Ejection mechanism for injection mould

Abstract

The utility model discloses an injection mold ejection mechanism, include: lower mould, support frame is installed in the outside of lower mould, the top of support frame is equipped with the cylinder, the utility model discloses beneficial effect is: through having set up side fixed support box, spacing sliding slot, inner sliding board and spacing sliding block, has realized that upper mould moves up and down, and upper mould drives side fixed support box, spacing sliding slot synchronous removal, when upper mould moves up, and side fixed support box drives spacing sliding block, inner sliding board and moves up through inside spacing sliding slot, and pull inner sliding board, sliding needle plate and move up, through each ejector pin of sliding needle plate top to the ejection processing of the forming injection molded part on lower mould, after the mold opening of upper mould and lower mould, automatically complete ejection work.

Description

Technical Field

[0001] This utility model relates to the technical field of mold ejection mechanisms, specifically an ejection mechanism for injection molds. Background Technology

[0002] Injection molds are key equipment in the plastics processing industry used for injection molding processes. They inject molten plastic material into the mold cavity, and after cooling and solidification, plastic products of the desired shape are obtained. Traditional injection mold ejection mechanisms usually use spring-driven ejector pins to eject the molded product from the mold. However, after long-term use, spring ejection mechanisms are prone to spring fatigue and incomplete reset, which can cause the ejector pins to fail to reset accurately, thus affecting the quality of the next injection molding. Utility Model Content

[0003] The purpose of this utility model is to provide an ejection mechanism for injection molds, in order to solve the problem mentioned in the background art that the traditional ejection mechanism for injection molds usually adopts a spring-driven method to eject the molded product from the mold through ejector pins. However, after long-term use, the spring ejection mechanism is prone to spring fatigue and incomplete reset, which leads to the ejector pins not being able to reset accurately, thus affecting the quality of the next injection molding.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ejection mechanism for an injection mold, comprising:

[0005] Lower mold;

[0006] A support frame is installed on the outside of the lower mold, and a cylinder is installed on the top of the support frame;

[0007] A support top frame is installed at the output end of the cylinder, and an upper mold that mates with the lower mold is installed at the bottom of the support top frame;

[0008] Side-fixed support boxes are symmetrically installed on the outside of the upper mold, and an inner sliding plate is slidably arranged inside the side-fixed support boxes;

[0009] A sliding pin plate is slidably disposed on the inner side of the lower mold, and a plurality of ejector pins are provided on the top of the sliding pin plate, the ejector pins being slidably connected to the lower mold;

[0010] The limiting slide groove is symmetrically opened inside the side fixed support box. The outer side of the inner sliding plate is symmetrically fixed with a limiting slider that cooperates with the limiting slide groove. The limiting slide groove and the limiting slider are slidably connected.

[0011] As a preferred embodiment of this utility model, it further includes a side fixing seat, which is symmetrically fixed to the outside of the side fixing support box. A bottom fixing cylinder is fixed to the bottom of the side fixing seat. A limiting top post is slidably arranged on the inner side of the bottom fixing cylinder. A No. 1 spring is arranged inside the bottom fixing cylinder. One end of the No. 1 spring is connected to the limiting top post. Multiple guide blocks are fixed at equal intervals on the outer side of the limiting top post. Multiple guide grooves are slidably opened on the inner side of the bottom fixing cylinder. The guide blocks are slidably connected to the guide grooves.

[0012] As a preferred embodiment of this utility model: multiple dampers are symmetrically arranged inside the lower mold, one end of each damper is connected to a sliding needle plate, and multiple second springs are symmetrically installed on the top of the sliding needle plate, one end of each second spring is connected to the lower mold.

[0013] As a preferred embodiment of this utility model: a fixed support plate is symmetrically fixed to the inner side of the support frame, a limit block is slidably arranged inside the fixed support plate, the inner side of the limit block is fixedly connected to the side fixed support box, a limit rod is symmetrically slidably arranged inside the limit block, and the limit rod is fixedly connected to the fixed support plate.

[0014] As a preferred embodiment of this utility model: the top of the supporting top frame is symmetrically fixed with limiting slide rods, and the limiting slide rods are slidably connected to the supporting frame.

[0015] As a preferred embodiment of this utility model: the top of the upper mold is provided with an injection pipe, and the sliding needle plate is symmetrically provided with limiting slide pins inside, and the limiting slide pins are fixedly connected to the lower mold.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a side fixed support box, a limiting slide groove, an inner sliding plate, and a limiting slider, this utility model achieves the synchronous movement of the side fixed support box and the limiting slide groove when the upper mold moves up and down. When the upper mold moves upward, the side fixed support box drives the limiting slider and the inner sliding plate to move upward through the internal limiting slide groove, pulling the inner sliding plate and the sliding pin plate upward. The ejectors at the top of the sliding pin plate then eject the molded injection part from the lower mold. After the mold and the lower mold open, the ejection process is completed automatically. By setting up a bottom fixed cylinder, a limiting ejector pin, and a No. 1 spring, the side fixed support box drives the side fixed seat, the bottom fixed cylinder, the No. 1 spring, and the limiting ejector pin to move downward. The limiting ejector pin pushes the sliding pin plate, and the No. 1 spring buffers the limiting ejector pin. After the limiting ejector pin reaches the limit position, it pushes the sliding pin plate into place, avoiding the situation where the No. 2 spring is not fully reset. This stabilizes the sliding pin plate and prevents the ejector pins from interfering with the injection molding process between the lower and upper molds. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a bottom view of the upper mold of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixed support plate structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the side-fixed support box of this utility model;

[0021] Figure 5 This is a schematic diagram of the lower mold structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the sliding needle plate structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the internal structure of the bottom fixing cylinder of this utility model.

[0024] In the diagram: 1. Lower mold; 2. Support frame; 3. Cylinder; 4. Support top frame; 5. Limiting slide bar; 6. Upper mold; 7. Injection piping; 8. Side fixed support box; 9. Limiting slide groove; 10. Inner sliding plate; 11. Limiting slider; 12. Sliding pin plate; 13. Side fixed seat; 14. Bottom fixed cylinder; 15. Limiting top post; 16. Spring No. 1; 17. Limiting slide bar; 18. Damper; 19. Spring No. 2; 20. Ejector pin; 21. Fixed support plate; 22. Limiting block; 23. Limiting rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 7This utility model provides a technical solution: an ejection mechanism for an injection mold, comprising: a lower mold 1; a support frame 2 fixedly installed on the outside of the lower mold 1 by bolts, and a cylinder 3 installed on the top of the support frame 2 by bolts; a support ejector 4 fixedly installed on the output end of the cylinder 3, and an upper mold 6 cooperating with the lower mold 1 installed on the bottom of the support ejector 4 by bolts; a side fixing box 8 symmetrically fixedly installed on the outside of the upper mold 6 by bolts, and an inner sliding plate 10 slidably arranged inside the side fixing box 8; a sliding pin plate 12 slidably arranged on the inside of the lower mold 1, and a plurality of ejector pins 20 fixedly connected to the top of the sliding pin plate 12, the ejector pins 20 being slidably connected to the lower mold 1; and a limiting groove 9 symmetrically opened inside the side fixing box 8, and a limiting slider 11 cooperating with the limiting groove 9 being symmetrically fixedly connected to the outside of the inner sliding plate 10, the limiting groove 9 and the limiting slider 11 being slidably connected.

[0027] It should be noted that in this embodiment, the device is controlled by an external controller and powered by an external power supply. The output end of the cylinder 3 drives the support frame 4 and the upper mold 6 to move downward. The upper mold 6 drives the side fixed support box 8 to slide outside the inner sliding plate 10. The side fixed support box 8 drives the outer side fixed seat 13 to move downward. The side fixed seat 13 drives the bottom fixed cylinder 14, the first spring 16, and the limiting top post 15 to move downward. The bottom end of the limiting top post 15 presses against the sliding needle plate 12. The limiting ejector pin 15 drives the guide block to slide within the guide groove. When it reaches the limiting position, the lower mold 1 and the upper mold 6 close. At the same time, the sliding pin plate 12 drives each ejector pin 20 to reset, preventing instability in the position reset of the ejector pins 20 caused by the second spring 19. The injection molding material is guided to the cavity between the upper mold 6 and the lower mold 1 through the injection molding pipeline 7. The lower mold 1 and the upper mold 6 perform molding on the injection molding material. When mold opening and ejection are required after molding, the output end of the cylinder 3 is used for this process. The supporting top frame 4 and the upper mold 6 move upwards. The upper mold 6 moves the side fixed support box 8 upwards. The side fixed support box 8 moves the side fixed seat 13 and the bottom fixed cylinder 14 upwards. At this time, the first spring 16 resets and drives the limiting top post 15 to reset. The side fixed support box 8 moves upwards until the bottom of the limiting slider 11 touches the bottom of the limiting groove 9. The side fixed support box 8 pulls the limiting slider 11 and the inner sliding plate 10 upwards through the limiting groove 9. The inner sliding plate 10 drives the sliding pin plate 12 to move upwards. The lower mold 1 slides upward, and the sliding needle plate 12 presses the damper 18 and the second spring 19. The sliding needle plate 12 drives the ejector pin 20 to move upward, and the ejector pin 20 ejects the molded injection part in the lower mold 1. Then the output end of the cylinder 3 stops moving. After the ejected molded injection part is removed, the output end of the cylinder 3 drives the support bracket 4 and the upper mold 6 to move downward a certain distance. At this time, the second spring 19 and the damper 18 reset and drive the sliding needle plate 12 and the inner sliding plate 10 to reset downward.

[0028] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, it also includes a side fixing seat 13, which is symmetrically fixed to the outside of the side fixing support box 8. A bottom fixing cylinder 14 is fixed to the bottom of the side fixing seat 13. A limiting top post 15 is slidably arranged on the inner side of the bottom fixing cylinder 14. A first spring 16 is arranged inside the bottom fixing cylinder 14. One end of the first spring 16 is connected to the limiting top post 15. Multiple guide blocks are fixed at equal intervals on the outer side of the limiting top post 15. Multiple guide grooves are slidably opened on the inner side of the bottom fixing cylinder 14. The guide blocks are slidably connected to the guide grooves.

[0029] It should be noted that in this embodiment, the guide block on the outside of the limiting top post 15 slides in a guide groove opened on the inside of the bottom fixing cylinder 14. The limiting top post 15 is reset by the first spring 16. The bottom fixing cylinder 14 and the limiting top post 15 assist in pushing the sliding needle plate 12 to ensure that the sliding needle plate 12 completes the reset action.

[0030] In one embodiment, such as Figure 6 As shown, multiple dampers 18 are symmetrically arranged inside the lower mold 1. One end of the damper 18 is connected to the sliding needle plate 12. Multiple second springs 19 are symmetrically installed on the top of the sliding needle plate 12. One end of the second spring 19 is connected to the lower mold 1.

[0031] It should be noted that in this embodiment, the movement of the sliding needle plate 12 is buffered by the damper 18 and the second spring 19, and the sliding needle plate 12 is reset after the ejector pin 20 at the top of the sliding needle plate 12 completes the ejection of the molded part.

[0032] In one embodiment, such as Figure 2 and Figure 3 As shown, a fixed support plate 21 is symmetrically fixed to the inner side of the support frame 2. A limit block 22 is slidably arranged inside the fixed support plate 21. The inner side of the limit block 22 is fixed to the side fixed support box 8. A limit rod 23 is symmetrically slidably arranged inside the limit block 22. The limit rod 23 is fixed to the fixed support plate 21.

[0033] It should be noted that in this embodiment, the limiting block 22 slides on the outside of the limiting rod 23, and the side fixed support box 8 drives the limiting block 22 to move synchronously, guiding the movement position of the side fixed support box 8 and improving the overall stability.

[0034] In one embodiment, such as Figures 1 to 4 As shown, the top of the support frame 4 is symmetrically fixed with a limiting slide rod 5, and the limiting slide rod 5 is slidably connected to the support frame 2.

[0035] It should be noted that in this embodiment, the output end of the cylinder 3 drives the support top frame 4 and the upper mold 6 to move and adjust their positions up and down. The support top frame 4 drives the limiting slide rod 5 to slide in a limited position with the support frame 2, thereby improving the stability of the adjustment of the support top frame 4 and the upper mold 6.

[0036] In one embodiment, such as Figure 1 , Figure 2 and Figure 6 As shown, the top of the upper mold 6 is provided with an injection pipe 7, and the sliding needle plate 12 is symmetrically provided with a limiting slide post 17 inside, which is fixedly connected to the lower mold 1.

[0037] It should be noted that in this embodiment, the sliding position of the sliding needle plate 12 is guided by the limiting slide post 17, which improves the stability of the movement of the sliding needle plate 12.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ejection mechanism for an injection mold, characterized in that, include: Lower mold (1); A support frame (2) is installed on the outside of the lower mold (1), and a cylinder (3) is installed on the top of the support frame (2). Support top frame (4) is installed at the output end of cylinder (3), and an upper mold (6) that cooperates with lower mold (1) is installed at the bottom of the support top frame (4). Side fixed support box (8) is symmetrically installed on the outside of the upper mold (6), and an inner sliding plate (10) is slidably arranged inside the side fixed support box (8). A sliding needle plate (12) is slidably disposed on the inner side of the lower mold (1). A plurality of ejector pins (20) are provided on the top of the sliding needle plate (12). The ejector pins (20) are slidably connected to the lower mold (1). The limiting slide groove (9) is symmetrically opened inside the side fixed support box (8). The outer side of the inner sliding plate (10) is symmetrically fixed with a limiting slider (11) that cooperates with the limiting slide groove (9). The limiting slide groove (9) and the limiting slider (11) are slidably connected. It also includes a side fixing seat (13), which is symmetrically fixed to the outside of the side fixing support box (8). The bottom of the side fixing seat (13) is fixed to a bottom fixing cylinder (14). A limiting top post (15) is slidably provided on the inner side of the bottom fixing cylinder (14). A first spring (16) is provided inside the bottom fixing cylinder (14). One end of the first spring (16) is connected to the limiting top post (15). Multiple guide blocks are fixed at equal intervals on the outer side of the limiting top post (15). Multiple guide grooves are opened at equal intervals on the inner side of the bottom fixing cylinder (14). The guide blocks are slidably connected to the guide grooves.

2. The ejection mechanism of an injection mold according to claim 1, characterized in that: Multiple dampers (18) are symmetrically arranged inside the lower mold (1). One end of the damper (18) is connected to the sliding needle plate (12). Multiple second springs (19) are symmetrically installed on the top of the sliding needle plate (12). One end of the second spring (19) is connected to the lower mold (1).

3. The ejection mechanism of an injection mold according to claim 1, characterized in that: The inner side of the support frame (2) is symmetrically fixed with a fixed support plate (21). A limit block (22) is slidably arranged inside the fixed support plate (21). The inner side of the limit block (22) is fixedly connected to the side fixed support box (8). A limit rod (23) is symmetrically slidably arranged inside the limit block (22). The limit rod (23) is fixedly connected to the fixed support plate (21).

4. The ejection mechanism of an injection mold according to claim 1, characterized in that: The top of the support frame (4) is symmetrically fixed with a limiting slide rod (5), and the limiting slide rod (5) is slidably connected to the support frame (2).

5. The ejection mechanism of an injection mold according to claim 1, characterized in that: The top of the upper mold (6) is provided with an injection pipe (7), and the sliding pin plate (12) is symmetrically provided with a limiting slide post (17), which is fixedly connected to the lower mold (1).

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