Multi-directional linkage slider structure for irregular core pulling

Abstract

This utility model discloses a multi-directional linkage slider structure for irregularly shaped core pulling, belonging to the field of plastic injection molding technology. It includes a fixed mold with a molding cavity and a movable mold that cooperates with it. A sliding plate for forming the sidewall of the molding cavity is slidably disposed within the fixed mold. The sliding plate is connected to a transverse component, which includes a transverse rod and a first return spring for driving the transverse rod away from the molding cavity. It also includes a longitudinal component driven by the movable mold, which includes a longitudinal rod and a second return spring for driving the longitudinal rod to return to its original position. The longitudinal rod has a first inclined surface, and the transverse rod has a second inclined surface. Driven by the movable mold, the longitudinal and transverse rods move, thereby pushing the sliding plate towards the center of the molding cavity, thus closing the side cavity. This utility model provides a more compact and cost-effective side core pulling structure.

Description

Technical Field

[0001] This utility model relates to the field of plastic injection molding technology, and in particular to a multi-directional linkage slider structure for irregular core pulling. Background Technology

[0002] Plastic injection molding technology is one of the core processes used in modern manufacturing for the large-scale production of plastic products. In standard injection molding, the mold usually consists of two parts: a moving mold and a fixed mold. The molding and demolding of plastic parts can be completed through the mold opening and closing action and the ejection mechanism. However, with the increasing complexity of product design, many plastic parts have special structures such as grooves, holes, undercuts or bosses on their sides or inside. These structures make it impossible for the plastic parts to be easily demolded from the mold cavity after molding.

[0003] To address this issue, the industry has developed molds with lateral core-pulling mechanisms. For applications requiring significant core-pulling force or independent control of the core-pulling action, external hydraulic or pneumatic cylinders are typically used to directly drive the slider. While this method offers strong power and flexible control, it also has significant drawbacks. It requires the introduction of a complex hydraulic or pneumatic pipeline and control system, which not only significantly increases the manufacturing cost and structural complexity of the mold but also makes the overall size of the mold enormous. Furthermore, the hydraulic system poses a risk of oil leakage and contamination, affecting the workshop environment and product cleanliness. Utility Model Content

[0004] The purpose of this invention is to provide a more compact and cost-effective side-pulling structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-directional linkage slider structure for irregular core pulling, including a fixed mold with a forming cavity and a moving mold that cooperates with it, wherein a sliding plate for forming the side wall of the forming cavity is slidably arranged in the fixed mold, the sliding plate is connected to a transverse component, and the transverse component includes a transverse rod and a first return spring for driving the transverse rod away from the forming cavity. It also includes a longitudinal movement assembly driven by a moving mold, the longitudinal movement assembly including a longitudinal movement rod and a second return spring for driving the longitudinal movement rod to return to its original position; The longitudinal moving rod has a first inclined surface, and the transverse moving rod has a second inclined surface. Driven by the moving mold, the longitudinal moving rod and the transverse moving rod move, thereby pushing the slide plate to move towards the center of the forming cavity, and then closing the lateral cavity.

[0006] As a further description of the above technical solution: the transverse component also includes a support plate fixed in the fixed mold, the transverse rod is slidably inserted in the support plate, and a first reset spring is sleeved on the transverse rod, with its two ends respectively abutting between the flanges of the support plate and the transverse rod.

[0007] As a further description of the above technical solution: the longitudinal moving assembly also includes a mounting plate fixed in the fixed mold, the longitudinal moving rod slides through the mounting plate, and one end of the rod extends out of the fixed mold and contacts the moving mold, and the second return spring is sleeved on the longitudinal moving rod, with its two ends respectively abutting between the flanges of the mounting plate and the longitudinal moving rod.

[0008] As a further description of the above technical solution: it also includes a base, a mounting base fixed to the top of the base, and a fixed mold placed in the inner cavity of the mounting base.

[0009] As a further description of the above technical solution: the base is equipped with at least two lifting cylinders, the piston rods of the lifting cylinders are connected to the moving mold, and are used to drive the moving mold to move vertically up and down relative to the fixed mold.

[0010] As a further description of the above technical solution: it also includes an ejection assembly disposed below the fixed mold. The ejection assembly includes an ejection cylinder. A movable plate is fixedly installed on the telescopic end of the ejection cylinder. At least one ejection rod is fixed on the top of the movable plate. The top of the ejection rod passes through the fixed mold and can extend into the molding cavity.

[0011] As a further description of the above technical solution: the number of the slide plates is at least four, and their inner end faces together form the four side contours of the forming cavity.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The power source for lateral core pulling is combined with the mold's own opening and closing action. The vertical movement of the moving mold directly drives the longitudinal guide rod, and the inclined surfaces of the longitudinal and transverse guide rods convert the vertical movement into horizontal movement, driving the slide plate to complete core pulling and resetting. The entire linkage mechanism is built into the fixed mold, eliminating the need for long inclined guide pillars or external hydraulic cylinders as in traditional solutions. This greatly simplifies the external structure of the mold, making the overall mold design more compact and reducing the space requirements for the injection molding machine.

[0013] 2. The longitudinal and transverse guide rods are each equipped with independent return springs, ensuring that when the mold opens, the longitudinal guide rod first returns to its original position upwards, and then the transverse guide rod drives the slider to pull the core backwards under the action of the spring force. The timing of the actions is precise and they do not interfere with each other. The process is smooth and reliable, avoiding jamming. The entire core pulling action is seamlessly connected with the mold opening and closing and ejection process, realizing fully automated production and significantly improving production efficiency. Attached Figure Description

[0014] Figure 1 A front view of the present invention is shown; Figure 2 A cross-sectional view of the mold of this utility model is shown; Figure 3 A perspective view of the transverse and longitudinal moving components of this utility model is shown.

[0015] Legend: 10. Base; 11. Mounting seat; 12. Fixed mold; 13. Lifting cylinder; 14. Moving mold; 15. Slide plate; 16. Ejection cylinder; 17. Moving plate; 18. Ejection rod; 19. Support plate; 20. Horizontal movement rod; 201. Second inclined plane; 21. First return spring; 22. Mounting plate; 23. Longitudinal movement rod; 231. First inclined plane; 24. Second return spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3 This utility model provides a technical solution: a multi-directional linkage slider structure for irregular core pulling, including a base 10, an mounting seat 11 fixedly installed on the top of the base 10, and a fixed mold 12 placed in the inner cavity of the mounting seat 11. The fixed mold 12 is used to form part of the molding cavity of the plastic part.

[0018] Lifting cylinders 13 are symmetrically arranged on both sides of the mounting base 11. A moving mold 14 is installed at the end of the piston rod of the lifting cylinder 13. By controlling the inflation and deflation of the lifting cylinder 13, the moving mold 14 can be driven to achieve vertical lifting and lowering relative to the fixed mold 12, thereby completing the mold opening and closing action.

[0019] Furthermore, in order to achieve smooth ejection of the plastic part, an ejection assembly is also provided in the inner cavity of the mounting base 11. Specifically, the ejection assembly includes an ejection cylinder 16 installed on the bottom wall of the inner cavity of the mounting base 11. The telescopic end of the ejection cylinder 16 extends upward and is fixedly installed with a movable plate 17. Several ejection rods 18 are fixedly connected to the top of the movable plate 17. The ejection rods 18 pass through the mounting base 11 and the fixed mold 12 from bottom to top, and their upper end surfaces eventually extend into the molding cavity of the fixed mold 12. When the plastic part is formed, the ejection cylinder 16 is activated, driving the movable plate 17 and the ejection rods 18 to move upward, thereby ejecting the solidified plastic part from the cavity of the fixed mold 12.

[0020] Furthermore, the fixed mold 12 is provided with at least four sliding plates 15, which correspond to the four sides of the molding cavity respectively. The inner end faces of these sliding plates 15 together constitute the plastic parts, especially the side contours of irregular plastic parts, particularly those complex structures with side recesses or undercuts.

[0021] Each slide plate 15 is fixedly equipped with a set of transverse components to drive the slide plate 15 to move in the horizontal direction. At the same time, the fixed mold 12 is also provided with a longitudinal component that cooperates with the transverse component. The downward mold closing motion of the moving mold 14 can drive each slide plate 15 to move synchronously towards each other through the linkage of the longitudinal component and the transverse component, so as to complete the closure of the lateral cavity.

[0022] Specifically, the transverse component includes a support plate 19 fixed to the inner cavity of the fixed mold 12. The support plate 19 provides a stable mounting reference for the transverse component. A through hole is provided on the support plate 19, and a transverse rod 20 slides through the through hole. One end of the rod is fixedly connected to the back of the slide plate 15. A first return spring 21 is sleeved on the rod body of the transverse rod 20.

[0023] One end of the first return spring 21 abuts against the support plate 19, and the other end abuts against the flange on the transverse rod 20. In its natural state, the first return spring 21 is in a compressed or pre-tightened state, and its elastic force continuously drives the transverse rod 20 and the slide plate 15 connected to it to move in a direction away from each other, thereby realizing the lateral core pulling when the mold is opened.

[0024] The longitudinal movement assembly includes a mounting plate 22 fixed to the inner wall of the fixed mold 12. The mounting plate 22 also has a guide hole. A longitudinal movement rod 23 slides through the guide hole. The axis of the longitudinal movement rod 23 is perpendicular to the axis of the transverse movement rod 20. Its upper end passes through the top surface of the fixed mold 12 and extends to the outside of the mold so as to contact the lower bottom surface of the moving mold 14.

[0025] A second return spring 24 is also sleeved on the body of the longitudinal moving rod 23. One end of the second return spring 24 abuts against the mounting plate 22, and the other end abuts against the flange on the longitudinal moving rod 23. Its function is to use the elastic force to drive the longitudinal moving rod 23 to always maintain the upward movement trend when there is no external force.

[0026] Specifically, the bottom of the longitudinal moving rod 23 is provided with a first inclined surface 231, while the corresponding transverse moving rod 20 is machined with a second inclined surface 201. The two inclined surfaces have the same angle and fit together.

[0027] Workflow: The lifting cylinder 13 drives the moving mold 14 to move downward. The lower surface of the moving mold 14 contacts and presses down the upper end of the longitudinal moving rod 23, overcoming the elastic force of the second return spring 24, so that the longitudinal moving rod 23 moves vertically downward.

[0028] As the longitudinal rod 23 moves downward, the first inclined surface 231 at its bottom slides along the second inclined surface 201 at the end of the transverse rod 20. Due to the force decomposition effect of the inclined surface, the vertical movement of the longitudinal rod 23 is converted into a horizontal thrust on the transverse rod 20. This thrust overcomes the elastic force of the first return spring 21 and drives the transverse rod 20 and the slide plate 15 fixed thereto to move towards each other in the horizontal direction, that is, to move closer to the center of the mold. Finally, all slide plates 15 move to the preset molding position, and their inner end faces close together to form a complete lateral cavity, ready for injection molding.

[0029] After injection molding and cooling are completed, the lifting cylinder 13 drives the moving mold 14 to move upward and disengage from the longitudinal transfer rod 23. Under the elastic force of the second return spring 24, the longitudinal transfer rod 23 immediately returns to its original position. After losing the pushing limit of the longitudinal transfer rod 23, the transverse transfer rod 20, under the elastic force of the first return spring 21, drives the slide plate 15 to move away from each other, that is, to retreat towards the outside of the mold.

[0030] Once all the slide plates 15 have retracted into place, completing the core pulling process for all irregularly shaped side recesses or undercut structures of the plastic part, the bottom ejector cylinder 16 is activated, ejecting the now completely free plastic part from the fixed mold 12 via the ejector rod 18, thus completing a full work cycle.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-directional linkage slider structure for profile core-pulling, comprising a fixed mold (12) provided with a profiled cavity and a movable mold (14) matched with the fixed mold, characterized in that: The fixed mold (12) is slidably provided with a sliding plate (15) for forming the side wall of the molding cavity. The sliding plate (15) is connected to the transverse component. The transverse component includes a transverse rod (20) and a first return spring (21) for driving the transverse rod (20) away from the molding cavity. It also includes a longitudinal movement assembly driven by the moving mold (14), the longitudinal movement assembly including a longitudinal movement rod (23) and a second return spring (24) for driving the longitudinal movement rod (23) to reset. The longitudinal rod (23) is provided with a first inclined surface (231), and the transverse rod (20) is provided with a second inclined surface (201). Driven by the moving mold (14), the longitudinal rod (23) and the transverse rod (20) move, thereby pushing the slide plate (15) to move towards the center of the molding cavity, and then closing the lateral cavity.

2. The multi-directional linkage slide structure for off core according to claim 1, wherein: The transverse assembly also includes a support plate (19) fixed in the fixed mold (12), a transverse rod (20) slidingly passing through the support plate (19), and a first reset spring (21) sleeved on the transverse rod (20), with its two ends abutting against the flanges of the support plate (19) and the transverse rod (20) respectively.

3. The multidirectional linkage slide structure for off core according to claim 1, wherein: The longitudinal movement assembly also includes a mounting plate (22) fixed in the fixed mold (12), a longitudinal movement rod (23) slidingly passing through the mounting plate (22), with one end extending out of the fixed mold (12) and contacting the moving mold (14), and a second return spring (24) sleeved on the longitudinal movement rod (23), with its two ends abutting against the flanges of the mounting plate (22) and the longitudinal movement rod (23) respectively.

4. The multidirectional linkage slide structure for off core according to claim 1, wherein: It also includes a base (10), a mounting base (11) fixed to the top of the base (10), and a fixed mold (12) placed in the inner cavity of the mounting base (11).

5. The multi-directional linkage slider structure for profiled core-drawing according to claim 4, characterized in that: The base (10) is equipped with at least two lifting cylinders (13). The piston rod of the lifting cylinder (13) is connected to the moving mold (14) and is used to drive the moving mold (14) to move vertically up and down relative to the fixed mold (12).

6. The multidirectional linkage slide structure for off core according to claim 1, wherein: It also includes an ejection assembly located below the fixed mold (12). The ejection assembly includes an ejection cylinder (16). A movable plate (17) is fixedly installed on the telescopic end of the ejection cylinder (16). At least one ejection rod (18) is fixed on the top of the movable plate (17). The top of the ejection rod (18) passes through the fixed mold (12) and can extend into the molding cavity.

7. The multidirectional linkage slide structure for off core according to claim 1, wherein: The number of the slide plates (15) is at least four, and their inner end faces together form the four side profiles of the forming cavity.

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