Inclined guide pillar sliding block inward shrinkage core-pulling structure
By using inclined guide pillars to drive the slider and a side-pulling core-pulling structure, the problems of complex inner undercut structures, large space occupation, and inconvenient disassembly and assembly in plastic molds are solved, thus simplifying the mold and reducing costs.
Patent Information
- Application Number
- CN202520484748.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing plastic mold products have problems such as complex and space-consuming undercut structures with two different directions on the inside, inconvenient disassembly and assembly, and high cost.
The internal core-pulling structure, which uses inclined guide pillars to drive the slider and side core-pulling, achieves simplified core-pulling of the mold by using the combined action of the inclined guide pillars and springs to make the slider move horizontally backward and the side core-pulling moves horizontally inward under the action of the inclined pulling surface on the slider.
This results in a mold with a simple structure, small footprint, easy assembly and disassembly, and low cost, improving production stability and maintenance convenience, and reducing mold costs.
Smart Images
Figure CN223864226U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive injection molds, specifically relating to a core-pulling structure with an inclined guide post slider. Background Technology
[0002] For plastic molded products with two undercuts in different directions on the inside, a sliding block type bidirectional angled ejector core pulling method is currently commonly used. For example... Figure 1 As shown, due to the limitations of the product characteristics and the requirement for a relatively large inner hole for installation, this type of structure is complex, occupies a large mold space, is inconvenient to disassemble and assemble, is prone to damage, and has a relatively high mold cost. Currently, there is an urgent need for a solution that is structurally stable, easy to disassemble and assemble, produces high-quality products, and is relatively inexpensive. Utility Model Content
[0003] To address the aforementioned problems in the existing technology, this utility model provides an inward core-pulling structure with an inclined guide post and slider. This inward core-pulling structure is achieved through a mechanical means of driving the slider with an inclined guide post, resulting in a small footprint and structural stability.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a slanted guide post slider inward core-pulling structure, comprising a slanted guide post, a slider, lateral core-pulling, pressure strip, limiting block, and spring. Slanted grooves are formed on both sides of the front of the slider, and both slanted grooves slope from back to front towards the middle of the slider. Two lateral core-pulling structures are symmetrically arranged, with one side installed at a slanted groove on the slider, and the other side of the lateral core-pulling structure located below the front side of the slider and protruding outside the front side of the slider. Pressure strips are set on the upper sides of both sides of the slider, with the front of the pressure strip pressing the other side of the lateral core-pulling structure below. The upper end of the slanted guide post slopes forward and penetrates through the middle of the slider. The limiting block is located behind the slider. The spring is fixed in the middle of the lower side of the front end of the slider. When the mold opens, the slanted guide post drives the slider to retract backward while the two lateral core-pulling structures perform a horizontal lateral inward pulling motion until the slider is blocked by the limiting block, at which point the slider and the two lateral core-pulling structures stop moving.
[0005] Furthermore, the two inner sides of the two inclined grooves form an inclined surface, and the two outer sides form an inclined drawing surface. The inclined surface on one side of the inclined groove has the same inclination angle as the inclined drawing surface. The two sides of the slider are provided with a protrusion. The height of the protrusion is lower than that of the middle of the slider. A groove is opened on the lower front side of the protrusion. An inclined hole adapted to the inclined guide post is opened in the middle of the slider.
[0006] Furthermore, the side of the lateral core puller is set as a second inclined surface that matches the first inclined surface. A convex shaft is provided on one side of the front end of the lateral core puller. A second protrusion that matches the first groove is provided on the lower rear side of the lateral core puller. An inclined groove that matches the front part of the first protrusion is opened above the second protrusion on the lateral core puller.
[0007] Furthermore, a protrusion is provided at the bottom of one side of the pressure strip, and a groove is provided at one end of the pressure strip to match the second protrusion.
[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a slanted guide post and a spring to jointly drive the slider, so that the slider moves backward horizontally. At the same time, the lateral core puller moves inward horizontally under the action of the slanted pulling surface on the slider, thereby causing the lateral core puller to disengage from the undercut on the product. This solves the problem of not needing to design a complex slider-type bidirectional slanted core puller structure for the mold. Moreover, this mechanical form is easy to install, has a simple and stable structure, solves the problem of production stability, and makes maintenance more convenient. This utility model occupies little space, is easy to disassemble and assemble, and has low mold cost. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the existing technology structure;
[0010] Figure 2 This is a schematic diagram of the structure when the present invention is installed on a product;
[0011] Figure 3 This is an exploded view of the present utility model and the product;
[0012] Figure 4 This is a schematic diagram of the structure when the lateral core-pulling mechanism of this utility model is installed on the product;
[0013] Figure 5 This is a schematic diagram of the structure of the present invention when the side core puller and the slider are installed on the product;
[0014] Figure 6 This is a schematic diagram of the structure of the product when the inverted clip is removed;
[0015] Figure 7 This is a bottom view of the product when the inverted tab is removed;
[0016] Figure 8 for Figure 7 Enlarged view of point A in the middle. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1In existing technologies, for plastic mold products 1, there are two undercuts 11 in different directions on the inner side. Although the two undercuts 11 are in different directions, they are on the same straight line. Currently, two angled ejectors 8 are commonly used in conjunction with slider 1 9 and slider 2 10 to complete the undercuts 11 in different directions on the inner side. This results in a complex mold structure, occupies a large mold space, is inconvenient to disassemble and assemble, is prone to damage, and has a relatively high mold cost. There is an urgent need for a solution that is structurally stable, easy to disassemble and assemble, produces high-quality products, and is relatively inexpensive.
[0019] Please see Figure 2-8 This utility model provides the following technical solution: a slanted guide post slider inward core-pulling structure, including a slanted guide post 2, a slider 3, lateral core-pulling 4, a pressure strip 5, a limiting block 6, and a spring 7. Slanted grooves 31 are opened on both sides of the front part of the slider 3. Both slanted grooves 31 are inclined from back to front towards the middle of the slider 3. Two lateral core-pulling 4s are symmetrically arranged, with one side installed in the slanted groove 31 of the slider 3. The two lateral core-pulling 4s are symmetrically arranged in the two slanted grooves 31 on the slider 3, and then the lateral core-pulling... The outer front end of 4 contacts the undercut 11 on product 1. The front ends of the two lateral pull cores 4 and the front end of the slider 3 are initially flush. The other side of the lateral pull core 4 is located below the front side of the slider 3 and protrudes outside the front side of the slider 3. The pressure strip 5 is set on the two sides of the slider 3, and the front part of the pressure strip 5 presses the other side of the lateral pull core 4 down. The outer side of the pressure strip 5 presses the other side of the lateral pull core 4 down. This is to prevent the lateral pull core 4 from moving backward, but the pressure strip 5 does not prevent the slider 3 from moving backward. The upper end of the inclined guide post 2 is tilted forward and passes through the middle of the slider 3. When the inclined guide post 2 moves vertically upward, it will push the slider 3 to move backward. However, the lateral core puller 4 is blocked by the pressure strip 5 and will not be driven to move backward. Since the inclined grooves 31 on both sides of the front of the slider 3 are inclined towards the middle of the slider 3, when the slider 3 moves backward, the lateral core pullers 4 on both sides will be pushed horizontally towards the middle of the slider 3 by the two sides of the slider 3. During this process, the lateral core pullers 4 are always in contact with the two sides of the inclined grooves 31 on the slider 3. 6 is located behind slider 3. After slider 3 moves backward a certain distance, it will be blocked by limit block 6. Spring 7 is fixed in the middle of the lower front end of slider 3. When spring 7 is initially installed, it is compressed by the mold. When the mold opens, spring 7 has the force to push slider 3 backward. At the same time, the inclined guide post 2 is driven to move upward, so the inclined guide post 2 also drives slider 3 to move backward. At the same time, the two side core pullers 4 perform horizontal side-to-side inward movement until slider 3 is blocked by limit block 6. Slider 3 and the two side core pullers 4 stop moving.
[0020] Specifically, at the two inclined grooves 31, the two inner sides form inclined surfaces 32 and the two outer sides form inclined drawing surfaces 35. The inclined surfaces 32 and 35 on one side of the inclined groove 31 have the same inclination angle, which is 8°. The slider 3 has protrusions 34 on both sides. The inclined drawing surface 35 is the side of the front part of the protrusion 34. Therefore, the front part of the protrusion 34 is inclined from back to front towards the middle of the slider 3. The outer side of the protrusion 34 is flat and has no inclination. The height of the protrusion 34 is lower than the middle of the slider 3. The lower front part of the protrusion 34 has a groove 33. The middle of the slider 3 has an inclined hole 36 that matches the inclined guide post 2. The inclined guide post 2 passes through the inclined hole 36.
[0021] Specifically, one side of the side pull core 4 is set as a second inclined surface 43 that matches the first inclined surface 32. The inclination angle of the second inclined surface 43 is also 8°. A convex shaft 41 is set on one side of the front end of the side pull core 4. The convex shaft 41 is inserted into the inverted buckle 11 in the product 1. A second protrusion 44 that matches the first groove 33 is set on the lower rear side of the side pull core 4. A second inclined groove 45 that matches the front part of the first protrusion 34 is opened above the second protrusion 44 on the side pull core 4. The inclination angle of the second inclined groove 45 is also 8°. After one side of the side pull core 4 is installed in the first inclined groove 31, the first inclined surface 32 and the second inclined surface 43 are in close contact. The front side of the first protrusion 34 is inserted into the second inclined groove 45. The second protrusion 44 passes through the first groove 33 below the front part of the first protrusion 34.
[0022] Specifically, a protrusion 52 is provided on the bottom side of one side of the pressure strip 5. The protrusion 52 presses on the outer side of the first protrusion 34. The pressure strip 5 only limits the vertical position of the slider 3, without blocking the slider 3 from moving back and forth. A groove 2 51 is opened at one end of the pressure strip 5 to match the second protrusion 44. The outer side of the second protrusion 44 is located in the groove 2 51. Since the pressure strip 5 is fixed, the pressure strip 5 limits the vertical position of the second protrusion 44, without blocking the lateral movement of the lateral core puller 4.
[0023] The installation and movement process of this utility model is as follows: First, the two side core pullers 4 are inserted obliquely into the inclined grooves 31 on both sides of the slider 3 through internal movement. At this time, the two side core pullers 4 are symmetrical. The spring 7 is inserted into the middle of the lower front end of the slider 3. Then, the protrusion 52 on the pressure strip 5 contacts the outer side of the protrusion 34 on both sides of the slider 3 and the protrusion 44 is set in the groove 51. Then, the whole assembly is fixed in the rear mold by the screw of the pressure strip 5. At this time, the spring 7 is compressed. Next, the limiting block 6 is also fixed to the rear mold. Finally, the inclined guide post 2 passes through the inclined hole 36 in the middle of the slider 3 and the inclined guide post 3 is inserted into the front mold. This completes the assembly. Motion Analysis: When the mold opens, i.e., moves vertically upwards, the inclined guide post 2, being fixed to the front mold, moves upwards along with it. At this time, the slider 3, driven by the inclined guide post 2 and the spring 7, moves horizontally backwards. Because the inner front part of the protrusion 34 on both sides of the slider 3 is inclined from back to front towards the middle of the slider 3, and the inner front part of the protrusion 34 is an inclined drawing surface 35, the inclined drawing surface 35 is inclined at 8° towards the middle, and the inclined drawing surface 35 is in close contact with the side of the inclined groove 45 on the side core puller 4, the backward movement of the slider 3 causes the inclined drawing surface 45 to move horizontally backwards. As surface 35 moves backward, the inclined surfaces 35 on both sides push the lateral core pullers 4 on both sides to move laterally towards the center of slider 3. During this process, the two sides of the inclined grooves 32 on both sides of slider 3 remain in close contact with the lateral core pullers 4. When slider 3 continues to move a certain distance, slider 3 is limited by the rear limiting block 6, and slider 3 and the lateral core pullers 4 on both sides stop moving. At this time, the lateral core pullers 4 on both sides move 1.8mm towards the center, and the protruding shaft 41 exits from the undercut 11 in product 1. This utility model has a simple structure, few parts, occupies little mold space, is easy to disassemble and assemble, and is not easily damaged.
[0024] When there are two inverted clips 11 in different directions on the inner side of product 1, this utility model can solve the problems of complex mold and high requirements for product mounting holes, avoid waste of mold production and manufacturing costs, and avoid expensive costs such as mold modification in the later stage.
[0025] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A slanted guide post and slider inward core-pulling structure, comprising a slanted guide post (2), a slider (3), a lateral core-pulling mechanism (4), a pressure bar (5), a limiting block (6), and a spring (7), characterized in that, The slider (3) has inclined grooves (31) on both sides of its front part. Both inclined grooves (31) are inclined from back to front towards the middle of the slider (3). The lateral core pullers (4) are set as two symmetrical ones, with one side installed at the inclined groove (31) of the slider (3). The other side of the lateral core pullers (4) is located below the front side of the slider (3) and protrudes outside the front side of the slider (3). The pressure strips (5) are set on the two sides of the slider (3) and the front of the pressure strips (5) will pull the lateral core pullers. The other side of the core (4) is pressed down. The upper end of the inclined guide post (2) is tilted forward and passes through the middle of the slider (3). The limiting block (6) is located behind the slider (3). The spring (7) is fixed in the middle of the lower side of the front end of the slider (3). When the mold is opened, the inclined guide post (2) drives the slider (3) to move backward while the two lateral core pullers (4) make horizontal lateral inward movement until the slider (3) is blocked by the limiting block (6). The slider (3) and the two lateral core pullers (4) stop moving.
2. The inclined guide post slider inward core-pulling structure according to claim 1, characterized in that, Two inclined surfaces (32) are formed on the inner sides of the two inclined grooves (31), and inclined surfaces (35) are formed on the outer sides. The inclined surfaces (32) and inclined surfaces (35) on one side of the inclined groove (31) have the same inclination angle. The slider (3) is provided with protrusions (34) on both sides. The height of the protrusions (34) is lower than that of the middle of the slider (3). The lower front side of the protrusions (34) is provided with a groove (33). The middle of the slider (3) is provided with an inclined hole (36) that matches the inclined guide post (2).
3. The inclined guide post slider inward core-pulling structure according to claim 2, characterized in that, The side of the lateral core puller (4) is configured with a second inclined surface (43) that matches the first inclined surface (32). A convex shaft (41) is provided on one side of the front end of the lateral core puller (4). A second protrusion (44) that matches the first groove (33) is provided on the lower rear side of the lateral core puller (4). A second inclined groove (45) that matches the front part of the first protrusion (34) is opened above the second protrusion (44) on the lateral core puller (4).
4. The inclined guide post slider inward core-pulling structure according to claim 3, characterized in that, A protrusion (52) is provided on the bottom side of the pressure strip (5), and a groove (51) is provided on one end of the pressure strip (5) to match the protrusion (44).