Laminated sliding block core-pulling mechanism of injection mold

Abstract

The laminated sliding block core-pulling mechanism comprises a first power source, a second power source, a first sliding block and a second sliding block, the second sliding block is arranged on a movable mold plate in a sliding mode, the first sliding block is arranged above the second sliding block in a sliding mode, a plurality of first pitched roofs are arranged on the first sliding block in a penetrating mode, and a plurality of second pitched roofs are arranged on the second sliding block in a penetrating mode. When the first power source drives the first sliding block to move, the first pitched roofs are driven to transversely move for core pulling, and after the first sliding block finishes moving, the second power source drives the second sliding block to move for core pulling. Delayed core pulling of the second sliding block is achieved, and the situation that a product adheres to the sliding blocks during simultaneous core pulling is prevented; when the first sliding block moves, the three sets of first pitched roofs are driven to transversely move for core pulling, the first sliding block, the second sliding block and the first pitched roofs can be arranged to be in different inclined directions according to different needed core pulling directions, and the core pulling requirements of products in different directions and at different angles are met.

Description

Technical Field

[0001] The present invention relates to a laminated slider core-pulling mechanism for an injection mold, belonging to the technical field of injection molds. Background Art

[0002] In the field of air conditioner wall-mounted units, the air conditioner base product is one of the most important components of the air conditioner. When manufacturing the air conditioner base using the prior art, in order to reduce the number of the whole set of wall-mounted units and lower the cost, the base and the tongue strip are combined to mold together. However, at the same time, the product structure is relatively complex. Due to the complex product structure, there are many rib positions that need to be core-pulled after the product is injection-molded. At the same time, it is easy for the product to stick to the slider during core-pulling, and there are rib positions with different core-pulling angles, resulting in great difficulty in core-pulling. Summary of the Invention

[0003] The purpose of the present invention is to provide a laminated slider core-pulling mechanism for an injection mold that can prevent the product from sticking to the slider and achieve core-pulling at multiple angles, aiming at the shortcomings of the existing technology.

[0004] The technical solution adopted by the present invention to achieve the purpose is as follows: A laminated slider core-pulling mechanism for an injection mold includes a first power source, a second power source, a first slider, and a second slider. The second slider is slidably arranged on the moving template, the first slider is slidably arranged above the second slider, and a plurality of first lifters are penetrated through the first slider. When the first power source drives the first slider to move, the plurality of first lifters are driven to perform transverse core-pulling. After the first slider finishes moving, the second power source drives the second slider to move for core-pulling.

[0005] As a further optimization of the above technical solution: It further includes a third power source, a third slider, and a fourth slider. The second slider is located above the third slider, and the third slider is inclined and slidably arranged on the fourth slider. When the third power source drives the fourth slider to move backward, the third slider moves obliquely downward relative to the fourth slider for core-pulling.

[0006] As a further optimization of the above technical solution: A second lifter is penetrated through the second slider. A first spring and a mounting seat are arranged at the tail of the second lifter. The mounting seat is fixed on the second slider. Two ends of the first spring are respectively connected to the second lifter and the mounting seat. When in the mold-closing state, the first spring is in a compressed state. When the second slider moves, it drives the mounting seat to move backward synchronously, and the elastic force of the first spring is released, so that the head of the second lifter exposes the second slider and performs transverse core-pulling.

[0007] As a further optimization of the above technical solution: a stopper is installed on the side surface of the second inclined ejector pin; a limiting hole is formed in the second slider; the stopper is movably disposed in the limiting hole; when the stopper contacts the hole wall of the limiting hole, the second slider drives the second inclined ejector pin to move backward synchronously.

[0008] As a further optimization of the above technical solution: the first power source includes a plurality of first inclined guide posts; the second power source includes a plurality of second inclined guide posts; the ends of the first inclined guide posts and the second inclined guide posts are both connected to the fixed mold; a plurality of first inclined guide holes are formed in the first slider; the first inclined guide posts are inserted into the first inclined guide holes; the side surface of the first inclined guide post contacts the first guide hole wall on the first inclined guide hole; a plurality of second inclined guide holes are formed in the second slider; the second inclined guide posts are inserted into the second inclined guide holes; there is a distance between the side surface of the second inclined guide post and the second guide hole wall on the second inclined guide hole; when the mold is opened, the fixed mold drives the first inclined guide posts and the second inclined guide posts to move upward; when the first inclined guide posts move upward, they drive the first slider to move backward for core pulling; when the second inclined guide posts move upward to contact the second guide hole wall, the upward movement of the second inclined guide posts drives the second slider to move backward, so that the second slider moves backward relative to the first slider with a delay; when the second slider moves, the first slider and the first inclined ejector pin have both completed core pulling.

[0009] As a further optimization of the above technical solution: the second slider is inclined and disposed on the moving template; the first slider is inclined and disposed on the second slider; both the first slider and the second slider move obliquely upward.

[0010] As a further optimization of the above technical solution: a guide block is fixed on the second slider; the end of the guide block is bent to form a guide convex block; a chute is formed at the tail end of the rod part of the first inclined ejector pin; the guide convex block is located in the chute so that the first inclined ejector pin moves along the guide convex block.

[0011] As a further optimization of the above technical solution: there are three groups of the first inclined ejector pins in total, and the three groups of the first inclined ejector pins can be set to different inclined directions according to different core pulling directions required.

[0012] As a further optimization of the above technical solution: a guiding inclined surface is formed on the fourth slider, the third slider is slidably arranged on the guiding inclined surface, and a third lifter is further included. A moving cavity is formed on the third slider, the third lifter is slidably arranged in the moving cavity, a forming groove is formed on the side surface of the third lifter, and the forming groove constitutes a part of the cavity. A guiding groove is formed on the guiding inclined surface, and the bottom of the guiding groove is an ejector guiding surface. The inclination angle of the ejector guiding surface is smaller than that of the guiding inclined surface. The bottom surface of the third lifter is in contact with the ejector guiding surface. An inclined guiding slider is arranged on the side surface of the third lifter, and an inclined guiding chute is correspondingly arranged in the moving cavity. The guiding slider is located in the guiding chute. When the third slider moves obliquely downward along the guiding inclined surface, the third lifter is driven by the third slider and moves along the ejector guiding surface, and the third lifter gradually moves upward relative to the third slider; and under the guiding of the inclined guiding slider and the guiding chute, the third lifter gradually moves obliquely upward relative to the third slider, so that the product is separated from the forming groove.

[0013] As a further optimization of the above technical solution: an ejector pin is arranged in the third lifter, a second spring is sleeved on the ejector pin, a large ejector pin hole and a small ejector pin hole are formed in the third lifter, a spring step is formed between the large ejector pin hole and the small ejector pin hole, the ejector pin passes through the large ejector pin hole and the small ejector pin hole, a positioning block is arranged at the tail of the ejector pin, and the positioning block is fixed on the third slider. The two ends of the second spring respectively abut against the positioning block and the spring step. In the mold closing state, the end surface of the ejector pin and the bottom of the forming groove are on the same plane; during the mold opening and core pulling process, the third lifter moves obliquely upward relative to the third slider, and the end of the ejector pin gradually exposes from the third lifter to assist the product to be separated from the forming groove, and the second spring is compressed.

[0014] As a further optimization of the above technical solution: a spring mounting block is arranged on the side surface of the third lifter, the spring mounting block is fixed on the third slider, an inclined third spring is arranged on the spring mounting block, a spring groove is further formed on the third lifter, the end of the third spring is located in the spring groove, and the two ends of the third spring respectively abut against the bottom of the spring groove and the spring mounting block. The inclination angle of the third spring is the same as the moving angle of the third lifter obliquely upward. During the mold opening process, when the third lifter moves obliquely upward relative to the third slider, the third spring is compressed; during the mold closing process, the elastic force of the third spring is released and drives the third lifter to reset.

[0015] As a further optimization of the above technical solution: it further includes a bent sheath and a fourth inclined ejector. The bent sheath is fixedly inclined at the bottom of the fourth slider. The fourth inclined ejector slides through the bent sheath. A forming convex block capable of forming an undercut on the product is made on the top of the fourth inclined ejector. The fourth slider and the bent sheath move backward synchronously. Under the guidance of the inclined bent sheath, the fourth inclined ejector moves obliquely downward, so that the forming convex block disengages from the product.

[0016] As a further optimization of the above technical solution: a spring base is further fixed on the moving mold. A fourth spring is provided between the fourth inclined ejector and the spring base. When the fourth inclined ejector performs an oblique core-pulling operation, the fourth spring is compressed; when re-clamping the mold, the elastic force of the fourth spring is released to reset the fourth inclined ejector.

[0017] As a further optimization of the above technical solution: the third power source is a cylinder. The cylinder rod of the cylinder is connected to the fourth slider, and the cylinder drives the fourth slider to move backward; several nitrogen springs are further installed on the fourth slider, and the ends of the nitrogen springs abut against the third slider.

[0018] As a further optimization of the above technical solution: several guide sliders are fixed at the bottom of the third slider. Guide convex blocks are provided on both sides of the bottom of the guide slider. Several guide chutes are made on the guiding inclined surface. A guide groove is made in the middle of the guide chute. The bottom of the guide slider is located in the guide groove. Guide side blocks are provided on both sides of the guide slider. The guide side blocks are fixed on the guide chute. The side surface of the guide side block is located above the guide convex block, so that the guide slider is slidably installed in the guide chute.

[0019] Compared with the prior art, in the present invention, the first angled guide post and the second angled guide post drive the first slider and the second slider to move obliquely upward for core pulling respectively, and at the same time, the delayed core pulling of the second slider is realized, so that the undercuts on the first slider and the undercuts on the second slider are subjected to segmented core pulling, preventing the situation of the product sticking to the slider during simultaneous core pulling, which may cause product scratches and core pulling failure; when the first slider moves, the three groups of first angled lifters are driven to perform transverse core pulling, and when the second slider moves, the head of the second angled lifter exposes the second slider and performs transverse core pulling. The first slider, the second slider, the first angled lifter and the second angled lifter can all be set to different inclined directions according to the different required core pulling directions, meeting the core pulling requirements of the product in different directions and at different angles; the fourth slider is driven by a cylinder to move backward, and the third slider moves obliquely downward along the guiding inclined plane relative to the fourth slider for core pulling. At the same time, the third angled lifter gradually moves obliquely upward relative to the third slider for core pulling. At the same time, the fourth slider drives the curved sheath to move backward, so that the fourth angled lifter moves obliquely downward for core pulling. The movement of the fourth slider realizes the core pulling of the third slider, the third angled lifter and the fourth angled lifter in different directions and at different angles. The structure is compact, occupies little space, the transmission is simple and reliable, meeting the core pulling requirements of the product in different directions and at different angles, and realizing the core pulling of products with complex structures. Brief Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 is an exploded structural schematic diagram of the first slider 1, the second slider 2 and the structures thereon in the present invention.

[0022] Figure 3 is a three-dimensional structural schematic diagram of the third slider 4, the fourth slider 5 and the structures thereon in the present invention.

[0023] Figure 4 is an exploded structural schematic diagram of the third slider 4, the fourth slider 5 and the structures thereon in the present invention.

[0024] Figure 5 is a three-dimensional structural schematic diagram of the third angled lifter in the present invention.

[0025] In the figure, 1 is the first slider; 2 is the second slider; 21 is the second inclined guide hole; 22 is the second guide hole wall; 23 is the guide block; 231 is the guide convex block; 24 is the second lifter; 25 is the first spring; 26 is the mounting seat; 27 is the stop block; 3 is the first lifter; 31 is the sliding groove; 4 is the third slider; 41 is the moving cavity; 42 is the guide sliding groove; 43 is the guide slider; 431 is the guide sliding convex block; 5 is the fourth slider; 51 is the guide inclined surface; 511 is the guide sliding groove; 512 is the guide sliding groove; 52 is the lifter guide surface; 53 is the guide sliding side block; 54 is the nitrogen spring; 6 is the first inclined guide pillar; 7 is the second inclined guide pillar; 8 is the cylinder; 9 is the moving template; 10 is the third lifter; 101 is the spring step; 102 is the spring groove; 11 is the guide slider; 12 is the forming groove; 13 is the lifter ejector pin; 14 is the second spring; 15 is the positioning block; 16 is the spring mounting block; 17 is the third spring; 18 is the bent sheath; 19 is the fourth lifter; 191 is the forming convex block; 20 is the spring base. Detailed implementation mode

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes. As Figures 1-5 shown, the stacked slider core-pulling mechanism of the injection mold includes a first power source, a second power source, a first slider 1 and a second slider 2. The second slider 2 is slidably arranged on the moving template 9, and the first slider 1 is slidably arranged above the second slider 2. A plurality of first lifters 3 are arranged through the first slider 1. When the first power source drives the first slider 1 to move, the plurality of first lifters 3 are driven to move horizontally for core-pulling. After the first slider 1 finishes moving, the second power source drives the second slider 2 to move for core-pulling. It also includes a third power source, a third slider 4 and a fourth slider 5. The second slider 2 is located above the third slider 4. The third slider 4 is inclined and slidably arranged on the fourth slider 5. When the third power source drives the fourth slider 5 to move backward, the third slider 4 moves obliquely downward relative to the fourth slider 5 for core-pulling. The first slider 1, the first lifter 3, the second slider 2, the third slider 4 and the fourth slider 5 form part of the cavity.

[0027] In the above technical solution: The first power source includes a number of first inclined guide posts 6, and the second power source includes a number of second inclined guide posts 7. The ends of the first inclined guide posts 6 and the second inclined guide posts 7 are both connected to the fixed mold. A number of first inclined guide holes are formed on the first slider 1, and the first inclined guide posts 6 are inserted into the first inclined guide holes. The side surface of the first inclined guide post 6 is in contact with the first guide hole wall on the first inclined guide hole; a number of second inclined guide holes 21 are formed on the second slider 2, and the second inclined guide posts 7 are inserted into the second inclined guide holes 21. There is a distance between the side surface of the second inclined guide post 7 and the second guide hole wall 22 on the second inclined guide hole 21. When the mold is opened, the fixed mold drives the first inclined guide posts 6 and the second inclined guide posts 7 to move upward relative to the first slider 1 and the second slider 2. When the first inclined guide posts 6 move upward, they drive the first slider 1 to move backward for core pulling. At this time, since there is a distance between the side surface of the second inclined guide post 7 and the second guide hole wall 22 on the second inclined guide hole 21, the second inclined guide posts 7 will not drive the second slider 2 to move when they start to move upward; until the second inclined guide posts 7 move upward to contact the second guide hole wall 22, the upward movement of the second inclined guide posts 7 drives the second slider 2 to move backward, so that the second slider 2 moves backward relative to the first slider 1 with a delay; when the second slider 2 moves, the first slider 1 and the first ejector pin 3 have both completed core pulling. The delayed core pulling of the second slider 2 can realize the segmented core pulling of the undercuts on the first slider 1 and the undercuts on the second slider 2, preventing the situation of the product sticking to the slider during simultaneous core pulling, which may cause the product to be scratched and the core pulling to fail.

[0028] In the above technical solution: A guide block 23 is fixed on the second slider 2. The end of the guide block 23 is bent to form a guide convex block 231. A chute 31 is formed at the tail end of the rod part of the first ejector pin 3. The guide convex block 231 is located in the chute 31 to make the first ejector pin 3 move along the guide convex block 231, guiding the lateral movement process of the first ejector pin 3 relative to the first slider 1. The guide block 23 is fixed on the second slider 2 instead of the moving mold, reducing the rod length of the first ejector pin 3 and preventing the rod part of the first ejector pin 3 from being too long and easily causing fracture and damage. When the second slider 2 starts to move, the second slider 2 pulls the first ejector pin 3 and the first slider 1 to move synchronously through the guide block 23.

[0029] In the above technical solution: There are three groups of the first ejector pins 3 in total, and the three groups of the first ejector pins 3 can be set to different inclined directions according to different required core pulling directions.

[0030] In the above technical solution: The second slider 2 is inclined and arranged on the moving template 9, and the first slider 1 is inclined and arranged on the second slider 2. Both the first slider 1 and the second slider 2 move obliquely upward, as Figure 1 shown by the arrow direction in

[0031] In the above technical solution: A second lifter 24 is inserted into the second slider 2. A first spring 25 and a mounting seat 26 are provided at the tail of the second lifter 24. The mounting seat 26 is fixed on the second slider 2. Two ends of the first spring 25 are respectively connected to the second lifter 24 and the mounting seat 26. When the mold is closed, the first spring 25 is in a compressed state. When the second slider 2 moves, it drives the mounting seat 26 to move backward synchronously. The elastic force of the first spring 25 is released to prevent the second lifter 24 from moving backward synchronously with the second slider 2, so that the head of the second lifter 24 exposes from the second slider 2 and performs a lateral core-pulling operation. A stop block 27 is installed on the side of the second lifter 24. A limit hole is formed on the second slider 2. The stop block 27 is movably arranged in the limit hole. When the stop block 27 contacts the hole wall of the limit hole, the second slider 2 drives the second lifter 24 to move backward synchronously. The stop block 27 not only limits the core-pulling process of the second lifter 24, but also limits the reset process of the second lifter 24 to prevent the second lifter 24 from moving excessively and hitting the moving mold. Both the first lifter 3 and the second lifter 24 can be set to different inclined directions according to different required core-pulling directions. In this embodiment, the moving directions of each first lifter 3 and second lifter 24 are as Figure 2 shown by the arrow directions in (the arrows are located at the ends of each first lifter 3 and second lifter 24).

[0032] In the above technical solution: The third power source is a cylinder 8. The cylinder rod of the cylinder 8 is connected to the fourth slider 5. The cylinder 8 drives the fourth slider 5 to move backward. A plurality of nitrogen springs 54 are further installed on the fourth slider 5. The ends of the nitrogen springs 54 abut against the third slider 4. The nitrogen springs 54 play an auxiliary pushing role in the movement of the third slider 4 relative to the fourth slider 5.

[0033] In the above technical solution: the fourth slider 5 is provided with a guide slope 51, and the third slider 4 is slidably arranged on the guide slope 51. It also includes a third inclined top 10, the third slider 4 is provided with a moving cavity 41, the third inclined top 10 is slidably arranged in the moving cavity 41, and the side of the third inclined top 10 is provided with a molding groove 12, and the molding groove 12 constitutes a part of the molding cavity. A guide groove is provided on the guide slope 51, and the groove bottom of the guide groove is an inclined top guide surface 52, the inclination angle of the inclined top guide surface 52 is smaller than the inclination angle of the guide slope 51, and the bottom surface of the third inclined top 10 is in contact with the inclined top guide surface 52. An inclined guide slider 11 is provided on the side of the third inclined top 10, and an inclined guide groove 42 is correspondingly provided in the moving cavity 41, and the guide slider 11 is located in the guide groove 42. When the third slider 4 moves obliquely downward along the guide slope 51, the third inclined top 10 is driven by the third slider 4 and moves along the inclined top guide surface 52. Since the inclination angles of the inclined top guide surface 52 and the guide inclined surface 51 are different, the movement angle of the third slider 4 and the movement angle of the third inclined top 10 are different, and the third inclined top 10 gradually moves upward relative to the third slider 4; and under the guidance of the inclined guide slider 11 and the guide groove 42, the third inclined top 10 gradually moves obliquely upward relative to the third slider 4, so that the product is separated from the molding groove 12, thereby realizing the core pulling of the third inclined top 10.

[0034] In the above technical solution: a third inclined top 10 is provided with an inclined top elastic pin 13, and a second spring 14 is sleeved on the inclined top elastic pin 13. Figure 5 As shown, a large elastic pin hole and a small elastic pin hole are formed in the third inclined ejector 10, and a spring step 101 is formed between the large elastic pin hole and the small elastic pin hole. The inclined ejector pin 13 is inserted into the large elastic pin hole and the small elastic pin hole. A positioning block 15 is provided at the tail of the inclined ejector pin 13, and the positioning block 15 is fixed on the third slider 4. The two ends of the second spring 14 respectively contact the positioning block 15 and the spring step 101. In the mold closing state, the end face of the inclined ejector pin 13 and the bottom of the forming groove 12 are located on the same plane; during the mold opening and core pulling process, the third inclined ejector 10 moves obliquely upward relative to the third slider 4, and the end of the inclined ejector pin 13 gradually exposes the third inclined ejector 10, assisting the product to detach from the forming groove 12, and the second spring 14 is squeezed; when the mold is closed again, the elastic force of the second spring 14 is released to ensure that the third inclined ejector 10 and the inclined ejector pin 13 are reset in place. The inclined ejector pin 13 prevents the product from sticking to the third inclined ejector 10, ensuring smooth demolding of the product.

[0035] In the above technical solution: a spring mounting block 16 is provided on the side of the third inclined top 10, and the spring mounting block 16 is fixed on the third sliding block 4. A third spring 17 is provided on the spring mounting block 16. Figure 5As shown in the figure, a spring groove 102 is also formed on the third inclined ejector pin 10. The end of the third spring 17 is located in the spring groove 102. The two ends of the third spring 17 are respectively in contact with the bottom of the spring groove 102 and the spring mounting block 16. The inclination angle of the third spring 17 is the same as the moving angle of the third inclined ejector pin upward and obliquely. During the mold opening process, when the third inclined ejector pin 10 moves upward and obliquely relative to the third slider 4, the third spring 17 is compressed; during the mold closing process, the elastic force of the third spring 17 is released and drives the third inclined ejector pin 10 to reset.

[0036] In the above technical solution: A number of guide sliders 43 are fixed to the bottom of the third slider 4. Guide sliding convex blocks 431 are provided on both sides of the bottom of the guide slider 43. A number of guide sliding grooves 511 are formed on the guiding inclined surface 51. A guide sliding groove 512 is formed in the middle of the guide sliding groove 511. The bottom of the guide slider 43 is located in the guide sliding groove 512. Guide sliding side blocks 53 are provided on both sides of the guide slider 43. The guide sliding side blocks 53 are fixed to the guide sliding groove 511. The side surface of the guide sliding side block 53 is located above the guide sliding convex block 431, so that the guide slider 43 is slidably installed in the guide sliding groove 511.

[0037] In the above technical solution: It further includes a bent sheath 18 and a fourth inclined ejector pin 19. The bent sheath 18 is obliquely fixed to the bottom of the fourth slider 5. The fourth inclined ejector pin 19 slidably penetrates through the bent sheath 18. A forming convex block 191 capable of forming an undercut on the product is formed on the top of the fourth inclined ejector pin 19. The air cylinder 8 drives the fourth slider 5 and the bent sheath 18 to move backward synchronously. Under the guidance of the inclined bent sheath 18, the fourth inclined ejector pin 19 moves obliquely downward, so that the forming convex block 191 is separated from the product. The moving direction of the fourth inclined ejector pin 19 is as shown by the arrow in Figure 4 . A spring base 20 is also fixed on the moving mold. A fourth spring is provided between the fourth inclined ejector pin 19 and the spring base 20. When the fourth inclined ejector pin 19 performs oblique undercut core pulling, the fourth spring is compressed; when re-closing the mold, the elastic force of the fourth spring is released, so that the fourth inclined ejector pin 19 is reset.

[0038] The working process of the present invention is as follows. When opening the mold, the fixed mold drives the first inclined guide post 6 and the second inclined guide post 7 to move upward relative to the first slider 1 and the second slider 2. When the first inclined guide post 6 moves upward, it drives the first slider 1 to move backward for core pulling at the same time, and a number of first inclined ejector pins 3 are driven to perform transverse core pulling; when the second inclined guide post 7 moves upward to contact the wall of the second guiding hole 22, the upward movement of the second inclined guide post 7 drives the second slider 2 to move backward, so that the second slider 2 moves backward relative to the first slider 1 with a delay; when the second slider 2 moves, the first slider 1 and the first inclined ejector pin 3 have both completed core pulling. At this time, the second slider 2 drives the first inclined ejector pin 3 and the first slider 1 to move synchronously through the guiding block 23. At the same time, when the second slider 2 moves, it drives the mounting seat 26 to move backward synchronously. The elastic force of the first spring 25 is released to prevent the second inclined ejector pin 24 from moving backward synchronously with the second slider 2, so that the head of the second inclined ejector pin 24 exposes the second slider 2 and performs transverse core pulling.

[0039] The air cylinder 8 drives the fourth slider 5 to move backward. The nitrogen spring 54 plays an auxiliary pushing role in the movement of the third slider 4 relative to the fourth slider 5. The third slider 4 moves obliquely downward along the guiding inclined surface 51 relative to the fourth slider 5 for core pulling. The third lifter 10 is driven by the third slider 4 and moves along the lifter guiding surface 52. Due to the different inclination angles of the lifter guiding surface 52 and the guiding inclined surface 51, the third lifter 10 gradually moves upward relative to the third slider 4. And under the guiding of the inclined guiding slider 11 and the guiding chute 42, the third lifter 10 gradually moves obliquely upward relative to the third slider 4, so that the product is separated from the forming groove 12, realizing the core pulling of the third lifter 10. During this process, the end of the lifter ejector pin 13 gradually exposes from the third lifter 10, assisting the product to be separated from the forming groove 12, and the second spring 14 and the third spring 17 are compressed.

[0040] While the fourth slider 5 moves backward, it drives the bent sheath 18 to move backward. Under the guiding of the inclined bent sheath 18, the fourth lifter 19 moves obliquely downward, so that the forming convex block 191 is separated from the product. At this time, the fourth spring is compressed.

[0041] In the present invention, the first angled guide pillar 6 and the second angled guide pillar 7 drive the first slider 1 and the second slider 2 to move obliquely upward for core pulling respectively, and at the same time realize the delayed core pulling of the second slider 2, so that the undercuts on the first slider 1 and the undercuts on the second slider 2 are subjected to segmented core pulling, preventing the situation of the product sticking to the slider during simultaneous core pulling, which may cause product scratching and core pulling failure. When the first slider 1 moves, the three groups of first lifters 3 are driven to perform transverse core pulling. When the second slider 2 moves, the head of the second lifter 24 exposes from the second slider 2 and performs transverse core pulling. The first lifters 3 and the second lifters 24 can be set to different inclined directions according to the different required core pulling directions, meeting the core pulling requirements of the product in different directions and at different angles. By driving the fourth slider 5 to move backward by the air cylinder 8, the third slider 4 moves obliquely downward along the guiding inclined surface 51 relative to the fourth slider 5 for core pulling. At the same time, the third lifter 10 gradually moves obliquely upward relative to the third slider 4 for core pulling. At the same time, the fourth slider 5 drives the bent sheath 18 to move backward, so that the fourth lifter 19 moves obliquely downward for core pulling. The movement of the fourth slider 5 realizes the core pulling of the third slider 4, the third lifter 10 and the fourth lifter 19 in different directions and at different angles. The structure is compact, occupies a small space, the transmission is simple and reliable, meeting the core pulling requirements of the product in different directions and at different angles, and realizing the core pulling of products with complex structures.

[0042] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should fall within the protection scope of the present invention.

Claims

1. The stack slider core-pulling mechanism of an injection mold, characterized in that It includes a first power source, a second power source, a first slider (1) and a second slider (2). The second slider (2) is slidably arranged on a moving template (9). The first slider (1) is slidably arranged above the second slider (2). A plurality of first lifters (3) are penetrated through the first slider (1). When the first power source drives the first slider (1) to move, the plurality of first lifters (3) are driven to perform lateral core-pulling. After the first slider (1) finishes moving, the second power source drives the second slider (2) to move for core-pulling.

2. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that It further includes a third power source, a third slider (4) and a fourth slider (5). The second slider (2) is located above the third slider (4). The third slider (4) is inclined and slidably arranged on the fourth slider (5). When the third power source drives the fourth slider (5) to move backward, the third slider (4) moves obliquely downward relative to the fourth slider (5) for core-pulling.

3. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that A second lifter (24) is penetrated through the second slider (2). A first spring (25) and a mounting seat (26) are arranged at the tail of the second lifter (24). The mounting seat (26) is fixed on the second slider (2). Two ends of the first spring (25) are respectively connected with the second lifter (24) and the mounting seat (26). When in a mold-closing state, the first spring (25) is in a compressed state. When the second slider (2) moves, it drives the mounting seat (26) to move backward synchronously. Elastic force of the first spring (25) is released, so that the head of the second lifter (24) exposes from the second slider (2) and performs lateral core-pulling.

4. The stacked slider core-pulling mechanism of the injection mold according to claim 3, characterized in that A stop block (27) is mounted on a side surface of the second lifter (24). A limiting hole is formed in the second slider (2). The stop block (27) is movably arranged in the limiting hole. When the stop block (27) contacts a hole wall of the limiting hole, the second slider (2) drives the second lifter (24) to move backward synchronously.

5. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that The first power source includes a number of first inclined guide posts (6), the second power source includes a number of second inclined guide posts (7), the ends of the first inclined guide posts (6) and the second inclined guide posts (7) are both connected to the fixed mold, a number of first inclined guide holes are formed on the first slider (1), the first inclined guide posts (6) are inserted into the first inclined guide holes, the side surface of the first inclined guide posts (6) is in contact with the first guide hole wall on the first inclined guide holes, a number of second inclined guide holes (21) are formed on the second slider (2), the second inclined guide posts (7) are inserted into the second inclined guide holes (21), there is a distance between the side surface of the second inclined guide posts (7) and the second guide hole wall (22) on the second inclined guide holes (21), when the mold is opened, the fixed mold drives the first inclined guide posts (6) and the second inclined guide posts (7) to move upward, the upward movement of the first inclined guide posts (6) drives the first slider (1) to move backward for core pulling at the same time, when the second inclined guide posts (7) move upward to be in contact with the second guide hole wall (22), the upward movement of the second inclined guide posts (7) drives the second slider (2) to move backward, so that the second slider (2) moves backward relative to the first slider (1) with a delay, when the second slider (2) moves, the first slider (1) and the first ejector pin (3) have both completed core pulling.

6. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that The second slider (2) is inclined and arranged on the moving template (9), the first slider (1) is inclined and arranged on the second slider (2), and both the first slider (1) and the second slider (2) move obliquely upward.

7. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that A guide block (23) is fixed on the second slider (2), the end of the guide block (23) is bent to form a guide projection (231), a chute (31) is formed at the tail end of the rod part of the first ejector pin (3), and the guide projection (231) is located in the chute (31) so that the first ejector pin (3) moves along the guide projection (231).

8. The stack slider core-pulling mechanism of the injection mold according to claim 1, characterized in that There are three groups of the first ejector pins (3) in total, and the three groups of the first ejector pins (3) can be set to different inclined directions according to different required core pulling directions.

9. The stacked slider core-pulling mechanism of the injection mold according to claim 2, characterized in that The fourth slider (5) is provided with a guiding inclined surface (51), the third slider (4) is slidably arranged on the guiding inclined surface (51), and further includes a third lifter (10). A moving cavity (41) is formed on the third slider (4), the third lifter (10) is slidably arranged in the moving cavity (41), a forming groove (12) is formed on the side surface of the third lifter (10), and the forming groove (12) constitutes part of the cavity. A guiding groove is formed on the guiding inclined surface (51), the bottom of the guiding groove is a lifter guiding surface (52), and the inclination angle of the lifter guiding surface (52) is smaller than that of the guiding inclined surface (51). The bottom surface of the third lifter (10) is in contact with the lifter guiding surface (52). An inclined guiding slider (11) is arranged on the side surface of the third lifter (10), and an inclined guiding chute (42) is correspondingly arranged in the moving cavity (41). The guiding slider (11) is located in the guiding chute (42). When the third slider (4) moves obliquely downward along the guiding inclined surface (51), the third lifter (10) is driven by the third slider (4) and moves along the lifter guiding surface (52), and the third lifter (10) gradually moves upward relative to the third slider (4); and under the guiding of the inclined guiding slider (11) and the guiding chute (42), the third lifter (10) gradually moves obliquely upward relative to the third slider (4), so that the product is separated from the forming groove (12).

10. The stack slider core-pulling mechanism of the injection mold according to claim 9, characterized in that An ejector pin (13) is arranged in the third lifter (10), a second spring (14) is sleeved on the ejector pin (13). A large ejector pin hole and a small ejector pin hole are formed in the third lifter (10), and a spring step (101) is formed between the large ejector pin hole and the small ejector pin hole. The ejector pin (13) is arranged through the large ejector pin hole and the small ejector pin hole. A positioning block (15) is arranged at the tail of the ejector pin (13), and the positioning block (15) is fixed on the third slider (4). The two ends of the second spring (14) are respectively abutted against the positioning block (15) and the spring step (101). In the mold closing state, the end surface of the ejector pin (13) and the bottom of the forming groove (12) are on the same plane; during the mold opening and core pulling process, the third lifter (10) moves obliquely upward relative to the third slider (4), the end of the ejector pin (13) gradually exposes from the third lifter (10) to assist the product to be separated from the forming groove (12), and the second spring (14) is compressed.

11. The stacked slider core-pulling mechanism of the injection mold according to claim 9, characterized in that A spring mounting block (16) is provided on the side of the third lifter (10). The spring mounting block (16) is fixed on the third slider (4). An inclined third spring (17) is provided on the spring mounting block (16). A spring groove (102) is also formed on the third lifter (10). The end of the third spring (17) is located in the spring groove (102). The two ends of the third spring (17) are respectively in contact with the bottom of the spring groove (102) and the spring mounting block (16). The inclination angle of the third spring (17) is the same as the moving angle of the third lifter upward and obliquely. During the mold opening process, when the third lifter (10) moves upward and obliquely relative to the third slider (4), the third spring (17) is compressed. During the mold closing process, the elastic force of the third spring (17) is released and drives the third lifter (10) to reset.

12. The stacked slider core-pulling mechanism of the injection mold according to claim 2, characterized in that It further includes a bent sheath (18) and a fourth lifter (19). The bent sheath (18) is inclined and fixed at the bottom of the fourth slider (5). The fourth lifter (19) slidably penetrates through the bent sheath (18). A forming convex block (191) capable of forming an undercut on the product is formed on the top of the fourth lifter (19). The fourth slider (5) and the bent sheath (18) move backward synchronously. Under the guidance of the inclined bent sheath (18), the fourth lifter (19) moves downward obliquely, so that the forming convex block (191) disengages from the product.

13. The stacked slider core-pulling mechanism of the injection mold according to claim 12, characterized in that A spring base (20) is also fixed on the moving mold. A fourth spring is provided between the fourth lifter (19) and the spring base (20). When the fourth lifter (19) performs an undercut extraction obliquely downward, the fourth spring is compressed. When the mold is re-closed, the elastic force of the fourth spring is released, so that the fourth lifter (19) resets.

14. The stack slider core-pulling mechanism of the injection mold according to claim 2, characterized in that The third power source is a cylinder (8). The cylinder rod of the cylinder (8) is connected to the fourth slider (5). The cylinder (8) drives the fourth slider (5) to move backward. A plurality of nitrogen springs (54) are also installed on the fourth slider (5). The ends of the nitrogen springs (54) are in contact with the third slider (4).

15. The stack slider core-pulling mechanism of the injection mold according to claim 9, characterized in that A plurality of guide sliders (43) are fixed at the bottom of the third slider (4). Guide sliding convex blocks (431) are provided on both sides of the bottom of the guide slider (43). A plurality of guide sliding grooves (511) are formed on the guiding inclined surface (51). A guide sliding groove (512) is formed in the middle of the guide sliding groove (511). The bottom of the guide slider (43) is located in the guide sliding groove (512). Guide sliding side blocks (53) are provided on both sides of the guide slider (43). The guide sliding side blocks (53) are fixed on the guide sliding groove (511). The side surface of the guide sliding side block (53) is located above the guide sliding convex block (431), so that the guide slider (43) is slidably installed in the guide sliding groove (511).

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