A secondary ejection ram mechanism

Abstract

The utility model belongs to the field of automobile injection mold, concretely relates to a secondary ejection plunger mechanism, including plunger one, plunger two, plunger needle and plunger pressure plate, the inside hollow of plunger one is suitable for the outside wall of plunger two, the inside hollow of plunger two is suitable for the outside wall of plunger needle, plunger one is movably sleeved on the outside wall of plunger two, plunger needle is movably inserted in the inside of plunger two, the length of plunger one, plunger two and plunger needle increases gradually, plunger pressure plate fixes the bottom of plunger needle, the inside of the top end of plunger two is provided with slot hole, the utility model has the advantages of simple structure, separating the inside wall and the outside wall of product welding column for demolding, dispersing the holding force of product to plunger as far as possible, and satisfying the smooth ejection of product.

Description

Technical Field

[0001] This utility model belongs to the field of automotive injection molds, specifically relating to a secondary ejector sleeve mechanism. Background Technology

[0002] like Figure 1 As shown, the welded pillars on the product are approximately 20mm deep and 1mm thick. Due to structural limitations, support ribs are designed at the welded pillar locations. The product is an IMG-covered skeleton product with a main wall thickness of 2.2mm. For conventional ejector sleeve structures in plastic molds, directly ejecting the product using the ejector sleeve presents several problems: 1. The welded pillars are relatively deep, with support ribs on the sides, resulting in significant clamping force and difficulty in ejection; 2. The welded pillar wall is relatively thin, only 1mm, leading to a thin-walled ejector sleeve with poor strength and susceptibility to breakage; 3. The thin main wall of the product results in poor strength, making the welded pillar location (A side) prone to deformation after ejection. Therefore, the existing ejector sleeve structure cannot produce qualified products. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a secondary ejector sleeve mechanism with a simple structure. It separates the inner and outer walls of the product welding column for demolding, thereby dispersing the clamping force of the product on the sleeve as much as possible and ensuring smooth ejection of the product.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a secondary ejector sleeve mechanism, comprising an ejector sleeve one, an ejector sleeve two, an ejector needle, and an ejector needle pressure plate. The ejector sleeve one is hollow inside and is adapted to the outer wall of the ejector sleeve two. The ejector sleeve two is hollow inside and is adapted to the outer wall of the ejector needle. The ejector sleeve one is movably sleeved on the outer wall of the ejector sleeve two. The ejector needle is movably inserted into the interior of the ejector sleeve two. The lengths of the ejector sleeve one, the ejector sleeve two, and the ejector needle increase sequentially. The ejector needle pressure plate fixes the bottom of the ejector needle. A slot is provided inside the top of the ejector sleeve two.

[0005] Furthermore, the bottom of the second sleeve is inserted and fixed to the primary top rod fixing plate, and a primary push plate is provided below the second sleeve. The primary push plate is movably inserted into the sleeve needle. The bottom of the first sleeve is inserted and fixed to the secondary top rod fixing plate, and a secondary push plate is provided below the first sleeve. The secondary push plate is movably sleeved on the second sleeve, and the secondary push plate is located above the primary top rod fixing plate.

[0006] Compared with existing technologies, the advantages of this invention are: by setting ejector sleeve one, ejector sleeve two, and ejector sleeve pin, the invention detaches from the inner and outer walls of the welding column in stages, thereby reducing the clamping force of the product on the ejector sleeve. This invention ensures the quality of the product after ejection and the service life of the ejector sleeve. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the existing technology structure;

[0008] Figure 2 This is a schematic diagram of the structure of this utility model after injection molding;

[0009] Figure 3 This is a schematic diagram of the primary top-rear structure of this utility model;

[0010] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0011] Figure 5 This is a schematic diagram of the secondary top-rear structure of this utility model;

[0012] Figure 6 for Figure 5 Enlarged view at point B in the middle;

[0013] Figure 7 This is an exploded view of the present invention. Detailed Implementation

[0014] 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.

[0015] like Figure 1 As shown, the product 1 currently requiring injection molding is an IMG-coated skeleton product with welded pillars 11 and supporting ribs 12. The welded pillars 11 are approximately 20mm deep and 1mm thick, while the main wall thickness of product 1 is 2.2mm. Both the walls of the welded pillars 11 and the main wall of product 1 are very thin. If a conventional ejector sleeve structure is used, the following problems will occur: 1. The welded pillars 11 are relatively deep, and the supporting ribs 12 are present on the side, resulting in a large clamping force and difficulty in ejection; 2. The thin wall thickness of the welded pillars 11, only 1mm, results in a thin-walled ejector sleeve with poor strength and prone to breakage; 3. The thin main wall of product 1 has poor strength, and after the welded pillars 11 are ejected, the A-side of the welded pillars 11 is easily deformed by the ejection. Therefore, the existing ejector sleeve structure cannot produce qualified products, and an improvement to the ejector sleeve structure is urgently needed.

[0016] Please see Figure 2-7This utility model provides the following technical solution: a secondary ejector sleeve mechanism, including ejector sleeve 2, ejector sleeve 3, ejector pin 4, and ejector pin pressure plate 5. Ejector sleeve 2 is hollow inside and fits the outer wall of ejector sleeve 3. Ejector sleeve 3 is hollow inside and fits the outer wall of ejector pin 4. Ejector sleeve 2 is movably sleeved on the outer wall of ejector sleeve 3. Ejector pin 4 is movably inserted into the interior of ejector sleeve 3. The lengths of ejector sleeve 2, ejector sleeve 3, and ejector pin 4 increase sequentially. After injection molding, ejector sleeve 2, ejector sleeve 3, and ejector pin 4... The top end of the ejector pin 4 is fixed to the product 1. The top end of the ejector pin 4 is fixed inside the welding column 11 of the product 1. The top end of the ejector pin 2 3 has a slot 31. The slot 31 is adapted to the welding column 11 and the support rib 12 on the product 1. The wall of the slot 31 at the top end of the ejector pin 2 3 is fixed to the outer wall of the welding column 11 and the support rib 12. The top end of the ejector pin 1 2 is fixed to the product 1. The ejector pin pressure plate 5 fixes the bottom of the ejector pin 4 to the base plate 6. The ejector pin 4 remains fixed during the ejection process. The movement process of this utility model is as follows: When the mold is ejecting, ejector sleeve 1 2 and ejector sleeve 2 3 are ejected upward together. At this time, ejector sleeve 1 2, ejector sleeve 2 3 and product 1 are ejected synchronously. The inner wall of the welding column 11 on product 1 is separated from the ejector pin 4 first. Then, ejector sleeve 1 2 is ejected upward alone. At this time, ejector sleeve 1 2 and product 1 are ejected synchronously. This time, the outer wall of the welding column 11 and the support rib 12 on the product are separated from ejector sleeve 2 3. By separating the inner and outer walls of the welding column 11 in steps, the clamping force of product 1 on the ejector sleeve is reduced. This ensures the quality of the product after ejection and extends the service life of the ejector sleeve.

[0017] Specifically, the bottom of ejector sleeve 2 3 is inserted and fixed to the primary ejector rod fixing plate 8. A primary push plate 7 is located below ejector sleeve 2 3, and is movably inserted into by ejector needle 4. The primary ejector rod fixing plate 8 and the primary push plate 7 move synchronously. The bottom of ejector sleeve 1 2 is inserted and fixed to the secondary ejector rod fixing plate 10. A secondary push plate 9 is located below ejector sleeve 1 2, and is movably sleeved onto ejector sleeve 2 3. The secondary ejector rod fixing plate 10 and the secondary push plate 9 move synchronously. The secondary push plate 9 is located above the primary ejector rod fixing plate 8, and the two are separate. When the primary ejector is ejected, the primary push plate 7 and the secondary push plate 9 together push the primary ejector rod fixing plate 8 and the secondary ejector rod fixing plate 10 upwards, respectively. When the secondary ejector is ejected, the secondary push plate 9 alone pushes the secondary ejector rod fixing plate 10 upwards.

[0018] The installation steps of this utility model are as follows: First, insert the first ejector sleeve 2 into the secondary jacking rod fixing plate 10, and then insert it together into the secondary jacking plate 9; next, insert the second ejector sleeve 3 into the primary jacking rod fixing plate 8, and then insert it together into the primary jacking plate 7; then install the base plate 6, insert the ejector needle 4 into the base plate 6, and then fix the bottom of the ejector needle 4 to the bottom of the base plate 6 by the ejector needle pressure plate 5, thus fixing the bottom of the ejector needle 4. The installation is then complete.

[0019] When the main wall thickness of the product is less than 2.5mm and there are one or more welded columns with a height of 25-30mm, the secondary ejector sleeve structure can solve the problems of concentrated sticking force on the sleeve during ejection, easy breakage of ordinary 1mm wall thickness sleeves, and bulging of the product surface after ejection due to thin main wall thickness.

[0020] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A secondary ejector sleeve mechanism, characterized in that, Includes a first sleeve (2), a second sleeve (3), a sleeve needle (4), and a sleeve needle pressure plate (5). The first sleeve (2) is hollow inside and fits the outer wall of the second sleeve (3). The second sleeve (3) is hollow inside and fits the outer wall of the sleeve needle (4). The first sleeve (2) is movably sleeved on the outer wall of the second sleeve (3). The sleeve needle (4) is movably inserted into the second sleeve (3). The lengths of the first sleeve (2), the second sleeve (3), and the sleeve needle (4) increase sequentially. The sleeve needle pressure plate (5) fixes the bottom of the sleeve needle (4). The top of the second sleeve (3) has a slot (31).

2. The secondary ejector sleeve mechanism according to claim 1, characterized in that, The bottom of the second sleeve (3) is inserted and fixed on the primary top rod fixing plate (8). A primary push plate (7) is provided below the second sleeve (3). The primary push plate (7) is movably inserted by the sleeve needle (4). The bottom of the first sleeve (2) is inserted and fixed on the secondary top rod fixing plate (10). A secondary push plate (9) is provided below the first sleeve (2). The secondary push plate (9) is movably sleeved on the second sleeve (3). The secondary push plate (9) is located above the primary top rod fixing plate (8).

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