Core-pulling injection mold capable of preventing slide from retreating
By using the combination of limit blocks and abutment blocks, the problem of backward displacement of the slide seat in injection molds was solved, thereby improving product quality and controlling costs.
Patent Information
- Application Number
- CN202520116616.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing injection molds are prone to displacement of the slide seat during injection, resulting in quality problems such as burrs and flash on the product. Furthermore, adopting a larger hydraulic cylinder solution is costly.
Design a core-pulling injection mold with anti-retrograde sliding mechanism. By using a limiting block and abutment block, the sliding of the slide seat is restricted to prevent backward displacement. The restriction is released when the mold is opened to achieve core pulling and demolding.
It effectively prevents defects such as burrs and rough edges from forming on products, improves product yield, reduces equipment costs, and ensures the normal use of molds.
Smart Images
Figure CN223763683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, and in particular to a core-pulling injection mold with anti-retraction mechanism for the slide. Background Technology
[0002] Currently, some injection molds on the market use hydraulic cylinders to drive the slide block to slide back and forth on the lower mold plate. During injection molding, the slide block is subjected to injection pressure, and the hydraulic cylinder is insufficient to counteract this pressure. This eventually causes the slide block to shift backward, and the injected material overflows from the PL surface of the mold. Over time, this can easily lead to problems such as burrs and flash on the product, affecting its quality.
[0003] In existing technologies, larger hydraulic cylinders are generally used to solve the above problems. However, using larger hydraulic cylinders undoubtedly increases equipment costs and results in a lower cost-performance ratio. Utility Model Content
[0004] The purpose of this utility model is to provide a core-pulling injection mold with anti-retrograde slide, which aims to solve or at least partially solve the shortcomings of the above-mentioned background technology. It can prevent the slide seat from regressing during the injection process, thereby preventing defects such as burrs and flash from the product and improving the product yield.
[0005] This utility model provides a core-pulling injection mold with anti-retrograde sliding mechanism, including an upper mold plate and a lower mold plate. A cavity for molding the product is provided between the upper and lower mold plates. A sliding seat is slidably mounted on the lower mold plate, and an inclined guide post for pushing the sliding seat is provided on the upper mold plate. A sliding insert is slidably mounted on the sliding seat. The sliding insert passes through the lower mold plate and the sliding seat in sequence from the outside to the inside in a horizontal direction. One end of the sliding insert is connected to a driving device, and the other end of the sliding insert can extend into the cavity. The upper mold plate, lower mold plate, sliding seat, and sliding insert together form the core-pulling mold. The cavity and the lower template are elastically provided with a limiting block to prevent the slide seat from retracting. At least a part of the limiting block can penetrate the slide seat to restrict the slide seat from sliding. The slide insert is provided with an abutting block to release the limiting block from restricting the slide seat from sliding. The abutting block is movably disposed in the slide seat. During injection molding, the limiting block abuts against the slide seat and restricts the slide seat from sliding outward. During mold opening, the slide insert slides outward and detaches from the product, completing the core pulling. When the abutting block abuts against the limiting block, the abutting block releases the restriction on the slide seat from sliding, and the slide seat slides outward, completing the product demolding.
[0006] Furthermore, a limiting hole is provided on the lower surface of the slide seat, and the limiting hole cooperates with the limiting block; during injection molding, at least a part of the limiting block passes through the limiting hole and protrudes above the limiting hole.
[0007] Furthermore, the slide seat has a through hole that mates with the slide insert, and the slide insert is movably disposed in the through hole.
[0008] Furthermore, the sliding seat has an inwardly opened movable hole that mates with the abutment block. The movable hole is located below the mating hole and above the limiting hole, and the movable hole, mating hole, and limiting hole are connected. The abutment block is movably disposed in the movable hole.
[0009] Furthermore, the connection between the movable hole and the mating hole has a limiting surface, which is used to limit the excessive extension of the sliding insert into the cavity.
[0010] Furthermore, the limiting block is provided with a first inclined surface; when the mold is opened, the first inclined surface abuts against the abutting block.
[0011] Furthermore, the abutment block is provided with a second inclined surface that mates with the first inclined surface; when the mold is opened, the second inclined surface abuts against the first inclined surface.
[0012] Furthermore, the inclination of the first inclined plane is consistent with the inclination of the second inclined plane.
[0013] Furthermore, the limiting block is elastically connected to the lower template through an elastic element. The upper surface of the lower template is recessed with an installation groove, and the elastic element is installed in the installation groove. The two ends of the elastic element abut against the limiting block and the bottom wall of the installation groove, respectively.
[0014] Furthermore, the abutment block is detachably mounted on the position insert.
[0015] The present invention provides a core-pulling injection mold with anti-retrograde sliding mechanism. Through the cooperation of the sliding insert, the sliding seat, and the driving device, the driving device drives the sliding insert to move outward to detach from the product when the mold is opened, thereby achieving core pulling. Through the cooperation of the limiting block and the sliding seat, the limiting block can restrict the sliding seat from sliding on the lower mold plate during injection, thereby preventing the sliding seat from regressing and shifting, thus preventing defects such as burrs and rough edges from forming on the product and improving product yield. Through the cooperation of the limiting block and the abutting block, the abutting block can release the limitation block from restricting the sliding of the sliding seat, while ensuring that the limiting block does not affect the normal use of the mold. Attached Figure Description
[0016] Figure 1 This is a cross-sectional view of a core-pulling injection mold for preventing slippage of the present invention in the mold-closed state.
[0017] Figure 2 This is a cross-sectional view of a core-pulling injection mold for preventing displacement of the slide position according to this utility model after the core pulling is completed.
[0018] Figure 3 This is a cross-sectional view of a core-pulling injection mold for preventing slippage of the present invention after demolding.
[0019] Figure 4 for Figure 1 A magnified diagram of point A in the middle.
[0020] Figure 5 for Figure 2 A magnified diagram of point B in the middle.
[0021] Figure 6 for Figure 3 A magnified diagram of point C.
[0022] Figure 7 for Figure 1 The diagram shows the row position. Detailed Implementation
[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0024] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0025] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.
[0026] Please see Figures 1-3 A core-pulling injection mold with anti-retraction sliding mechanism includes an upper mold plate 10 and a lower mold plate 20. A cavity 50 for molding the product is provided between the upper mold plate 10 and the lower mold plate 20. A sliding seat 30 is slidably provided on the lower mold plate 20. An inclined guide post 11 for pushing the sliding seat 30 is provided on the upper mold plate 10.
[0027] A sliding insert 31 is slidably disposed on the slide seat 30. The sliding insert 31 passes through the lower template 20 and the slide seat 30 sequentially from the outside to the inside in the horizontal direction. One end of the sliding insert 31 is connected to the driving device 40, and the other end of the sliding insert 31 can extend into the cavity 50. The upper template 10, the lower template 20, the slide seat 30, and the sliding insert 31 together form the cavity 50. A limiting block 21 is elastically disposed on the lower template 20 to prevent the slide seat 30 from retracting. At least a part of the limiting block 21 can penetrate the slide seat 30 to restrict the sliding of the slide seat 30. An abutment block 32 is disposed on the slide insert 31 to release the limiting block 21 from restricting the sliding of the slide seat 30. The abutment block 32 is movably disposed within the slide seat 30.
[0028] During injection molding, the limiting block 21 abuts against the slide seat 30 and restricts the slide seat 30 from sliding outward.
[0029] When the mold is opened, the slide insert 31 slides outward and detaches from the product, completing the core pulling; when the abutment block 32 abuts against the limit block 21, the abutment block 32 releases the restriction on the sliding of the slide seat 30, and the slide seat 30 slides outward, completing the product demolding.
[0030] As described above, the core-pulling injection mold with anti-retraction mechanism provided by this utility model, through the cooperation of the slide insert 31, the slide seat 30, and the driving device 40, enables the driving device 40 to drive the slide insert 31 to move outward to detach from the product when the mold is opened, thereby achieving core pulling; through the cooperation of the limiting block 21 and the slide seat 30, the limiting block 21 can restrict the slide seat 30 from sliding on the lower template 20 during injection molding, thereby preventing the slide seat 30 from retracting and shifting, thus preventing defects such as burrs and rough edges from forming on the product and improving product yield; through the cooperation of the limiting block 21 and the abutment block 32, the abutment block 32 can release the limitation of the limiting block 21 on the sliding of the slide seat 30, while ensuring that the limiting block 21 does not affect the normal use of the mold.
[0031] Please see Figure 3 and Figure 7 The slide seat 30 has an inclined guide hole 37 corresponding to the inclined guide post 11. Through the cooperation of the inclined guide post 11 and the inclined guide hole 37, the upper template 10 drives the slide seat 30 to slide on the lower template 20.
[0032] Please see Figure 4 , Figure 5 and Figure 7 A limiting hole 33 is provided on the lower surface of the slide seat 30, and the limiting hole 33 cooperates with the limiting block 21. During injection molding, at least a part of the limiting block 21 passes through the limiting hole 33 and protrudes above the limiting hole 33. At this time, the side wall of the limiting block 21 abuts against the hole wall of the limiting hole 33, and the limiting block 21 restricts the sliding of the slide seat 30, thereby preventing the slide seat 30 from moving backward.
[0033] Furthermore, the slide seat 30 has a through hole 35 that mates with the slide insert 31, and the slide insert 31 is movably disposed in the through hole 35. Under the drive of the drive device 40, the slide insert 31 can extend into or retract from the cavity 50 along the through hole 35.
[0034] Furthermore, the slide seat 30 has an inwardly formed movable hole 34 that mates with the abutment block 32. The movable hole 34 is located below the mating hole 35 and above the limiting hole 33, and the movable hole 34, the mating hole 35, and the limiting hole 33 are connected. The abutment block 32 is movably disposed in the movable hole 34, so that when the mold is opened, the abutment block 32 can abut against the limiting block 21 to release the limitation block 21 on the sliding of the slide seat 30, thereby ensuring the normal operation of the mold.
[0035] More specifically, the connection between the movable hole 34 and the mating hole 35 has a limiting surface 36, which is used to limit the slide insert 31 from over-extending into the cavity 50. During mold closing, the drive device 40 drives the slide insert 31 to slide inward to extend into the cavity 50. When the abutment block 32 abuts against the limiting surface 36, it means that the slide insert 31 has extended to the predetermined position, and the drive device 40 stops working. The limiting surface 36 plays a limiting role.
[0036] Please see Figure 4 The limiting block 21 is provided with a first inclined surface 211. When the mold is opened, the first inclined surface 211 abuts against the abutting block 32. Since the limiting block 21 is elastically set on the lower mold plate 20, when the abutting block 32 abuts against the first inclined surface 211, the abutting block 32 presses the limiting block 21 downward, causing the limiting block 21 to move downward and gradually exit the limiting hole 33, thereby releasing the limitation of the limiting block 21 on the sliding of the slide seat 30.
[0037] The abutment block 32 is provided with a second inclined surface 321 that mates with the first inclined surface 211. During mold opening, the second inclined surface 321 abuts against the first inclined surface 211. This arrangement ensures that the second inclined surface 321 experiences balanced force when abutting against the first inclined surface 211, thereby improving the stability of the limiting block 21 during downward displacement. In addition, it reduces wear on the abutment block 32 and the first inclined surface 211, extending the service life of the abutment block 32 and the limiting block 21, and reducing production costs.
[0038] More specifically, the inclination of the first inclined surface 211 is consistent with the inclination of the second inclined surface 321. This arrangement makes the process of the abutment block 32 pressing against and downwardly squeezing the limiting block 21 smoother, more continuous, and more stable.
[0039] Please see Figure 1 and Figure 4 The limiting block 21 is elastically connected to the lower template 20 via an elastic element 22. The upper surface of the lower template 20 is recessed with a mounting groove 23, and the elastic element 22 is installed in the mounting groove 23. The two ends of the elastic element 22 abut against the limiting block 21 and the bottom wall of the mounting groove 23, respectively. In this embodiment, the elastic element 22 is a spring.
[0040] Furthermore, the lower end of the limiting block 21 has a limiting part 212, and the mounting groove 23 has a limiting protrusion 231 corresponding to the limiting part 212. Through the cooperation of the limiting part 212 and the limiting protrusion 231, the limiting block 21 can be prevented from detaching from the mounting groove 23.
[0041] The abutment block 32 and the sliding insert 31 can be integrally formed or separately configured. In this embodiment, the abutment block 32 is detachably mounted on the sliding insert 31. If the abutment block 32 wears out, it can be directly replaced without replacing the sliding insert 31. This configuration reduces maintenance costs, thereby reducing production costs.
[0042] In this embodiment, the drive device 40 is a hydraulic cylinder.
[0043] The working process of this anti-retraction core-pulling injection mold:
[0044] Please see Figures 1-6 When the mold is being injected, the limiting block 21 partially passes through the limiting hole 33 and extends into the movable hole 34. At this time, the limiting block 21 restricts the sliding of the slide seat 30. When the mold is opened, the driving device 40 drives the slide insert 31 to move outward to detach from the product. The abutment block 32 moves outward along with the slide insert 31. The abutment block 32 abuts against and presses down on the limiting block 21. When the lower surface of the abutment block 32 abuts against the lower surface of the limiting block 21, the driving device 40 stops working, and the slide insert 31 and the abutment block 32 stop moving, completing the core pulling. Then, the upper template 10 moves upward, thereby driving the slide seat 30 to slide outward. The lower edge of the limiting hole 33 abuts against the second inclined surface 321 of the limiting block 21 to further press down on the limiting block 21. After the mold is fully opened, the limiting block 21 is located below the slide seat 30 and abuts against the lower surface of the slide seat 30.
[0045] The advantages of the core-pulling injection mold with anti-retrograde slide provided by this utility model include: during injection molding, it can prevent the slide seat from retracting and shifting, thereby preventing defects such as burrs and rough edges from forming on the product and improving the product yield.
[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A core-pulling injection mold with anti-ejection of the slide, comprising an upper mold plate (10) and a lower mold plate (20), a cavity (50) for molding a product is arranged between the upper mold plate (10) and the lower mold plate (20), a slide seat (30) is arranged on the lower mold plate (20) in a sliding manner, and an inclined guide pillar (11) for pushing the slide seat (30) is arranged on the upper mold plate (10), characterized in that, The row seat (30) is slidably provided with a row insert (31), the row insert (31) is sequentially penetrated from outside to inside along the horizontal direction through the lower die plate (20), the row seat (30), one end of the row insert (31) is connected with the driving device (40), the other end of the row insert (31) can extend into the cavity (50), the upper die plate (10), the lower die plate (20), the row seat (30), the row insert (31) jointly enclose the cavity (50), the lower die plate (20) is elastically provided with a limiting block (21) for preventing the row seat (30) from retreating, at least part of the limiting block (21) can penetrate into the row seat (30) to limit the sliding of the row seat (30), the row insert (31) is provided with an abutting block (32) for removing the sliding limitation of the limiting block (21) on the row seat (30), the abutting block (32) is movably arranged in the row seat (30). When injection molding, the limiting block (21) abuts against the row seat (30) and limits the outward sliding of the row seat (30). When opening the mold, the row insert (31) slides outward and separates from the product, completing the core pulling; when the abutting block (32) abuts against the limiting block (21), the abutting block (32) removes the sliding limitation of the row seat (30), the row seat (30) slides outward, completing the product demolding.
2. The core-pulling injection mold of claim 1, wherein, The lower surface of the row seat (30) is provided with a limiting hole (33), the limiting hole (33) is matched with the limiting block (21); when injection molding, at least part of the limiting block (21) penetrates into the limiting hole (33) and protrudes above the limiting hole (33).
3. The core-pulling injection mold of claim 2, wherein, The row seat (30) is provided with a matching hole (35) matched with the row insert (31), the row insert (31) is movably arranged in the matching hole (35).
4. The core-pulling injection mold of claim 3, wherein The row seat (30) is provided with a movable hole (34) matched with the abutting block (32) inward, the movable hole (34) is respectively located below the matching hole (35) and above the limiting hole (33), and the movable hole (34), the matching hole (35) and the limiting hole (33) are communicatively arranged, and the abutting block (32) is movably arranged in the movable hole (34).
5. The core-pulling injection mold of claim 4, wherein The connection between the movable hole (34) and the matching hole (35) has a limiting surface (36), the limiting surface (36) is used for limiting the row insert (31) from excessively extending into the cavity (50).
6. The core-pulling injection mold of claim 1, wherein The limiting block (21) is provided with a first inclined surface (211); when opening the mold, the first inclined surface (211) abuts against the abutting block (32).
7. The core-pulling injection mold of claim 6, wherein The abutting block (32) is provided with a second inclined surface (321) matched with the first inclined surface (211); when opening the mold, the second inclined surface (321) abuts against the first inclined surface (211).
8. The core-pulling injection mold of claim 7, wherein, The inclination of the first inclined surface (211) is consistent with the inclination of the second inclined surface (321).
9. The core-pulling injection mold of claim 1, wherein The limiting block (21) is elastically connected with the lower mold plate (20) through an elastic member (22), the upper surface of the lower mold plate (20) is concavely provided with a mounting groove (23), the elastic member (22) is mounted in the mounting groove (23), and the two ends of the elastic member (22) abut against the limiting block (21) and the bottom wall of the mounting groove (23) respectively.
10. The core-pulling injection mold of claim 1, wherein The abutting block (32) is detachably mounted on the row position insert (31).