Sliding core-pulling mechanism and injection mold
By designing a sliding core-pulling mechanism, the problem of existing injection molds being unable to pull cores simultaneously has been solved, enabling efficient molding of undercut structures in automotive plastic products, simplifying the production process and improving quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU AEROSPACE MOLD & PLASTIC CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-28
AI Technical Summary
Existing injection molds cannot simultaneously pull cores in two different directions, which makes it impossible to effectively form the undercut structure of automotive plastic products. They need to be injected and assembled separately, which increases costs and reduces efficiency.
Design a sliding core-pulling mechanism, including a slider, a pusher, and an inclined top. By using the inclined top and the slider to cooperate in an inclined manner, the first and second inverted latches can be pulled in different directions. The limiting block and limiting mechanism are used to ensure that the core pulling is carried out smoothly.
This technology enables injection molding of special inverted structures, simplifying the production process, reducing costs, improving production efficiency, and ensuring product quality.
Smart Images
Figure CN224170367U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of injection molding technology, specifically relating to a sliding core-pulling mechanism and an injection mold. Background Technology
[0002] In automotive plastic products, to meet product functional requirements, there are undercut structures in two different directions at the same location on the product. Ordinary core-pulling mechanisms can only pull the core in one direction, making it impossible to remove the core from the undercut structure, thus failing to meet the requirements of product injection molding.
[0003] Currently, products with this type of inverted structure along two different directions usually need to be split into two parts, each requiring a separate mold for injection molding. This not only increases injection molding costs but also necessitates subsequent assembly, making the production process cumbersome, inefficient, and difficult to guarantee product quality. Utility Model Content
[0004] The purpose of this invention is to provide a sliding core-pulling mechanism and injection mold to solve the problems existing in the injection molding of products with special undercut structures.
[0005] This utility model is achieved through the following technical solution:
[0006] A sliding core-pulling mechanism is used for forming an undercut structure on a product. The undercut structure has a first undercut and a second undercut, and the core-pulling directions of the first undercut and the second undercut are perpendicular to each other. The sliding core-pulling mechanism includes:
[0007] A slider is capable of moving relative to the moving template along the core-pulling direction of the first undercut, and the slider is provided with a first core-pulling component for forming the first undercut;
[0008] A push block, which is fixedly connected to the moving template;
[0009] The inclined top has a guide groove on the slider that cooperates with the inclined top. The guide groove is inclined relative to the direction of slider movement. The push block has a sliding groove that is arranged along the core-pulling direction of the second inverted button. One end of the inclined top has a sliding member that extends into the sliding groove. The other end of the inclined top has a second core-pulling member for forming the second inverted button.
[0010] In some embodiments, a limiting block is provided on the slider, and the limiting block is disposed above the guide groove to restrict the inclined pin from disengaging from the guide groove.
[0011] In some embodiments, the limiting block is provided with a limiting notch that cooperates with the slider. The limiting notch and the slider cooperate to restrict the inclined top from being pulled out of the guide groove.
[0012] In some embodiments, a limiting mechanism is provided between the inclined pin and the slider. The limiting mechanism is used to restrict the movement of the inclined pin on the slider. When the slider moves under the action of an external force, the limiting mechanism can release the restriction on the movement of the slider under the action of the slider.
[0013] In some embodiments, the limiting mechanism includes a limiting member and an elastic reset member. The limiting member is slidably engaged with the slider, enabling the limiting member to move in a direction away from and towards the slider. The elastic reset member is disposed between the slider and the limiting member and is used to provide a force to the limiting member to move in the direction of the slider.
[0014] The limiting member is provided with a limiting protrusion, and the inclined top is provided with two limiting grooves that cooperate with the limiting protrusion, which are used to limit the inclined top at the positions of the two limiting grooves.
[0015] In some embodiments, along the sliding direction of the inclined top, the limiting protrusion and the limiting groove are provided with two wedge-shaped surfaces that are arranged opposite to each other.
[0016] On the other hand, this utility model also provides an injection mold, including a moving template and the aforementioned sliding core-pulling mechanism.
[0017] In some embodiments, the system further includes a hydraulic cylinder for driving a slider to move along the core-pulling direction of the first inverted tab, wherein the slider and the moving template are slidably connected in the core-pulling direction of the first inverted tab.
[0018] In some embodiments, the slider is provided with a limiting groove, and the push block is disposed in the limiting groove so that the push block can slide relative to the slider in the limiting groove along the core-pulling direction.
[0019] In some embodiments, the slider is provided with a molding surface for product molding.
[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0021] This invention utilizes the cooperation between the inclined ejector and the slider to drive the slider to move along the first inverted core-pulling direction while simultaneously driving the inclined ejector to move towards the second inverted core-pulling direction. This allows the first and second core-pulling components to move in two different directions, thus meeting the core-pulling requirements for injection molding of special inverted structures.
[0022] In this invention, the slider is cleverly used to drive the inclined top by the cooperation between the push block and the inclined top and the inclined top is set on the slider, so as to realize the relative movement between the slider and the inclined top. The first core pulling component and the second core pulling component are respectively set on the slider and the inclined top, so as to realize the core pulling action in two different directions. The structure is simple and there is no interference during the core pulling process. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the product and its inverted structure in an embodiment of this utility model.
[0025] Figure 2 This is a schematic diagram of the forming state of the sliding core-pulling mechanism in an embodiment of this utility model.
[0026] Figure 3 This is a schematic diagram of the sliding core-pulling mechanism in an embodiment of this utility model.
[0027] Figure 4 This is a schematic diagram of the inclined top being fitted into the limiting groove in the sliding core-pulling mechanism of this utility model embodiment.
[0028] Figure 5 This is a schematic diagram of the upper limit groove structure of the slider in the sliding core-pulling mechanism of this utility model embodiment.
[0029] Figure 6 This is a schematic diagram of the cooperation structure between the inclined top and the push block in the sliding core-pulling mechanism of this utility model embodiment.
[0030] Figure 7 This is a schematic diagram of the cooperation structure between the sliding component and the sliding groove in the sliding core-pulling mechanism of this utility model embodiment.
[0031] Figure 8 This is a schematic diagram of the inclined top structure in the sliding core-pulling mechanism of this utility model embodiment.
[0032] Figure 9 This is a schematic diagram of the limiting component structure in the sliding core-pulling mechanism of this utility model embodiment.
[0033] Figure 10 This is a schematic diagram of the injection mold structure according to an embodiment of the present utility model.
[0034] in:
[0035] 10. Dynamic template;
[0036] 20. Product; 21. Inverted structure; 211. First inverted snap; 212. Second inverted snap;
[0037] 31. Slider; 311. First core-pulling component; 312. Guide groove; 313. Limiting groove; 314. Forming surface; 32. Push block; 321. Sliding groove; 33. Angled top; 331. Sliding component; 332. Second core-pulling component; 333. Limiting groove; 34. Limiting block; 341. Limiting notch; 35. Limiting component; 351. Limiting protrusion. Detailed Implementation
[0038] 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.
[0039] Reference Figure 1 This is an injection-molded automotive part, product 20, which has an undercut structure 21. This undercut structure 21 includes a first undercut 211 and a second undercut 212. As shown in the figure, the core-pulling direction of the first undercut 211 is along the transverse direction of the product, while the core-pulling direction of the second undercut 212 is along the longitudinal direction of the product; that is, the core-pulling directions of the first and second undercuts are perpendicular to each other. Because the undercut structure requires core-pulling in two directions during molding, it presents significant challenges to the design of the core-pulling mechanism.
[0040] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments of this utility model, a sliding core-pulling mechanism is provided for use in Figure 1 The injection molding of the undercut structure of the product shown includes:
[0041] The slider 31 is capable of moving relative to the moving template 10 along the core-pulling direction of the first undercut. The slider 31 is provided with a first core-pulling component 311 for forming the first undercut.
[0042] Push block 32 is fixedly connected to moving template 10, so that when the slider moves, there can be relative movement between push block 32 and slider 21;
[0043] The inclined top 33 and the slider 31 are provided with a guide groove 312 that cooperates with the inclined top. The guide groove 312 is inclined relative to the movement direction of the slider. The push block 32 is provided with a sliding groove 321. The sliding groove 321 is arranged along the core-pulling direction of the second inverted button. One end of the inclined top 33 is provided with a slider 331, which is inserted into the sliding groove 321. The other end of the inclined top 33 is provided with a second core-pulling member 332 for forming the second inverted button.
[0044] The guide groove on the slider is inclined, meaning that the direction of the guide groove is at a certain angle to the direction of movement of the slider. Through the cooperation between the inclined top and the guide groove, a wedge-shaped cooperation is formed between the inclined top and the guide groove. When the slider moves in the direction of pulling the core of the first inverted buckle, due to the limiting effect of the push block on the inclined top, the inclined top moves in the direction of pulling the core of the second inverted buckle under the action of the wedge-shaped cooperation and the pushing action of the slider, so as to realize the simultaneous core pulling action of the first inverted buckle and the second inverted buckle.
[0045] By setting the push block and the sliding groove on the push block, the movable connection and limiting cooperation between the push block and the inclined top are realized, so that the inclined top can move relative to the slider in a different direction of motion under the joint action of the push block and the slider, thus realizing the core pulling action in two different directions.
[0046] The first core-pulling component 311 on the slider 31 is a protrusion structure, which mates with the end face of one end of the inclined top for forming the first undercut. The second core-pulling component 332 is a pin structure, which is used to form the retaining hole for the second undercut. The second core-pulling component is fixedly connected to the inclined top by screws. The first core-pulling component is arranged on the slider along the core-pulling direction of the first undercut, and the second core-pulling component is arranged on the inclined top along the core-pulling direction of the second undercut.
[0047] In some embodiments, a limiting block 34 is provided on the slider 31, and the limiting block 34 is disposed above the guide groove 312 to restrict the inclined pin from dislodging from the guide groove. By placing the limiting block on the open side of the guide groove, the open side of the guide groove is blocked, and the inclined pin is restricted within the guide groove, thereby preventing the inclined pin from dislodging from the guide groove.
[0048] A limiting notch 341 is provided on the limiting block 34 to cooperate with the slider. The limiting notch 341 and the slider 31 cooperate to limit the inclined top from being pulled out of the guide groove.
[0049] Reference Figure 2 The sliding core-pulling mechanism has two symmetrically arranged inclined tops 33 on the slider 31. The two inclined tops 33 are used for pulling the core of the two sets of inverted structures on the product.
[0050] In some embodiments, a limiting mechanism is provided between the inclined ejector and the slider. The limiting mechanism is used to restrict the movement of the inclined ejector on the slider. When the slider moves under the action of an external force, the limiting mechanism can release the restriction on the movement of the slider under the action of the slider, which can prevent the inclined ejector from moving during injection molding and limit the position of the inclined ejector after core pulling.
[0051] Reference Figure 8 and Figure 9 The limiting mechanism includes a limiting member 35 and an elastic reset member (not shown in the figure). The limiting member and the slider are in sliding engagement, so that the limiting member can move away from and towards the slider. The elastic reset member is disposed between the slider and the limiting member and is used to provide the limiting member with a force to move towards the slider.
[0052] The limiting member 35 is provided with a limiting protrusion 351, and the inclined top 33 is provided with two limiting grooves 333 that cooperate with the limiting protrusion, which are used to limit the inclined top at the positions of the two limiting grooves.
[0053] The elastic reset component can be a wave spring. When the slider is subjected to an external force, the force of the slider acts on the limiting protrusion of the limiting component. Through the interaction between the limiting protrusion and the limiting groove, the wave spring is compressed, causing the limiting protrusion to disengage from the limiting groove, and relative movement occurs between the inclined pusher and the slider. When there is no external force or the external force cannot overcome the force of the wave spring, the locking fit between the limiting protrusion and the limiting groove can achieve the limiting of the inclined pusher on the slider.
[0054] Along the sliding direction of the inclined top, the limiting protrusion 351 and the limiting groove 333 are provided with two wedge-shaped surfaces that are arranged opposite to each other. Through the cooperation between the wedge-shaped surfaces, the limiting protrusion can be disengaged from the limiting groove, and the inclined top can be provided with a stable limiting effect.
[0055] The limiting protrusion 351 and the limiting member can be configured to be rotatably connected, so that the limiting mechanism can adapt to the adaptive adjustment between the limiting protrusion and the limiting groove when the inclined top moves in the inclined direction.
[0056] On the other hand, some embodiments of this utility model also provide an injection mold, see reference. Figure 10 The injection mold includes a moving template 10 and a sliding core-pulling mechanism as described in the above embodiment, to achieve core pulling in two directions.
[0057] The injection mold includes a hydraulic cylinder (not shown in the figure), which drives the slider to move along the core-pulling direction of the first undercut. The slider and the moving platen are connected in a sliding fit along the core-pulling direction of the first undercut.
[0058] Reference Figure 3 and Figure 4A limiting groove 313 is provided on the slider 31, and the push block 32 is fitted within the limiting groove 313, allowing the push block to slide relative to the slider in the core-pulling direction within the limiting groove. Since the push block is fixedly connected to the moving template, the sliding engagement between the slider and the moving template is achieved through the engagement between the push block and the limiting groove.
[0059] A molding surface 314 for product molding is provided on the slider 31, so that the slider can be used for product injection molding at the same time. The molding surface is located on the side away from the first undercut core pulling direction to avoid interference when pulling the core along the first undercut core pulling direction.
[0060] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to 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.
[0061] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0062] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.
[0063] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A sliding core-pulling mechanism, characterized in that, For forming undercut structures on products, the undercut structure has a first undercut and a second undercut, and the core-pulling directions of the first undercut and the second undercut are perpendicular to each other; the sliding core-pulling mechanism includes: A slider is capable of moving relative to the moving template along the core-pulling direction of the first undercut, and the slider is provided with a first core-pulling component for forming the first undercut; A push block, which is fixedly connected to the moving template; The inclined top has a guide groove on the slider that cooperates with it. The guide groove is inclined relative to the direction of slider movement. The push block has a sliding groove that is arranged along the core-pulling direction of the second inverted button. One end of the inclined top has a sliding member that extends into the sliding groove. The other end of the inclined top has a second core-pulling member for forming the second inverted button.
2. The sliding core-pulling mechanism according to claim 1, characterized in that, The slider is provided with a limit block, which is located above the guide groove to prevent the inclined top from coming out of the guide groove.
3. The sliding core-pulling mechanism according to claim 2, characterized in that, The limiting block is provided with a limiting notch that cooperates with the slider. The limiting notch and the slider cooperate to prevent the inclined top from being pulled out of the guide groove.
4. The sliding core-pulling mechanism according to claim 1, characterized in that, A limiting mechanism is provided between the inclined top and the slider. The limiting mechanism is used to restrict the movement of the inclined top on the slider. When the slider moves under the action of an external force, the limiting mechanism can release the restriction on the movement of the slider under the action of the slider.
5. The sliding core-pulling mechanism according to claim 4, characterized in that, The limiting mechanism includes a limiting member and an elastic reset member. The limiting member is slidably engaged with the slider, allowing the limiting member to move away from and towards the slider. The elastic reset member is disposed between the slider and the limiting member, and is used to provide a force to the limiting member to move towards the slider. The limiting member is provided with a limiting protrusion, and the inclined top is provided with two limiting grooves that cooperate with the limiting protrusion, which are used to limit the inclined top at the positions of the two limiting grooves.
6. The sliding core-pulling mechanism according to claim 5, characterized in that, Along the sliding direction of the inclined top, the limiting protrusion and the limiting groove are provided with two wedge-shaped surfaces that are arranged opposite to each other.
7. An injection mold, characterized in that, It includes a moving template and a sliding core-pulling mechanism as described in any one of claims 1-6.
8. The injection mold according to claim 7, characterized in that, It also includes a hydraulic cylinder, which is used to drive the slider to move along the core-pulling direction of the first inverted buckle, and the slider and the moving template are slidably connected in the core-pulling direction of the first inverted buckle.
9. The injection mold according to claim 7 or 8, characterized in that, The slider is provided with a limiting groove, and the push block is fitted in the limiting groove so that the push block can slide relative to the slider in the limiting groove along the core-pulling direction.
10. The injection mold according to claim 7, characterized in that, The slider is provided with a forming surface for product forming.