Composite sliding block mechanism of injection mold

Abstract

The utility model belongs to the field of injection molds, and particularly relates to a composite sliding block mechanism of an injection mold, which comprises a hydraulic cylinder, a locking block and a sliding block component, the sliding block component comprises a sliding block seat, two bent pull rods, an outer sliding block core and an inner sliding block core, and a sliding groove for the inner sliding block core to slide is arranged in the sliding block seat. Two limiting control pins are arranged on the inner sliding block core in a sliding mode, two positioning grooves matched with the two limiting control pins are formed in the sliding groove, and two positioning parts matched with the two positioning grooves are arranged at one ends of the two limiting control pins. The inner sliding block core and the outer sliding block core can complete core pulling of the movable mold core and the fixed mold core, the inner sliding block core is locked in the positioning groove of the sliding block base through the two limiting control pins, and the phenomenon that the inner sliding block core retreats due to injection molding pressure impact can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and specifically relates to a composite slider mechanism for injection molds. Background Technology

[0002] Molds are used in industrial production for processes such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping to obtain desired products. The basic principle is to convert the vertical motion of mold opening and closing into horizontal motion. In plastic molds, the opening action causes a relative motion tendency between the inclined support pin and the slider, resulting in two different motion modes for the slider in the opening direction and the horizontal direction. This allows the slider to smoothly disengage from the undercut. For products with complex lateral undercuts, the slider mechanism can achieve demolding through lateral parting and core pulling, ensuring the product can be completely removed from the mold.

[0003] The existing slider mechanism of injection molds has a complex structure and high cost. Moreover, the slider structure cannot complete the core pulling of the moving mold core and the stationary mold core. During mold closing, the slider core is prone to being unable to be inserted properly due to the impact of injection pressure. The reliability of operation is not high, which greatly affects the production efficiency of the mold. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a composite slider mechanism for injection molds.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A composite slider mechanism for an injection mold includes a hydraulic cylinder, a locking block, and a slider assembly. The slider assembly includes a slider seat, two bent pull rods slidably disposed on the slider seat, an outer slider core that is linked and cooperates with the slider seat, and an inner slider core that is slidably disposed within the outer slider core and is linked and cooperates with the piston rod of the hydraulic cylinder. The slider seat is provided with a sliding groove for the inner slider core to slide in. Two limit control pins are slidably disposed on the inner slider core. The sliding groove is provided with two positioning grooves that cooperate with the two limit control pins. One end of the two limit control pins has two positioning parts that cooperate with the two positioning grooves. One end of the inner slider core is provided with a limit groove that cooperates with the piston rod. One end of the piston rod has a limit block that passes through the limit groove. The other end of the two limit control pins has two limit parts that cooperate with the limit block. The limit block moves with the piston rod and slides back and forth within the limit groove.

[0006] In some embodiments, a wear-resistant plate that cooperates with the inner slider core is provided between the locking block and the slider seat, and one end of the inner slider core has a contact slope that contacts the wear-resistant plate.

[0007] In some embodiments, the inner slider core has two guide protrusions, and the sliding groove of the slider seat is provided with two guide grooves that cooperate with the two guide protrusions. The two guide protrusions are slidably disposed in the two guide grooves and form a sliding connection between the two guide protrusions and the slider seat.

[0008] In some embodiments, the other end of the inner slider core has an inner core portion that cooperates with the outer slider core, and the outer slider core is provided with a sliding hole through which the inner core portion can pass.

[0009] In some embodiments, one end of the slider seat has a slot that mates with the outer slider core, and one end of the outer slider core has a block that engages in the slot.

[0010] In some embodiments, one end of the two bent tie rods has a guide portion, and the slider seat is provided with a guide oblique hole that cooperates with the guide portion of the two bent tie rods. The guide portion is inserted into the guide oblique hole and forms a sliding connection between the guide portion and the slider seat. The other end of the two bent tie rods has a pulling portion that protrudes outside the slider seat.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a composite slider mechanism with a double slider structure design. The inner slider core and outer slider core of the composite slider mechanism can complete the core pulling of the moving and fixed mold cores, realizing the lateral core pulling of injection molded products with complex structures. Moreover, when the mold is closed, the outer slider core is locked in the positioning groove of the slider seat by two limit control pins. When the outer slider core is impacted by the injection pressure, the outer slider core will not retract, ensuring that the outer slider core can be inserted into place, thereby improving the working reliability of the composite slider mechanism. During the mold opening process, the hydraulic cylinder starts first, the piston rod's limiting block separates from the limiting control pin, the limiting control pin unlocks from the positioning groove of the slider seat, and the limiting part of the limiting control pin protrudes into the limiting groove. The hydraulic cylinder pulls the inner slider core through the piston rod to perform the core pulling action. When the inner slider core moves to the wear-resistant plate, the inner slider core completes the action of pulling out the moving and fixed mold cores. When the moving mold and the fixed mold perform the mold opening action, the bent pull rod drives the slider seat to move, and the slider seat drives the outer slider core to perform the extraction action (at this time, the inner slider core does not move). During mold closing, the hydraulic cylinder is not activated. The moving mold and the fixed mold perform the mold closing action. The bent tie rod drives the slide block seat to move, and the slide block seat drives the outer slide block core to move. When the moving mold and the fixed mold close, the hydraulic cylinder is activated. The piston rod drives the inner slide block core to move through the limiting parts of the two limit control pins. When the limiting part of the piston rod pushes the positioning parts of the two limit control pins into the positioning groove, the inner slide block core is inserted into the position. The inner slide block core can be positioned in the slide block seat by the limit control pins, which can prevent the inner slide block core from exiting due to the impact of injection pressure. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0013] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0014] Figure 2 This is an exploded view of one embodiment of the present invention;

[0015] Figure 3 This is a perspective view of a bent tie rod according to an embodiment of the present invention. Detailed Implementation

[0016] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0018] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0020] like Figure 1As shown in Figures 1-3, a composite slider mechanism for an injection mold includes a hydraulic cylinder 10, a locking block 11, and a slider assembly 20. The slider assembly 20 includes a slider seat 21, two bent pull rods 22 slidably disposed on the slider seat 21, an outer slider core 23 that is linked with the slider seat 21, and an inner slider core 24 that is slidably disposed within the outer slider core 23 and linked with the piston rod 101 of the hydraulic cylinder 10. The slider seat 21 is provided with a sliding groove 211 for the inner slider core 24 to slide in. Two limit control pins 25 are slidably disposed on the inner slider core 24. The groove 211 contains two positioning grooves 212 that mate with two limit control pins 25. One end of each limit control pin 25 has two positioning portions 251 that mate with the positioning grooves 212. One end of the inner slider core 24 has a limit groove 241 that mates with the piston rod 101. One end of the piston rod 101 has a limit block 102 that passes through the limit groove 241. The other ends of the two limit control pins 25 have two limit portions 252 that mate with the limit block 102. The limit block 102 moves with the piston rod 101 and slides back and forth within the limit groove 241. The inner slider core 24 has a through hole 242 through which the two limit control pins 25 can pass. The slider assembly of this composite slider mechanism adopts a modular structure design, which facilitates modular assembly of the composite slider mechanism and improves assembly efficiency. A wear-resistant plate 26 is provided between the locking block 11 and the slider seat 21 to cooperate with the inner slider core 24. One end of the inner slider core 24 has a contact slope 243 that contacts the wear-resistant plate 26. The wear-resistant plate mainly serves to reduce wear on parts, extend the service life of the mold, and reduce replacement costs.

[0021] like Figure 2 As shown, the inner slider core 24 has two guide protrusions 244. The sliding groove of the slider seat 21 has two guide grooves 213 that mate with the two guide protrusions 244. The two guide protrusions 244 are slidably disposed in the two guide grooves 213, forming a sliding connection between the two guide protrusions 244 and the slider seat 21. The inner slider core is slidably disposed in the two guide grooves of the slider seat via the two guide protrusions, ensuring the reliable operation of the inner slider core. The other end of the inner slider core 24 has an inner core portion 244 that mates with the outer slider core 23. The outer slider core 23 has a sliding hole 231 through which the inner core portion 244 passes. The inner core portion of the inner slider core is inserted into the sliding hole of the outer slider core, ensuring reliable operation of both the inner and outer slider cores, resulting in higher operational reliability. The slider base 21 has a slot 214 at one end that mates with the outer slider core 24, and the outer slider core 23 has a locking block 232 at one end that engages within the slot 214. The slider base and the outer slider core are assembled using a snap-fit ​​method, resulting in higher assembly efficiency.

[0022] like Figure 2 and 3As shown, each of the two bent tie rods 22 has a guide portion 221 at one end. The slider seat 21 is provided with a guide oblique hole 215 that mates with the guide portions 221 of the two bent tie rods 22. The guide portion 221 is inserted into the guide oblique hole 215, forming a sliding connection between the guide portion 221 and the slider seat 21. The other end of each bent tie rod 22 has a pulling portion 222 protruding from the slider seat 21. The guide portion of the bent tie rod is inserted into the guide oblique hole of the slider seat, thus ensuring that the bent tie rod can reliably and smoothly drive the slider seat, resulting in higher operational reliability.

[0023] This invention provides a composite slider mechanism with a dual-slider structure. The inner and outer slider cores of the composite slider mechanism can perform core pulling of the moving and fixed mold cores, realizing lateral core pulling of injection molded products with complex structures. Furthermore, during mold closing, the outer slider core is locked in the positioning groove of the slider seat by two limit control pins. When the outer slider core is subjected to the impact of injection pressure, it will not retract, ensuring that the outer slider core can be inserted into place, thereby improving the working reliability of the composite slider mechanism. During the mold opening process, the hydraulic cylinder 10 is activated first. The limiting block 102 of the piston rod 101 separates from the limiting part 252 of the limiting control pin 25. The limiting control pin 25 unlocks from the positioning groove 212 of the slider seat 21. The limiting part 252 of the limiting control pin 25 protrudes into the limiting groove 241. The hydraulic cylinder 10 pulls the inner slider core 24 through the piston rod 101 to perform the core pulling action. When the inner slider core 24 moves to the wear-resistant plate 26, the inner slider core 24 completes the action of pulling out the moving and fixed mold cores. When the moving mold and the fixed mold perform the mold opening action, the bent pull rod 22 drives the slider seat 21 to move. The slider seat 21 drives the outer slider core 23 to perform the extraction action (at this time, the inner slider core does not move). During the mold closing process, the hydraulic cylinder 11 is not activated. The moving mold and the fixed mold perform the mold closing action. The bent tie rod 22 drives the slider seat 21 to move. The slider seat 21 drives the outer slider core 23 to move. When the moving mold and the fixed mold close, the hydraulic cylinder 11 is activated. The piston rod 101 drives the inner slider core 24 to move through the limiting parts 252 of the two limiting control pins 25. When the limiting parts 102 of the piston rod 101 push the positioning parts 251 of the two limiting control pins 25 into the positioning groove 212, the inner slider core 24 is inserted into place.

[0024] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A composite slider mechanism for an injection mold, comprising a hydraulic cylinder, a locking block, and a slider assembly, characterized in that: The slider assembly includes a slider seat, two bent pull rods slidably mounted on the slider seat, an outer slider core that is linked with the slider seat, and an inner slider core that is slidably mounted inside the outer slider core and linked with the piston rod of the hydraulic cylinder. The slider seat has a sliding groove for the inner slider core to slide in. Two limit control pins are slidably mounted on the inner slider core. The sliding groove has two positioning grooves that cooperate with the two limit control pins. One end of each limit control pin has two positioning parts that cooperate with the two positioning grooves. One end of the inner slider core has a limit groove that cooperates with the piston rod. One end of the piston rod has a limit block that passes through the limit groove. The other end of each limit control pin has two limit parts that cooperate with the limit block. The limit block moves with the piston rod and slides back and forth in the limit groove.

2. The composite slider mechanism of the injection mold according to claim 1, characterized in that: A wear-resistant plate that mates with the inner slider core is provided between the locking block and the slider seat, and one end of the inner slider core has a contact slope that contacts the wear-resistant plate.

3. The composite slider mechanism of the injection mold according to claim 1 or 2, characterized in that: The inner slider core has two guide protrusions, and the sliding groove of the slider seat is provided with two guide grooves that cooperate with the two guide protrusions. The two guide protrusions are slidably disposed in the two guide grooves, and form a sliding connection between the two guide protrusions and the slider seat.

4. The composite slider mechanism of the injection mold according to claim 1 or 2, characterized in that: The inner slider core has an inner core portion at the other end that cooperates with the outer slider core, and the outer slider core is provided with a sliding hole through which the inner core portion can pass.

5. The composite slider mechanism of the injection mold according to claim 1 or 2, characterized in that: The slider seat has a groove at one end that mates with the outer slider core, and the outer slider core has a block at one end that engages with the groove.

6. The composite slider mechanism of the injection mold according to claim 1 or 2, characterized in that: The two bent tie rods have a guide portion at one end, and the slider seat is provided with a guide oblique hole that cooperates with the guide portion of the two bent tie rods. The guide portion is inserted into the guide oblique hole and forms a sliding connection between the guide portion and the slider seat. The other end of the two bent tie rods has a pulling portion that protrudes outside the slider seat.

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