A row bit needle structure
By introducing elastic elements into the sliding structure, the warping and tearing problems caused by stress concentration in the traditional sliding structure are solved, enabling efficient demolding of complex structure products, improving product qualification rate and reducing mold maintenance costs.
Patent Information
- Application Number
- CN202521788976.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-21
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-21
AI Technical Summary
In traditional sliding structures, the molding inserts are rigidly connected to the sliding seat, which leads to stress concentration when processing complex cavity products, causing defects such as warping and tearing. In particular, the yield rate of thin-walled and transparent parts is low, and the mold maintenance cost is high.
The molding insert and the slide seat are connected by elastic elements. The movable plate is pushed to slide by the elastic elements to realize the pre-core pulling function of the molding insert, thereby reducing friction and stress concentration during the core pulling process.
It effectively reduces product defects during the core-pulling process, improves the pass rate of complex structure products, and reduces mold maintenance costs.
Smart Images
Figure CN224675319U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to a sliding spring pin structure. Background Technology
[0002] In modern mold manufacturing, sliding structures are widely used as a core component for molding products with complex cavities, undercuts, or concave-convex structures. They achieve lateral core pulling and repositioning during mold opening and closing by driving the sliding seat with inclined guide pillars, thus ensuring smooth product demolding and maintaining molding accuracy. However, as industrial products increasingly demand higher structural complexity, surface quality, and molding efficiency, traditional sliding structures are gradually revealing their insufficient adaptability.
[0003] In traditional sliding door structures, the molding insert is typically rigidly connected to the sliding door seat, and its position remains fixed during core pulling and resetting. When machining products with localized minor protrusions, deep cavities with undercuts, or requiring secondary molding, the rigidly connected molding insert can easily cause stress concentration during demolding, leading to defects such as warping, tearing, or even breakage. This problem is particularly pronounced for thin-walled parts, transparent parts, or products made of high-strength materials, not only reducing product yield but also increasing mold maintenance costs and production cycles.
[0004] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content
[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0006] A sliding spring structure includes a sliding seat, an inclined guide post slidably connected to the upper side of the sliding seat, a molded insert plate fixedly connected to the front side of the sliding seat, a sealing plate fixedly connected to the rear side of the sliding seat, an installation groove inside the sliding seat, and the sealing plate located at the opening of the installation groove of the sliding seat, wherein a movable plate is slidably connected inside the installation groove. The front side of the movable plate is connected to an elastic element, the front side of the elastic element abuts against the inner wall of the molding insert plate, the front side of the movable plate is also connected to a molding insert, the front side of the molding insert and the front side of the molding insert plate are respectively provided with a first product contouring part and a second product contouring part that mate with the mold cavity, and the molding insert plate is provided with a first through groove that allows the first product contouring part to pass through. The rear side of the movable plate is connected to an abutment, and the sealing plate has a second through groove that allows the abutment to pass through. Under the action of the elastic element, at least part of the rear side of the abutment is exposed outside the second through groove to form an abutment end.
[0007] As a further embodiment of this utility model: the movable plate includes a front plate and a rear plate interlocked by screws, a first mounting groove is formed between the front plate and the rear plate, and a first mounting end adapted to the first mounting groove is provided on the rear side of the molded insert. The first mounting end of the molded insert is fixed in the first mounting groove by the interlocking of the front plate and the rear plate.
[0008] As a further embodiment of this utility model: a second mounting groove is formed between the front plate and the rear plate, and a second mounting end adapted to the second mounting groove is provided on the front side of the abutment member. The second mounting end of the abutment member is fixed in the second mounting groove by the interlocking of the front plate and the rear plate.
[0009] As a further embodiment of this utility model: a third mounting groove is provided on the front surface of the front plate, and the rear side of the elastic element is embedded in the third mounting groove.
[0010] As a further embodiment of this utility model: a guide post is connected between the movable plate and the molded insert plate, and the movable plate can slide along the guide post.
[0011] As a further embodiment of this utility model: a stepped groove is recessed on the rear side of the mounting slot corresponding to the row seat, and a stepped portion adapted to the stepped groove is provided at the bottom of the sealing plate.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In traditional sliding structures, the molded insert is rigidly connected to the sliding seat. During core pulling, stress concentration can easily lead to warping and tearing of thin-walled or transparent parts. This structure uses an elastic element to give the molded insert a pre-core pulling function. When the mold opens, the elastic element pushes the movable plate to slide backward, causing the molded insert to retreat and detach from the product surface before the sliding seat as a whole, significantly reducing friction and stress concentration during the core pulling process. This design is specifically for products with localized minor protrusions and deep cavities with undercuts, effectively reducing product defects caused by traditional rigid core pulling and improving the yield rate of complex structure products.
[0013] 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
[0014] 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.
[0015] Figure 1This is a structural schematic diagram from one perspective of the present invention; Figure 2 This is a structural schematic diagram from another perspective of this utility model; Figure 3 This is a cross-sectional structural schematic diagram of this utility model from one perspective; Figure 4 This is a cross-sectional structural schematic diagram from another perspective of this utility model; Figure 5 This is a schematic diagram of the structure of the row seat in this utility model.
[0016] The reference numerals and names in the figure are as follows: 1. Position seat; 2. Inclined guide post; 3. Molded insert plate; 4. Sealing plate; 5. Mounting groove; 6. Movable plate; 7. Elastic element; 8. Molded insert; 9. First product contouring part; 10. Second product contouring part; 11. First through groove; 12. Abutting part; 13. Second through groove; 14. Abutting end; 15. Front plate; 16. Rear plate; 17. First mounting groove; 18. First mounting end; 19. Second mounting groove; 20. Second mounting end; 21. Third mounting groove; 22. Guide post; 23. Step groove. 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 1-5In this embodiment of the utility model, a sliding spring structure is provided, in which a sliding seat 1 is provided as the basic load-bearing component of the entire structure. A sliding groove adapted to an inclined guide post 2 is machined on the upper side of the sliding seat 1. The inclined guide post 2 passes through the sliding groove and forms a sliding connection with the sliding seat 1. When the inclined guide post 2 moves in an inclined direction under the action of an external driving force, it can drive the sliding seat 1 to reciprocate in the horizontal direction through sliding engagement. A molded insert plate 3 is fixedly connected to the front side of the sliding seat 1 by screws, and a sealing plate 4 is also fixedly connected to the rear side by screws to form a closed assembly space. An installation groove 5 is provided through the interior of the sliding seat 1 in the front-to-back direction. The surface size of the sealing plate 4 is adapted to the opening size of the installation groove 5 to cover the rear opening of the installation groove 5, thus protecting the internal structure of the installation groove 5. To improve the connection accuracy between the sealing plate 4 and the mounting seat 1, the mounting seat 1 has a stepped groove 23 recessed on the rear edge of the mounting groove 5. The bottom edge of the sealing plate 4 is integrally formed with a stepped part that matches the stepped groove 23. During assembly, the stepped part is embedded in the stepped groove 23 to achieve the pre-positioning of the sealing plate 4.
[0019] A movable plate 6 is provided within the mounting groove 5. The outer wall of the movable plate 6 is clearance-fitted with the inner wall of the mounting groove 5, allowing the movable plate 6 to slide freely along the axial direction of the mounting groove 5. The movable plate 6 consists of a front plate 15 and a rear plate 16. Screw holes are provided at corresponding positions on the front plate 15 and the rear plate 16, and the two are interlocked and fixed by screws passing through the screw holes. An assembly space is reserved between the opposite surfaces of the front plate 15 and the rear plate 16, with a first mounting groove 17 formed near the front and a second mounting groove 19 formed near the rear.
[0020] A molding insert 8 is connected to the front side of the movable plate 6. A first mounting end 18 is integrally formed on the rear side of the molding insert 8. The outer dimensions of the first mounting end 18 are adapted to the inner cavity dimensions of the first mounting groove 17. During assembly, the first mounting end 18 of the molding insert 8 is inserted into the first mounting groove 17, and then fixed by the interlocking of the front plate 15 and the rear plate 16, so that the first mounting end 18 is clamped in the first mounting groove 17, realizing a rigid connection between the molding insert 8 and the movable plate 6. A first product contouring part 9 is machined on the front side of the molding insert 8. The shape of the first product contouring part 9 matches the shape of the part of the product to be molded. A second product contouring part 10 is machined at the corresponding position on the front side of the molding insert plate 3. The second product contouring part 10 and the first product contouring part 9 together form the cavity contour required for product molding. A first through groove 11 is provided on the molding insert plate 3 at the position corresponding to the first product contouring part 9, so that when the molding insert 8 moves with the movable plate 6, the first product contouring part 9 can smoothly pass through the first through groove 11 and extend into the mold cavity.
[0021] An elastic element 7 is also connected to the front side of the movable plate 6. In this embodiment, the elastic element 7 is a cylindrical helical spring. A third mounting groove 21 is provided on the front surface of the front plate 15 corresponding to the position of the elastic element 7. The inner diameter of the third mounting groove 21 is adapted to the outer diameter of the elastic element 7. The rear end of the elastic element 7 is embedded in the third mounting groove 21 for positioning, while the front end of the elastic element 7 abuts against the inner wall of the molded insert plate 3.
[0022] A retaining member 12 is connected to the rear side of the movable plate 6. The retaining member 12 has a cylindrical structure, and its front side is integrally formed with a second mounting end 20. The outer dimensions of the second mounting end 20 are adapted to the inner cavity dimensions of the second mounting groove 19. During assembly, the second mounting end 20 of the retaining member 12 is embedded into the second mounting groove 19, and the retaining member 12 is connected to the movable plate 6 by the interlocking of the front plate 15 and the rear plate 16. A second through groove 13 is provided on the sealing plate 4 at the position corresponding to the retaining member 12, so that the retaining member 12 can slide freely along the second through groove 13. Under the thrust of the elastic element 7, the movable plate 6 always has a tendency to move, driving the retaining member 12 to move synchronously. At this time, at least part of the length of the rear end of the retaining member 12 is exposed outside the second through groove 13, forming a retaining end 14 for contact with the external structure.
[0023] To ensure the stability of the sliding process of the movable plate 6, a guide post 22 is connected between the movable plate 6 and the molded insert plate 3. One end of the guide post 22 is fixed to the inner wall of the molded insert plate 3 by screws, and the other end extends axially and passes through the guide hole opened at the corresponding position of the movable plate 6. The guide post 22 and the guide hole are fitted with a clearance fit, so that the movable plate 6 can slide smoothly along the axial direction of the guide post 22 and avoid deviation or jamming during the movement.
[0024] The working process of this structure is as follows: During the mold closing stage, the outer template contacts the abutment end 14 of the abutment member 12 and applies forward pressure. This pressure overcomes the elastic force of the elastic element 7 and pushes the movable plate 6 forward. At this time, the molding insert 8 moves forward with the movable plate 6. The first product contouring part 9 passes through the first through groove 11 and corresponds to the second product contouring part 10, together forming a mold cavity for product molding. During the mold opening stage, the outer template gradually separates from the abutment end 14, and the outer template separates from the abutment end 14 of the abutment member 12. The elastic force of the elastic element 7 pushes the movable plate 6 to slide backward, causing the molding insert 8 to move backward synchronously. This allows the first product contouring part 9 to perform the core-pulling action before the slide seat 1 as a whole, reducing the friction between the product and the molding insert 8. Subsequently, the inclined guide post 2 drives the slide seat 1 to slide backward as a whole, completing the overall core-pulling process and achieving smooth demolding of the product.
[0025] In summary, in traditional sliding structures, the molded insert 8 is rigidly connected to the sliding seat 1. During core pulling, stress concentration can easily lead to warping and tearing of thin-walled or transparent parts. This structure, through the elastic element 7, enables the molded insert 8 to have a pre-core pulling function. When the mold opens, the elastic element 7 pushes the movable plate 6 to slide backward, causing the molded insert 8 to retreat and detach from the product surface before the sliding seat 1 as a whole, significantly reducing friction and stress concentration during the core pulling process. This design is specifically for products with localized minor protrusions and deep cavities with undercuts, effectively reducing product defects caused by traditional rigid core pulling and improving the pass rate of complex structure products.
[0026] 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. A sliding spring pin structure, characterized in that, The device includes a row seat, an inclined guide post slidably connected to the upper side of the row seat, a molded insert plate fixedly connected to the front side of the row seat, a sealing plate fixedly connected to the rear side of the row seat, an installation groove inside the row seat, and the sealing plate located at the opening of the installation groove of the row seat. A movable plate is slidably connected inside the installation groove. The front side of the movable plate is connected to an elastic element, the front side of the elastic element abuts against the inner wall of the molding insert plate, the front side of the movable plate is also connected to a molding insert, the front side of the molding insert and the front side of the molding insert plate are respectively provided with a first product contouring part and a second product contouring part that mate with the mold cavity, and the molding insert plate is provided with a first through groove that allows the first product contouring part to pass through. The rear side of the movable plate is connected to an abutment, and the sealing plate has a second through groove that allows the abutment to pass through. Under the action of the elastic element, at least part of the rear side of the abutment is exposed outside the second through groove to form an abutment end.
2. The sliding spring pin structure according to claim 1, characterized in that, The movable plate includes a front plate and a rear plate interlocked by screws, and a first mounting groove is formed between the front plate and the rear plate. The rear side of the molded insert is provided with a first mounting end adapted to the first mounting groove. The first mounting end of the molded insert is fixed in the first mounting groove by the interlocking of the front plate and the rear plate.
3. The sliding spring pin structure according to claim 2, characterized in that, A second mounting groove is formed between the front plate and the rear plate. The front side of the abutment is provided with a second mounting end that is adapted to the second mounting groove. The second mounting end of the abutment is fixed in the second mounting groove by the interlocking of the front plate and the rear plate.
4. The sliding spring pin structure according to claim 2, characterized in that, The front surface of the front plate is provided with a third mounting groove, and the rear side of the elastic element is embedded in the third mounting groove.
5. A positioning spring pin structure according to any one of claims 1-4, characterized in that, A guide post connects the movable plate and the molded insert plate, and the movable plate can slide along the guide post.
6. The sliding spring pin structure according to claim 1, characterized in that, The rear side of the mounting slot corresponding to the row seat is recessed to form a stepped groove, and the bottom of the sealing plate is provided with a stepped part adapted to the stepped groove.