A front mold oil cylinder core pulling structure

Abstract

The utility model relates to injection mold technical field especially relates to a front mould oil cylinder core -pulling structure, including oil cylinder, sliding block, sliding seat, dialing lever and elastic block, one end of sliding block is connected on oil cylinder, oil cylinder is used as power source for driving sliding block to make reciprocating motion, the other end of sliding block is connected with the end of sliding seat and slides, the lateral wall of sliding seat is equipped with the limit groove, one side of elastic block is placed in limit groove, one end of dialing lever is connected on the lateral wall of sliding block, the other end of dialing lever is connected between sliding seat and elastic block and slides, the end of dialing lever is provided with the inclined plane of direction, the inclined plane of direction and the bottom of elastic block abut. The present application has improved the problem of poor stability of front mould oil cylinder core -pulling mould.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to a front mold cylinder core-pulling structure. Background Technology

[0002] In the field of mold design, the front mold cylinder core-pulling structure is widely used to process injection molded products with undercut features or complex curved surface molding requirements. Traditional front mold cylinder core-pulling devices usually adopt a dual-cylinder redundancy design. That is, after the main core-pulling cylinder performs the core-pulling action, in order to prevent the sliding seat from shifting backward under the action of melt pressure during the injection process, an additional independent locking cylinder is required as a shovel base structure for secondary locking. This design pattern has the following technical drawbacks: First, the dual-cylinder configuration complicates the overall mold structure, increasing the cylinder installation space requirement by approximately 35%-40%, which can easily lead to spatial interference problems, especially in compact molds. Second, the auxiliary locking cylinder and its associated hydraulic pipeline system increase mold procurement costs by approximately 18%-25%, while also increasing the difficulty of coordinating hydraulic system debugging. Third, the increased number of moving parts directly leads to a larger cumulative tolerance; actual measurement data shows that the mold assembly accuracy decreases by approximately 0.02-0.05mm, directly affecting the stability of product molding dimensions. In addition, the timing of the main and auxiliary cylinders needs to be coordinated during the mold closing stage, extending the debugging cycle by 2-3 working days, and the coordinated operation of multiple moving parts increases the mold failure rate by approximately 12%-15%, significantly affecting mass production stability.

[0003] The front mold cylinder core-pulling structure is a commonly used structure in mold design, especially when dealing with products with undercuts or complex shapes. In traditional devices, to prevent the sliding seat from retracting, an additional cylinder is needed as a shovel base. This increases the mold processing and procurement costs, makes mold closing more difficult, increases the number of moving parts, and reduces mold stability. Utility Model Content

[0004] The technical problem to be solved by this utility model is the poor stability of the mold. In view of the above-mentioned defects of the prior art, a front mold oil cylinder core pulling structure is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A front mold hydraulic cylinder core-pulling structure includes a hydraulic cylinder, a slider, a sliding seat, a lever, and a spring block. One end of the slider is connected to the hydraulic cylinder, which serves as a power source to drive the slider to reciprocate. The other end of the slider is slidably connected to the end of the sliding seat. A limiting groove is formed on the side wall of the sliding seat, and one side of the spring block is placed in the limiting groove. One end of the lever is connected to the side wall of the slider, passes through the spring block, and the other end of the lever is slidably connected between the sliding seat and the spring block. A guide slope is provided at the end of the lever, and the guide slope abuts against the bottom of the spring block.

[0006] By adopting the above technical solution, the hydraulic cylinder serves as the power source. The output end of the hydraulic cylinder pushes the slider to move away from the sliding seat. A spring block is installed in the limiting groove on the sliding seat. The spring block interacts with the actuating rod through the guide inclined surface. When the actuating rod moves with the slider, the guide inclined surface on its side wall pushes the spring block to move. This realizes the action of core pulling by the slider, sliding seat and actuating rod under the drive of the hydraulic cylinder. The structure is compact and the movement is reliable. The cooperation between the spring block and the guide inclined surface increases the stability and accuracy of the movement. The design of the actuating rod makes the structure more flexible and can adapt to different movement requirements.

[0007] Preferably, a reset rod is connected to the end of the spring block away from the sliding seat, and a reset spring is sleeved on the reset rod.

[0008] By adopting the above technical solution, when the spring block is subjected to external force, the return spring will be compressed; when the external force disappears, the return spring will push the spring block back into the limiting groove; the introduction of the return spring increases the elasticity and adaptability of the structure, and can absorb and buffer external impacts to a certain extent, ensuring the stability and accuracy of the spring block after being subjected to external force; the spring block can also limit the position of the sliding seat, preventing the sliding seat from retracting, thereby ensuring product quality.

[0009] Preferably, the output end of the hydraulic cylinder is provided with a connecting part, the connecting part has a T-shaped cross-section, and the slider is provided with a connecting groove corresponding to the connecting part, the connecting groove being opened along the middle height direction of the slider.

[0010] By adopting the above technical solution, the output end of the hydraulic cylinder can be stably connected to the slider, ensuring the continuity and stability of the motion; the connection strength between the hydraulic cylinder and the slider is improved, making the structure more compact and stable, and improving the overall motion performance.

[0011] Preferably, a connecting rod is slidably connected to the end of the slider near the sliding seat. A sliding groove is provided on the side wall of the slider. One end of the connecting rod is located in the sliding groove, and the other end of the connecting rod is connected to the sliding seat. A limiting part is provided at the opening of the sliding groove, and the limiting part is used to limit the movement range of the connecting rod.

[0012] By adopting the above technical solution, a limiting part is set at the opening of the sliding groove to limit the movement range of the connecting rod. The connecting rod realizes a stable connection between the slider and the sliding seat. The setting of the limiting part ensures the movement range of the connecting rod and avoids interference and damage during the movement process.

[0013] Preferably, the slider has a mounting groove adapted to the toggle lever on its side wall near the toggle lever, one side of the toggle lever is located in the mounting groove, and locking grooves are correspondingly provided on the side walls of both the toggle lever and the slider. A locking block is installed in the locking groove, and the end of the locking block is connected to the slider.

[0014] By adopting the above technical solution, a stable connection and positioning between the lever and the slider is achieved. When the slider moves, the lever follows the slider because the locking block limits the lever. The design of the locking block increases the structural stability and reliability, and reduces the possibility of the lever becoming loose or falling off during movement.

[0015] Preferably, stabilizing blocks are provided on both sides of the slider, sliding portions are provided on both sides of the slider, and overlapping portions are provided on the stabilizing blocks, with the sliding portions and overlapping portions engaging with each other.

[0016] By adopting the above technical solution, the stabilizing block restricts both sides of the slider, improving the slider's stability and rigidity, making the slider more stable and reliable during sliding. The snap-fit ​​design between the sliding part and the overlapping part makes the structure more compact and easier to install and maintain.

[0017] Preferably, the guide slope has an arc-shaped transition section at its end, and the arc-shaped transition section forms a continuous contact surface with the side wall of the spring block; the bottom of the spring block has a positioning boss that fits with the limiting groove.

[0018] By adopting the above technical solution, the arc transition section can reduce the impact force of the contact between the toggle lever and the spring block, avoid rigid collision, and the gap fit between the positioning boss and the limiting groove ensures accurate alignment when the spring block is reset; thereby effectively reducing motion noise and component wear, extending service life, improving the reset accuracy of the spring block, and preventing locking failure caused by misalignment.

[0019] The beneficial effects of this utility model are as follows: 1. This application designs the linkage relationship between the hydraulic cylinder, slider, actuating rod, spring block, and sliding seat. During the core pulling operation, the hydraulic cylinder drives the slider to move away from the sliding seat, and the slider drives the actuating rod to move, thereby causing the guide slope to push the spring block upward to disengage from the limiting groove. During the mold closing process, the hydraulic cylinder pushes the slider to move closer to the sliding seat to complete the reset.

[0020] 2. This application provides a reset spring on the spring block. The reset spring can push the spring block back into the limiting groove, limit the position of the sliding seat, and prevent the sliding seat from moving backward, thereby ensuring product quality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of the front mold cylinder core-pulling structure in the embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the toggle lever in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Hydraulic cylinder; 11. Connecting part; 2. Slider; 21. Connecting groove; 22. Linking rod; 23. Sliding groove; 24. Limiting part; 25. Mounting groove; 26. Sliding part; 3. Sliding seat; 31. Limiting groove; 4. Spring block; 41. Reset rod; 42. Reset spring; 5. Actuating rod; 51. Guide slope; 52. Locking groove; 53. Locking block; 6. Stabilizing block; 61. Overlapping part. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, of the embodiments of this utility model. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The preferred embodiment of this utility model is as follows: Figure 1 As shown, a front mold cylinder core-pulling structure includes a cylinder 1, a slider 2, a sliding seat 3, a spring block 4, a toggle rod 5, and a stabilizing block 6.

[0026] One end of the slider 2 is connected to the oil cylinder 1, and the oil cylinder 1 is connected to the slider 2 as a power source. The other end of the slider 2 is slidably connected to the end of the sliding seat 3. A limit groove 31 is opened on the side wall of the sliding seat 3, and one side of the spring block 4 is placed in the limit groove 31. One end of the actuating rod 5 is connected to the side wall of the slider 2, the actuating rod 5 passes through the spring block 4, and the other end of the actuating rod 5 is slidably connected between the sliding seat 3 and the spring block 4. A guide slope 51 is provided at the end of the actuating rod 5, and the guide slope 51 abuts against the bottom of the spring block 4.

[0027] Hydraulic cylinder 1 serves as the power source. Its output drives slider 2 to move away from sliding seat 3. The spring block 4 interacts with the actuating rod 5 via guide slope 51. As the actuating rod 5 moves with slider 2, the guide slope 51 on its sidewall pushes the spring block 4, causing it to move upwards and disengage from the limiting groove 31. This achieves the core-pulling action driven by hydraulic cylinder 1, involving slider 2, sliding seat 3, and actuating rod 5. The structure is compact and the movement is reliable. The interaction between spring block 4 and guide slope 51 increases the stability and accuracy of the movement. The design of the actuating rod 5 makes the structure more flexible and adaptable to different movement requirements. During mold closing, hydraulic cylinder 1 pushes slider 2 towards sliding seat 3 to complete the reset.

[0028] The output end of the hydraulic cylinder 1 is provided with a connecting part 11. The cross-section of the connecting part 11 is T-shaped. The slider 2 is provided with a connecting groove 21 corresponding to the connecting part 11. The connecting groove 21 is opened along the middle height direction of the slider 2.

[0029] This ensures that the output end of the hydraulic cylinder 1 can be stably connected to the slider 2, guaranteeing the continuity and stability of the motion; it also improves the connection strength between the hydraulic cylinder 1 and the slider 2, making the structure more compact and stable, thereby improving the overall motion performance.

[0030] The end of the spring block 4 away from the sliding seat 3 is connected to a reset rod 41, and a reset spring 42 is sleeved on the reset rod 41.

[0031] When the spring block 4 is subjected to external force, the return spring 42 will be compressed; when the external force disappears, the return spring 42 will push the spring block 4 back into the limiting groove 31; the introduction of the return spring 42 increases the elasticity and self-adaptability of the structure, and can absorb and buffer external impacts to a certain extent, ensuring the stability and accuracy of the spring block 4 after being subjected to external force; the spring block 4 can also limit the position of the sliding seat 3, preventing the sliding seat 3 from retracting, thereby ensuring product quality.

[0032] A connecting rod 22 is slidably connected to the end of the slider 2 near the sliding seat 3. A sliding groove 23 is provided on the side wall of the slider 2. One end of the connecting rod 22 is located in the sliding groove 23, and the other end of the connecting rod 22 is connected to the sliding seat 3. A limiting part 24 is provided at the opening of the sliding groove 23 to limit the movement range of the connecting rod 22. A mounting groove 25 adapted to the toggle rod 5 is provided on the side wall of the slider 2 near the toggle rod 5. One side of the toggle rod 5 is located in the mounting groove 25. Locking grooves 52 are provided on the side walls of both the toggle rod 5 and the slider 2. A locking block 53 is installed in the locking groove 52, and the end of the locking block 53 is connected to the slider 2.

[0033] The linkage 22 achieves a stable connection between the slider 2 and the sliding seat 3. The limiting part 24 ensures the range of motion of the linkage 22. During the core-pulling operation, the linkage 22 and the limiting part 24 work together to limit the direction and distance of movement of the slider 2. A stable connection and positioning between the actuating rod 5 and the slider 2 is achieved. When the slider 2 moves, the locking block 53 limits the movement of the actuating rod 5, causing it to follow the slider 2, ensuring stable installation and reducing the likelihood of the actuating rod 5 wobbling during movement.

[0034] Stabilizing blocks 6 are provided on both sides of slider 2, sliding parts 26 are provided on both sides of slider 2, and overlapping parts 61 are provided on stabilizing blocks 6. The sliding parts 26 and overlapping parts 61 are interlocked with each other.

[0035] The stabilizing block 6 restricts both sides of the slider 2, improving the stability and rigidity of the slider 2, making the slider 2 more stable and reliable during sliding. The snap-fit ​​design between the sliding part 26 and the overlapping part 61 makes the structure more compact and easier to install and maintain.

[0036] An arc-shaped transition section is provided at the end of the guide slope 51, and the arc-shaped transition section forms a continuous contact surface with the side wall of the spring block 4; the bottom of the spring block 4 is provided with a positioning boss that fits with the limiting groove 31 with clearance.

[0037] The arc-shaped transition section can reduce the impact force when the toggle lever 5 contacts the spring block 4, avoid rigid collision, and the positioning boss and the limiting groove 31 are in clearance fit to ensure that the spring block 4 is accurately aligned when it is reset; thus, it can effectively reduce motion noise and component wear, extend service life, improve the reset accuracy of the spring block 4, and prevent locking failure caused by offset.

[0038] The implementation principle of a core-pulling product using a front mold cylinder 1 in this application embodiment is as follows: During the core-pulling process, the output end of the cylinder 1 drives the slider 2 to move linearly; when the slider 2 moves, it pushes the sliding seat 3 to move in coordination through the connecting rod 22; on the sliding seat 3, the spring block 4 contacts and cooperates with the guide slope 51 on the actuating rod 5 through its side wall. When the actuating rod 5 moves with the slider 2, the guide slope 51 on the side wall of the actuating rod 5 will push the spring block 4 to slide or rotate in the limiting groove 31, thereby realizing a specific core-pulling action.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A front mold hydraulic cylinder core-pulling structure, characterized in that, The device includes a hydraulic cylinder, a slider, a sliding seat, a lever, and a spring block. One end of the slider is connected to the hydraulic cylinder, which serves as a power source to drive the slider to reciprocate. The other end of the slider is slidably connected to the end of the sliding seat. A limiting groove is formed on the side wall of the sliding seat, and one side of the spring block is placed in the limiting groove. One end of the lever is connected to the side wall of the slider, passes through the spring block, and the other end of the lever is slidably connected between the sliding seat and the spring block. A guide slope is provided at the end of the lever, and the guide slope abuts against the bottom of the spring block.

2. The front mold cylinder core-pulling structure according to claim 1, characterized in that, The end of the spring block away from the sliding seat is connected to a reset rod, and a reset spring is sleeved on the reset rod.

3. The front mold cylinder core-pulling structure according to claim 1, characterized in that, The output end of the hydraulic cylinder is provided with a connecting part, the cross-section of the connecting part is T-shaped, and the slider is provided with a connecting groove corresponding to the connecting part, the connecting groove being opened along the middle height direction of the slider.

4. The front mold cylinder core-pulling structure according to claim 3, characterized in that, The slider is slidably connected to a connecting rod at the end near the sliding seat. A sliding groove is provided on the side wall of the slider. One end of the connecting rod is located in the sliding groove, and the other end of the connecting rod is connected to the sliding seat. A limiting part is provided at the opening of the sliding groove, and the limiting part is used to limit the movement range of the connecting rod.

5. The front mold cylinder core-pulling structure according to claim 4, characterized in that, The slider has a mounting groove on its side wall near the actuating rod that is adapted to the actuating rod. One side of the actuating rod is located in the mounting groove. Both the actuating rod and the slider have corresponding locking grooves on their side walls. A locking block is installed in the locking groove, and the end of the locking block is connected to the slider.

6. The front mold cylinder core-pulling structure according to claim 5, characterized in that, The slider has stabilizing blocks on both sides, sliding parts on both sides, and overlapping parts on the stabilizing blocks. The sliding parts and overlapping parts are interlocked with each other.

7. The front mold cylinder core-pulling structure according to claim 1, characterized in that, The guide slope has an arc-shaped transition section at its end, which forms a continuous contact surface with the side wall of the spring block; the bottom of the spring block has a positioning boss that fits with the limiting groove.

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