Ejection device for injection-moulding tools

Abstract

The utility model discloses an injection mold stripping device, include: support seat, support die seat is installed at the top of support seat, the beneficial effect of the utility model is: through the combination design of one damper and one return spring, and the synergies of two dampers and two return springs, effectively buffer the impact force when the thimble movement, ensure that the stripping process is stable and does not jam, adopt the sliding fit of guide frame and adjusting sliding bracket, combine the accurate butt joint of guide cylinder and guide column, realize the coaxial degree control of upper die body and lower die body, significantly improve the die closing precision, through being provided with side fixed base, spacing slide rod, top fixed support plate and adjusting sliding bracket, realized the spacing of side fixed base to top fixed support plate, top fixed support plate pulls spacing slide rod, adjusting sliding bracket and moves, through adjusting sliding bracket drive inner sliding board, fixed pillar and needle board and move, complete the movement of each thimble.

Description

Technical Field

[0001] This utility model relates to the field of demolding device technology, specifically a demolding device for injection molds. Background Technology

[0002] In injection molding, the injection mold is a key piece of equipment, and its performance directly affects the quality of the injection molded product and production efficiency. The injection molding process mainly includes stages such as mold closing, injection, pressure holding, cooling, and demolding. Among these, the demolding stage is crucial for ensuring the integrity and surface quality of the product. During demolding and mold closing, the various parts inside the mold need to be accurately reset to ensure the smooth progress of the next injection molding. The reset mechanism design of traditional demolding devices is often not perfect, resulting in inaccurate and unstable reset. Some devices rely solely on the elastic force of springs to achieve reset, but after long-term use, the springs are prone to insufficient reset force, which will affect the normal progress of the next demolding operation and have an adverse impact on the quality of the injection molded product. Utility Model Content

[0003] The purpose of this utility model is to provide a demolding device for injection molds, so as to solve the problem that the reset mechanism design of traditional demolding devices mentioned in the background art is often not perfect, and there are problems such as inaccurate and unstable reset. Some devices rely solely on the elastic force of springs to achieve reset, but after long-term use, the springs are prone to insufficient reset force, which will affect the normal operation of the next demolding operation and have an adverse effect on the quality of injection molded products.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a demolding device for injection molds, comprising:

[0005] Support base;

[0006] A support mold base is installed on top of a support base;

[0007] The lower mold body is installed on top of the support mold base;

[0008] A needle plate is slidably disposed inside the support mold base. Multiple ejector pins are fixedly connected to the top of the needle plate. The ejector pins are slidably connected to the support mold base and to the lower mold body.

[0009] A fixed support column is fixedly connected to the bottom of the needle plate, and the fixed support column is slidably connected to the support base and the support mold base respectively;

[0010] An inner sliding plate is slidably disposed inside the support base, and the bottom of the fixed column is fixedly connected to the inner sliding plate;

[0011] A top connecting support is symmetrically fixed to the top of the inner sliding plate. The top connecting support is slidably connected to the support base. An adjusting slide is installed on the top of the top connecting support.

[0012] A limiting slide rod is symmetrically fixed to the top of the adjusting slide, and a top fixing support plate is fixed to the top of the limiting slide rod;

[0013] A side fixing seat is slidably disposed on the outside of the limiting slide rod. An upper mold body is disposed above the lower mold body, and the outer side of the upper mold body is fixedly connected to the side fixing seat.

[0014] As a preferred embodiment of this utility model: multiple limiting rods are slidably arranged inside the needle plate, the limiting rods are fixedly connected to the support mold base, four No. 1 dampers are symmetrically installed inside the support mold base, the bottom of the No. 1 damper is connected to the needle plate, the top of the No. 1 damper is connected to the support mold base, and a No. 1 return spring is sleeved on the outside of the No. 1 damper.

[0015] As a preferred embodiment of this utility model: four No. 2 dampers are symmetrically installed inside the support base. The bottom of the No. 2 damper is connected to the inner sliding plate, the top of the No. 2 damper is connected to the support base, and a No. 2 return spring is sleeved on the outside of the No. 2 damper.

[0016] As a preferred embodiment of this utility model: the top of the support base is symmetrically fixed with a guide frame, and the adjusting slide is slidably connected to the guide frame.

[0017] As a preferred embodiment of this utility model: the bottom of the side fixing seat is fixedly connected to a bottom top seat that cooperates with the adjusting slide.

[0018] As a preferred embodiment of this utility model: four guide cylinders are symmetrically fixed inside the upper mold body, and four guide posts that cooperate with the guide cylinders are symmetrically fixed to the top of the lower mold body.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model effectively buffers the impact force during the movement of the ejector pins by combining the design of the first damper and the first return spring, and the synergistic effect of the second damper and the second return spring, ensuring a smooth and uninterrupted demolding process; the sliding cooperation of the guide frame and the adjusting slide, combined with the precise docking of the guide cylinder and the guide column, achieves coaxiality control of the upper mold body and the lower mold body, significantly improving the mold closing accuracy; by setting the side fixed seat, the limiting slide rod, the top fixed support plate and the adjusting slide, the side fixed seat limits the top fixed support plate, the top fixed support plate pulls the limiting slide rod and the adjusting slide to move, and the adjusting slide drives the inner sliding plate, the fixed support column and the pin plate to move, completing the movement of each ejector pin, and the ejector pins eject the molded parts in the lower mold body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the needle plate structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the support base of this utility model;

[0023] Figure 4 This is a schematic diagram of the No. 2 damper and the No. 2 reset spring of this utility model.

[0024] In the diagram: 1. Support base; 2. Support mold base; 3. Lower mold body; 4. Ejector pin; 5. Upper mold body; 6. Side fixed seat; 7. Limiting slide rod; 8. Top fixed support plate; 9. Adjusting slide; 10. Guide frame; 11. Pin plate; 12. Limiting rod; 13. No. 1 damper; 14. No. 1 return spring; 15. Bottom top seat; 16. Fixed support column; 17. Inner sliding plate; 18. No. 2 damper; 19. No. 2 return spring; 20. Top connecting support; 21. Guide cylinder; 22. Guide column. 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 4This utility model provides a technical solution: a demolding device for injection molds, comprising: a support base 1; a support mold base 2 installed on the top of the support base 1 by bolts; a lower mold body 3 installed on the top of the support mold base 2; a pin plate 11 slidably disposed inside the support mold base 2, with a plurality of ejector pins 4 fixedly connected to the top of the pin plate 11, the ejector pins 4 being slidably connected to the support mold base 2 and the lower mold body 3; a fixed support column 16 fixedly connected to the bottom of the pin plate 11, the fixed support column 16 being slidably connected to the support base 1 and the support mold base 2 respectively; and an inner sliding plate 17 sliding... The upper mold body 16 is fixedly connected to the inner sliding plate 17 at the bottom of the fixed support 1; the top connecting support 20 is symmetrically fixedly connected to the top of the inner sliding plate 17, and the top connecting support 20 is slidably connected to the support 1. The top of the top connecting support 20 is bolted to the adjusting slide 9; the limiting slide rod 7 is symmetrically fixedly connected to the top of the adjusting slide 9, and the top of the limiting slide rod 7 is fixedly connected to the top of the top fixed support plate 8; the side fixed seat 6 is slidably set outside the limiting slide rod 7, and the upper mold body 5 is set above the lower mold body 3. The outer side of the upper mold body 5 is fixedly connected to the side fixed seat 6.

[0027] It should be noted that in this embodiment, when the upper mold body 5 moves downward, its internal guide cylinder 21 and the guide post 22 at the top of the lower mold body 3 form a conical surface fit. The guide post 22 is fully inserted into the guide cylinder 21 to ensure the sealing of the mold cavity. Injection is performed into the lower mold body 3 and the upper mold body 5 through the injection channel opened in the upper mold body 5. When the upper mold body 5 moves downward, it drives the side fixing seat 6 and the bottom top seat 15 to move downward synchronously. The bottom top seat 15 pushes the top of the adjusting slide 9. The side fixing seat 6 slides at the upper limit of the limiting slide rod 7. By pushing the adjusting slide 9, the top connecting support 20, the inner sliding plate 17, the fixed support column 16, the pin plate 11, and the various ejector pins 4 are prevented from not being reset. This improves the injection stability of the lower mold body 3 and the upper mold body 5. When demolding is required after injection, the upper mold body 5 moves away from the lower mold body 3, and the limiting slide rod 7 slides inside the side fixing seat 6. When the side fixing seat 6 contacts the top fixing support plate 8, As the molded part continues to move at the bottom, the top fixed support plate 8 drives the limit slide rod 7 and the adjusting slide 9 to move upward. The adjusting slide 9 drives the top connecting support 20, the inner sliding plate 17 and the fixed support column 16 to move upward. When the fixed support column 16 moves, it drives the needle plate 11 and the ejector pin 4 to move upward. The ejector pin 4 ejects the molded part in the lower mold body 3. When the inner sliding plate 17 moves upward, it pushes the second damper 18 and the second return spring 19. Combined with the needle plate 11, it presses the first damper 13 and the first return spring 14, slowing down the movement of the needle plate 11 and the ejector pin 4, thus completing the stable ejection of the injection molded part. After ejection, the upper mold body 5 drives the side fixed seat 6 to move closer to the lower mold body 3, which facilitates the reset of the second damper 18, the second return spring 19, the first damper 13 and the first return spring 14, thereby resetting the needle plate 11, the ejector pin 4, the fixed support column 16 and the inner sliding plate 17.

[0028] In one embodiment, such as Figures 1 to 4 As shown, multiple limiting rods 12 are slidably arranged inside the needle plate 11. The limiting rods 12 are fixedly connected to the support mold base 2. Four first dampers 13 are symmetrically installed inside the support mold base 2. The bottom of the first damper 13 is connected to the needle plate 11, the top of the first damper 13 is connected to the support mold base 2, and a first return spring 14 is sleeved on the outside of the first damper 13.

[0029] It should be noted that in this embodiment, by setting a damper 13 and a return spring 14 in the support mold base 2, the movement of the ejector pin 4 is controlled. The damper absorbs the impact energy when the ejector pin 4 is ejected, avoiding rigid collisions that could damage the mold or product surface.

[0030] In one embodiment, such as Figures 1 to 4As shown, four second dampers 18 are symmetrically installed inside the support base 1. The bottom of the second damper 18 is connected to the inner sliding plate 17, the top of the second damper 18 is connected to the support base 1, and a second return spring 19 is sleeved on the outside of the second damper 18.

[0031] It should be noted that in this embodiment, the inner sliding plate 17 and the fixed support column 16 are reset by the second damper 18 and the second return spring 19, thereby resetting the needle plate 11 and each of the top pins 4.

[0032] In one embodiment, such as Figures 1 to 4 As shown, a guide frame 10 is symmetrically fixed to the top of the support base 1, and the adjusting slide 9 is slidably connected to the guide frame 10.

[0033] It should be noted that in this embodiment, the guide frame 10 restricts the movement of the adjusting slide 9, thereby improving the stability of the adjusting slide 9 and preventing it from jamming or tilting.

[0034] In one embodiment, such as Figures 1 to 4 As shown, the bottom of the side fixing seat 6 is fixedly connected to the bottom top seat 15, which cooperates with the adjusting slide 9.

[0035] It should be noted that in this embodiment, the bottom top seat 15 provided at the bottom of the side fixing seat 6 is used to push the position of the adjusting slide 9, ensuring that the adjusting slide 9, the top connecting support 20, and the inner sliding plate 17 are reset. The inner sliding plate 17 is used to completely reset the fixing support 16 and the needle plate 11, so as to avoid affecting the injection molding operation.

[0036] In one embodiment, such as Figures 1 to 4 As shown, four guide cylinders 21 are symmetrically fixed inside the upper mold body 5, and four guide pillars 22 that cooperate with the guide cylinders 21 are symmetrically fixed to the top of the lower mold body 3.

[0037] It should be noted that in this embodiment, the mold closing stability between the lower mold body 3 and the upper mold body 5 is ensured by the cooperation between the guide cylinder 21 and the guide post 22.

[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. A demolding device for injection molds, characterized in that, include: Support base (1); Support mold base (2), the support mold base (2) is installed on top of support base (1); The lower mold body (3) is installed on top of the support mold base (2); A needle plate (11) is slidably disposed on the inner side of the support mold base (2). A plurality of ejector pins (4) are fixedly connected to the top of the needle plate (11). The ejector pins (4) are slidably connected to the support mold base (2) and to the lower mold body (3). A fixed support column (16) is fixedly connected to the bottom of the needle plate (11), and the fixed support column (16) is slidably connected to the support base (1) and the support mold base (2) respectively; The inner sliding plate (17) is slidably disposed inside the support base (1), and the bottom of the fixed column (16) is fixedly connected to the inner sliding plate (17); A top connecting support (20) is symmetrically fixed to the top of the inner sliding plate (17). The top connecting support (20) is slidably connected to the support base (1). An adjusting slide (9) is installed on the top of the top connecting support (20). Limiting slide rod (7) is symmetrically fixed to the top of the adjusting slide (9), and a top fixing support plate (8) is fixed to the top of the limiting slide rod (7); A side fixing seat (6) is slidably disposed on the outside of the limiting slide rod (7). An upper mold body (5) is disposed above the lower mold body (3). The outer side of the upper mold body (5) is fixedly connected to the side fixing seat (6).

2. The injection mold demolding device according to claim 1, characterized in that: Multiple limiting rods (12) are slidably arranged inside the needle plate (11). The limiting rods (12) are fixedly connected to the support mold base (2). Four first dampers (13) are symmetrically installed inside the support mold base (2). The bottom of the first damper (13) is connected to the needle plate (11), and the top of the first damper (13) is connected to the support mold base (2). A first return spring (14) is sleeved on the outside of the first damper (13).

3. The injection mold demolding device according to claim 1, characterized in that: Four second dampers (18) are symmetrically installed inside the support base (1). The bottom of the second damper (18) is connected to the inner sliding plate (17), the top of the second damper (18) is connected to the support base (1), and a second return spring (19) is sleeved on the outside of the second damper (18).

4. The injection mold demolding device according to claim 1, characterized in that: The top of the support base (1) is symmetrically fixed with a guide frame (10), and the adjusting slide (9) is slidably connected to the guide frame (10).

5. The injection mold demolding device according to claim 1, characterized in that: The bottom of the side fixing seat (6) is fixedly connected to a bottom top seat (15) that cooperates with the adjusting slide (9).

6. The injection mold demolding device according to claim 1, characterized in that: The upper mold body (5) has four guide cylinders (21) symmetrically fixed inside, and the lower mold body (3) has four guide pillars (22) symmetrically fixed at the top, which cooperate with the guide cylinders (21).

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