Secondary core-pulling mold for sliding block

Abstract

The utility model relates to the technical field of slide block secondary core-pulling molds, in particular to a slide block secondary core-pulling mold which comprises an L-shaped mounting plate, the mold further comprises a driving mounting plate, a special-shaped sliding plate, a lower sliding block, a hollow mold core, an inverted buckle groove, a spring and an inverted buckle shaping arc plate. The driving mounting plate is arranged at the top of the front side of the L-shaped mounting plate. According to the utility model, the four back-off shaping arc plates are pushed to be attached and form a circle by virtue of the characteristics of the four springs, and injection molding materials are shaped by virtue of the circle formed by the four back-off shaping arc plates during injection molding, so that back-off is formed on a model; the inverted buckles on the model can extrude the four inverted buckle shaping arc plates, at the moment, the four inverted buckle shaping arc plates can extrude the four springs and move towards the interiors of the inverted buckle grooves, and therefore the inverted buckles on the model cannot be subjected to excessive extrusion force when passing through the four inverted buckle shaping arc plates. And it is guaranteed that the inverted buckle position of the model cannot deform due to too large extrusion force during secondary core pulling.

Description

Technical Field

[0001] This utility model relates to the field of secondary core-pulling molds for sliders, and in particular to secondary core-pulling molds for sliders. Background Technology

[0002] With the development of industrial technology, the structure of injection molded products is becoming more and more complex. The traditional mold structure is increasingly unable to meet the ever-changing product requirements. When opening the injection mold, for products with long core pulling and high draft angle requirements, one-time core pulling cannot meet the product demolding requirements, and two-time core pulling must be used.

[0003] Common sliding block secondary core-pulling molds only include the function of secondary core pulling, which can pull out the mold core in two stages. However, they lack the function of preventing deformation. They cannot guarantee that the undercut of the mold will not deform due to excessive extrusion pressure during the secondary core pulling. This can easily lead to the undercut of the mold deforming due to excessive extrusion pressure during the secondary core pulling, affecting the quality of the finished product.

[0004] Therefore, to address the lack of anti-deformation function in the aforementioned slider secondary core-pulling mold, a slider secondary core-pulling mold can be designed. This mold utilizes the properties of four springs to push four undercut shaping arc plates together to form a circle. During injection molding, the circle formed by the four undercut shaping arc plates shapes the injection material, thus creating an undercut on the mold. When the hollow mold core moves upward for the second core-pulling, the undercut on the mold will press against the four undercut shaping arc plates. At this time, the four undercut shaping arc plates will press against the four springs and move towards the inside of the undercut groove. Therefore, the undercut on the mold will not be subjected to excessive pressure when passing the four undercut shaping arc plates, ensuring that the undercut of the mold will not deform due to excessive pressure during the second core-pulling. Utility Model Content

[0005] To overcome the common problem of sliding block secondary core pulling molds lacking anti-deformation function, which cannot guarantee that the undercut of the mold will not deform due to excessive extrusion pressure during secondary core pulling, the undercut of the mold is prone to deformation due to excessive extrusion pressure during secondary core pulling, which affects the quality of the finished product.

[0006] The technical solution of this utility model is as follows: a secondary core-pulling mold for a slider, including an L-shaped mounting plate; it also includes a drive mounting plate, a special-shaped sliding plate, a lower slider, a hollow mold core, an undercut groove, springs, and an undercut shaping arc plate. The drive mounting plate is provided at the top front side of the L-shaped mounting plate, the special-shaped sliding plate is provided on the left side of the top of the drive mounting plate, the lower slider is provided below the right side of the special-shaped sliding plate, the hollow mold core is provided at the bottom center of the lower slider, the undercut groove is provided at the bottom end of the inner side of the hollow mold core, four springs are symmetrically arranged on the four sides inside the undercut groove, and four undercut shaping arc plates are symmetrically arranged at the ends of the four springs away from the undercut groove.

[0007] Preferably, the four springs push four undercut shaping arc plates to fit together and form a circle. During injection molding, the circle formed by the four undercut shaping arc plates shapes the injection material, thus forming an undercut on the mold. When the hollow mold core moves upward for the second core pulling, the undercut on the mold will press against the four undercut shaping arc plates. At this time, the four undercut shaping arc plates will press against the four springs and move into the undercut groove. Therefore, the undercut on the mold will not be subjected to excessive pressure when passing the four undercut shaping arc plates, ensuring that the undercut of the mold will not deform due to excessive pressure during the second core pulling. This solves the problem of common slider secondary core pulling molds, which only include the function of secondary core pulling and can pull out the mold core in two stages, but lack the function of preventing deformation. They cannot guarantee that the undercut of the mold will not deform due to excessive pressure during the second core pulling, which easily leads to deformation of the undercut of the mold due to excessive pressure during the second core pulling, affecting the quality of the finished product.

[0008] Preferably, an upper slider is provided above the right side of the irregular sliding plate, a first T-shaped slider is provided to the left of the lower slider, and a second T-shaped slider is provided to the left of the upper slider.

[0009] Preferably, a first T-shaped groove is provided on the right side of the irregular sliding plate corresponding to the positions of the first T-shaped slider and the second T-shaped slider, and the first T-shaped slider and the second T-shaped slider are inserted into the interior of the first T-shaped groove.

[0010] Preferably, a solid mold core is provided at the center of the bottom of the upper slider, and the bottom end of the solid mold core passes through the lower slider and is inserted into the interior of the hollow mold core.

[0011] Preferably, a second T-shaped groove is provided on the front left side of the drive mounting plate, a drive slider is provided on the front left side of the drive mounting plate corresponding to the lower slider and the upper slider, and a third T-shaped slider is provided on the rear side of the drive slider, the third T-shaped slider is inserted into the interior of the second T-shaped groove.

[0012] Preferably, a first core-pulling groove is provided at the top of the front side of the drive slider, a second core-pulling groove is provided at the bottom of the front side of the drive slider, a second slide rod is provided at the rear side of the lower slider, a first slide rod is provided at the rear side of the upper slider, and the rear ends of the first slide rod and the second slide rod are respectively inserted into the interior of the first core-pulling groove and the second core-pulling groove.

[0013] Preferably, a cylinder is provided at the right end of the front side of the drive mounting plate, and a piston rod is provided inside the cylinder. The left end of the piston rod is connected to the drive slider.

[0014] The beneficial effects of this utility model are:

[0015] 1. Utilizing the properties of four springs, four undercut shaping arc plates are pushed together to form a circle. During injection molding, the circle formed by the four undercut shaping arc plates shapes the injection material, thus forming an undercut on the mold. When the hollow mold core moves upward for the second core pulling, the undercut on the mold will press against the four undercut shaping arc plates. At this time, the four undercut shaping arc plates will press against the four springs and move towards the inside of the undercut groove. Therefore, the undercut on the mold will not be subjected to excessive pressure when passing through the four undercut shaping arc plates, ensuring that the undercut of the mold will not deform due to excessive pressure during the second core pulling. This solves the problem of common slider secondary core pulling molds, which only include the function of secondary core pulling, allowing the mold core to be pulled out in two stages, but lack the function of preventing deformation. They cannot guarantee that the undercut of the mold will not deform due to excessive pressure during the second core pulling, which easily leads to deformation of the undercut of the mold due to excessive pressure during the second core pulling, affecting the quality of the finished product. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the slider secondary core-pulling mold of this utility model.

[0017] Figure 2 The diagram shown is a schematic representation of the slider secondary core-pulling mold drive assembly of this utility model.

[0018] Figure 3 The diagram shown is a schematic of the slider driving slider structure of the slider secondary core pulling mold of this utility model;

[0019] Figure 4 The diagram shown is a schematic representation of the irregular sliding plate structure of the slider secondary core-pulling mold of this utility model.

[0020] Figure 5 The diagram shown is a schematic diagram of the solid core structure of the slider secondary core-pulling mold of this utility model;

[0021] Figure 6 The diagram shown is a schematic representation of the hollow core structure of the slider secondary core-pulling mold of this utility model.

[0022] Figure 7 The diagram shown is a cross-sectional view of the hollow core of the slider secondary core-pulling mold of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. L-shaped mounting plate; 2. Drive mounting plate; 3. Irregular sliding plate; 4. Lower slider; 5. Hollow mold core; 6. Undercut groove; 7. Spring; 8. Undercut shaping arc plate; 9. First T-shaped slide groove; 10. First T-shaped slider; 11. Upper slider; 12. Solid mold core; 13. Second T-shaped slider; 14. Second T-shaped slide groove; 15. Drive slider; 16. Third T-shaped slider; 17. First core-pulling slide groove; 18. Second core-pulling slide groove; 19. First slide rod; 20. Second slide rod; 21. Cylinder; 22. Piston rod. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-7 This utility model provides an embodiment of a slider secondary core-pulling mold, including an L-shaped mounting plate 1; it also includes a drive mounting plate 2, a special-shaped sliding plate 3, a lower slider 4, a hollow mold core 5, an undercut groove 6, springs 7, and undercut shaping arc plates 8. The drive mounting plate 2 is provided at the top front side of the L-shaped mounting plate 1, the special-shaped sliding plate 3 is provided on the left side of the top of the drive mounting plate 2, the lower slider 4 is provided below the right side of the special-shaped sliding plate 3, the hollow mold core 5 is provided at the bottom center of the lower slider 4, the undercut groove 6 is provided at the bottom end of the inner side of the hollow mold core 5, four springs 7 are symmetrically arranged on the four sides inside the undercut groove 6, and four undercut shaping arc plates 8 are symmetrically arranged at the ends of the four springs 7 away from the undercut groove 6. The characteristics of the four springs 7 push the four undercut shaping arc plates 8 to stick together and form a circle. During injection molding, the four undercut shaping arc plates 8 are used to push the four undercut shaping arc plates 8 to stick together and form a circle. The formed circle shapes the injection molding material, thus forming an undercut on the mold. When the hollow mold core 5 moves upward for the second core pulling, the undercut on the mold will press against the four undercut shaping arc plates 8. At this time, the four undercut shaping arc plates 8 will press against the four springs 7 and move them into the undercut groove 6. Therefore, the undercut on the mold will not be subjected to excessive pressure when passing through the four undercut shaping arc plates 8, ensuring that the undercut of the mold will not deform due to excessive pressure during the second core pulling. This solves the problem of common slider secondary core pulling molds, which only include the function of secondary core pulling and can pull out the mold core in two stages, but lack the function of preventing deformation. They cannot guarantee that the undercut of the mold will not deform due to excessive pressure during the second core pulling, which easily leads to the undercut of the mold deforming due to excessive pressure during the second core pulling, affecting the quality of the finished product.

[0026] Please see Figures 2-7In this embodiment, a second T-shaped groove 14 is provided on the front left side of the drive mounting plate 2. A drive slider 15 is provided on the front left side of the drive mounting plate 2 corresponding to the positions of the lower slider 4 and the upper slider 11. A third T-shaped slider 16 is provided on the rear side of the drive slider 15. The third T-shaped slider 16 is inserted into the interior of the second T-shaped groove 14. A first core-pulling groove 17 is provided at the top front side of the drive slider 15, and a second core-pulling groove 18 is provided at the bottom front side of the drive slider 15. The lower slider 4... A second slide rod 20 is provided on the rear side of the upper slide block 11, and a first slide rod 19 is provided on the rear side of the upper slide block 11. The rear ends of the first slide rod 19 and the second slide rod 20 are respectively inserted into the interior of the first core-pulling groove 17 and the second core-pulling groove 18. A cylinder 21 is provided on the right end of the front side of the drive mounting plate 2. A piston rod 22 is provided inside the cylinder 21. The left end of the piston rod 22 is connected to the drive slide block 15. The injection mold is installed on the L-shaped mounting plate 1 at the positions corresponding to the hollow mold core 5 and the solid mold core 12. At this time, the hollow mold core 5 is installed on the L-shaped mounting plate 1. The core mold 5 and the solid mold core 12 are inserted together into the shaping hole of the injection mold. Then, the injection molding material is injected into the injection mold by an external injection molding machine. During injection, the injection material is shaped by the circle formed by four undercut shaping arc plates 8, thus forming an undercut on the mold. After injection is completed, the cylinder 21 is activated. The cylinder 21 pushes the drive slider 15 to move to the right through the piston rod 22. During the movement, when the bend of the first core-pulling slide groove 17 passes the first slide rod 19, the first slide rod 19... 9 moves upward along the first core-pulling groove 17. At this time, the first slide rod 19 drives the upper slide block 11 to move upward. The upper slide block 11 drives the solid mold core 12 and the second T-shaped slide block 13 to move upward at the same time. The second T-shaped slide block 13 moves upward along the first T-shaped groove 9 until the bottom end of the solid mold core 12 is separated from the injection mold. When the solid mold core 12 moves upward, the position of the bend of the second core-pulling groove 18 has not yet moved to the second slide rod 20. In this way, the first core-pulling operation is completed.

[0027] Please see Figures 1-7In this embodiment, an upper slider 11 is provided above the right side of the irregular sliding plate 3, a first T-shaped slider 10 is provided to the left of the lower slider 4, and a second T-shaped slider 13 is provided to the left of the upper slider 11. A first T-shaped groove 9 is provided on the right side of the irregular sliding plate 3 corresponding to the positions of the first T-shaped slider 10 and the second T-shaped slider 13. The first T-shaped slider 10 and the second T-shaped slider 13 are inserted into the interior of the first T-shaped groove 9. A solid mold core 12 is provided at the center of the bottom of the upper slider 11. The bottom end of the solid mold core 12 passes through the lower slider 4 and is inserted into the interior of the hollow mold core 5. After the first core pulling is completed, the cylinder 21 continues to push the drive slider 15 to move to the right through the piston rod 22. When the second core pulling groove 18 turns past the second slide rod 20, the second slide rod 20 moves upward along the second core pulling groove 18. At this time, the second slide rod 20... The lower slider 4 moves upward, which in turn moves the hollow mold core 5 and the first T-shaped slider 10 upward simultaneously. The first T-shaped slider 10 moves upward along the first T-shaped groove 9 until the bottom of the hollow mold core 5 separates from the injection mold, thus completing the second core-pulling operation. When the hollow mold core 5 moves upward for the second core-pulling, the undercut on the model will press against the four undercut shaping arc plates 8. At this time, the four undercut shaping arc plates 8 will press against the four springs 7 and move them into the undercut groove 6. Therefore, the undercut on the model will not be subjected to excessive pressure when passing through the four undercut shaping arc plates 8, ensuring that the undercut of the model will not deform due to excessive pressure during the second core-pulling. This achieves the function of preventing deformation and prevents the undercut of the model from deforming due to excessive pressure during the second core-pulling, which would affect the quality of the finished product.

[0028] During operation, the injection mold is installed on the L-shaped mounting plate 1 at the positions corresponding to the hollow mold core 5 and the solid mold core 12. At this time, the hollow mold core 5 and the solid mold core 12 are inserted into the shaping hole of the injection mold together. Then, the injection material is injected into the injection mold by an external injection molding machine. During injection, the injection material is shaped by the circle formed by four undercut shaping arc plates 8, thus forming an undercut on the mold. After injection is completed, the cylinder 21 is activated. The cylinder 21 pushes the drive slider 15 to move to the right through the piston rod 22. During the process, when the bend of the first core-pulling groove 17 passes the first sliding rod 19, the first sliding rod 19 moves upward along the first core-pulling groove 17. At this time, the first sliding rod 19 drives the upper sliding block 11 to move upward, and the upper sliding block 11 drives the solid mold core 12 and the second T-shaped sliding block 13 to move upward simultaneously. The second T-shaped sliding block 13 moves upward along the first T-shaped groove 9 until the bottom end of the solid mold core 12 disengages from the injection mold. When the solid mold core 12 moves upward, the position of the bend of the second core-pulling groove 18 has not yet moved to the first core-pulling groove 17. At the second slide rod 20, the first core-pulling operation is completed. After the first core-pulling is completed, the cylinder 21 continues to push the drive slider 15 to the right via the piston rod 22. When the second core-pulling groove 18 turns past the second slide rod 20, the second slide rod 20 moves upward along the second core-pulling groove 18. At this time, the second slide rod 20 drives the lower slider 4 to move upward, and the lower slider 4 drives the hollow mold core 5 and the first T-shaped slider 10 to move upward simultaneously. The first T-shaped slider 10 moves upward along the first T-shaped groove 9 until the hollow core 5 is reached. The bottom end of the hollow core 5 separates from the injection mold, thus completing the second core-pulling operation. When the hollow core 5 moves upward for the second core-pulling, the undercut on the model will press against the four undercut shaping arc plates 8. At this time, the four undercut shaping arc plates 8 will press against the four springs 7 and move into the undercut groove 6. Therefore, the undercut on the model will not be subjected to excessive pressure when passing through the four undercut shaping arc plates 8, ensuring that the undercut of the model will not deform due to excessive pressure during the second core-pulling, thus achieving the function of preventing deformation.

[0029] Through the above steps, the characteristics of the four springs 7 push the four undercut shaping arc plates 8 to stick together and form a circle. During injection molding, the circle formed by the four undercut shaping arc plates 8 shapes the injection material, thus forming an undercut on the model. When the hollow mold core 5 moves upward for the second core pulling, the undercut on the model will squeeze the four undercut shaping arc plates 8. At this time, the four undercut shaping arc plates 8 will squeeze the four springs 7 and move into the undercut groove 6. Therefore, the undercut on the model will not be subjected to excessive pressure when passing the four undercut shaping arc plates 8, ensuring that the undercut of the model will not deform due to excessive pressure during the second core pulling. This solves the problem of common slider secondary core pulling molds, which only include the function of secondary core pulling and can pull out the mold core in two parts, but lack the function of preventing deformation. They cannot guarantee that the undercut of the model will not deform due to excessive pressure during the second core pulling, which easily leads to the undercut of the model deforming due to excessive pressure during the second core pulling, affecting the quality of the finished product.

Claims

1. A slider secondary core-pulling mold, comprising an L-shaped mounting plate (1); characterized in that: It also includes a drive mounting plate (2), a special-shaped sliding plate (3), a lower slider (4), a hollow mold core (5), an undercut groove (6), a spring (7), and an undercut shaping arc plate (8). The drive mounting plate (2) is set on the top of the front side of the L-shaped mounting plate (1). The special-shaped sliding plate (3) is set on the left side of the top of the drive mounting plate (2). The lower slider (4) is set on the lower right side of the special-shaped sliding plate (3). The hollow mold core (5) is set at the bottom center of the lower slider (4). The undercut groove (6) is opened at the bottom of the inner side of the hollow mold core (5). Four springs (7) are symmetrically arranged on the four sides inside the undercut groove (6). Four undercut shaping arc plates (8) are symmetrically arranged on the ends of the four springs (7) away from the undercut groove (6).

2. The slider secondary core-pulling mold according to claim 1, characterized in that: An upper slider (11) is provided on the upper right side of the irregular sliding plate (3), a first T-shaped slider (10) is provided on the left side of the lower slider (4), and a second T-shaped slider (13) is provided on the left side of the upper slider (11).

3. The slider secondary core-pulling mold according to claim 2, characterized in that: The right side of the irregular sliding plate (3) is provided with a first T-shaped groove (9) corresponding to the position of the first T-shaped slider (10) and the second T-shaped slider (13), and the first T-shaped slider (10) and the second T-shaped slider (13) are inserted into the interior of the first T-shaped groove (9).

4. The slider secondary core-pulling mold according to claim 3, characterized in that: A solid mold core (12) is provided at the center of the bottom of the upper slider (11), and the bottom end of the solid mold core (12) passes through the lower slider (4) and is inserted into the interior of the hollow mold core (5).

5. The slider secondary core-pulling mold according to claim 4, characterized in that: The front left end of the drive mounting plate (2) is provided with a second T-shaped slide groove (14). The front left end of the drive mounting plate (2) is provided with a drive slider (15) corresponding to the lower slider (4) and the upper slider (11). The rear side of the drive slider (15) is provided with a third T-shaped slider (16). The third T-shaped slider (16) is inserted into the interior of the second T-shaped slide groove (14).

6. The slider secondary core-pulling mold according to claim 5, characterized in that: The top of the front side of the drive slider (15) is provided with a first core-pulling groove (17), the bottom of the front side of the drive slider (15) is provided with a second core-pulling groove (18), the rear side of the lower slider (4) is provided with a second slide rod (20), the rear side of the upper slider (11) is provided with a first slide rod (19), and the rear ends of the first slide rod (19) and the second slide rod (20) are respectively inserted into the interior of the first core-pulling groove (17) and the second core-pulling groove (18).

7. The slider secondary core-pulling mold according to claim 6, characterized in that: A cylinder (21) is provided on the right side of the front side of the drive mounting plate (2). A piston rod (22) is provided inside the cylinder (21). The left end of the piston rod (22) is connected to the drive slider (15).

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