Multi-direction secondary sliding block core-pulling mold structure

Abstract

The invention discloses a multidirectional secondary sliding block core-pulling mold structure which comprises a primary sliding block, a secondary sliding block and a driving shovel base, the primary sliding block is in sliding fit with a secondary sliding groove, the driving shovel base is arranged above the secondary sliding block and used for driving the primary sliding block to slide front and back, a workpiece forming surface is formed at the front end of the primary sliding block, and the secondary sliding block is arranged on the workpiece forming surface. A core-pulling sliding block is arranged above and / or below the primary sliding block in a stacked mode, the core-pulling sliding block can slide front and back relative to the primary sliding block, the front-back sliding track of the core-pulling sliding block is located on the radial extension line of the workpiece forming face, and a forming pin rod protruding towards the front side of the workpiece forming face is arranged at the front end of the core-pulling sliding block. The top face and / or the bottom face of the primary sliding block are / is provided with containing grooves corresponding to the core pulling sliding blocks in a one-to-one mode, movable limiting blocks protruding towards the interiors of the containing grooves are formed at the rear ends of the core pulling sliding blocks, and the movable limiting blocks can move left and right relative to the containing grooves. The multi-directional synchronous core-pulling mechanism can realize multi-directional synchronous core-pulling, and is simple in structure and simplified in action process.

Description

Technical Field

[0001] The present invention relates to an injection mold, and in particular to a multi-direction secondary slider core-pulling mold structure. Background Art

[0002] Many existing injection-molded workpieces need to directly form hole positions during the injection molding process. For the hole positions on a flat surface, only the straight forward and backward movement of the forming pin can achieve core-pulling. However, for an injection-molded workpiece 100 as shown in Figure 1 Figure 10, it has curved surfaces and arc surfaces, and the hole positions 101 on the curved surfaces and arc surfaces face in different directions. Therefore, the forming pins located on the curved surfaces and arc surfaces also face in different directions. It is very difficult for the forming pins in multiple directions to perform core-pulling simultaneously. If a separate slider is set for each forming pin, it will cause the complexity of the mold structure and is not conducive to structural design and motion control. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-direction secondary slider core-pulling mold structure that can perform multi-direction synchronous core-pulling, and has a simple structure and a simplified operation process, aiming at the deficiencies of the prior art.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions.

[0005] A multi-direction secondary slider core-pulling mold structure includes a primary slider, a secondary slider, and a driving shovel base. A secondary chute penetrating through the front and rear ends of the secondary slider is provided in the secondary slider. The rear end of the primary slider is disposed in the secondary chute, and the primary slider is slidably engaged with the secondary chute. The driving shovel base is disposed above the secondary slider and is used to drive the primary slider to slide back and forth. A workpiece forming surface is formed at the front end of the primary slider. Core-pulling sliders are stacked above and / or below the primary slider. The core-pulling sliders can slide back and forth relative to the primary slider, and the front-back sliding trajectories of the core-pulling sliders are located on the radial extension line of the workpiece forming surface. A forming pin protruding forward from the front side of the workpiece forming surface is provided at the front end of the core-pulling slider. Accommodating grooves corresponding to the core-pulling sliders one by one are provided on the top surface and / or bottom surface of the primary slider. An active limiting block protruding into the accommodating groove is formed at the rear end of the core-pulling slider, and the active limiting block can move left and right relative to the accommodating groove.

[0006] Preferably, a plurality of core-pulling sliders are provided above and below the primary slider.

[0007] Preferably, the workpiece forming surface is an inner concave arc surface, and the accommodating groove extends a preset length along the tangent direction of the workpiece forming surface.

[0008] Preferably, cover plates are provided on both the upper and lower sides of the primary slider, and the primary slider is slidably engaged with the cover plates in the front-back direction. A plurality of guiding grooves are formed on the side of the cover plate facing the primary slider, and the core-pulling sliders are respectively disposed in the guiding grooves and slidably engaged therewith.

[0009] Preferably, a plurality of limiting sliding grooves are formed in the primary slider, and the distribution line of the plurality of limiting sliding grooves is perpendicular to the sliding direction of the primary slider. A plurality of cover plate limiting blocks are fixed on the cover plate, and the cover plate limiting blocks are respectively disposed in the limiting sliding grooves and can slide back and forth relative to the limiting sliding grooves.

[0010] Preferably, it includes a forming inner mold, and the forming inner mold is fixed between the upper and lower cover plates, and the workpiece forming surface is formed at the front end of the forming inner mold.

[0011] Preferably, a radial limiting groove is provided at the rear end of the guiding groove, and the radial limiting groove extends along the radial direction of the workpiece forming surface. A radial limiting block is provided at the rear end of the core-pulling slider, and the radial limiting block is disposed in the radial limiting groove and slidably engaged therewith.

[0012] Preferably, a plurality of fixing clamping grooves are respectively provided on the upper and lower sides of the forming inner mold, and a plurality of fixing convex buttons corresponding to the fixing clamping grooves are formed on the cover plate, and the fixing convex buttons are clamped in the fixing clamping grooves.

[0013] Preferably, a lifter base through hole is formed in the secondary slider, and a lifter base linkage inclined hole is formed in the primary slider. The driving lifter base sequentially passes through the lifter base through hole and the lifter base linkage inclined hole, and the driving lifter base and the lifter base linkage inclined hole are in abutting engagement through an inclined surface.

[0014] Preferably, a slide bar is fixed to the rear end of the primary slider, the slide bar passes through the secondary slider, and a spring is sleeved on the slide bar, and the spring is clamped between the end cap of the slide bar and the rear end of the secondary slider.

[0015] In the multi-directional secondary slider core-pulling die structure disclosed by the present invention, the secondary slider is used to drive the primary slider and the driving shovel base to move integrally. The driving shovel base is used to drive the primary slider to move forward, so as to push the forming pin rod at the front end of the core-pulling slider into the injection mold cavity. When the injection molding process is completed, the driving shovel base first drives the primary slider to retract backward. Since the front-back sliding trajectory of the core-pulling slider is located on the radial extension line of the workpiece forming surface, the core-pulling slider is restricted to slide only along the radial extension line corresponding to the position of the workpiece forming surface. At the same time, the movable limit block at the rear end of the core-pulling slider is located in the receiving groove, and the movable limit block can move left and right relative to the receiving groove, thereby providing a margin space for the core-pulling slider to move relative to the primary slider. During the retraction process of the primary slider, the core-pulling slider can maintain the posture of sliding backward along the radial extension line of the workpiece forming surface, thereby avoiding the generation of lateral stress between the forming pin rod and the hole position of the workpiece. Compared with the prior art, the present invention not only realizes multi-directional synchronous core-pulling, but also has a simple overall structure. During the movement process, the primary slider first performs a retraction movement, and then the secondary slider performs a secondary retraction movement to complete the core-pulling movement. The entire action process is more simplified, which is conducive to motion control. Description of the Drawings

[0016] Figure 1 Is a three-dimensional view of the injection molded workpiece;

[0017] Figure 2 Is a structural diagram of the present invention and the injection molded workpiece;

[0018] Figure 3 Is a three-dimensional view of the multi-directional secondary slider core-pulling die structure of the present invention;

[0019] Figure 4 Is an exploded view of the multi-directional secondary slider core-pulling die structure of the present invention;

[0020] Figure 5 Is a structural diagram of the primary slider and the cover plate;

[0021] Figure 6 Is a structural diagram of the primary slider and the core-pulling slider;

[0022] Figure 7 Is a structural diagram of the core-pulling slider and the cover plate;

[0023] Figure 8 Is a top view of the multi-directional secondary slider core-pulling die structure of the present invention;

[0024] Figure 9 Is Figure 8 The cross-sectional view taken along line A-A in Detailed Embodiment

[0025] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0026] The present invention discloses a multi-direction secondary slider core-pulling die structure. As shown in Figures 2 to 9 the figure, it includes a primary slider 1, a secondary slider 2 and a driving shovel base 3. A secondary chute 20 penetrating through the front and rear ends of the secondary slider 2 is provided in the secondary slider 2. The rear end of the primary slider 1 is arranged in the secondary chute 20, and the primary slider 1 is slidably matched with the secondary chute 20. The driving shovel base 3 is arranged above the secondary slider 2, and the driving shovel base 3 is used to drive the primary slider 1 to slide back and forth. A workpiece forming surface 10 is formed at the front end of the primary slider 1. Core-pulling sliders 4 are stacked above and / or below the primary slider 1. The core-pulling sliders 4 can slide back and forth relative to the primary slider 1, and the front and rear sliding tracks of the core-pulling sliders 4 are located on the radial extension line of the workpiece forming surface 10. A forming pin rod 40 protruding forward from the front side of the workpiece forming surface 10 is provided at the front end of the core-pulling slider 4. Accommodating grooves 11 corresponding to the core-pulling sliders 4 one by one are provided on the top surface and / or bottom surface of the primary slider 1. A movable limiting block 41 protruding into the accommodating groove 11 is formed at the rear end of the core-pulling slider 4, and the movable limiting block 41 can move left and right relative to the accommodating groove 11.

[0027] In the above structure, the secondary slider 2 is used to drive the overall movement of the primary slider 1 and the driving shovel base 3. The driving shovel base 3 is used to drive the primary slider 1 to move forward, so as to push the forming pin rod 40 at the front end of the core-pulling slider 4 into the injection mold cavity. When the injection process is completed, the driving shovel base 3 first drives the primary slider 1 to retreat backward. Since the front and rear sliding tracks of the core-pulling slider 4 are located on the radial extension line of the workpiece forming surface 10, the core-pulling slider 4 is restricted to slide only along the radial extension line corresponding to the position of the workpiece forming surface 10. At the same time, the movable limiting block 41 at the rear end of the core-pulling slider 4 is located in the accommodating groove 11, and the movable limiting block 41 can move left and right relative to the accommodating groove 11, thereby providing a margin space for the core-pulling slider 4 to move relative to the primary slider 1. During the backward movement of the primary slider 1, the core-pulling slider 4 can maintain the posture of sliding backward along the radial extension line of the workpiece forming surface 10, thereby avoiding the generation of lateral stress between the forming pin rod 40 and the hole position of the workpiece. Compared with the prior art, the present invention not only realizes multi-direction synchronous core-pulling, but also the overall structure of the present invention is simple. During the movement process, the primary slider 1 first performs a backward movement, and then the secondary slider 2 performs a secondary backward movement to complete the core-pulling movement. The whole action process is more simplified, which is beneficial to movement control.

[0028] As Figure 1As shown, there are two rows of hole positions 101, upper and lower, on the curved surface of the injection-molded workpiece. In this embodiment, a plurality of core-pulling sliders 4 are provided above and below the primary slider 1.

[0029] In this embodiment, the workpiece forming surface 10 is a concave arc surface, and the accommodating groove 11 extends a preset length along the tangent direction of the workpiece forming surface 10. For injection-molded workpieces with regular arcs or cylindrical shapes, the plurality of core-pulling sliders 4 are arranged to slide radially with the same center as the reference. However, for injection-molded workpieces with irregular surfaces, the center of the arc surface where the hole positions 101 are located is used as the reference to individually define its radial direction, and thus the extending direction of the core-pulling slider 4 and the extending direction of the accommodating groove 11 are determined.

[0030] As a preferred method, in combination with Figures 4 to 7 As shown, cover plates 5 are provided on both the upper and lower sides of the primary slider 1, and the primary slider 1 is slidably engaged with the cover plates 5 in the front-back direction. A plurality of guide grooves 50 are formed on the side of the cover plate 5 facing the primary slider 1. The core-pulling sliders 4 are respectively arranged in the guide grooves 50 and are slidably engaged with the guide grooves 50.

[0031] In this embodiment, the function of providing the cover plates 5 on both the upper and lower sides of the primary slider 1 is that the cover plates 5 can limit the sliding direction and sliding stroke of the core-pulling sliders 4. In practical applications, the cover plates 5 should move backward during the secondary core-pulling. During the primary core-pulling process, the primary slider 1 needs to slide a preset distance relative to the cover plates 5. Specifically, a plurality of limit sliding grooves 12 are formed on the primary slider 1, and the distribution line of the plurality of limit sliding grooves 12 is perpendicular to the sliding direction of the primary slider 1. A plurality of cover plate limit blocks 52 are fixed on the cover plates 5. The cover plate limit blocks 52 are respectively arranged in the limit sliding grooves 12 and can slide back and forth relative to the limit sliding grooves 12.

[0032] On this basis, this embodiment includes a forming inner mold 6, and the forming inner mold 6 is fixed between the upper and lower cover plates 5. The workpiece forming surface 10 is formed at the front end of the forming inner mold 6. Among them, the forming inner mold 6 is used to both close the mold cavity and assemble and fix the upper and lower cover plates 5.

[0033] In order to limit the radial movement direction of the core-pulling slider 4, in this embodiment, a radial limit groove 51 is provided at the rear end of the guide groove 50. The radial limit groove 51 extends along the radial direction of the workpiece forming surface 10. A radial limit block 42 is provided at the rear end of the core-pulling slider 4. The radial limit block 42 is arranged in the radial limit groove 51 and the two are slidably engaged.

[0034] In this embodiment, the cover plate 5 and the forming inner mold 6 are fixed by snap buttons and clamping grooves. Specifically, a plurality of fixed clamping grooves 60 are respectively provided on the upper and lower sides of the forming inner mold 6, and a plurality of fixed snap buttons 53 corresponding to the fixed clamping grooves 60 one by one are formed on the cover plate 5. The fixed snap buttons 53 are clamped in the fixed clamping grooves 60.

[0035] As a preferred driving method, in this embodiment, a shovel base perforation 21 is provided on the secondary slider 2, a shovel base linkage inclined hole 13 is provided on the primary slider 1, the driving shovel base 3 sequentially passes through the shovel base perforation 21 and the shovel base linkage inclined hole 13, and the driving shovel base 3 and the shovel base linkage inclined hole 13 are in abutting fit through an inclined surface.

[0036] In order to play an elastic buffering role during the forward and backward sliding process, in this embodiment, a slide rod 14 is fixed to the rear end of the primary slider 1. The slide rod 14 passes through the secondary slider 2, a spring 15 is sleeved on the slide rod 14, and the spring 15 is clamped between the end cap 140 of the slide rod 14 and the rear end of the secondary slider 2.

[0037] The above is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention shall be included within the scope protected by the present invention.

Claims

1. A multi-directional secondary slider core-pulling mold structure, characterized in that: The invention comprises a primary slider (1), a secondary slider (2) and a driving shovel base (3); the secondary slider (2) is provided with a secondary slide groove (20) which runs through the front and rear ends thereof; the rear end of the primary slider (1) is arranged in the secondary slide groove (20), and the primary slider (1) and the secondary slide groove (20) are slidably matched; the driving shovel base (3) is arranged above the secondary slider (2); the driving shovel base (3) is used to drive the primary slider (1) to slide forward and backward; the front end of the primary slider (1) is formed with a workpiece forming surface (10); a core-pulling slider (4) is stacked above and / or below the primary slider (1); The core-pulling slider (4) can slide forward and backward relative to the primary slider (1), and the forward and backward sliding track of the core-pulling slider (4) is located on the radial extension line of the workpiece forming surface (10). The front end of the core-pulling slider (4) is provided with a forming pin rod (40) protruding toward the front side of the workpiece forming surface (10). The top surface and / or the bottom surface of the primary slider (1) are provided with a receiving groove (11) corresponding to the core-pulling slider (4) one by one. The rear end of the core-pulling slider (4) is formed with a movable limit block (41) protruding into the receiving groove (11), and the movable limit block (41) can move left and right relative to the receiving groove (11).

2. The multi-directional secondary slider core-pulling mold structure according to claim 1, characterized in that: A plurality of core-pulling sliders (4) are provided above and below the primary slider (1).

3. The multi-directional secondary slider core-pulling mold structure according to claim 1, characterized in that: The workpiece forming surface (10) is an inwardly concave arc surface, and the receiving groove (11) extends to a preset length along the tangent direction of the workpiece forming surface (10).

4. The multi-directional secondary slider core-pulling mold structure according to claim 2, characterized in that: The upper and lower sides of the primary slider (1) are provided with cover plates (5), and the primary slider (1) and the cover plates (5) are slidably matched with each other forward and backward. The cover plates (5) are provided with a plurality of guide grooves (50) on one side facing the primary slider (1), and the core-pulling sliders (4) are arranged in the guide grooves (50) one by one, and the core-pulling sliders (4) and the guide grooves (50) are slidably matched with each other.

5. The multi-directional secondary slider core-pulling mold structure according to claim 4, characterized in that: The primary slider (1) is provided with a plurality of limit sliding grooves (12), and the distribution of the plurality of limit sliding grooves (12) is perpendicular to the sliding direction of the primary slider (1). The cover plate (5) is fixed with a plurality of cover plate limit blocks (52), and the cover plate limit blocks (52) are arranged in the limit sliding grooves (12) in a one-to-one correspondence, and the cover plate limit blocks (52) can slide forward and backward relative to the limit sliding grooves (12).

6. The multi-directional secondary slider core-pulling mold structure according to claim 4, characterized in that: It comprises an inner molding die (6), the inner molding die (6) is fixed between two upper and lower cover plates (5), and the workpiece molding surface (10) is formed at the front end of the inner molding die (6).

7. The multi-directional secondary slider core-pulling mold structure according to claim 4, characterized in that: A radial limiting groove (51) is provided at the rear end of the guide groove (50), and the radial limiting groove (51) extends radially along the workpiece forming surface (10). A radial limiting block (42) is provided at the rear end of the core-pulling slider (4), and the radial limiting block (42) is arranged in the radial limiting groove (51) and the two are slidably matched.

8. The multi-directional secondary slider core-pulling mold structure according to claim 6, characterized in that: The upper and lower sides of the inner molding die (6) are respectively provided with a plurality of fixing slots (60); the cover plate (5) is provided with a plurality of fixing convex buckles (53) corresponding one to one with the fixing slots (60); the fixing convex buckles (53) are locked in the fixing slots (60).

9. The multi-directional secondary slider core-pulling mold structure according to claim 1, characterized in that: The secondary slider (2) is provided with a shovel base through hole (21), the primary slider (1) is provided with a shovel base linkage inclined hole (13), the driving shovel base (3) passes through the shovel base through hole (21) and the shovel base linkage inclined hole (13) in sequence, and the driving shovel base (3) and the shovel base linkage inclined hole (13) are abutted and matched via an inclined surface.

10. The multi-directional secondary slider core-pulling mold structure according to claim 1, characterized in that: A slide rod (14) is fixed to the rear end of the primary slider (1), the slide rod (14) passes through the secondary slider (2), a spring (15) is sleeved on the slide rod (14), and the spring (15) is clamped between the end cap (140) of the slide rod (14) and the rear end of the secondary slider (2).

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