CN220904018U - A core-pulling structure with multiple slides - Google Patents

Abstract

The utility model belongs to the field of dies, and provides a core pulling structure with multiple sliding blocks, which is used for forming angles Kong Daokou, straight hole back-off and inner groove back-off on the side wall of a workpiece, and comprises the following steps: the fixed die holder is symmetrically provided with a plurality of inclined guide posts and traction posts, the inclined guide posts are close to the middle part of the fixed die holder, and the traction posts are positioned at the periphery of the fixed die holder; the movable die holder is movably arranged below the fixed die holder, and a product cavity is formed between the fixed die holder and the movable die holder after the fixed die holder is attached to the movable die holder; and the molding seat is used for molding the straight hole back-off and is symmetrically arranged on the movable die holder. Compared with the prior art, the utility model has the advantages that when the angle Kong Daokou, the straight hole back-off and the inner groove back-off on the product can be formed by one-time injection molding through the forming seat, the driving block and the inclined sliding block, the workpiece can smoothly finish the demoulding action after the fixed die holder and the movable die holder are separated in a step-by-step core pulling mode, the stability is good, and the working efficiency is improved to some extent.

Description

A core-pulling structure with multiple slides

Technical Field

The utility model belongs to the field of molds, and in particular relates to a core-pulling structure with multiple slide blocks.

Background technique

With the rapid development of machinery, products have gradually become diversified, and how to quickly manufacture products with relatively complex molding structures has become a major problem.

Existing molds often use selective injection molding when molding products with complex structures, that is, workers use molds to injection mold one part of the structure on the product, and the other part is machined in subsequent steps. This method is not conducive to operation, and when the angle hole undercut 10, the straight hole undercut 11 and the inner groove undercut 12 shown in Figure 1 appear on the side structure of the product at the same time, due to the different angles and directions, the workpiece cannot be demolded directly after molding, and the workpiece is easily damaged during the demolding process, affecting the quality and pass rate of the workpiece. When the above-mentioned step-by-step processing method is used for manufacturing, it will also seriously affect the overall work efficiency.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: to propose a multi-slide core-pulling structure with a simple overall structure, which can ensure that the angle holes, straight holes and inner grooves on the product can be molded in one injection molding, and can smoothly complete the demolding action of the workpiece after the fixed mold base and the movable mold base are separated by a step-by-step core pulling method, and has good stability and improved work efficiency.

The utility model solves the technical problem by adopting a technical solution of proposing a multi-slider core-pulling structure for forming angle hole undercuts, straight hole undercuts and inner groove undercuts on the side wall of a workpiece, comprising: a fixed die seat, on which a plurality of inclined guide pillars and traction pillars are symmetrically distributed, the inclined guide pillars are close to the middle position of the fixed die seat, and the traction pillars are located at the periphery of the fixed die seat;

A movable mold base is movably arranged below the fixed mold base, and when the fixed mold base is fitted with the movable mold base, a product cavity is formed between the fixed mold base and the movable mold base;

A forming seat for forming the straight hole undercut, the forming seat being symmetrically arranged on the movable mold seat, a traction groove being arranged in the forming seat, a traction part being arranged on the traction column, the traction part being movably pressed against the traction groove to push the forming seat to approach or move away from the product cavity in the horizontal direction;

A driving block and an inclined slider are both movably arranged in the forming seat and movably engaged with each other, the driving block is used to form the angle hole undercut, the inclined slider is used to form the inner groove undercut, and the inclined guide column is movably inserted in the driving block, so that the driving block moves in an inclined direction relative to the forming seat, thereby driving the inclined slider to move in a horizontal direction along the side wall of the workpiece and disengage from the inner groove undercut;

When the fixed mold seat drives the inclined guide column and the traction column away from the movable mold seat, the inclined sliding block can be disengaged from the inner groove undercut due to the movement of the driving block in the inclined direction, and when the traction portion abuts against the forming seat, the forming seat, the driving block and the inclined sliding block synchronously move away from the formed workpiece in the horizontal direction.

In the above-mentioned core-pulling structure with multiple slide blocks, the driving block comprises:

An inclined moving block is movably arranged at one end of the forming seat close to the product cavity, the moving block is provided with an inclined guide hole, the inclined guide column is movably inserted in the inclined guide hole, and is used to drive the moving block to move along an inclined direction relative to the forming seat;

A traction block is connected to the bottom of the moving block and is movably engaged with the inclined sliding block. Both the traction block and the moving block are used to form the angle hole undercut, and when the traction block moves in an inclined direction relative to the forming seat, it is used to drive the inclined sliding block to move in a horizontal direction along the side wall of the workpiece and disengage from the inner groove undercut.

In the above-mentioned multi-slider core pulling structure, a first guide groove is formed on the forming seat, the bottom wall of the first guide groove is inclined, the moving block is movably engaged in the first guide groove, and can reciprocate along the inclined direction of the bottom wall of the first guide groove.

In the above-mentioned core pulling structure with multiple slide blocks, the forming seat is further provided with a second guide groove connected with the first guide groove, the bottom wall of the second guide groove is parallel to the bottom wall of the first guide groove, and the pulling block is movably clamped in the second guide groove.

In the above-mentioned core-pulling structure with multiple sliders, the inclined slider comprises:

An inclined connecting block is movably arranged in the second guide groove, a dovetail groove is formed on the side wall of the traction block, a dovetail block extends outward in the length direction of the connecting block, and the dovetail block is movably clamped in the dovetail groove;

The forming block and the guide block are respectively located at both ends of the connecting block, and the forming block and the guide block are arranged on the same side. The forming block is used to form the inner groove undercut and can move in the horizontal direction of the side wall of the product cavity to separate from the formed workpiece; the guide block is movably clamped in the second guide groove.

In the above-mentioned core-pulling structure with multiple slide blocks, a third guide groove is formed at the bottom of the second guide groove along its width direction, the third guide groove is arranged parallel to the side wall of the product cavity, and the guide block is movably engaged in the third guide groove.

In the above-mentioned core-pulling structure with multiple sliders, the pulling groove includes:

A vertical groove, which is arranged at the end of the molding seat away from the product cavity in the vertical direction, and the traction column is movably inserted in the vertical groove;

A first clearance groove is provided on the molding seat and is located on a side of the top of the vertical groove close to the product cavity, a first inclined surface is formed on the first clearance groove, a first driving surface is formed on the traction portion, and the first driving surface movably abuts against the first inclined surface, so that the molding seat approaches the product cavity in the horizontal direction;

A second clearance groove is arranged on the forming seat and is located on the side of the bottom of the vertical groove away from the product cavity. A second inclined surface is formed on the second clearance groove, and a second driving surface is formed on the traction part. The second driving surface movably abuts against the second inclined surface, so that the forming seat moves away from the product cavity in the horizontal direction.

In the above-mentioned core-pulling structure with multiple sliders, the traction column includes a mounting column and a vertical column, the mounting column is connected to the top end of the vertical column, a connecting hole is provided on the mounting column, the connecting hole is connected to the fixed mold seat through a fixing part, the traction part is connected to the bottom of the vertical column and is arranged at an angle thereto, the vertical column is movably inserted in the vertical groove, and the maximum stroke of the driving block moving along the inclined direction is less than or equal to the length distance of the vertical column in the vertical direction.

In the above-mentioned core-pulling structure with multiple sliders, a pressing plate and a movable block located at the bottom of the second guide groove are further provided in the forming seat, the pressing plate is pressed tightly on the movable block, a locking block is extended outwardly from the upper end surface of the movable block, a locking groove is provided at the bottom of the pulling block, and the locking block is movably clamped in the locking groove;

When the locking block is engaged in the locking groove, it is used to limit the movement of the traction block in the second guide groove; and the locking block can move relative to the pressure plate and shrink into the forming seat due to the squeezing of the bottom wall of the traction block, so that the traction block can reciprocate along the second guide groove.

In the above-mentioned multi-slider core-pulling structure, an installation groove is provided in the forming seat, and the installation groove is located at the bottom of the second guide groove and connected thereto. An elastic member is provided at the bottom of the installation groove, and the top end of the elastic member is connected to the bottom of the movable block.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The utility model discloses a multi-slider core-pulling structure. A forming seat for forming a straight hole undercut, a driving block for forming an angle hole undercut and an inclined sliding block for forming an inner groove undercut are arranged in the movable mold seat. After the workpiece is formed, during the separation process of the fixed mold seat and the movable mold seat, the driving block is driven by the inclined guide column to separate from the workpiece in an inclined direction. The driving block can simultaneously drive the inclined sliding block to separate from the inner groove undercut along the horizontal direction of the workpiece side wall. When the driving block and the inclined sliding block are completely separated, the traction part on the traction column abuts against the forming seat, thereby driving the forming seat and the driving block and the inclined sliding block on the forming seat to move away synchronously in the direction of the workpiece, ensuring that the workpiece can be smoothly demolded. The structure is relatively simple as a whole. While ensuring that the workpiece is injection molded, the mold can be demolded by a step-by-step core-pulling method, thereby improving stability, ensuring that subsequent workpieces can be smoothly demolded, and avoiding damage to the workpiece during demolding, which affects the quality and qualified rate. In addition, the core-pulling structure also improves the production efficiency of the workpiece.

(2) A dovetail block is obliquely arranged on the obliquely arranged connecting block, and the guide block on the oblique sliding block is movably engaged in the third guide groove, so that when the traction block is separated from the workpiece in an inclined posture along the second guide groove, the dovetail block can be driven by the dovetail groove to move along the length direction of the third guide groove, thereby ensuring that the oblique sliding block is separated from the side wall of the formed workpiece in the horizontal direction to the inner groove undercut, avoiding position interference between the formed workpiece and the forming block on the oblique sliding block and failing to demold smoothly, thereby improving the stability of the core pulling structure and ensuring that the quality of the workpiece is not affected.

(3) A pressure plate and a movable block are provided in the forming seat at the bottom of the second guide groove. The pressure plate serves to limit the movable block, and the locking block on the movable block can be movably inserted in the locking groove at the bottom of the traction block, so as to ensure that the traction block is located in the correct position and maintains stability when the workpiece is formed, thereby avoiding displacement of the traction block and affecting the quality of the workpiece forming. When the traction block moves, the movable block can rely on the elastic member to shrink into the forming seat, thereby ensuring the smoothness of the traction block during movement, which is beneficial to improving the efficiency of the core pulling structure during operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of a workpiece after injection molding of the present application;

FIG2 is a full cross-sectional view of a core-pulling structure with multiple sliders;

FIG3 is a view of the installation structure of the molding seat and the driving block on the movable mold seat;

FIG4 is a view of the installation structure between the driving block and the forming seat;

Figure 5 is a structural view of the traction block and the inclined slider when they are located in the forming seat;

FIG6 is a full cross-sectional view of FIG4;

FIG7 is an exploded view of the traction block and the inclined sliding block in FIG5;

FIG. 8 is a structural view of a traction column.

In the figure, 1, workpiece; 10, angle hole undercut; 11, straight hole undercut; 12, inner groove undercut;

2. Fixed die seat; 20. Oblique guide column; 21. Traction column; 210. Mounting column; 211. Mounting hole; 212. Vertical column; 22. Traction part; 220. First driving surface; 221. Second driving surface;

3. Moving mold base; 30. Product cavity;

4. Forming seat; 40. Traction groove; 400. Vertical groove; 401. First give way groove; 402. First inclined surface; 403. Second give way groove; 404. Second inclined surface; 41. First guide groove; 42. Second guide groove; 420. Third guide groove; 43. Pressing plate; 44. Movable block; 440. Locking block; 45. Mounting groove; 450. Elastic member;

5. driving block; 50. moving block; 500. oblique guide hole; 51. traction block; 510. dovetail groove; 511. locking groove;

6. Inclined slider; 60. Connecting block; 600. Dovetail block; 61. Forming block; 62. Guide block.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in FIGS. 1 to 8 , the utility model discloses a multi-slider core-pulling structure, which is used to form an angle hole undercut 10, a straight hole undercut 11 and an inner groove undercut 12 on the side wall of a workpiece 1, and comprises: a fixed die seat 2, on which a plurality of inclined guide pillars 20 and traction pillars 21 are symmetrically distributed, the inclined guide pillars 20 are close to the middle position of the fixed die seat 2, and the traction pillars 21 are located at the periphery of the fixed die seat 2; a movable die seat 3, which is movably arranged below the fixed die seat 2, and when the fixed die seat 2 and the movable die seat 3 are fitted, a product cavity 30 is formed between the fixed die seat 2 and the movable die seat 3; a forming seat 4 for forming the straight hole undercut 11, the forming seat 4 is symmetrically arranged on the movable die seat 3, a traction groove 40 is provided in the forming seat 4, a traction part 22 is provided on the traction column 21, and the traction part 22 movably abuts against the traction groove 40, Used to push the forming seat 4 to approach or move away from the product cavity 30 in the horizontal direction; the driving block 5 and the inclined sliding block 6 are movably arranged in the forming seat 4 and movably engaged with each other, the driving block 5 is used to form the angle hole undercut 10, and the inclined sliding block 6 is used to form the inner groove undercut 12, and the inclined guide column 20 is movably inserted in the driving block 5, so that the driving block 5 moves in the inclined direction relative to the forming seat 4, thereby driving the inclined sliding block 6 to move in the horizontal direction along the side wall of the workpiece 1 and disengage from the inner groove undercut 12; when the fixed mold seat 2 drives the inclined guide column 20 and the traction column 21 away from the movable mold seat 3, the inclined sliding block 6 can be disengaged from the inner groove undercut 12 due to the movement of the driving block 5 in the inclined direction, and when the traction portion 22 abuts against the forming seat 4, the forming seat 4, the driving block 5 and the inclined sliding block 6 are synchronously moved away from the formed workpiece 1 in the horizontal direction.

As shown in FIG1 , the side mechanism of the workpiece 1 to be formed in this scheme has angle hole undercuts 10, straight hole undercuts 11 and inner groove undercuts 12. In order to accurately form the workpiece 1, it is also necessary to ensure that the workpiece 1 can be smoothly demoulded after the mold is formed. Specifically, after the workpiece 1 is injection molded, the fixed mold seat 2 can drive the inclined guide column 20 and the traction column 21 away from the movable mold seat 3. During this process, the inclined guide column 20 will pre-drive the driving block 5 used for forming the angle hole undercut 10 to move in an inclined direction, and then disengage from the angle hole undercut 10 on the formed workpiece 1. Because the driving block 5 and the inclined slider 6 are movable, Therefore, during the demoulding process of the driving block 5, the inclined slide block 6 for forming the inner groove undercut 12 will be driven to move in the horizontal direction of the workpiece 1 after molding, and then the inclined slide block 6 will be separated from the inner groove undercut 12. When the driving block 5 and the inclined slide block 6 are respectively separated from the angle hole undercut 10 and the inner groove undercut 12 on the molded workpiece 1, the traction part 22 on the traction block 51 that is moving away is against the molding seat 4, and then the driving block 5 and the inclined slide block 6 are driven to synchronously move away from the molded workpiece 1 during the movement of the molding seat 4, ensuring that the ejector rod in the movable mold seat 3 can smoothly eject the workpiece 1. Therefore, the overall structure is relatively simple, and undercuts at different angles and directions on the workpiece 1 can be molded by one injection molding, and the driving block 5, the inclined slide block 6 and the molding seat 4 can be smoothly demoulded by sequentially pulling the core, which is convenient for workers to operate, and at the same time, it also improves the fluency and stability of the core pulling structure during the manufacturing of the workpiece 1, avoids damage to the workpiece 1 during demoulding, and affects the quality and qualified rate of the workpiece 1, and also improves the overall production efficiency of the workpiece 1.

The driving block 5 includes: an inclined moving block 50, which is movably arranged at one end of the forming seat 4 close to the product cavity 30, and the moving block 50 is provided with an inclined guide hole 500, and the inclined guide column 20 is movably inserted in the inclined guide hole 500 to drive the moving block 50 to move along the inclined direction relative to the forming seat 4; a traction block 51, which is connected to the bottom of the moving block 50 and is movably engaged with the inclined sliding block 6, and the traction block 51 and the moving block 50 are both used for forming the angle hole undercut 10, and when the traction block 51 moves along the inclined direction relative to the forming seat 4, it is used to drive the inclined sliding block 6 to move in the horizontal direction of the side wall of the workpiece 1 and disengage from the inner groove undercut 12.

As shown in FIGS. 2 to 6, after the workpiece 1 is injection molded in the product cavity 30 in FIG. 2, the fixed mold base 2 moves upward in the vertical direction, driving the inclined guide column 20 and the traction column 21 to move. The inclined guide column 20 can be used to push the moving block 50 with the inclined guide hole 500 to separate from the molded workpiece 1 in the inclined direction of FIG. 4. It should be noted that since the driving block 5 is used to form the angle hole undercut 10 on the workpiece 1, and the angle hole undercut 10 has a certain inclination angle, it is necessary for the moving block 50 and the traction block 51 to extend into or separate from the product cavity 30 in the inclined direction to facilitate the molding of the desired side wall structure shape of the workpiece 1. Similarly, since the traction block 51 is connected to the moving block 50, This traction block 51 will synchronously move away from the formed workpiece 1 along the inclined direction with the moving block 50, and during the movement of the traction block 51, it will drive the inclined sliding block 6 movably connected with it to move horizontally along the side wall of the workpiece 1. Then, in the process of the moving block 50 and the traction block 51 disengaging from the angle hole undercut 10, the inclined sliding block 6 can also gradually disengage from the inner groove undercut 12 during the horizontal movement along the side wall of the workpiece 1. While ensuring the accuracy of the inner groove undercut 12 on the workpiece 1 formed by the mold using the inclined sliding block 6, the linear movement of the inclined sliding block 6 can also ensure the stability of the inclined sliding block 6 when it is disengaged, thereby avoiding position interference between the formed workpiece 1 and the inclined sliding block 6 to affect the smoothness during demolding.

It should be noted that the inner groove undercut 12 is located on the side wall of the workpiece 1, as shown in Figure 1, and the open end of the inner groove undercut 12 is arranged along the horizontal direction of the side wall of the workpiece 1, as shown in Figure 5. This scheme utilizes the gap between the inclined slide block 6 and the molding seat 4 to form the inner groove undercut 12 on the side wall of the workpiece 1. Therefore, after the workpiece 1 is injection molded, the inclined slide block 6 needs to move to the right along Figure 5 to disengage from the inner groove undercut 12 of the workpiece 1 after molding, to ensure that the ejector rod in the movable mold seat 3 ejects the workpiece 1 smoothly from the movable mold seat 3, to avoid position interference between the workpiece 1 and the inclined slide block 6 and affect the smoothness and stability during demolding.

A first guide groove 41 is formed on the forming seat 4 , and the bottom wall of the first guide groove 41 is inclined. The moving block 50 is movably engaged in the first guide groove 41 and can reciprocate along the inclined direction of the bottom wall of the first guide groove 41 .

The inclination angle of the bottom wall of the first guide groove 41 is consistent with the inclination angle of the angle hole undercut 10 that needs to be formed on the workpiece 1. As shown in Figure 4, under the drive of the inclined guide column 20, the moving block 50 can be separated from the formed workpiece 1 along the length direction of the first guide groove 41, and the first guide groove 41 ensures the stability of the moving block 50 during the reciprocating movement. At the same time, the inclined bottom wall of the first guide groove 41 is used to enable the moving block 50 to accurately form the angle hole undercut 10 on the workpiece 1 during the movement along the inclined direction, and the moving block 50 is smoothly demolded after the workpiece 1 is formed, thereby avoiding deviation of the moving block 50 during the movement process and affecting the quality of the angle hole undercut 10 formed on the workpiece 1.

The forming seat 4 is further provided with a second guide groove 42 connected to the first guide groove 41 . The bottom wall of the second guide groove 42 is parallel to the bottom wall of the first guide groove 41 . The traction block 51 is movably engaged in the second guide groove 42 .

Similarly, the traction block 51 is connected to the moving block 50. As shown in Figures 5 and 6, the second guide groove 42 is located below the first guide groove 41. Since the traction block 51 and the moving block 50 are both used to form the angle hole undercut 10 on the workpiece 1, the bottom wall of the second guide groove 42 in this scheme is arranged parallel to the bottom wall of the first guide groove 41. In this way, when the moving block 50 moves in the first guide groove 41 and drives the traction block 51 to move in the second guide groove 42, the moving block 50 and the traction block 51 can simultaneously detach from the outside of the workpiece 1 along the same inclined direction, thereby improving the stability of the core pulling structure during movement. When the traction block 51 moves along the inclined direction of the bottom wall of the second guide groove 42, it can also drive the inclined slide block 6 to detach from the inner groove undercut 12 along the horizontal direction of the side wall of the workpiece 1, thereby achieving smoothness of the action connection during the mold demolding process, which is beneficial to improving the work efficiency of the mold when injecting the workpiece 1.

The inclined sliding block 6 includes: an inclined connecting block 60, which is movably arranged in the second guide groove 42, a dovetail groove 510 is formed on the side wall of the traction block 51, and a dovetail block 600 extends outward in the length direction of the connecting block 60, and the dovetail block 600 is movably engaged in the dovetail groove 510; a forming block 61 and a guide block 62 are respectively located at both ends of the connecting block 60, and the forming block 61 and the guide block 62 are arranged on the same side, the forming block 61 is used to form the inner groove undercut 12, and can move in the horizontal direction of the side wall of the product cavity 30 to separate from the formed workpiece 1; the guide block 62 is movably engaged in the second guide groove 42.

Specifically, as shown in Figure 7, a dovetail block 600 is formed outwardly on the left side wall of the inclined connecting block 60, and the right side wall of the traction block 51 has the same inclination angle as the connecting block 60, and the dovetail groove 510 on the right side wall of the traction block 51 is movably engaged with the dovetail block 600. Therefore, when the forming block 61 forms the required inner groove undercut 12 on the workpiece 1, the moving block 50 moves away from the product cavity 30 along the length direction of the second guide groove 42. Since the moving direction of the moving block 50 is set at an angle to the dovetail groove 510 and the dovetail block 600 movably engaged with the dovetail groove 510, the moving block 50 will inevitably pull the dovetail block 600 to move leftward along Figure 7 through the dovetail groove 510 during the movement process, thereby driving the forming block 61 to detach from the formed inner groove undercut 12 in a direction parallel to the side wall of the workpiece 1, thereby ensuring the smoothness of the core pulling process and avoiding the workpiece 1 from being affected by the position interference of the forming block 61 and affecting the normal demolding action.

A third guide groove 420 is formed at the bottom of the second guide groove 42 along its width direction. The third guide groove 420 is arranged parallel to the side wall of the product cavity 30 , and the guide block 62 is movably engaged in the third guide groove 420 .

In order to further improve the stability of the connecting block 60 during movement, a third guide groove 420 is provided at the bottom of the second guide groove 42 in the present solution. Unlike the second guide groove 42, the length direction of the third guide groove 420 is exactly perpendicular to the length direction of the second guide groove 42, and the length direction of the third guide groove 420 is arranged in parallel with the side wall with the inner groove undercut 12, that is, when the traction block 51 moves away from the workpiece 1 along the inclined direction of the second guide groove 42, it is movably engaged in the third guide groove 420 by relying on the guide block 62, so that the inclined sliding block 6 moves as a whole along the third guide groove 420, thereby ensuring that the forming block 61 on the connecting block 60 is smoothly separated from the inner groove undercut 12, avoiding the displacement deviation of the forming block 61 and causing the jamming phenomenon during demolding, improving the smoothness during demolding, and ensuring that the quality of the inner groove undercut 12 on the workpiece 1 after molding is not damaged.

A pressing plate 43 and a movable block 44 located at the bottom of the second guide groove 42 are also provided in the forming seat 4. The pressing plate 43 is pressed tightly on the movable block 44. A locking block 440 extends outward from the upper end surface of the movable block 44. A locking groove 511 is provided at the bottom of the traction block 51. The locking block 440 is movably engaged in the locking groove 511. When the locking block 440 is engaged in the locking groove 511, it is used to limit the movement of the traction block 51 in the second guide groove 42. The locking block 440 can move relative to the pressing plate 43 and shrink into the forming seat 4 due to the squeezing of the bottom wall of the traction block 51, so that the traction block 51 can reciprocate along the second guide groove 42.

As shown in Figures 6 and 7, the pressure plate 43 and the movable block 44 are located at the bottom of the second guide groove 42. When the traction block 51 and the moving block 50 extend into the product cavity 30 and form the angle hole 10 on the workpiece 1, as shown in Figure 6, the locking block 440 extending outward from the movable block 44 is clamped in the locking groove 511 at the bottom of the traction block 51. The cooperation between the locking block 440 and the locking groove 511 is used to ensure the stability of the traction block 51 and the moving block 50 when forming the workpiece 1, thereby avoiding the quality of the workpiece 1 from being affected. In this scheme, two locking grooves 511 are set at the bottom of the traction block 51. The two locking grooves 511 can ensure that the traction block 51 and the moving block 50 will not be displaced relative to the forming seat 4 when the workpiece 1 is formed and after being separated from the formed workpiece 1, thereby improving the stability of the structure.

The forming seat 4 is provided with a mounting groove 45 , which is located at the bottom of the second guide groove 42 and communicated therewith. An elastic member 450 is provided at the bottom of the mounting groove 45 , and the top end of the elastic member 450 is connected to the bottom of the movable block 44 .

Furthermore, in order to ensure the smoothness of the movement of the traction block 51 along the inclined direction of Figure 6, the present solution sets the movable block 44 to be retractable, that is, during the movement of the traction block 51, its bottom wall applies an extrusion force along the inside of the forming seat 4 to the locking block 440. Since an elastic member 450 is connected between the movable block 44 and the forming seat 4, the movable block 44 can be retracted into the forming seat 4 under the extrusion of the bottom wall of the traction block 51, thereby ensuring the smoothness of the movement of the traction block 51. When one of the locking grooves 511 on the bottom of the traction block 51 moves to the top of the movable block 44, the movable block 44 can rely on the elastic reset of the elastic member 450 to be clamped in the locking groove 511 again, thereby limiting the movement of the traction block 51 in the second guide groove 42, thereby ensuring that the traction block 51 can maintain stability when it is in the required position.

Preferably, as shown in Figure 6, the upper end surface of the pressure plate 43 is flush with the bottom wall of the second guide groove 42, ensuring that the traction block 51 is not affected by the pressure plate 43 during movement. At the same time, the right side of the pressure plate 43 is pressed tightly into the movable block 44, so that the upper end surface of the movable block 44 is also flush with the bottom wall of the second guide groove 42. The pressure plate 43 limits the distance that the locking block 440 extends into the second guide groove 42, thereby ensuring that the locking block 440 is clamped in the locking groove 511 at the same position each time, thereby improving the stability of the structure. The elastic member 450 in this solution can adopt compression springs, return springs, or other elastic members 450.

The traction groove 40 includes: a vertical groove 400, which is arranged at the end of the molding seat 4 away from the product cavity 30 in the vertical direction, and the traction column 21 is movably inserted in the vertical groove 400; a first give way groove 401, which is arranged on the molding seat 4 and is located at the top of the vertical groove 400 close to the product cavity 30. A first inclined surface 402 is formed on the first give way groove 401, and a first driving surface 220 is formed on the traction part 22. The first driving surface 220 movably abuts against the first inclined surface 402, so that the molding seat 4 is close to the product cavity 30 in the horizontal direction; a second give way groove 403, which is arranged on the molding seat 4 and is located at the bottom of the vertical groove 400 away from the product cavity 30. A second inclined surface 404 is formed on the second give way groove 403, and a second driving surface 221 is formed on the traction part 22. The second driving surface 221 movably abuts against the second inclined surface 404, so that the molding seat 4 is away from the product cavity 30 in the horizontal direction.

As shown in FIG. 2 and FIG. 6 , the first clearance groove 401 is located at the right side of the top of the vertical groove 400, and the second clearance groove 403 is located at the left side of the bottom of the vertical groove 400. Since the traction column 21 is vertically inserted in the vertical groove 400, the design of the first clearance groove 401 and the second clearance groove 403 reduces the contact area between the traction column 21 and the side wall of the vertical groove 400, thereby ensuring the smoothness of the traction column 21 in the vertical direction of the vertical groove 400, and avoiding the traction column 21 from getting stuck during the movement. The first clearance groove 401 and the second clearance groove 403 are respectively formed with a first inclined surface 402 and a second inclined surface 404. When the mold is in the state shown in FIG. 2 and the workpiece 1 is formed, when the fixed mold base 2 is away from the movable mold base 3, the traction column 21 drives the traction column 21 to move. The guide portion 22 moves in the vertical direction, and when the second driving surface 221 on the traction portion 22 abuts against the second inclined surface 404 in the second clearance groove 403, the forming seat 4 can be pushed to move leftward along Figure 2, thereby making the forming seat 4 and the driving block 5 and the inclined sliding block 6 located on the forming seat 4 away from the formed workpiece 1, ensuring that the ejector rod in the movable mold seat 3 can smoothly separate the workpiece 1 from the product cavity 30 of the movable mold seat 3. Similarly, when the fixed mold seat 2 and the movable mold seat 3 are closing the mold, the first driving surface 220 on the traction portion 22 can be used to abut against the first inclined surface 402 of the first clearance groove 401, thereby pushing the forming seat 4 to move to the position shown in Figure 2, thereby improving the stability of the core pulling structure during operation, and ensuring the quality and qualified rate of the formed workpiece 1.

Furthermore, since the traction column 21 and the vertical groove 400 are both arranged in the vertical direction, when the fixed mold seat 2 drives the traction column 21 to move, the traction column 21 does not exert a force on the forming seat 4 to move leftward along Figure 2. Only when the second driving surface 221 on the traction portion 22 abuts against the second inclined surface 404 on the second give way groove 403, the forming seat 4 will first move the movable mold seat 3. During the movement of the traction column 21 in the vertical groove 400, the driving block 5 and the inclined sliding block 6 in the forming seat 4 are performing the demolding action. Therefore, after the driving block 5 and the inclined sliding block 6 complete the demolding action, the traction portion 22 can be used to push the forming seat 4 to move, thereby completing the above-mentioned forming seat 4 and the driving block 5 and the inclined sliding block 6 located on the forming seat 4 to synchronously move away from the formed workpiece 1, so as to ensure the smoothness and stability of the subsequent demolding process of the workpiece 1.

The traction column 21 includes a mounting column 210 and a vertical column 212. The mounting column 210 is connected to the top of the vertical column 212. A connecting hole is provided on the mounting column 210. The connecting hole is connected to the fixed mold base 2 through a fixing part. The traction part 22 is connected to the bottom of the vertical column 212 and is set at an angle thereto. The vertical column 212 is movably inserted in the vertical groove 400, and the maximum stroke of the driving block 5 moving along the inclined direction is less than or equal to the length distance of the vertical column 212 in the vertical direction.

As shown in FIG. 2 and FIG. 8 , the traction column 21 is composed of a mounting column 210 and a vertical column 212. The mounting portion is connected to the fixed mold seat 2 through a fixing member using a connecting hole. The fixing member can be a screw or other fixing device to ensure the stability between the traction column 21 and the fixed mold seat 2. The purpose of setting the angle between the traction portion 22 and the vertical column 212 is to use the first driving surface 220 and the second driving surface 221 on the traction portion 22 to drive the molding seat 4 to move in different directions respectively, so as to ensure the smoothness of the process of the mold injection molding workpiece 1, which is beneficial to To improve the overall work efficiency, preferably, in this solution, the maximum stroke of the driving block 5 moving in the inclined direction is less than or equal to the stroke of the vertical column 212 moving in the vertical groove 400, that is, when the driving block 5 and the inclined sliding block 6 are completely separated from the angle hole undercut 10 and the inner groove undercut 12, the traction part 22 on the traction column 21 just or is about to abut against the forming seat 4, ensuring the smoothness of the movement connection of the core pulling structure during the step-by-step core pulling process. While ensuring the smooth demolding of the driving block 5, the inclined sliding block 6 and the forming seat 4, the work efficiency of the mold is also improved.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, in the present invention, the descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims (10)

1. A multi-slide core-pulling structure, used for forming angle hole undercuts, straight hole undercuts and inner groove undercuts on the side wall of a workpiece, characterized in that it includes: A fixed die seat, on which a plurality of inclined guide pillars and traction pillars are symmetrically distributed, wherein the inclined guide pillars are close to the middle of the fixed die seat, and the traction pillars are located at the periphery of the fixed die seat; A movable mold base is movably arranged below the fixed mold base, and when the fixed mold base is fitted with the movable mold base, a product cavity is formed between the fixed mold base and the movable mold base; A forming seat for forming the straight hole undercut, the forming seat being symmetrically arranged on the movable mold seat, a traction groove being arranged in the forming seat, a traction part being arranged on the traction column, the traction part being movably pressed against the traction groove to push the forming seat to approach or move away from the product cavity in the horizontal direction; A driving block and an inclined slider are both movably arranged in the forming seat and movably engaged with each other, the driving block is used to form the angle hole undercut, the inclined slider is used to form the inner groove undercut, and the inclined guide column is movably inserted in the driving block, so that the driving block moves in an inclined direction relative to the forming seat, thereby driving the inclined slider to move in a horizontal direction along the side wall of the workpiece and disengage from the inner groove undercut; When the fixed mold seat drives the inclined guide column and the traction column away from the movable mold seat, the inclined sliding block can be disengaged from the inner groove undercut due to the movement of the driving block in the inclined direction, and when the traction portion abuts against the forming seat, the forming seat, the driving block and the inclined sliding block synchronously move away from the formed workpiece in the horizontal direction. 2. A core-pulling structure with multiple slide blocks according to claim 1, characterized in that the driving block comprises: An inclined moving block is movably arranged at one end of the forming seat close to the product cavity, the moving block is provided with an inclined guide hole, the inclined guide column is movably inserted in the inclined guide hole, and is used to drive the moving block to move along an inclined direction relative to the forming seat; A traction block is connected to the bottom of the moving block and is movably engaged with the inclined sliding block. Both the traction block and the moving block are used to form the angle hole undercut, and when the traction block moves in an inclined direction relative to the forming seat, it is used to drive the inclined sliding block to move in a horizontal direction along the side wall of the workpiece and disengage from the inner groove undercut. 3. A core-pulling structure with multiple sliders according to claim 2, characterized in that a first guide groove is formed on the forming seat, the bottom wall of the first guide groove is inclined, the movable block is movably engaged in the first guide groove, and can reciprocate along the inclined direction of the bottom wall of the first guide groove. 4. A core-pulling structure with multiple slide blocks according to claim 3, characterized in that the forming seat is also provided with a second guide groove connected to the first guide groove, the bottom wall of the second guide groove is parallel to the bottom wall of the first guide groove, and the traction block is movably clamped in the second guide groove. 5. A core-pulling structure with multiple slide blocks according to claim 4, characterized in that the inclined slide block comprises: An inclined connecting block is movably arranged in the second guide groove, a dovetail groove is formed on the side wall of the traction block, a dovetail block extends outward in the length direction of the connecting block, and the dovetail block is movably clamped in the dovetail groove; The forming block and the guide block are respectively located at both ends of the connecting block, and the forming block and the guide block are arranged on the same side. The forming block is used to form the inner groove undercut and can be moved in the horizontal direction of the side wall of the product cavity to separate from the formed workpiece; the guide block is movably clamped in the second guide groove. 6. A multi-slider core pulling structure according to claim 5, characterized in that a third guide groove is formed at the bottom of the second guide groove along its width direction, the third guide groove is arranged parallel to the side wall of the product cavity, and the guide block is movably clamped in the third guide groove. 7. The core-pulling structure of a multi-slider according to claim 1, characterized in that the pulling groove comprises: A vertical groove, which is arranged at the end of the forming seat away from the product cavity in the vertical direction, and the traction column is movably inserted in the vertical groove; A first clearance groove is provided on the molding seat and is located on a side of the top of the vertical groove close to the product cavity, a first inclined surface is formed on the first clearance groove, a first driving surface is formed on the traction portion, and the first driving surface movably abuts against the first inclined surface, so that the molding seat approaches the product cavity in the horizontal direction; A second clearance groove is arranged on the forming seat and is located on the side of the bottom of the vertical groove away from the product cavity. A second inclined surface is formed on the second clearance groove, and a second driving surface is formed on the traction part. The second driving surface movably abuts against the second inclined surface, so that the forming seat moves away from the product cavity in the horizontal direction. 8. A core-pulling structure with multiple sliders according to claim 7, characterized in that the traction column includes a mounting column and a vertical column, the mounting column is connected to the top end of the vertical column, a connecting hole is provided on the mounting column, the connecting hole is connected to the fixed mold seat through a fixing part, the traction part is connected to the bottom of the vertical column and is arranged at an angle thereto, the vertical column is movably inserted in the vertical groove, and the maximum stroke of the driving block moving along the inclined direction is less than or equal to the length distance of the vertical column in the vertical direction. 9. A core-pulling structure with multiple sliders according to claim 4, characterized in that a pressure plate and a movable block located at the bottom of the second guide groove are further provided in the forming seat, the pressure plate is pressed tightly on the movable block, a locking block extends outward from the upper end surface of the movable block, a locking groove is provided at the bottom of the traction block, and the locking block is movably engaged in the locking groove; When the locking block is engaged in the locking groove, it is used to limit the movement of the traction block in the second guide groove; and the locking block can move relative to the pressure plate and shrink into the forming seat due to the squeezing of the bottom wall of the traction block, so that the traction block can reciprocate along the second guide groove. 10. A core-pulling structure with multiple sliders according to claim 9, characterized in that a mounting groove is provided in the forming seat, the mounting groove is located at the bottom of the second guide groove and is connected thereto, an elastic member is provided at the bottom of the mounting groove, and the top end of the elastic member is connected to the bottom of the movable block.