Mold and manufacturing method

Abstract

To cut a runner gate more accurately at the gate portion without providing a complex dedicated device and without extending the cycle time required for injection molding. [Solution] The mold is one or more molds including a fixed mold and a movable mold used for injection molding of resin, and the fixed mold and movable mold are provided with a molding section for molding a molded product of a desired shape and a cutting section for cutting a gate from the molded product molded in the molding section, and the cutting section is provided with a first positioning section for positioning a molded product molded in the molding section and having a runner gate when the fixed mold and movable mold are opened, and a blade for cutting the gate from the molded product positioned in the positioning section by displacement of the movable mold when the fixed mold and movable mold are closed.

Description

[Technical Field]

[0001] The present invention relates to a mold and a manufacturing method, and more particularly to a mold and a manufacturing method for injection molding with resin. [Background technology]

[0002] When a molded product of a desired shape is produced by injection molding, the molded product has a runner gate. A runner gate is a part formed by the mold's sprue, runner, or gate, and is an unnecessary part of the molded product. A runner gate attached to a molded product is cut off from the molded product at the gate.

[0003] It has been proposed that a vertical injection molding device, which has a rotatable turntable and a lifting body that can be raised and lowered relative to the turntable and which molds a molded product between a lower mold mounted on the turntable and an upper mold mounted on the lifting body, be equipped with a transfer mechanism that transfers the molded product in the lower mold, and a gate cutting mechanism that is positioned on the turntable at a distance from the lower mold and cuts the gate of the molded product transferred by the transfer mechanism to separate it into a resin product and a runner (see, for example, Patent Document 1).

[0004] An injection molding die has also been proposed in which the movable die is provided with a gate cut pin that cuts the product and the gate portion, an undercut pin that protrudes into the cavity and has a wide upper end, and an eject pin that pushes the product to remove it from the movable die (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-134769 [Patent Document 2] Japanese Patent Application Publication No. 2019-107849 Summary of the Invention [Problem to be solved by the invention]

[0006] However, cutting the gate requires complex dedicated equipment, and the operation time required for gate cutting increases the cycle time.

[0007] The present invention has been made in view of the above circumstances, and aims to make it possible to cut a runner gate more accurately at the gate portion without providing complex dedicated equipment or extending the cycle time required for injection molding. [Means for solving the problem]

[0008] A mold according to one aspect of the present invention is one or more molds including a fixed mold and a movable mold used for injection molding of resin, wherein the fixed mold and the movable mold are provided with a molding section for molding a molded product of a desired shape and a cutting section for cutting a gate from the molded product molded in the molding section, and the cutting section in either the fixed mold or the movable mold is provided with a first positioning section for positioning a molded product molded in the molding section and having a runner gate when the fixed mold and the movable mold are opened, and the cutting section in the other of the fixed mold or the movable mold is provided with a blade fixed to the other of the fixed mold or the movable mold, which blade cuts the gate from the molded product positioned in the positioning section due to displacement of the movable mold when the fixed mold and the movable mold are closed.

[0009] The cutting section can be provided with a first recess to prevent interference between the removal device that removes the molded product and holds the molded product positioned in position and the closed fixed mold and movable mold.

[0010] The cutting portion may be provided with a second recess for avoiding interference with the molded article when the molded article is positioned at the first position.

[0011] The cutting section may be provided with a third recess for avoiding interference with a runner gate attached to the molded product when the molded product is positioned at the first position.

[0012] A fourth recess can be provided in the cutting section to avoid interference with a runner gate attached to the molded product positioned at the first position when the fixed mold and the movable mold are closed.

[0013] The movable mold may be provided with an ejector pin for ejecting the runner gate cut from the molded product through the fourth recess.

[0014] The first positioning determines where the blade will cut the gate from the part.

[0015] The cutting section may be provided with a second positioning for positioning the molded product with a runner gate, and the second positioning determines the depth of the cut of the blade into the molded product with the runner gate.

[0016] One aspect of the manufacturing method of the present invention is a manufacturing method for manufacturing a molded product using one or more molds including a fixed mold and a movable mold, which are provided with a molding section for molding a molded product of a desired shape by injection molding of resin, and a positioning section provided on either the fixed mold or the movable mold and a cutting section consisting of a blade fixed to the other of the fixed mold or the movable mold, wherein when the fixed mold and the movable mold are opened, the molded product molded in the molding section and having a runner gate attached is positioned by the positioning section of the cutting section, and when the fixed mold and the movable mold are closed, the movable mold is displaced so that the gate is cut from the molded product positioned at the positioning section by the blade of the cutting section, and the molded product is injection molded in the molding section. [Effects of the Invention]

[0017] As described above, according to the present invention, it is possible to cut the runner gate at the gate portion with greater precision without providing complex dedicated equipment and without extending the cycle time required for injection molding. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a block diagram illustrating an outline of the configuration of an injection molding system 1 according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram illustrating the hardware configuration of a control device 16. [Figure 3] FIG. 2 is a diagram illustrating the configuration of a mold 11. [Figure 4] FIG. 2 is a cross-sectional view illustrating the internal configuration of a mold 11. [Figure 5] FIG. 2 is a perspective view showing the configuration of a movable mold 32. [Figure 6] FIG. 2 is a front view showing the configuration of a movable mold 32. [Figure 7] FIG. 2 is a cross-sectional view showing the configuration of a movable mold 32. [Figure 8] FIG. 2 is a perspective view showing the configuration of a fixed mold 31. [Figure 9] FIG. 2 is a rear view showing the configuration of the fixed mold 31. [Figure 10] FIG. 2 is a cross-sectional view showing the configuration of a fixed mold 31. [Figure 11] 1 is a flowchart illustrating the steps of a manufacturing method for manufacturing a molded product using a mold 11. [Figure 12] FIG. 10 is a diagram showing the mold 11 clamped in step S11. [Figure 13] FIG. 10 is a diagram showing the mold 11 opened in step S13. [Figure 14] FIG. 10 is a diagram showing the mold 11 with the robot 14 inserted therebetween in step S14. [Figure 15] FIG. 10 is a diagram showing the robot 14 pushing out the molded product 401 and the runner gate 403 and suctioning the molded product 401 in step S15. [Figure 16]FIG. 10 is a diagram showing the mold 11 in which the ejector pins 112, 113, and 114 have been returned in step S16. [Figure 17] FIG. 10 is a diagram showing the robot 14 moving the molded product 401 to the positioning unit 202 in step S17. [Figure 18] FIG. 10 is a diagram showing a molded product 401 that is moved by the robot 14 to a position a predetermined distance from the positioning unit 231 and the positioning plate 232 in step S18. [Figure 19] FIG. 10 is a diagram showing a molded product 401 that is abutted against and positioned by a positioning unit 231 in step S19. [Figure 20] FIG. 10 is a diagram showing a molded product 401 that is abutted against a positioning plate 232 and positioned in step S20. [Figure 21] FIG. 10 is a diagram showing the mold 11 being clamped in step S21. [Figure 22] FIG. 10 is a diagram showing the molded product 401 being moved a predetermined distance away from the positioning plate 232 in step S22. [Figure 23] FIG. 10 is a diagram illustrating the robot 14 removing the molded product 401 from the closed mold 11 in step S23. [Figure 24] FIG. 10 is a diagram showing the robot 14 removing the molded product 401 from the closed mold 11 in step S23. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following describes embodiments of the present invention. The correspondence between the constituent features of the present invention and the embodiments described in the Detailed Description of the Invention is exemplified as follows: This description is intended to confirm that the embodiments supporting the present invention are described in the Detailed Description of the Invention. Therefore, even if there is an embodiment described in the Detailed Description of the Invention that corresponds to a constituent feature of the present invention but is not described here, this does not mean that the embodiment does not correspond to that constituent feature. Conversely, even if an embodiment is described here as corresponding to a constituent feature, this does not mean that the embodiment does not correspond to constituent features other than the constituent feature.

[0020] A mold according to one aspect of the present invention is one or more molds (e.g., mold 11 in FIG. 1) including a fixed mold (e.g., fixed mold 31 in FIG. 1) and a movable mold (e.g., movable mold 32 in FIG. 1) used for resin injection molding, wherein the fixed mold and the movable mold are provided with a molding section (e.g., molding section 81 in FIG. 4) for molding a molded product of a desired shape and a cutting section (e.g., cutting section 82 in FIG. 4) for cutting a gate from a molded product molded in the molding section, and the cutting section in either the fixed mold or the movable mold is provided with a first positioning section (e.g., positioning unit 203 in FIG. 8) for positioning a molded product with a runner gate molded in the molding section when the fixed mold and the movable mold are opened, and the cutting section in the other of the fixed mold or the movable mold is provided with a blade (e.g., blade 111 in FIG. 5) fixed to the other of the fixed mold or the movable mold, which cuts a gate from a molded product positioned in the positioning section due to displacement of the movable mold when the fixed mold and the movable mold are closed.

[0021] An injection molding system and a mold according to an embodiment of the present invention will be described below with reference to FIGS.

[0022] First, the configuration of an injection molding system 1 according to an embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating an outline of the configuration of the injection molding system 1 according to an embodiment of the present invention. The injection molding system 1 injection-moldes a molded product using resin and cuts off the runner gate attached to the molded product at the gate. The injection molding system 1 cuts off the runner gate attached to the molded product at the gate and removes the molded product in the same cycle time as the time required for injection molding.

[0023] The injection molding system 1 includes a mold 11, an injection molding machine 12, an injection molding machine controller 13, a robot 14, a robot controller 15, a control device 16, and a tray 17. The mold 11 is a metal mold used to mold a resin molding material into a specific shape. The injection molding machine 12 is a plastic processing machine (resin processing machine) that performs a series of operations, including supplying the resin molding material, heating and plasticizing it, injecting it into the mold 11, cooling and solidifying it, opening the mold, ejecting the molded product, and closing the mold. The injection molding machine controller 13 controls the series of injection molding operations of the injection molding machine 12. The robot 14 is an example of a removal device and is a vertically articulated industrial robot. The robot 14 grasps, moves, and removes a molded product formed in the mold 11 from the mold 11. As will be described in detail later, the robot 14 also positions the molded product in a predetermined portion of the mold 11 when cutting the runner gate attached to the molded product at the gate portion. Although details will be described later, the robot 14 can also be said to be a transfer device that transfers the molded product inside the mold 11.

[0024] Instead of the vertical articulated robot 14, various types of pick-up devices can be used, such as a Cartesian coordinate robot, a SCARA robot, or an automatic machine controlled by NC (Numerical Control).

[0025] The robot controller 15 controls the operation of the robot 14. The control device 16 is connected to the injection molding machine controller 13 and the robot controller 15, and controls the operation of the injection molding machine 12 and the robot 14. The tray 17 stores the molded product removed from the mold 11.

[0026] The mold 11 includes a fixed mold 31 and a movable mold 32 .

[0027] The injection molding machine 12 is configured to include a mold clamping unit 20 and an injection unit 22. The fixed mold 31 is fixed to the injection unit 22 side. The movable mold 32 is fixed to the mold clamping unit 20 side.

[0028] The mold clamping unit 20 opens and closes the mold 11, generating a mold clamping force. The mold clamping unit 20 opens and closes the mold 11 by displacing the movable mold 32 in the vertical direction in FIG. 1. The injection unit 22 injects molten resin into the closed mold 11 in the upward direction in FIG. 1. The injection unit 22 includes an injection cylinder 28 and a nozzle 29. A screw is provided inside the injection cylinder 28, and as the screw rotates inside the injection cylinder 28, pellet-shaped resin is compressed and melted. The injection cylinder 28 injects the molten resin into the mold 11 from the nozzle 29.

[0029] Next, a description will be given of the hardware configuration of the control device 16. Figure 2 is a block diagram illustrating the hardware configuration of the control device 16.

[0030] In the control device 16, a CPU (Central Processing Unit) 51, a ROM (Read Only Memory) 52, and a RAM (Random Access Memory) 53 are interconnected by a bus .

[0031] An input / output interface 55 is also connected to the bus 54. Connected to the input / output interface 55 are an input unit 56 that acquires signals from a keyboard or a mouse, or from the injection molding machine controller 13 and the robot controller 15, which are connected as needed, an output unit 57 that transmits signals to a display or to the injection molding machine controller 13 and the robot controller 15, which are connected as needed, a storage unit 58 that includes a nonvolatile memory, a hard disk, or the like, a communication unit 59 that includes a network interface, or the like, and a drive 60 that drives removable media 61 such as a semiconductor memory, a magnetic disk, an optical disk, or a magneto-optical disk.

[0032] In the control device 16 (computer) configured as described above, the CPU 51 loads a program stored in the memory unit 58, for example, into the RAM 53 via the input / output interface 55 and the bus 54, and executes the program, thereby performing a series of processes described below.

[0033] The program executed by the control device 16 (CPU 51) is recorded or stored on removable media 61, which is a packaged medium consisting of, for example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.), a magneto-optical disk, or a semiconductor memory, or is provided via a wired or wireless transmission medium such as a local area network, the Internet, or a dedicated line.

[0034] The program can be installed in the computer by inserting the removable medium 61 into the drive 60 and storing it in the storage unit 58 via the input / output interface 55. The program can also be installed in the computer by receiving it via a wired or wireless transmission medium through the communication unit 59 and storing it in the storage unit 58. Alternatively, the program can be installed in the computer in advance by storing it in the ROM 52 or the storage unit 58 in advance.

[0035] That is, the control device 16 (computer) executes the installed programs to realize the functions described below.

[0036] It should be noted that the number of CPUs 51 is not limited to one, and it is also possible to provide a plurality of CPUs 51. In this case, the ROM 52 and the RAM 53 can be shared by the plurality of CPUs 51, or can be provided so as to correspond to each of the plurality of CPUs 51.

[0037] Furthermore, instead of the control device 16, the injection molding machine controller 13 or the robot controller 15 can be made to perform similar control by a program. For example, a virtual control device 16 can be provided in the injection molding machine controller 13 or the robot controller 15. For example, when the control device 16 is a virtual device, hardware resources are allocated to the control device 16, and the control device 16 has functions equivalent to those of the hardware.

[0038] Next, the configuration of the mold 11 will be described. Figures 3 and 4 are diagrams illustrating the configuration of the mold 11. Figure 3(A) is a top view showing the upper surface of the mold 11. Figure 3(B) is a side view showing the side of the mold 11. Figure 4 is a cross-sectional view illustrating the internal configuration of the mold 11. Note that Figure 4 is a cross-sectional view combining cross sections at positions where main components are arranged, and is not a cross-section on a single plane.

[0039] In the following description, the direction in which the movable mold 32 is displaced when the mold 11 is closed is referred to as the front side, and the front-rear direction is indicated by the Y axis, the left-right direction is indicated by the X axis, and the up-down direction is indicated by the Z axis. Hereinafter, the lower side in FIG. 3(A) in the Y axis direction will be simply referred to as the front side, and the upper side in FIG. 3(A) in the Y axis direction will be simply referred to as the rear side (rear side). Hereinafter, the left side in FIG. 3(A) in the X axis direction will be simply referred to as the left side, and the right side in FIG. 3(A) in the X axis direction will be simply referred to as the right side. Hereinafter, the front side in FIG. 3(A) in the Z axis direction will be simply referred to as the upper side, and the rear side in FIG. 3(A) in the Z axis direction will be simply referred to as the lower side. The rear side (rear side) is the positive direction of the Y axis, the right side is the positive direction of the X axis, and the upper side is the positive direction of the Z axis. The Z-axis direction is also referred to simply as the up-down direction, the X-axis direction is also referred to simply as the left-right direction, and the Y-axis direction is also referred to simply as the front-back direction. Furthermore, the direction along a plane parallel to the X-axis and Y-axis is also referred to simply as the horizontal direction. Furthermore, the horizontal direction and a direction that forms a relatively small angle with the horizontal direction are also referred to as the lateral direction, and the up-down direction and a direction that forms a relatively small angle with the up-down direction are also referred to as the vertical direction. The same applies to the following figures.

[0040] The mold 11 is configured to include a fixed mold 31 and a movable mold 32. The movable mold 32 is displaced in the front-rear direction by the mold clamping device 20, thereby opening and closing the mold 11. The fixed mold 31 is fixed to the injection device 22.

[0041] The mold 11 is provided with a molding section 81 and a cutting section 82. The molding section 81 and the cutting section 82 are provided in the fixed mold 31 and the movable mold 32, respectively. The molding section 81 consists of the molding section 201 of the fixed mold 31 and the molding section 101 of the movable mold 32. The molding section 81 is a portion for molding a molded product of a desired shape. When the mold 11 is closed, the molding section 201 of the fixed mold 31 and the molding section 101 of the movable mold 32 form a cavity 301, a gate 302, a runner 303, and a sprue 304 therein. The cavity 301, the gate 302, the runner 303, and the sprue 304 are cavities formed between the molding section 201 of the fixed mold 31 and the molding section 101 of the movable mold 32, respectively, when the mold 11 is closed. The cavity 301 is a cavity into which a molded product is molded, and corresponds to the shape of the molded product. The side of cavity 301 facing molding portion 201 of fixed mold 31 may be referred to as a core, and the side of cavity 301 facing molding portion 101 of movable mold 32 may be referred to as a cavity.

[0042] Gate 302 is an entrance for filling molten resin into cavity 301. Runner 303 is a flow path for molten resin that guides the molten resin into cavity 301. Sprue 304 is a flow path for molten resin that transports the molten resin injected from nozzle 29 into mold 11.

[0043] The cutting section 82 includes a positioning section 202 of the fixed mold 31, a cutter 102 of the movable mold 32 (details will be described later), and a recess 103 of the movable mold 32. The positioning section 202 positions a molded product with a runner gate attached that is injection molded in the cavity 301. The runner gate attached to the molded product is a portion formed by the gate 302, runner 303, and sprue 304, and is not required for the molded product. When the fixed mold 31 and the movable mold 32 are closed, a blade 111 provided on the cutter 102 cuts the runner gate from the molded product that is positioned in the positioning section 202 due to the displacement of the movable mold 32.

[0044] The recess 103 is formed in the movable mold 32 in the shape of a cavity or a hole. The recess 103 prevents interference between the robot 14, which removes the molded product and holds the molded product positioned in the positioning section 202, and the closed fixed mold 31 and movable mold 32. The recess 103 is formed so as to open on the top surface of the movable mold 32 when the fixed mold 31 and the movable mold 32 are closed. When the fixed mold 31 and the movable mold 32 are closed, the robot 14 can enter and exit the interior of the recess 103 from the top surface of the recess 103. The recess 103 may also open on the side or bottom surface of the movable mold 32.

[0045] Next, the fixed mold 31 and the movable mold 32 will be described in detail. First, the movable mold 32 will be described in detail. Fig. 5 is a perspective view showing the configuration of the movable mold 32 on the surface of the movable mold 32 that faces the fixed mold 31. Fig. 6 is a front view showing the configuration of the movable mold 32 on the front surface, which is the surface of the movable mold 32 that faces the fixed mold 31. Fig. 7 is a cross-sectional view showing the configuration of the movable mold 32 taken along line AA' shown in Fig. 6.

[0046] The movable mold 32 is provided with a molding section 101, a cutter 102, a recess 103, a recess 104, and guide pins 105-1 to 105-4. The recess 104 is included in the cutting section 82.

[0047] Among the surfaces of the movable mold 32, the surface facing the fixed mold 31 is provided with guide pins 105-1 to 105-4 near the four corners thereof for positioning with the fixed mold 31.

[0048] Forming section 101 is formed with positioning holes 121-1 to 121-4, a gate opening 122, and a flow path 123. Positioning holes 121-1 to 121-4 are holes for positioning fixed mold 31 relative to molding section 201. Gate opening 122 is a concave portion that forms gate 302 when mold 11 is closed. Flow path 123 is a concave flow path that forms runner 303 when mold 11 is closed. For example, gate opening 122 is narrower in width and depth than flow path 123.

[0049] Cutter 102 is provided adjacent to recess 103 and cuts the runner gate from the molded product. Cutter 102 is provided with a blade 111. Blade 111 is fixed to cutter 102, which in turn is fixed to movable mold 32. That is, blade 111 is fixed to movable mold 32. Blade 111 is made by processing the end of a thin metal plate with high hardness into an extremely thin piece. Blade 111 cuts the gate from the molded product that is positioned in positioning portion 202 by displacement of movable mold 32. When blade 111 cuts the gate, the runner gate is separated from the molded product. This removes unnecessary portions from the molded product. The teeth of the blade 111 are arranged in the vertical direction, i.e., along the Z-axis direction, and when the mold 11 is closed, the movable mold 32 moves toward the user, i.e., in the Y-axis direction, so that the blade 111 cuts the gate from the molded product by separating it in the left-right direction, i.e., in the X-axis direction.

[0050] Recess 104 is formed in the shape of a cavity or a hole adjacent to recess 103. When fixed mold 31 and movable mold 32 are closed, recess 104 prevents interference with a runner gate attached to a molded product positioned in positioning portion 202. In other words, when fixed mold 31 and movable mold 32 are closed, recess 104 stores the runner gate attached to the molded product inside, thereby preventing interference with the runner gate attached to the molded product positioned in positioning portion 202.

[0051] 7, the movable mold 32 is provided with ejector pins 112, 113, and 114. The ejector pin 112 pushes out the runner gate cut from the molded product from the recess 104. The ejector pins 113 and 114 push out the molded product with the runner gate attached, which has been injection molded in the cavity 301, from the molding section 101.

[0052] Next, the fixed mold 31 will be described in detail. Fig. 8 is a perspective view showing the configuration of the fixed mold 31 on the side of the fixed mold 31 that faces the movable mold 32. Fig. 9 is a rear view showing the configuration of the fixed mold 31 on the rear side, which is the side of the fixed mold 31 that faces the movable mold 32. Fig. 10 is a cross-sectional view showing the configuration of the fixed mold 31 taken along line AA' shown in Fig. 9.

[0053] The fixed mold 31 is provided with a molding portion 201, a positioning portion 202, and positioning holes 206-1 to 206-4.

[0054] The positioning portion 202 is formed as a generally rectangular recess that is recessed a predetermined distance forward from the surface facing the movable mold 32 .

[0055] Positioning holes 206-1 to 206-4 for positioning with the movable mold 32 are provided near the four corners of the surface of the fixed mold 31 that faces the movable mold 32. When the mold 11 is closed, the guide pins 105-1 to 105-4 of the movable mold 32 fit into the positioning holes 206-1 to 206-4 of the fixed mold 31, respectively, thereby positioning the fixed mold 31 and the movable mold 32.

[0056] Guide pins 221-1 to 221-4 are provided in the molding portion 201 of the fixed mold 31. When the mold 11 is closed, the guide pins 221-1 to 221-4 of the molding portion 201 of the fixed mold 31 respectively enter the positioning holes 121-1 to 121-4 of the molding portion 101 of the movable mold 32, thereby positioning the molding portion 201 and the molding portion 101.

[0057] The sprue hole 224 is a hole where the sprue 304 formed in the molding portion 201 opens into the molding portion 201 of the fixed mold 31. The sprue hole 224 communicates with the nozzle 29 through the portion of the sprue 304 in the fixed mold 31. When the mold 11 is closed to perform injection molding, the molten resin injected from the nozzle 29 passes through the sprue hole 224, the runner 303 and the gate 302, and flows into the cavity 301.

[0058] The positioning portion 202 is provided with a positioning unit 231, a positioning plate 232, a recess 233, and recesses 234-1 and 234-2.

[0059] The positioning unit 231 partially protrudes rearward (toward the back) from the surface of the positioning part 202 facing the movable mold 32. The positioning unit 231 has a protrusion that forms a surface (a surface defined by the Y-axis direction and the Z-axis direction) that intersects with the surface of the positioning part 202. The molded product is positioned by being abutted against the protrusion of the positioning unit 231. That is, the positioning unit 231 positions the molded product at a predetermined position in the X-axis direction by abutting the molded product against the surface formed by the protrusion that intersects with the surface of the positioning part 202.

[0060] When the fixed mold 31 and the movable mold 32 are opened, the molded product molded in the molding section 81 and having a runner gate is abutted against the positioning unit 231, thereby positioning the molded product. The positioning unit 231 determines the position of the molded product having a runner gate in the left-right direction, i.e., in the X-axis direction.

[0061] The blade 111 cuts the gate from the molded product by separating it in the left-right direction, i.e., the X-axis direction, and the positioning unit 231 positions the molded product at a predetermined position in the X-axis direction, so that the position at which the blade 111 cuts the gate from the molded product is determined by the positioning unit 231.

[0062] The positioning plate 232 is formed in a flat plate shape. The positioning plate 232 is arranged in a generally rectangular recess of the positioning part 202 at a position aligned with the positioning unit 231 in the X-axis direction, i.e., in the left-right direction. The positioning plate 232 forms a flat surface on the surface of the positioning part 202, i.e., the rear (rear) surface of the movable mold 32. The molded product is positioned by abutting against the surface of the positioning plate 232. That is, the positioning plate 232 positions the molded product at a predetermined position in the Y-axis direction by abutting the molded product against the surface of the positioning plate 232.

[0063] The blade 111 is fixed to the movable mold 32, which is displaceable in the Y-axis direction, and the positioning plate 232 determines the depth of the cut of the blade 111 into the molded product with a runner gate.

[0064] The recess 233 is formed in the shape of a hole near the positioning unit 231 and the positioning plate 232. When the molded product is positioned on the positioning unit 231 or the positioning plate 232, the recess 233 accommodates a part of the runner gate attached to the molded product, thereby avoiding interference with the runner gate.

[0065] The recesses 234-1 and 234-2 are formed in the positioning portion 202 as holes (grooves) extending from the vicinity of the positioning unit 231 and the positioning plate 232 to the upper surface of the fixed mold 31. The recesses 234-1 and 234-2 each accommodate a portion of the molded product when the molded product is positioned in the positioning unit 231 or the positioning plate 232, and prevent interference with the molded product. The recesses 234-1 and 234-2 also prevent interference with the molded product when the robot 14 removes the molded product from the mold 11.

[0066] Next, a method for manufacturing a molded product using the injection molding system 1 and the mold 11 will be described. FIG. 11 is a flowchart illustrating the steps of the manufacturing method for manufacturing a molded product using the mold 11. The steps of the manufacturing method will be described below with reference to FIGS. 12 to 24. FIGS. 12(A), 13(A), 14(A), 15(A), 16(A), 17(A), 18(A), 19(A), 20(A), 21(A), 22(A), and 23 are cross-sectional views showing horizontal cross sections of the mold 11 and the robot 14. FIGS. 12(B), 13(B), 14(B), 15(B), 16(B), 17(B), 18(B), 19(B), 20(B), 21(B), 22(B), and 24 are side views showing the sides of the mold 11 and the robot 14. Figures 18(C), 20(C), and 22(C) are enlarged cross-sectional views showing the cross section of positioning portion 202. Positioning by positioning portion 202 will be described below with reference to Figures 18(C), 20(C), and 22(C).

[0067] The steps included in the manufacturing method described below are also processing steps of the control device 16 that executes the program.

[0068] In step S11, as shown in Fig. 12, the mold 11 is closed and clamped. That is, the control device 16 commands the injection molding machine controller 13 to cause the mold clamping device 20 of the injection molding machine 12 to close and clamp the mold 11. In step S12, injection molding is performed. That is, the control device 16 commands the injection molding machine controller 13 to operate the injection cylinder 28 of the injection molding machine 12 to inject molten resin from the nozzle 29 into the mold 11, thereby molding using the mold 11. In this case, a predetermined molded product is formed by injection molding using the molding section 81 (cavity 301) of the mold 11.

[0069] In step S13, the molded product is cooled and solidified, and then the mold 11 is opened as shown in FIG. 13. That is, the control device 16 instructs the injection molding machine controller 13 to cause the mold clamping device 20 of the injection molding machine 12 to open the mold 11. In this case, the mold 11 opens as the movable mold 32 is displaced rearward (toward the back). The molded product 401 is a molded product formed in the cavity 301 by injection molding. The runner gate 402 is a runner and gate attached to the molded product 401 formed in the cavity 301 by injection molding. The runner gate 402 is molded in a shape corresponding to the gate 302, runner 303, and sprue 304. Note that the gate 404, which will be described later, is the portion of the runner gate 402 that is molded by the gate 302.

[0070] 14, the robot 14 is inserted between the molds 11, that is, between the fixed mold 31 and the movable mold 32. More specifically, the robot 14 inserts the end effector of the robot 14 between the fixed mold 31 and the movable mold 32. The end effector of the robot 14 is provided on the wrist axis of the robot 14, and sucks and holds the molded product 401 by using negative air pressure.

[0071] In this case, the control device 16 issues a command to the robot controller 15 to operate the robot 14, change its posture, and place the end effector of the robot 14 between the fixed mold 31 and the movable mold 32. For example, the robot 14 moves from the upper side to the lower side to place the end effector between the fixed mold 31 and the movable mold 32.

[0072] 15, in step S15, ejector pins 112, 113, and 114 eject molded article 401 with runner gate 402 and runner gate 403 cut in the previous cycle, and robot 14 picks up molded article 401. More specifically, ejector pin 112 protrudes forward to push out and discharge runner gate 403 cut in the previous cycle (runner gate 402 cut in the previous procedure of step S21) from recess 104. Runner gate 403 pushed out of recess 104 falls below mold 11. Ejector pins 113 and 114 protrude forward to push out and discharge molded article 401 with runner gate 402 injection molded in step S12 from molding section 101. The robot 14 sucks the molded product 401 extruded by the ejector pins 113 and 114 with an end effector that sucks and holds the molded product 401 by negative air pressure.

[0073] In this case, the control device 16 commands the injection molding machine controller 13 to cause the mold clamping device 20 to protrude the ejector pins 112, 113, and 114. The control device 16 also commands the robot controller 15 to operate the robot 14 and cause the robot 14 to pick up the molded product 401.

[0074] 16, the ejector pins 112, 113, and 114 are returned. The control device 16 instructs the injection molding machine controller 13 to cause the mold clamping device 20 to return the ejector pins 112, 113, and 114.

[0075] 17, the robot 14 moves the molded article 401 to the positioning unit 202. More specifically, the robot 14 rotates the end effector together with the adsorbed molded article 401 by 180 degrees around the Z axis, and moves the molded article 401 to the vicinity of the positioning unit 202. That is, the control device 16 commands the robot controller 15 to operate the robot 14, and causes the robot 14 to move the molded article 401 to the positioning unit 202.

[0076] In step S18, as shown in Fig. 18, the robot 14 moves the molded article 401 to a position that is a predetermined distance from the positioning unit 231 and the positioning plate 232. More specifically, as shown in Fig. 18(C), the robot 14 moves the adsorbed molded article 401 to a position that is a predetermined distance CX from the positioning unit 231 in the X-axis direction and a predetermined distance CY from the positioning plate 232 in the Y-axis direction. For example, the distances CX and CY are each set to 3 mm to 0.5 mm.

[0077] That is, the control device 16 commands the robot controller 15 to operate the robot 14, causing the robot 14 to move the molded product 401 to a position a predetermined distance from the positioning unit 231 and the positioning plate 232.

[0078] 19, the robot 14 abuts the molded article 401 against the positioning unit 231. More specifically, the robot 14 moves the molded article 401 to the right, i.e., in the positive direction of the X-axis, to abut the molded article 401 against the positioning unit 231. In other words, the robot 14 abuts the molded article 401 against the positioning unit 231 to position the molded article 401 in the X-axis direction.

[0079] In this case, the control device 16 commands the robot controller 15 to operate the robot 14 and cause the robot 14 to abut the molded product 401 against the positioning unit 231 .

[0080] 20, the robot 14 abuts the molded article 401 against the positioning plate 232. More specifically, the robot 14 abuts the molded article 401 against the positioning plate 232 by moving the molded article 401 forward, i.e., in the negative direction of the Y axis. In other words, the robot 14 abuts the molded article 401 against the positioning plate 232 to position the molded article 401 in the Y axis direction. In this case, the robot 14 sandwiches the molded article 401 between itself and the positioning plate 232 and holds it at the position determined by the positioning unit 231 and the positioning plate 232.

[0081] In this case, the control device 16 commands the robot controller 15 to operate the robot 14 and cause the robot 14 to abut the molded product 401 against the positioning plate 232 .

[0082] In this way, in step S20, the molded product 401 is positioned in the X-axis direction and the Y-axis direction.

[0083] 21, the mold 11 is closed and clamped. In this case, the mold 11 is closed and clamped while the robot 14 positions the molded article 401 by abutting it against the positioning unit 231 and the positioning plate 232. By closing the mold 11, the blade 111 of the cutter 102 cuts the gate 404 from the molded article 401.

[0084] The blade 111 is fixed to the movable mold 32 at a position where it cuts the gate 404 from the molded article 401 positioned in the positioning portion 202, and when the mold 11 is closed, the movable mold 32 is displaced toward the user, i.e., in the Y-axis direction, and also displaces in the Y-axis direction to cut the gate 404 from the molded article 401, which has been positioned by abutting against the positioning unit 231 and the positioning plate 232. That is, in this case, the blade 111 separates the molded article 401 and the runner gate 402 at the gate 404 that corresponds to the gate opening 122. In this way, the gate of the molded article 401 is cut.

[0085] As shown in Figure 21, the recess 103 is formed in the movable mold 32 in the shape of a cavity or a hole to avoid interference with the robot 14, so that even if the robot 14 positions the molded product 401 by butting it against the positioning unit 231 and the positioning plate 232, the movable mold 32 does not interfere with the robot 14.

[0086] That is, the control device 16 instructs the injection molding machine controller 13 to cause the mold clamping device 20 of the injection molding machine 12 to close and clamp the mold 11.

[0087] 22, the robot 14 moves the molded article 401 a predetermined distance away from the positioning plate 232. More specifically, the robot 14 moves the molded article 401 rearward, i.e., in the positive direction of the Y axis, thereby moving the molded article 401 a predetermined distance away from the positioning plate 232.

[0088] In this case, the robot 14 moves the molded article 401 in the positive direction of the Y axis until the molded article 401 is a predetermined distance away from the positioning plate 232 and does not come into contact with the cutter 102.

[0089] That is, the control device 16 commands the robot controller 15 to operate the robot 14 and cause the robot 14 to move the molded article 401 away from the positioning plate 232 by a predetermined distance.

[0090] 23 and 24, the robot 14 removes the molded article 401. More specifically, the robot 14 removes the molded article 401, from which the runner gate 402 has been cut, from the closed mold 11 and places it on the tray 17. In this case, the positioning portion 202 of the fixed mold 31 is formed with recesses 234-1 and 234-2 that prevent interference with the molded article 401 when the robot 14 removes the molded article 401 from the mold 11, and the movable mold 32 is formed with a recess 103, so that the robot 14 can remove the molded article 401, from which the runner gate 402 has been cut, from the closed mold 11.

[0091] That is, the control device 16 commands the robot controller 15 to operate the robot 14 and cause the robot 14 to take out the molded product 401 .

[0092] In step S24, the control device 16 refers to the number of molded articles 401 that have been injection molded so far, and determines whether or not to mold the next molded article 401. If it is determined in step S24 that the next molded article 401 will be molded, the procedure proceeds to step S25, where injection molding is performed. That is, as in step S12, the control device 16 commands the injection molding machine controller 13 to operate the injection cylinder 28 of the injection molding machine 12, causing molten resin to be injected from the nozzle 29 into the mold 11, and injection molding is performed using the mold 11. The procedure proceeds to step S26.

[0093] If it is determined in step S24 that the next molded product 401 is not to be molded, the procedure of step S25 is skipped and the procedure proceeds to step S26.

[0094] The procedures of steps S24 and S25 are executed in parallel with the procedures of steps S21 and S23.

[0095] In step S26, the control device 16 refers to the number of molded products 401 that have been injection molded so far, and determines whether or not to end the procedure with the current molded product 401. If it is determined in step S26 that the procedure will not end with the current molded product 401, the procedure returns to step S13 and the above-mentioned procedure is repeated. If it is determined in step S26 that the procedure will end with the current molded product 401, the procedure for manufacturing molded products ends.

[0096] In this way, when the mold 11 is open, the molded article 401 is positioned, and when the mold 11 is closed, the gate 404 is cut from the molded article 401 and the molded article 401 is removed. Injection molding is performed in parallel with the removal of the molded article 401. Therefore, when the mold is open, injection molding can be performed, the gate 404 can be cut from the molded article 401 and the molded article 401 can be removed in the same cycle time as conventional injection molding in which the molded article is removed.

[0097] Furthermore, since the mold 11 only needs to be provided with at least the positioning unit 203 and the blade 111 in addition to the robot 14 that removes the molded product 401, the gate 404 can be cut from the molded product 401 without providing any complex dedicated equipment. Furthermore, since the blade 111 is fixed to the movable mold 32, the gate 404 can be cut with greater precision than when the blade is moved by a dedicated actuator.

[0098] In this way, the control device 16 controls the robot 14 that removes the injection-molded molded product 401, and the injection molding machine 12 that uses the mold 11, which is a mold including a fixed mold 31 and a movable mold 32, and is provided with a molding section 81 for molding the molded product 401 of the desired shape by injection molding of resin, and is provided with a positioning unit 231 provided on the fixed mold 31, a blade 111 provided on the movable mold 32, and a cutting section 82 that includes a recess 103 provided on the movable mold 32 to prevent interference between the closed fixed mold 31 and movable mold 32 and the robot 14.

[0099] The program executed by the control device 16 instructs the robot 14 to hold the molded product 401 with the runner gate 402 molded in the molding section 81 so that it is positioned by the positioning unit 231 when the fixed mold 31 and the movable mold 32 are open in step S20, and in step S21, to close the fixed mold 31 and the movable mold 32 in the injection molding machine 12, and to position the molded product 401 in the positioning unit 231 by the displacement of the movable mold 32. The gate 404 is cut from the molded product 401 by the blade 111 of the cutting section 82, and in step S23, the robot 14 is caused to remove the molded product 401, from which the gate 404 has been cut by the blade 111, through the recess 103 from the mold 11 when the fixed mold 31 and the movable mold 32 are closed, and in step S25, the control device 16 is caused to perform a process in the injection molding machine 12 to injection-mold the molded product 401 in the molding section 81 when the fixed mold 31 and the movable mold 32 are closed.

[0100] The injection molding system 1 also includes a mold 11 including a fixed mold 31 and a movable mold 32 used for injection molding of resin, an injection molding machine 12 that uses the mold 11, and a robot 14 that removes the injection-molded molded product 401. The mold 11 is provided with a molding section 81 for molding the molded product 401 of a desired shape in the fixed mold 31 and the movable mold 32, and a cutting section 82 that cuts a gate 404 from the molded product 401 molded in the molding section 81.

[0101] The cutting section 82 of the fixed mold 31 is provided with a positioning unit 231 for positioning a molded article 401 having a runner gate 402, which is molded in the molding section 81, when the fixed mold 31 and the movable mold 32 are opened. The cutting section 82 of the movable mold 32 is provided with a blade 111 fixed to the movable mold 32 for cutting the gate 404 from the molded article 401 positioned in the positioning unit 231 by displacement of the movable mold 32 when the fixed mold 31 and the movable mold 32 are closed, and a recess 103 for preventing interference between the robot 14 holding the molded article 401 positioned in the positioning unit 231 and the closed fixed mold 31 and movable mold 32.

[0102] When the fixed mold 31 and the movable mold 32 are open, the robot 14 holds the molded product 401 with the runner gate 402 formed in the molding section 81 so as to position it using the positioning unit 231, and when the fixed mold 31 and the movable mold 32 are closed, the robot 14 removes the molded product 401 with the gate 404 cut off by the blade 111 from the mold 11 through the recess 103.

[0103] As described above, according to the present invention, the runner gate can be cut more accurately at the gate portion without providing complex dedicated equipment and without extending the cycle time required for injection molding.

[0104] The number of cutters 102 and blades 111 is not limited to one, and multiple cutters and blades 111 may be provided. Furthermore, the blades 111 may be configured to cut the runner from the molded product so as to separate it in the Y-axis direction. In this case, the positioning unit 231 is provided to position the molded product at a predetermined position in the Y-axis direction. Furthermore, the positioning plate 232 may be provided integrally with the main body of the fixed mold 31.

[0105] Furthermore, the positioning section 202 may be provided with a holding section that uses negative air pressure to adsorb or lock and hold the molded article 401 positioned by the positioning unit 231 and the positioning plate 232. In this case, for example, when the fixed mold 31 and the movable mold 32 are opened, the gate 404 drops the cut molded article 401, allowing the molded article 401 to be removed from the mold 11.

[0106] The molding section 81 of the mold 11 can be a multi-cavity mold for molding a plurality of molded products. Alternatively, the mold 11 may be divided into a fixed mold 31 and a movable mold 32 for the molding section 81, and a fixed mold 31 and a movable mold 32 for the cutting section 82. In other words, the mold 11 can be divided into a plurality of molds.

[0107] Although it has been described that the movable mold 32 (cutting portion 82) is provided with the cutter 102, recess 103, recess 104, and blade 111, and the fixed mold 31 (cutting portion 82) is provided with the positioning portion 202, positioning unit 231, positioning plate 232, recess 233, and recesses 234-1 and 234-2, it is also possible to provide the movable mold 32 (cutting portion 82) with the positioning portion 202, positioning unit 231, positioning plate 232, recess 233, and recesses 234-1 and 234-2, and the fixed mold 31 (cutting portion 82) with the cutter 102, recess 103, recess 104, and blade 111. In this case as well, the positioning portion 202 can be provided with a holding portion that uses negative air pressure to adsorb or lock and hold the molded product 401 positioned by the positioning unit 231 and positioning plate 232. That is, the cutter 102, the recess 103, the recess 104 and the blade 111 can be provided on either the fixed mold 31 or the movable mold 32, and the positioning portion 202, the positioning unit 231, the positioning plate 232, the recess 233 and the recesses 234-1 and 234-2 can be provided on the other of the fixed mold 31 or the movable mold 32.

[0108] That is, the program instructs a computer that controls an injection molding machine that uses a take-out device that takes out an injection-molded molded product, one or more molds including a fixed mold and a movable mold, a molding section for molding a molded product of a desired shape by injection molding of resin, and a mold that is provided with a cutting section that includes a positioning tool, a blade, and a recess for avoiding interference between the closed fixed mold and the movable mold and the take-out device, to position the molded product with a runner gate attached that has been molded in the molding section by the positioning tool when the fixed mold and the movable mold are open. the injection molding machine executes a process including the steps of: causing the injection molding machine to close the fixed mold and the movable mold and, by displacement of the movable mold, cutting the gate from the molded product positioned at the positioning position with the blade of the cutting unit; causing the removal device to remove the molded product, from which the gate has been cut with the blade, through the recess when the fixed mold and the movable mold are closed; and causing the injection molding machine to injection mold the molded product in the molding unit when the fixed mold and the movable mold are closed.

[0109] That is, the injection molding system is an injection molding system including one or more molds including a fixed mold and a movable mold used for injection molding of resin, an injection molding machine using the molds, and a removal device for removing the injection-molded molded product, wherein the molds are provided with a molding section for molding the molded product of a desired shape in the fixed mold and the movable mold, and a cutting section for cutting a gate from the molded product molded in the molding section, and the cutting section is provided with a positioning tool for positioning the molded product molded in the molding section and having the runner gate attached when the fixed mold and the movable mold are opened, and a blade fixed to the movable mold for cutting the gate from the fixed mold. When the mold and the movable mold are closed, a blade cuts the gate from the molded product positioned at the positioning due to displacement of the movable mold, and a recess is provided to prevent interference between the removal device holding the molded product positioned at the positioning and the closed fixed mold and movable mold, and when the fixed mold and the movable mold are open, the removal device holds the molded product with the runner gate molded in the molding section so that it is positioned at the positioning, and when the fixed mold and the movable mold are closed, the removal device removes the molded product with the gate cut by the blade from the mold through the recess.

[0110] The removal device may be an industrial robot.

[0111] The take-out device may be an articulated industrial robot.

[0112] The take-out device may be configured to suck and hold the molded product by negative air pressure.

[0113] As described above, the mold 11 is used for injection molding of resin. The mold 11 includes a fixed mold 31 and a movable mold 32. The fixed mold 31 and the movable mold 32 are provided with a molding section 81 for molding a molded product of a desired shape, and a cutting section 82 for cutting a gate from the molded product molded in the molding section 81. The mold 11 may be one or more.

[0114] The positioning unit 203 is provided in the cutting section 82 of either the fixed mold 31 or the movable mold 32, and positions the molded product having a runner gate, which is molded in the molding section 81, when the fixed mold 31 and the movable mold 32 are opened.

[0115] The blade 111 is fixed to the other of the fixed mold 31 or the movable mold 32. When the fixed mold 31 and the movable mold 32 are closed, the blade 111 cuts the gate from the molded product positioned in the positioning unit 203 due to the displacement of the movable mold 32.

[0116] The recess 103 is provided in the cutting portion 82 of the fixed mold 31 or the movable mold 32. The recess 103 prevents interference between the robot 14, which is a removal device that removes the molded product and holds the molded product positioned in position, and the closed fixed mold 31 and movable mold 32.

[0117] The recesses 234-1 and 234-2 are provided in the cutting portion 82 of the fixed mold 31 or the movable mold 32. The recesses 234-1 and 234-2 prevent interference with the molded product when the molded product is positioned in the positioning unit 203.

[0118] The recess 233 is provided in the cutting portion 82 of the fixed mold 31 or the movable mold 32. The recess 233 prevents interference with a runner gate attached to the molded product when the molded product is positioned in the positioning unit 203.

[0119] The recess 104 is provided in the cutting portion 82 of the fixed mold 31 or the movable mold 32. When the fixed mold 31 and the movable mold 32 are closed, the recess 104 prevents interference with a runner gate attached to the molded product positioned in the positioning unit 203.

[0120] The ejector pin 112 is provided on the movable mold 32. The ejector pin 112 ejects the runner gate cut from the molded product from the recess 104.

[0121] The positioning unit 203 determines the position where the blade 111 cuts the gate from the molded product.

[0122] The positioning plate 232 is provided in the cutting section 82 of the fixed mold 31 or the movable mold 32. The positioning plate 232 positions a molded product with a runner gate. The positioning plate 232 determines the cutting depth of the blade into the molded product with a runner gate.

[0123] Furthermore, the embodiments of the present invention are not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0124] 1 injection molding system, 11 mold, 12 injection molding machine, 13 injection molding machine controller, 14 robot, 15 robot controller, 16 control device, 17 tray, 20 mold clamping device, 22 injection device, 28 injection cylinder, 29 nozzle, 31 fixed mold, 32 movable mold, 81 molding section, 82 cutting section, 101 molding section, 102 cutter, 103 recess, 104 recess, 105-1 to 105-4 guide pin, 111 blade, 112 to 114 ejector pin, 121-1 to 121-4 positioning hole, 122 gate port, 123 flow path, 201 molding section, 202 positioning section, 206-1 to 206-4 positioning hole, 231 positioning unit, 232 positioning plate, 233 recess, 234-1 and 234-2 recess, 221-1 to 221-4 guide pin, 224 sprue hole, 301 cavity, 302 gate, 303 runner, 304 sprue, 401 molded product, 402 runner gate, 403 runner gate, 404 gate

Claims

1. In one or more molds including a fixed mold and a movable mold used for resin injection molding, The fixed mold and the movable mold are a molding section for molding a molded product having a desired shape; a cutting section for cutting a gate from the molded product molded in the molding section; There is a The cutting portion of either the fixed mold or the movable mold is a first positioning device is provided for positioning the molded product molded in the molding section and having a runner gate when the fixed mold and the movable mold are opened, The cutting portion of the other of the fixed mold and the movable mold, A blade is provided which is fixed to the other of the fixed mold and the movable mold, and when the fixed mold and the movable mold are closed, the blade cuts the gate from the molded product positioned at the position by displacement of the movable mold. Mold.

2. The mold according to claim 1, The cutting section is provided with a first recess for preventing interference between the take-out device that takes out the molded product and holds the molded product positioned at the positioning position and the closed fixed mold and movable mold. Mold.

3. The mold according to claim 2, The cutting portion is provided with a second recess for avoiding interference with the molded product when the molded product is positioned at the first positioning point. Mold.

4. The mold according to claim 3, The cutting portion is provided with a third recess for avoiding interference with the runner gate attached to the molded product when the molded product is positioned at the first positioning position. Mold.

5. The mold according to claim 4, The cutting portion is provided with a fourth recess for avoiding interference with the runner gate attached to the molded product positioned at the first position when the fixed mold and the movable mold are closed. Mold.

6. The mold according to claim 5, The movable mold is provided with an ejector pin for ejecting the runner gate cut from the molded product from the fourth recess. Mold.

7. The mold according to claim 1, The first positioning determines the location where the blade cuts the gate from the molded part. Mold.

8. The mold according to claim 1, the cutting section is provided with a second positioning for positioning the molded product with the runner gate attached, The second positioning determines the depth of the cutting tool's cut into the molded product having the runner gate. Mold.

9. A manufacturing method for manufacturing a molded product using one or more molds including a fixed mold and a movable mold, the molds being provided with a molding section for molding a molded product of a desired shape by resin injection molding, and a positioning section provided on either the fixed mold or the movable mold, and a cutting section consisting of a blade fixed to the other of the fixed mold or the movable mold, When the fixed mold and the movable mold are opened, the molded product molded in the molding section and having a runner gate attached thereto is positioned by the positioning of the cutting section; When the fixed mold and the movable mold are closed, the movable mold is displaced, and the gate is cut from the molded product positioned at the positioning position by the blade of the cutting unit, and the molded product is injection molded in the molding unit. Manufacturing method.

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