Multi-sliding-block core pulling mechanism of injection mold
By designing a multi-slider core-pulling mechanism, and combining the cooperation of the oblique sliding block and the oblique sliding groove, the problems of inconsistent appearance and slider offset in existing molds are solved, and the precision molding and high stability of the headphone shell are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2026-04-14
AI Technical Summary
Existing injection molds cannot meet the high appearance requirements of headphone shells, resulting in inconsistent and unattractive appearance of molded products. Furthermore, the core-pulling slider is prone to displacement during mold closing, leading to unqualified finished products.
The multi-slider core-pulling mechanism includes an upper mold core, a lower mold core, a first side sliding block, a second side sliding block, and an inclined sliding block. Precision molding is achieved through the cooperation of the inclined sliding block and the inclined sliding groove. The positional accuracy and stability of the slider are improved by the limit sleeve and the limit pin.
It improves the appearance consistency and stability of molded products, avoids wire clamping, ensures product yield and aesthetic appearance, and achieves a precision molding effect where wire clamping is invisible.
Smart Images
Figure CN121848611A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a multi-slider core-pulling mechanism for injection molds, belonging to the field of injection mold technology. Background Technology
[0002] Headphones consist of an earphone shell, which is typically made of plastic. The manufacture of the earphone shell requires an injection molding machine. During headphone production, the earphone shell needs to be injection molded. Injection molds are generally designed for thermoplastic molding. Utilizing the principle of thermoplastic melting, molten plastic is injected into the mold cavity through an injection molding machine. After cooling and solidification, the mold is opened to remove the plastic product. Injection molding requires both a fixed mold and a moving mold. Due to the high requirements for appearance, existing mold structures cannot meet the high aesthetic demands of headphones. Summary of the Invention
[0003] The purpose of this invention is to provide a multi-slider core-pulling mechanism for injection molds. This mechanism can improve the stability of the step difference in the molded product, ensure a consistent and aesthetically pleasing appearance, and achieve a precision molding effect where the clamping lines are visible but not tangible.
[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a multi-slider core-pulling mechanism for injection molds, comprising: an upper mold core, a lower mold core, and a first side-pulling slider and a second side-pulling slider arranged facing each other. The first and second side-pulling sliders can each move closer to or further away from each other in a horizontal direction. The ends of the first and second side-pulling sliders that are close to each other can be slidably embedded into the lower mold core. An inclined downward-extending mounting through hole is formed on the upper surface of the lower mold core in the region between the first and second side-pulling sliders. A sliding core-pulling mechanism is provided within this mounting through hole. A slanted sliding block is dynamically installed. When the mold is closed, the upper end face of the slanted sliding block, which is slanted, forms a cavity for molding the product with the upper mold core, the lower mold core, and the first and second side sliding blocks that are close to each other. The first and second side sliding blocks each have a protrusion on their end faces facing one end of the slanted sliding block and located outside the cavity area. The slanted sliding block has a through hole for two oppositely arranged protrusions to be inserted. During the mold closing process, the two adjacent protrusions are simultaneously inserted into the through hole on the slanted sliding block. The lower end of the inclined slide block passes through the mounting hole and is slidably connected to an inclined slide block seat that can slide in the horizontal direction. An inclined slide groove is provided at one end of the inclined slide block seat near the inclined slide block, so that the lower end of the inclined slide block is embedded in the inclined slide groove at one end near the lower mold core, which is lower than the other end. The inclined slide block, whose lower end face is in sliding contact with the bottom surface of the inclined slide groove, is connected to the side wall of the inclined slide groove by at least one set of guide protrusions and guide grooves. An inclined guide groove is provided on the lower surface of the other end of the inclined slide block seat. An inclined shovel base that can move in the vertical direction has an inclined part embedded in the inclined guide groove at the upper end of its vertical part. The upper end of the inclined part that slides in cooperation with the inner wall of the inclined guide groove is inclined towards the inclined slide block.
[0005] The following are further improvements to the above technical solution: 1. In the above scheme, a limiting sleeve is fixedly installed below the inclined sliding block seat. The lower end of a vertically extending limiting spring is connected to the bottom of the limiting sleeve. The upper end of the limiting spring is sleeved on the outside of a limiting pin. This limiting pin has a flange portion extending radially outward. Above the flange portion whose lower surface is in contact with the upper end surface of the limiting spring and located on the inner wall of the limiting sleeve, there is an inner protrusion portion that cooperates with the flange portion. The lower surface of the inclined sliding block seat has two limiting grooves spaced apart along its movement direction. When the upper end surface of the flange portion on the limiting pin is in contact with the lower end surface of the inner protrusion portion on the inner wall of the limiting sleeve, the upper end of the vertically moving limiting pin can be embedded in any one of the limiting grooves.
[0006] 3. In the above scheme, the cross-section of the limiting groove is triangular, and the upper end of the limiting groove is set as a pointed cone.
[0007] 4. In the above scheme, when the mold is closed, the upper end of the limit pin is embedded in the limit groove away from the inclined sliding block.
[0008] 5. In the above scheme, the limiting groove is opened on the side of the inclined guide groove near the inclined sliding block.
[0009] 6. In the above scheme, the cross-sectional width of the vertical part of the inclined shovel base is smaller than the cross-sectional width of its inclined part.
[0010] 7. In the above scheme, when the mold is closed, the upper end of the inclined part of the inclined shovel base passes through the inclined guide groove that runs vertically through the mold.
[0011] 8. In the above scheme, the inclined sliding block and the two side walls of the inclined sliding groove are connected by a set of guide protrusions and guide grooves.
[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The multi-slider core-pulling mechanism of the injection mold of the present invention has an inclined downward extending mounting through hole on the upper surface of the lower mold core in the area between the first side sliding block and the second side sliding block. An inclined sliding block is slidably installed in this mounting through hole. When the mold is closed, the upper end face of the inclined sliding block forms a cavity for molding the product with the upper mold core, the lower mold core, and the adjacent first and second side sliding blocks. Each of the first and second side sliding blocks has a protrusion on its end face facing the inclined sliding block and located outside the cavity area. The inclined sliding block has a through hole for two opposing protrusions to be inserted. During the mold closing process, the two opposing protrusions are inserted into the through hole. The protrusions are synchronously embedded into the through holes on the inclined slide block. The lower end of the inclined slide block protrudes through the mounting through hole and is slidably connected to an inclined slide block seat that can slide in the horizontal direction. An inclined slide groove is provided at one end of the inclined slide block seat near the inclined slide block. The end of the inclined slide groove into which the lower end of the inclined slide block is embedded is lower than the other end. The inclined slide block, whose lower end face slides in contact with the bottom surface of the inclined slide groove, is connected to the side wall of the inclined slide groove by at least one set of guide protrusions and guide grooves. An inclined guide groove is provided on the lower surface of the other end of the inclined slide block seat. An inclined guide shovel base that can move in the vertical direction has an inclined part embedded in the inclined guide groove at its upper vertical part. The inclined part slides in contact with the inner wall of the inclined guide groove. The upper end is inclined towards the angled sliding block. While meeting the precision appearance requirements of the molded product through three sets of core-pulling slides, it also improves the positional accuracy of the three core-pulling slides during mold closing. This avoids the formation of small tolerances due to relative movement of multiple core-pulling slides during mold closing, which could lead to noticeable webbing on the molded product. It also improves the stability of the molded product's step difference, ensuring a consistent and aesthetically pleasing appearance, achieving a precision molding effect where webbing is visible but not palpable. Furthermore, the mechanically driven angled sliding block provides excellent stability and allows for continuous wedging and positioning of the slide during mold closing and injection molding, while maintaining stable pressure resistance. This prevents the finished product from failing to meet appearance standards due to slide displacement. Additionally, a limiting sleeve is fixedly installed below the angled sliding block seat. The lower end of a vertically extending limiting spring is connected to the bottom of a limiting sleeve. The upper end of the limiting spring is sleeved on the outside of a limiting pin. This limiting pin has a flange portion that extends radially outward. Above the flange portion whose lower surface is in contact with the upper end face of the limiting spring and on the inner wall of the limiting sleeve, there is an inner protrusion portion that mates with the flange portion. The lower surface of the inclined sliding block seat has two limiting grooves spaced apart along its movement direction. When the upper end face of the flange portion on the limiting pin is in contact with the lower end face of the inner protrusion portion on the inner wall of the limiting sleeve, the upper end of the vertically moving limiting pin can be embedded in any one of the limiting grooves, further improving the positional accuracy of the inclined sliding block during multiple mold opening and closing processes, thereby improving product yield and consistency. Attached Figure Description
[0013] Appendix Figure 1This is a schematic diagram of the overall external structure of the multi-slider core-pulling mechanism of the injection mold of the present invention; Appendix Figure 2 for Figure 1 A cross-sectional view along the AA' direction; Appendix Figure 3 Figure 2 A magnified view of a portion of point A in the middle; Appendix Figure 4 This is a partial structural schematic diagram of the multi-slider core-pulling mechanism of the injection mold of the present invention; Appendix Figure 5 A schematic diagram of the first step in the mold opening process of a multi-slider core-pulling mechanism for injection molds; Appendix Figure 6 This is a schematic diagram of the second step in the mold opening process of a multi-slider core-pulling mechanism for injection molds.
[0014] In the above attached figures: 1. Limiting pin; 101. Flange; 2. Limiting groove; 3. Upper mold core; 31. Injection channel; 4. Lower mold core; 41. Mounting through hole; 42. Stop step surface; 51. First side sliding block; 52. Second side sliding block; 53. Positioning protrusion; 54. Positioning groove; 7. Angled sliding block; 71. Flange surface; 8. Angled sliding block seat; 81. Angled sliding groove; 91. Guide protrusion; 92. Guide groove; 10. Cavity; 12. Limiting sleeve; 121. Inner protrusion; 13. Limiting spring; 15. Protrusion; 16. Through hole; 18. Angled sliding base; 181. Inclined part; 182. Vertical part; 19. Angled guide groove. Detailed Implementation
[0015] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.
[0016] Example 1: A multi-slider core-pulling mechanism for an injection mold, comprising: an upper mold core 3, a lower mold core 4, and a first side-pulling slider 51 and a second side-pulling slider 52 arranged facing each other. The first side-pulling slider 51 and the second side-pulling slider 52 can each move closer to or further away from each other in a horizontal direction. The ends of the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other can be slidably embedded into the lower mold core 4. An inclined downward-extending mounting through hole 41 is formed on the upper surface of the lower mold core 4 in the area between the first side-pulling slider 51 and the second side-pulling slider 52. An inclined core-pulling slider is slidably installed in this mounting through hole 41. 7. When the mold is closed, the upper end face of the inclined sliding block 7, which is inclined, forms a cavity 10 for molding the product between the upper mold core 3, the lower mold core 4, and the first side sliding block 51 and the second side sliding block 52 that are close to each other. The first side sliding block 51 and the second side sliding block 52 each have a protrusion 15 on their end faces facing one end of the inclined sliding block 7 and located outside the cavity 10 area. The inclined sliding block 7 has a through hole 16 for two oppositely arranged protrusions 15 to be inserted. During the mold closing process, the two adjacent protrusions 15 are simultaneously inserted into the through hole 16 on the inclined sliding block 7. The lower end of the inclined slide block 7 passes through the mounting through hole 41 and is slidably connected to an inclined slide block seat 8 that can slide in the horizontal direction. An inclined slide groove 81 is provided at one end of the inclined slide block seat 8 near the inclined slide block 7. The lower end of the inclined slide block 7 is embedded in the inclined slide groove 81. The end of the inclined slide groove 81 near the lower mold core 4 is lower than the other end. The inclined slide block 7, whose lower end surface is in sliding contact with the bottom surface of the inclined slide groove 81, is connected to the side wall of the inclined slide groove 81 by at least one set of guide protrusions 91 and guide grooves 92. An inclined guide groove 19 is provided on the lower surface of the other end of the inclined slide block seat 8. An inclined slide base 18 that can move in the vertical direction has an inclined part 181 embedded in the inclined guide groove 19 at its upper end. The upper end of the inclined part 181 that slides in cooperation with the inner wall of the inclined guide groove 19 is inclined towards the inclined slide block 7.
[0017] A limiting sleeve 12 is fixedly installed below the aforementioned inclined sliding block seat 8. The lower end of a vertically extending limiting spring 13 is connected to the bottom of the limiting sleeve 12. The upper end of the limiting spring 13 is sleeved on the outside of a limiting pin 1. The limiting pin 1 has a flange portion 101 extending radially outward. Above the flange portion 101, which is pressed against the upper end face of the limiting spring 13, and on the inner wall of the limiting sleeve 12, there is an inner protrusion 121 that cooperates with the flange portion 101. The lower surface of the inclined sliding block seat 8 is provided with two limiting grooves 2 spaced apart along its movement direction. When the upper end face of the flange portion 101 on the limiting pin 1 is in contact with the lower end face of the inner protrusion 121 on the inner wall of the limiting sleeve 12, the upper end of the vertically moving limiting pin 1 can be embedded in any one of the limiting grooves 2.
[0018] The cross-section of the aforementioned limiting groove 2 is triangular, and the upper end of the aforementioned limiting groove 2 is set as a pointed cone.
[0019] When the mold is closed, the upper end of the aforementioned limiting pin 1 is embedded in the limiting groove 2 that is far away from the inclined sliding block 7.
[0020] The aforementioned limiting groove 2 is located on the side of the inclined guide groove 19 near the inclined sliding block 7.
[0021] The cross-sectional width of the vertical part 182 of the aforementioned inclined shovel base 18 is smaller than the cross-sectional width of its inclined part 181.
[0022] When the mold is closed, the upper end of the inclined portion 181 of the inclined shovel base 18 protrudes through the inclined guide groove 19 that runs vertically through the mold.
[0023] The oblique sliding block 7 and the oblique sliding groove 81 are connected to each of the two side walls by a set of guide protrusions 91 and guide grooves 92.
[0024] Example 2: A multi-slider core-pulling mechanism for an injection mold, comprising: an upper mold core 3, a lower mold core 4, and a first side-pulling slider 51 and a second side-pulling slider 52 arranged facing each other. The first side-pulling slider 51 and the second side-pulling slider 52 can each move closer to or further away from each other in a horizontal direction. The ends of the first side-pulling slider 51 and the second side-pulling slider 52 that are close to each other can be slidably embedded into the lower mold core 4. An inclined downward-extending mounting through hole 41 is formed on the upper surface of the lower mold core 4 in the area between the first side-pulling slider 51 and the second side-pulling slider 52. An inclined core-pulling slider is slidably installed in this mounting through hole 41. 7. When the mold is closed, the upper end face of the inclined sliding block 7, which is inclined, forms a cavity 10 for molding the product between the upper mold core 3, the lower mold core 4, and the first side sliding block 51 and the second side sliding block 52 that are close to each other. The first side sliding block 51 and the second side sliding block 52 each have a protrusion 15 on their end faces facing one end of the inclined sliding block 7 and located outside the cavity 10 area. The inclined sliding block 7 has a through hole 16 for two oppositely arranged protrusions 15 to be inserted. During the mold closing process, the two adjacent protrusions 15 are simultaneously inserted into the through hole 16 on the inclined sliding block 7. The lower end of the aforementioned inclined slide block 7 passes through the mounting through hole 41 and is slidably connected to an inclined slide block seat 8 that can slide in the horizontal direction. An inclined slide groove 81 is provided at one end of the inclined slide block seat 8 near the inclined slide block 7. The lower end of the inclined slide block 7 is embedded in the inclined slide groove 81. The end of the inclined slide groove 81 near the lower mold core 4 is lower than the other end. The inclined slide block 7 and the side wall of the inclined slide groove 81 are connected by at least one set of guide protrusions 91 and guide grooves 92. An inclined guide groove 19 is provided on the lower surface of the other end of the inclined slide block seat 8. An inclined slide base 18 that can move in the vertical direction has an inclined part 181 embedded in the inclined guide groove 19 at its upper end. The upper end of the inclined part 181 that slides in cooperation with the inner wall of the inclined guide groove 19 is inclined towards the inclined slide block 7.
[0025] A limiting sleeve 12 is fixedly installed below the aforementioned inclined sliding block seat 8. The lower end of a vertically extending limiting spring 13 is connected to the bottom of the limiting sleeve 12. The upper end of the limiting spring 13 is sleeved on the outside of a limiting pin 1. The limiting pin 1 has a flange portion 101 extending radially outward. Above the flange portion 101, which is pressed against the upper end face of the limiting spring 13, and on the inner wall of the limiting sleeve 12, there is an inner protrusion 121 that cooperates with the flange portion 101. The lower surface of the inclined sliding block seat 8 is provided with two limiting grooves 2 spaced apart along its movement direction. When the upper end face of the flange portion 101 on the limiting pin 1 is in contact with the lower end face of the inner protrusion 121 on the inner wall of the limiting sleeve 12, the upper end of the vertically moving limiting pin 1 can be embedded in any one of the limiting grooves 2.
[0026] The oblique sliding block 7 and the oblique sliding groove 81 are connected to each of the two side walls by a set of guide protrusions 91 and guide grooves 92.
[0027] The upper surface of the lower mold core 4 is provided with a first groove and a second groove that respectively cooperate with the first side sliding block 51 and the second side sliding block 52; The aforementioned guide groove 92 is formed on the side wall of the inclined sliding groove 81, and the aforementioned guide protrusion 91, which is slidably embedded in the guide groove 92, is formed on the outer surface of the lower end of the inclined sliding block 7. Each of the aforementioned first side sliding block 51, second side sliding block 52, and inclined sliding block seat 8 is provided with a guide component on both sides opposite to one end of the lower mold core 4. The upper mold core 3 is provided with a glue injection channel 31 that communicates with the cavity 10; At least one set of mutually cooperating positioning protrusions 53 and positioning grooves 54 are provided between the first side sliding block 51 and the second side sliding block 52. When the mold is closed, the positioning protrusions 53 are embedded in the positioning grooves 54. The inner diameter of the upper section of the mounting through hole 41 on the lower mold core 4 is smaller than the inner diameter of the lower section, thereby forming a stop step surface 42. The inclined sliding block 7, which slides in conjunction with the mounting through hole 41, has a flange surface 71 that mates with the stop step surface 42. When the mold is closed, the flange surface 71 on the inclined sliding block 7 is in contact with the stop step surface 42 in the mounting through hole 41.
[0028] Working principle: When the mold is closed, the inclined slide block is at the top of its stroke, the upper mold core and the lower mold core are close to each other in the vertical direction, and the first side slide block and the second side slide block are close to each other in the horizontal direction, with the protrusions on them respectively embedded in the through holes on the inclined slide block. Molten glue is injected into the cavity formed by the inclined slide block, the upper mold core, the lower mold core, the first side slide block and the second side slide block through the glue injection channel to perform injection molding, cooling and molding of the product to be processed. After the product cools and solidifies, the mold is opened. The main process of mold making is as follows: First, as attached Figure 5 As shown, the upper mold core separates from the lower mold core, and the first side sliding block and the second side sliding block move away from each other in the horizontal direction to achieve demolding. Next, as attached Figure 6 The inclined shovel base moves upward as shown. As the inclined part on the inclined shovel base moves upward in the inclined guide groove on the inclined slide block seat, the vertical motion is converted into horizontal motion through the sliding action of the inclined surfaces. The inclined shovel base pushes the inclined slide block seat away from the lower mold core in the horizontal direction until the upper end of the limit pin is embedded in the limit groove on the inclined slide block seat near the inclined slide block. During this process, through the cooperation of the guide protrusion and guide groove in the inclined slide groove, the inclined slide block seat pulls the inclined slide block downward and backward in the mounting through hole on the lower mold core to achieve demolding. The mold is closed again to prepare for the next product. The main process of mold closing is as follows: As the inclined shovel base moves downward, the inclined slide block seat moves horizontally towards the lower mold core under the reverse push of the inclined part on the inclined shovel base until the upper end of the limit pin is embedded in the limit groove on the inclined slide block seat away from the inclined slide block. Under the reverse push of the inclined slide block seat, the inclined slide block slides forward and upward in the mounting through hole on the lower mold core until the flange surface on the inclined slide block is in contact with the stop step surface in the mounting through hole. The upper and lower mold cores approach each other vertically, and the first and second side sliding blocks approach each other horizontally, with their two protrusions simultaneously engaging the through holes on the inclined sliding block to achieve mold closing. Molten resin is then injected again through the injection channel into the cavity formed by the inclined sliding block, upper mold core, lower mold core, first side sliding block, and second side sliding block. The product to be processed is then injection molded, cooled, and formed. When using the multi-slider core-pulling mechanism of the above-mentioned injection mold, it not only meets the precision appearance requirements of the molded product through 3 sets of core-pulling sliders, but also improves the positional accuracy of the 3 core-pulling sliders when the mold is closed. It avoids the formation of small tolerances due to the relative movement of multiple core-pulling sliders during mold closing, which would result in obvious clamping lines on the molded product. It improves the stability of the step difference of the molded product, ensures the consistent and beautiful appearance, and achieves a precision molding effect where clamping lines are visible but not tangible. Moreover, the mechanical driving of the inclined core-pulling slider has good stability and can continuously wedge and position the slider during the mold closing injection process, with stable pressure bearing performance, avoiding the situation where the finished product is unqualified due to slider displacement. Furthermore, the positional accuracy of the inclined sliding block during multiple mold opening and closing processes can be further improved, thereby increasing product yield and consistency.
[0029] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A multi-slider core-pulling mechanism for injection molds, comprising: The upper mold core (3), the lower mold core (4), and the first side sliding block (51) and the second side sliding block (52) arranged opposite to each other, wherein the first side sliding block (51) and the second side sliding block (52) can each move closer to or further away from each other in the horizontal direction, characterized in that: the ends of the first side sliding block (51) and the second side sliding block (52) that are close to each other can be slidably embedded in the lower mold core (4), and an inclined downward extending mounting through hole (41) is opened on the upper surface of the lower mold core (4) in the area between the first side sliding block (51) and the second side sliding block (52), and an inclined sliding block (7) is slidably installed in this mounting through hole (41). When in the mold closed state, The upper end face of the inclined sliding block (7) is formed with the upper mold core (3), the lower mold core (4) and the first side sliding block (51) and the second side sliding block (52) that are close to each other to form a cavity (10) for molding products. The first side sliding block (51) and the second side sliding block (52) are each provided with a protrusion (15) on the end face of the inclined sliding block (7) and located outside the cavity (10) area. The inclined sliding block (7) has a through hole (16) for the two opposite protrusions (15) to be inserted. During the mold closing process, the two protrusions (15) that are close to each other are simultaneously inserted into the through hole (16) on the inclined sliding block (7). The lower end of the inclined sliding block (7) passes through the mounting through hole (41) and is slidably connected to an inclined sliding block seat (8) that can slide in the horizontal direction. The inclined sliding block seat (8) has an inclined sliding groove (81) at one end near the inclined sliding block (7), so that the lower end of the inclined sliding block (7) is embedded in the inclined sliding groove (81). The end of the inclined sliding groove (81) near the lower mold core (4) is lower than the other end. The inclined sliding block (7) and the inclined sliding groove (81) slide in contact with the bottom surface of the inclined sliding groove (81). 1) The sidewalls are connected by at least one set of guide protrusions (91) and guide grooves (92). An oblique guide groove (19) is opened on the lower surface of the other end of the oblique sliding block seat (8). The upper end of the vertical part (182) of the oblique sliding shovel base (18) that can move in the vertical direction has an inclined part (181) embedded in the oblique guide groove (19). The upper end of the inclined part (181) that slides with the inner wall of the oblique guide groove (19) is inclined towards the oblique sliding block (7).
2. The multi-slider core-pulling mechanism for injection molds according to claim 1, characterized in that: A limiting sleeve (29) is fixedly installed below the inclined sliding block seat (8). The lower end of a vertically extending limiting spring (30) is connected to the bottom of the limiting sleeve (29). The upper end of the limiting spring (30) is sleeved on the outside of a limiting pin (1). The limiting pin (1) has a flange (101) that extends radially outward. The lower surface of the flange (101) is pressed against the upper end face of the limiting spring (30) and is located above the limiting sleeve. (29) has an inner protrusion (291) that cooperates with the flange (101) on its inner wall. The lower surface of the inclined sliding block (8) has two limiting grooves (2) spaced apart along its movement direction. When the upper end face of the flange (101) on the limiting pin (1) is in contact with the lower end face of the inner protrusion (291) on the inner wall of the limiting sleeve (29), the upper end of the limiting pin (1) that can move in the vertical direction can be embedded in any one of the limiting grooves (2).
3. The multi-slider core-pulling mechanism for injection molds according to claim 2, characterized in that: The cross-section of the limiting groove (2) is triangular, and the upper end of the limiting groove (2) is set as a pointed cone.
4. The multi-slider core-pulling mechanism for injection molds according to claim 2, characterized in that: When the mold is closed, the upper end of the limiting pin (1) is embedded in the limiting groove (2) away from the inclined sliding block (7).
5. The multi-slider core-pulling mechanism for injection molds according to claim 2, characterized in that: The limiting groove (2) is opened on the side of the inclined guide groove (19) near the inclined sliding block (7).
6. The multi-slider core-pulling mechanism for injection molds according to claim 1, characterized in that: The cross-sectional width of the vertical part (182) of the inclined shovel base (18) is smaller than the cross-sectional width of its inclined part (181).
7. The multi-slider core-pulling mechanism for injection molds according to claim 1 or 2, characterized in that: When the mold is closed, the upper end of the inclined portion (181) of the inclined shovel base (18) passes through the inclined guide groove (19) that runs through the upper and lower parts.
8. The multi-slider core-pulling mechanism for injection molds according to claim 1, characterized in that: The oblique sliding block (7) and the two side walls of the oblique sliding groove (81) are connected by a set of guide protrusions (91) and guide grooves (92).