Frame of injection molding machine and injection molding machine

Abstract

The invention relates to a frame of an injection molding machine and the injection molding machine, which can improve the rigidity and the strength of the frame relative to the force generated by opening and closing a mold in the injection molding machine and enabling the cross section of a beam part of the frame to deform. The frame of the injection molding machine is used for supporting a mold closing device which enables a movable pressing plate to move in the horizontal direction relative to a fixed pressing plate so as to enable a mold to be opened and closed in the horizontal direction and an injection device for injecting molten materials, and comprises a beam part in the length direction of the fixed pressing plate, the beam member has a plate-shaped first member and a groove-shaped second member having an upward opening, the second member is a member to which the first member is joined on the upper side so as to close the opening, and the frame of the injection molding machine has a reinforcing structure. The reinforcing structure reinforces a predetermined region surrounded by the first member and the second member below the fixed platen in order to suppress cross-sectional deformation of the beam member caused by opening and closing of the mold.

Description

Technical Field

[0001] This application claims priority based on Japanese Patent Application No. 2023-192064 filed on November 10, 2023. The entire contents of this Japanese application are incorporated herein by reference.

[0002] The invention relates to a frame of an injection molding machine and the injection molding machine. Background Art

[0003] Patent document 1 describes a base frame, which is used in an injection molding machine equipped with a clamping device having a pressure plate, and at least carries and supports the clamping device, and comprises: a pair of main beams, which are located at intervals from each other in the width direction of the base frame and are arranged and extended along the length direction of the base frame; a pair of frame bases, which are arranged at intervals from the main beams on the frame setting surface sides of each of the pair of main beams and extend along the length direction; and pillars, which are arranged between the main beams and the frame bases.

[0004] Patent document 2 describes an injection molding machine, which includes: a mold clamping device for closing, clamping and opening a mold device; an injection device for filling a molding material into the mold device; and a frame for supporting at least one of the mold clamping device and the injection device, the frame having a beam and a reinforcing member connected to the beam.

[0005] Patent document 3 describes a base for an injection molding machine, which is used in an injection molding machine and has two side frames extending parallel to the axis of a driving actuator as main parts, wherein the side frames include: a lower flange supported by a machine table or a foundation; an upper flange arranged parallel to the lower flange; at least two webs connecting the upper flange and the lower flange; and a web reinforcement member penetrating and fixed to these webs.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-160249

[0007] Patent Document 2: Japanese Patent Application Publication No. 2016-193519

[0008] Patent Document 3: Japanese Patent Application Publication No. 2019-005948

[0009] In an injection molding machine, when the mold is opened and closed in the horizontal direction, acceleration is generated in the mold, and its reaction force is transmitted to the fixed platen. As a result, the fixed platen generates a force that deforms the cross section of the beam component of the frame of the injection molding machine. If the cross section of the beam component is deformed by this force, problems may arise related to the vibration of the fixed platen and the strength of the joint of the cross section of the beam component. Summary of the invention

[0010] An object of the present invention is to improve the rigidity and strength of a frame against a force that deforms the cross section of a beam member of the frame due to opening and closing of a mold in an injection molding machine.

[0011] According to this purpose, the present invention provides a frame of an injection molding machine, which supports a clamping device for opening and closing a mold in a horizontal direction by moving a movable platen in a horizontal direction relative to a fixed platen, and an injection device for injecting molten material. The frame of the injection molding machine includes a beam component in the length direction of which a fixed platen is installed, the beam component having a plate-shaped first component and a groove-shaped second component having an opening portion facing upward, the second component being a component joined to the first component on the upper side in a manner to close the opening portion, the frame of the injection molding machine having a reinforcement structure, and the reinforcement structure reinforces a specified area surrounded by the first component and the second component below the fixed platen in order to suppress deformation of the cross section of the beam component caused by opening and closing of the mold.

[0012] First, the reinforcement structure may be a structure for reinforcing a predetermined area by adding a reinforcement member in the predetermined area.

[0013] In this case, the reinforcing member may be a rod-shaped member provided in the vertical direction just below the portion of the first member to which the load is applied.

[0014] Furthermore, the reinforcing member may be a diagonal brace provided between the first member and a member in the vertical direction included in the second member.

[0015] Furthermore, the reinforcing member may be a plate-shaped member provided in parallel with the cross section of the beam member. Furthermore, the plate-shaped member may be provided just below a mounting member for mounting the fixed platen on the first member.

[0016] Furthermore, the reinforcing member may be a plurality of plate-like members provided in parallel with the cross section of the beam member, and a connecting member connecting the plurality of plate-like members.

[0017] Here, the plate-like member may be provided with a notch for avoiding interference with a joining member for joining the first member and the second member or a passing member passing through the beam member in the longitudinal direction.

[0018] Secondly, the reinforcement structure may be a structure in which the predetermined region is reinforced by making the thickness of the member in the vertical direction included in the second member thicker in the predetermined region than outside the predetermined region.

[0019] In this case, the second component may be a component formed by joining a third component located within the prescribed area and including a component having a first thickness in the vertical direction, and a fourth component located outside the prescribed area and including a component having a second thickness in the vertical direction that is thinner than the first thickness. Furthermore, the joining surface between the third component and the fourth component may be arranged to be inclined with respect to the longitudinal direction.

[0020] Furthermore, the present invention further provides an injection molding machine, which includes a clamping device for opening and closing a mold in a horizontal direction by moving a movable platen in a horizontal direction relative to a fixed platen, an injection device for injecting molten material, and a frame supporting the clamping device and the injection device, wherein the frame includes a beam member in a length direction on which the fixed platen is mounted, the beam member having a plate-shaped first member and a groove-shaped second member having an opening portion facing upward, the second member being a member joined to the first member on the upper side in a manner that closes the opening portion, and the frame having a reinforcement structure that reinforces a specified area surrounded by the first member and the second member below the fixed platen in order to suppress deformation of the cross section of the beam member caused by the opening and closing of the mold.

[0021] Effects of the Invention

[0022] According to the present invention, the rigidity and strength of the frame can be improved with respect to the force that deforms the cross section of the beam member of the frame due to the opening and closing of the mold in the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side view of the injection molding machine to which this embodiment is applied.

[0024] Figure 2 yes Figure 1 Enlarged view within the thick frame A.

[0025] Figure 3 is along Figure 1 Cross-sectional view taken along line III-III.

[0026] Figure 4 This is a diagram showing the force transmission path when the mold is opened and closed in the injection molding machine.

[0027] Figure 5 This is a diagram showing the force acting on the frame when the mold is opened and closed.

[0028] Figure 6 It is a diagram showing a state where the cross section of a beam is deformed.

[0029] Figure 7 It is a diagram showing a first structural example of the first embodiment.

[0030] Figure 8It is a diagram showing a second structural example of the first embodiment.

[0031] Fig. 9 It is a diagram showing a third structural example of the first embodiment.

[0032] Fig. 10A (a) and (b) are diagrams showing a fourth structural example of the first embodiment.

[0033] Fig. 10B (a) and (b) are diagrams showing modified examples of the fourth structural example of the first embodiment.

[0034] Fig.11A (a) and (b) are diagrams showing the fifth structural example of the first embodiment.

[0035] Fig. 11B (a) to (c) are diagrams showing reinforcing members used in the fifth structural example of the first embodiment.

[0036] Fig. 12A (a) and (b) are diagrams showing the sixth structural example of the first embodiment.

[0037] Fig. 12B (a) to (c) are diagrams showing reinforcing members used in the sixth structural example of the first embodiment.

[0038] Fig.13 (a) to (c) are diagrams showing a first structural example of the second embodiment.

[0039] Fig.14 (a) to (d) are diagrams showing a reinforcing member used in a first structural example of the second embodiment.

[0040] Fig.15 This is a diagram showing the influence range of stress caused by vertical load.

[0041] Fig.16 (a) to (c) are diagrams showing a second structural example of the second embodiment.

[0042] Fig.17 (a) to (d) are diagrams showing a reinforcing member used in a second structural example of the second embodiment.

[0043] Fig.18 This is a diagram showing the effect of saving steel materials when a box-shaped cross section of a beam is manufactured by the second structural example of the second embodiment.

[0044] Explanation of symbols

[0045] 1-injection molding machine, 10-mold clamping device, 11-mold, 12-fixed pressure plate, 13-movable pressure plate, 14-connecting rod mechanism, 15-toggle seat, 20-injection device, 30-control device, 40-frame, 50, 60-beam, 51-upper flange, 52-lower flange, 53, 531, 532, 534, 535-web, 533, 536-joining surface, 54-bundle component, 55-diagonal brace, 56, 57, 58, 61-partition wall, 59, 62-connecting plate, 71, 72, 73, 74, 75-column, 80-mounting bolt. DETAILED DESCRIPTION

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0047] [Structure of injection molding machine]

[0048] Figure 1 It is a side view of the injection molding machine 1 to which this embodiment is applied.

[0049] As shown in the figure, the injection molding machine 1 includes a mold clamping device 10 , an injection device 20 , a control device 30 , and a frame 40 .

[0050] The mold clamping device 10 is a device for opening and closing the mold 11, and is tightened in such a way that the high-pressure molten material (for example, molten resin) injected into the mold 11 does not push the mold 11 open. The mold 11 is mounted on a fixed platen 12 and a movable platen 13, and is opened and closed in a horizontal direction and in the longitudinal direction of the injection molding machine 1 (hereinafter referred to as the "longitudinal direction") in conjunction with the movement of the movable platen 13. That is, the mold 11 is opened by moving the movable platen 13 to the first side in the longitudinal direction, and is closed by moving the movable platen 13 to the second side in the longitudinal direction. In addition, the mold clamping device 10 also includes a link mechanism 14 that transmits a driving force to the movable platen 13 and a toggle seat 15 that supports the link mechanism 14.

[0051] The injection device 20 is a device that injects a molten material (for example, molten resin).

[0052] The control device 30 is a device that is disposed inside the frame 40 and controls the mold clamping device 10 and the injection device 20 .

[0053] The frame 40 is a structure having a roughly rectangular skeleton formed by combining a plurality of columns and beams, and includes beams 50, 60 in the length direction and columns 71 to 75 in the vertical direction. When viewed from the length direction, the frame 40 is roughly rectangular. That is, sometimes the beams 50, 60 and columns 71 to 75 are respectively arranged on the front side and the back side of the depth direction of the figure, that is, the width direction of the injection molding machine 1 (hereinafter referred to as the "width direction"). In addition, sometimes a support surface is provided between the beam 50 on the front side and the beam 50 on the back side. At this time, the frame 40 supports the clamping device 10 and the injection device 20 arranged on the upper side in the vertical direction through the support surface. In addition, the frame 40 accommodates the control device 30 inside.

[0054] Figure 2 yes Figure 1 Enlarged view within the thick frame A. Figure 3 is along Figure 1 Cross-sectional view taken along line III-III.

[0055] The figure shows a part of the fixed platen 12 and a part of the beam 50 near the front side in the width direction. The fixed platen 12 is often fastened to the beam 50 by the mounting bolts 80 and mounted on the frame 40. In addition, as the beam 50 to which the fixed platen 12 is mounted, a beam having a box-shaped cross section made by welding four metal plates is sometimes used. Hereinafter, among the four metal plates, the metal plate in the upper horizontal direction is referred to as an upper flange 51, the metal plate in the lower horizontal direction is referred to as a lower flange 52, and the metal plates in the vertical direction near the front side and the inner side are referred to as webs 53.

[0056] In addition, here, the beam 50 is set as a beam with a box-shaped cross section made by welding four metal plates, but it is not limited to this. The beam 50 can also be a beam with a box-shaped cross section made by welding a metal plate and a groove-shaped member having an opening toward the top in a manner that the former closes the opening of the latter. Here, the groove-shaped member can be a member made by bending a metal plate, or a member made by welding an L-shaped member made by bending a metal plate to another metal plate. And, here, the joining method is set as welding, but other joining methods such as bolt fastening can also be used. At this time, a metal plate, that is, the upper flange 51 is an example of a plate-shaped first member. And, the groove-shaped member, that is, the member corresponding to the lower flange 52 and the web 53 is an example of a groove-shaped second member having an opening toward the top, and the second member is a member joined to the first member on the upper side in a manner that closes the opening. And, the web 53 is an example of a member in the vertical direction included in the second member.

[0057] [Background of the present embodiment]

[0058] Figure 4 It means in Figure 1FIG. 1 is a diagram of the force transmission path when the mold 11 is opened and closed in the injection molding machine 1. As shown in the figure, first, acceleration is generated in the mold 11 (S1). If acceleration is generated, the reaction force is transmitted to the toggle seat 15 through reaction (S2). The toggle seat 15 and the fixed platen 12 are connected by a rod called a connecting rod (not shown), so the force borne by the toggle seat 15 is transmitted to the fixed platen 12 via the connecting rod (S3). Then, the force transmitted to the fixed platen 12 causes the fixed portion with the frame 40 to generate a torque corresponding to the distance from the fixed portion with the frame 40 (S4).

[0059] Figure 5 1 is a diagram showing the forces acting on the frame 40 when the mold 11 is opened and closed. Figure 4 The moment shown in FIG. 5 is transmitted to the frame 40 as vertical couple forces F1 and F2 via the mounting bolts 80 for mounting the fixed platen 12 to the beam 50 .

[0060] Figure 6 2 is a diagram showing a state in which the cross section of the beam 50 is deformed. Figure 5 The cross section of the beam 50 supporting the fixed platen 12 may be deformed as shown in the figure due to the couple force F1 shown. That is, the upper flange 51 may be pulled upward and bent due to the couple force F1, thereby deforming the upper part of the web 53 in an open manner. Figure 5 In the case of the couple force F2 shown, although not shown, the upper flange 51 may deform to bend downward. If the cross section of the beam 50 is deformed in this way, it may cause vibration problems of the fixed platen 12 and strength problems of the welded parts constituting the box section.

[0061] In order to suppress this deformation, it is effective to increase the thickness of the metal plate constituting the box section. Figure 1 As can be seen, the portion supporting the fixed platen 12 is a very small area relative to the span of the beam 50 , and it is not economical to increase the thickness of the beam 50 uniformly.

[0062] Therefore, in the present embodiment, a reinforcement structure for reinforcing the cross section near the fixed platen 12 is provided with respect to the frame 40 of the injection molding machine 1. This can be understood as a reinforcement structure for reinforcing the prescribed area surrounded by the first component and the second component below the fixed platen in order to suppress the cross-sectional deformation of the beam component caused by the opening and closing of the mold. Here, when reinforcing the cross section, it is preferred to selectively reinforce the prescribed area surrounded by the first component and the second component below the fixed platen, rather than reinforcing the entire prescribed area. Here, the so-called selective reinforcement means that, for example, in the case of reinforcing the cross section by adding a reinforcement component, the reinforcement component is not arranged throughout the entire length direction in the prescribed area, but only in a part, and there is an area where the reinforcement component is not arranged. In addition, the selectively arranged part is preferably an area connected to the fixed platen. For example, when fixing by bolts, etc., there are parts connected to the fixed platen and parts not connected in the connected area, it is preferred to overlap with the connected part. When there are a plurality of joined sites, it is preferred that the site at one end overlaps with the site at the other end.

[0063] The idea of ​​selectively reinforcing the cross section near the fixed platen 12 is as follows.

[0064] First, considering the force transmission method when no reinforcement is performed, a load in the vertical direction is applied to the upper flange 51 , and thus the load is transmitted to the web 53 as bending (out-of-plane load).

[0065] However, deformation and stress tend to become larger in the case of bending than in tension (in-plane load). Therefore, the force is not transmitted to the web 53 as bending (out-of-plane load) but is transmitted to the web 53 as tension (in-plane load) as much as possible. In this case, the reinforcement structure becomes a structure in which the prescribed area is reinforced by selectively adding reinforcement components to the prescribed area instead of the entire area within the prescribed area, that is, adding reinforcement components only to a part of the prescribed area instead of the entire area.

[0066] Furthermore, as described above, although increasing the thickness of the metal plate is effective, the above-mentioned deformation is localized, so it is not economical to increase the thickness uniformly. Therefore, instead of increasing the thickness uniformly, only the thickness of the metal plate below the fixed platen 12 is increased. In this case, the reinforcement structure becomes a structure in which the thickness of the vertically oriented member included in the second member in the predetermined region is thicker than the thickness outside the predetermined region, thereby reinforcing the predetermined region.

[0067] Hereinafter, the former reinforcement structure will be described as a first embodiment and the latter reinforcement structure will be described as a second embodiment.

[0068] [First embodiment]

[0069] Figure 7 It is a diagram showing a first structural example of the first embodiment.

[0070] As shown in the figure, in the first structural example, a bundle-shaped member 54 is provided just below the portion of the upper flange 51 to which the load is applied. At this time, the load applied to the upper flange 51 is transmitted as indicated by the thick arrow B1. In addition, the bundle-shaped member 54 and the lower flange 52 cannot be welded, but can be joined by other methods (such as bolts). The bundle-shaped member 54 is an example of a rod-shaped member provided in the vertical direction just below the portion of the first member to which the load is applied.

[0071] Figure 8 It is a diagram showing a second structural example of the first embodiment.

[0072] As shown in the figure, in the second structural example, there are provided a diagonal brace 55 on the near front side between the upper flange 51 and the web 53 on the near front side, and a diagonal brace 55 on the inner side between the upper flange 51 and the web 53 on the inner side. At this time, the load applied to the upper flange 51 is transmitted in the manner shown by the thick arrow B2. That is, the effect can also be expected by providing the diagonal brace 55, but each web 53 receives the load at one point, and thus receives the bending force, so that the effect is limited. The diagonal brace 55 is an example of a diagonal brace provided between the vertically-directed components included in the first component and the second component.

[0073] Fig. 9 It is a diagram showing a third structural example of the first embodiment.

[0074] As shown in the figure, in the third structural example, a plate-like member, namely a bulkhead 56, is provided in a manner connected to the upper flange 51, the web 53 on the near front side, and the web 53 on the back side. At this time, the load applied to the upper flange 51 is transmitted in a manner shown by the thick arrow B3. That is, by providing the bulkhead 56, the force can be transmitted to the web 53 and the lower flange 52 as an in-plane load. In addition, considering the construction sequence of first welding the bulkhead 56 to the upper flange 51 and the web 53, and then joining the lower flange 52 thereto, there is a gap between the bulkhead 56 and the lower flange 52. The bulkhead 56 is an example of a plate-like member provided parallel to the cross section of the beam member.

[0075] Fig. 10A (a) and (b) are diagrams showing a fourth structural example of the first embodiment.

[0076] As shown in the figure, in the fourth structural example, one or more partition walls 57 which are plate-like members are provided in the middle of the box-shaped cross section of the beam 50 in a direction parallel to the box-shaped cross section.

[0077] The location of the partition wall 57 is not limited, but if it is set close to the position directly below the mounting bolt 80, the reinforcement effect is higher. Fig. 10A In (a), a partition wall 57a is provided directly below the mounting bolt 80a, and a partition wall 57c is provided directly below the mounting bolt 80c. That is, no partition wall is provided directly below the mounting bolt 80b. This is because the couple force transmitted to the frame 40 via the mounting bolts 80a and 80c is greater than the couple force transmitted to the frame 40 via the mounting bolts 80b. The partition wall 57 is an example of a plate-like member provided parallel to the cross section of the beam member. Moreover, this structure is an example of a structure in which a plate-like member is provided directly below a mounting member for mounting the fixed platen on the first member. Similarly, in a case where the fixed platen 12 is fixed to the frame 40 using four or more mounting bolts 80, it is effective to arrange the partition wall 57 directly below the mounting bolts 80 at both ends.

[0078] And, if Fig. 10A As shown in (b), the partition wall 57 is provided with a notch 571 for avoiding interference with the weld constituting the box-type structure and a notch 572 for avoiding interference with the mounting bolts 80. However, the objects to be avoided from interference are not limited to the weld and the mounting bolts 80, but may also be other joining parts. Furthermore, the partition wall 57 may be provided with a notch 574 for avoiding interference with passing parts such as piping and wiring that pass through the beam 50 in the length direction. This structure is an example of a structure in which a notch is provided on a plate-like part for avoiding interference with a joining part for joining the first part and the second part or a passing part that passes through the beam part in the length direction.

[0079] In addition, if Fig. 10A As shown in (b), the position of the mounting bolt 80 (load point) is not limited to the center of the cross section, so the reinforcement on the near front side and the back side may not be symmetrical. For example, the reinforcement component may be provided only on one side with the mounting bolt 80 as the boundary.

[0080] For example, Fig. 10B As shown, in the case where there is a mounting bolt 80 for fixing the pressure plate 12 at a position offset from the center of the cross section of the beam 50 toward one web 53, Figure 5 The forces F1 and F2 are mainly transmitted to the lower part of the frame 40 through the web 53 near the side of the mounting bolt 80. Fig. 10B As shown in (b), by joining the reinforcing member 575 only to the web 53 on the side away from the mounting bolt 80, the web 53 is also subjected to force, thereby relieving the deformation and stress of the web 53 on the side close to the mounting bolt 80. Fig. 9In order to prevent the flow of force, the reinforcing member 575 can also cut off the area where the force does not flow. In addition, if the plate thickness of the web 53 joined by the reinforcing member 575 is greater than the plate thickness of the other web 53, the force can be more effectively borne. In this case, the plate thickness of the web 53 can also be increased by the second embodiment described later.

[0081] Fig.11A (a) and (b) are diagrams showing the fifth structural example of the first embodiment.

[0082] As shown in the figure, in the fifth structural example, two or more partition walls 58 are provided in the box-shaped cross section of the beam 50, and the partition walls 58 are connected to each other by a connecting plate 59, which is a plate-like member in the longitudinal direction. Fig.11A In (a), a partition wall 58a is provided at a position closer to the first side in the longitudinal direction than directly below the mounting bolt 80a, and a partition wall 58c is provided at a position closer to the second side in the longitudinal direction than directly below the mounting bolt 80c, and the partition walls 58a and 58c are connected by a connecting plate 59. In this fifth structural example, when a partition wall cannot be provided directly below the mounting bolt 80, an improvement in the reinforcement effect can be expected. The partition walls 58a and 58c are examples of a plurality of plate-like members provided parallel to the cross section of the beam member, and the connecting plate 59 is an example of a connecting member connecting the plurality of plate-like members.

[0083] Furthermore, in the fifth structural example, Fig.11A As shown in (b), a notch 581 for avoiding interference with the weld constituting the box-type structure may be provided on the partition wall 58. However, the object to be avoided from interference is not limited to the weld, but may also be other joining parts. Furthermore, in order to avoid interference with passing parts such as piping and wiring that pass through the beam 50 in the length direction, a notch different from the notch 581 may be provided on the partition wall 58. This structure is an example of a structure in which a notch for avoiding interference with a joining part for joining a first part and a second part or a passing part that passes through a beam part in the length direction is provided on a plate-like part.

[0084] Furthermore, in the fifth structural example, although not shown in the figure, a notch may be provided in the connecting plate 59 for avoiding interference with joining parts such as welds or passing parts such as pipes and wirings.

[0085] Fig. 11B (a) to (c) are diagrams showing reinforcing members used in the fifth structural example of the first embodiment. Fig. 11B (a) shows the partition wall 58 viewed from the longitudinal direction. Fig. 11B (b) shows the connecting plate 59 viewed from the width direction. Fig. 11B(c) shows the reinforcing member connecting the partition walls 58a, 58c and the connecting plate 59 as viewed from the upper side in the vertical direction. This structural example is also similar to the fourth structural example, and the reinforcing member can be an asymmetric shape instead of Fig. 11B A symmetrical shape as shown in (a) to (c).

[0086] Fig. 12A (a) and (b) are diagrams showing the sixth structural example of the first embodiment.

[0087] As shown in the figure, in the sixth structural example, two or more partition walls 61 are provided in the box-shaped cross section of the beam 50, and the partition walls 61 are connected to each other by a connecting plate 62 to form a U-shape. Fig. 12A In (a), a bulkhead 61a is provided at a position closer to the first side in the length direction than directly below the mounting bolt 80a, and a bulkhead 61c is provided at a position closer to the second side in the length direction than directly below the mounting bolt 80c, and the bulkhead 61a and the bulkhead 61c are connected by a connecting plate 62. Moreover, the upper flange 51 and a web 53 are connected by this U-shaped structure. In this sixth structural example, when a bulkhead cannot be provided directly below the mounting bolt 80, an improvement in the reinforcement effect can be expected. The bulkheads 61a and 61c are examples of a plurality of plate-like members provided parallel to the cross section of the beam member, and the connecting plate 62 is an example of a connecting member connecting the plurality of plate-like members.

[0088] Furthermore, in the sixth structural example, Fig. 12A As shown in (b), a notch 611 for avoiding interference with the weld constituting the box-type structure may be provided on the partition wall 61. However, the object to be avoided from interference is not limited to the weld, but may also be other joining parts. Furthermore, in order to avoid interference with passing parts such as piping and wiring passing through the beam 50 in the length direction, a notch different from the notch 611 may be provided on the partition wall 61. Alternatively, the notch 611 may also serve as a notch for avoiding interference with passing parts such as piping and wiring passing through the beam 50 in the length direction. This structure is an example of a structure in which a notch for avoiding interference with a joining part for joining a first part and a second part or a passing part passing through a beam part in the length direction is provided on a plate-like part.

[0089] Furthermore, in the sixth structural example, although not shown in the figure, a notch may be provided in the connecting plate 62 for avoiding interference with joining parts such as welds or passing parts such as pipes and wirings.

[0090] Fig. 12B (a) to (c) are diagrams showing reinforcing members used in the sixth structural example of the first embodiment. Fig. 12B (a) shows the partition wall 61 viewed from the longitudinal direction. Fig. 12B (b) shows the connecting plate 62 viewed from the width direction. Fig. 12B (c) shows a reinforcing member connecting the partition walls 61a and 61c and the connecting plate 62 as viewed from the upper side in the vertical direction.

[0091] As described above, in the injection molding machine 1 of the first embodiment, the beam 50 is reinforced by adding the beam-shaped member 54, the diagonal brace 55, the partition wall 56, the partition wall 57, the partition wall 58 and the connecting plate 59, or the partition wall 61 and the connecting plate 62 to the upper flange 51, the lower flange 52 and the web 53 constituting the beam 50. Thus, the rigidity and strength of the frame 40 can be improved with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1, without changing the existing components constituting the frame 40.

[0092] [Second embodiment]

[0093] Fig.13 (a) to (c) are diagrams showing a first structural example of the second embodiment.

[0094] As shown in the figure, in the first structural example, the web 53 of the box-shaped cross section of the beam 50 is manufactured by butt welding two metal plates having different plate thicknesses instead of one metal plate. Fig.13 In (a), the plate thickness of the web 531 located below the mounting bolt 80 is made thicker than the plate thickness of the web 532 not located below the mounting bolt 80, and they are butt-welded at the joint surface 533. This can be seen from the following content, that is, Fig.13 In the beam 50 viewed from the first side in the longitudinal direction in (b), the web 531 having a thicker plate thickness can be observed on the inner side of the web 532 having a thinner plate thickness. Fig.13 In the beam 50 observed from the second side in the longitudinal direction of (c), the web 532 with a thinner plate thickness is hidden inside the web 531 with a thicker plate thickness and cannot be observed. In this way, by locally thickening the web 53, reinforcement can be reasonably performed even when a partition wall cannot be provided. Moreover, here, the joining method of the web 531 and the web 532 is set as butt welding, but other joining methods may also be used. The web 531 is an example of a third component that is located within a prescribed area and includes a component in the vertical direction of the first thickness, and the web 532 is an example of a fourth component that is located outside the prescribed area and includes a component in the vertical direction of the second thickness that is thinner than the first thickness. Moreover, the web 53 produced by butt welding the web 531 and the web 532 is an example of a component formed by joining the third component and the fourth component.

[0095] Fig.14(a) to (d) are diagrams showing the reinforcing member used in the first structural example of the second embodiment. Fig.14 (a) shows the webs 531 and 532 on the front side when viewed from the width direction. Fig.14 (b) shows the webs 531 and 532 on the front side viewed from the first side in the longitudinal direction. Fig.14 (c) shows the webs 531 and 532 on the front side viewed from the second side in the longitudinal direction (the web 532 is not visible). Fig.14 (d) shows the webs 531 and 532 on the front side when viewed from the upper side in the vertical direction. The webs 531 and 532 are joined via a joining surface 533 .

[0096] Fig.15 This is a diagram showing the influence range of stress caused by vertical load.

[0097] In the figure, as shown in the hatched area R1, the influence range of the vertical load from the mounting bolt 80 gradually expands in the process of being transmitted to the foundation via the box section. Therefore, as in the first structural example, if the length of the portion of the plate thickness of the web 531 is made the same on the upper side and the lower side, the plate thickness of a portion of the upper side (for example, the area R2 surrounded by the dotted line) may not be effectively used.

[0098] Fig.16 (a) to (c) are diagrams showing a second structural example of the second embodiment.

[0099] according to Fig.15 According to the second structural example, the joint surface of two metal plates with different plate thicknesses is butt-welded to be inclined relative to the longitudinal direction. Fig.16 In (a), the plate thickness of the web 534 located below the mounting bolt 80 is made thicker than the plate thickness of the web 535 not below the mounting bolt 80, and they are butt-welded by setting the joint surface 536 inclined relative to the longitudinal direction. Fig.16 (b) The beam 50 and Fig.16 The beam 50 viewed from the second side in the longitudinal direction of (c) is aligned with the beam 50 even if the joint surface is inclined. Fig.13 This structure is an example of a structure in which the joint surface between the third member and the fourth member is inclined with respect to the longitudinal direction.

[0100] Fig.17 (a) to (d) are diagrams showing reinforcing members used in the second structural example of the second embodiment. Fig.17(a) shows the webs 534 and 535 on the front side viewed from the width direction. Here, in the web 531 of the first structural example, the length L of the lower side is kept as it is, and the length of the upper side is subtracted from S to be (LS). Fig.17 (b) The webs 534, 535 and the webs 534, 535 on the front side viewed from the first side in the longitudinal direction Fig.17 The webs 534 and 535 on the front side of (c) viewed from the second side in the longitudinal direction are aligned with the webs 534 and 535 even if the joint surface is inclined. Fig.14 (b) and (c) are the same. Fig.17 (d) shows the webs 534 and 535 on the front side viewed from the upper side in the vertical direction. The webs 534 and 535 are joined by a joint surface 536. Fig.17 In (a), the joint surface 536 is inclined relative to the length direction, but in Fig.17 In (d), only the uppermost portion of the bonding surface 536 in the vertical direction can be observed.

[0101] Fig.18 1 is a diagram showing the effect of saving steel materials when the box-shaped section of the beam 50 is manufactured by the second structural example of the second embodiment. As described above, in the web 534 of the second structural example, one of the length of the upper side and the length of the lower side is shortened by S compared to the web 531 of the first structural example. Therefore, considering that two webs of the same size are required to manufacture one box-shaped section, in the second structural example, compared to the first structural example, it is possible to save steel materials corresponding to the area R3 surrounded by the dotted line in the figure.

[0102] In the second embodiment, the web 53 is made of two metal plates having different plate thicknesses, but the present invention is not limited thereto. The web 53 may be made of one metal plate and the plate thickness of the metal plate may be locally increased.

[0103] As described above, in the injection molding machine 1 of the second embodiment, the beam 50 is reinforced by increasing the thickness of the web 531 or the web 534, one of the two parts of the web 53. This increases the rigidity and strength of the frame 40 against the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1, without adding new parts to the frame 40.

[0104] [Other embodiments]

[0105] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. Furthermore, the effects of the present invention are not limited to the effects described in the above embodiments. For example, Figure 1 to Figure 3The appearance structure of the injection molding machine 1 is not limited thereto. Figure 7 The bundled component 54, Figure 8 The diagonal brace 55, Fig. 9 Next door 56, Fig. 10A (a), (b) next door 57, Fig. 10B The reinforcement components 575 of (a) and (b) Fig.11A (a), (b) and Fig. 11B The partition walls 58 and the connecting plate 59 of (a) to (c) Fig. 12A (a), (b) and Fig. 12B Each of the partition walls 61 and the connecting plate 62 in (a) to (c) is merely an example for achieving the purpose of the present invention and is not particularly limited. Fig.13 (a)~(c) and Fig.14 The webs 531, 532, Fig.16 (a)~(c) and Fig.17 Each of the aspects (a) to (d) of the webs 534 and 535 is merely an example for achieving the purpose of the present invention and is not particularly limited.

[0106] [Summarize]

[0107] The frame 40 and the injection molding machine 1 of the injection molding machine 1 in the present embodiment may be configured as follows, and various embodiments may be adopted.

[0108] That is, the frame 40 of the injection molding machine 1 in the present embodiment provides a frame 40 of the injection molding machine 1, which supports the mold clamping device 10 that opens and closes the mold 11 in the horizontal direction by moving the movable platen 13 in the horizontal direction relative to the fixed platen 12, and the injection device 20 that injects the molten material, and the frame 40 of the injection molding machine 1 includes a beam 50 in the longitudinal direction of the fixed platen 12, and the beam 50 has a plate-like first member (for example, an upper flange 51) and a groove-shaped second member (for example, a groove-shaped second member) having an opening portion facing upward. For example, a component consisting of a lower flange 52 and a web 53), the second component is a component to which the first component (for example, the upper flange 51) is joined on the upper side in a manner that closes the opening portion, and the frame 40 of the injection molding machine 1 has a reinforcement structure, which reinforces a specified area surrounded by the first component (for example, the upper flange 51) and the second component (for example, a component consisting of a lower flange 52 and a web 53) below the fixed pressure plate 12 in order to suppress the deformation of the cross section of the beam 50 caused by the opening and closing of the mold 11.

[0109] This can improve the rigidity and strength of the frame 40 with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 .

[0110] First, the reinforcement structure may be a structure for reinforcing a predetermined area by adding a reinforcement member in the predetermined area.

[0111] Thus, the rigidity and strength of the frame 40 can be improved with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 without changing the existing components constituting the frame 40 .

[0112] In this case, the reinforcing member may be a rod-shaped member (for example, the bundle-shaped member 54 ) provided in the vertical direction just below the portion of the first member (for example, the upper flange 51 ) to which the load is applied.

[0113] Thus, the force that deforms the cross section of the beam 50 of the frame 40 caused by the opening and closing of the mold 11 in the injection molding machine 1 is transmitted to the lower flange 52 , thereby improving the rigidity and strength of the frame 40 .

[0114] Furthermore, the reinforcing member may be a diagonal brace 55 provided between the first member (for example, the upper flange 51 ) and a member in the vertical direction included in the second member (for example, the web 53 ).

[0115] Thus, the force that deforms the cross section of the beam 50 of the frame 40 caused by the opening and closing of the mold 11 in the injection molding machine 1 is transmitted to the web 53 , thereby improving the rigidity and strength of the frame 40 .

[0116] Furthermore, the reinforcing member may be a plate-shaped member (for example, the partition walls 56 and 57 ) provided parallel to the cross section of the beam 50 .

[0117] Thus, the force that deforms the cross section of the beam 50 of the frame 40 caused by opening and closing the mold 11 in the injection molding machine 1 is transmitted to the web 53 and the lower flange 52 as an in-plane load, thereby improving the rigidity and strength of the frame 40 .

[0118] Furthermore, the plate-like member (for example, the partition walls 57a and 57c) may be provided directly below the mounting member (for example, the mounting bolts 80a and 80c) for mounting the fixed platen 12 to the first member (for example, the upper flange 51).

[0119] This makes it possible to further increase the rigidity and strength of the frame 40 with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 .

[0120] Moreover, the reinforcing members may be a plurality of plate-like members (e.g., partitions 58a, 58c, 61a, 61c) arranged parallel to the cross section of the beam 50 and a connecting member (e.g., connecting plates 59, 62) connecting the plurality of plate-like members (e.g., partitions 58a, 58c, 61a, 61c).

[0121] Thus, even when the plate-like components (e.g., partitions 58a, 58c, 61a, 61c) are not disposed directly below the mounting components (e.g., mounting bolts 80a, 80c), the rigidity and strength of the frame 40 can be further improved relative to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1.

[0122] Here, notches 571, 572, 574, 581, 611 can be provided on the plate-like member to avoid interference with a joining member for joining a first member (e.g., an upper flange 51) and a second member (e.g., a member formed by a lower flange 52 and a web 53) or a passing member passing through the beam 50 in the length direction.

[0123] As a result, the rigidity and strength of the frame 40 can be improved relative to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1, without interfering with the connecting parts for connecting the first part (for example, the upper flange 51) and the second part (for example, the part composed of the lower flange 52 and the web 53) or the passing parts passing through the beam 50 in the length direction.

[0124] Secondly, the reinforcement structure may be a structure in which the predetermined region is reinforced by making the thickness of the vertically oriented member (for example, the web 53) included in the second member thicker in the predetermined region than outside the predetermined region.

[0125] Thus, the rigidity and strength of the frame 40 can be improved with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 , without adding new components constituting the frame 40 .

[0126] At this time, the second component can be a component formed by joining a third component (for example, webs 531, 534) and a fourth component (for example, webs 532, 535), wherein the third component is located within the specified area and includes a component in the vertical direction of the first thickness, and the fourth component is located outside the specified area and includes a component in the vertical direction of the second thickness that is thinner than the first thickness.

[0127] This makes it possible to easily manufacture a member for increasing the rigidity and strength of the frame 40 against a force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 .

[0128] Furthermore, the joint surface 536 between the third member (for example, the web 534) and the fourth member (for example, the web 535) may be provided to be inclined with respect to the longitudinal direction.

[0129] This saves steel material for manufacturing components for increasing the rigidity and strength of the frame 40 against the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 .

[0130] In addition, the injection molding machine 1 in the present embodiment further provides an injection molding machine 1, which includes a mold clamping device 10 for opening and closing the mold 11 in the horizontal direction by moving the movable platen 13 in the horizontal direction relative to the fixed platen 12, an injection device 20 for injecting molten material, and a frame 40 for supporting the mold clamping device 10 and the injection device 20, the frame 40 includes a beam 50 in the longitudinal direction of the fixed platen 12, the beam 50 has a plate-shaped first member (for example, an upper flange 51) and a groove-shaped member having an opening facing upward. The second component (for example, a component composed of a lower flange 52 and a web 53) is a component to which the first component (for example, an upper flange 51) is joined on the upper side in a manner that closes the opening portion, and the frame 40 has a reinforcement structure that reinforces a specified area surrounded by the first component (for example, the upper flange 51) and the second component (for example, a component composed of a lower flange 52 and a web 53) below the fixed pressure plate 12 in order to suppress deformation of the cross section of the beam 50 caused by the opening and closing of the mold 11.

[0131] This can improve the rigidity and strength of the frame 40 with respect to the force that deforms the cross section of the beam 50 of the frame 40 due to the opening and closing of the mold 11 in the injection molding machine 1 .

Claims

1. A frame of an injection molding machine, which supports a mold clamping device for opening and closing a mold in a horizontal direction by moving a movable platen in a horizontal direction relative to a fixed platen, and an injection device for injecting a molten material, wherein: The frame of the injection molding machine includes a beam component in the length direction of the fixed platen, The beam member includes a plate-shaped first member and a groove-shaped second member having an opening facing upward, wherein the second member is a member to which the first member is joined on the upper side so as to close the opening. The frame of the injection molding machine has a reinforcement structure that reinforces a predetermined area surrounded by the first member and the second member below the fixed platen in order to suppress deformation of a cross section of the beam member caused by opening and closing of the mold.

2. The frame of the injection molding machine according to claim 1, wherein: The reinforcement structure is a structure for reinforcing the predetermined area by adding a reinforcement member to the predetermined area.

3. The frame of the injection molding machine according to claim 2, wherein: The reinforcing member is a rod-shaped member provided in the vertical direction just below the portion of the first member to which the load is applied.

4. The frame of the injection molding machine according to claim 2, wherein: The reinforcing member is a diagonal brace provided between a member in a vertical direction included in the first member and the second member.

5. The frame of the injection molding machine according to claim 2, wherein: The reinforcing member is a plate-shaped member provided parallel to a cross section of the beam member.

6. The frame of the injection molding machine according to claim 5, wherein: The plate-shaped member is provided directly below a mounting member for mounting the fixed platen on the first member.

7. The frame of the injection molding machine according to claim 2, wherein: The reinforcing member is a plurality of plate-shaped members provided parallel to the cross section of the beam member and a connecting member connecting the plurality of plate-shaped members.

8. The frame of an injection molding machine according to any one of claims 5 to 7, wherein: The plate-like member is provided with a notch for avoiding interference with a joining member for joining the first member and the second member or a passing member passing through the beam member in the longitudinal direction.

9. The frame of the injection molding machine according to claim 1, wherein: The reinforcing structure is a structure for reinforcing the predetermined area by making the thickness of the vertically oriented member included in the second member thicker in the predetermined area than outside the predetermined area.

10. The frame of the injection molding machine according to claim 9, wherein: The second component is a component formed by joining a third component and a fourth component, wherein the third component is located within the prescribed area and includes a component of a first thickness in the vertical direction, and the fourth component is located outside the prescribed area and includes a component of a second thickness in the vertical direction that is thinner than the first thickness.

11. The frame of the injection molding machine according to claim 10, wherein: The joining surface between the third member and the fourth member is provided to be inclined with respect to the longitudinal direction.

12. An injection molding machine, comprising a mold clamping device for opening and closing a mold in a horizontal direction by moving a movable platen in a horizontal direction relative to a fixed platen, an injection device for injecting a molten material, and a frame supporting the mold clamping device and the injection device, wherein: The frame includes a beam component in the length direction of the fixed platen, The beam member includes a plate-shaped first member and a groove-shaped second member having an opening facing upward, wherein the first member is joined to the second member on the upper side so as to close the opening. The frame has a reinforcement structure that reinforces a predetermined area surrounded by the first member and the second member below the fixed platen in order to suppress deformation of a cross section of the beam member caused by opening and closing of the mold.

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