Core pulling structure
By designing a core pulling structure containing inclined guide column pushing slider and a shovel machine, the problem that traditional molds cannot achieve asynchronous material deduplication is solved, and the asynchronous material deduplication and shape integrity of the workpiece are achieved.
Patent Information
- Application Number
- CN202421470430.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-26
AI Technical Summary
When traditional molds produce hollow cylindrical workpieces inside, they cannot achieve asynchronous deduplication, resulting in deformation of the workpiece when opening the mold.
A core pulling structure is designed, including a mold core and a core pulling member distributed at both ends of the mold core. The core pulling member is composed of a slider component driven by an inclined guide column and a shovel. The shovel has an inclined surface and a lower vertical surface contact surface, and the delayed sliding of the sliding assembly is achieved through the vertical separation of the shovel.
Asynchronous material removal of the workpiece is achieved, preventing the deformation of the workpiece during demoulding and ensuring the shape integrity of the product.
Smart Images
Figure CN222972661U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mold production, in particular to a core pulling structure. Background Art
[0002] The mold belongs to the molding part in the injection molding structure.
[0003] In reality, the shape of each product is produced through a mold, such as Figure 1 The workpiece shown is no exception, being a cylindrical body with a hollow interior.
[0004] When this kind of workpiece is being prepared, it has a large clamping force with multiple components such as the mold core and mold core of each specific shape in the mold cavity. Due to its relatively small volume, within the numerical range of ±5cm, and its thin-walled structure, this kind of workpiece is destined to be removed only through asynchronous core pulling. Otherwise, when the mold is opened, the workpiece will be deformed due to the tensile forces from multiple aspects at the same time.
[0005] However, when traditional molds are used to produce such workpieces, the design of the mold core limits the workpiece to be prepared in a horizontal position, and the sprouting path coincides with the sliding path of the slider which is part of the cavity. During the production and preparation process, high temperature conditions will cause the sprouting parts to expand. Coincidentally, the sprouting parts are partially surrounded by the structure of the slider during the mold closing process. The expansion causes a near-interference fit between the slider and the sprouting parts. Therefore, the slider will be pulled to open the mold together during sprouting. At this time, the asynchronous stripping becomes synchronous stripping, resulting in varying degrees of deformation in various aspects of the product. Utility Model Content
[0006] In order to solve the above problems, the utility model provides a budding structure, which aims to solve the problem that the traditional mold opening structure cannot realize asynchronous material stripping on the above workpiece.
[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a core pulling structure, comprising a mold core, and core pulling components distributed at both ends of the mold core, the core pulling components being used to pull out the core that cooperates with the mold core for shaping, and characterized in that the core pulling component is composed of a slider component pushed toward the mold core by an inclined guide column and a shovel machine that abuts against the same side of multiple slider components during the mold closing process, the shovel machine having a contact surface abutting against the sliding component, the contact surface being divided by a lower vertical surface and an inclined surface by an angle, and being vertically separated by the shovel machine so that the sliding of the sliding component abutted by the lower vertical surface is delayed after the sliding of other sliding components opposite to the inclined surface.
[0008] Furthermore, any sliding component has an open structure extending towards the contact surface, and the other sliding component is embedded in the above open structure, so that the same side of the sliding component can abut against the contact surface.
[0009] Furthermore, along the extension direction of the open structure, a spring is provided between the two sliding components.
[0010] Furthermore, the through holes provided between the slider components form inclined holes for the inclined guide pillars to pass through after the mold is closed. Among them, the aperture of the through hole corresponding to the lower vertical surface is larger than the diameter of the inclined guide pillar.
[0011] Advantages of the present utility model:
[0012] All are due to the special treatment of the contact surface on the stripper, forming two divisions of the inclined surface and the lower vertical surface in the form of an included angle. Combining with the fact that the demolding action of the stripper itself is a vertical movement path, the sliding component cooperating with the lower vertical surface is kept positioned during the previous demolding action. Thus, during mold opening, the holding pressure on the sliding component corresponding to the inclined surface disappears in advance. Therefore, the withdrawal of the inclined guide pillar can preferentially push the above-mentioned sliding component, so as to achieve the purpose of asynchronous blanking of this workpiece. Description of the drawings
[0013] Figure 1 is a perspective view of the present utility model.
[0014] Figure 2 is Figure 1 the enlarged schematic view of part A of
[0015] Figure 3 is a perspective view of the stripper.
[0016] Figure 4 is Figure 3 the side view of
[0017] Figure 5 is Figure 1 the cross-sectional view of
[0018] Figure 6 is the perspective view of the present utility model with the first slider hidden.
[0019] Figure 7 is the perspective view of the first slider seat.
[0020] Figure 8 is the perspective view of the workpiece. Detailed implementation manners
[0021] This embodiment is a core-pulling mechanism and belongs to a part of the mold.
[0022] Participate Figure 1-8As shown, this core pulling mechanism includes the following parts:
[0023] The rear mold core 1, the first slider 2, the second slider 3, the shovel 4, the inclined guide column 5, and the first slider seat 6;
[0024] The central area of the surface of the rear mold core 1 is provided with a shape that is adapted to the shape of the workpiece 10. Two areas opposite to each other with the central area as the center are provided as a guide groove for the first slider 2 to form a part of the cavity with the central area when the mold is closed. The end of the first slider 2 facing away from the central area is connected to the first slider seat 6. The first slider seat 6 is provided with an open structure 61 adapted to the second slider 3, and the open structure 61 extends to the side of the first slider seat 6 facing away from the first slider 2. Along the extension direction of the open structure 61, inside the first slider seat 6 A spring 7 is provided. During the mold closing process, the spring 7 is in a compressed state (the second slider 3 enters the open structure 61 to compress the spring 7). The sliding power of the second slider 3 is generated by the oblique guide column 5 penetrating into the oblique opening on the second slider 3. After the oblique guide column 5 squeezes the second slider 3, the moving path of the shovel 4 moves vertically downward relative to the horizontal plane. After the shovel 4 moves from top to bottom, it will prevent the first slider 2 and the second slider 3 from being subjected to excessive injection pressure during injection molding and becoming loose on the lower mold plate in the form of resistance.
[0025] The contact surface of the shovel 4 adjacent to the first slider seat 6 is formed by connecting the upper inclined surface 41 and the lower vertical surface 42. The open structure 61 is located on the first slider 2 and extends in the direction of the upper inclined surface 41. The first slider seat 6 and the second slider 3 have a side surface that overlaps the shape of the upper inclined surface 41 and the lower vertical surface 42. When demolding, the shovel 4 moves upward in a vertical manner. Based on the existence of the lower vertical surface 42, the first slider seat 6 is in a state of being positioned and unable to move in the front section of demolding. However, for the second slider 3, the upper inclined surface 41 of the shovel 4 is from the second slider. 3, this separation will lose the positioning and holding of the second slider 3. Under the reset of the spring 7, the second slider 3 withdraws from the first slider seat 6. The second slider 3 is provided with a core 8 that penetrates the first slider 2 and the first slider seat 6. In short, due to the existence of the lower vertical surface 42, it can be stably guaranteed that the position of the first slider 2 cannot be loosened when the core is pulled out. In the latter stage of demoulding, after the core 8 is pulled out, the shovel 4 is completely staggered and separated from the lower vertical surface 42. At this time, the first slider seat 6 will be pushed out of the inclined opening by the inclined guide column 5 to push the first slider 2 out.
[0026] It should be noted that the diameter of the through hole on the first slider 2, which is part of the inclined hole, is larger than the diameter of the inclined guide post 5. As can be seen from the figure, when the mold is closed, the inclined guide post 5 abuts against the first surface 91 of the inclined opening. The inclined guide post 5 moves vertically up and down. In the front stage of demolding, the inclined guide post 5 does not push the first slider 2. However, in the rear stage of demolding, the inclined guide post 5 contacts the second surface 92 and pushes the second slider 3 to move outwards through the second surface 92.
[0027] Therefore, from the above solution, it can be known that due to the special structure of this workpiece 10, when the present utility model produces this workpiece 10, asynchronous stripping can be continuously maintained. In other words, the first slider 2 is subject to delayed stripping, effectively preventing the workpiece 10 from deforming during demolding.
[0028] In this embodiment, the above-mentioned first slider 2 and the first slider seat 6 form a sliding assembly, while the second slider 3 is another sliding assembly.
[0029] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.
Claims
1. A core pulling structure, comprising a mold core and core pulling components distributed at both ends of the mold core, the core pulling components being used to pull out a core that cooperates with the mold core for shaping, characterized in that: The core pulling component is composed of a slider component pushed toward the mold core by an inclined guide column and a shovel machine that abuts against the same side of multiple slider components during the mold closing process. The shovel machine has a contact surface that abuts against the sliding component, and the contact surface is divided by a lower vertical surface and an inclined surface at an angle. The sliding of the sliding component abutted by the lower vertical surface is delayed after the sliding of the sliding component opposite to the inclined surface by vertical separation of the shovel machine.
2. A core pulling structure according to claim 1, characterized in that: Any sliding component has an open structure extending toward the contact surface, and the other sliding component is embedded in the open structure so that the same side of the sliding component can abut against the contact surface.
3. A core pulling structure according to claim 2, characterized in that: A spring is arranged between the two sliding assemblies along the extending direction of the open structure.
4. A core pulling structure according to claim 1, characterized in that: The through holes arranged between the slider assemblies form inclined holes for the inclined guide pillars to pass through after the mold is closed, wherein the aperture of the through hole corresponding to the lower vertical surface is larger than the diameter of the inclined guide pillars.