Tunnel core-pulling anti-retreating mechanism of injection mold

Abstract

The utility model relates to an injection mold tunnel core-pulling anti-retreating mechanism which comprises a cavity plate with a forming face, a core-pulling block, a sliding seat, an anti-retreating block and a driving assembly, the sliding seat is slidably connected to the cavity plate, a tunnel is formed in the cavity plate, one end of the core-pulling block is slidably connected into the tunnel, and the other end of the core-pulling block is slidably connected to the sliding seat; the anti-retreat block is connected to the cavity plate in a sliding mode, an anti-retreat groove matched with the anti-retreat block is formed in the sliding seat, the driving assembly is used for driving the sliding seat and the anti-retreat block to slide, when the sliding seat slides towards one side of the core pulling block to a limit position, the anti-retreat groove right faces the anti-retreat block, and when the anti-retreat block slides to be matched with the anti-retreat groove, the sliding seat cannot move. When the mold is in a mold closing state, the anti-retreating block is matched with the anti-retreating groove to limit the position of the sliding seat on the cavity plate, so that the position of the core pulling block in the tunnel is limited, and the possibility of core pulling retreating during injection molding is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially is related to a kind of injection mold tunnel core pulling anti-retreating mechanism. BACKGROUND

[0002] Injection mold core pulling refers to in injection molding process, to realize the production of complex shape injection part, need to set up core pulling device in mould, and the molding and demolding of injection part are realized by core pulling. Complex shape and structure of injection part can be realized.

[0003] The utility model with publication number CN206217081U discloses a kind of injection mold core pulling anti-retreating mechanism, including core pulling block, T-shaped slider, oil cylinder connecting piece and oil cylinder, the T-shaped slider right side is provided with vertical oil cylinder T slot, oil cylinder connecting piece is inserted into oil cylinder T slot, oil cylinder connecting piece is connected with oil cylinder piston rod, T-shaped guide rail is set on the T-shaped slider, the T-shaped guide rail includes the anti-retreating horizontal guide rail in the upper left side and the lower right side of T-shaped slider, anti-retreating horizontal guide rail is communicated with core pulling oblique guide rail between two, core pulling block upper side two sides are provided with core pulling block T slot, the core pulling block T slot is inserted into T-shaped guide rail and can slide in T-shaped guide rail, the upper and lower surfaces of the core pulling block T slot include two planes that are mutually angled, the included angle of two link planes is adapted to the included angle of anti-retreating horizontal guide rail and core pulling oblique guide rail.

[0004] The core pulling anti-retreating mechanism in the above technical solution is positioned and locked by setting anti-retreating horizontal guide rail and core pulling block T slot, but it does not limit the position of T-shaped slider during injection molding. When the huge pressure inside promotes the core pulling block to exit outward during injection molding, the T-shaped slider can still slide, causing the core pulling to retreat during injection molding, which affects product quality, product qualification rate and production efficiency. UTILITY MODEL CONTENTS

[0005] In order to reduce the phenomenon of core pulling retreat during injection molding, the present application provides a kind of injection mold tunnel core pulling anti-retreating mechanism.

[0006] The injection mold tunnel core pulling anti-retreating mechanism provided by the present application adopts the following technical solution:

[0007] A tunnel-type core-pulling anti-retraction mechanism for injection molds includes a cavity plate with a molding surface, a core-pulling block, a sliding seat, an anti-retraction block, and a driving assembly. The sliding seat is slidably connected to the cavity plate, and a tunnel is formed in the cavity plate. One end of the core-pulling block is slidably connected to the tunnel along an inclination with the mold opening direction, and the other end of the core-pulling block is slidably connected to the sliding seat. The anti-retraction block is slidably connected to the cavity plate, and an anti-retraction groove that can cooperate with the anti-retraction block is formed on the sliding seat. The driving assembly is used to drive the sliding seat and the anti-retraction block to slide respectively. When the sliding seat slides to the limit position towards the core-pulling block, the anti-retraction groove is directly opposite the anti-retraction block. When the anti-retraction block slides to cooperate with the anti-retraction groove, the sliding seat cannot move.

[0008] By adopting the above technical solution, when the mold is in the closed state, the anti-retraction block and the anti-retraction groove cooperate to limit the position of the sliding seat on the cavity plate, thereby limiting the position of the core-pulling block in the tunnel, reducing the possibility of displacement of the core-pulling block caused by the huge internal pressure during the injection process, and thus reducing the possibility of core-pulling back during injection.

[0009] Preferably, the anti-retraction block is slidably connected to the cavity plate along a sliding square perpendicular to the sliding seat, and an anti-slip abutment block is provided at one end of the anti-retraction block in the sliding direction. When the anti-retraction block cooperates with the anti-retraction groove, the anti-slip abutment block abuts against the bottom surface of the anti-retraction groove.

[0010] By adopting the above technical solution, and by setting up anti-slip abutment blocks, the friction between the anti-slip abutment blocks and the bottom surface of the anti-retraction groove is reduced, thereby reducing the possibility of sliding seat offset due to the gap between the anti-retraction blocks and the anti-retraction groove when they are engaged. This improves the precision of the mold and reduces the possibility of core pulling back during injection molding.

[0011] Preferably, the anti-slip abutment block is tapered from the end furthest from the sliding seat to the end closest to the sliding seat.

[0012] By adopting the above technical solution, the sliding of the anti-retraction block is guided, which facilitates the cooperation between the anti-retraction block and the anti-retraction groove.

[0013] Preferably, the sliding seat is provided with a slide rail, the slide rail is provided with a locking block, the core-pulling block is slidably connected to the slide rail, and the core-pulling block is provided with a locking groove that can cooperate with the locking block. When the first sliding seat slides to the limit position towards the core-pulling block, the locking block cooperates with the locking groove.

[0014] By adopting the above technical solution, that is, when the mold is in the closed state, the position of the core-pulling block on the slide rail is limited, which reduces the possibility that the huge internal pressure during injection will cause the core-pulling block to retract outward and the sliding seat to slide, thereby reducing the possibility of the core-pulling retraction phenomenon during injection and increasing product accuracy.

[0015] Preferably, the drive assembly includes a first hydraulic cylinder, a second hydraulic cylinder, and a limit switch. The first hydraulic cylinder is fixedly connected to the cavity plate, and one end of the piston rod of the first hydraulic cylinder is fixedly connected to the sliding seat. The limit switch is used to limit the movement of the piston rod of the first hydraulic cylinder. The second hydraulic cylinder is fixedly connected to the cavity plate, and one end of the piston rod of the second hydraulic cylinder is fixedly connected to the anti-retraction block.

[0016] By adopting the above technical solution, the sliding seat and the limiting block are driven to slide by the first and second oil cylinders respectively, providing sufficient force to the sliding seat and the limiting block, reducing the possibility of the sliding seat sliding, thereby reducing the possibility of core pulling back during injection molding.

[0017] Preferably, the cavity plate is provided with a first limiting block and a second limiting block respectively. The first oil cylinder is provided with a first limiting groove that can cooperate with the first limiting block. When the first oil cylinder is set on the cavity plate, the first limiting block cooperates with the first limiting groove. The second oil cylinder is provided with a second limiting groove that can cooperate with the second limiting groove. When the second oil cylinder is set on the cavity plate, the second limiting block cooperates with the second limiting groove.

[0018] By adopting the above technical solution, the positions of the first oil cylinder and the second oil cylinder on the cavity plate are limited by the cooperation of the first limiting block and the first limiting groove, and the cooperation of the second limiting block and the second limiting groove. When the huge internal pressure is generated during injection molding, causing the core pulling block to withdraw outward, the position of the first oil cylinder or the second oil cylinder on the cavity plate may become loose and shift, thereby reducing the possibility of the core pulling back during injection molding.

[0019] Preferably, the limit switch includes a contact and two contacts. The two contacts are respectively fixedly connected to the cavity plate, and the contact is fixedly connected to the sliding seat. The contact is located between the two contacts. When the sliding seat slides to the point where the contact abuts against either contact, the piston rod of the first cylinder stops moving.

[0020] By adopting the above technical solution, the movement of the piston rod of the first oil cylinder is limited by the limit switch, thereby limiting the movement of the sliding seat, so as to improve the precision of the sliding seat and reduce the possibility that the anti-reverse block cannot cooperate with the anti-reverse groove.

[0021] The main technical effects of this utility model are reflected in the following aspects:

[0022] 1. This utility model, by setting an anti-retraction block and an anti-retraction groove, when the mold is in the mold-closed state, makes the anti-retraction block cooperate with the anti-retraction groove to limit the position of the sliding seat on the cavity plate, thereby limiting the position of the core-pulling block in the tunnel, reducing the possibility of displacement of the core-pulling block caused by the huge internal pressure during the injection process, thereby reducing the possibility of the core-pulling back phenomenon during injection.

[0023] 2. This utility model, by setting an anti-slip abutment block, reduces the possibility of sliding seat offset due to the gap between the anti-slip block and the anti-retraction groove when the anti-slip abutment block abuts against the bottom surface of the anti-retraction groove, thereby improving the precision of the mold and reducing the possibility of core pulling back during injection molding.

[0024] 3. This utility model sets up a locking block and a locking groove, that is, when the mold is in the closed state, the position of the core-pulling block on the slide rail is limited, which reduces the possibility that the huge internal pressure during injection will cause the core-pulling block to retract outward and the sliding seat to slide, thereby reducing the possibility of the core-pulling retraction phenomenon during injection and increasing product accuracy. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0026] Figure 2 It is along Figure 1 Enlarged view of point A in the middle.

[0027] Figure 3 This is a schematic diagram of the cavity plate structure according to an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the sliding seat structure according to an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the anti-slip block structure according to an embodiment of this application.

[0030] Figure 6 It is along Figure 5 Enlarged view of point B in the middle.

[0031] Figure 7 It is along Figure 5 A magnified view of point C in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Cavity plate; 11. Tunnel; 12. First limiting block; 13. Second limiting block; 2. Core pulling block; 21. Slot; 3. Sliding seat; 31. Slide rail; 32. Locking block; 33. Anti-retraction groove; 4. Anti-retraction block; 41. Anti-slip abutment block; 5. Drive assembly; 51. First hydraulic cylinder; 52. Second hydraulic cylinder; 53. Limit switch; 531. Contact; 532. Contact head. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0034] This application discloses a core-pulling and anti-retraction mechanism for injection mold tunnels.

[0035] Reference Figure 1 and Figure 3 This embodiment of an injection mold tunnel core-pulling anti-retraction mechanism includes a cavity plate 1 with a molding surface, a core-pulling block 2 with a molding surface, a sliding seat 3, an anti-retraction block 4, and a driving assembly 5. The sliding seat 3 is slidably connected to the cavity plate 1 along the mold opening direction perpendicular to the mold. A tunnel 11 is formed on the cavity plate 1. One end of the core-pulling block 2 with a molding surface is slidably connected to the tunnel 11 along the mold opening direction of the mold. The other end of the core-pulling block 2 is slidably connected to the sliding seat 3. The anti-retraction block 4 is slidably connected to the cavity plate 1. An anti-retraction groove 33 that can cooperate with the anti-retraction block 4 is formed on the sliding seat 3. The driving assembly 5 is used to drive the sliding seat 3 and the anti-retraction block 4 to slide respectively. When the sliding seat 3 slides to the limit position towards the core-pulling block 2, the anti-retraction groove 33 is directly opposite the anti-retraction block 4. When the anti-retraction block 4 slides to cooperate with the anti-retraction groove 33, the sliding seat 3 cannot move.

[0036] Reference Figure 1 and Figure 3 When the mold is in the closed state, the anti-retraction block 4 cooperates with the anti-retraction groove 33 to limit the position of the sliding seat 3 on the cavity plate 1, thereby limiting the position of the core-pulling block 2 in the tunnel 11, reducing the possibility of displacement of the core-pulling block 2 caused by the huge internal pressure during the injection process, and thus reducing the possibility of core-pulling back during injection.

[0037] Reference Figure 5 and Figure 6 The anti-retraction block 4 is slidably connected to the cavity plate 1 along a sliding square perpendicular to the sliding seat 3. One end of the anti-retraction block 4 in the sliding direction is provided with an anti-slip abutment block 41. When the anti-retraction block 4 engages with the anti-retraction groove 33, the anti-slip abutment block 41 abuts against the bottom surface of the anti-retraction groove 33. By providing the anti-slip abutment block 41, the friction force when the anti-slip abutment block 41 abuts against the bottom surface of the anti-retraction groove 33 reduces the possibility of the sliding seat 3 shifting due to a gap between the anti-retraction block 4 and the anti-retraction groove 33, thereby improving the precision of the mold and reducing the possibility of core pull-back during injection molding. The anti-slip abutment block 41 is tapered from the end furthest from the sliding seat 3 to the end closest to the sliding seat 3. This guides the sliding of the anti-retraction block 4, facilitating its engagement with the anti-retraction groove 33.

[0038] Reference Figure 4 and Figure 7The sliding seat 3 has a slide rail 31, and a locking block 32 is fixedly connected to the slide rail 31. The core-pulling block 2 is slidably connected to the slide rail 31. The core-pulling block 2 has a locking groove 21 that can cooperate with the locking block 32. When the first sliding seat 3 slides to the limit position towards the core-pulling block 2, the locking block 32 cooperates with the locking groove 21. That is, when the mold is in the mold-closed state, the position of the core-pulling block 2 on the slide rail 31 is limited, reducing the possibility that the huge internal pressure during injection will cause the core-pulling block 2 to retract outward and the sliding seat 3 to slide, thereby reducing the possibility of core-pulling back during injection and increasing product accuracy.

[0039] Reference Figure 1 and Figure 2 The drive assembly 5 includes a first hydraulic cylinder 51, a second hydraulic cylinder 52, and a limit switch 53. The first hydraulic cylinder 51 is fixedly connected to the cavity plate 1, and one end of the piston rod of the first hydraulic cylinder 51 is fixedly connected to the sliding seat 3. The limit switch 53 is used to limit the movement of the piston rod of the first hydraulic cylinder 51. The second hydraulic cylinder 52 is fixedly connected to the cavity plate 1, and one end of the piston rod of the second hydraulic cylinder 52 is fixedly connected to the anti-retraction block 4. By driving the sliding seat 3 and the limit block to slide through the first hydraulic cylinder 51 and the second hydraulic cylinder 52 respectively, sufficient force is provided to the sliding seat 3 and the limit block, reducing the possibility of the sliding seat 3 sliding, thereby reducing the possibility of core pulling back during injection molding.

[0040] Reference Figure 3 and Figure 4 A first limiting block 12 and a second limiting block 13 are fixedly connected to the cavity plate 1. A first limiting groove is provided on the first hydraulic cylinder 51 to cooperate with the first limiting block 12. When the first hydraulic cylinder 51 is mounted on the cavity plate 1, the first limiting block 12 cooperates with the first limiting groove. A second limiting groove is provided on the second hydraulic cylinder 52 to cooperate with the second limiting groove. When the second hydraulic cylinder 52 is mounted on the cavity plate 1, the second limiting block 13 cooperates with the second limiting groove. Through the cooperation of the first limiting block 12 with the first limiting groove and the second limiting block 13 with the second limiting groove, the positions of the first hydraulic cylinder 51 and the second hydraulic cylinder 52 on the cavity plate 1 are respectively limited. When the internal pressure generates a huge force during injection molding, causing the core-pulling block 2 to retract outwards, the possibility of the first hydraulic cylinder 51 or the second hydraulic cylinder 52 becoming loose and shifting on the cavity plate 1 is reduced, thereby decreasing the possibility of core-pulling retraction during injection molding.

[0041] Reference Figure 2 and Figure 4The limit switch 53 includes a contact 532 and two contacts 531. The two contacts 531 are fixedly connected to the cavity plate 1, and the contact 532 is fixedly connected to the sliding seat 3, with the contact 532 located between the two contacts 531. When the sliding seat 3 slides until the contact 532 abuts against either contact 531, the piston rod of the first hydraulic cylinder 51 stops moving. By limiting the movement of the piston rod of the first hydraulic cylinder 51 through the limit switch 53, the movement of the sliding seat 3 is limited, thereby improving the precision of the sliding of the sliding seat 3 and reducing the possibility that the anti-retraction block 4 cannot cooperate with the anti-retraction groove 33.

[0042] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A core-pulling anti-retraction mechanism for injection mold tunnels, characterized in that: The mold includes a cavity plate (1) with a molding surface, a core-pulling block (2), a sliding seat (3), an anti-retraction block (4), and a drive assembly (5). The sliding seat (3) is slidably connected to the cavity plate (1). A tunnel (11) is formed in the cavity plate (1). One end of the core-pulling block (2) is slidably connected to the tunnel (11) along the opening direction of the mold. The other end of the core-pulling block (2) is slidably connected to the sliding seat (3). The anti-retraction block (4) is slidably connected to the mold. Connected to the cavity plate (1), the sliding seat (3) has an anti-retraction groove (33) that can cooperate with the anti-retraction block (4). The driving assembly (5) is used to drive the sliding seat (3) and the anti-retraction block (4) to slide respectively. When the sliding seat (3) slides to the limit position towards the core pulling block (2), the anti-retraction groove (33) is directly opposite the anti-retraction block (4). When the anti-retraction block (4) slides to cooperate with the anti-retraction groove (33), the sliding seat (3) cannot move.

2. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 1, characterized in that: The anti-retraction block (4) is slidably connected to the cavity plate (1) along a sliding square perpendicular to the sliding seat (3). One end of the anti-retraction block (4) in the sliding direction is provided with an anti-slip abutment block (41). When the anti-retraction block (4) cooperates with the anti-retraction groove (33), the anti-slip abutment block (41) abuts against the bottom surface of the anti-retraction groove (33).

3. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 2, characterized in that: The anti-slip abutment block (41) is set in a tapering shape from the end away from the sliding seat (3) to the end close to the sliding seat (3).

4. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 2, characterized in that: The sliding seat (3) is provided with a slide rail (31), and the slide rail (31) is provided with a locking block (32). The core-pulling block (2) is slidably connected to the slide rail (31). The core-pulling block (2) is provided with a slot (21) that can cooperate with the locking block (32). When the first sliding seat (3) slides to the limit position towards the core-pulling block (2), the locking block (32) cooperates with the slot (21).

5. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 1, characterized in that: The drive assembly (5) includes a first cylinder (51), a second cylinder (52), and a limit switch (53). The first cylinder (51) is fixedly connected to the cavity plate (1), and one end of the piston rod of the first cylinder (51) is fixedly connected to the sliding seat (3). The limit switch (53) is used to limit the movement of the piston rod of the first cylinder (51). The second cylinder (52) is fixedly connected to the cavity plate (1), and one end of the piston rod of the second cylinder (52) is fixedly connected to the anti-retraction block (4).

6. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 5, characterized in that: The cavity plate (1) is provided with a first limiting block (12) and a second limiting block (13). The first oil cylinder (51) is provided with a first limiting groove that can cooperate with the first limiting block (12). When the first oil cylinder (51) is set on the cavity plate (1), the first limiting block (12) cooperates with the first limiting groove. The second oil cylinder (52) is provided with a second limiting groove that can cooperate with the second limiting groove. When the second oil cylinder (52) is set on the cavity plate (1), the second limiting block (13) cooperates with the second limiting groove.

7. The injection mold tunnel core-pulling anti-retraction mechanism according to claim 5, characterized in that: The limit switch (53) includes a contact (532) and two contacts (531). The two contacts (531) are fixedly connected to the cavity plate (1) respectively. The contact (532) is fixedly connected to the sliding seat (3) and the contact (532) is located between the two contacts (531). When the sliding seat (3) slides to the point where the contact (532) abuts against the other contact (531), the piston rod of the first oil cylinder (51) stops moving.

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