Vertical injection molding machine

Abstract

To reduce time required per cycle.SOLUTION: A vertical injection molding machine 1 can accommodate a plurality of molds A, B, each having a lower mold M1 and an upper mold M2. The vertical injection molding machine 1 includes: a table 21 on which a plurality of lower molds M1 can be accommodated; an injection device 5 located above the table 21 for injecting an injection material; and an opening / closing device 34 for the molds A, B. The table 21 can move so that the plurality of molds A, B pass sequentially through an injection / cooling zone Z1 and a cooling / removal zone Z2. In the injection / cooling zone Z1, the injection device 5 injects the injection material and cools it, and in the cooling / removal zone Z2, the injection material is cooled and a molded product is removed. The opening / closing device 34 opens and closes the molds A, B transferred to the cooling / removal zone Z2.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a vertical injection molding machine. [Background technology]

[0002] Rotary vertical injection molding machines, in which an injection unit and a mold clamping unit are arranged vertically and multiple molds can be mounted, are used for mass production of small molded products, etc. Patent Document 1 discloses a vertical injection molding machine in which an injection zone, two cooling zones, and a product removal zone are arranged at approximately 90 degree intervals above a rotary table. The mold is transferred in the order of the injection zone, the two cooling zones, and the product removal zone, and the molded product cooled in the cooling zone is removed in the product removal zone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-62850 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the vertical injection molding machine disclosed in Patent Document 1, the molded product is transferred to the product removal zone after being cooled. This means that time is wasted during transfer, making it difficult to reduce the time required per cycle.

[0005] An object of the present invention is to provide a vertical injection molding machine capable of shortening the time required per cycle. [Means for solving the problem]

[0006] The vertical injection molding machine of the present invention has a table on which a plurality of lower molds can be mounted, and a mold opening / closing device. The table is movable so that the plurality of molds pass sequentially through the injection cooling zone and the cooling and removal zone. In the injection and cooling zone, the injection material is injected from the injection device and cooled, and in the cooling and removal zone, the injected material is cooled and a molded product is removed. The opening / closing device opens and closes the molds transferred to the cooling and removal zone. Effect of the Invention

[0007] According to the present invention, it is possible to provide a vertical injection molding machine that can shorten the time required per cycle. [Brief description of the drawings]

[0008] [Figure 1A] FIG. 1 is a plan view of a table of an injection molding machine according to a first embodiment. [Figure 1B] FIG. 1B is a cross-sectional view taken along line 1B-1B of FIG. 1A. [Figure 1C] FIG. 1C is a cross-sectional view taken along line 1C-1C in FIG. 1A. [Figure 2A] FIG. 2 is a diagram showing a basic operation sequence of the injection molding machine in the first embodiment. [Figure 2B] FIG. 2B is a detailed view of part C in FIG. 2A. [Figure 3A] 4A to 4C are diagrams illustrating a mold clamping process in the first embodiment. [Figure 3B] 4 is a diagram showing an injection and pressure holding process in the first embodiment. FIG. [Figure 3C] 4A to 4C are diagrams illustrating a mold loosening step and a mold cooling step in the first embodiment. [Figure 3D] 5A to 5C are diagrams illustrating a die cooling process in the first embodiment. [Figure 3E] 5A to 5C are diagrams illustrating a clamping step and a die cooling step in the first embodiment. [Figure 3F] 4A to 4C are diagrams illustrating a mold opening step and an ejection step in the first embodiment. [Figure 3G]5A to 5C are diagrams illustrating a mold closing step in the first embodiment. [Figure 3H] 5A to 5C are diagrams illustrating a clamp release step in the first embodiment. [Figure 4] FIG. 2B is a view similar to FIG. 2A, illustrating a method of operating an injection molding machine of a comparative example. [Figure 5A] FIG. 11 is a plan view of a table of an injection molding machine according to a second embodiment. [Figure 5B] FIG. 5B is a cross-sectional view taken along line 5B-5B in FIG. 5A. [Figure 5C] FIG. 5C is a cross-sectional view taken along line 5C-5C in FIG. 5A. [Figure 6] FIG. 11 is a diagram showing detailed steps during one operation cycle in the second embodiment. [Figure 7A] 11A to 11C are diagrams illustrating a mold clamping process in the second embodiment. [Figure 7B] FIG. 11 is a diagram showing a mold loosening step in the second embodiment. [Figure 8] FIG. 4 is a partial cross-sectional view of an injection molding machine according to a first modified example. [Figure 9] FIG. 11 is a plan view of a table of an injection molding machine according to a second modified example. [Figure 10] FIG. 13 is a plan view of a table of an injection molding machine according to a third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (First embodiment) With reference to the drawings, several embodiments of the vertical injection molding machine (hereinafter referred to as injection molding machine 1) of the present invention will be described. FIG. 1A is a plan view of a table 21 of the injection molding machine 1 according to the first embodiment, FIG. 1B is a cross-sectional view taken along line 1B-1B in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line 1C-1C in FIG. 1A. The injection molding machine 1 has a mold clamping device 2 and an injection device 5 located above the mold clamping device 2 and for injecting an injection material. As shown in FIG. 1B, the injection molding machine 1 can be fitted with a plurality of molds M, each of which has a lower mold M1 and an upper mold M2. The injection molding machine 1 of this embodiment can be fitted with two molds M at the same time. In the following description, the two molds M are referred to as mold A and mold B.

[0010] (Configuration of the mold clamping unit 2) The mold clamping device 2 has a disk-shaped table 21 on which two lower dies M1 can be attached. The mold clamping device 2 has a base 22 that rotatably supports the table 21, and a support base 23 that supports the base 22. The support base 23 rotatably supports the table 21 via the base 22, and the table 21 can rotate around a rotation center RC of the table 21. A lower die M1 of mold A and a lower die M1 of mold B can be attached to the upper surface of the table 21 at an interval of 180 degrees with respect to the rotation center RC of the table 21.

[0011] As shown in FIG. 1A, an injection / cooling zone Z1 and a cooling / removal zone Z2 are provided above the table 21. The injection / cooling zone Z1 and the cooling / removal zone Z2 are stationary zones, and the table 21 moves relative to the injection / cooling zone Z1 and the cooling / removal zone Z2. The injection / cooling zone Z1 and the cooling / removal zone Z2 are disposed at intervals of approximately 180 degrees. The table 21 is rotatable so that the two molds A and B pass through the injection / cooling zone Z1 and the cooling / removal zone Z2 in sequence. That is, the table 21 is rotated intermittently by 180 degrees so that the molds A and B are alternately transferred to the injection / cooling zone Z1 and the cooling / removal zone Z2. The area between the injection / cooling zone Z1 and the cooling / removal zone Z2 is a moving zone for the molds A and B, and the molds A and B do not usually stop in the moving zone.

[0012] The injection cooling zone Z1 is located below the injection unit 5. In the injection cooling zone Z1, an injection material such as resin is injected into the molds A and B, and the injected injection material is cooled. A pressure plate 24 capable of pressing the upper mold M2 is provided above the injection cooling zone Z1. A toggle mechanism 25 and a drive motor 26 for the toggle mechanism 25 are provided inside the support base 23. The toggle mechanism 25 is connected to the pressure plate 24 via a tie bar 27. The pressure plate 24 can move up and down by the operation of the toggle mechanism 25. The toggle mechanism 25, the drive motor 26, the tie bar 27, and the pressure plate 24 constitute a clamping mechanism 28 for the molds A and B.

[0013] In the cooling and removal zone Z2, the injected injection material is cooled, and the molded product is removed. As shown in Fig. 1B, an ejector device 29 (ejection device) is provided inside the support table 23, and holes 31 and 32 through which an ejector pin 30 of the ejector device 29 passes are provided in the rotary table 21 and the base 22. When the molds A and B are transferred to the cooling and removal zone Z2, the hole 31 in the rotary table 21 communicates with the hole 32 in the base 22, and the ejector pin 30 ejects the molded product from the lower mold M1. The ejected molded product is removed by a robot 33 (see Fig. 1A) provided near the cooling and removal zone Z2.

[0014] An opening / closing device 34 for the molds A and B is provided in the cooling and unloading zone Z2. As shown in Fig. 1B, the opening / closing device 34 is provided on the support stand 23, and is capable of opening and closing the molds A and B transferred to the cooling and unloading zone Z2. The opening / closing device 34 has a clamping mechanism 35 that detachably holds the upper mold M2, a holding part 36 that holds the clamping mechanism 35, and a pair of hydraulic cylinders 37 connected to the holding part 36.

[0015] The clamping mechanism 35 includes an electromagnet (not shown) and can attract and hold the upper die M2 by the electromagnetic force generated by the electromagnet. The attracting and holding force of the upper die M2 can be released by stopping the energization of the electromagnet. As will be described later, the clamping mechanism 35 holds (clamps) the upper die M2 before the dies A and B are opened, and releases the holding (clamping) of the upper die M2 after the dies A and B are closed and before the dies A and B are transferred toward the injection cooling zone Z1. The clamping mechanism 35 is not limited to an electromagnetic type and may be, for example, a pneumatic type.

[0016] As shown in FIG. 1A, the holding portion 36 is an elongated plate material, and extends between both sides of the table 21 through the cooling and unloading zone Z2. As shown in FIG. 1C, both ends of the holding portion 36 are connected to hydraulic cylinders 37. The hydraulic cylinders 37 are supported by the support bases 23 on the outside of the table 21. A piston 39 having an enlarged diameter portion 38 having a diameter substantially equal to the cylinder diameter at one end is slidably disposed in the hydraulic cylinder 37. Two pipes 41 and 42 are connected to a hydraulic unit 40, one pipe 41 is connected to an upper connection port 43 of the hydraulic cylinder 37, and the other pipe 42 is connected to a lower connection port 44. Although the hydraulic unit 40 and the pipes 41 and 42 are connected to only one hydraulic cylinder 37 in FIG. 1C, they are also connected to the other hydraulic cylinder 37 in the same manner.

[0017] Supplying hydraulic oil to the hydraulic cylinder 37 from the lower connection port 44 causes the piston 39 to rise, lifting the holding part 36. Supplying hydraulic oil to the hydraulic cylinder 37 from the upper connection port 43 causes the piston 39 to descend, pulling down the holding part 36. When electricity is applied to the clamping mechanism 35, the holding part 36 and the clamping mechanism 35 supported by the holding part 36 are raised and lowered by the hydraulic cylinder 37, thereby raising and lowering the upper die M2. In this way, the die A and B can be opened and closed. The opening and closing device 34 for the die A and B is not limited to a hydraulic type, and the holding part 36 may be raised and lowered by a motor, for example.

[0018] (Operation method of injection molding machine 1) The operation method of the injection molding machine 1 will be described with reference to Figs. 2A to 3H. Fig. 2A shows the basic operation sequence of the injection molding machine 1, and Fig. 2B shows more detailed steps in one operation cycle (detailed view of part C in Fig. 2A). Figs. 3A to 3H illustrate the main steps shown in Fig. 2B. Fig. 2A shows the steps in the injection cooling zone Z1 and the cooling removal zone Z2 for mold A and mold B individually. Since the steps in one operation cycle of mold A and mold B are the same, Fig. 2B and Figs. 3A to 3H show the steps of mold A. Figs. 3A to 3C are cross-sectional views taken along line 1B-1B in Fig. 1A, and Figs. 3D to 3H are cross-sectional views taken along line 1C-1C in Fig. 1A.

[0019] 2A, the injection and cooling process S2 of mold A is carried out in the injection and cooling zone Z1, and in parallel with this, the cooling and removal process S3 of mold B is carried out in the cooling and removal zone Z2. After that, the table 21 rotates, and the cooling and removal process S3 of mold A is carried out in the cooling and removal zone Z2, and in parallel with this, the injection and cooling process S2 of mold B is carried out in the injection and cooling zone Z1. The measuring process S1 is a process in which the injection material required for one injection is measured by the injection cylinder (not shown) of the injection unit 5, and is carried out prior to the injection and cooling process S2. The measuring process S1, the injection and cooling process S2, and the cooling and removal process S3 constitute one operation cycle.

[0020] The injection and cooling step S2 and the cooling and removal step S3 will be described in more detail with reference to FIG. 2B. In the injection and cooling step S2, the mold clamping step S21 is performed first. As will be understood from the description below, when the mold clamping step S21 starts, the upper mold M2 is placed on the lower mold M1, but the upper mold M2 and the lower mold M1 are not tightly clamped together. As shown in FIG. 3A, in the mold clamping step S21, the pressure plate 24 of the mold clamping device 2 presses the upper mold M2 tightly against the lower mold M1 and maintains this state. This prepares the mold to inject the injection material.

[0021] Next, the injection and pressure-holding process S22 is performed. As shown in Fig. 3B, the measured injection material is filled into the mold A from the injection nozzle 51, and then pressure is held for a certain period of time. During the injection and pressure-holding process S22, the upper mold M2 is strongly pressed against the lower mold M1 by the pressure plate 24 of the mold clamping device 2.

[0022] Next, the mold loosening step S23 is performed. In the mold clamping step S21, the upper mold M2 and the lower mold M1 are tightly clamped, but in the mold loosening step S23, the tightly clamped upper mold M2 and lower mold M1 are loosened as shown in FIG. 3C. Specifically, the pressure plate 24 of the mold clamping device 2 is lifted and separated from the upper mold M2. When the injection and pressure holding step S22 is completed, the mold A cooling step S24 is started, and the mold loosening step S23 and the mold A cooling step S24 are carried out in parallel. At this stage, the injected material is in a molten or semi-molten state, so the mold A cannot be opened. However, the upper mold M2 is placed on the lower mold M1, and the adhesion between the upper mold M2 and the lower mold M1 is maintained, so there is no problem with cooling the mold A.

[0023] Next, the table 21 is rotated 180 degrees (step ST1). Because the pressure plate 24 is separated from the upper mold M2, the rotation of the mold A is not impeded by the clamping mechanism 28. The upper mold M2 remains placed on the lower mold M1. As shown in Fig. 3D, the mold A that was in the injection cooling zone Z1 is transferred to the cooling removal zone Z2, and the cooling removal step S3 is started.

[0024] Referring again to FIG. 2B, in the cooling and removal step S3, the cooling step S31 is performed following the cooling step S24 in the injection and cooling step S2. The mold A transferred to the cooling and removal zone Z2 is cooled until the injection material is cooled and solidified to a state where it can be removed. In parallel with this, the clamping step S32 of the upper mold M2 is performed. As shown in FIG. 3E, hydraulic oil is supplied from the hydraulic unit 40 to the upper connection port 43 of the hydraulic cylinder 37, the pressure plate 24 is lowered, and the clamping mechanism 35 is brought into close contact with the upper mold M2. Electricity is applied to the clamping mechanism 35 to clamp the upper mold M2 to the clamping mechanism 35 by electromagnetic force. It is preferable to perform the clamping step S32 before the cooling step S31 is completed.

[0025] After the cooling step S31 is completed, the mold opening step S33 is performed. As shown in FIG. 3F, hydraulic oil is supplied from the hydraulic unit 40 to the lower connection port 44 of the hydraulic cylinder 37 to lift the pressure plate 24. Since the upper mold M2 is clamped by the clamp mechanism 35, it rises together with the pressure plate 24 and separates from the lower mold M1, and the mold A is opened. After that, although not shown, the ejection step S34 is performed. The ejector pin 30 is raised by the ejector device 29, which pushes up the molded product that is in close contact with the lower mold M1 and separates it from the lower mold M1. After that, although not shown, the molded product is removed from the lower mold M1 by the robot 33.

[0026] Next, the mold closing step S35 is performed. The mold closing step S35 and the following clamp release step S36 are performed for the next cycle. As shown in Fig. 3G, hydraulic oil is supplied from the hydraulic unit 40 to the upper connection port 43 of the hydraulic cylinder 37 to lower the pressure plate 24. As a result, the upper mold M2 held by the clamp mechanism 35 is also lowered and placed on the lower mold M1.

[0027] Next, the clamp release step S36 is performed. As shown in Fig. 3H, first, the power supply to the clamp mechanism 35 is stopped, and the holding (clamping force) of the upper die M2 is released. Then, hydraulic oil is supplied from the hydraulic unit 40 to the lower connection port 44 of the hydraulic cylinder 37 to lift the pressure plate 24. Since the upper die M2 is not attracted to the clamp mechanism 35, it remains placed on the lower die M1. As a result, the lower die M1 and the upper die M2 placed on the lower die M1 are released from the opening and closing device 34 of the die A.

[0028] The above steps complete one operation cycle. After that, the table 21 is rotated 180 degrees (step ST2), and the mold A that was in the cooling and removal zone Z2 is transferred to the injection and cooling zone Z1, after which the next operation cycle begins. The operation cycle of mold B is performed in a similar manner. As shown in Figure 2A, the operation cycle of mold B is performed half a cycle behind (or ahead of) the operation cycle of mold A.

[0029] (Effects of this embodiment) Fig. 4 is a view similar to Fig. 2A showing an operating method of the injection molding machine 1 of the comparative example. In the comparative example, the opening and closing device 34 for the molds A and B is not provided, and the mold opening step S33 can only be performed in the injection cooling zone Z1. Since the mold opening step S33 can only be performed after the cooling of the molds A and B is completed, the cooling steps S24 and S31 and the subsequent mold opening step S33 are performed in the injection cooling zone Z1. In the comparative example, an ejection zone is provided instead of the cooling and ejection zone Z2 of this embodiment.

[0030] Since the total time required for cooling is the same as in this embodiment, the injection cooling step S102 in the injection cooling zone Z1 is longer than the injection cooling step S2 in this embodiment. On the other hand, since only the eject step S34 and removal of the molded product by the robot 33 are performed in the removal zone, the removal step S103 performed in the removal zone is shorter than the cooling removal step S3 in this embodiment. However, since the injection cooling step S102 of the mold A takes a long time, the table 21 cannot be rotated even if the removal step S103 of the mold B is completed early. This is because the table 21 can only be rotated after both the injection cooling step S102 of the mold A and the removal step S103 of the mold B are completed. In other words, while unnecessary waiting time occurs until the table 21 rotates in the removal zone, the time required in the injection cooling zone Z1 is longer, so the time required for one operation cycle is longer.

[0031] In this embodiment, a part of the cooling process of mold A in the comparative example is performed in the cooling and removal zone Z2, thereby balancing the time required in the injection cooling zone Z1 and the cooling and removal zone Z2. In other words, by replacing a part of the cooling process (cooling process S31) with the cooling and removal zone Z2, it is possible to simultaneously cool and remove mold B in the cooling and removal zone Z2 while cooling mold A in the injection cooling zone Z1. This reduces the time required for one operation cycle.

[0032] Second Embodiment An injection molding machine 1 according to a second embodiment will be described with reference to Figures 5A to 7B. Differences from the first embodiment will be mainly described here. Configurations and effects that are not described are similar to those of the first embodiment. Figure 5A is a plan view of a table 21 of an injection molding machine 1 according to a second embodiment, Figure 5B is a cross-sectional view taken along line 5B-5B in Figure 5A, and Figure 5C is a cross-sectional view taken along line 5C-5C in Figure 5A. As shown in Figures 5A and 5B, in this embodiment, an opening and closing device 34 is provided on the table 21.

[0033] 5B and 5C, the opening / closing device 34 has a holding part 36 that holds the upper die M2 and a hydraulic cylinder 37 connected to the holding part 36, and the hydraulic cylinder 37 opens and closes the die A by raising and lowering the holding part 36. The opening / closing device 34 of this embodiment has the same configuration as the opening / closing device 34 of the first embodiment, except that the opening / closing device 34 is provided on the table 21 and the clamp mechanism 35 is omitted. The clamping mechanism 28 of the die A is provided in the injection cooling zone Z1, as in the first embodiment. However, unlike the first embodiment, the clamping mechanism 28 clamps the die A by pressing the holding part 36.

[0034] The basic operation sequence of the injection molding machine 1 of this embodiment is the same as that of the first embodiment, as shown in FIG. 2A. FIG. 6 shows detailed steps in one operation cycle in this embodiment (detailed view of part C in FIG. 2A). FIGS. 7A-7B are cross-sectional views taken along line 1B-1B in FIG. 1A, illustrating some of the steps shown in FIG. 6. Since the clamp mechanism 35 is omitted, the clamp step S32 and the clamp release step S36 in the first embodiment are unnecessary. Therefore, the cooling and removal step S3 can be completed in a shorter time than in the first embodiment. The other steps in the cooling and removal step S3, i.e., the cooling step S31, the mold opening step S33, the ejection step S34, and the mold closing step S35, are performed in the same manner as in the first embodiment.

[0035] The injection cooling step S2 is also basically performed in the same manner as in the first embodiment. However, as shown in FIG. 7A, in the mold clamping step S21, the upper mold M2 is pressed via the holding portion 36 instead of directly pressing the upper mold M2 with the pressure plate 24. As shown in FIG. 7B, in the mold loosening step S23, the pressure plate 24 is also separated from the holding portion 36 instead of being separated from the upper mold M2. Since the mold clamping step S21 and the mold loosening step S23 can be performed in almost the same manner as in the first embodiment, the time required for the injection cooling step S2 is almost the same as in the first embodiment. Therefore, in this embodiment, it is possible to shorten one operation cycle compared to the first embodiment. Since the clamp mechanism 35 is not required, it is also advantageous in terms of reducing the cost of the injection molding machine 1.

[0036] (Modification) Although several embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Fig. 8 shows a cross-sectional view of the injection molding machine 1 of the first modified example. The opening and closing device 34 is provided on the support stand 23, as in the first embodiment. However, the opening and closing device 34 has a clamping mechanism 28 for the mold A. In other words, the injection cooling zone Z1 and the cooling and removal zone Z2 are provided with clamping mechanisms 28 of almost the same configuration. The process of this embodiment is almost the same as that of the first embodiment. Since the mold can be clamped during the clamping process S32, this embodiment is advantageous in the case of a molded product that requires a high level of sealing of the mold during cooling.

[0037] FIG. 9 shows a plan view of the table 21 of the injection molding machine 1 of the second modified example. The number of molds M may be three or more, and at least one (two in this modified example) cooling zone Z3, Z4 is provided between the injection cooling zone Z1 and the cooling and removal zone Z2. In this modified example, four molds M can be mounted at the same time. The table 21 is rotatable so that three or more (four in this modified example) molds M are transferred in the order of the injection cooling zone Z1, at least one cooling zone (two cooling zones Z3, Z4 in this modified example), and the cooling and removal zone Z2. This modified example is advantageous for manufacturing molded products that require a long cooling time because it is easy to ensure the cooling time.

[0038] 10 shows a plan view of table 121 of injection molding machine 1 of the third modified example. Table 121 is a rectangular plate rather than a circular plate, and moves back and forth linearly in the horizontal direction. The basic operation is the same as in the first embodiment, but since the length of table 121 in the direction perpendicular to the moving direction can be reduced, it is advantageous when it is desired to reduce the width of injection molding machine 1.

[0039] (Additional Note) This specification includes the following disclosure. [Configuration 1] A vertical injection molding machine capable of mounting a plurality of molds, each of which has a lower mold and an upper mold, a table on which a plurality of the lower dies can be mounted, an injection device located above the table and configured to inject an injection material, and an opening / closing device for the dies; The table is movable so that the plurality of molds pass through an injection cooling zone and a cooling removal zone in sequence; In the injection cooling zone, the injection material is injected from the injection device, and the injected injection material is cooled; In the cooling and ejection zone, the injected material is cooled and the molded product is ejected. The opening and closing device opens and closes the mold transferred to the cooling and removal zone, in a vertical injection molding machine. [Configuration 2] 2. The vertical injection molding machine according to claim 1, further comprising a support base that movably supports the table, and the opening and closing device is provided on the support base. [Configuration 3] 3. The vertical injection molding machine according to claim 2, wherein the opening and closing device has a clamp mechanism that detachably holds the upper mold. [Configuration 4] The vertical injection molding machine according to configuration 3, wherein the clamping mechanism holds the upper mold before the mold is opened, and releases the hold on the upper mold after the mold is closed and before the mold is transported toward the injection cooling zone. [Configuration 5] The vertical injection molding machine according to configuration 3 or 4, wherein the opening and closing device has a holding part that holds the clamp mechanism and a hydraulic cylinder connected to the holding part, and the hydraulic cylinder opens and closes the mold by raising and lowering the holding part. [Configuration 6] 5. The vertical injection molding machine according to claim 3 or 4, wherein the opening and closing device has a clamping mechanism for the mold. [Configuration 7] 2. The vertical injection molding machine according to claim 1, wherein the opening and closing device is provided on the table. [Configuration 8] The vertical injection molding machine according to configuration 7, wherein the opening and closing device has a holding part that holds the upper mold and a hydraulic cylinder connected to the holding part, and the hydraulic cylinder opens and closes the mold by raising and lowering the holding part. [Configuration 9] 9. The vertical injection molding machine according to configuration 8, further comprising a clamping mechanism for the mold provided in the injection cooling zone, the clamping mechanism clamping the mold by pressing the holding portion. [Configuration 10] 10. The vertical injection molding machine according to any one of configurations 1 to 9, wherein the plurality of molds are two molds, and the table is movable so that the two molds are alternately transferred to the injection cooling zone and the cooling removal zone. [Configuration 11] The plurality of molds are three or more molds, and at least one cooling zone is provided between the injection cooling zone and the cooling and removal zone; 10. The vertical injection molding machine according to any one of configurations 1 to 9, wherein the table is movable so that the three or more molds are transported in the order of the injection cooling zone, the at least one cooling zone, and the cooling removal zone. [Configuration 12] 12. The vertical injection molding machine according to any one of claims 1 to 11, wherein the table is rotatable around a rotation center of the table. [Explanation of symbols]

[0040] 1 Vertical injection molding machine 5 Injection device 21,121 Tables 23 Support stand 28 Fastening mechanism 34 Switchgear 35 Clamping mechanism 36 Holding part 37 Hydraulic Cylinder A, B, M molds M1 lower mold M2 upper mold Z1 Injection Cooling Zone Z2 Cooling removal zone Z3,Z4 Cooling Zone

Claims

1. A vertical injection molding machine capable of mounting a plurality of molds, each of which has a lower mold and an upper mold, a table on which a plurality of the lower dies can be mounted, an injection device located above the table and configured to inject an injection material, and an opening / closing device for the dies; The table is movable so that the plurality of molds pass through an injection cooling zone and a cooling removal zone in sequence; In the injection cooling zone, the injection material is injected from the injection device, and the injected injection material is cooled; In the cooling and ejection zone, the injected material is cooled and the molded product is ejected. The opening and closing device opens and closes the mold transferred to the cooling and removal zone, in a vertical injection molding machine.

2. 2. The vertical injection molding machine according to claim 1, further comprising a support base for movably supporting said table, said opening and closing device being provided on said support base.

3. 3. The vertical injection molding machine according to claim 2, wherein the opening and closing device has a clamp mechanism for detachably holding the upper mold.

4. 4. The vertical injection molding machine according to claim 3, wherein the clamping mechanism holds the upper mold before the mold is opened, and releases the hold of the upper mold after the mold is closed and before the mold is transported toward the injection cooling zone.

5. 4. The vertical injection molding machine according to claim 3, wherein the opening and closing device has a holding part that holds the clamp mechanism and a hydraulic cylinder connected to the holding part, and the hydraulic cylinder opens and closes the mold by raising and lowering the holding part.

6. 4. The vertical injection molding machine according to claim 3, wherein the opening and closing device has a clamping mechanism for the mold.

7. 2. The vertical injection molding machine according to claim 1, wherein the opening and closing device is provided on the table.

8. 8. The vertical injection molding machine according to claim 7, wherein the opening and closing device has a holding part that holds the upper mold and a hydraulic cylinder connected to the holding part, and the hydraulic cylinder opens and closes the mold by raising and lowering the holding part.

9. 9. The vertical injection molding machine according to claim 8, further comprising a clamping mechanism for the mold provided in the injection cooling zone, the clamping mechanism clamping the mold by pressing the holding portion.

10. 10. The vertical injection molding machine according to claim 1, wherein the plurality of molds is two molds, and the table is movable so that the two molds are alternately transferred to the injection cooling zone and the cooling removal zone.

11. The plurality of molds are three or more molds, and at least one cooling zone is provided between the injection cooling zone and the cooling and removal zone; 10. The vertical injection molding machine according to claim 1, wherein the table is movable so that the three or more molds are transferred in the order of the injection cooling zone, the at least one cooling zone, and the cooling removal zone.

12. 10. The vertical injection molding machine according to claim 1, wherein the table is rotatable about a rotation center of the table.

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