Intermediate mold, mold apparatus and injection molder

Abstract

To downsize a mold apparatus including an intermediate mold.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 support part 12 houses at least part of the rotation drive part 19.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 space for storing the mold assembly 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 a compact size of the mold assembly including the intermediate mold. However, the conventional intermediate mold adopts a method of connecting the rotary drive unit in series to the rotary frame. In this case, the entire rotary drive unit is arranged on the extension line of the rotation axis of the rotary frame, which hinders the compact size of the mold assembly.

[0005] An object of the present invention is to make a die apparatus including an intermediate die more compact. [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 is characterized in that it comprises a mold section that performs mold opening and closing operations with the opposing mold between the fixed side mold and the movable side mold, a rotating frame that rotates together with the mold section via a rotation shaft, a support section that supports both sides of the rotating frame via a shaft body, and a rotational drive section that transmits rotational force to the rotating frame, wherein the support section houses at least a portion of the rotational drive section. 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. The shaft may have a hollow portion in which a pipe for passing a fluid can be disposed. In addition, both ends of the hollow portion may form an entrance / exit through which the piping can enter and exit in the direction of the rotation axis of the shaft body. In addition, the shaft body may be attached to both sides of the rotating frame in the rotational axis direction via bearings, and the rotation drive unit and the piping may be arranged on one side of the shaft body. In addition, the shaft body may be attached via bearings to both sides in the top and bottom direction of the rotating frame body, and the support portion may support the top and bottom sides of the rotating frame body via the shaft body. The rotary drive unit may be connected to the top side of the rotary frame, and a pipe for passing a fluid may be disposed 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, which is characterized in that an intermediate mold arranged between a fixed side mold and a movable side mold 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, a support section that supports both sides of the rotating frame body via a shaft body, and a rotational drive section that transmits rotational force to the rotating frame body, and the support section houses at least a portion of the rotational drive section. 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 via a rotation shaft, a support section that supports both sides of the rotating frame via a shaft body, and a rotational drive section that transmits rotational force to the rotating frame, and the support section houses at least a portion of the rotational drive section. Effect of the Invention

[0007] According to the present invention, the die device including the intermediate die can be made compact. [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. [Figure 9] 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. 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] 1(B) and 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. Note that d1 in Fig. 2 indicates the length in the rotation axis direction of the intermediate mold 10 according to the first embodiment, that is, the length from the first end of the shaft body 171 of the first shaft portion 17 to the second end of the rotational force generating portion 191 of the rotation drive portion 19.

[0013] The mold section 11 has a rotary frame 110 and plates 115 and 116. The rotary frame 110 constituting the mold section 11 is a metal frame that rotates by a rotary shaft 200. The rotary 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 plates of a plurality of molds attached to the rotary frame 110. The plates 115 are detachably attached to the rotary frame 110 via a member not shown, and are configured to rotate together with the rotary frame 110 when the rotary frame 110 rotates. In contrast, the plates 116 are fixed to the shafts 171 and 181 that do not rotate, while being disposed inside the rotary frame 110. 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] 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).

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] As shown in Figs. 2 to 4, the first shaft portion 17 has a shaft body 171, a first fixing member 172, and a second fixing member 173. The shaft body 171 is attached to the first side portion 111 of the rotating frame 110 via a bearing 117, and is a member that enables the rotating frame 110 to rotate by a rotating shaft 200. The shaft body 171 is formed with a hollow portion 201 in which a piping for passing a fluid (liquid or gas) such as a refrigerant can be arranged. An inlet / outlet 211 and an outlet 212 for leading the piping arranged in the hollow portion 201 to the outside are formed at each of the first end and the second end of the shaft body 171.

[0022] 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 first side surface 133 of support member 13 by bolts or the like.

[0023] As shown in Figs. 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 allows the rotary frame 110 to rotate by a rotary shaft 200 in a state where the shaft body 181 is attached to the second side portion 112 via a bearing 118 of the rotary frame 110. The shaft body 181 is formed with a hollow portion 202 in which a piping 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 181 are each formed with an inlet / outlet 221 and an outlet 222 for leading the piping arranged in the hollow portion 202 to the outside. The first fixing member 182 is a member that fixes the shaft body 181 in a state where the shaft body 181 penetrates 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 with a bolt or the like.

[0024] 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. As shown in Figures 3 and 4, the manifold 184 is provided with a plurality of through holes 189 through which the piping leading to the outside from the inlet / outlet 222 at the second end of the shaft body 181 can be arranged.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Comparing the length d2 in the rotation axis direction of the conventional intermediate die shown in Fig. 6 with the length d1 in the rotation axis direction of the intermediate die 10 according to the first embodiment shown in Fig. 2 described above, d2>d1. This is because, while the conventional intermediate die is configured such that the motor and the connecting part are arranged on the extension line of the rotation axis, the rotation drive part 19 according to the first embodiment is configured such that a part (a part of the rotational force transmission part 192 in the example of Fig. 2) is housed in the recess 143 of the support member 14 provided at a position shifted from the extension line of the rotation axis 200 in the radial direction of the rotation axis 200.

[0030] 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 in 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 110 that rotates together with the mold section 11 via a rotation axis 200, a support section 12 that supports both sides of the rotating frame 110 via shafts 171 and 181, and a rotational drive section 19 that transmits rotational force to the rotating frame 110, and the support section 12 houses at least a portion of the rotational drive section 19.

[0031] As a result, a part of the rotation drive unit 19 is stored in the support unit 12, so that the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact than when a part of the rotation drive unit 19 is not stored in the support unit 12. Furthermore, the piping 300 can be led out from the side where the rotation drive unit 19 is arranged.

[0032] 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 rotational drive unit 19 is stored in the recess 143 of the support member 14, so that the size in the rotational axis direction of the mold device 1 including the intermediate mold 10 can be made more compact than when at least a part of the rotational drive unit 19 is not stored in the recess 143 of the support part 12.

[0033] 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 to the shaft body 181 rather than in series. As a result, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact than when at least a part of the rotation drive unit 19 is arranged in series to the shaft body 181.

[0034] 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.

[0035] 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 part 192 is housed in the recess 143, so that at least a part of the rotational force transmission part 192 is arranged in parallel, not in series, to the rotation 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 more compact than when at least a part of the rotational force transmission part 192 is arranged in series to the rotation shaft 200.

[0036] 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 of 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.

[0037] Furthermore, the shaft (eg, shaft 181) may have a hollow portion (eg, hollow portion 202) in which piping 300 for passing a fluid can be disposed. With this, the piping 300 is disposed in the hollow portion of the non-rotating shaft, so that the piping can be stored inside the intermediate mold 10. As a result, the intermediate mold 10 can be stored in the storage space 40 compactly.

[0038] Furthermore, both ends of the hollow portion (eg, hollow portion 202) may form an entrance / exit (eg, entrance / exit 221 and 222) through which piping 300 can enter and exit in the direction of the rotation axis of the shaft body (eg, shaft body 181). This allows the piping to be arranged on the shaft body 181 which does not rotate.

[0039] In addition, shaft bodies 171 and 181 are each attached via bearings to both sides of the rotational axis direction of rotating frame body 110, and rotation drive unit 19 and piping 300 may be arranged on a shaft body (for example, shaft body 181) attached to one of shaft bodies 171 and 181. As a result, even if the rotary drive unit 19 is connected to the shaft body 181, the pipe 300 can be arranged on the same side as the rotary drive unit 19 on the shaft body 181.

[0040] 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 via a rotation shaft 200, a support section 12 which supports both sides of the rotating frame 110 via shafts 171 and 181, and a rotational drive section 19 which transmits rotational force to the rotating frame 110, and the support section 12 houses at least a portion of the rotational drive section 19.

[0041] As a result, a part of the rotation drive unit 19 is stored in the support unit 12, so that the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact than when a part of the rotation drive unit 19 is not stored in the support unit 12. Furthermore, piping can be extended from the side where the rotation drive unit 19 is arranged.

[0042] 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, wherein the intermediate mold 10 comprises a mold section 11 which 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 110 which rotates together with the mold section 11 via a rotating shaft 200, a support section 12 which supports both sides of the rotating frame 110 via shafts 171 and 181, and a rotational drive section 19 which transmits rotational force to the rotating frame 110, and the support section 12 houses at least a portion of the rotational drive section 19.

[0043] As a result, a part of the rotation drive unit 19 is stored in the support unit 12, so that the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact than when a part of the rotation drive unit 19 is not stored in the support unit 12. Furthermore, piping can be extended from the side where the rotation drive unit 19 is arranged.

[0044] <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. 7, the intermediate mold 50 has a mold section 51, a support section 52, a first shaft section 57, a second shaft section 58, and a rotation drive section 59. The mold section 51 has a rotary frame 510 which is a metal frame that rotates by a rotary shaft 600.

[0045] The support section 52 has support members 53 to 56. The support member 54 in 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.

[0046] The first shaft portion 57 has a shaft body 571, a first fixing member 572, and a second fixing member 573. The second shaft portion 58 has a shaft body 581, a first fixing member 582, a second fixing member 583, and a manifold 584.

[0047] As shown in FIG. 7, the rotation drive unit 59 includes a rotation force generation unit 591 that generates a rotation force, and a rotation force transmission unit 592 that transmits the rotation force generated by the rotation force generation unit 591 to the rotation frame body 510, and rotates the rotation frame body 510. In the rotation drive unit 59 according to the second embodiment, a part of the rotation force transmission unit 592 is housed in the recess 543, and the remaining part of the rotation force transmission unit 592 includes a part arranged to protrude from the recess 543 to the second side, and a part arranged on the extension line of the rotation axis 600 together with the rotation force generation unit 591.

[0048] In the rotation drive unit 59, the rotation force of the rotation force generation unit 591 is transmitted to the rotation frame body 510 via the rotation force transmission unit 592 as a rotation force transmission mechanism, and the mold unit 51 including the rotation frame body 510 is rotated. In the example of FIG. 7, the rotation force of the rotation force generation unit 591 arranged on the extension line of the rotation axis 600 is transmitted to the rotation frame body 510 via a part arranged on the extension line of the rotation axis 600, a part arranged to protrude from the recess 543 to the second side, and a part housed in the recess 543 in the rotation force transmission unit 592, and the mold unit 51 rotates.

[0049] In addition, the other configurations of each of the mold unit 51, the support unit 52, the first shaft portion 57, and the second shaft portion 58 shown in FIG. 7 are the same as the configurations of the mold unit 11, the support unit 12, the first shaft portion 17, and the second shaft portion 18 shown in FIG. 2 described above, and the description thereof is omitted. Further, d3 in FIG. 7 indicates the length in the rotation axis direction of the intermediate mold 50 according to the second embodiment.

[0050] Here, when comparing the length d3 in the rotation axis direction of the intermediate mold 50 according to the second embodiment shown in FIG. 7 with the length d2 in the rotation axis direction of the conventional intermediate mold shown in FIG. 6 described above, d3 < d2. This is because the conventional intermediate mold has a configuration in which the motor and the connecting portion are arranged on the extension line of the rotation axis, whereas in the rotation drive unit 59 according to the second embodiment, although the rotation force generation unit 591 is arranged on the extension line of the rotation axis 600, a part of the rotation force transmission unit 592 is housed in the recess 543 of the support member 54 provided at a position displaced in the radial direction of the rotation axis 600 from the extension line of the rotation axis 600.

[0051] 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. In other words, 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 that rotates together with the mold section 51 via a rotating shaft 600, a support section 52 that supports both sides of the rotating frame via shafts 571 and 581, and a rotational drive section 59 that transmits rotational force to the rotating frame 510, and the support section 52 houses at least a portion of the rotational drive section 59. 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 the extension line of the rotation shaft 600, and the remainder to be disposed at a position offset from the extension line of the rotation shaft 600. As a result, the size of the mold apparatus 1 including the intermediate mold 50 in the rotation axis direction can be made more compact than when the entire rotation drive unit 59 is disposed on the extension line of the rotation shaft 600. Furthermore, piping can be extended from the side where the rotation drive unit 19 is disposed.

[0052] <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. The intermediate mold 70 shown in Fig. 8 has a mold section 71, a support section 72, shafts 77 and 78, and a rotation drive section 79. The mold section 71 has a rotary frame 710 and plates 716. The support section 72 has support members 73 to 76. Note that d4 in Fig. 8 indicates the length in the top-bottom direction of the intermediate mold 70 according to the third embodiment.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The shaft body 77 is a member that allows the rotating frame body 710 to rotate on a rotating shaft 800 when attached to the top side part 713 of the rotating frame body 710 via a bearing 717. The shaft body 77 is fixed to the support part 72 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 rotating frame body 710 to rotate on the rotating shaft 800 when attached to the bottom side part 714 of the rotating 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 a pipe can be arranged, and inlets and outlets 821 and 822 for the pipe. 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] FIG. 9 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. The conventional intermediate die shown in Fig. 9 has a rotary frame to which plates of the die are attached, a shaft attached to each of the top and bottom sides of the rotary frame via bearings (not shown), a support frame to which the shaft is fixed, and a motor to apply a rotational force to the rotary frame via a connecting part. The rotary frame rotates together with the plates (not shown) by the rotary shaft shown in Fig. 9. The rotary shaft shown in Fig. 9 rotates in the same direction as the rotary shaft 800 in Fig. 8 described above.

[0064] Comparing the vertical length d4 of the intermediate mold 70 according to the third embodiment shown in FIG. 8 above with the length d5 in the rotation axis direction of the conventional intermediate mold shown in FIG. 9, d4 < d5. As shown in FIG. 8, in the rotation drive unit 79 according to the third embodiment, the rotation force generation unit 791 is disposed at a position shifted in the radial direction of the rotation axis 800 from the extension line of the rotation axis 800, and a part of it is housed in the concave portion 753 of the support member 75. Thereby, the vertical length d4 of the intermediate mold 70 is shorter than the length d5 in the rotation axis direction of the conventional intermediate mold.

[0065] In summary, the intermediate mold, the mold device, and the injection molding machine to which the third embodiment of the present invention is applied may have the following configurations and can take various embodiments. That is, the intermediate mold 70 according to the third embodiment is an intermediate mold disposed between the fixed-side mold 30 and the movable-side mold 20 in the mold device 1 of the injection molding machine 100, and includes a mold part 71 that performs a mold opening / closing operation 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 part 71 by the rotation axis 800, a support part 72 that supports both sides of the rotating frame body 710 via the shaft bodies 77 and 78, and a rotation drive part 79 that transmits a rotational force to the rotating frame body 710, and the support part 72 is characterized in that it houses at least a part of the rotation drive part 79. Here, the shaft bodies 77 and 78 are respectively attached to both sides in the vertical direction of the rotating frame body 710, and the support part 72 may support the top side and the bottom side of the rotating frame body 710 via the shaft bodies 77 and 78. Thereby, the size in the vertical direction of the intermediate mold 70 in the mode of rotating the rotating frame body 710 by the rotation axis 800 extending in the vertical direction can be made compact.

[0066] Further, the rotation drive unit 79 may be connected to the top side of the rotating frame body 710, and the pipe 300 may be disposed on the shaft body 78 attached to the bottom side of the rotating frame body 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.

[0067] <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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] In addition, in the first and second embodiments described above, the second shaft portion 18 includes a manifold 184 as a component thereof, but this is not limited to this, and the first shaft portion 17 may include a manifold as a component thereof.

[0073] 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]

[0074] 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... rotation shaft, 201, 202, 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 support portion accommodates at least a part of the rotation drive portion. 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 rotary drive unit is disposed on an extension line of the rotary shaft. The intermediate mold according to claim 1 .

8. The shaft body has a hollow portion in which a pipe through which a fluid can be disposed. The intermediate mold according to claim 1 .

9. The hollow portion has two ends each having an inlet and outlet through which the piping can enter and exit in the direction of the rotation axis of the shaft body. The intermediate mold according to claim 8.

10. the shaft body is attached to both sides of the rotary frame in a rotation axis direction via bearings, The rotary drive unit and piping are arranged on one side of the shaft body.

10. The intermediate mould according to claim 9.

11. The shaft body is attached to both sides of the rotating frame in the top-bottom direction 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 .

12. The rotary drive unit is connected to the top side of the rotary frame, and a pipe for passing a fluid is disposed on a shaft body attached to the bottom side of the rotary frame. The intermediate mold according to claim 11.

13. A mold device of an injection molding machine, An intermediate die disposed between the fixed die and the movable die, a mold section that performs a mold opening and closing operation with 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 support portion accommodates at least a part of the rotation drive portion. Mold equipment.

14. An injection molding machine equipped with a mold assembly including a fixed mold, a movable mold, and an intermediate mold disposed between the fixed mold and the movable mold, The intermediate mold is a mold section that performs a mold opening and closing operation with 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 support portion accommodates at least a part of the rotation drive portion. Injection molding machine.

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