A core-pulling structure of a mold

Abstract

The utility model discloses a core-pulling structure of mould, it includes the mould, the mould, the upper die and the glue runner of setting in mould that connect in proper order, the mould is divided into the first part of corresponding mould and the second part of corresponding upper die, is equipped with core-pulling assembly in the first part, and this core-pulling assembly includes the traction part of being equipped with in the first part and the second part connection, and one end extends to the slanted core-pulling of the glue runner inside can slide, when the first part and the second part separate, the traction part drives slanted core-pulling and carries out core-pulling.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a core-pulling structure for a mold. Background Technology

[0002] In the field of mold manufacturing, such as injection molding and die casting, plastic parts or castings often have complex structures such as side holes, grooves, and undercuts. These features cannot be directly demolded using a simple mold opening direction, so a core-pulling mechanism is required to achieve lateral parting or extraction. Traditional core-pulling structures mainly include inclined guide post core pulling, hydraulic (or pneumatic) core pulling, and slider core pulling. These methods are widely used in the industry, but they still have certain limitations.

[0003] Currently, the inclined guide post core-pulling structure relies on the mold opening and closing action for driving, which is simple in structure and low in cost. However, the core-pulling stroke and angle are limited, making it difficult to meet the needs of deep cavity, long-distance core pulling, or complex spatial angles. Although hydraulic or pneumatic core pulling can provide greater pulling force and flexible stroke control, it requires an additional hydraulic or pneumatic system, increasing the complexity of the mold and manufacturing cost, and has problems such as easy wear of seals and inconvenient maintenance. In addition, traditional slider core-pulling structures may face interference problems in compact space or multi-directional core pulling applications, leading to increased mold design difficulty and even affecting the accuracy and surface quality of the molded parts.

[0004] To address the aforementioned issues, some improvements have been proposed in the existing technology, such as using gear and rack transmission, linkage mechanism, or compound inclined plane structure. However, these solutions are often complex in structure, require high machining accuracy, or lack stability in actual production. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a core-pulling structure for a mold that solves the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a core-pulling structure for a mold, comprising a moving mold, a fixed mold, an upper mold, and a glue inlet channel connected in sequence. The fixed mold is divided into a first part corresponding to the moving mold and a second part corresponding to the upper mold. The first part is provided with a core-pulling assembly, which includes a traction part connected to the second part within the first part, and a slidable oblique puller extending one end into the glue inlet channel. When the first part and the second part are separated, the traction part drives the oblique puller to pull the core.

[0007] Furthermore, the traction unit includes a lever slidably disposed within the first part, a spring connected to the lever, and an oblique pull connected to the lower part of the lever.

[0008] Furthermore, the first part is provided with a receiving cavity for accommodating the lever, one end of the spring is fixed to the inner wall of the receiving cavity, and the other end is fixed to the lever, and the extension and retraction direction of the spring is consistent with the sliding direction of the lever.

[0009] Furthermore, the upper part of the lever is provided with a fastening opening, in which a pull buckle is fastened, and one end of the pull buckle extends into the second part and is connected thereto.

[0010] Furthermore, the fastening parts of the snap and the pull tab are mutually compatible beveled structures.

[0011] Furthermore, the lower end of the second part is provided with a pressure block, one end of which extends into the receiving cavity, and the position of the pressure block corresponds to the sliding direction of the push block.

[0012] Furthermore, the mold also includes a lower mold, which is located below the moving mold.

[0013] Furthermore, the mold opening sequence is: upper mold, second part, first part, and moving mold.

[0014] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the core-pulling assembly of this mold, through the cooperation of the traction part and the oblique pull, uses the upward movement of the second part (fixed mold plate) during mold opening to directly drive the oblique pull and the glue flow channel to separate and complete the core pulling, without the need for additional hydraulic or pneumatic devices, thereby reducing the complexity of the mold and the manufacturing cost.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a perspective view of Embodiment 1 of this utility model.

[0017] Figure 2 This is a cross-sectional view of Embodiment 1 of this utility model.

[0018] Figure 3 This is a first part of the illustration of Embodiment 1 of this utility model.

[0019] Figure 4 This is a diagram illustrating the receiving cavity of Embodiment 1 of this utility model.

[0020] Figure 5 This is a schematic diagram of the core-pulling assembly of Embodiment 1 of this utility model.

[0021] Explanation of reference numerals in the attached diagram: Dynamic model 11; Mold 12, first part 121, receiving cavity 121a, second part 122; Upper mold 13, injection channel 14, lower mold 15; Core-pulling assembly 20, traction part 21, lever block 211, fastening port 211a, spring 212, pull buckle 213, oblique pull 22, pressure block 23. Detailed Implementation

[0022] Please refer to Figure 1-5 As shown, this illustrates the specific structure of a preferred first embodiment of the present invention, which is a core-pulling structure for a mold. It includes a moving mold 11, a fixed mold 12, an upper mold 13, and a glue inlet channel 14 connected in sequence. The fixed mold 12 is divided into a first part 121 corresponding to the moving mold 11 and a second part 122 corresponding to the upper mold 13. A core-pulling assembly 20 is provided within the first part 121. This assembly includes a traction part 21 connected to the second part 122 within the first part 121, and a slidable oblique pull 22 extending one end into the glue inlet channel 14. When the first part 121 separates from the second part 122, the traction part 21 drives the oblique pull 22 to pull the core. The core-pulling assembly 20 of this mold, through the cooperation of the traction part 21 and the oblique pull 22, utilizes the upward movement of the second part 122 (fixed mold plate) during mold opening to directly drive the oblique pull 22 and the glue inlet channel 14 to complete the core pulling, eliminating the need for additional hydraulic or pneumatic devices, thereby reducing mold complexity and manufacturing costs.

[0023] Specifically, the traction part 21 is fixed to the second part 122 (fixed mold plate). When the mold is opened, the second part 122 moves upward, driving the traction part 21 to move synchronously. One end of the inclined pull 22 is slidably connected to the first part 121, and the other end extends to the glue inlet channel 14. Under the pull of the traction part 21, it slides out obliquely to realize core pulling. The withdrawal of the inclined pull 22 also drives the glue channel to detach, avoiding manual cleaning or additional ejection mechanism. This achieves the effect of eliminating external components such as oil cylinders and air cylinders, relying only on the mold opening power, thereby reducing production costs and increasing service life.

[0024] For example, the traction part 21 includes a lever 211 slidably disposed within the first part 121, a spring 212 connected to the lever 211, and an inclined pull 22 connected to the lower part of the lever 211. When the mold is opened, the second part 122 (fixed mold plate) moves upward, causing the lever 211 to slide, thereby causing the inclined pull 22 to be pulled out from the glue channel 14, completing the core pulling action. At the same time, the spring 212 provides rebound resistance to ensure the stable movement of the lever 211, prevent loosening or abnormal reset during the core pulling process, and ensure the reliability and consistency of the core pulling action.

[0025] For example, the first part 121 is provided with a receiving cavity 121a for accommodating the paddle 211. One end of the spring 212 is fixed to the inner wall of the receiving cavity 121a, and the other end is fixed to the paddle 211. The extension and retraction direction of the spring 212 is consistent with the sliding direction of the paddle 211. The opening of the receiving cavity 121a provides guidance and movement space for the paddle 211, enabling it to slide smoothly, thereby driving the inclined puller 22 to smoothly exit the glue inlet channel 14 and complete the core pulling action.

[0026] For example, the upper part of the push block 211 is provided with a fastening opening 211a, and a pull buckle 213 is fastened in the fastening opening 211a. One end of the pull buckle 213 extends into and connects to the second part 122. The pull buckle 213 is fixed on the second part 122. When the mold is opened, the pull buckle 213 can move upward with the second part 122 and drive the push block 211 to slide, so that the inclined pull 22 can smoothly exit the glue channel 14 and complete the core pulling action.

[0027] For example, the fastening portions of the latch 211a and the pull tab 213 are mutually adapted inclined structures. The inclined structure allows the pull tab 213 to automatically disengage from the latch 211a after moving upward with the second part 122 by a certain stroke, thereby effectively limiting the movement stroke of the lever 211 and preventing excessive displacement.

[0028] For example, the lower end of the second part 122 is provided with a pressure block 23, one end of which extends into the receiving cavity 121a, and the position of the pressure block 23 corresponds to the sliding direction of the push block 211. During mold closing, the push block 211, under the pressure of the pressure block 23, drives the inclined puller 22 to insert into the glue flow channel 14.

[0029] The mold also includes a lower mold 15, which is located below the moving mold 11.

[0030] For example, the mold opening sequence is upper mold 13, second part 122, first part 121, and moving mold 11. The mold opening is divided into four parts: first, the upper mold 13 moves upward, causing the feed channel 14 to separate; second, the second part 122 moves upward, causing the core-pulling gate to disengage; third, the first part 121 moves upward, the pull buckle 213 drives the push block 211 to retract, and drives the inclined pull 22 to pull the core, while the spring 212 can prevent the push block 211 from rebounding and pressing the mold; fourth, the moving mold 11 moves upward to eject the product, completing all actions.

[0031] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A core-pulling structure for a mold, comprising a moving mold (11), a fixed mold (12), an upper mold (13), and a glue inlet channel (14) connected in sequence, characterized in that: The fixed mold (12) is divided into a first part (121) corresponding to the moving mold (11) and a second part (122) corresponding to the upper mold (13). The first part (121) is provided with a core-pulling assembly (20). The core-pulling assembly (20) includes a traction part (21) located in the first part (121) and connected to the second part (122), and a slidable oblique pull (22) extending one end into the glue channel (14). When the first part (121) and the second part (122) are separated, the traction part (21) drives the oblique pull (22) to pull the core.

2. The core-pulling structure of a mold according to claim 1, characterized in that: The traction unit (21) includes a lever (211) slidably disposed in the first part (121), a spring (212) connected to the lever (211), and the inclined pull (22) connected to the lower part of the lever (211).

3. The core-pulling structure of a mold according to claim 2, characterized in that: The first part (121) is provided with a receiving cavity (121a) for accommodating the paddle (211). One end of the spring (212) is fixed to the inner wall of the receiving cavity (121a), and the other end is fixed to the paddle (211). The extension and retraction direction of the spring (212) is consistent with the sliding direction of the paddle (211).

4. The core-pulling structure of a mold according to claim 2, characterized in that: The upper part of the lever (211) is provided with a fastening opening (211a), and a pull buckle (213) is fastened in the fastening opening (211a), and one end of the pull buckle (213) extends into the second part (122) and is connected thereto.

5. The core-pulling structure of a mold according to claim 4, characterized in that: The fastening parts of the fastening opening (211a) and the pull buckle (213) are mutually compatible inclined structures.

6. The core-pulling structure of a mold according to claim 3, characterized in that: The second part (122) has a pressure block (23) at its lower end. One end of the pressure block (23) extends into the receiving cavity (121a), and the position of the pressure block (23) corresponds to the sliding direction of the lever (211).

7. The core-pulling structure of a mold according to claim 1, characterized in that: The mold also includes a lower mold (15), which is located below the moving mold (11).

8. The core-pulling structure of a mold according to claim 7, characterized in that: The mold opening sequence is upper mold (13), second part (122), first part (121) and moving mold (11).

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