A quick release mechanism of lower die core and ejector pin

Abstract

The utility model relates to injection mold ejection mechanism technical field, concretely relates to a quick release mechanism of lower mould core and ejector pin integration, quick release mechanism is detachably locked in B board through fastener, and quick release mechanism includes: lower mould core, and the product cavity is formed with upper mould core cooperation, and perpendicular direction is passed and is opened with multiple ejector pin holes, the upper end surface of lower mould core is opened with pull screw hole downwards, ejector pin assembly, and the installation space is left between lower mould core and fixed plate to install ejector pin assembly, and the ejector pin assembly includes multiple ejector pins, the first mounting plate of installing multiple ejector pins, the first push plate of being located first mounting plate below and being fixedly installed on first mounting plate, the first elastic member of being installed between lower mould core and first mounting plate and always being in the compressed state, the guide element of the movement of multiple ejector pins is guided, the utility model realizes integral dismounting function to overhaul and replace the insert in lower mould core and the ejector pin in ejector pin assembly, and dismounting is convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of ejection mechanisms for injection molds, and in particular to a quick-release mechanism that integrates the lower mold core and the ejector pin. Background Technology

[0002] In existing injection molds, the ejector system achieves ejection by means of the following method: the ejector pin is fixed to the ejector pin retaining plate, which is then fixed to the push plate by bolts. The push plate directly bears the thrust of the injection molding machine's ejector rod to push the ejector pin, thus ejecting the molded product from the cavity. A return spring is installed on the return rod to return the ejector pin to its original position. This structure has significant drawbacks: when the ejector pin needs to be replaced or repaired, the square iron and mold base plate must be removed, resulting in a very large amount of disassembly and assembly work. In addition, when the existing mold base system adopts a modular design, the same mold base can accommodate different mold cores, but when changing the mold core, the ejector pin and ejector pin retaining plate must be replaced accordingly. Moreover, replacing the lower mold core requires disassembling from the mold base plate upwards, completely disassembling the ejector pin mechanism until only the B plate remains. Then, the screws fixing the lower mold core can be unscrewed from the lower end face of the B plate to replace the lower mold core, resulting in a very large amount of disassembly and assembly work. How to achieve quick disassembly of the lower mold core and ejector pin is an urgent problem to be solved. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-release mechanism that integrates the lower mold core and the ejector pin, so as to solve the problem of large workload in the replacement, maintenance and disassembly of the lower mold core and ejector pin in the prior art.

[0004] The technical solution of this utility model is: a quick-release mechanism integrating a lower mold core and an ejector pin, wherein the quick-release mechanism is detachably locked to plate B by fasteners, and the quick-release mechanism includes:

[0005] The lower mold core, together with the upper mold core, forms the product cavity and has multiple ejector pin holes extending vertically through it; the upper end of the lower mold core has a pull-out screw hole facing downwards.

[0006] A fixing plate is located below the lower mold core and is fixedly installed on the lower mold core, and the fixing plate has a first through hole through it;

[0007] An ejector assembly is provided, wherein an installation space is provided between the lower mold core and the fixed plate for mounting the ejector assembly; the ejector assembly includes a plurality of ejector pins, a first mounting plate for mounting the plurality of ejector pins, a first push plate located below the first mounting plate and fixedly mounted on the first mounting plate, a first elastic member installed between the lower mold core and the first mounting plate and always in a compressed state, and a guide member for guiding the movement of the plurality of ejector pins.

[0008] After the first push rod passes through the first through hole, it pushes against the lower end of the first push plate to push it. When the multiple push pins do not move, the first push plate pushes against the upper end of the fixed plate under the action of the first elastic element.

[0009] Preferably, a pad, a square iron, and a base plate are fixedly installed in sequence below the B plate, and the first push rod is driven by a drive assembly, which is installed between the pad and the base plate.

[0010] The drive assembly includes a second mounting plate for mounting a first push rod, a second push plate located below the second mounting plate and fixed on the second mounting plate, a second elastic element installed between a pad and the second mounting plate and always in a compressed state, and a reset rod.

[0011] The reset rod is mounted on the second mounting plate, and the reset rod passes through the second elastic member and simultaneously passes through the pad and plate B.

[0012] Preferably, the bottom plate has a second through hole, and the second push rod passes through the second through hole and pushes against the lower end of the second push plate to push the second push plate.

[0013] When the multiple ejector pins are not activated, the second push plate abuts against the upper end face of the base plate under the action of the second elastic element.

[0014] The second push rod is driven by a drive component.

[0015] Preferably, the guide member is an inverted T-shaped guide rod, the head of the guide rod is embedded in the first mounting plate and its head end face abuts against the first push plate, and the rod part of the guide rod passes through the lower mold core.

[0016] Preferably, the lower end face of the lower mold core is provided with an upward-facing mounting blind hole for accommodating the first elastic element, and the two ends of the first elastic element respectively abut against the bottom of the mounting blind hole and the upper end face of the first mounting plate.

[0017] Preferably, the ejector pin is inverted T-shaped, the head of the ejector pin is embedded in the first mounting plate and its head end face abuts against the first push plate, and the pin shank of the ejector pin passes through the lower mold core.

[0018] Preferably, the first push rod is inverted T-shaped, the head of the first push rod is embedded in the second mounting plate and its head end face abuts against the second push plate, and the rod part of the first push rod passes through the fixing plate and the pad; when the plurality of the ejector pins are not activated, the end face of the first push rod away from the head is flush with the upper end face of the fixing plate.

[0019] Preferably, the lower end of the pad is provided with an upward-facing mounting hole for accommodating the second elastic element, and the two ends of the second elastic element respectively abut against the bottom of the mounting hole and the upper end of the second mounting plate.

[0020] Preferably, the lower end of the lower mold core is shaped like a support leg to cooperate with the fixing plate to form an installation space for mounting the ejector pin assembly.

[0021] Preferably, the top circumferential edge of the lower mold core is provided with a retaining notch for the fasteners that mount the quick-release mechanism to abut against it and restrict the movement of the quick-release mechanism.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] This utility model discloses a quick-release mechanism integrating a lower mold core and an ejector pin, comprising: a lower mold core, a fixing plate, and an ejector pin assembly. The lower mold core, fixing plate, and ejector pin assembly are integrated into a modular assembly. When the entire quick-release mechanism needs to be disassembled, first unscrew the screws that install the quick-release mechanism, then screw the pull screw into the pull screw hole, and lift the entire quick-release mechanism by pulling the screw, thereby removing the quick-release mechanism from the mold. This achieves the overall disassembly and assembly function, allowing for the inspection and replacement of inserts in the lower mold core and ejector pins in the ejector pin assembly. Disassembly and assembly are convenient and do not require the large amount of disassembly and assembly work required by existing technologies. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 A schematic diagram of a mold structure for applying a quick-release mechanism that integrates the lower mold core and ejector pin;

[0026] Figure 2 for Figure 1 Top view;

[0027] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0028] Figure 4 for Figure 2 Cross-sectional view at point BB;

[0029] Figure 5 This is a cross-sectional view of a quick-release mechanism integrating a lower mold core and an ejector pin as described in this utility model;

[0030] Figure 6 This is a three-dimensional structural diagram of a quick-release mechanism integrating a lower mold core and an ejector pin, as described in this utility model.

[0031] Figure 7 for Figure 6 Top view;

[0032] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at point CC;

[0033] Figure 9 This is a structural schematic diagram of the lower mold core from an upward angle according to the present invention;

[0034] Figure 10 This is an exploded structural diagram of the quick-release mechanism integrating the lower mold core and ejector pin described in this utility model.

[0035] The components are: 1. Top plate, 2. Upper pad plate, 3. A plate, 4. B plate, 5. Pad plate, 6. Square iron, 7. Bottom plate, 8. Screw, 9. Bayonet, 10. Lower mold core, 11. Fixing plate, 12. Ejector pin hole, 13. Pull-out screw hole, 14. Ejector pin, 15. First mounting plate, 16. First push plate, 17. First spring, 18. Guide rod, 19. Second mounting plate, 20. Second push plate, 21. Second spring, 22. Reset rod, 23. Second through hole, 24. Mounting blind hole, 25. Mounting hole, 26. First push rod. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to specific embodiments:

[0037] like Figures 1-4 The diagram shows a mold structure using a quick-release mechanism integrating a lower mold core 10 and an ejector pin 14. The mold includes a top plate 1, an upper backing plate 2, and an A plate 3, which are sequentially fixedly connected. Figures 5-10 As shown, a quick-release mechanism integrating the lower mold core 10 and the ejector pin 14 is provided. The quick-release mechanism is detachably locked to the B plate 4 by fasteners; in this embodiment, the fasteners are screws 8. Figure 10 As shown, the top circumferential edge of the lower mold core 10 is provided with a retaining groove 9 for the fasteners of the quick-release mechanism to abut against and restrict the movement of the quick-release mechanism. The quick-release mechanism includes: lower mold core 10, fixing plate 11, and ejector pin assembly. The lower mold core 10 cooperates with the upper mold core to form a product cavity, and multiple ejector pin holes 12 are vertically through it; the upper end face of the lower mold core 10 is provided with a pull screw hole 13; in this embodiment, the lower mold core 10, fixing plate 11, and ejector pin assembly are integrated into a modular assembly. When it is necessary to disassemble the entire quick-release mechanism, first unscrew the screws 8 that install the quick-release mechanism (such as...). Figure 6 , Figure 7 (As shown), then screw the pull screw into pull screw hole 13 (as shown). Figure 6 , Figure 7 As shown, the entire quick-release mechanism (it should be noted that the disassembled quick-release mechanism includes the lower mold core 10, the fixing plate 11, and the ejector pin assembly, but does not include the first push rod 26) is hoisted by pulling the screws, thereby removing the quick-release mechanism from the mold and realizing the overall disassembly and assembly function. This allows for the inspection and replacement of the inserts in the lower mold core 10 and the ejector pins 14 in the ejector pin assembly. The disassembly and assembly are convenient and do not require the large amount of disassembly and assembly work required by existing technologies.

[0038] A fixing plate 11 is located below the lower mold core 10 and is fixedly installed on the lower mold core 10. The fixing plate 11 has a through hole. An installation space is provided between the lower mold core 10 and the fixing plate 11 for mounting an ejector pin assembly. The ejector pin assembly includes multiple ejector pins 14, a first mounting plate 15 for mounting the multiple ejector pins 14, a first push plate 16 located below and fixedly installed on the first mounting plate 15, a first elastic element installed between the lower mold core 10 and the first mounting plate 15 and always in a compressed state, and a guide element for guiding the movement of the multiple ejector pins 14. In this embodiment, the first elastic element is a first spring 17. Figure 8 As shown, the guide is an inverted T-shaped guide rod 18. The head of the guide rod 18 is embedded in the first mounting plate 15, and its head end face abuts against the first push plate 16. The rod part of the guide rod 18 passes through the lower mold core 10. The guide ensures the linear motion accuracy of the multiple ejector pins 14. After the first push rod 26 passes through the first through hole, it abuts against the lower end face of the first push plate 16 to push the first push plate 16. When the multiple ejector pins 14 are not moving, the first push plate 16 abuts against the upper end face of the fixed plate 11 under the action of the first elastic member.

[0039] Below plate B4, a pad 5, a square iron 6, and a base plate 7 are fixedly installed in sequence. The first push rod 26 is driven by a drive assembly, which is installed between the pad 5 and the base plate 7. Figure 3 As shown, the drive assembly includes a second mounting plate 19 on which the first push rod 26 is mounted, a second push plate 20 located below and fixed on the second mounting plate 19, a second elastic member installed between the pad 5 and the second mounting plate 19 and always in a compressed state, and a reset rod 22. In this embodiment, the second elastic member is a second spring 21. The reset rod 22 is mounted on the second mounting plate 19 and passes through the second elastic member and simultaneously through the pad 5 and the B plate 4.

[0040] The base plate 7 has a second through hole 23. A second push rod (not shown in the figure) passes through the second through hole 23 and pushes against the lower end face of the second push plate 20. When the multiple ejector pins 14 are not in motion, the second push plate 20 pushes against the upper end face of the base plate 7 under the action of the second elastic member. The second push rod is driven by a driving member, which can be either pneumatic or hydraulic.

[0041] like Figure 9As shown, the lower mold core 10 has an upward-facing mounting blind hole 24 for accommodating a first elastic element. The two ends of the first elastic element abut against the bottom of the mounting blind hole 24 and the upper surface of the first mounting plate 15, respectively. The ejector pin 14 is inverted T-shaped, with its head embedded in the first mounting plate 15 and its head end face abutting against the first push plate 16. The pin shank of the ejector pin 14 passes through the lower mold core 10. The first push rod 26 is inverted T-shaped, with its head embedded in the second mounting plate 19 and its head end face abutting against the second push plate 20. The rod portion of the first push rod 26 passes through the fixed plate 11 and the pad 5. When the multiple ejector pins 14 are not in motion, the end face of the first push rod 26 furthest from the head is flush with the upper surface of the fixed plate 11. Figure 4 As shown, the lower end of the pad 5 has an upward-facing mounting hole 25 for accommodating the second elastic element. The two ends of the second elastic element abut against the bottom of the mounting hole 25 and the upper end of the second mounting plate 19, respectively. The lower end of the lower mold core 10 is shaped like a support leg to cooperate with the fixing plate 11 to form a mounting space for mounting the ejector pin assembly.

[0042] The working principle of the quick-release mechanism integrating the lower mold core 10 and ejector pins 14 in this utility model is as follows: When the multiple ejector pins 14 are not in motion, the first push plate 16 abuts against the upper end face of the fixed plate 11 under the action of the first spring 17, and the second push plate 20 abuts against the upper end face of the base plate 7 under the action of the second spring 21. At this time, the first push rod 26 does not apply a pushing force to the first push plate 16, and the second push rod does not apply a pushing force to the second push plate 20. The ejector pins 14 are located in the lower mold core 10. When the injection molding of the product is completed and the mold is opened, the driving component overcomes the elastic force of the second spring 21 and drives the second push rod to move forward. The second push rod then abuts against the second push plate 20 and moves forward. Since the first push rod 26 is fixed on the second mounting plate 19 and the second mounting plate 19 is fixed on the second push plate 20, the second push rod drives the first push rod 26 to move forward. When the first push rod 26 pushes the first push plate 16 forward against the elastic force of the first spring 17, since multiple ejector pins 14 are fixed on the first mounting plate 15 and the first mounting plate 15 is fixed on the first push plate 16, the first push rod 26 drives the multiple ejector pins 14 to eject, pushing the injection molded product out of the product cavity. After ejection, the driving component drives the second push rod to retract. At the same time, under the action of the first spring 17, the multiple ejector pins 14, the first mounting plate 15, and the first push plate 16 are reset, returning to the state where the first push plate 16 is pressed against the upper end face of the fixing plate 11 under the action of the first spring 17. At the same time, under the action of the second spring 21, the first push rod 26, the second mounting plate 19, and the second push plate 20 are reset, returning to the state where the second push plate 20 is pressed against the upper end face of the bottom plate 7 under the action of the second spring 21.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A quick-release mechanism integrating a lower mold core and an ejector pin, characterized in that, The quick-release mechanism is detachably locked to plate B by fasteners, and the quick-release mechanism includes: The lower mold core, together with the upper mold core, forms the product cavity, and has multiple ejector pin holes extending vertically through it; the upper end of the lower mold core has a pull-out screw hole facing downwards; A fixing plate is located below the lower mold core and is fixedly installed on the lower mold core, and the fixing plate has a first through hole through it; An ejector assembly is provided, wherein an installation space is provided between the lower mold core and the fixed plate for mounting the ejector assembly; the ejector assembly includes a plurality of ejector pins, a first mounting plate for mounting the plurality of ejector pins, a first push plate located below the first mounting plate and fixedly mounted on the first mounting plate, a first elastic member installed between the lower mold core and the first mounting plate and always in a compressed state, and a guide member for guiding the movement of the plurality of ejector pins. After the first push rod passes through the first through hole, it pushes against the lower end of the first push plate to push it. When the multiple push pins do not move, the first push plate pushes against the upper end of the fixed plate under the action of the first elastic element.

2. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: A pad, a square iron, and a base plate are fixedly installed in sequence below the B plate. The first push rod is driven by a drive assembly, which is installed between the pad and the base plate. The drive assembly includes a second mounting plate for mounting a first push rod, a second push plate located below the second mounting plate and fixed on the second mounting plate, a second elastic element installed between a pad and the second mounting plate and always in a compressed state, and a reset rod. The reset rod is mounted on the second mounting plate, and the reset rod passes through the second elastic member and simultaneously passes through the pad and plate B.

3. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 2, characterized in that: The bottom plate has a second through hole, and the second push rod passes through the second through hole and pushes against the lower end of the second push plate. When the multiple ejector pins are not activated, the second push plate abuts against the upper end face of the base plate under the action of the second elastic element. The second push rod is driven by a drive component.

4. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: The guide member is an inverted T-shaped guide rod. The head of the guide rod is embedded in the first mounting plate and its head end face abuts against the first push plate. The rod part of the guide rod passes through the lower mold core.

5. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: The lower end face of the lower mold core is provided with an upward-facing mounting blind hole for accommodating the first elastic element, and the two ends of the first elastic element respectively abut against the bottom of the mounting blind hole and the upper end face of the first mounting plate.

6. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: The ejector pin is inverted T-shaped, with its head embedded in the first mounting plate and its head end face abutting against the first push plate. The pin shank of the ejector pin passes through the lower mold core.

7. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: The first push rod is inverted T-shaped. The head of the first push rod is embedded in the second mounting plate and its head end face abuts against the second push plate. The rod part of the first push rod passes through the fixing plate and the pad. When the plurality of the ejector pins are not activated, the end face of the first push rod away from the head is flush with the upper end face of the fixing plate.

8. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 2, characterized in that: The lower end of the pad is provided with an upward-facing mounting hole for accommodating the second elastic element. The two ends of the second elastic element abut against the bottom of the mounting hole and the upper end of the second mounting plate, respectively.

9. The quick-release mechanism integrating the lower mold core and the ejector pin according to claim 1, characterized in that: The lower end of the lower mold core is shaped like a support leg, which cooperates with the fixed plate to form an installation space for mounting the ejector pin assembly.

10. A quick-release mechanism integrating a lower mold core and an ejector pin according to claim 1, characterized in that: The top circumferential edge of the lower mold core is provided with a retaining notch for the fasteners that mount the quick-release mechanism to abut against it and restrict the movement of the quick-release mechanism.

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