Intermediate mold

Abstract

To switch between a state of facing any one of a fixed-side mold and a movable-side mold within a state of a rotating mold in order to perform a mold opening / closing operation and a state movable while rotating between a position facing the fixed-side mold and a position facing the movable-side mold, by the mold opening / closing operation.SOLUTION: An intermediate mold 10 disposed between a fixed-side mold and a movable-side mold in a mold device of an injection molding machine includes: a mold part 12 that performs a mold opening / closing operation with couter molds facing each other out of the fixed-side mold and the movable-side mold; a guide bar 111 that passes through the mold part 12 and guides the mold opening / closing operation; and a rotary frame 11 that has a rotation axis and rotates with the guide bar 111 and the mold part 12 in a state of being joined to the guide bar 111. The mold part 12 is temporarily held by a tip of the guide bar 111 and is temporarily held by the counter molds.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an intermediate mold. [Background technology]

[0002] Some injection molding machines include a mold assembly in which an intermediate mold is disposed between a fixed mold and a movable mold. The intermediate mold may include a rotating mold that rotates and moves between a position facing the fixed mold and a position facing the movable mold, alternately opening and closing the mold at each position (see, for example, Patent Document 1). Such a rotating mold is controlled so that it alternates between 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 the respective positions. [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 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, using the mold opening and closing operations.

[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 mold opening and closing operations. [Means for solving the problem]

[0006] The present invention, which was completed with the above object in mind, is an intermediate mold arranged between a fixed-side mold and a movable-side mold in a mold assembly of an injection molding machine, comprising: a mold section that performs mold opening and closing operations with an opposing mold between 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; a rotary frame that has a rotation axis and is joined to the guide bar and rotates together with the guide bar and the mold section; a block member that constitutes part of a first mechanism that temporarily grips the mold section at the tip of the guide bar; and a second mechanism that includes a hook section provided on the opposing mold and a movable hook section that engages with the hook section to temporarily grip the mold section to the opposing mold, wherein the block member, as part of the first mechanism, has a first locking section that locks the mold section so that it does not slide toward the rotary frame in the axial direction of the guide bar, and a pressing section that moves the movable hook section to press the pressed section of the movable hook section to release the engagement of the hook section. the second mechanism including a hook portion provided on the opposing mold and a movable hook portion engaged with the hook portion to temporarily hold the mold portion to the opposing mold, wherein the block member has a pressing portion that presses a pressed portion of the movable hook portion to move the movable hook portion to release the engagement of the hook portion, and the surface of the block member that forms the pressing portion and the surface of the movable hook portion that forms the pressed portion are parallel or approximately parallel. [Effects 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 mold or the 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 the mold opening and closing operation. [Brief explanation 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. [Figure 2] 10A and 10B are diagrams illustrating the configuration and operation of a cam lock mechanism. [Figure 3] 10A and 10B are diagrams illustrating the configuration and operation of a cam lock mechanism. [Figure 4] 10A and 10B are diagrams illustrating the configuration and operation of a cam lock mechanism. [Figure 5] FIG. 10 is a diagram showing the state when the mold part in the first state is positioned on the top side in the vertical direction. DETAILED DESCRIPTION OF THE INVENTION

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

[0011] The injection molding machine 100 is equipped with a mold assembly 1 shown in FIG. 1(B). The mold assembly 1 is a mold assembly that enables injection blow molding, and is configured to include an intermediate mold 10, a fixed mold 30, and a movable mold 20. The intermediate mold 10 is a rotary mold disposed between the fixed mold 30 and the movable 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 positions facing the fixed mold 30 and the movable mold 20, respectively. The mold assembly 1 performs injection molding by the mold closing operation between the intermediate mold 10 and the fixed mold 30, and performs blow molding by the mold closing operation between the intermediate mold 10 and the movable 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 bearings of the support frame 13 in a state where it is attached to a third side and a 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 unit 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 rotary 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 prevents the mold section 12 from sliding 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 mold plates, 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 with it, 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 gripped by the tip of the guide bar 111. The mold section 12 also has a sliding mechanism 202 constituting a second mechanism for being gripped 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, either the fixed mold section 30 or the movable mold section 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 the first support of the mold part 12. 3 Side and second 4 The support frame 13 is a member that detachably supports each of the mold sections 12 and 30, and is fixed inside the injection molding machine 100. The support frame 13 is provided with through holes 131 that penetrate in the opening and closing direction. The through holes 131 are through holes for sliding tie bars (not shown) that guide the mold opening and closing operation between the mold section 12 and the fixed-side mold 30, and the mold opening and closing operation between the mold section 12 and the movable-side mold 20. Note that, since FIG. 1(B) is a cross-sectional view, only the first part of the support frame 13 that supports the mold section 12 is shown. 4 Although only the part supporting the side is shown, in reality, the first side of the mold part 12 3There are parts that support the sides.

[0017] The top member 14 is a member arranged on the top side of the support frame 13 in the vertical direction. The top member 14 and the support frame 13 may be detachably connected with 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 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 a size and shape that prevents interference between a part (for example, an end) of the mold section 12 and a part (for example, 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 states of the mold apparatus 1 when viewed from the third side toward the fourth side in the rotation axis direction of the mold apparatus 1 in Fig. 1. In this embodiment, the "cam lock mechanism" refers to a mechanism for switching, by a single mold opening / closing operation, the state of the mold section 12 in which it rotates and moves 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 in which it faces either the fixed-side mold 30 or the movable-side mold 20 to perform 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, allowing for stable rotational movement. 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 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 that has the function of locking the mold section 12 so that it does not slide 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 that protrudes upward from the end of the block member 122 on a first side in the opening / closing direction. The first locking portion 123 locks the mold section 12 from sliding toward the rotary frame 11 in the axial direction of the guide bar 111 (the first side in the opening / closing direction in FIGS. 2 to 4). The second locking portion 124 is a surface formed on the end of the block member 122 on the first side in the opening / closing direction. The second locking portion 124 locks the mold section 12 from sliding toward the tip side of the guide bar 111 in the axial direction (the second side in the opening / closing direction in FIGS. 2 to 4). A buffer member 126 is disposed at the contact portion between the second locking portion 124 and the surface 121 on the second side of the mold section 12 to buffer impacts upon contact. The buffer member 126 is, for example, a foam material such as urethane.

[0023] The sliding mechanism 201 constitutes part of the first mechanism and is a mechanism for gripping the mold section 12 at the tip end 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 / closing direction of the mold section 12. A space for sliding the locked member 211 is formed inside the fixed member 212. The spring mechanism 213 is a mechanism that uses the elastic force of a spring to slide the locked member 211 toward the guide bar 111 and lock it 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 engages 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 that uses the elastic force of the spring to slide the movable hook 221 toward the guide bar 111 and engages 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 unit 12 shown in Fig. 2 is the first state. As shown in Fig. 2, when the mold unit 12 is in the first state, 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 unit 12, and the second locking portion 124 of the block member 122 locks the second-side surface 121 of the mold unit 12. In addition, the pressing portion 125 forming the bottom surface of the block member 122 presses the pressed portion 224 forming the top surface of the movable hook 221 of the sliding mechanism 202 of the mold unit 12 toward the bottom, 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 as 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 bottom end is located closer to the second side in the opening / closing direction than the top end in the up-down 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 unlocking operation of the locked member 211 locked by the first locking portion 123 is 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, and 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, in this embodiment, the pressing portion 125 of the block member 122 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 positioned closer to the ground in the vertical 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 from engagement with the fixed hook 31.

[0031] 3 and 4 show the mold section 12 in a second state. When the mold closing operation between the mold section 12 and the fixed mold section 30 starts, that is, when the state in which the block member 122 locks the mold section 12 is released and the movable hook 221 engages with the fixed hook 31, the mold section 12 transitions from the first state to the second state. During the mold closing operation between the mold section 12 and the fixed mold section 30, the guide bar 111 is inserted into the fixed mold section 30. Then, as shown in FIG. 3, the roller follower 32 of the fixed mold section 30 comes into contact with the locked member 211 and pushes up the locked member 211. 1 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 (toward the top side in the top-bottom direction and the first side in the opening / closing direction in FIG. 3), and pushes 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 on the guide bar 111 toward the rotary 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 second end in the opening / closing direction is positioned closer to the top in the vertical direction than the first end. This makes it easier for the roller followers 32 of the fixed mold 30 to roll on the surface of the pressed surface 214 of the locked member 211 when they press up the locked member 211 while rolling on the surface of the pressed surface 214. The roller followers 32 may be replaced with other tapered members having a similar angle of inclination.

[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 engage with each other. Thereafter, the guide bar 111 is completely inserted into the fixed mold 30, and the rotary 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 section 12 and the fixed mold section 30 is completed, the mold opening operation is started. The mold opening operation is an operation that returns 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 locks the mold section 12, the state of the mold section 12 transitions from the second state to the first state. In the mold opening operation between the mold section 12 and the fixed mold section 30, the guide bar 111 is pulled out from the fixed mold section 30.

[0035] 2, the roller followers 32 of the fixed 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 followers 32 roll on the surface of the pressed surface 214 of the locked member 211 and then separate, the spring mechanism 213 presses the locked member 211 in a direction approaching the guide bar 111 (toward the ground 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 so that the guide bar 111 does not slide 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 vertical 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 section 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 top side in the vertical direction. As shown in Fig. 5, when the mold section 12 is positioned on the top side in the vertical direction, a force is applied to the mold section 12 to slide it along the guide bar 111 toward the rotary frame 11. However, even in the state shown in Fig. 5, similar to the state shown in Fig. 2, 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 section 12. As a result, the mold section 12 does not slide along the guide bar 111 toward the rotary frame 11.

[0038] Furthermore, when the mold section 12 is positioned on the upper side, centrifugal force generated during rotational movement acts on the mold section 12, causing it to slide distally along the guide bar 111. However, even in the state shown in FIG. 5, similar to the state shown in FIG. 2, the second locking portion 124 of the block member 122 of the guide bar 111 locks the second-side surface 121 of the mold section 12. This prevents the mold section 12 from sliding distally along the guide bar 111. For these reasons, even in the state shown in FIG. 5, the mold section 12 remains gripped by the distal end of the guide bar 111.

[0039] In summary, the intermediate mold, mold device, and injection molding machine to which the present invention is applied only need to have the following configurations, and various embodiments can be adopted. In other words, the intermediate mold 10 in this embodiment is an intermediate mold arranged between the fixed side mold 30 and the movable side mold 20 in the mold device 1 of the injection molding machine 100, and is equipped with a mold section 12 that performs mold opening and closing operations with the opposing mold (fixed side mold 30 or movable side mold 20) that faces the fixed side mold 30 or 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 body 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 is an intermediate mold characterized in that the mold section 12 is temporarily held at 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 that performs mold opening and closing operations together with an opposing mold, a guide bar 111 that guides the mold opening and closing operations while penetrating the mold section 12, and a rotary frame 11 that is joined to the guide bar 111 and rotates together with the guide bar 111 and the mold section 12, the mold section 12 is temporarily held by the tip of the guide bar 111 and is temporarily held by the opposing mold. As a result, it is 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 operation.

[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. As a result, 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 the mold is opened with the counter mold, and is gripped by the counter mold when the mold 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 part 12 may have a first mechanism (block member 122 and sliding mechanism 201) for gripping the mold part 12 to the guide bar 111, and a second mechanism (block member 122 and sliding mechanism 202) for gripping the mold part 12 to the opposing mold. As a result, the first mechanism functions to grip the mold section 12 at the tip of the guide bar 111, and the second mechanism functions to grip the mold section 12 to the opposing mold. As a result, it is possible to create two states of the mold section 12: a first state in which the mold section 12 is held by the tip of the guide bar 111 and can rotate between positions facing the opposing mold, and a second state in which the mold section 12 faces either the fixed mold section 30 or the movable mold section 20 to perform mold opening and closing operations.

[0043] The first mechanism may also release the mold part 12 when the mold part 12 is gripped by the opposing mold, and grip the mold part 12 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 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 carried out smoothly.

[0044] The first mechanism may also have a locking member (blocking member 122) that locks the mold part 12 so that it does not slide 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, and the mold part 12 can be gripped by the tip of the guide bar 111.

[0045] The locking member may also 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 body 11 side of the guide bar 111 in the axial direction. As a result, the first locking portion 123 of the locking member locks the mold section 12 so that it does not slide 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 section 12 so that it does not slide toward the rotary frame 11 in the axial direction of the guide bar 111. As a result, the mold section 12 can be gripped by the tip portion of the guide bar 111.

[0046] In addition, the mold part 12 may have an engaged member 211 that is engaged with the first engaging portion 123 during rotational movement and mold opening, and is released from the first engaging 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 by 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 by a pressing member (roller follower 32) provided on the opposing mold and moving. As a result, the locked member is pressed by the pressing member provided on the opposing mold and moves, thereby being 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] The second mechanism may also have a movable hook 221 that moves 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. As a result, the movable hook 221 is pressed by the pressing member and moves, thereby engaging with the fixed hook 31. As a result, the opposing mold can grip the mold part 12 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 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 mold part 12 to rotate and move and open and close. As a result, the mold section 12 and the guide bar 111 are each configured to a size and shape that allows the mold section 12 to rotate and move open and close, so that when the mold section 12 held at the tip of the guide bar 111 rotates, interference such as collision between the mold section 12 and the opposing mold can be suppressed.

[0052] Furthermore, the mold device 1 according to this embodiment is a mold device 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 comprises a mold section 12 that performs mold opening and closing operations with the 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 joined to the guide bar 111, and the mold section 12 is temporarily held at the tip of the guide bar 111 and temporarily held by the opposing mold.

[0053] As a result, in a mold apparatus 1 including an intermediate mold 10 having a mold section 12 that performs mold opening and closing operations together with an opposing mold, a guide bar 111 that guides the mold opening and closing operations while penetrating the mold section 12, and a rotary frame 11 that is joined to the guide bar 111 and rotates together with the guide bar 111 and the mold section 12, the mold section 12 is temporarily held by the tip of the guide bar 111 and is temporarily held by the opposing mold. As a result, the mold section 12 can be switched between a first state in which it is rotatable 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 of 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, and the intermediate mold 10 is equipped with a mold section 12 that performs mold opening and closing operations with the 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 is joined to the guide bar 111 and rotates together with the guide bar 111 and the mold section 12, and is an injection molding machine characterized in that the mold section 12 is temporarily held at 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 rotary frame 11 that is joined to the guide bar 111 and rotates together with the guide bar 111 and the mold section 12, the mold section 12 is temporarily held by the tip of the guide bar 111 and is temporarily held by the opposing mold. As a result, the mold section 12 can be switched between a first state in which it is rotatable 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... mold device, 10... intermediate mold, 11... rotary frame body, 12... mold portion, 13... support frame, 14... upper side member, 31... fixed hook, 32... roller follower, 111... guide bar, 122... block member, 200... rotary shaft, 201, 202... sliding mechanism, 211... locked 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 mold opening and closing operations with an opposing mold between the fixed mold and the movable mold; a guide bar that penetrates the mold portion and guides the mold opening and closing operation; a rotary frame having a rotation axis and joined to the guide bar to rotate together with the guide bar and the mold section; a block member that constitutes a part of a first mechanism that temporarily holds the mold part at the tip end of the guide bar and that constitutes a part of a second mechanism that temporarily holds the mold part to the opposing mold; a movable hook portion that constitutes a part of the second mechanism together with a hook portion provided on the opposing mold and is engaged with the hook portion; Equipped with The block member has, as a part of the first mechanism, a first locking portion that locks the mold portion so that it does not slide toward the rotary frame body in the axial direction of the guide bar, and, as a part of the second mechanism, a pressing portion that presses a pressed portion of the movable hook portion to move the movable hook portion to release the engagement of the hook portion. Intermediate mold.

2. 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 mold opening and closing operations with an opposing mold between the fixed mold and the movable mold; a guide bar that penetrates the mold portion and guides the mold opening and closing operation; a rotary frame having a rotation axis and joined to the guide bar to rotate together with the guide bar and the mold section; a block member that constitutes a part of a first mechanism that temporarily holds the mold part at the tip end of the guide bar and that constitutes a part of a second mechanism that temporarily holds the mold part to the opposing mold; a movable hook portion that constitutes a part of the second mechanism together with a hook portion provided on the opposing mold and is engaged with the hook portion; Equipped with the block member has, as a part of the second mechanism, a pressing portion that presses a pressed portion of the movable hook portion to move the movable hook portion in order to release the engagement of the hook portion, The inclination angle of the surface forming the pressing portion of the block member and the inclination angle of the surface forming the pressed portion of the movable hook portion are the same, or are approximately the same to the extent that the surface forming the pressing portion can press the surface forming the pressed portion. Intermediate mold.

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