the mold closing operation.

[0048] In addition, the second mechanism may have a movable hook 221 that is movable when pressed, and a pressing member (block member 122) that presses the movable hook 221, and engage the movable hook 221 with a fixed hook 31 fixed to the opposing mold. Thereby, the movable hook 221 is pressed by the pressing member and moves to engage with the fixed hook 31. As a result, the mold part 12 can be gripped by the opposing mold in accordance with the mold closing operation.

[0049] Furthermore, when the movable hook 221 is moved by being pressed by a pressing member (block member 122) provided at the tip of the guide bar 111 during mold opening, the engagement state with the fixed hook 31 may be released. As a result, when the movable hook 221 is moved by being pressed by a pressing member provided at the tip of the guide bar 111 during mold opening, the engagement state with the fixed hook 31 is released. As a result, the mold part 12 gripped by the opposing mold can be released in accordance with the mold opening operation.

[0050] Furthermore, the locking member of the first mechanism may be a member (block member 122) that is integrally formed with the pressing member of the second mechanism. As a result, the locking member of the first mechanism and the pressing member of the second mechanism are integrally formed, making it possible to make the mechanisms more compact.

[0051] Furthermore, each of the mold part 12 and the guide bar 111 may be configured to have a size and shape that allows the rotational movement of the mold part 12 and the mold opening and closing operations. As a result, each of the mold part 12 and the guide bar 111 is configured with a size and shape that allows the rotational movement of the mold part 12 and the mold opening and closing operations, so that when the mold part 12 held at the tip of the guide bar 111 rotates, interference such as collision between the mold part 12 and the opposing mold can be suppressed.

[0052] Moreover, the mold apparatus 1 in this embodiment is a mold apparatus for an injection molding machine 100, and is characterized in that the intermediate mold 10 arranged between the fixed side mold 30 and the movable side mold 20 is provided with a mold section 12 that performs mold opening and closing operations with an opposing mold between the fixed side mold 30 and the movable side mold 20, a guide bar 111 that penetrates the mold section 12 and guides the mold opening and closing operations, and a rotating frame 11 that has a rotation axis 200 and rotates together with the guide bar 111 and the mold section 12 while being joined to the guide bar 111, and the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold.

[0053] As a result, in a mold device 1 including an intermediate mold 10 having a mold section 12 that performs mold opening and closing operations with an opposing mold, a guide bar 111 that guides the mold opening and closing operations while penetrating the mold section 12, and a rotating frame 11 that rotates together with the guide bar 111 and the mold section 12 while joined to the guide bar 111, the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold. As a result, the mold section 12 can be switched between a first state in which it can rotate between a position facing the fixed side mold 30 and a position facing the movable side mold 20, and a second state in which it faces either the fixed side mold 30 or the movable side mold 20 to perform mold opening and closing operations, by the mold opening and closing operation.

[0054] In addition, the injection molding machine 100 in this embodiment is an injection molding machine equipped with a mold device 1 consisting of a fixed side mold 30, a movable side mold 20, and an intermediate mold 10 arranged between the fixed side mold 30 and the movable side mold 20, in which the intermediate mold 10 is equipped with a mold section 12 that performs mold opening and closing operations with an opposing mold between the fixed side mold 30 and the movable side mold 20, a guide bar 111 that penetrates the mold section 12 and guides the mold opening and closing operations, and a rotating frame 11 that has a rotating shaft 200 and rotates together with the guide bar 111 and the mold section 12 while being joined to the guide bar 111, and is characterized in that the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold.

[0055] As a result, in an injection molding machine 100 equipped with a mold device 1 including an intermediate mold 10 having a mold section 12 that performs mold opening and closing operations with an opposing mold, a guide bar 111 that guides the mold opening and closing operations while penetrating the mold section 12, and a rotating frame 11 that rotates together with the guide bar 111 and the mold section 12 while joined to the guide bar 111, the mold section 12 is temporarily held by the tip of the guide bar 111 and temporarily held by the opposing mold. As a result, the mold section 12 can be switched between a first state in which it can rotate between a position facing the fixed side mold 30 and a position facing the movable side mold 20, and a second state in which it faces either the fixed side mold 30 or the movable side mold 20 to perform mold opening and closing operations, by the mold opening and closing operation. [Explanation of symbols]

[0056] 1... die device, 10... intermediate die, 11... rotating frame, 12... die section, 13... support frame, 14... upper member, 31... fixed hook, 32... roller follower, 111... guide bar, 122... block member, 200... rotating shaft, 201, 202... sliding mechanism, 211... engaged member, 221... movable hook

Claims

1. An intermediate mold disposed between a fixed mold and a movable mold in a mold assembly of an injection molding machine, a mold section that performs a mold opening and closing operation with a counter mold between the fixed mold and the movable mold; A guide bar that passes through the mold portion and guides the mold opening and closing operation; a rotary frame having a rotary shaft and joined to the guide bar and rotating together with the guide bar and the mold part; Equipped with The mold part is temporarily held by the tip part of the guide bar and temporarily held by the opposing mold. Intermediate mold.

2. The mold part is held by the tip part of the guide bar when the mold part rotates between positions facing the counter mold and when the mold part is opened with the counter mold, and is held by the counter mold when the mold part is closed with the counter mold. The intermediate mold according to claim 1 .

3. The present invention is characterized in that the tip of the guide bar and the mold part have a first mechanism for holding the mold part by the guide bar and a second mechanism for holding the mold part by the opposing mold. The intermediate mold according to claim 2 .

4. The first mechanism releases the mold part when the mold part is gripped by the opposing mold, and causes the mold part to be gripped by the guide bar when the mold part is released from the opposing mold. The intermediate mold according to claim 3.

5. The first mechanism has a locking member that locks the mold part from sliding in the axial direction of the guide bar.

5. The intermediate mold according to claim 4.

6. The locking member has a first locking portion that locks the mold portion against sliding toward the tip side in the axial direction of the guide bar, and a second locking portion that locks the mold portion against sliding toward the rotating frame side in the axial direction of the guide bar. The intermediate mold according to claim 5.

7. The mold part is characterized in that it has a locked member that is locked to the first locking part during the rotational movement and the mold opening, and is released from the first locking part by being pressed and moved during the mold opening.

7. The intermediate mold according to claim 6.

8. The locked member is released from the first locking portion by being pressed by a pressing member provided on the opposing mold and moved.

8. The intermediate mold according to claim 7.

9. the second mechanism has a movable hook portion that is movable when pressed, and a pressing member that presses the movable hook portion, and engages the movable hook portion with a fixed hook portion fixed to the opposing mold. The intermediate mold according to claim 8.

10. When the movable hook portion is moved by being pressed by a pressing member provided at the tip of the guide bar during the mold opening, the movable hook portion is released from an engaged state with the fixed hook portion.

10. The intermediate mould according to claim 9.

11. The locking member of the first mechanism is a member integrally formed with the pressing member of the second mechanism. The intermediate mold according to claim 10.

12. The mold part and the guide bar are each configured to have a size and a shape that allows the rotational movement of the mold part and the mold opening and closing operation. The intermediate mold according to claim 2 .

13. A mold device of an injection molding machine, An intermediate die disposed between the fixed die and the movable die, a mold section that performs a mold opening and closing operation with a counter mold between the fixed mold and the movable mold; A guide bar that passes through the mold portion and guides the mold opening and closing operation; A rotary frame having a rotary shaft and joined to the guide bar, the rotary frame rotating together with the guide bar and the mold part; Equipped with The mold part is temporarily held by the tip part of the guide bar and temporarily held by the opposing mold. Mold equipment.

14. An injection molding machine equipped with a mold assembly including a fixed mold, a movable mold, and an intermediate mold disposed between the fixed mold and the movable mold, The intermediate mold is a mold section that performs a mold opening and closing operation with a counter mold between the fixed mold and the movable mold; A guide bar that passes through the mold portion and guides the mold opening and closing operation; A rotary frame having a rotary shaft and joined to the guide bar, the rotary frame rotating together with the guide bar and the mold part; Equipped with The mold part is temporarily held by the tip part of the guide bar and temporarily held by the opposing mold. Injection molding machine.

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