Intermediate mold, mold apparatus and injection molder

Abstract

To compactly house a mold apparatus including an intermediate mold inside an injection molder.SOLUTION: An intermediate mold 10 is arranged between a stationary side mold and a movable side mold in a mold apparatus of an injection molder. The intermediate mold includes: a mold part 11 configured to conduct a mold open / close operation to an opposing mold from a stationary side mold and a movable side mold; a rotation frame body 110 configured to rotate with the mold part 11 by a rotation axis 200; a support part 12 supporting both sides of the rotation frame body 110 interposing shaft bodies 171 and 181; and a rotation drive part 19 configured to transmit a rotational force to the rotation frame body 110. The mold part 11 and the shaft bodies include a piping 300 configured to pass a fluid therethrough or a hollow part allowing an arrangement of electrical wiring. Both ends of the hollow part each form an inlet / outlet to / from which the piping 300 or the electrical wiring can be inserted / drawn out in a rotation axis direction of the shaft bodies.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 one in which an intermediate mold is disposed between a fixed mold and a movable mold. In addition, as the intermediate mold, there is one 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 attached to a rotating frame having a rotation axis, and rotates together with the rotating frame when it rotates. The rotating frame rotates by a rotational force obtained from a rotation drive unit constituted by a motor or the like. [Prior art documents] [Patent documents]

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

[0004] Since the storage space for storing the mold device including the intermediate mold in the injection molding machine is limited in size due to the size of the injection molding machine, there is a demand for storing the mold device including the intermediate mold in a compact manner. However, in the conventional intermediate mold, piping for supplying a fluid for cooling the mold and wiring for supplying power to sensors and the like are connected independently. In this case, the surroundings of the mold device become complicated, which hinders the mold device from being stored compactly.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to store a mold assembly including an intermediate mold in a compact manner in an injection molding machine. [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 the opposing mold of the fixed side mold and the movable side mold, a rotating frame body that rotates together with the mold section via a rotation shaft, support sections that support both sides of the rotating frame body via a shaft body, and a rotation drive section that transmits rotational force to the rotating frame body, wherein the mold section and the shaft body have hollow sections in which piping or electrical wiring for passing a fluid can be arranged, and both ends of the hollow section form entrances and exits that allow the piping or electrical wiring to enter and exit in the direction of the rotational axis of the shaft body. Here, the support portion may be formed with a recess that accommodates at least a portion of the rotation drive portion. The recess may be formed at a position shifted in a radial direction of the rotation shaft from an extension line of the rotation shaft. The recess may be formed at a position shifted upward in the vertical direction from an extension line of the rotation axis. The recess may house at least a part of a rotational force transmission mechanism of the rotation drive unit, which transmits a rotational force to the rotary frame. The rotational force transmission mechanism may be a gear mechanism that links a plurality of gears. A part of the rotation drive unit may be disposed on an extension of the rotation shaft. In addition, the shaft bodies may be attached to both sides of the rotating frame body in the rotational axis direction via bearings, and the piping may be arranged at the inlet / outlet of one of the shaft bodies, and the electrical wiring may be arranged at the inlet / outlet of the other shaft body. In addition, the shaft body may be attached to the top and bottom sides of the rotating frame body via bearings, and the support portion may support the top and bottom sides of the rotating frame body via the shaft body. In addition, the rotary drive unit may be connected to the top side of the rotary frame, and the piping or the electrical wiring may be arranged on a shaft attached to the bottom side of the rotary frame. 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 that performs mold opening and closing operations with the opposing mold of the fixed side mold and the movable side mold; a rotating frame that rotates together with the mold section via a rotation shaft; support sections that support both sides of the rotating frame via a shaft body; and a rotation drive section that transmits rotational force to the rotating frame body, wherein the mold section and the shaft body have hollow sections in which piping or electrical wiring for passing a fluid can be arranged, and both ends of the hollow section form entrances and exits that allow the piping or electrical wiring to enter and exit in the direction of the rotational axis of the shaft body. 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 of the fixed side mold and the movable side mold, a rotating frame that rotates together with the mold section by a rotation shaft, support sections that support both sides of the rotating frame via a shaft body, and a rotation drive section that transmits rotational force to the rotating frame body, wherein the mold section and the shaft body have hollow sections in which piping or electrical wiring for passing a fluid can be arranged, and both ends of the hollow section form entrances and exits through which the piping or electrical wiring can enter and exit in the direction of the rotational axis of the shaft body. Effect of the Invention

[0007] According to the present invention, the mold assembly including the intermediate mold can be stored compactly in the injection molding machine. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an example of the external configuration of an injection molding machine according to a first embodiment and a part of a mold device mounted on the injection molding machine; [Diagram 2] FIG. 2 is a cross-sectional view showing an example of a configuration of an intermediate mold of a mold device. [Diagram 3] FIG. 2 is a perspective view showing the state after the mold part has been removed from the intermediate mold. [Figure 4]2 is a perspective view showing an example of the external configuration of a first shaft portion, a second shaft portion, and a rotation drive portion. FIG. [Diagram 5] 1 is a perspective view showing the second shaft portion and the rotation drive portion when viewed from the bottom side toward the top side in the vertical direction. FIG. [Figure 6] FIG. 1 is a cross-sectional view showing an example of the configuration of an intermediate mold of a mold device mounted on a conventional injection molding machine. [Figure 7] 1. FIG. 4 is a cross-sectional view showing an example of the configuration of an intermediate mold of a mold device according to a second embodiment, which is mounted on the injection molding machine of FIG. [Figure 8] 1. FIG. 4 is a cross-sectional view showing an example of the configuration of an intermediate mold of a mold device according to a third embodiment, which is mounted on the injection molding machine of 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. <First embodiment> (Configuration of injection molding machine) FIG. 1 is a perspective view showing an example of the external configuration of an injection molding machine 100 according to the first embodiment and a part of a mold device 1 mounted on the injection molding machine 100. As shown in FIG. FIG. 2 is a cross-sectional view showing an example of the configuration of the intermediate mold 10 of the mold device 1. As shown in FIG. FIG. 3 is a perspective view showing a state after the mold part 11 has been removed from the intermediate mold 10. As shown in FIG. FIG. 4 is a perspective view showing an example of the external configuration of each of the first shaft portion 17, the second shaft portion 18, and the rotation drive portion 19. As shown in FIG.

[0010] The injection molding machine 100 shown in Fig. 1 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 has a storage space 40, and a mold device 1 is arranged in the storage space 40. 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 arranged 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) and FIG. 2, the intermediate mold 10 has a mold portion 11, a support portion 12, a first shaft portion 17, a second shaft portion 18, and a rotation drive portion 19. The mold section 11 has a rotating frame 110 and plates 115 and 116. The rotating frame 110 constituting the mold section 11 is a metal frame that rotates on a rotating shaft 200. The rotating frame 110 is composed of a first side portion 111, a second side portion 112, a top side portion 113, and a bottom side portion 114, which are metal plate members, and these are connected by bolts or the like to form a single frame. The plates 115 and 116 constituting the mold section 11 are multiple mold plates attached to the rotating frame 110.

[0013] Plates 115 are detachably attached to rotary frame 110 via members not shown, and are configured to rotate together with rotary frame 110 when rotary frame 110 rotates. In contrast, plates 116 are arranged inside rotary frame 110 and fixed to shafts 171 and 181 which do not rotate. Therefore, unlike plates 115, plates 116 are configured not to rotate.

[0014] In this embodiment, the rotating frame 110 is described as an assembly of a first side portion 111, a second side portion 112, a top portion 113, and a bottom portion 114, which are made of metal plate material (the boundaries between the various portions are not shown). However, the first side portion 111, the second side portion 112, the top portion 113, and the bottom portion 114 may be formed integrally or may be formed by assembling multiple parts.

[0015] In the region of the plates 116 where the rotating shaft 200 is located, a hollow portion 119 is formed in which piping for passing a fluid (liquid or gas) such as a refrigerant or electrical wiring can be arranged. The hollow portion 119 is a space formed in the non-rotating plates 116, and is connected to each of the hollow portion 201 of the non-rotating shaft body 171 and the hollow portion 202 of the non-rotating shaft body 181, forming a space that is not affected even when the rotating frame rotates. The diameter of the hollow portion 119 is approximately the same as the diameter of each of the hollow portions 201 and 202. This makes it difficult for a step to be formed at the boundary between the hollow portion 119 and the hollow portion 201 and the boundary between the hollow portion 119 and the hollow portion 202, and facilitates the work of arranging the piping and electrical wiring in the hollow portion 119.

[0016] A first shaft portion 17 is attached to a first side portion 111 of the rotating frame 110 via a bearing 117 formed of a bearing or the like. A second shaft portion 18 is attached to a second side portion 112 of the rotating frame 110 via a bearing 118 formed of a bearing or the like. In the mold section 11, when the rotating frame 110 rotates about a rotating shaft 200, the plates 115 rotate together with it and move while rotating between a position where injection molding is performed by a mold closing operation with the fixed mold 30 (see FIG. 1) and a position where blow molding is performed by a mold closing operation with the movable mold 20 (see FIG. 1).

[0017] The support section 12 has support members 13 to 16. As shown in FIG. 2 and FIG. 3, the support member 13 constituting the support section 12 is a member that supports the rotary frame 110 via a first shaft portion 17 attached to a first side portion 111 of the rotary frame 110. The support member 13 is provided with a through hole 131 that penetrates in the direction of the rotation axis. The through hole 131 forms a space for arranging the first shaft portion 17. The support member 13 is also provided with a through hole 132 that penetrates in the opening and closing direction. The through hole 132 is a through hole for sliding a tie bar (not shown) that guides the mold opening and closing operation between the intermediate mold 10 and the fixed mold 30 and the mold opening and closing operation between the intermediate mold 10 and the movable mold 20. The through hole 132 is formed near each end of the top side and the bottom side in the top-bottom direction of the support member 13.

[0018] As shown in FIG. 2 and FIG. 3, the support member 14 constituting the support section 12 is a member that supports the rotary frame 110 via the second shaft portion 18 attached to the second side portion 112 of the rotary frame 110. The support member 14 is provided with a through hole 141 that penetrates in the direction of the rotation axis. The through hole 141 forms a space for arranging the second shaft portion 18. The support member 14 is also provided with a through hole 142 that penetrates in the opening and closing direction. The through hole 142 is a through hole for sliding a tie bar (not shown) that guides the mold opening and closing operation between the intermediate mold 10 and the fixed mold 30 and the mold opening and closing operation between the intermediate mold 10 and the movable mold 20. The through hole 142 is formed near each end of the top side and the bottom side in the top-bottom direction of the support member 14.

[0019] As shown in FIG. 2, a recess 143, which is a portion recessed toward the first side of the support member 14, is formed on the second side surface 144 of the support member 14 at a position shifted toward the top from the extension line of the rotation shaft 200. The recess 143 is a recess that forms a space capable of accommodating at least a part of the rotation drive unit 19. In the example of FIG. 2, a part of the rotational force transmission unit 192 constituting the rotation drive unit 19 is accommodated in the recess 143. The recess 143 may be formed at a position shifted toward the bottom from the extension line of the rotation shaft 200, but it is preferable to form the recess 143 at a position shifted toward the top from the extension line of the rotation shaft 200 as in the example of FIG. 2. This is for the following reason.

[0020] That is, if recess 143 is formed at a position shifted toward the ground from the extension line of rotating shaft 200, rotation drive unit 19 will be disposed on the ground side of the extension line of rotating shaft 200. In this case, piping, which will be described later, will be disposed on the side where rotation drive unit 19 is not disposed, that is, on the upper side of the extension line of rotating shaft 200 or on the extension line of rotating shaft 200, and when fluid leaks from the piping, the probability of the fluid leaking toward the upper side increases due to the piping path and sagging compared to when the piping is disposed on the ground side of the extension line of rotating shaft 200.

[0021] The support member 15 constituting the support section 12 is a member arranged on the top side of the support members 13 and 14 as shown in Figs. 2 and 3. The support member 15 may be detachably connected to the support members 13 and 14 by bolts or the like, or may be joined by welding or the like. The support member 16 constituting the support section 12 is a member arranged on the bottom side of the support members 13 and 14 as shown in Figs. 1 to 3, and determines the position of the support members 13 and 14. The support member 16 may be detachably fixed to the support members 13 and 14 by bolts or the like, or may be joined by welding or the like. The support members 13 to 16 may also be integrally formed.

[0022] 2 to 4, the first shaft portion 17 has a shaft body 171, a first fixing member 172, a second fixing member 173, and a manifold 174. The shaft body 171 is a member that enables the rotating frame 110 to rotate by a rotating shaft 200 in a state where it is attached to the first side portion 111 of the rotating frame 110 via a bearing 117 of the rotating frame 110. The shaft body 171 is formed with a hollow portion 201 in which piping for passing a fluid (liquid or gas) such as a refrigerant or electrical wiring can be arranged.

[0023] At each of the first end and the second end of the shaft body 171, there are formed openings 211 and 212 for leading the piping or electrical wiring arranged in the hollow portion 201 to the outside of the shaft body 171. The openings 212 face the first end of a hollow portion 119 formed in the plates 116 of the mold part 11. Therefore, the space formed by the hollow portion 201 of the shaft body 171 and the space formed by the hollow portion 119 of the plates 116 are connected to each other.

[0024] First fixing member 172 is a member that fixes shaft body 171 in a state in which it penetrates second fixing member 173, and is joined to shaft body 171 and second fixing member 173 by welding or the like. Second fixing member 173 is fixed to the first side of support member 13 by a bolt or the like.

[0025] The manifold 174 is a box-shaped metal member for collecting or branching the piping arranged in the hollow portion 201 of the shaft body 171 and leading it to the outside of the intermediate mold 10. The manifold 174 is arranged so as to cover the inlet / outlet 211 at the first end portion of the shaft body 171 which penetrates the second fixing member 173. The manifold 174 is provided with a plurality of through holes (not shown) through which the piping leading to the outside from the inlet / outlet 211 at the first end portion of the shaft body 171 can be arranged.

[0026] 2 to 4, the second shaft portion 18 has a shaft body 181, a first fixing member 182, a second fixing member 183, and a manifold 184. The shaft body 181 is a member that enables the rotating frame 110 to rotate by a rotating shaft 200 in a state where it is attached to the second side portion 112 via a bearing 118 of the rotating frame 110. The shaft body 181 is formed with a hollow portion 202 in which piping for passing a fluid (liquid or gas) such as a refrigerant or electrical wiring can be arranged.

[0027] At the end of the first side and the end of the second side of the shaft body 181, there are formed respective inlets 221 and 222 for leading the piping or electrical wiring arranged in the hollow portion 202 to the outside of the shaft body 181. The inlet 221 faces the end of the second side of the hollow portion 119 formed in the plate 116 of the mold part 11. Therefore, the space formed by the hollow portion 202 of the shaft body 181 and the space formed by the hollow portion 119 of the plate 116 are connected. The first fixing member 182 is a member that fixes the shaft body 181 in a state in which the shaft body 181 is penetrated through the second fixing member 183, and is joined to the shaft body 181 and the second fixing member 183 by welding or the like. The second fixing member 183 is fixed to the second side surface 144 of the support member 14 by a bolt or the like.

[0028] 2 to 4, the manifold 184 is a box-shaped metal member for collecting or branching the piping arranged in the hollow portion 202 of the shaft body 181 and leading it to the outside of the intermediate mold 10. The manifold 184 is arranged so as to cover the inlet / outlet 222 at the second end of the shaft body 181 which penetrates the second fixing member 183. The manifold 184 is provided with a plurality of through holes 189 through which the piping extending from the second end of the shaft body 181 can be arranged.

[0029] As shown in FIG. 2 to FIG. 4, the rotation drive unit 19 has a rotation force generating unit 191 that generates a rotation force and a rotation force transmitting unit 192 that transmits the rotation force generated by the rotation force generating unit 191 to the rotary frame 110, and rotates the rotary frame 110. The rotation force generating unit 191 is composed of a motor or the like. The rotation force transmitting unit 192 is composed of a gear box or the like including a plurality of gears, shafts, bearings, or the like. In the rotation drive unit 19, the rotation force of the rotation force generating unit 191 is transmitted to the second side portion 112 of the rotary frame 110 by the rotation force transmitting unit 192 as a rotation force transmitting mechanism, and rotates the rotary frame 110. In the rotation drive unit 19 according to the first embodiment, a part of the rotation force transmitting unit 192 is housed in the recess 143 of the support member 14, and the other part is arranged so as to be exposed from the recess 143 to the second side.

[0030] FIG. 5 is a perspective view showing the second shaft portion 18 and the rotary drive portion 19 when viewed from the bottom side toward the top side in the vertical direction. 2, a hollow portion 202 in which piping or electrical wiring can be arranged is formed in the shaft body 181 of the second shaft portion 18. The piping or electrical wiring passing through the hollow portion 202 is arranged to exit to the outside of the intermediate mold 10 via an inlet / outlet 222 at the end portion on the second side of the shaft body 181 and the manifold 184. As an example, FIG. 5 shows a state in which piping 300 exits to the outside of the intermediate mold 10 via the manifold 184.

[0031] In the example of Fig. 5, a plurality of through holes 189 are provided in each of a surface 185 on a second side in the rotation axis direction, a surface 186 on a third side in the opening / closing direction, a surface 187 on a fourth side in the opening / closing direction, and a surface 188 on the ground side in the top-to-bottom direction of the manifold 184. Specifically, four through holes 189 are provided in the surface 188 on the ground side in the top-to-bottom direction of the manifold 184, and pipes 300 are arranged in each of three of the through holes 189. All of these pipes 300 extend toward the ground side. Note that the arrangement of the through holes 189 and the pipes 300 of the manifold 184 shown in Fig. 5 is merely an example.

[0032] FIG. 6 is a cross-sectional view showing an example of the configuration of an intermediate mold of a mold assembly mounted on a conventional injection molding machine. Fig. 6 shows a specific example of a conventional intermediate die having a rotary frame to which plates of the die are attached, a shaft attached via bearings to each of the first and second sides of the rotary frame in the rotation axis direction, a support frame to which the shaft is fixed, and a motor to apply a rotational force to the shaft via a connecting part. The rotation axis shown in Fig. 6 is in the same direction as the rotation axis 200 in Fig. 2 described above.

[0033] The intermediate mold 10 according to the first embodiment shown in Fig. 2 described above is configured such that piping and electrical wiring are arranged in hollow portions 119, 201, and 202 formed to communicate with plates 116, shaft body 171, and shaft body 181, which do not rotate even when the rotary frame 110 rotates. For this reason, for example, a configuration can be adopted in which piping or electrical wiring arranged in hollow portion 201 of shaft body 171 is led out from an inlet / outlet 211 to the outside via manifold 174, and piping or electrical wiring arranged in hollow portion 202 of shaft body 181 is led out from an inlet / outlet 222 at the end portion on the second side of shaft body 181 to the outside via manifold 184. This makes it possible to compactly store the mold device in the storage space of the injection molding machine.

[0034] In contrast, the conventional intermediate mold shown in Fig. 6 cannot have the above-mentioned configuration, and therefore pipes for supplying fluid for cooling the mold, wiring for supplying power to sensors, etc., are connected independently, which results in a complicated surroundings of the mold device, making it difficult to store the mold device compactly in the storage space of the injection molding machine.

[0035] In summary, the intermediate mold, mold device, and injection molding machine to which the first embodiment of the present invention is applied only need to have the following configurations, and can take a variety of different embodiments. That is, the intermediate mold 10 of the first 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 11 that performs mold opening and closing operations with the opposing mold between the fixed side mold 30 and the movable side mold 20, a rotating frame body 110 that rotates together with the mold section 11 by a rotating shaft 200, a support section 12 that supports both sides of the rotating frame body 110 via shaft bodies 171 and 181, and a rotation drive section 19 that transmits rotational force to the rotating frame body 110, and the mold section 11 and the shaft body (e.g., shaft body 181) have a hollow section (e.g., hollow section 202) in which piping 300 for passing a fluid or electrical wiring can be arranged, and both ends of the hollow section form entrances and exits (e.g., entrances and exits 221 and 222) through which the piping 300 or electrical wiring can enter and exit in the direction of the rotational axis of the shaft body.

[0036] This allows the piping 300 or electrical wiring to be arranged in the hollow portion (e.g., hollow portion 202) of the non-rotating mold part 11 and shaft body (e.g., shaft body 181), thereby eliminating clutter around the mold apparatus 1. As a result, the mold apparatus 1 including the intermediate mold 10 can be stored compactly in the storage space 40 of the injection molding machine 100. Furthermore, the piping 300 or electrical wiring can be routed out from the side where the rotation drive unit 19 is arranged.

[0037] Here, the support member 14 of the support section 12 may be formed with a recess 143 for accommodating at least a part of the rotation drive section 19 . As a result, at least a part of the rotation drive unit 19 is stored in the recess 143 of the support member 14, so that the size of the mold apparatus 1 including the intermediate mold 10 in the rotation axis direction can be made smaller than when at least a part of the rotation drive unit 19 is not stored in the recess 143 of the support part 12. As a result, the mold apparatus 1 including the intermediate mold 10 can be stored compactly in the storage space 40 of the injection molding machine 100.

[0038] Moreover, the recess 143 may be formed at a position shifted in the radial direction of the rotating shaft 200 from the extension line of the rotating shaft 200 . As a result, at least a part of the rotation drive unit 19 is stored in the recess 143 formed at a position shifted in the radial direction of the rotation shaft 200 from the extension line of the rotation shaft 200, so that at least a part of the rotation drive unit 19 is arranged in parallel rather than in series with respect to the shaft body 181. As a result, compared to the case where at least a part of the rotation drive unit 19 is arranged in series with respect to the shaft body 181, the size in the rotation axis direction of the mold device 1 including the intermediate mold 10 can be made smaller, so that it can be stored compactly in the storage space 40 of the injection molding machine 100.

[0039] Moreover, the recess 143 may be formed at a position shifted upward from the extension line of the rotation shaft 200 in the vertical direction. With this, at least a part of the rotary drive unit 19 is disposed on the upper side with respect to the shaft body 181, so that the piping 300 can be extended to the lower side where the rotary drive unit 19 is not disposed. As a result, when a fluid leaks from the piping 300, the probability that the fluid will leak toward the upper side due to the path and sagging of the piping 300 can be reduced.

[0040] In addition, the recess 143 may house at least a part of a rotational force transmission section 192 of the rotation drive section 19 that transmits the rotational force to the rotary frame 110. As a result, at least a part of the rotational force transmission unit 192 is stored in the recess 143, so that at least a part of the rotational force transmission unit 192 is arranged in parallel, not in series, to the rotational shaft 200. As a result, the size of the mold device 1 including the intermediate mold 10 in the rotational axis direction can be made smaller than when at least a part of the rotational force transmission unit 192 is arranged in series to the rotational shaft 200, so that the mold device 1 can be stored compactly in the storage space 40 of the injection molding machine 100.

[0041] The rotational force transmission mechanism may be a gear mechanism that links a plurality of gears. This allows the size of the rotational force transmission mechanism to be smaller than when the rotational force transmission mechanism is a belt mechanism rather than a gear mechanism, for example. As a result, the space formed by the recess 143 can be made smaller (the recess in the support member 14 can be made smaller), so that the strength of the support member 14 in which the recess 143 is formed can be ensured.

[0042] In addition, the shaft bodies 171 and 181 may be attached via bearings to both sides of the rotating frame body 110 in the direction of the rotational axis, with piping 300 arranged at the inlet / outlet 222 of one shaft body 181 and electrical wiring arranged at the inlet / outlet 211 of the other shaft body 171. As a result, even if the rotation drive unit 19 is connected to the shaft body 181 , the piping 300 can be arranged on the same side as the rotation drive unit 19 , and the electrical wiring can be arranged on a different side from the rotation drive unit 19 .

[0043] The present invention also relates to a mold apparatus 1 for an injection molding machine 100, characterized in that an intermediate mold 10 arranged between a fixed side mold 30 and a movable side mold 20 comprises a mold section 11 which performs mold opening and closing operations with the opposing mold of the fixed side mold 30 and the movable side mold 20, a rotating frame 110 which rotates together with the mold section 11 by a rotation shaft 200, a support section 12 which supports both sides of the rotating frame 110 via shafts 171 and 181, and a rotation drive section 19 which transmits rotational force to the rotating frame 110, and the mold section 11 and the shaft (e.g., shaft 181) have a hollow section (e.g., hollow section 202) in which piping 300 for passing a fluid or electrical wiring can be arranged, and both ends of the hollow section form entrances and exits (e.g., entrances and exits 221 and 222) through which the piping 300 or electrical wiring can enter and exit in the direction of the rotation axis of the shaft.

[0044] This allows the piping 300 or electrical wiring to be arranged in the hollow portion (e.g., hollow portion 202) of the non-rotating mold part 11 and shaft body (e.g., shaft body 181), thereby eliminating clutter around the mold apparatus 1. As a result, the mold apparatus 1 including the intermediate mold 10 can be stored compactly in the storage space 40 of the injection molding machine 100. Furthermore, the piping 300 or electrical wiring can be routed out from the side where the rotation drive unit 19 is arranged.

[0045] The present invention also relates to an injection molding machine 100 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 provided with a mold section 11 which performs mold opening and closing operations with the opposing mold of the fixed side mold 30 and the movable side mold 20, a rotating frame 110 which rotates together with the mold section 11 by a rotating shaft 200, support sections 12 which support both sides of the rotating frame 110 via shafts 171 and 181, and a rotation drive section 19 which transmits rotational force to the rotating frame 110, in which the mold section 11 and the shaft (e.g., shaft 181) have a hollow section (e.g., hollow section 202) in which piping 300 for passing a fluid or electrical wiring can be arranged, and both ends of the hollow section form entrances and exits (e.g., entrances and exits 221 and 222) through which the piping 300 or electrical wiring can enter and exit in the direction of the rotation axis of the shaft.

[0046] This allows the piping 300 or electrical wiring to be arranged in the hollow portion (e.g., hollow portion 202) of the non-rotating mold part 11 and shaft body (e.g., shaft body 181), thereby eliminating clutter around the mold apparatus 1. As a result, the mold apparatus 1 including the intermediate mold 10 can be stored compactly in the storage space 40 of the injection molding machine 100. Furthermore, the piping 300 or electrical wiring can be routed out from the side where the rotation drive unit 19 is arranged.

[0047] <Second embodiment> Fig. 7 is a cross-sectional view showing an example of the configuration of an intermediate mold 50 of a mold device according to a second embodiment, which is mounted on the injection molding machine 100 of Fig. 1. In Fig. 7, the back side of the drawing corresponds to the third side in the opening / closing direction of Fig. 1, and the front side of the drawing corresponds to the fourth side in the opening / closing direction of Fig. 1. As shown in FIG. 7, the intermediate mold 50 has a mold portion 51, a support portion 52, a first shaft portion 57, a second shaft portion 58, and a rotation drive portion 59.

[0048] The mold section 51 has a rotary frame 510, plates 516, and plates not shown. The rotary frame 510 constituting the mold section 51 is a metal frame that rotates on a rotary shaft 600. The rotary frame 510 is composed of a first side portion 511, a second side portion 512, a top side portion 513, and a bottom side portion 514, which are connected by bolts or the like to form a single frame. The plates 516 constituting the mold section 51 and plates not shown are plates of a plurality of molds attached to the rotary frame 510.

[0049] The plates (not shown) are detachably attached to the rotary frame 510 via members (not shown), and are configured to rotate together with the rotary frame 510 when the rotary frame 510 rotates. In contrast, the plates 516 are fixed to non-rotating shafts 571 and 581 while being disposed inside the rotary frame 510. Therefore, unlike the plates 115, the plates 516 are configured not to rotate. A hollow portion 519 is formed in the portion of the plates 516 through which the rotary shaft 600 passes, allowing the placement of piping for passing a fluid (liquid or gas) such as a refrigerant or electrical wiring.

[0050] In this embodiment, the rotating frame 510 is described as being assembled from a first side portion 511, a second side portion 512, a top portion 513, and a bottom portion 514, which are made of metal plate material (the boundaries between the various portions are not shown). However, the first side portion 511, the second side portion 512, the top portion 513, and the bottom portion 514 may be formed integrally or may be formed by assembling a plurality of parts.

[0051] The support section 52 has support members 53 to 56. The support member 54 constituting the support section 52 is a member that supports the mold section 51 via a second shaft section 58 attached to the second side of the mold section 51. A recess 543 is formed on the second side of the support member 54 at a position shifted upward from an extension line of the rotation shaft 600. The recess 543 is a recess that forms a space capable of accommodating at least a part of the rotation drive section 59.

[0052] The first shaft portion 57 has a shaft body 571, a first fixing member 572, a second fixing member 573, and a manifold 574. The shaft body 571 is a member that allows the rotary frame 510 to rotate by a rotary shaft 600 in a state where the shaft body 571 is attached to the first side portion 511 via a bearing 517 of the rotary frame 510. The shaft body 571 is formed with a hollow portion 601 in which a piping or an electric wiring for passing a fluid (liquid or gas) such as a refrigerant can be arranged. The first end and the second end of the shaft body 571 are each formed with an inlet / outlet 611 and an outlet / inlet 612 for leading the piping or the electric wiring arranged in the hollow portion 601 to the outside of the shaft body 571. The inlet / outlet 612 faces the first end of the hollow portion 519 formed in the plate 516 of the mold portion 51. For this reason, the space formed by hollow portion 601 of shaft body 571 and the space formed by hollow portion 519 of plates 516 are connected to each other. First fixing member 572 is a member that fixes shaft body 571 in a state in which shaft body 571 penetrates second fixing member 573, and is joined to shaft body 571 and second fixing member 573 by welding or the like. Second fixing member 573 is fixed to the first side of support member 53 by a bolt or the like.

[0053] Manifold 574 is a box-shaped metal member for collecting or branching the piping arranged in hollow portion 601 of shaft body 571 and leading it to the outside of intermediate mold 50. Manifold 574 is arranged so as to cover inlet / outlet 611 at the first end portion of shaft body 571 which penetrates second fixing member 573. Manifold 574 is provided with a plurality of through holes (not shown) through which the piping extending from the first end portion of shaft body 571 can be arranged.

[0054] The second shaft portion 58 has a shaft body 581, a first fixing member 582, a second fixing member 583, and a manifold 584. The shaft body 581 is a member that enables the rotating frame 510 to rotate by a rotating shaft 600 in a state where it is attached to the second side portion 512 via a bearing 518 of the rotating frame 510. The shaft body 581 is formed with a hollow portion 602 in which piping for passing a fluid (liquid or gas) such as a refrigerant or electrical wiring can be arranged.

[0055] At the end of the first side and the end of the second side of the shaft body 581, there are formed openings 621 and 622 for leading the piping or electrical wiring arranged in the hollow portion 602 to the outside of the shaft body 581. The openings 621 face the end of the second side of the hollow portion 519 formed in the plate 516 of the mold part 51. Therefore, the space formed by the hollow portion 602 of the shaft body 581 and the space formed by the hollow portion 519 of the plate 516 are connected to each other. The first fixing member 582 is a member that fixes the shaft body 581 in a state where the shaft body 581 is penetrated through the second fixing member 583, and is joined to the shaft body 581 and the second fixing member 583 by welding or the like. The second fixing member 583 is fixed to the second side of the support member 54 by a bolt or the like.

[0056] Manifold 584 is a box-shaped metal member for collecting or branching the piping arranged in hollow portion 602 of shaft body 581 and leading it to the outside of intermediate mold 50. Manifold 584 is arranged so as to cover inlet / outlet 622 at the second end portion of shaft body 581 which penetrates second fixing member 583. Manifold 584 is provided with a plurality of through holes (not shown) through which the piping extending from the second end portion of shaft body 581 can be arranged.

[0057] The rotation drive unit 59 has a rotation force generating unit 591 that generates a rotation force and a rotation force transmitting unit 592 that transmits the rotation force generated by the rotation force generating unit 591 to the rotary frame 510, and rotates the rotary frame 510. The rotation force generating unit 591 is composed of a motor or the like. The rotation force transmitting unit 592 is composed of a gear box or the like including a plurality of gears, shafts, bearings, or the like. In the rotation drive unit 59 according to the second embodiment, a part of the rotation force transmitting unit 592 is housed in the recess 543, and the remaining part of the rotation force transmitting unit 592 includes a part that is disposed so as to protrude from the recess 543 to the second side, and a part that is disposed on an extension line of the rotary shaft 600 together with the rotation force generating unit 591.

[0058] In the rotation drive unit 59, the rotational force of the rotational force generating unit 591 is transmitted to the rotating frame 510 via a rotational force transmitting unit 592 serving as a rotational force transmitting mechanism, thereby rotating the rotating frame 510. In the example of Fig. 7, the rotational force of the rotational force generating unit 591 arranged on an extension of the rotation shaft 600 is transmitted to the rotating frame 510 via a portion of the rotational force transmitting unit 592 arranged on an extension of the rotation shaft 600, a portion arranged to protrude from the recess 543 to the second side, and a portion housed in the recess 543, thereby rotating the mold unit 51.

[0059] Other configurations of the mold portion 51, support portion 52, first shaft portion 57, and second shaft portion 58 shown in Figure 7 are similar to the configurations of the mold portion 11, support portion 12, first shaft portion 17, and second shaft portion 18 shown in Figure 2 above, and so description thereof will be omitted.

[0060] In summary, the intermediate mold, mold device, and injection molding machine to which the second embodiment of the present invention is applied only need to have the following configurations, and can take a variety of different embodiments. That is, the intermediate mold 50 of the second 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 characterized in that it comprises a mold section 51 that performs mold opening and closing operations with the opposing mold between the fixed side mold 30 and the movable side mold 20, a rotating frame body 510 that rotates together with the mold section 51 by a rotating shaft 600, a support section 52 that supports both sides of the rotating frame body 510 via shaft bodies 571 and 581, and a rotation drive section 59 that transmits rotational force to the rotating frame body 510, and the mold section 51 and the shaft body (e.g., shaft body 581) have a hollow section (e.g., hollow section 602) in which piping or electrical wiring for passing a fluid can be arranged, and both ends of the hollow section form entrances and exits (e.g., entrances and exits 621 and 622) through which the piping or electrical wiring can enter and exit in the direction of the rotational axis of the shaft body. Here, a part of the rotation drive unit 59 may be disposed on an extension line of the rotation axis 600 . This allows a part of the rotation drive unit 59 to be disposed on an extension of the rotation shaft 600, and the remainder to be disposed at a position offset from the extension of the rotation shaft 600. As a result, the size of the mold device 1 including the intermediate mold 50 in the rotation shaft direction can be made smaller than when the entire rotation drive unit 59 is disposed on an extension of the rotation shaft 600, so that the mold device 1 can be stored compactly in the storage space 40 of the injection molding machine 100. Furthermore, piping or electrical wiring can be routed from the side where the rotation drive unit 59 is disposed.

[0061] <Third embodiment> Fig. 8 is a cross-sectional view showing an example of the configuration of an intermediate mold 70 of a mold device according to a third embodiment, which is mounted on the injection molding machine 100 of Fig. 1. The short side direction of the intermediate mold 70 in Fig. 8 is the same direction as the opening and closing direction in Fig. 1, the back side of Fig. 8 is the third side in the opening and closing direction in Fig. 1, and the front side of Fig. 8 is the fourth side in the opening and closing direction in Fig. 1. 8 has a mold part 71, a support part 72, shafts 77 and 78, and a rotation drive part 79. The mold part 71 has a rotary frame 710 and plates 716. The support part 72 has support members 73 to 76.

[0062] The rotary frame 710 in the mold section 71 is a metallic frame that rotates around a rotary shaft 800. The rotary frame 710 is made up of a first side portion 711, a second side portion 712, a top side portion 713, and a bottom side portion 714, which are metallic plate members, and these are connected with bolts or the like to form a single frame. Plates 716 and other plates (not shown) are attached to the rotary frame 710. The plates 716 are configured not to rotate. In contrast, the plates (not shown) are configured to rotate together with the rotary frame 710 when it rotates.

[0063] A shaft 77 is attached to a top side portion 713 of the rotating frame 710 via a bearing 717 formed of a bearing or the like. A shaft 78 is attached to a bottom side portion 714 of the rotating frame 710 via a bearing 718 formed of a bearing or the like. In the mold section 71, when the rotating frame 710 rotates on a rotating shaft 800, plates (not shown) attached to the rotating frame 710 rotate accordingly, and move while rotating between a position where injection molding is performed by closing the fixed mold 30 (see FIG. 1) and a position where blow molding is performed by closing the movable mold 20 (see FIG. 1).

[0064] The support member 73 in the support portion 72 is provided with a through hole 731 penetrating in the opening and closing direction. The through hole 731 is a through hole for sliding a tie bar (not shown) that guides the mold opening and closing operation between the intermediate mold 70 and the fixed mold 30 and the mold opening and closing operation between the intermediate mold 70 and the movable mold 20. The through hole 731 is formed near each end of the top side and the bottom side in the top-bottom direction of the support member 73.

[0065] The support member 74 in the support section 72 is provided with a through hole 741 penetrating in the opening and closing direction. The through hole 741 is a through hole for sliding a tie bar (not shown) that guides the mold opening and closing operation between the intermediate mold 70 and the fixed mold 30 and the mold opening and closing operation between the intermediate mold 70 and the movable mold 20. The through hole 741 is formed near each end of the top side and the bottom side in the top-bottom direction of the support member 74.

[0066] The support member 75 in the support section 72 is a member arranged on the top side of the support members 73 and 74. The support member 75 has a fixing member 751, and fixes a shaft body 77 attached to the top side section 713 of the rotary frame body 710 via a bearing 717. The support member 75 may be detachably connected to the support members 73 and 74 by bolts or the like, or may be joined by welding or the like. A recess 753 is formed in a surface 752 on the top side of the support member 75. The recess 753 forms a space capable of accommodating a part of the rotary drive section 79.

[0067] Support member 76 in support section 72 is a member arranged on the bottom side of support members 73 and 74, and determines the position of support member 73 and support member 74. Support member 76 has a fixing member 761, and supports rotating frame 710 via a shaft body 78 attached to bottom portion 714 of rotating frame 710. Support member 76 may be detachably fixed to support members 73 and 74 by bolts or the like, or may be joined by welding or the like. Support member 76 is provided with a through hole 762 for passing piping 300 therethrough.

[0068] The shaft body 77 is a member that allows the rotary frame body 710 to rotate on the rotary shaft 800 when attached to the top side part 713 of the rotary frame body 710 via a bearing 717. The shaft body 77 is fixed to the support member 75 by a fixing member 751 of the support member 75 of the support part 72. The shaft body 78 is a member that allows the rotary frame body 710 to rotate on the rotary shaft 800 when attached to the bottom side part 714 of the rotary frame body 710 via a bearing 718. The shaft body 78 is fixed to the support member 76 by a fixing member 761 of the support member 76 of the support part 72. The shaft body 78 is formed with a hollow part 802 in which the piping 300 and the electrical wiring can be arranged, and entrances 821 and 822 for the piping 300 and the electrical wiring. 8, the piping 300 disposed in the hollow portion 802 is disposed so as to protrude to the outside of the intermediate mold 70 via an inlet / outlet 822 formed at the bottom end of the shaft body 78 and a through-hole 762 of the support member 76. The piping 300 protruding to the outside of the intermediate mold 70 is connected to various devices (e.g., a device for controlling the circulation of the refrigerant) constituting the injection molding machine 100.

[0069] The rotation drive unit 79 has a rotational force generating unit 791 that generates a rotational force, and a rotational force transmitting unit 792 that transmits the rotational force generated by the rotational force generating unit 791 to the rotating frame 710, and rotates the rotating frame 710. The rotational force generating unit 791 is constituted by a motor or the like. The rotational force transmitting unit 792 is constituted by a gear box or the like.

[0070] In the rotation drive unit 79, the rotational force of the rotational force generating unit 791 is transmitted to the rotating frame 710 via a rotational force transmitting unit 792 serving as a rotational force transmitting mechanism, thereby rotating the rotating frame 710. The rotational force generating unit 791 is constituted by a motor or the like. The rotational force transmitting unit 792 is constituted by a gear box or the like. In the rotation drive unit 79, the rotational force of the rotational force generating unit 791 is transmitted to the rotating frame 710 by the rotational force transmitting unit 792 serving as a rotational force transmitting mechanism, thereby rotating the rotating frame 710. That is, the rotational force transmitting unit 792 rotates the rotating frame 710 by converting the rotational direction of the rotation shaft 900 of the rotational force generating unit 791 into the rotational direction of the rotation shaft 800.

[0071] Of the rotation drive unit 79 according to the third embodiment, a rotational force generating unit 791 is disposed at a position shifted toward the first side from a rotation axis 800 on an upper surface 752 of a support member 75, and a rotational force transmitting unit 792 is disposed on an extension line of the rotation axis 800. Specifically, the rotational force generating unit 791 is disposed with a portion of it housed in a recess 753 formed in the upper surface 752 of the support member 75.

[0072] In summary, the intermediate mold, mold device, and injection molding machine to which the third embodiment of the present invention is applied only need to have the following configurations, and various different embodiments can be adopted. That is, the intermediate mold 70 of the first 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 characterized in that it comprises a mold section 71 that performs mold opening and closing operations with the opposing mold between the fixed side mold 30 and the movable side mold 20, a rotating frame body 710 that rotates together with the mold section 71 by a rotation shaft 800, support sections 72 that support both sides of the rotating frame body 710 via shaft bodies 77 and 78, and a rotation drive section 79 that transmits rotational force to the rotating frame body 710, and the mold section 71 and the shaft body 78 have a hollow section 802 in which piping 300 for passing a fluid or electrical wiring can be arranged, and both ends of the hollow section 781 form entrances and exits 821 and 822 through which the piping 300 or electrical wiring can enter and exit in the direction of the rotational axis of the shaft body. Here, shaft bodies 77 and 78 are attached to the top and bottom sides, respectively, of rotating frame body 710 in the vertical direction, and support portion 72 may support the top and bottom sides of rotating frame body 710 via shaft bodies 77 and 78. This allows the vertical size of the intermediate mold 70, in which the rotating frame 710 is rotated by the rotation axis 800 extending in the vertical direction, to be reduced, so that the mold device 1 including the intermediate mold 70 can be stored compactly in the storage space 40 of the injection molding machine 100.

[0073] Furthermore, a rotary drive unit 79 may be connected to the top side of the rotary frame 710, and piping 300 or electrical wiring may be arranged on a shaft 78 attached to the bottom side of the rotary frame 710. This allows the piping to extend to the ground side where the rotary drive unit 79 is not located. As a result, when fluid leaks from the piping, the probability that the fluid will leak toward the ceiling side due to the piping path and sagging can be reduced.

[0074] <Modification> The above-mentioned first to third embodiments may or may not be modified as follows. For example, in the first and second embodiments described above, a part of the rotational force transmission part of the rotation drive part is accommodated in the recess of the support member, but this is not limited thereto. The whole of the rotational force transmission part may be accommodated in the recess of the support member. Also, a part or the whole of the rotational force generation part may be accommodated in the recess of the support member. Here, the recess 753 formed in the support part 72 according to the third embodiment shown in FIG. 8 described above is not deep enough to accommodate the whole of the rotational force generation part 791. However, if the length of the support part 72 in the vertical direction is longer than the length of the rotational force generation part 791 in the vertical direction, a part or the whole of the rotational force generation part 791 may be accommodated in the recess.

[0075] In the above-mentioned first to third embodiments, a gear mechanism including a gear box made of multiple gears is used as a rotational force transmission mechanism for transmitting the rotational force of the rotational force generating unit to the shaft body, but this is not limited to this. For example, a mechanism consisting of one or more belts and one or more pulleys that are disk-shaped members for transmitting the rotational force from the belts to the rotating shaft (hereinafter referred to as a "belt mechanism") may be used as the rotational force transmission mechanism.

[0076] Comparing the gear mechanism and the belt mechanism, the gear mechanism transmits the rotational force by mechanically meshing gears, while the belt mechanism transmits the rotational force by utilizing the frictional force between the belt and the pulley. For this reason, the belt mechanism may experience slippage between the belt and the pulley, resulting in a loss in the transmission of the rotational force. However, even if a problem occurs during the power transmission process, the belt mechanism can smoothly absorb the effect to some extent, so it can be said to be superior in terms of drive stability. In addition, the gear mechanism is superior to the belt mechanism in terms of strength. Note that some belt mechanisms have teeth formed on the belt side meshing with teeth formed on the pulley side, but they are not as strong as the gears of the gear mechanism.

[0077] In addition, a gear mechanism and a belt mechanism may be used together as the rotational force transmission mechanism. For example, when a belt mechanism is stored in a recess of a support member, it is necessary to wrap the belt around both the transmitting side and the receiving side of the rotational force, so the size of the recess must be larger than when a gear mechanism is stored in the recess. For this reason, it is preferable that the part stored in the recess is a gear mechanism and the part not stored in the recess is a belt mechanism. Note that the gear mechanism and the belt mechanism may be stored in one box to integrate the rotational force transmission mechanism, or they do not have to be stored in one box.

[0078] 7, for example, since the axis of the rotational force generating unit 591 and the axis of the rotational force transmitting unit 592 are misaligned, it is preferable to use a gear mechanism and a belt mechanism in combination as the rotational force transmitting unit 592. In this case, by arranging the gear mechanism in the recess 543, the intermediate die 50 can be made compact, and by arranging the belt mechanism outside the recess 543, the effects of troubles that may occur in the process of power transmission can be smoothly absorbed.

[0079] In the first and second embodiments described above, the rotary drive unit is disposed on the second side in the direction of the rotary shaft, but this is not limiting. The rotary drive unit may be disposed on the first side in the direction of the rotary shaft. That is, the side on which the rotary drive unit is disposed may be determined according to the position of the operation panel (not shown) in the injection molding machine 100 in FIG. 1 or the ease of operation for the operator. [Explanation of symbols]

[0080] Reference Signs List 1... mold device, 10... intermediate mold, 11, 51, 71... mold section, 12, 52, 72... support section, 13, 14, 15, 16... support member, 17, 57... first shaft section, 18, 58... second shaft section, 19... rotation drive section, 20... fixed side mold, 30... movable side mold, 100... injection molding machine, 200, 600, 800, 900... rotating shaft, 119, 201, 202, 519, 601, 602, 802... hollow section

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 an opposing mold of the fixed mold and the movable mold; A rotary frame that rotates together with the mold portion by a rotary shaft; a support portion that supports both sides of the rotary frame via a shaft body; A rotation drive unit that transmits a rotational force to the rotary frame; Equipped with the mold part and the shaft body have a hollow part in which a pipe for passing a fluid or an electric wiring can be arranged, The hollow portion is characterized in that both ends thereof form an entrance / exit through which the piping or the electrical wiring can enter and exit in the direction of the rotation axis of the shaft body. Intermediate mold.

2. The support portion is formed with a recess for accommodating at least a part of the rotation drive portion. The intermediate mold according to claim 1 .

3. The recess is formed at a position shifted in a radial direction of the rotation shaft from an extension line of the rotation shaft. The intermediate mold according to claim 2 .

4. The recess is formed at a position shifted upward in the vertical direction from an extension line of the rotation axis.

4. The intermediate mold according to claim 3.

5. The recessed portion accommodates at least a part of a rotational force transmission mechanism of the rotation drive portion, the rotational force transmission mechanism transmitting the rotational force to the rotary frame.

5. The intermediate mold according to claim 4.

6. The rotational force transmission mechanism is a gear mechanism that interlocks a plurality of gears. The intermediate mold according to claim 5.

7. A part of the rotation drive unit is disposed on an extension line of the rotation shaft. The intermediate mold according to claim 1 .

8. the shaft body is attached to both sides of the rotary frame body in the rotation axis direction via bearings, The piping is disposed at the inlet / outlet of one of the shaft bodies, and the electrical wiring is disposed at the inlet / outlet of the other of the shaft bodies. The intermediate mold according to claim 1 .

9. The shaft body is attached to the top side and the bottom side of the rotating frame body via bearings, The support portion supports the top side and the bottom side of the rotary frame body via the shaft body. The intermediate mold according to claim 1 .

10. The rotary drive unit is connected to a top side of the rotary frame, and the piping or the electrical wiring is disposed on a shaft body attached to a bottom side of the rotary frame.

10. The intermediate mould according to claim 9.

11. 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 an opposing mold of the fixed mold and the movable mold; A rotary frame that rotates together with the mold portion by a rotary shaft; a support portion that supports both sides of the rotary frame via a shaft body; A rotation drive unit that transmits a rotational force to the rotary frame; Equipped with the mold part and the shaft body have a hollow part in which a pipe for passing a fluid or an electric wiring can be arranged, The hollow portion is characterized in that both ends thereof form an entrance / exit through which the piping or the electrical wiring can enter and exit in the direction of the rotation axis of the shaft body. Mold equipment.

12. 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 an opposing mold of the fixed mold and the movable mold; A rotary frame that rotates together with the mold portion by a rotary shaft; a support portion that supports both sides of the rotary frame via a shaft body; A rotation drive unit that transmits a rotational force to the rotary frame; Equipped with the mold part and the shaft body have a hollow part in which a pipe for passing a fluid or an electric wiring can be arranged, The hollow portion is characterized in that both ends thereof form an entrance / exit through which the piping or the electrical wiring can enter and exit in the direction of the rotation axis of the shaft body. Injection molding machine.

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