Injection mold capable of realizing inclined track core pulling
By introducing a multi-tilting structure and elastic constraint mechanism into the injection mold, the problems of demolding difficulties and insufficient guiding accuracy of traditional injection molds on tilted and undercut products are solved, achieving precise tilting trajectory core pulling and improving product molding quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN WEISONG IND CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional injection molds suffer from problems such as difficulty in demolding, insufficient guiding accuracy, and bulky structure when dealing with products with tilted undercuts or bosses, making it difficult to meet the design requirements of miniaturized and precision molds.
Employing a multi-tilt structure and elastic constraint mechanism, the inclined trajectory core pulling is achieved by driving the sliding seat and the molding insert through the guide slider. The cooperation of the inclined guide groove and the T-shaped slide, combined with the potential energy release of the elastic element, ensures that the molding insert moves along the preset trajectory.
It achieves precise tilt trajectory core pulling, avoids product interference, improves product molding efficiency and quality, and adapts to the design requirements of miniaturized and precision molds.
Smart Images
Figure CN224145270U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold capable of achieving tilted trajectory core pulling. Background Technology
[0002] In the field of injection molding, products with tilted undercut features or lateral concave-convex structures require a side core-pulling mechanism for demolding. Traditional side core-pulling mechanisms mostly use horizontal guide structures, and their core-pulling trajectory is singular, making it difficult to meet the molding requirements of tilted products. Specific technical bottlenecks are as follows:
[0003] 1. Difficult demolding due to tilted features
[0004] When a product has tilted undercuts or bosses, the horizontally guided core-pulling mechanism cannot move along the tilt direction of the product. This can easily lead to interference between the product and the mold during the core-pulling process, causing surface scratches, deformation, or even demolding failure. For example, the angled snap-fit structure commonly found in automotive interior parts requires forced demolding using traditional horizontal core-pulling, which seriously affects the product qualification rate.
[0005] 2. Insufficient guiding accuracy leads to motion deviation.
[0006] Traditional single-slide or inclined guide post structures are prone to slider misalignment or jamming during inclined core pulling due to the lack of multi-directional constraints. For example, when the slider is driven to move along the inclined direction only by the inclined guide post, the slider is prone to swinging due to lateral forces, causing the core pulling trajectory to deviate from the design path and affecting the dimensional accuracy of the product.
[0007] In existing technologies, some solutions attempt to solve the problem of tilted core pulling by adding auxiliary guide blocks or complex linkage mechanisms, but these solutions have drawbacks such as bulky structure, high processing cost, and difficult maintenance, and are particularly difficult to adapt to the design requirements of miniaturized and precision molds.
[0008] Therefore, there is an urgent need for an injection mold that is compact, provides precise guidance, and can achieve core pulling along tilted trajectories to improve the molding efficiency and quality of tilted feature products. Utility Model Content
[0009] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0010] An injection mold capable of tilting trajectory core pulling includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper mold and the lower mold are connected so that the upper mold core and the lower mold core cooperate to form a mold cavity for molding a product. A sliding component is provided between the upper mold and the lower mold.
[0011] The sliding assembly includes a guide slider fixed to the upper mold, a sliding seat that can be slidably fitted into the lower mold, and a molding insert that can be slidably connected to the mold cavity. The guide slider drives the sliding seat and causes the molding insert to move laterally in the parting surface direction of the lower mold, thereby realizing the lateral core pulling action.
[0012] The slide seat has an inclined guide groove on the side away from the mold cavity and an inclined T-shaped slide groove on the side closer to the mold cavity. One side of the guide slider has an inclined pushing part that can slide into the inclined guide groove. One side of the molding insert has a T-shaped structure that can slide into the inclined T-shaped slide groove. The other side of the molding insert has a product contouring structure. The lower mold core has an inclined slide groove that matches the side of the molding insert corresponding to the product contouring structure. The product contouring structure docks with the mold cavity through the inclined slide groove. The slide seat also has a receiving groove on the side closer to the mold cavity, and an elastic element that abuts against the lower mold core or lower mold is provided in the receiving groove.
[0013] As a further embodiment of this utility model: a lateral sliding groove is provided on the parting surface of the lower mold, and stepped grooves are provided on both sides of the lateral sliding groove. A limiting block is fixedly provided in the stepped groove, and a limiting part protruding into the lateral sliding groove extends from the inner side of the limiting block.
[0014] The two sides of the slide seat extend outward to form protruding guide rails. The guide rails can slide in the lateral groove along the horizontal direction of the parting surface. The limiting part and the longitudinal side of the guide rail form a sliding fit to limit the longitudinal displacement of the slide seat in the lateral groove.
[0015] As a further embodiment of this utility model: the extension direction of the inclined slide groove of the lower mold core is staggered with the extension direction of the inclined T-shaped slide groove on the slide seat in space, and the angle determined by the staggered arrangement is adapted to the lateral movement trajectory of the molding insert.
[0016] As a further embodiment of this utility model: the elastic element is a spring, one end of the spring abuts against the bottom surface of the receiving groove, and the other end of the spring extends out of the receiving groove and abuts against the side of the lower mold core or the lower mold.
[0017] As a further embodiment of this utility model: the inclined guide groove on the position seat has two ends forming limiting stops, and the limiting stops correspond to the extension direction of the inclined T-shaped slide groove.
[0018] As a further embodiment of this utility model: a forming boss is provided on the side of the row seat facing the mold cavity, and the receiving groove is provided along the end face of the forming boss;
[0019] The inclined T-shaped groove is located on the side of the forming boss.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0021] The inclined guide groove and the inclined push part work together to achieve inclined drive. The inclined T-shaped slide and the inclined slide of the lower mold core form a double-track guide, which accurately controls the movement of the molding insert along the inclined trajectory, avoids interference with the product, and thus effectively realizes the core pulling of the inclined trajectory.
[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0024] Figure 1 This is a schematic diagram of the structure of this utility model;
[0025] Figure 2 This is a schematic diagram of the structure of the sliding component on the lower mold in this utility model;
[0026] Figure 3 This is an exploded structural diagram of the cooperation between the sliding component and the lower mold core in this utility model;
[0027] Figure 4 This is a schematic diagram of the structure of the row seat in this utility model.
[0028] The reference numerals and names in the figure are as follows:
[0029] 1. Upper mold; 2. Lower mold; 3. Lower mold core; 4. Guide slider; 5. Slide seat; 6. Molding insert; 7. Inclined guide groove; 8. Inclined T-shaped slide; 9. Inclined push part; 10. T-shaped structure; 11. Product contouring structure; 12. Inclined slide; 13. Receiving groove; 14. Side slide; 15. Step groove; 16. Limiting block; 17. Limiting part; 18. Guide rail; 19. Limiting stop; 20. Molding boss. Detailed Implementation
[0030] 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.
[0031] Please see Figure 1-4 In this embodiment of the present invention, an injection mold capable of achieving inclined trajectory core pulling includes an upper mold 1 and a lower mold 2. The upper mold 1 has an upper mold core 1 and the lower mold 2 has a lower mold core 3. The upper mold 1 and the lower mold 2 are connected so that the upper mold core 1 and the lower mold core 3 cooperate to form a mold cavity for molding a product. A sliding component is provided between the upper mold 1 and the lower mold 2.
[0032] The sliding assembly includes a guide slider 4 fixed to the upper mold 1, a sliding seat 5 slidably fitted into the lower mold 2, and a molding insert 6 slidably connected to the mold cavity. The guide slider 4 drives the sliding seat 5 and causes the molding insert 6 to move laterally in the parting surface direction of the lower mold 2 to achieve the lateral core pulling action.
[0033] The slide seat 5 has an inclined guide groove 7 on the side away from the mold cavity, and an inclined T-shaped slide groove 8 on the side closer to the mold cavity. The guide slider 4 has an inclined pushing part 9 that can slide and fit into the inclined guide groove 7 on one side. The molding insert 6 has a T-shaped structure 10 that can slide and fit into the inclined T-shaped slide groove 8 on one side. The molding insert 6 has a product contouring structure 11 on the other side. The lower mold core 3 has an inclined slide groove 12 that matches the side of the molding insert 6 corresponding to the product contouring structure 11. The product contouring structure 11 docks with the mold cavity through the inclined slide groove 12. The slide seat 5 also has a receiving groove 13 on the side closer to the mold cavity. An elastic element that abuts against the lower mold core 3 or the lower mold 2 is provided in the receiving groove 13.
[0034] In this utility model's technical solution, the injection mold uses a multi-tilting structure collaborative guiding and elastic constraint mechanism to transform the vertical movement of the upper mold 1 into the tilting trajectory movement of the molding insert 6. The specific principle is as follows:
[0035] The guide slider 4 is fixed to the upper mold 1, and its inclined pushing part 9 is slidably engaged with the inclined guide groove 7 of the slide seat 5. When the mold is opened, the upper mold 1 rises and drives the guide slider 4 to move. The inclined pushing part 9 applies an oblique driving force along the inclined guide groove 7, decomposing the vertical movement of the upper mold 1 into the lateral movement of the slide seat 5 along the parting surface of the lower mold 2.
[0036] The inclined T-shaped groove 8 of the slide seat 5 cooperates with the T-shaped structure 10 of the molding insert 6, restricting the lateral freedom of the molding insert 6 so that it can only slide along the direction of the inclined T-shaped groove 8. The product contour structure 11 of the molding insert 6 is embedded in the inclined groove 12 of the lower mold core 3. The extension direction of the inclined groove 12 is consistent with the demolding direction of the product's inclined undercut, forcing the molding insert 6 to pull the core along the preset inclined trajectory to avoid interference with the product.
[0037] The slide seat 5 has a built-in elastic element (such as a spring, not shown) in its receiving groove 13. One end of the elastic element abuts against the lower mold core 3, and the other end abuts against the bottom surface of the receiving groove 13. When the mold is closed, the elastic element is compressed and stores potential energy; when the mold is opened, the potential energy is released and pushes the slide seat 5 to reset, ensuring that the molding insert 6 returns to its precise position, while buffering the rigid impact between the guide slider 4 and the slide seat 5.
[0038] In this embodiment of the present invention, a lateral sliding groove 14 is provided on the parting surface of the lower mold 2, and a stepped groove 15 is provided on both sides of the lateral sliding groove 14. A limiting block 16 is fixedly provided in the stepped groove 15, and a limiting part 17 protruding into the lateral sliding groove 14 extends from the inner side of the limiting block 16.
[0039] The two sides of the row seat 5 extend outward to form protruding guide rails 18. The guide rails 18 can slide in the lateral slide groove 14 along the horizontal direction of the parting surface. The limiting part 17 forms a sliding fit with the longitudinal side of the guide rail 18 to limit the longitudinal displacement of the row seat 5 in the lateral slide groove 14.
[0040] The side groove 14 on the parting surface of the lower mold 2 and the guide rails 18 on both sides of the slide seat 5 form a sliding pair. The guide rails 18 slide along the length direction of the side groove 14 (usually horizontal), providing a horizontal reference guide for the slide seat 5. This guide direction forms a spatial angle difference with the driving direction of the inclined guide groove 7, ensuring that the slide seat 5 has a stable horizontal reference when tilting.
[0041] The limiting block 16 is fixed to both sides of the lateral slide groove 14 via the stepped groove 15, and the limiting part 17 extending inside it cooperates with the longitudinal side (the surface perpendicular to the sliding direction) of the guide rail 18. When the sliding seat 5 generates a component force perpendicular to the parting surface due to the tilting driving force, the limiting part 17 contacts the side of the guide rail 18, restricting the longitudinal movement of the sliding seat 5, so that the sliding seat 5 can only slide in the horizontal direction along the lateral slide groove 14.
[0042] When the inclined pushing part 9 of the guide slider 4 slides in the inclined guide groove 7, the resulting force can be decomposed into a horizontal component along the lateral slide groove 14 (driving the sliding seat 5) and a longitudinal component perpendicular to the parting surface. The limiting block 16 ensures that the effective component of the resultant force is fully used to drive the sliding seat 5 to move along the preset trajectory by limiting the displacement caused by the longitudinal component, thus avoiding energy loss and movement deviation.
[0043] In this embodiment of the utility model, the extension direction of the inclined slide groove 12 of the lower mold core 3 and the extension direction of the inclined T-shaped slide groove 8 on the slide seat 5 are staggered in space. The angle determined by this staggered arrangement is adapted to the lateral movement trajectory of the molding insert 6.
[0044] By setting the inclined slide groove 12 of the lower mold core 3 and the inclined T-shaped slide groove 8 on the slide seat 5 in a spatially staggered layout, the angle difference between the two provides two different directions of constraint guidance for the molding insert 6. One side of the molding insert 6 engages with the inclined T-shaped slide groove 8, and the other side engages with the inclined slide groove 12 of the lower mold core 3. During the mold opening process, when the slide seat 5 moves, the two slides apply forces to the molding insert 6 from different directions, making its actual movement trajectory a vector synthesis of the two constraint directions. This achieves an inclined trajectory movement that meets the product demolding requirements, accurately avoiding the product's undercut structure to complete the core pulling.
[0045] In this embodiment of the present invention, the elastic element is a spring, one end of the spring abuts against the bottom surface of the receiving groove 13, and the other end of the spring extends out of the receiving groove 13 and abuts against the side of the lower mold core 3 or the lower mold 2.
[0046] As an elastic element, the spring utilizes its compression-reset characteristics to achieve dynamic force balance and position calibration during mold opening and closing. That is, when the mold is closed, the elastic element is compressed and stores potential energy; when the mold is opened, the potential energy is released and pushes the slide seat 5 to reset, ensuring that the molding insert 6 returns to its precise position, while buffering the rigid impact between the guide slider 4 and the slide seat 5.
[0047] In this embodiment of the present invention, the inclined guide groove 7 on the row seat 5 has two ends forming limiting stops 19, and the limiting stops 19 correspond to the extension direction of the inclined T-shaped slide groove 8.
[0048] As a component of the inclined guide groove 7, the limiting stop 19 has physical boundaries at both ends so that the inclined pushing part 9 can slide in the inclined guide groove 7 within the limiting stop 19. By having the limiting stop 19 correspond to the extension direction of the inclined T-shaped slide groove 8, the limiting stop 19 can effectively prevent the molded insert 6 from continuing to slide after it has moved a certain distance, thereby further refining the stroke of the molded insert 6. Of course, this design can also serve as a preventive measure to prevent the molded insert 6 from moving excessively.
[0049] In this embodiment of the present invention, the row seat 5 is provided with a forming boss 20 protruding on the side facing the mold cavity, and the receiving groove 13 is provided along the end face of the forming boss 20.
[0050] The inclined T-shaped groove 8 is located on the side of the forming boss 20.
[0051] The slide seat 5 has a forming boss 20 protruding on the side facing the mold cavity. The receiving groove 13 is opened on the end face of the forming boss 20. The inclined T-shaped slide 8 is located on the side of the forming boss 20. This layout optimizes space utilization and makes the structure more compact and reasonable.
[0052] Demolding principle: When the mold opens, the upper mold 1 drives the guide slider 4 fixed on it to move upward. The inclined pushing part 9 of the guide slider 4 slides outward along the inclined guide groove 7 on the side of the slide seat 5 away from the mold cavity (away from the mold cavity direction). Since the inclined pushing part 9 and the inclined guide groove 7 have the same inclination angle, the vertical movement of the guide slider 4 is converted into the lateral movement of the slide seat 5, so that the slide seat 5 slides outward along the lateral slide groove 14 on the parting surface of the lower mold 2 through the guide rails 18 that extend outward on both sides; at the same time, the inclined T-shaped slide groove 8 on the side of the slide seat 5 near the mold cavity drives The molding insert 6 moves synchronously. The T-shaped structure 10 on one side of the molding insert 6 slides in the inclined T-shaped groove 8. Constrained by the inclination angle of the inclined T-shaped groove 8, the molding insert 6 moves laterally along the follower seat 5. The product contouring structure 11 on the other side slides synchronously along the inclined groove 12 opened in the lower mold core 3. The extension directions of the inclined T-shaped groove 8 and the inclined groove 12 are staggered in space. The staggered angle of the two makes the molding insert 6 finally form a composite inclined motion trajectory that matches the product's inclined characteristics, thereby completing the lateral core pulling action of the inclined trajectory.
[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. An injection mold capable of achieving a tilt trajectory core pulling, characterized by, It includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper mold and the lower mold are connected so that the upper mold core and the lower mold core cooperate to form a mold cavity for molding products. A sliding component is provided between the upper mold and the lower mold. The sliding assembly includes a guide slider fixed to the upper mold, a sliding seat that can be slidably fitted into the lower mold, and a molding insert that can be slidably connected to the mold cavity. The guide slider drives the sliding seat and causes the molding insert to move laterally in the parting surface direction of the lower mold, thereby realizing the lateral core pulling action. The slide seat has an inclined guide groove on the side away from the mold cavity and an inclined T-shaped slide groove on the side closer to the mold cavity. One side of the guide slider has an inclined pushing part that can slide into the inclined guide groove. One side of the molding insert has a T-shaped structure that can slide into the inclined T-shaped slide groove. The other side of the molding insert has a product contouring structure. The lower mold core has an inclined slide groove that matches the side of the molding insert corresponding to the product contouring structure. The product contouring structure docks with the mold cavity through the inclined slide groove. The slide seat also has a receiving groove on the side closer to the mold cavity, and an elastic element that abuts against the lower mold core or lower mold is provided in the receiving groove.
2. An injection mold capable of achieving a tilt trajectory core pulling according to claim 1, characterized in that, A lateral sliding groove is provided on the parting surface of the lower mold. Step grooves are provided on both sides of the lateral sliding groove. A limiting block is fixed in the step groove. A limiting part protruding into the lateral sliding groove extends from the inner side of the limiting block. The two sides of the slide seat extend outward to form protruding guide rails. The guide rails can slide in the lateral groove along the horizontal direction of the parting surface. The limiting part and the longitudinal side of the guide rail form a sliding fit to limit the longitudinal displacement of the slide seat in the lateral groove.
3. An injection mold capable of achieving a tilt trajectory core pulling according to claim 1, characterized in that, The extension direction of the inclined groove of the lower mold core is staggered with the extension direction of the inclined T-shaped groove on the slide seat in space. The angle determined by this staggered arrangement is adapted to the lateral movement trajectory of the molding insert.
4. An injection mold capable of achieving a tilt trajectory core pulling according to claim 1, wherein, The elastic element is a spring, one end of which abuts against the bottom surface of the receiving groove, and the other end of which extends out of the receiving groove and abuts against the side of the lower mold core or the lower mold.
5. An injection mold capable of achieving a tilted trajectory core pulling according to claim 1, wherein, The inclined guide groove on the row seat has two ends forming limiting stops, and the limiting stops correspond to the extension direction of the inclined T-shaped slide groove.
6. An injection mold capable of achieving a tilt trajectory core pulling according to claim 1, wherein, The row seat has a forming boss protruding on the side facing the mold cavity, and the receiving groove is formed along the end face of the forming boss; The inclined T-shaped groove is located on the side of the forming boss.