Injection mold structure and injection molding method

Abstract

This application belongs to the field of injection molds, specifically disclosing an injection mold structure and injection method. It includes a first mold and a second mold adapted to each other, with a molding cavity between the first and second molds. A mold-changing cavity is formed on the first mold, and a guide groove is provided between the mold-changing cavity and the molding cavity, connecting them. The direction of the guide groove is perpendicular to the direction of the mold-changing cavity and the molding cavity. A plurality of molding inserts are arranged along the direction of the guide groove within the mold-changing cavity. The injection mold structure also includes a first driving assembly and a second driving assembly disposed on the first mold. The output end of the first driving assembly is located in the mold-changing cavity. The first driving assembly drives a molding insert through the guide groove into the molding cavity and back into the mold-changing cavity. The second driving assembly drives the molding insert to move within the mold-changing cavity. This application has the effect of improving injection efficiency by increasing the efficiency of molding insert replacement and shortening the injection cycle.

Description

Technical Field

[0001] This application belongs to the field of injection molds, and more specifically, relates to an injection mold structure and an injection method. Background Technology

[0002] Inserts are irregular mold accessories specifically designed to be embedded in molds, serving to fix the template and fill the space between it. Inserts can be square, round, or sheet-shaped. Like all mold accessories, they require very high precision. Generally, there are no finished products; they are custom-made according to the mold's needs. When using injection molds to manufacture plastic products, the inserts are located in the injection cavity. After the mold is closed, the worker first injects the material, then heats it to form the mold, and then opens the moving template to remove the molded part from the mold. This is one work cycle for the injection mold to produce a product. During this cycle, the inserts located between the moving and fixed templates in the mold need to be replaced.

[0003] Traditional insert replacement methods involve setting screw holes in the mold platen and cavity, with a threaded screw connected to these holes. When insert replacement is needed, the operator screws the screw up along the screw hole. Once it reaches a certain height, the insert is slowly ejected from the cavity. After removing the insert, the screw is screwed back to its initial position to perform the replacement. As can be seen, the entire traditional insert replacement process is very time-consuming and labor-intensive, significantly extending the injection molding cycle and ultimately reducing injection molding efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides an injection mold structure and injection method, aiming to improve injection efficiency by increasing the efficiency of changing inserts within the injection mold and shortening the injection cycle.

[0005] This application provides an injection mold structure including a first mold and a second mold adapted to each other, with a molding cavity provided between the first mold and the second mold, and a mold changing cavity provided on the first mold. A guide groove is provided between the mold changing cavity and the molding cavity and is connected through the guide groove. The direction of the guide groove is perpendicular to the direction of the mold changing cavity and the molding cavity. A plurality of molding inserts are arranged in the mold changing cavity along the direction of the guide groove. The injection mold structure also includes a first driving component and a second driving component disposed on the first mold. The output end of the first driving component is located in the mold changing cavity. The first driving component is used to drive one of the molding inserts through the guide groove into the molding cavity and back into the mold changing cavity. The second driving component is used to drive the molding inserts to move within the mold changing cavity, so that different molding inserts move to the output end of the first driving component.

[0006] Compared with the prior art, the above-conceived technical solution of this application, since the molding inserts are all set in the mold changing cavity, the molding inserts are driven to move in the mold changing cavity by the second drive component, so that different molding inserts move to the output end of the first drive component. Then, the first drive component can drive the molding inserts through the guide groove into the molding cavity for processing. The first drive component drives the molding inserts back to the mold changing cavity, and the second drive component drives the molding inserts to move in the mold changing cavity, so as to replace the molding inserts at the output end of the first drive component, realize the processing of different injection molded parts, and the replacement of molding inserts does not require manual operation, which is more efficient. By improving the replacement efficiency of molding inserts, the injection cycle is shortened, thereby improving the injection efficiency.

[0007] As a further preferred embodiment, several of the molded inserts are arranged along the direction of the guide groove, and the inner wall of the guide groove is in contact with the outer wall of the molded insert.

[0008] By adopting the above technical solution, the molded insert can easily enter the guide groove, and when the molded insert enters the guide groove, it seals the guide groove. When the molded insert enters the molding cavity, it makes the molding cavity a closed space, which facilitates injection molding.

[0009] As a further preferred embodiment, the first drive assembly includes a first hydraulic cylinder, a connecting rod, and a locking block. The first hydraulic cylinder is fixedly connected to the first mold, and the piston rod of the first hydraulic cylinder is located on the same axis as the guide groove. One end of the connecting rod is coaxially fixedly connected to the piston rod of the first hydraulic cylinder, and the locking block is fixedly connected to the other end of the connecting rod. The molding insert is movably sleeved on the locking block.

[0010] By adopting the above technical solution, the moved molded insert is fitted onto the locking block, and then the connecting rod and the locking block are driven by the first oil cylinder to move along the axis of the piston rod, thereby stably driving the molded insert to move. The operation is simple and easy to control.

[0011] As a further preferred embodiment, one end of the molded insert is provided with a slot, the slot extends to both sides to form an opening, and the molded insert moves in the mold changing cavity to allow the locking block to be inserted into the slot from the opening.

[0012] By adopting the above technical solution, the molded insert moves under the drive of the second drive component, so that the card block can enter the card slot from one opening, thereby completing the molded insert being fitted onto the card block. When the molded insert continues to move, the card block moves out of the card slot from the other opening, so that another molded insert can be fitted onto the card block. The molded insert is easy to replace, improving the replacement efficiency.

[0013] As a further preferred embodiment, the outer wall of the molded insert is provided with a limiting groove, and the mold changing cavity is provided with a limiting strip that fits against the inner wall of the limiting groove, and the setting direction of the limiting strip is the same as the setting direction of the mold changing cavity.

[0014] By adopting the above technical solution, the limiting strip limits the movement of the molding insert, making the molding insert more stable when it moves in the mold changing cavity, so that the first drive component can drive it into the molding cavity for injection molding of the part.

[0015] As a further preferred embodiment, the second drive assembly includes two second hydraulic cylinders and two push blocks. The second hydraulic cylinders are fixedly connected to the first mold, and the piston rods of the second hydraulic cylinders extend into the mold changing cavity and are in the same direction as the mold changing cavity. The push blocks are fixedly connected to the piston rods of the corresponding second hydraulic cylinders.

[0016] By adopting the above technical solution, the second hydraulic cylinder is activated to drive the push block to move, thereby driving the molding insert in the mold changing cavity to move. When the molding insert needs to move to one side, the second hydraulic cylinder on the other side is activated accordingly, thereby realizing the movement of the molding insert.

[0017] As a further preferred embodiment, the second drive assembly includes a drive motor, a screw, and two push plates. The drive motor is fixedly connected to the first mold, the screw is coaxially fixedly connected to the output shaft of the drive motor, the two push plates are both located in the molding cavity and are slidably arranged along the setting direction of the molding cavity, the bottom of the two push plates are threadedly connected to the screw, and a plurality of molding inserts are located between the two push plates.

[0018] By adopting the above technical solution, the drive motor can drive the two push plates to move synchronously in the mold changing cavity by reversing forward and reverse, thereby driving the molded insert to move. Only one set of drive components is required, reducing costs.

[0019] As a further preferred embodiment, the first mold has a discharge port for storing sheet metal parts, the discharge port is connected to the guide groove, and the molding insert pushes the parts in the discharge port into the molding cavity.

[0020] By adopting the above technical solution, the sheet metal part enters the guide groove from the blanking port. When the molding insert passes through the guide groove and enters the molding cavity, it pushes the sheet metal part into the molding cavity, thereby realizing the integrated sheet metal and plastic molding process and improving the applicability of the injection mold structure.

[0021] As a further preferred embodiment, the discharge port is arranged in a vertical direction.

[0022] By adopting the above technical solution, the sheet metal parts in the discharge port can automatically fall into the guide groove under the action of gravity. When the forming insert moves, it pushes the sheet metal parts in the guide groove into the forming cavity. The outer wall of the forming insert blocks the sheet metal parts in the discharge port from falling. When the forming insert exits the guide groove, the sheet metal parts fall into the guide groove for further processing.

[0023] This application provides an injection molding method using the above-mentioned injection mold structure, comprising the following steps:

[0024] Step 1: The second drive component drives the molding insert to move within the mold changing cavity, causing one molding insert to move to the output end of the first drive component;

[0025] Step 2: The first drive assembly drives the molding insert through the guide groove into the molding cavity for injection molding.

[0026] Step 3: The first drive component drives the molding insert back into the mold changing cavity;

[0027] Step 4: The second drive component drives the molding insert to move within the mold changing cavity again, thereby replacing the molding insert at the output end of the first drive component.

[0028] In summary, this application includes at least the following beneficial technical effects:

[0029] By placing all the molding inserts within the mold changing cavity, the second drive assembly drives the molding inserts to move within the mold changing cavity, allowing different molding inserts to move to the output end of the first drive assembly. The first drive assembly then drives the molding inserts through the guide groove into the molding cavity for processing. The first drive assembly drives the molding inserts back into the mold changing cavity, and the second drive assembly drives the molding inserts to move within the mold changing cavity, facilitating the replacement of the molding inserts at the output end of the first drive assembly. This enables the processing of different injection molded parts, and the replacement of molding inserts requires no manual operation, resulting in higher efficiency. By improving the replacement efficiency of molding inserts, the injection molding cycle is shortened, thereby improving injection molding efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0031] Figure 2 This is a partial cross-sectional structural diagram of Example 1;

[0032] Figure 3 yes Figure 1 Schematic diagram of the cross section along line AA;

[0033] Figure 4 yes Figure 1 Schematic diagram of cross section along line BB;

[0034] Figure 5This is a schematic diagram of the overall structure of the connection between the molded insert and the first drive assembly, as shown in Embodiment 1;

[0035] Figure 6 This is a schematic diagram of the overall structure of Example 2.

[0036] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0037] 1. First mold; 2. Second mold; 3. Molding cavity; 4. Mold changing cavity; 41. Limiting strip; 5. Guide groove; 6. Molding insert; 61. Slot; 62. Opening; 63. Limiting groove; 7. First drive assembly; 71. First hydraulic cylinder; 72. Connecting rod; 73. Locking block; 8. Second drive assembly; 81. Second hydraulic cylinder; 82. Push block; 83. Drive motor; 84. Screw; 85. Push plate; 9. Discharge port. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0043] This application discloses an injection mold structure.

[0044] Example 1:

[0045] Reference Figure 1-5 An injection mold structure includes a first mold 1, a second mold 2, a first drive assembly 7, and a second drive assembly 8. The first mold 1 and the second mold 2 are adapted to each other, and a molding cavity 3 is provided between the first mold 1 and the second mold 2. An injection opening 62 for injection molding is also provided. The first mold 1 has a mold changing cavity 4. A guide groove 5 is provided between the mold changing cavity 4 and the molding cavity 3 and is connected through the guide groove 5. The direction of the guide groove 5 is perpendicular to the direction of the mold changing cavity 4 and the molding cavity 3. Several molding inserts 6 are arranged in parallel along the direction of the mold changing cavity 4. The molding inserts 6 pass through the guide groove 5 and enter the mold changing cavity 4 for injection molding. The molding inserts 6 have different shapes and structures. Different molding inserts 6 can be processed into parts with different structures by entering the molding groove. By quickly changing the molding inserts 6, the injection molding efficiency and part processing efficiency are improved.

[0046] The first driving assembly 7 and the second driving assembly 8 are both disposed on the first mold 1. The second driving assembly 8 is used to drive the molding insert 6 to move in the mold changing cavity 4 along the setting direction of the mold changing cavity 4, so that different molding inserts 6 move to the output end of the first driving assembly 7. The output end of the first driving assembly 7 is located in the mold changing cavity 4. The first driving assembly 7 drives a molding insert 6 to pass through the guide groove 5 into the molding cavity 3 and return to the mold changing cavity 4.

[0047] In this process, the arrangement direction of several molding inserts 6 is the same as that of the guide groove 5, and the inner wall of the guide groove 5 is in contact with the outer wall of the molding insert 6. After the molding insert 6 enters the guide groove 5, it seals the guide groove 5, so that the molding cavity 3 forms a closed space to facilitate injection molding.

[0048] To drive the molding insert 6 to move within the mold changing cavity 4, in this embodiment, the second driving assembly 8 includes two second hydraulic cylinders 81 and two push blocks 82. The second hydraulic cylinders 81 are fixedly connected to the first mold 1, and the piston rods of the second hydraulic cylinders 81 extend into the mold changing cavity 4 and are in the same direction as the mold changing cavity 4. The push blocks 82 are fixedly connected to the piston rods of the corresponding second hydraulic cylinders 81. Activating the second hydraulic cylinders 81 drives the push blocks 82 to move, thereby driving the molding insert 6 within the mold changing cavity 4 to move. When the molding insert 6 needs to move to one side, the corresponding second hydraulic cylinder 81 on the other side is activated. The molding insert 6 can move to the output end of the first driving assembly 7 so that the first driving assembly 7 can drive its movement. To improve the stability of the movement of the molding insert 6, a limiting groove 63 is provided on the outer wall of the molding insert 6. A limiting strip 41, which fits against the inner wall of the limiting groove 63, is integrally formed in the mold changing cavity 4. The setting direction of the limiting strip 41 is the same as the setting direction of the mold changing cavity 4.

[0049] In this embodiment, the first driving assembly 7 includes a first hydraulic cylinder 71, a connecting rod 72, and a locking block 73. The first hydraulic cylinder 71 is fixedly connected to the first mold 1, and the piston rod of the first hydraulic cylinder 71 and the guide groove 5 are located on the same axis. One end of the connecting rod 72 is coaxially fixedly connected to the piston rod of the first hydraulic cylinder 71. The locking block 73 is fixedly connected to the other end of the connecting rod 72. The molding insert 6 is movably sleeved on the locking block 73. Specifically, the molding insert 6 has a locking groove 61 at one end near the first hydraulic cylinder 71. The locking groove 61 extends to both sides to form openings 62. The molding insert 6 moves in the mold changing cavity 4 so that the locking block 73 is inserted into the locking groove 61 from the opening 62. After moving, the molding insert 6 is sleeved on the locking block 73. Then, the first hydraulic cylinder 71 drives the connecting rod 72 and the locking block 73 to move along the axial direction of the piston rod, thereby stably driving the molding insert 6 to move.

[0050] In this embodiment, the first mold 1 has a discharge port 9 for storing sheet metal parts. The discharge port 9 is arranged vertically and gradually narrows from top to bottom. The discharge port 9 is connected to the guide groove 5, so that the lowermost sheet metal part can enter the guide groove 5. Through the movement of the molding insert 6, the part in the discharge port 9 can be pushed into the molding cavity 3, thereby realizing the integrated sheet metal and plastic molding process, improving the applicability of the injection mold structure. The sheet metal part in the discharge port can automatically fall into the guide groove 5 under the action of gravity. When the molding insert 6 moves, it pushes the sheet metal part in the guide groove 5 into the molding cavity 3. The outer wall of the molding insert 6 blocks the sheet metal part in the discharge port from falling. When the molding insert 6 exits the guide groove 5, the sheet metal part falls into the guide groove 5 for further processing.

[0051] This application also discloses an injection molding method using the above-described injection mold structure, comprising the following steps:

[0052] Step 1: The second drive assembly 8 drives several molding inserts 6 to move within the mold changing cavity 4, so that one molding insert 6 moves to the output end of the first drive assembly 7;

[0053] Step 2: The first drive assembly 7 drives the molding insert 6 through the guide groove 5 into the molding cavity 3 for injection molding. Specifically, the molding insert 6 is fitted onto the clamping block 73, and the first hydraulic cylinder 71 pushes the connecting rod 72 and the clamping block 73 to move the molding insert 6.

[0054] Step 3: The first drive assembly 7 drives the molding insert 6 back into the mold changing cavity 4. Specifically, the first hydraulic cylinder 71 pulls the connecting rod 72 and the locking block 73, thereby moving the molding insert 6.

[0055] Step 4: The second drive component 8 drives the molding insert 6 to move within the mold changing cavity 4 again, thereby replacing the molding insert 6. The movement of the molding insert 6 causes the molding insert 6 located at the output end of the first drive component 7 to be replaced.

[0056] Example 2:

[0057] Reference Figure 6 The difference between this embodiment and embodiment 1 is that the second drive assembly 8 includes a drive motor 83, a screw 84, and two push plates 85. The drive motor 83 is fixedly connected to the first mold 1, and the screw 84 is coaxially fixedly connected to the output shaft of the drive motor 83. Both push plates 85 are located in the mold changing cavity 4 and are slidably arranged along the setting direction of the mold changing cavity 4. The bottom of both push plates 85 are threadedly connected to the screw 84. Specifically, a groove can be opened in the lower part of the mold changing cavity 4 so that the screw 84 is located in the groove and the bottom of the push plate 85 extends into the groove. Several molding inserts 6 are located between the two push plates 85. The drive motor 83 can drive the two push plates 85 to move synchronously in the mold changing cavity 4 by forward and reverse rotation, thereby driving several molding inserts 6 to move, so that the molding inserts 6 sleeved on the clamping block 73 can be replaced. Only one set of drive motors 83 is required to realize the reciprocating movement of the molding inserts 6, which reduces the cost.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold structure, characterized in that, It includes a first mold (1) and a second mold (2) that are compatible with each other. A forming cavity (3) is provided between the first mold (1) and the second mold (2). A mold changing cavity (4) is provided on the first mold (1). A guide groove (5) is provided between the mold changing cavity (4) and the forming cavity (3) and is connected through the guide groove (5). The setting direction of the guide groove (5) is perpendicular to the setting direction of the mold changing cavity (4) and the forming cavity (3). A plurality of forming inserts (6) are arranged in the mold changing cavity (4) along the setting direction. The injection mold structure further includes a first drive assembly (7) and a second drive assembly (8) disposed on the first mold (1). The output end of the first drive assembly (7) is located in the mold changing cavity (4). The first drive assembly (7) is used to drive a molding insert (6) through the guide groove (5) into the molding cavity (3) and back into the mold changing cavity (4). The second drive assembly (8) is used to drive the molding insert (6) to move within the mold changing cavity (4), so that different molding inserts (6) move to the output end of the first drive assembly (7).

2. The injection mold structure according to claim 1, characterized in that, Several of the molded inserts (6) are arranged along the setting direction of the guide groove (5), and the inner wall of the guide groove (5) is in contact with the outer wall of the molded insert (6).

3. The injection mold structure according to claim 1, characterized in that, The first drive assembly (7) includes a first hydraulic cylinder (71), a connecting rod (72), and a locking block (73). The first hydraulic cylinder (71) is fixedly connected to the first mold (1), and the piston rod of the first hydraulic cylinder (71) is located on the same axis as the guide groove (5). One end of the connecting rod (72) is coaxially fixedly connected to the piston rod of the first hydraulic cylinder (71). The locking block (73) is fixedly connected to the other end of the connecting rod (72). The molding insert (6) is movably sleeved on the locking block (73).

4. The injection mold structure according to claim 3, characterized in that, One end of the molding insert (6) is provided with a slot (61), the slot (61) extends to both sides to form an opening (62), and the molding insert (6) moves in the mold changing cavity (4) so ​​that the locking block (73) is inserted into the slot (61) from the opening (62).

5. The injection mold structure according to claim 1, characterized in that, The outer wall of the molding insert (6) is provided with a limiting groove (63), and the mold changing cavity (4) is provided with a limiting strip (41) that fits against the inner wall of the limiting groove (63). The setting direction of the limiting strip (41) is the same as the setting direction of the mold changing cavity (4).

6. The injection mold structure according to claim 1, characterized in that, The second drive assembly (8) includes two second cylinders (81) and two push blocks (82). The second cylinders (81) are fixedly connected to the first mold (1). The piston rod of the second cylinder (81) extends into the mold changing cavity (4) and is in the same direction as the mold changing cavity (4). The push block (82) is fixedly connected to the piston rod of the corresponding second cylinder (81).

7. The injection mold structure according to claim 1, characterized in that, The second drive assembly (8) includes a drive motor (83), a screw (84) and two push plates (85). The drive motor (83) is fixedly connected to the first mold (1). The screw (84) is coaxially fixedly connected to the output shaft of the drive motor (83). The two push plates (85) are both located in the mold changing cavity (4) and are slidably arranged along the setting direction of the mold changing cavity (4). The bottom of the two push plates (85) are threadedly connected to the screw (84). A plurality of the molding inserts (6) are located between the two push plates (85).

8. The injection mold structure according to claim 1, characterized in that, The first mold (1) has a feeding port (9) for storing sheet metal parts. The feeding port (9) is connected to the guide groove (5). The molding insert (6) pushes the parts in the feeding port (9) into the molding cavity (3).

9. The injection mold structure according to claim 8, characterized in that, The discharge port (9) is set in the vertical direction.

10. An injection molding method, wherein the injection mold structure described in any one of claims 1-9 is used, characterized in that, Includes the following steps: Step 1: The second drive assembly (8) drives the molding insert (6) to move within the mold changing cavity (4), so that one molding insert (6) moves to the output end of the first drive assembly (7); Step 2: The first drive assembly (7) drives the molding insert (6) through the guide groove (5) into the molding cavity (3) for injection molding; Step 3: The first drive assembly (7) drives the molding insert (6) back into the mold changing cavity (4); Step 4: The second drive component (8) drives the molding insert (6) to move within the mold changing cavity (4) again, thereby replacing the molding insert (6).

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