A composite core pulling structure for a mold

Abstract

This utility model discloses a composite core-pulling structure for molds, comprising a movable mold and a fixed mold joined together, and a main slide within the movable mold. The main slide contains a core-pulling assembly, which includes components for sequential core pulling: a first core-pulling component, comprising a movable front mold pin acting on the top of the workpiece; and a second core-pulling component, comprising a slidable pin holder, one end of which has an angled pin that mates with the sidewall of the workpiece. During the first mold opening, the front mold pin moves with the upper mold to complete core pulling, and simultaneously, the pin holder drives the angled pin to complete core pulling. During the second mold opening, the rear mold pin is driven by the ejector plate to complete core pulling. During the third mold opening, the guide post moves upward, causing the angled pin holder to retract, and simultaneously pulls the angled pin to complete core pulling. The guide post continues to drive the main slide to move backward to complete the entire core pulling process. This composite core-pulling structure allows for phased sequential control, ensuring precise and coordinated movement of each core-pulling component, avoiding interference, and improving the reliability and molding accuracy of the mold operation.

Description

Technical Field

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

[0002] In the mold manufacturing field, for workpieces with complex geometric features (such as precision plastic parts with deep cavity undercuts, multi-directional side concavities, or compound angle core pulling requirements), it is usually necessary to design multiple sets of mutually cooperating core pulling mechanisms to achieve accurate demolding.

[0003] Traditional solutions primarily rely on multiple independent hydraulic cylinder drive systems to achieve phased sequential core pulling through timing control, thereby avoiding motion interference and ensuring complete demolding of the molded part. However, this conventional method has significant limitations: on the one hand, using multiple independent hydraulic cylinders not only significantly increases the mechanical manufacturing cost and assembly complexity of the mold but also makes the layout of the hydraulic control system piping difficult; on the other hand, due to the strict motion timing requirements between each core pulling mechanism, system synchronization is difficult to guarantee, and timing deviations can easily cause mechanism interference, which not only affects the product molding quality but may also cause mechanical damage to critical mold components and shorten the mold's service life. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a composite core-pulling structure for molds, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a composite core-pulling structure for a mold, comprising a moving mold and a fixed mold joined together, and a main body slide disposed within the moving mold, wherein a core-pulling assembly is provided within the main body slide, and the core-pulling assembly comprises cores that are pulled sequentially.

[0006] The first core-pulling component includes a movable front mold pin that acts on the top of the workpiece;

[0007] The second core-pulling component includes a slidable needle-pulling seat, and one end of the needle-pulling seat is provided with an oblique needle that cooperates with the side wall of the workpiece.

[0008] The third core-pulling component includes a movable rear mold pull pin, which acts on the bottom of the workpiece;

[0009] The fourth core-pulling component includes a movable inclined core-pulling base, and the inclined core-pulling base is connected to an inclined core, and the inclined core is connected to the side wall of the workpiece.

[0010] Furthermore, both the inclined pull seat and the main slide are connected to guide posts, and the core is pulled out sequentially as the guide posts move.

[0011] Furthermore, a first lever is provided at the end of the front mold pin that is away from the workpiece, and the first lever is installed on the upper mold.

[0012] Furthermore, the end of the needle holder away from the oblique needle drawer is abutted by a back spade, one end of which extends out from the top of the main body.

[0013] Furthermore, a second push block is provided at the end of the rear mold pull pin away from the workpiece, and the second push block is connected to an ejector pin column.

[0014] Furthermore, the inclined drawer is provided with a first inclined insertion port, through which the guide post passes.

[0015] Furthermore, the main slide includes a first slide and a second slide located on both sides of the workpiece, and both the first slide and the second slide are provided with a second oblique insertion port, through which the guide post passes.

[0016] Furthermore, both the needle-drawing seat and the angled needle-drawing seat are provided with T-slots, and one end of the angled needle-drawing and the angled needle-drawing are inserted into the T-slots.

[0017] Furthermore, a needle holder is provided on both sides of the top of the slanted drawer, and an opening is provided on the slanted drawer for any slanted needle to pass through.

[0018] Furthermore, the opposite ends of the first and second rows both abut against the shovel base.

[0019] Furthermore, the guide post is tilted towards the shovel base.

[0020] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as shown in the above technical solution, during the first mold opening, the front mold pull pin moves with the upper mold to complete the core pulling, and simultaneously, the pull pin seat also drives the inclined pull pin to complete the core pulling; during the second mold opening, the rear mold pull pin is driven by the ejector plate to complete the core pulling; during the third mold opening, the guide post moves upward to drive the inclined pull pin to retract, and simultaneously pulls the inclined pull pin to complete the core pulling; the guide post continues to drive the main slide to move backward to complete the entire core pulling process. This composite core pulling structure allows for phased sequential control, ensuring precise and coordinated movement of each core pulling component, avoiding interference, and improving the reliability of mold operation and molding accuracy.

[0021] 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

[0022] Figure 1 This is a perspective view of Embodiment 1 of this utility model.

[0023] Figure 2 This is a top view of the side planed section of Embodiment 1 of this utility model.

[0024] Figure 3 This is a side view of the side planed section of Embodiment 1 of this utility model.

[0025] Figure 4 This is a schematic diagram of the core-pulling assembly of Embodiment 1 of this utility model.

[0026] Figure 5 This is a first-view view of the fourth core-pulling component of Embodiment 1 of this utility model.

[0027] Figure 6 This is a second-view illustration of the fourth core-pulling component of Embodiment 1 of this utility model.

[0028] Figure 7 This is a schematic diagram of the inclined drawer of Embodiment 1 of this utility model.

[0029] Figure 8 This is a top view of the oblique drawer of Embodiment 1 of this utility model.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 1. First lever block; 2. Backhoe; 3. Second lever block; 4. First oblique insertion port; 5. Second oblique insertion port; 6. T-slot; 7. Through port; 8. Shovel base;

[0032] Moving mold 10, main body slide 11, first slide 111, second slide 112;

[0033] Fixed mold 20;

[0034] Core-pulling assembly 30, first core-pulling component 31, front mold pin 311;

[0035] Second core-pulling component 32, pin-pulling seat 321, oblique pin-pulling component 322;

[0036] Third core-pulling component 33, rear mold pin-pulling component 331;

[0037] Fourth core-pulling component 34, slanted core-pulling seat 341, slanted core 342, guide post 343;

[0038] Upper mold 40;

[0039] 50mm pin. Detailed Implementation

[0040] Please refer to Figure 1-8 As shown, it illustrates the specific structure of a preferred first embodiment of the present invention, which is a composite core-pulling structure for a mold, including a moving mold 10 and a fixed mold 20 spliced ​​together, and a main body slide 11 disposed in the moving mold 10. The main body slide 11 is provided with a core-pulling assembly 30, which includes core-pulling components that are pulled sequentially.

[0041] The first core-pulling component 31 includes a movable front mold pin 311 that acts on the top of the workpiece;

[0042] The second core-pulling component 32 includes a slidable needle-pulling seat 321, and one end of the needle-pulling seat 321 is provided with an oblique needle-pulling 322 that cooperates with the side wall of the workpiece.

[0043] The third core-pulling component 33 includes a movable rear mold pull pin 331, which acts on the bottom of the workpiece.

[0044] The fourth core-pulling component 34 includes a movable inclined core-pulling seat 341, and the inclined core-pulling seat 341 is connected to an inclined core 342, and the inclined core 342 is connected to the side wall of the workpiece.

[0045] Both the inclined core-pulling seat 341 and the main slide 11 are connected to guide pillars 343, and the core is pulled sequentially as the guide pillars 343 move. During the first mold opening, the front mold core-pulling pin 311 moves with the upper mold to complete the core pulling, while the core-pulling seat 321 also drives the inclined core-pulling pin 322 to complete the core pulling. During the second mold opening, the rear mold core-pulling pin 331 is driven by the ejector plate to complete the core pulling. During the third mold opening, the guide pillars 343 move upwards, causing the inclined core-pulling seat 341 to retract, while simultaneously pulling the inclined core-pulling pin 342 to complete the core pulling. The guide pillars 343 continue to drive the main slide 11 to move backwards to complete the entire core pulling process. This composite core-pulling structure allows for phased sequential control, ensuring precise and coordinated movement of each core-pulling component, avoiding interference, and improving the reliability and molding accuracy of the mold operation.

[0046] For example, the end of the front mold core-pulling pin 311 furthest from the workpiece is provided with a first lever 1, which is mounted on the upper mold 40. Since the first lever 41 is rigidly connected to the upper mold 40, its movement directly drives the front mold core-pulling pin 311 to retract, so that it completes the demolding action of the top of the workpiece first. This structure uses the initial mold opening movement of the upper mold 40 to directly drive the front mold core-pulling, ensuring accurate core-pulling timing and reliable action, and avoiding interference with other core-pulling components.

[0047] For example, the end of the pin-pulling seat 321 away from the oblique pin-pulling needle 322 abuts against a back spade 2, one end of which extends from the top of the main body slide 11. During mold opening, the upper mold 40 moves the back spade 2 upwards synchronously, gradually separating it from the contact surface of the pin-pulling seat 321. This separation action releases the constraint on the pin-pulling seat 321, allowing it to smoothly retract the oblique pin-pulling needle 322 along a predetermined trajectory under the action of the mold opening force, thereby completing the lateral core-pulling action.

[0048] For example, the end of the rear mold ejector pin 331 away from the workpiece is provided with a second lever 3, and the second lever 3 is connected to the ejector pin 50. Since the second lever 3 is rigidly connected to the ejector pin 50, its movement directly drives the rear mold ejector pin 331 to retract, so that it completes the core-pulling and demolding action at the bottom of the workpiece.

[0049] For example, the inclined pull base 341 has a first inclined insertion port 4, through which the guide post 343 passes. During the mold opening process, as the guide post 343 moves upward, it generates an interaction force with the inner wall of the first inclined insertion port 4. Through the oblique component force, the inclined pull base 341 is pushed to move smoothly backward in the horizontal direction, ultimately achieving precise separation of the inclined pull 342 from the workpiece and completing the lateral core pulling action.

[0050] For example, the main slide 11 includes a first slide 111 and a second slide 112 located on both sides of the workpiece, and both the first slide 111 and the second slide 112 are provided with a second oblique insertion port 5, through which the guide post 343 passes. The first slide 111 and the second slide 112 are located on the left and right sides of the workpiece, and the first slide 111 and the second slide 112 can also move smoothly backward under the separation and pushing of the guide post 343, finally completing the core pulling.

[0051] Both the needle-pulling seat 321 and the oblique needle-pulling seat 341 are provided with T-slots 6, and one end of the oblique needle-pulling 322 and the oblique needle-pulling 342 are inserted into the T-slots 6.

[0052] A slanted drawer 342 has a needle holder 321 on both sides of its top, and the slanted drawer 342 has an opening 7 for any slanted drawer needle 322 to pass through.

[0053] The opposite ends of the first row position 111 and the second row position 112 both abut against the shovel base 8.

[0054] The guide post 343 is inclined toward the shovel base 8.

[0055] In summary, the key design feature of this utility model is;

[0056] Front mold core pulling: The upper mold 40 drives the first push block 1 to move upward, directly pulling the front mold core 311 back, completing the demolding of the top of the workpiece.

[0057] Lateral core pulling (oblique needle pulling 322): The upper mold 40 synchronously drives the back spade 2 to move upward, and the contact surface between the back spade 2 and the needle pulling seat 321 gradually separates, releasing the constraint on the needle pulling seat 321; the needle pulling seat 321 slides along the T-slot 6 under the action of the mold opening force, driving the oblique needle pulling 322 to exit from the side wall of the workpiece.

[0058] Rear mold core pulling: Ejector pin 50 pushes the second lever 3, driving the rear mold core puller 331 to pull back, completing the demolding of the bottom of the workpiece.

[0059] The oblique pull seat 341 retracts: the guide post 343 passes through the first oblique insertion port 4, and its oblique component force pushes the oblique pull seat 341 to move horizontally backward, causing the oblique pull 342 to detach from the side wall of the workpiece.

[0060] Core pulling of main body slide 11: The guide post 343 continues to move upward, and drives the first slide 111 and the second slide 112 to move backward to both sides through the second oblique insertion port 5 (the shovel base 8 provides supporting reaction force), completing the final core pulling of both sides of the workpiece.

[0061] 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 composite core-pulling structure for a mold, comprising a movable mold (10) and a fixed mold (20) joined together, and a main body slide (11) disposed within the movable mold (10), characterized in that: The main row (11) is provided with a core-pulling assembly (30), which includes cores that are pulled out sequentially; The first core-pulling component (31) includes a movable front mold pin (311) that acts on the top of the workpiece; The second core-pulling component (32) includes a slidable needle-pulling seat (321), and one end of the needle-pulling seat (321) is provided with an oblique needle (322) that cooperates with the side wall of the workpiece. The third core-pulling component (33) includes a movable rear mold pull pin (331) that acts on the bottom of the workpiece. The fourth core-pulling component (34) includes a movable inclined core-pulling seat (341), and the inclined core-pulling seat (341) is connected to an inclined core (342), and the inclined core (342) is connected to the side wall of the workpiece. Both the inclined draw seat (341) and the main body slide (11) are connected to guide posts (343), and the core is drawn sequentially as the guide posts (343) move.

2. The composite core-pulling structure for a mold according to claim 1, characterized in that: The front mold drawing pin (311) is provided with a first push block (1) at the end away from the workpiece, and the first push block (1) is installed on the upper mold (40).

3. The composite core-pulling structure for a mold according to claim 1, characterized in that: The end of the needle holder (321) away from the oblique needle holder (322) is in contact with a back spade (2), and one end of the back spade (2) extends out from the top of the main body position (11).

4. The composite core-pulling structure for a mold according to claim 1, characterized in that: The rear mold ejector pin (331) is provided with a second push block (3) at the end away from the workpiece, and the second push block (3) is connected to an ejector pin (50).

5. A composite core-pulling structure for a mold according to claim 1, characterized in that: The inclined drawer (341) has a first inclined insertion port (4), and the guide post (343) passes through the first inclined insertion port (4).

6. A composite core-pulling structure for a mold according to claim 1, characterized in that: The main body slide (11) includes a first slide (111) and a second slide (112) located on both sides of the workpiece, and a second oblique insertion port (5) is provided on both the first slide (111) and the second slide (112), and the guide post (343) passes through the second oblique insertion port (5).

7. A composite core-pulling structure for a mold according to claim 1, characterized in that: Both the needle-drawing seat (321) and the oblique needle-drawing seat (341) are provided with T-slots (6), and one end of the oblique needle-drawing (322) and the oblique needle-drawing (342) are inserted into the T-slots (6).

8. A composite core-pulling structure for a mold according to claim 1, characterized in that: Each of the oblique drawers (342) has a needle holder (321) on both sides of its top, and the oblique drawer (342) has an opening (7) for any oblique drawer needle (322) to pass through.

9. A composite core-pulling structure for a mold according to claim 6, characterized in that: The opposite ends of the first row (111) and the second row (112) both abut against the shovel base (8).

10. A composite core-pulling structure for a mold according to claim 9, characterized in that: The guide post (343) is inclined toward the shovel base (8).

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