Linkage core pulling device for a mold

Abstract

This utility model discloses a linked core-pulling device for a mold, including a slider and a core-pulling assembly disposed on the slider. The core-pulling assembly moves with the slider along a first direction. The core-pulling assembly includes a rotating component, a positioning component, and a driving component. The rotating component is disposed in the receiving cavity of the slider, and its end head is threaded, protruding from the slider and extending into the forming cavity of the mold. The outer surface of the rotating component is provided with annular teeth and annular grooves, the annular grooves being spiral-shaped. The positioning component is disposed in the slider and corresponding to the annular grooves. The driving component meshes with the annular teeth. This utility model achieves core-pulling and demolding without manual operation, significantly improving production efficiency; it also reduces the dimension in the first direction, which is beneficial for reducing the mold width.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a linked core-pulling device for molds. Background Technology

[0002] The core-pulling structure is a crucial part of injection mold design, primarily used to solve the problem of product jamming during demolding caused by undercuts, side holes, or complex structures. Currently, when forming threaded holes in injection molds, a pre-machined threaded core is typically installed inside the cavity. After injection molding, the core is removed along with the molded product, and then demolded by manually rotating the core. For example, patent publication number CN108788024A discloses a similar technical solution. However, the above demolding method is inefficient and difficult to implement for rapid production. Utility Model Content

[0003] The purpose of this invention is to solve the technical problem of low manual demolding efficiency in existing screw hole forming processes.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted:

[0005] A linkage core-pulling device for a mold includes a slider and a core-pulling assembly disposed on the slider. The core-pulling assembly moves with the slider in a first direction. The core-pulling assembly includes a rotating component, a positioning component, and a driving component. The rotating component is disposed in the receiving cavity of the slider. The end of the rotating component is threaded, protruding from the slider and extending into the forming cavity of the mold. The outer surface of the rotating component is provided with annular teeth and annular grooves. The annular grooves are spiral-shaped. The positioning component is disposed in the slider and is correspondingly disposed with the annular grooves. The driving component meshes with the annular teeth.

[0006] In some embodiments, the rotation axis of the rotating member is arranged along a first direction, and the annular groove and annular teeth are arranged around the rotation axis.

[0007] In some embodiments, the slider is provided with a mounting plate, which closes or opens the receiving cavity. The mounting plate is provided with a positioning hole, which is perpendicular to the rotation axis, and a positioning element is disposed in the positioning hole.

[0008] In some embodiments, the mounting plate is provided with a guide hole that extends outward from one side of the mounting plate, and the rotating member passes through the guide hole with its end exposed.

[0009] In some embodiments, the end of the positioning member is provided with a ball, which presses against the annular groove.

[0010] In some embodiments, the slider has an oblique hole for receiving an oblique pin, which moves in a second direction to drive the slider to move in a first direction, the first direction being perpendicular to the second direction.

[0011] In some embodiments, there are multiple core-pulling components, which are arranged in parallel.

[0012] In some embodiments, the annular teeth of two adjacent sets of core-pulling assemblies mesh with the drive gear of the drive assembly.

[0013] In some embodiments, the inclined pin is disposed in the upper mold, the slider is disposed between the upper mold and the lower mold, the molding cavity is disposed between the upper mold and the lower mold, and the driving assembly is disposed below the slider.

[0014] The linkage core-pulling device for molds provided by this utility model has the following advantages:

[0015] This invention uses a rotating component to provide the forming thread. Through the linkage between the slider and the rotating component, core pulling and demolding are achieved without manual operation, which significantly improves production efficiency. In addition, the slider and the rotating component are set separately, which makes it easy to replace the rotating component according to the required thread, making it more flexible to use. The drive component and the ring tooth adopt an upper and lower meshing method, which reduces the size in the first direction and helps to reduce the mold width. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a linkage core-pulling device for a mold provided in an embodiment of this utility model.

[0018] Figure 2 This is an exploded view of a linkage core-pulling device for a mold provided in an embodiment of this utility model.

[0019] Figure 3 This is a cross-sectional view of a mold linkage core-pulling device provided in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of a mold provided in an embodiment of the present utility model.

[0021] In the attached diagram

[0022] 1. Slider; 2. Core-pulling assembly; 21. Rotating component; 22. Positioning component; 23. Drive assembly; 211. End head; 212. Thread; 213. Annular groove; 214. Annular tooth; 221. Sphere; 231. Drive gear; 232. Drive rod; 3. Molding cavity; 10. Product; 4. Mounting plate; 41. Positioning hole; 42. Guide hole; 12. Angled hole; 5. Angled pin; 30. Upper mold; 20. Lower mold; 31. First direction; 32. Second direction; S. Rotation axis. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] In this embodiment, "several" and "more than" refer to two or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figures 1 to 4As shown, this embodiment provides a linked core-pulling device for a mold, including a slider 1 and a core-pulling assembly 2 disposed on the slider 1. The core-pulling assembly 2 moves along the slider 1 in a first direction (X-axis). The core-pulling assembly 2 includes a rotating member 21, a positioning member 22, and a driving assembly 23. The rotating member 21 is disposed in the receiving cavity 11 of the slider 1 and is cylindrical. The end head 211 of the rotating member 21 is provided with a thread 212, which is disposed on the periphery of the end head 211. The end head 211 protrudes from the slider 1 and extends into the mold forming cavity 3, so that when the product 10 is formed in the forming cavity 3, a thread can be formed on the product. The outer surface of the rotating component 21 is provided with annular teeth 214 and annular groove 213. The annular groove 213 is spiral-shaped. The positioning component 22 is disposed in the slider 1 and is correspondingly disposed with respect to the annular groove 213, so that the positioning component 22 can be inserted into the annular groove 213. The rotation axis S of the rotating component 21 is arranged along a first direction, and the annular groove 213 and annular teeth 214 are arranged around the rotation axis S. When the rotating component 21 rotates, the annular groove 213 rotates accordingly, thereby allowing the annular component to move back and forth. Specifically, the end of the positioning component 22 is provided with a ball 221, which presses against the annular groove 213. The positioning component can be a spring plunger. The driving assembly 23 meshes with the annular teeth 214, and the driving assembly 23 drives the annular teeth 214 to rotate, which in turn drives the rotating component 21 to rotate. Specifically, the drive assembly 23 includes a drive gear 231 and a drive rod 232. The drive gear 231 is sleeved on the drive rod 232, and the drive rod 232 is connected to a motor. The motor causes the drive rod 232 to rotate, thereby driving the drive gear 231 to rotate.

[0027] In the above technical solution, before injection molding, the slider 1 drives the core-pulling assembly 2 to move towards the molding cavity 3, so that the end head 211 is inserted into the molding cavity 3. After the product is molded, the end head 211 is embedded in the product 10. At this time, the slider 1 is moved away from the molding cavity 3. Since the rotating part 21 is connected to the product and cannot move, the ball 221 of the positioning part 22 can be dislodged from the annular groove 213 due to the pressure against the internal spring. This is a conventional structure of an elastic plunger. Therefore, the slider 1 can move away from the molding cavity 3, and then the drive assembly 23 drives the annular tooth 214 to rotate the rotating part 21, so that the thread 212 can be dislodged from the product. Through the above technical solution, the molded product can be quickly separated from the rotating part, improving processing efficiency. In addition, the slider and the rotating part are set separately, which makes it easy to replace the rotating part according to the required thread, making it more flexible to use. The drive assembly and the annular tooth adopt an upper and lower meshing method, which reduces the size in the first direction and helps to reduce the mold width.

[0028] Furthermore, the slider 1 is provided with a mounting plate 4, which closes or opens the receiving cavity 11 to facilitate the assembly and disassembly of the rotating component. The mounting plate 4 and the slider 1 are assembled with screws. The mounting plate 4 is provided with a positioning hole 41, which is perpendicular to the rotation axis S. The positioning component 22 is disposed in the positioning hole 41, so that the positioning component 22 can be perpendicular to the annular groove 213, which facilitates the installation of the positioning component 22. The mounting plate 4 is provided with a guide hole 42, which extends outward from one side of the mounting plate 4. The rotating component 21 passes through the guide hole 42, with its end head 211 protruding from the guide hole 42. Through the guidance of the guide hole 42, the movement of the rotating component 21 in the first direction can be made smoother.

[0029] Furthermore, the slider 1 has an oblique hole 12 for accommodating the oblique pin 5. The oblique pin 5 moves in the second direction (Y-axis), driving the slider 1 to move along the first direction, which is perpendicular to the second direction. Specifically, the oblique pin 5 is disposed in the upper mold 30, the slider 1 is disposed between the upper mold 30 and the lower mold 20, the forming cavity 3 is disposed between the upper mold 30 and the lower mold 20, and the driving assembly 23 is disposed below the slider 1. When the upper mold 30 and the lower mold 20 are closed, the oblique pin 5 is inserted into the oblique hole 12, pushing the slider 1 towards the forming cavity 3 until the upper mold 30 and the lower mold 20 are closed. When the forming is completed, when the upper mold 30 opens along the second direction, it drives the oblique pin 5 upward, and the oblique pin 5 pushes the slider 1 to move outward.

[0030] Furthermore, there are multiple core-pulling components 2 arranged in parallel, thereby enabling the forming of multiple threaded holes on the product. The annular teeth 214 of two adjacent sets of core-pulling components 2 mesh with the drive gear 231 of the drive assembly. When the formed product requires reverse threaded holes, the two annular teeth 214 are driven by one drive gear 231, ensuring that the two annular teeth 214 disengage synchronously and improving the demolding efficiency of rotating parts.

[0031] This embodiment uses a rotating component to provide the forming thread. The core pulling and demolding are achieved through the linkage between the slider and the rotating component, eliminating the need for manual operation and significantly improving production efficiency. In addition, the slider and the rotating component are set separately, which makes it easy to replace the rotating component according to the required thread, making it more flexible to use. The drive component and the ring tooth adopt an upper and lower meshing method, which reduces the size in the first direction and helps to reduce the mold width.

[0032] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A linkage core-drawing device of a mold, characterized by comprising: The device includes a slider and a core-pulling assembly disposed on the slider. The core-pulling assembly moves with the slider in a first direction. The core-pulling assembly includes a rotating component, a positioning component, and a driving component. The rotating component is disposed in the receiving cavity of the slider. The end of the rotating component is threaded and protrudes from the slider and extends into the forming cavity of the mold. The outer surface of the rotating component is provided with annular teeth and annular grooves. The annular grooves are spiral-shaped. The positioning component is disposed in the slider and is disposed corresponding to the annular grooves. The driving component meshes with the annular teeth.

2. The linkage core-pulling device for the mold according to claim 1, characterized in that, The rotation axis of the rotating component is arranged along the first direction, and the annular groove and annular teeth are arranged around the rotation axis.

3. The linkage core-pulling device for the mold according to claim 1, characterized in that, The slider is provided with a mounting plate, which can close or open the receiving cavity. The mounting plate is provided with a positioning hole, which is set perpendicular to the rotation axis, and the positioning element is set in the positioning hole.

4. The linkage core-pulling device for the mold according to claim 3, characterized in that, The mounting plate is provided with a guide hole that extends outward from one side of the mounting plate. The rotating component passes through the guide hole and its end head protrudes from the guide hole.

5. The linkage core-pulling device for the mold according to claim 1, characterized in that, The positioning element has a ball at its end, which presses against the annular groove.

6. The linkage core-pulling device for the mold according to claim 1, characterized in that, The slider has an oblique hole for accommodating an oblique pin. The oblique pin moves in the second direction, causing the slider to move along the first direction. The first direction and the second direction are perpendicular to each other.

7. The linkage core-pulling device for the mold according to claim 6, characterized in that, There are multiple core-pulling components, which are arranged in parallel.

8. The linkage core-pulling device for the mold according to claim 7, characterized in that, The annular teeth of two adjacent sets of core-pulling components mesh with the drive gear of the drive component.

9. The linkage core-pulling device for the mold according to claim 6, characterized in that, The inclined pin is disposed on the upper mold, the slider is disposed between the upper mold and the lower mold, the forming cavity is disposed between the upper mold and the lower mold, and the driving component is disposed below the slider.

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