Intermediate mold, mold device, and injection molding machine

Abstract

The invention relates to an intermediate mold, a mold device and an injection molding machine, which can realize the compactness of the mold device comprising the intermediate mold. An intermediate mold (10) disposed between a fixed-side mold and a movable-side mold in a mold device of an injection molding machine is an intermediate mold disposed between the fixed-side mold and the movable-side mold in the mold device of the injection molding machine, and is provided with: a mold part (11) that performs a mold opening / closing operation with a mold facing one of the fixed-side mold and the movable-side mold; a rotating frame body (110) which rotates together with the mold part (11) through a rotating shaft (200); a support part (12) that supports both sides of the rotating frame (110) via shaft bodies (171) and (181); and a rotary drive unit (19) that transmits a rotational force to the rotary housing (110), and the support unit (12) accommodates at least a portion of the rotary drive unit (19).

Description

Technical Field

[0001] This application claims priority based on Japanese Patent Application No. 2023-141109 filed on August 31, 2023. The entire contents of this Japanese application are incorporated herein by reference.

[0002] The invention relates to an intermediate mold, a mold device and an injection molding machine. Background Art

[0003] As a mold device constituting an injection molding machine, there is a mold device having an intermediate mold arranged between a fixed side mold and a movable side mold. In addition, as an intermediate mold, there is a rotating mold that moves while rotating between a position opposite to the fixed side mold and a position opposite to the movable side mold, and alternately performs mold opening and closing actions at each position (for example, Patent Document 1). This rotating mold is mounted on a rotating frame having a rotating shaft, and rotates together with the rotating frame if the rotating frame rotates. The rotating frame rotates by a rotational force obtained from a rotating drive unit composed of a motor or the like.

[0004] Patent Document 1: Japanese Patent No. 4283181

[0005] The mold device including the intermediate mold is used to accommodate the storage space of the injection molding machine. Due to the relationship between the size of the injection molding machine and the size, the size of the mold device including the intermediate mold is limited, so there is a demand to make the size of the mold device including the intermediate mold compact. However, the conventional intermediate mold adopts a method of connecting the rotation drive unit in series with the rotating frame. In this case, the entire rotation drive unit is arranged on the extension line of the rotation axis of the rotating frame, which hinders the compactness of the size of the mold device. Summary of the invention

[0006] An object of the present invention is to achieve compactness of a mold device including an intermediate mold.

[0007] The present invention completed based on the above-mentioned purpose is an intermediate mold, which 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 part, which performs mold opening and closing actions with the opposite molds of the fixed side mold and the movable side mold; a rotating frame, which rotates together with the mold part through a rotating axis; a supporting part, which supports both sides of the rotating frame via an axis; and a rotating drive part, which transmits the rotational force to the rotating frame, and the supporting part accommodates at least a part of the rotating drive part.

[0008] Here, a recessed portion for accommodating at least a part of the rotation driving portion may be formed in the supporting portion.

[0009] Furthermore, the recessed portion may be formed at a position offset from an extension line of the rotation axis in a radial direction of the rotation axis.

[0010] Furthermore, the recessed portion may be formed at a position offset upward in the vertical direction from an extension line of the rotation shaft.

[0011] Furthermore, at least a part of a rotational force transmission mechanism of the rotation drive unit that transmits the rotational force to the rotation frame body may be accommodated in the recessed portion.

[0012] Furthermore, the rotational force transmission mechanism may be a gear mechanism in which a plurality of gears are linked together.

[0013] Furthermore, a portion of the rotation drive unit may be disposed on an extension line of the rotation axis.

[0014] Furthermore, the shaft body may have a hollow portion in which a pipe through which a fluid can pass can be arranged.

[0015] Furthermore, both ends of the hollow portion may be formed with inlets and outlets through which the pipe can be inserted and removed in the direction of the rotation axis of the shaft body.

[0016] Furthermore, the shaft body may be mounted on both sides of the rotating frame body in the rotating axis direction via bearings, and the rotation drive unit and the pipe may be arranged on one side of the shaft body.

[0017] Furthermore, the shaft body may be mounted on both sides of the rotating frame body in the up-down direction via bearings, and the support portion may support the upper side and the lower side of the rotating frame body via the shaft body.

[0018] Furthermore, the rotation drive unit may be connected to the upper side of the rotation frame, and a pipe through which a fluid passes may be arranged in a shaft body attached to the lower side of the rotation frame.

[0019] Furthermore, the present invention is a mold device, which is a mold device of an injection molding machine, characterized in that the intermediate mold arranged between the fixed side mold and the movable side mold comprises: a mold part, which performs mold opening and closing actions with the opposite molds of the fixed side mold and the movable side mold; a rotating frame, which rotates together with the mold part through a rotating axis; a supporting part, which supports both sides of the rotating frame via an axis; and a rotating drive part, which transmits the rotational force to the rotating frame, and the supporting part accommodates at least a part of the rotating drive part.

[0020] Furthermore, the present invention is an injection molding machine equipped with a mold device, wherein the mold device is composed of a fixed side mold, a movable side mold and an intermediate mold arranged between the fixed side mold and the movable side mold, and the injection molding machine is characterized in that the intermediate mold comprises: a mold part, which performs mold opening and closing actions with the opposite molds of the fixed side mold and the movable side mold; a rotating frame, which rotates together with the mold part through a rotating axis; a supporting part, which supports both sides of the rotating frame via an axis; and a rotating drive part, which transmits the rotational force to the rotating frame, and the supporting part accommodates at least a part of the rotating drive part.

[0021] Effects of the Invention

[0022] According to the present invention, it is possible to make the mold device including the intermediate mold compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a perspective view showing an example of the external appearance structure of each of the injection molding machine and a part of the mold device mounted on the injection molding machine according to the first embodiment.

[0024] Figure 2 It is a cross-sectional view showing an example of the structure of the intermediate mold of the mold device.

[0025] Figure 3 It is a perspective view showing a state after the mold part is removed from the intermediate mold.

[0026] Figure 4 It is a perspective view showing an example of the external appearance structure of each of the first shaft portion, the second shaft portion, and the rotation drive portion.

[0027] Figure 5 It is a perspective view showing a state when the second shaft portion and the rotation drive portion are viewed from the lower side toward the upper side in the up-down direction.

[0028] Figure 6 This is a cross-sectional view showing an example of the structure of an intermediate mold of a mold device mounted on a conventional injection molding machine.

[0029] Figure 7 It means that it is installed on Figure 1 A cross-sectional view showing an example of the structure of an intermediate mold of a mold device according to a second embodiment of an injection molding machine.

[0030] Figure 8 It means that it is installed on Figure 1 A cross-sectional view showing an example of the structure of an intermediate mold of a mold device according to a third embodiment of an injection molding machine.

[0031] Fig. 9This is a cross-sectional view showing an example of the structure of an intermediate mold of a mold device mounted on a conventional injection molding machine.

[0032] Explanation of symbols

[0033] 1-mold device, 10-intermediate mold, 11, 51, 71-mold part, 12, 52, 72-support part, 13, 14, 15, 16-support part, 17, 57-first shaft part, 18, 58-second shaft part, 19-rotation drive part, 20-fixed side mold, 30-movable side mold, 100-injection molding machine, 200, 600, 800, 900-rotation axis, 201, 202, 802-hollow part. DETAILED DESCRIPTION

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0035] <First embodiment>

[0036] (Structure of injection molding machine)

[0037] Figure 1 It is a perspective view showing an example of the external appearance structure of each of the injection molding machine 100 and a part of the mold device 1 mounted on the injection molding machine 100 according to the first embodiment.

[0038] Figure 2 It is a cross-sectional view showing an example of the structure of the intermediate mold 10 of the mold device 1.

[0039] Figure 3 It is a perspective view showing a state in which the mold section 11 is removed from the intermediate mold 10 .

[0040] Figure 4 It is a perspective view showing an example of the external appearance structure of each of the first shaft portion 17 , the second shaft portion 18 , and the rotation drive portion 19 .

[0041] Figure 1 The injection molding machine 100 shown is a molding machine for injection blow molding. Injection blow molding refers to a molding method that performs injection molding (injection molding) and blow molding in two stages. In injection blow molding, a preform that becomes a prototype of a product is first molded in injection molding (injection molding). In blow molding, air is introduced into the inside of the preform to expand it, thereby molding a product.

[0042] The injection molding machine 100 has a storage space 40, and the mold device 1 is arranged in the storage space 40. The mold device 1 is a mold device capable of performing 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 action for closing the mold and a mold opening action for opening the mold at a position respectively opposite to the fixed side mold 30 and the movable side mold 20. The mold device 1 performs injection molding (injection molding) by the mold closing action of the intermediate mold 10 and the fixed side mold 30, and performs blow molding by the mold closing action of the intermediate mold 10 and the movable side mold 20.

[0043] like Figure 1 Medium(B) and Figure 2 As shown, the intermediate mold 10 includes a mold portion 11, a support portion 12, a first shaft portion 17, a second shaft portion 18, and a rotation drive portion 19. Figure 2 d1 represents the length of the intermediate mold 10 in the rotation axis direction 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 rotation force generating portion 191 of the rotation drive portion 19 .

[0044] The mold part 11 has a rotating frame 110, and plates 115 and 116. The rotating frame 110 constituting the mold part 11 is a metal frame that rotates by a rotating shaft 200. The rotating frame 110 is composed of a first side portion 111, a second side portion 112, an upper side portion 113, and a lower side portion 114, which are metal plates, and they are connected by bolts, etc., to form a frame. The plates 115 and 116 constituting the mold part 11 are plates of multiple molds installed on the rotating frame 110. The plate 115 is configured to be detachably installed on the rotating frame 110 via a component not shown in the figure, and rotates with the rotating frame 110 if the rotating frame 110 rotates. In contrast, the plate 116 is fixed to the non-rotating shafts 171 and 181 in a state configured on the inner side of the rotating frame 110. Therefore, unlike the plate 115, the plate 116 becomes a non-rotating structure.

[0045] In addition, in the present embodiment, with respect to the rotating frame 110, a rotating frame (the boundary lines between the parts are not shown) which is assembled from the first side portion 111, the second side portion 112, the upper side portion 113 and the lower side portion 114 which are metal plates is described, but the first side portion 111, the second side portion 112, the upper side portion 113 and the lower side portion 114 may be formed as a whole, or may be formed by assembling a plurality of parts.

[0046] The first shaft 17 is mounted on the first side 111 of the rotating frame 110 via a bearing 117 formed by a bearing or the like. The second shaft 18 is mounted on the second side 112 of the rotating frame 110 via a bearing 118 formed by a bearing or the like. In the mold part 11, when the rotating frame 110 rotates by the rotating shaft 200, the plates 115 rotate together with it, and the plates 115 rotate by the fixed side mold 30 (refer to FIG. 2 ). Figure 1 ) to perform injection molding (injection molding) by closing the mold, and by connecting with the movable side mold 20 (reference Figure 1 ) to perform the mold closing action to perform blow molding while rotating and moving between the positions.

[0047] The support portion 12 has support members 13 to 16. Figure 2 and Figure 3 As shown, the support member 13 constituting the support portion 12 is a member that supports the rotating frame 110 via the first shaft portion 17 mounted on the first side portion 111 of the rotating frame 110. A through hole 131 that penetrates along the rotation axis direction is provided on the support member 13. The through hole 131 forms a space for arranging the first shaft portion 17. In addition, a through hole 132 that penetrates along the opening and closing direction is provided on the support member 13. The through hole 132 is a through hole for sliding a connecting rod (not shown) that guides the mold opening and closing action of the intermediate mold 10 and the fixed side mold 30 and the mold opening and closing action of the intermediate mold 10 and the movable side mold 20. The through hole 132 is formed near the respective ends of the upper and lower sides of the support member 13 in the up and down directions.

[0048] like Figure 2 and Figure 3 As shown, the support member 14 constituting the support portion 12 is a member that supports the rotating frame 110 via the second shaft portion 18 mounted on the second side portion 112 of the rotating frame 110. A through hole 141 is provided on the support member 14, which passes through in the direction of the rotating axis. The through hole 141 forms a space for arranging the second shaft portion 18. In addition, a through hole 142 is provided on the support member 14, which passes through in the opening and closing direction. The through hole 142 is a through hole for sliding a connecting rod (not shown) that guides the mold opening and closing action of the intermediate mold 10 and the fixed side mold 30 and the mold opening and closing action of the intermediate mold 10 and the movable side mold 20. The through hole 142 is formed near the respective ends of the upper and lower sides of the support member 14 in the up and down directions.

[0049] And, if Figure 2 As shown, a portion that is recessed toward the first side of the support member 14, i.e., a recessed portion 143, is formed in the surface 144 on the second side of the support member 14 at a position that is offset upward from the extension line of the rotation axis 200. The recessed portion 143 is a recessed portion that forms a space capable of accommodating at least a portion of the rotation drive unit 19. Figure 2 In the example, a part of the rotation force transmission part 192 constituting the rotation drive part 19 is accommodated in the recess 143. The recess 143 may also be formed at a position offset downward from the extension line of the rotation shaft 200, but is preferably as shown in FIG. Figure 2 As in the example of FIG. , it is formed at a position offset upward from the extension line of the rotation axis 200. This is due to the following reason.

[0050] That is, the reason is that if the recessed portion 143 is formed at a position offset downward from the extension line of the rotating shaft 200, the rotating drive unit 19 will be arranged at a position lower than the extension line of the rotating shaft 200. In this case, the piping described later will be arranged on the side where the rotating drive unit 19 is not arranged, that is, arranged above the extension line of the rotating shaft 200 or on the extension line of the rotating shaft 200, but compared with the case where the piping is arranged below the extension line of the rotating shaft 200, when the fluid leaks from the piping, the probability of the fluid leaking toward the upper side increases due to the path of the piping and the relaxation method.

[0051] like Figure 2 and Figure 3 As shown in FIG. 1 , the support member 15 constituting the support portion 12 is a member disposed on the upper side of the support members 13 and 14. 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. Figures 1 to 3 As shown, the support member 16 constituting the support portion 12 is a member disposed below the support members 13 and 14, and positions 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. Furthermore, the support members 13 to 16 may be formed as one body.

[0052] like Figures 2 to 4 As shown, 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 a member that can rotate the rotating frame 110 through the rotating shaft 200 when the shaft body 171 is mounted on the first side portion 111 via the bearing 117 of the rotating frame 110. A hollow portion 201 is formed in the shaft body 171, and the hollow portion 201 can be configured with a pipe for a fluid (liquid or gas) such as a refrigerant to pass through. The ends of the first side and the second side of the shaft body 171 are respectively formed with inlets and outlets 211 and 212 for extending the pipe arranged in the hollow portion 201 to the outside.

[0053] The first fixing member 172 is a member that fixes the shaft 171 while passing through the second fixing member 173, and is joined to the shaft 171 and the second fixing member 173 by welding or the like. The second fixing member 173 is fixed to the first side surface 133 of the support member 13 by bolts or the like.

[0054] like Figures 2 to 4 As shown, the second shaft portion 18 has a shaft body 181, a first fixing component 182, a second fixing component 183 and a diverter 184. The shaft body 181 is a component that can rotate the rotating frame body 110 through the rotating shaft 200 when the shaft body 181 is installed on the second side portion 112 via the bearing 118 of the rotating frame body 110. A hollow portion 202 is formed in the shaft body 181, and the hollow portion 202 can be configured with a pipe for a fluid (liquid or gas) such as a refrigerant to pass through. The ends of the first side and the second side of the shaft body 181 are respectively formed with inlets and outlets 221 and 222 for extending the pipe arranged in the hollow portion 202 to the outside. The first fixing component 182 is a component that is fixed in a state where the shaft body 181 passes through the second fixing component 183, and is joined to the shaft body 181 and the second fixing component 183 by welding or the like. The second fixing member 183 is fixed to the second side surface 144 of the supporting member 14 by bolts or the like.

[0055] like Figures 2 to 4 As shown, the flow divider 184 is a box-shaped metal component for concentrating or branching the pipes arranged in the hollow portion 202 of the shaft body 181 and extending them to the outside of the intermediate mold 10. The flow divider 184 is arranged to cover the inlet and outlet 222 of the second side end of the shaft body 181 that passes through the second fixing member 183. Figure 3 and Figure 4 As shown, the manifold 184 is provided with a plurality of through holes 189 , and pipes extending from the inlet and outlet 222 at the second end of the shaft body 181 to the outside can be arranged in the through holes 189 .

[0056] like Figures 2 to 4 As shown, the rotation drive unit 19 includes: a rotation force generating unit 191 that generates a rotation force; and a rotation force transmitting unit 192 that transmits the rotation force generated in the rotation force generating unit 191 to the rotating frame 110, and rotates the rotating 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, for example, a gear box including a plurality of gears, shafts, supports, etc. 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 rotating frame 110 through the rotation force transmitting unit 192 as a rotation force transmitting mechanism, so that the rotating frame 110 rotates. The rotation drive unit 19 involved in the first embodiment is configured so that a portion of the rotation force transmitting unit 192 is accommodated in the recess 143 of the support member 14, and the remaining portion is exposed from the recess 143 to the second side.

[0057] Figure 5 It is a perspective view showing a state when the second shaft portion 18 and the rotation drive portion 19 are viewed from the lower side toward the upper side in the up-down direction.

[0058] As mentioned above Figure 2 As shown, a hollow portion 202 capable of arranging piping or electrical wiring is formed on the shaft body 181 of the second shaft portion 18. The piping or electrical wiring passing through the hollow portion 202 is arranged to extend to the outside of the intermediate mold 10 through the inlet and outlet 222 at the end of the second side of the shaft body 181 and the diverter 184. Figure 5 , as an example, a state in which the pipe 300 is extended to the outside of the intermediate mold 10 via the manifold 184 is shown.

[0059] exist Figure 5 In the example, a plurality of through holes 189 are provided on the second side surface 185 in the direction of the rotation axis, the third side surface 186 in the opening and closing direction, the fourth side surface 187 in the opening and closing direction, and the lower side surface 188 in the up-down direction of the diverter 184. Specifically, four through holes 189 are provided on the lower side surface 188 in the up-down direction of the diverter 184, and pipes 300 are respectively arranged in three of the through holes 189. These pipes 300 all extend downward. In addition, Figure 5 The arrangement of the through hole 189 of the flow divider 184 and the pipe 300 shown is only an example.

[0060] Figure 6 This is a cross-sectional view showing an example of the structure of an intermediate mold of a mold device mounted on a conventional injection molding machine.

[0061] Figure 6 In the figure, as a conventional intermediate mold, a specific example of the intermediate mold is shown, which comprises: a rotating frame body, on which a mold plate is mounted; a shaft body, which is mounted on the first side and the second side of the rotating axis direction of the rotating frame body via bearings; a support frame, which fixes the shaft body; and a motor, which applies a rotational force to the shaft body via a connecting portion. In addition, Figure 6 The rotation axis shown is the same as the above Figure 2 The rotation axis 200 is in the same direction as the rotation axis.

[0062] If you will Figure 6 The length d2 of the conventional intermediate mold in the direction of the rotation axis is different from the above Figure 2 Compared with the length d1 of the intermediate mold 10 in the first embodiment shown in FIG. 1 , d2>d1. This is because the conventional intermediate mold has a structure in which the motor and the connecting part are arranged on the extension line of the rotating shaft, whereas the rotary drive part 19 in the first embodiment is configured as follows: a part (in Figure 2 In the example, a portion of the rotation force transmission portion 192 is accommodated in a recessed portion 143 of the support member 14 provided at a position offset from the extension line of the rotation shaft 200 in the radial direction of the rotation shaft 200.

[0063] As described above, the intermediate mold, the mold device, and the injection molding machine to which the first embodiment of the present invention is applied can adopt various embodiments as long as the following structures are adopted.

[0064] That is, the intermediate mold 10 involved in 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 includes: a mold part 11, which performs mold opening and closing actions with the opposite molds in the fixed side mold 30 and the movable side mold 20; a rotating frame 110, which rotates together with the mold part 11 through the rotating shaft 200; a supporting part 12, which supports both sides of the rotating frame 110 via shafts 171 and 181; and a rotating drive part 19, which transmits the rotational force to the rotating frame 110, and the supporting part 12 accommodates at least a part of the rotating drive part 19.

[0065] Thus, since a part of the rotation drive unit 19 is accommodated in the support unit 12, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact compared to a case where a part of the rotation drive unit 19 is not accommodated in the support unit 12. Furthermore, the pipe 300 can be extended from the side where the rotation drive unit 19 is arranged.

[0066] Here, a recessed portion 143 for accommodating at least a part of the rotation driving unit 19 may be formed in the support member 14 of the support portion 12 .

[0067] Thus, since at least a portion of the rotation drive unit 19 is accommodated in the recess 143 of the support member 14, the size of the mold device 1 including the intermediate mold 10 in the direction of the rotation axis can be made more compact compared to a case where at least a portion of the rotation drive unit 19 is not accommodated in the recess 143 of the support member 12.

[0068] Furthermore, the recessed portion 143 may be formed at a position offset from an extension line of the rotating shaft 200 in the radial direction of the rotating shaft 200 .

[0069] Thus, at least a portion of the rotation drive unit 19 is accommodated in the recess 143 formed at a position offset from the extension line of the rotation axis 200 in the radial direction of the rotation axis 200, so that at least a portion of the rotation drive unit 19 is arranged in parallel with the shaft body 181 instead of being arranged in series. As a result, compared with a case where at least a portion of the rotation drive unit 19 is arranged in series with the shaft body 181, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact.

[0070] Also, the recess 143 may be formed at a position offset from an extension line of the rotation shaft 200 to an upper side in the vertical direction.

[0071] Thus, at least a portion of the rotation drive unit 19 is arranged on the upper side relative to the shaft 181, so that the pipe 300 can be extended to the lower side where the rotation drive unit 19 is not arranged. As a result, when the fluid leaks from the pipe 300, the probability of the fluid leaking to the upper side can be reduced due to the relationship between the path and the relaxation of the pipe 300.

[0072] Furthermore, at least a part of a rotation force transmission unit 192 of the rotation drive unit 19 that transmits the rotation force to the rotation frame body 110 may be accommodated in the recessed portion 143 .

[0073] Thus, at least a portion of the rotation force transmission part 192 is accommodated in the recessed portion 143, so that at least a portion of the rotation force transmission part 192 is arranged in parallel with the rotation axis 200 instead of being arranged in series. As a result, compared with a case where at least a portion of the rotation force transmission part 192 is arranged in series with the rotation axis 200, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact.

[0074] Furthermore, the rotational force transmission mechanism may be a gear mechanism in which a plurality of gears are linked together.

[0075] Thus, for example, the size of the rotational force transmission mechanism can be reduced compared to a case where the rotational force transmission mechanism is a belt mechanism instead of a gear mechanism. As a result, the space formed by the recess 143 can be reduced (the depression of the support member 14 can be reduced), so the strength of the support member 14 formed with the recess 143 can be ensured.

[0076] Furthermore, the shaft body (for example, the shaft body 181 ) may have a hollow portion (for example, the hollow portion 202 ) in which the pipe 300 through which the fluid passes can be arranged.

[0077] Thus, since the pipe 300 is disposed in the hollow portion of the non-rotating shaft body, the pipe and the like can be accommodated inside the intermediate die 10. As a result, the intermediate die 10 can be accommodated in the accommodation space 40 in a compact manner.

[0078] In addition, both ends of the hollow portion (e.g., hollow portion 202) may be formed with inlets and outlets (e.g., inlets and outlets 221 and 222) that allow the pipe 300 to enter and exit in the direction of the rotation axis of the shaft (e.g., shaft 181). Thus, the pipe can be arranged on the non-rotating shaft 181.

[0079] Furthermore, the shafts 171 and 181 may be installed on both sides of the rotation axis direction of the rotating frame 110 via bearings, and the rotation drive unit 19 and the piping 300 may be arranged on the shaft installed on one of the shafts 171 and 181 (for example, the shaft 181 ).

[0080] Thus, even if the rotation drive unit 19 is connected to the shaft body 181 , the pipe 300 can be arranged on the shaft body 181 from the same side as the rotation drive unit 19 .

[0081] Furthermore, the present invention is a mold device, which is a mold device 1 of an injection molding machine 100, characterized in that the intermediate mold 10 arranged between the fixed side mold 30 and the movable side mold 20 comprises: a mold part 11, which performs mold opening and closing actions with the opposite molds of the fixed side mold 30 and the movable side mold 20; a rotating frame 110, which rotates together with the mold part 11 through a rotating shaft 200; a supporting part 12, which supports both sides of the rotating frame 110 via shafts 171 and 181; and a rotating drive part 19, which transmits the rotational force to the rotating frame 110, and the supporting part 12 accommodates at least a part of the rotating drive part 19.

[0082] Thus, since a part of the rotation drive unit 19 is accommodated in the support unit 12, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact compared to a case where a part of the rotation drive unit 19 is not accommodated in the support unit 12. Furthermore, piping can be extended from the side where the rotation drive unit 19 is arranged.

[0083] Furthermore, the present invention is an injection molding machine equipped with a mold device 1, wherein the mold device 1 is composed of a fixed side mold 30, a movable side mold 20 and an intermediate mold 10 arranged between the fixed side mold 30 and the movable side mold 20, and the injection molding machine 100 is characterized in that the intermediate mold 10 comprises: a mold part 11, which performs mold opening and closing actions with the opposite molds of the fixed side mold 30 and the movable side mold 20; a rotating frame 110, which rotates together with the mold part 11 through a rotating shaft 200; a supporting part 12, which supports both sides of the rotating frame 110 via shafts 171 and 181; and a rotating drive part 19, which transmits the rotational force to the rotating frame 110, and the supporting part 12 accommodates at least a part of the rotating drive part 19.

[0084] Thus, since a part of the rotation drive unit 19 is accommodated in the support unit 12, the size of the mold device 1 including the intermediate mold 10 in the rotation axis direction can be made more compact compared to a case where a part of the rotation drive unit 19 is not accommodated in the support unit 12. Furthermore, piping can be extended from the side where the rotation drive unit 19 is arranged.

[0085] <Second embodiment>

[0086] Figure 7 It means that it is installed on Figure 1 A cross-sectional view of an example of the structure of the intermediate mold 50 of the mold device according to the second embodiment of the injection molding machine 100. Figure 7 In the attached figure, the inner side becomes Figure 1The third side of the opening and closing direction, the figure and the front side become Figure 1 The 4th side in the opening and closing direction.

[0087] like Figure 7 As shown, the intermediate mold 50 includes 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 includes a rotating frame 510 which is a metal frame that rotates via a rotating shaft 600.

[0088] The support portion 52 has support members 53 to 56. The support member 54 in the support portion 52 is a member that supports the mold portion 51 via the second shaft portion 58 mounted on the second side of the mold portion 51. A recessed portion 543 is formed at a position offset upward from the extension line of the rotation shaft 600 on the second side of the support member 54. The recessed portion 543 is a recessed portion in which a space capable of accommodating at least a part of the rotation drive portion 59 is formed.

[0089] The first shaft portion 57 includes a shaft body 571 , a first fixing member 572 , and a second fixing member 573 . The second shaft portion 58 includes a shaft body 581 , a first fixing member 582 , a second fixing member 583 , and a flow divider 584 .

[0090] like Figure 7 As shown, the rotation drive unit 59 includes: a rotation force generating unit 591 that generates a rotation force; and a rotation force transmitting unit 592 that transmits the rotation force generated in the rotation force generating unit 591 to the rotation frame 510, and rotates the rotation frame 510. In the rotation drive unit 59 involved in the second embodiment, a part of the rotation force transmitting unit 592 is accommodated in the recess 543, and the remaining part of the rotation force transmitting unit 592 includes: a part configured to protrude from the recess 543 to the second side; and a part configured on the extension line of the rotation axis 600 together with the rotation force generating unit 591.

[0091] In the rotation drive unit 59, the rotation force of the rotation force generating unit 591 is transmitted to the rotating frame 510 via the rotation force transmitting unit 592 as a rotation force transmitting mechanism, so that the mold unit 51 including the rotating frame 510 rotates. Figure 7 In the example, the rotational force of the rotational force generating portion 591 arranged on the extension line of the rotating shaft 600 is transmitted to the rotating frame 510 via the portion of the rotational force transmitting portion 592 arranged on the extension line of the rotating shaft 600, the portion arranged to protrude from the recess 543 to the second side, and the portion accommodated in the recess 543, thereby rotating the mold portion 51.

[0092] in addition, Figure 7 The other structures of the mold part 51, the support part 52, the first shaft part 57 and the second shaft part 58 are the same as those described above. Figure 2The mold portion 11, the support portion 12, the first shaft portion 17, and the second shaft portion 18 shown have the same structure, and the description thereof is omitted. Figure 7 d3 represents the length of the intermediate die 50 according to the second embodiment in the direction of the rotation axis.

[0093] Here, if Figure 7 The length d3 of the intermediate die 50 in the second embodiment shown in the figure in the direction of the rotation axis is the same as that in the above-mentioned Figure 6 Compared with the length d2 of the conventional intermediate mold in the direction of the rotation axis shown in FIG. 1 , d3 < d2. The reason is that the conventional intermediate mold is a structure in which the motor and the connecting part are arranged on the extension line of the rotation axis. In contrast, the rotation drive part 59 involved in the second embodiment is a structure in which the rotation force generating part 591 is arranged on the extension line of the rotation axis 600, but a part of the rotation force transmitting part 592 is accommodated in the recess 543 of the support member 54 provided at a position offset from the extension line of the rotation axis 600 in the radial direction of the rotation axis 600.

[0094] As described above, the intermediate mold, the mold device, and the injection molding machine to which the second embodiment of the present invention is applied can adopt various embodiments as long as the following structures are adopted.

[0095] That is, the intermediate mold 50 involved in 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 includes: a mold part 51, which performs mold opening and closing actions with the opposite molds in the fixed side mold 30 and the movable side mold 20; a rotating frame, which rotates together with the mold part 51 through the rotating shaft 600; a supporting part 52, which supports both sides of the rotating frame via shafts 571 and 581; and a rotating drive part 59, which transmits the rotational force to the rotating frame 510, and the supporting part 52 accommodates at least a part of the rotating drive part 59.

[0096] Here, a part of the rotation drive unit 59 may be disposed on an extension line of the rotation shaft 600 .

[0097] Thus, a part of the rotation drive unit 59 can be arranged on the extension line of the rotation axis 600, and the remaining part can be arranged at a position offset from the extension line of the rotation axis 600. As a result, the size of the mold device 1 including the intermediate mold 50 in the rotation axis direction can be made more compact compared to the case where the rotation drive unit 59 is arranged entirely on the extension line of the rotation axis 600. In addition, the piping can be extended from the side where the rotation drive unit 19 is arranged.

[0098] <Third embodiment>

[0099] Figure 8 It means that it is installed on Figure 11 is a cross-sectional view of an example of the structure of the intermediate mold 70 of the mold device according to the third embodiment of the injection molding machine 100. Figure 8 The short side direction of the intermediate mold 70 is Figure 1 The opening and closing directions are the same direction, Figure 8 The inside of the attached figure is Figure 1 The third side of the opening and closing direction, Figure 8 The attached figure is Figure 1 The 4th side in the opening and closing direction.

[0100] Figure 8 The intermediate mold 70 shown 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 rotating frame 710 and plates 716. The support part 72 has support members 73 to 76. In addition, Figure 8 d4 represents the length in the vertical direction of the intermediate die 70 according to the third embodiment.

[0101] The rotating frame 710 in the mold part 71 is a metal frame that rotates by the rotating shaft 800. The rotating frame 710 is composed of a first side portion 711, a second side portion 712, an upper side portion 713 and a lower side portion 714, which are metal plates, and they are connected by bolts and the like to form a frame. Plates 716 and unillustrated plates are installed on the rotating frame 710. The plates 716 become a non-rotating structure. In contrast, the unillustrated plates become a structure that rotates together with the rotating frame 710 if the rotating frame 710 rotates.

[0102] A shaft 77 is mounted on the upper side 713 of the rotating frame 710 via a bearing 717 formed by a support or the like. A shaft 78 is mounted on the lower side 714 of the rotating frame 710 via a bearing 718 formed by a support or the like. In the mold section 71, when the rotating frame 710 rotates via the rotating shaft 800, the plates (not shown) mounted on the rotating frame 710 rotate together with it and rotate by contacting with the fixed side mold 30 (refer to Figure 1 ) is performed by closing the mold to perform injection molding (injection molding) and the position is controlled by the movable side mold 20 (reference Figure 1 )'s mold closing action for blow molding while rotating and moving between the positions.

[0103] A through hole 731 is provided in the support member 73 in the support portion 72, which penetrates in the opening and closing direction. The through hole 731 is a through hole for sliding a connecting rod (not shown) that guides the mold opening and closing operation of the intermediate mold 70 and the fixed side mold 30 and the mold opening and closing operation of the intermediate mold 70 and the movable side mold 20. The through hole 731 is formed near each end of the upper side and the lower side of the support member 73 in the up-down direction.

[0104] A through hole 741 is provided in the support member 74 in the support portion 72, which penetrates in the opening and closing direction. The through hole 741 is a through hole for sliding a connecting rod (not shown) that guides the mold opening and closing operation of the intermediate mold 70 and the fixed side mold 30 and the mold opening and closing operation of the intermediate mold 70 and the movable side mold 20. The through hole 741 is formed near each end of the upper side and the lower side of the support member 74 in the up-down direction.

[0105] The support member 75 in the support portion 72 is a member disposed on the upper side of the support members 73 and 74. The support member 75 has a fixing member 751 and fixes the shaft body 77 mounted on the upper side portion 713 of the rotating frame 710 via the bearing 717. The support member 75 can be detachably connected to the support members 73 and 74 by bolts or the like, or can be joined by welding or the like. A recessed portion 753 is formed on the upper side surface 752 of the support member 75. The recessed portion 753 forms a space capable of accommodating a portion of the rotation drive unit 79.

[0106] The support member 76 in the support portion 72 is a member disposed on the lower side of the support members 73 and 74, and positions the support members 73 and the support members 74. The support member 76 has a fixing member 761, and supports the rotating frame 710 via a shaft 78 mounted on the lower side portion 714 of the rotating frame 710. The support member 76 can be detachably fixed to the support member 73 and the support member 74 by bolts or the like, or can be joined by welding or the like. A through hole 762 for passing the pipe 300 is provided on the support member 76.

[0107] The shaft body 77 is a member that can rotate the rotating frame body 710 by the rotating shaft 800 in a state where the rotating frame body 710 is mounted on the upper side portion 713 of the rotating frame body 710 via the bearing 717. The shaft body 77 is fixed to the support portion 72 by the fixing member 751 of the support member 75 of the support portion 72. The shaft body 78 is a member that can rotate the rotating frame body 710 by the rotating shaft 800 in a state where the rotating frame body 710 is mounted on the lower side portion 714 of the rotating frame body 710 via the bearing 718. The shaft body 78 is fixed to the support member 76 by the fixing member 761 of the support member 76 of the support portion 72. A hollow portion 802 in which a pipe can be arranged, and inlets and outlets 821 and 822 of the pipe are formed in the shaft body 78. The pipe 300 arranged in the hollow portion 802 is arranged so as to extend to the outside of the intermediate mold 70 through the inlet and outlet 822 formed at the end portion of the lower side of the shaft body 78 and the through hole 762 of the support member 76. The pipe 300 extending to the outside of the intermediate mold 70 is connected to various devices constituting the injection molding machine 100 (for example, a device for controlling the circulation of a refrigerant).

[0108] The rotation drive unit 79 includes a rotation force generating unit 791 that generates a rotation force, and a rotation force transmitting unit 792 that transmits the rotation force generated in the rotation force generating unit 791 to the rotating frame 710 to rotate the rotating frame 710. The rotation force generating unit 791 is composed of a motor, etc. The rotation force transmitting unit 792 is composed of a gear box, etc.

[0109] In the rotation drive unit 79, the rotation force of the rotation force generating unit 791 is transmitted to the rotating frame 710 via the rotation force transmitting unit 792 as a rotation force transmitting mechanism, thereby rotating the rotating frame 710. The rotation force generating unit 791 is composed of a motor, etc. The rotation force transmitting unit 792 is composed of a gear box, etc. In the rotation drive unit 79, the rotation force of the rotation force generating unit 791 is transmitted to the rotating frame 710 via the rotation force transmitting unit 792 as a rotation force transmitting mechanism, thereby rotating the rotating frame 710. That is, the rotation force transmitting unit 792 rotates the rotating frame 710 by converting the rotation direction of the rotating shaft 900 of the rotation force generating unit 791 into the rotation direction of the rotating shaft 800.

[0110] The rotational force generating portion 791 in the rotation driving portion 79 according to the third embodiment is arranged at a position offset from the rotation axis 800 to the first side on the upper surface 752 of the support member 75, and the rotational force transmitting portion 792 is arranged on an extension line of the rotation axis 800. Specifically, the rotational force generating portion 791 is arranged in a state where a portion is accommodated in a recessed portion 753 formed on the upper surface 752 of the support member 75.

[0111] Fig. 9 This is a cross-sectional view showing an example of the structure of an intermediate mold of a mold device mounted on a conventional injection molding machine.

[0112] Fig. 9 The conventional intermediate mold shown in the figure comprises: a rotating frame body, on which a mold plate is mounted; a shaft body, which is respectively mounted on the upper side and the lower side of the rotating frame body via bearings not shown; a support frame, which fixes the shaft body; and a motor, which applies a rotational force to the rotating frame body via a connecting portion. Fig. 9 The rotating shaft shown rotates together with the plates not shown. Fig. 9 The rotation axis shown is the same as the above Figure 8 The rotation axis 800 is in the same direction as the rotation axis.

[0113] If the above Figure 8 The length d4 in the vertical direction of the intermediate die 70 according to the third embodiment shown is Fig. 9 Compared with the length d5 ​​of the conventional intermediate mold in the direction of the rotation axis, d4<d5. Figure 8As shown, the rotation drive unit 79 according to the third embodiment is provided with a rotation force generating unit 791 at a position offset from the extension line of the rotation axis 800 in the radial direction of the rotation axis 800, and a part of the rotation force generating unit 791 is accommodated in the recessed portion 753 of the support member 75. Thus, the length d4 of the intermediate mold 70 in the vertical direction is shorter than the length d5 ​​of the conventional intermediate mold in the rotation axis direction.

[0114] As described above, the intermediate mold, the mold device, and the injection molding machine according to the third embodiment to which the present invention is applied can adopt various embodiments as long as the following structures are adopted.

[0115] That is, the intermediate mold 70 involved in the third 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 includes: a mold part 71, which performs mold opening and closing actions with the opposite molds in the fixed side mold 30 and the movable side mold 20; a rotating frame 710, which rotates together with the mold part 71 through the rotating shaft 800; a supporting part 72, which supports both sides of the rotating frame 710 via shafts 77 and 78; and a rotating drive part 79, which transmits the rotational force to the rotating frame 710, and the supporting part 72 accommodates at least a part of the rotating drive part 79.

[0116] Here, the shafts 77 and 78 are respectively installed on both sides of the rotating frame 710 in the up-down direction, and the support portion 72 can support the upper side and the lower side of the rotating frame 710 via the shafts 77 and 78 .

[0117] Thereby, the dimension of the middle die 70 in the vertical direction can be made compact in the form of rotating the rotating frame 710 by the rotating shaft 800 extending in the vertical direction.

[0118] Furthermore, the rotation drive unit 79 may be connected to the upper side of the rotating frame 710 , and the pipe 300 may be arranged in the shaft 78 attached to the lower side of the rotating frame 710 .

[0119] This allows the pipe to be extended to the lower side where the rotation drive unit 79 is not arranged. As a result, when fluid leaks from the pipe, the probability of fluid leaking upward can be reduced due to the relationship between the route of the pipe and the relaxation method.

[0120] <Modification>

[0121] The first to third embodiments described above may be modified as follows, or may not be modified.

[0122] For example, in the first and second embodiments described above, a part of the rotational force transmission part in the rotation driving part is accommodated in the recessed part of the support member, but the present invention is not limited to this. The entire rotational force transmission part may also be accommodated in the recessed part of the support member. Furthermore, a part or the entire rotational force generating part may be accommodated in the recessed part of the support member. Figure 8 The recessed portion 753 formed in the support portion 72 according to the third embodiment shown is not deep enough to accommodate the entire rotational force generating portion 791. However, when the length of the support portion 72 in the vertical direction is greater than the length of the rotational force generating portion 791 in the vertical direction, a part or the entire rotational force generating portion 791 can be accommodated in the recessed portion.

[0123] Furthermore, in the first to third embodiments described above, as a rotational force transmission mechanism for transmitting the rotational force of the rotational force generating unit to the shaft body, a gear mechanism including a gear box composed of a plurality of gears is used, but the present invention is not limited thereto. For example, a mechanism composed of one or more belts and a disc-shaped member for transmitting the rotational force from the belt to the rotating shaft, i.e., one or more pulleys (hereinafter referred to as a "belt mechanism") may be used as the rotational force transmission mechanism.

[0124] Here, if the gear mechanism is compared with the belt mechanism, the gear mechanism transmits the rotational force by meshing the gears and other mechanical parts, while the belt mechanism transmits the rotational force by the friction between the belt and the pulley. Therefore, the belt mechanism sometimes causes slippage between the belt and the pulley, resulting in a transmission loss of the rotational force. However, even if a failure occurs in the process of power transmission, the belt mechanism can smoothly absorb its influence to a certain extent, so it can be said that it is superior in terms of driving stability. Moreover, in terms of strength, the gear mechanism is superior to the belt mechanism. In addition, in the belt mechanism, there is also a belt mechanism in which the teeth formed on the belt side are meshed with the teeth formed on the pulley side, but it does not have the strength of the gears of the gear mechanism.

[0125] Furthermore, as a rotational force transmission mechanism, a gear mechanism and a belt mechanism may be used together. For example, when the belt mechanism is housed in a recess of a supporting member, since the belt needs to be wound on both the transmission side and the transmission side of the rotational force, the size of the recess must be increased compared to the case where the gear mechanism is housed in the recess. Therefore, it is preferred that the portion housed in the recess is provided as a gear mechanism, and the portion not housed in the recess is provided as a belt mechanism. In addition, the rotational force transmission mechanism may be integrated by housing the gear mechanism and the belt mechanism in one housing, or they may not be housed in one housing.

[0126] Specifically, for example, in the above Figure 7In the second embodiment shown, since the axis of the rotational force generating portion 591 is offset from the axis of the rotational force transmitting portion 592, it is preferable to use a gear mechanism and a belt mechanism together as the rotational force transmitting portion 592. In this case, the gear mechanism is arranged in the recess 543 to achieve compactness of the intermediate mold 50, and the belt mechanism is arranged outside the recess 543 to smoothly absorb the influence of a failure that may occur during the power transmission process.

[0127] Furthermore, in the first and second embodiments described above, the second shaft portion 18 includes the flow divider 184 as a component element, but the present invention is not limited thereto, and the flow divider may be included as a component element of the first shaft portion 17 .

[0128] Furthermore, in the first and second embodiments described above, the rotation drive unit is disposed on the second side in the direction of the rotation axis, but the present invention is not limited thereto. The rotation drive unit may also be disposed on the first side in the direction of the rotation axis. Figure 1 The side where the rotation drive unit is arranged is determined by the position where an operation panel (not shown) is arranged in the injection molding machine 100 or the ease of operation for the operator.

Claims

1. An intermediate mold, which is an intermediate mold arranged between a fixed side mold and a movable side mold in a mold device of an injection molding machine, characterized in that: have: A mold section that performs mold opening and closing actions with the opposing molds of the fixed side mold and the movable side mold; A rotating frame body rotates together with the mold part via a rotating shaft; A supporting part, supporting both sides of the rotating frame via an axle; and The rotation driving unit transmits the rotation force to the rotating frame. The support portion accommodates at least a portion of the rotation drive portion.

2. The intermediate mold according to claim 1, characterized in that: The support portion is formed with a recessed portion for accommodating at least a portion of the rotation drive portion.

3. The intermediate mold according to claim 2, characterized in that: The recessed portion is formed at a position offset from an extension line of the rotation axis in a radial direction of the rotation axis.

4. The intermediate mold according to claim 3, characterized in that: The recessed portion is formed at a position offset upward in the vertical direction from an extension line of the rotation axis.

5. The intermediate mold according to claim 4, characterized in that: At least a part of a rotational force transmission mechanism of the rotation drive unit that transmits the rotational force to the rotation frame is accommodated in the recessed portion.

6. The intermediate mold according to claim 5, characterized in that: The rotational force transmission mechanism is a gear mechanism that links a plurality of gears.

7. The intermediate mold according to claim 1, characterized in that: A portion of the rotation drive unit is disposed on an extension line of the rotation axis.

8. The intermediate mold according to claim 1, characterized in that: The shaft body has a hollow portion in which a pipe through which a fluid can pass can be arranged.

9. The intermediate mold according to claim 8, characterized in that: Inlet and outlet ports that allow the pipe to enter and exit in the direction of the rotation axis of the shaft body are formed at both ends of the hollow portion.

10. The intermediate mold according to claim 9, characterized in that: The shaft body is respectively installed on both sides of the rotating axis direction of the rotating frame body via bearings. The rotation drive unit and the pipe are arranged on one side of the shaft body.

11. The intermediate mold according to claim 1, characterized in that: The shaft is installed on both sides of the rotating frame in the up and down directions via bearings. The support portion supports the upper side and the lower side of the rotating frame via the shaft body.

12. The intermediate mold according to claim 11, characterized in that: The rotation drive unit is connected to the upper side of the rotation frame, and a pipe through which a fluid passes is arranged in a shaft body attached to the lower side of the rotation frame.

13. A mold device, which is a mold device of an injection molding machine, characterized in that: The intermediate mold disposed between the fixed side mold and the movable side mold has: A mold section that performs mold opening and closing actions with the opposing molds of the fixed side mold and the movable side mold; A rotating frame body rotates together with the mold part via a rotating shaft; A supporting part, supporting both sides of the rotating frame via an axle; and The rotation driving unit transmits the rotation force to the rotating frame. The support portion accommodates at least a portion of the rotation drive portion.

14. An injection molding machine equipped with a mold device, wherein the mold device is composed 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 injection molding machine is characterized in that: The intermediate mold has: A mold section that performs mold opening and closing actions with the opposing molds of the fixed side mold and the movable side mold; The rotating frame rotates together with the mold part through the rotating axis; A supporting part, supporting both sides of the rotating frame via an axle; and The rotation driving unit transmits the rotation force to the rotation frame, and the support portion accommodates at least a part of the rotation driving unit.

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