A damage-proof ejection device for injection mold of automobile accessories

Abstract

The utility model relates to injection mold ejection device technical field, concretely relates to a kind of anti-injury auto parts injection mold ejection device, including ejector pin one board, ejector pin two board, ejector pin three board, male template and fixed plate, male template is fixedly installed with fixed plate, male template upper surface is equipped with product profile, ejector pin three board upper surface is fixedly installed with No. The utility model realizes the gradient separation of product and mold profile by multiple ejector pin cooperation movable block, when overall ejection, the viscosity of product surface and mold profile is reduced for the first time, when No. 1 ejector pin is retracted, the viscosity of product surface and mold profile is reduced for the second time, thereby avoiding product to be bumped.

Description

Technical Field

[0001] This utility model relates to the technical field of injection mold ejection devices, specifically a damage-resistant injection mold ejection device for automotive parts. Background Technology

[0002] In the auto parts manufacturing industry, thin injection molded parts are widely used due to their advantages such as light weight and good adaptability to installation space. To improve the structural strength of these thin products, multiple reinforcing ribs are usually arranged on the inside of the product. After being formed by injection molding, the product needs to be removed from the mold. Currently, the commonly used removal method in the injection molding industry is ejector pin ejection. However, when the existing ejection device is used to process thin auto parts injection molded products with many reinforcing ribs, the product is prone to bulging and damage at weak points. There are two main reasons for this problem. First, the thin product is in close contact with the mold surface. After the product is formed, there is a large adhesion between the surface of the product and the mold surface. When ejecting simultaneously, the product is subjected to the overall force, and the weak points cannot withstand the resistance caused by the adhesion. Second, when the reinforcing ribs on the inside of the product are formed, they are inserted into the corresponding grooves of the mold surface. The contact area between the reinforcing ribs and the mold surface is further increased, which leads to a significant increase in the adhesion between the product and the mold. As a result, the weak points are subjected to the dual effects of ejector pin thrust and viscous resistance during the ejection process, which easily causes deformation and bulging, affecting product quality and reducing the production qualification rate.

[0003] Therefore, a damage-resistant ejection device for automotive parts injection molds is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a damage-preventing ejection device for automotive parts injection molds. Through multiple sets of ejector pins and movable blocks, a gradient separation between the product and the mold surface is achieved. During overall ejection, most of the product surface detaches from the mold surface, reducing the adhesion between the product surface and the mold surface for the first time. When the first ejector pin retracts, it pulls a portion of the mold surface back, reducing the adhesion between the product surface and the mold surface for the second time. When the second ejector pin retracts, the product is supported by the third and fourth ejector pins. After these two reductions, the adhesion between the product surface and the mold surface is significantly reduced, thus preventing the product from bulging out and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a first ejector plate, a second ejector plate, a third ejector plate, a male template, and a fixing plate. The first ejector plate, the second ejector plate, and the third ejector plate are all located between the male template and the fixing plate. The male template is fixedly installed with the fixing plate, and the upper surface of the male template is provided with a product profile. A first ejector pin is fixedly installed on the upper surface of the three ejector plates, and a second ejector pin is fixedly installed on the upper surface of the first ejector plate. The product surface is divided into multiple movable blocks, and the ends of the first and second ejector pins away from the fixed plate are fixedly connected to the surface of the movable blocks. The first ejector plate is slidably connected to ejector pins No. 3 and No. 4. The second ejector plate is used to abut against ejector pins No. 3 and No. 4. A second spring is provided between the end of ejector pins No. 3 and No. 4 near the second ejector plate and the first ejector plate.

[0006] Preferably, the surface of the first ejector plate near the second ejector plate has multiple grooves, the surface of the second ejector plate near the first ejector plate has multiple protrusions that fit the grooves, the third ejector pin and the fourth ejector pin pass through the first ejector plate from the grooves, and the second spring is located in the grooves.

[0007] Preferably, the second ejector pin is sleeved on the outside of the third ejector pin, the third ejector pin passes through the second ejector pin, and the ends of the third ejector pin and the fourth ejector pin that are close to the product surface are in contact with the product surface.

[0008] Preferably, a limiting block is fixedly installed on the surface of the third ejector plate near the first ejector plate, and the combined thickness of the second ejector plate and the protrusion is equal to the height of the limiting block.

[0009] Preferably, a guide post is fixedly installed on the lower surface of the male template, the guide post passing through the first ejector plate, the second ejector plate, and the third ejector plate, and a first spring is provided between the first ejector plate and the male template.

[0010] Preferably, a first telescopic rod, a second electromagnet, and a third electromagnet are fixedly installed on the surface of the fixing plate near the third ejector plate. The telescopic end of the first telescopic rod is fixedly connected to the third ejector plate. The telescopic end of the second electromagnet passes through the third ejector plate and abuts against the second ejector plate. The telescopic end of the third electromagnet abuts against the first ejector plate.

[0011] Compared with the prior art, this utility model provides a damage-resistant ejection device for automotive injection molds, which has the following beneficial effects: 1. Multiple sets of ejector pins work in conjunction with movable blocks to achieve gradient separation of the product from the mold surface. During overall ejection, most of the product surface is separated from the mold surface, reducing the adhesion between the product surface and the mold surface for the first time. When ejector pin 1 retracts, ejector pin 1 drives part of the mold surface to retract, reducing the adhesion between the product surface and the mold surface for the second time. When ejector pin 2 retracts, the product is supported by ejector pins 3 and 4. After the adhesion between the product surface and the mold surface is reduced twice, the product is significantly reduced, thus preventing the product from being bulged out. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of the isometric structure of the mold provided for the anti-damage ejection device of the automotive parts injection mold of this utility model; Figure 2 An isometric structural schematic diagram of the anti-damage ejection device for automotive injection molds of this utility model; Figure 3 A front structural schematic diagram of the damage-resistant ejection device for automotive injection molds of this utility model; Figure 4 A partial structural schematic diagram of the anti-damage ejection device for automotive injection molds of this utility model; Figure 5 A schematic diagram of the three-plate ejector pin structure provided for the damage-resistant ejection device of automotive injection molds according to this utility model; Figure 6 A schematic diagram of the ejector plate structure provided for the damage-resistant ejection device of automotive injection molds according to this utility model; Figure 7 This is a schematic diagram of the ejector plate, ejector pin number three, and ejector pin number four provided for the anti-damage ejection device of automotive injection molds according to this utility model.

[0013] Figure 8 A schematic diagram of the bottom surface structure of the ejector plate provided for the anti-damage ejection device of automotive injection mold of this utility model.

[0014] In the diagram: 1. Ejector plate 1; 2. Ejector plate 2; 3. Ejector plate 3; 4. Male template; 5. Fixing plate; 6. Product surface; 7. Ejector pin 1; 8. Ejector pin 2; 9. Ejector pin 3; 10. Ejector pin 4; 11. Spring 2; 12. Groove; 13. Protrusion; 14. Limiting block; 15. Guide post; 16. Spring 1; 17. Telescopic rod 1; 18. Electromagnet 2; 19. Electromagnet 3; 20. Movable block. Detailed Implementation

[0015] 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.

[0016] Example: Please see Figure 1 - Figure 8 This embodiment of an anti-damage ejection device for automotive injection molds includes an ejector plate 1, an ejector plate 2, an ejector plate 3, a male mold plate 4, and a fixing plate 5. The ejector plates 1, 2, and 3 are all located between the male mold plate 4 and the fixing plate 5. The ejector plates 1, 2, and 3 are stacked and arranged sequentially along a direction perpendicular to the fixing plate 5. The male mold plate 4 is fixedly installed to the fixing plate 5. The upper surface of the male mold plate 4 has a product-shaped surface 6. A mold foot is installed on the surface of the fixing plate 5 near the male mold plate 4, and a support plate is installed on the surface of the male mold plate 4 near the fixing plate 5. The fixing plate 5 and the male mold plate 4 are connected by... The mold feet and support plates are fixedly connected. A guide post 15 is fixedly installed on the lower surface of the male mold plate 4. The guide post 15 passes through the ejector plate 1, ejector plate 2, and ejector plate 3. The guide post 15 can restrict the movement direction of the ejector plate 1, ejector plate 2, and ejector plate 3 to prevent misalignment and jamming of the plates. A first spring 16 is provided between the ejector plate 1 and the male mold plate 4. A guide post is fixedly connected to the upper surface of the ejector plate 1. The guide post passes through the male mold plate 4. The first spring 16 is sleeved on the outside of the guide post. The guide post is used to assist the first spring 16 to make the extension and contraction of the first spring 16 smooth. The first spring 16 can drive the ejector plate 1 to reset after the ejection action. A first ejector pin 7 is fixedly installed on the upper surface of the ejector plate 3, and a second ejector pin 8 is fixedly installed on the upper surface of the ejector plate 1. The product profile 6 is divided into multiple movable blocks 20. The ends of the first ejector pin 7 and the second ejector pin 8 away from the fixed plate 5 are fixedly connected to the surface of the movable block 20. The lower surface of the movable block 20 is in contact with the surface of the template 4. The movable block 20 corresponds to the weak area of ​​the product. The surface in contact with the product is the profile. The first ejector pin 7 and the second ejector pin 8 drive the weak area to form surface support, avoiding the bulging caused by point support.

[0017] Ejector plate 1 has a sliding connection between ejector pin 9 (number 3) and ejector pin 10 (number 4). Ejector plate 2 is used to abut ejector pin 9 (number 3) and ejector pin 10 (number 4). Ejector pin 9 (number 3) and ejector pin 10 (number 4) are connected to ejector plate 1 with spring 11 (number 2) between their ends and ejector plate 1. Ejector pin 10 (number 4) is used to directly push the thicker area of ​​the product, while ejector pin 9 (number 3) is used to support the weaker part. Before ejection, spring 11 (number 2) presses ejector pin 9 (number 3) and ejector pin 10 (number 4) together so that in the initial state, ejector pin 9 (number 3) and ejector pin 10 (number 4) fit against the product surface 6.

[0018] The surface of the ejector plate 1 near the ejector plate 2 has multiple grooves 12, and the surface of the ejector plate 2 near the ejector plate 1 has multiple protrusions 13 that fit the grooves 12. The third ejector pin 9 and the fourth ejector pin 10 pass through the ejector plate 1 through the grooves 12. The second spring 11 is located in the grooves 12, which provide installation space for the second spring 11. The second ejector pin 8 is sleeved on the outside of the third ejector pin 9, and the third ejector pin 9 passes through the second ejector pin 8. The ends of the third ejector pin 9 and the fourth ejector pin 10 near the product surface 6 are in contact with the product surface 6. The third ejector pin 9 is nested inside the second ejector pin 8. When the second ejector pin 8 drives the movable block 20 to move, it simultaneously forms auxiliary support for the weak points of the product and further disperses the force.

[0019] A limiting block 14 is fixedly installed on the surface of the ejector plate 3 near the ejector plate 1. The limiting block 14 is used to limit the distance between the ejector plate 1 and the ejector plate 2. The thickness of the ejector plate 2 and the protrusion 13 is equal to the height of the limiting block 14. A first telescopic rod 17, a second electromagnet 18 and a third electromagnet 19 are fixedly installed on the surface of the fixing plate 5 near the ejector plate 3. The telescopic end of the first telescopic rod 17 is fixedly connected to the ejector plate 3. The telescopic end of the second electromagnet 18 passes through the ejector plate 3 and abuts against the ejector plate 2. The telescopic end of the third electromagnet 19 abuts against the ejector plate 1.

[0020] Telescopic rod 17 can be a pneumatic telescopic rod, supplied by an external air source, and its extension and retraction are controlled by a solenoid valve. Electromagnets 18 and 19 are electromagnetic telescopic rods, connected to an external power source. Internally, they consist of electromagnets and permanent magnet guide rods. The upper end of the permanent magnet guide rod can be connected to a round bar. The length and precision of the telescopic end can be modified by machining the round bar, making it suitable for ejection devices. When electromagnets 18 and 19 are energized, the internal electromagnets attract the permanent magnet guide rod, causing the guide rod to move upwards. The telescopic rod extends. When the power is off, the guide rods of electromagnets 18 and 19 are in a non-powered state and are moved by external forces. As shown in the figure, when electromagnet 18 is de-energized, spring 16 presses down on the first pin plate 1, which moves downward and thus moves the telescopic end of electromagnet 18 downward. When electromagnet 19 is de-energized, spring 16 continues to press down on the first pin plate 1, which presses down on the second pin plate 2, which moves downward and causes the telescopic end of electromagnet 19 to retract.

[0021] The surface of a product with reinforcing ribs is often not the outer surface. Although dividing the mold surface may affect the inner surface of the product, it does not affect the overall structural performance of the product.

[0022] The illustrated surface is a schematic surface used to enlarge the product structure to which this ejection device is applicable. The schematic surface replaces the surface of the auto parts, does not affect the ejection function of the mold, and can better show the specific structure of the ejection device.

[0023] The working principle of the above embodiments is as follows: The ejector pins are divided into multiple groups, so that the product separates from the mold surface in a gradient manner, and finally the product is removed from the mold.

[0024] First, eject the entire product: During ejection, the other parts of the product are ejected directly by ejector pins (ejector pin 4, No. 10). At the weak points of the product, the product and the weak part of the mold surface, along with the reinforcing ribs, are ejected together. At this time, the other parts of the product are separated from the mold surface. Then, the product retracts in a gradient: the reinforcing ribs divide the weak parts of the product into multiple areas. First, the first ejector pin 7 drives part of the molded surface to retract once, and then the second ejector pin 8 drives the remaining molded surface to retract a second time. The first ejector pin 7 and the second ejector pin 8 are arranged alternately, so that the product is subjected to balanced force during the molded surface retraction process. During the secondary retraction of the molded surface, ejector pin 10 of the fourth type supports other parts of the product, ejector pin 9 of the third type is nested inside ejector pin 8 of the second type, and ejector pin 9 of the third type supports the weak parts of the product. During the overall ejection, most of the product surface is separated from the mold surface, and the adhesion between the product surface and the mold surface is reduced for the first time. When ejector pin 7 retracts, ejector pin 7 drives part of the mold surface to retract, reducing the adhesion between the product surface and the mold surface for the second time. When ejector pin 8 retracts, the product is supported by ejector pins 9 and 10. The adhesion between the product surface and the mold surface has been greatly reduced after the two reductions, so the product will not be bulged.

[0025] The specific operating mode of each component in the ejection device is as follows: Before ejection, ejector pins 9 and 10 are positioned close to ejector plate 2 under the elastic force of spring 11. At this time, the upper ends of ejector pins 9 and 10 are in contact with the product surface 6, and the lower ends of ejector pins 9 and 10 are flush with the lower surface of ejector plate 1. Since the combined thickness of ejector plate 2 and protrusion 13 is equal to the height of limit block 14, the surface of protrusion 13 near ejector plate 1 is in contact with the lower ends of ejector pins 9 and 10. The surface of ejector plate 2 near ejector plate 3 is in contact with ejector plate 3. Under the elastic force of spring 16, the lower surface of ejector plate 1 is in contact with the upper surface of limit block 14.

[0026] When ejection is required, an external air source supplies air to the first telescopic rod 17. The first telescopic rod 17 extends and pushes the ejector plate 3 to move towards the male template 4. The ejector plate 3 drives the ejector plate 2 and the ejector plate 1 to move together, thereby driving the first ejector 7, the second ejector 8, the third ejector 9 and the fourth ejector 10 to eject the product together. Since the first ejector 7 and the second ejector 8 are fixedly connected to the movable block 20, the movable block 20 is driven to eject the product. The movable block 20 corresponds to the weak point of the product. The contact surface between the movable block 20 and the product is a profile surface. The weak point of the product is supported by the profile surface. In other thicker areas of the product, the fourth ejector 10 directly ejects the product, thereby avoiding the phenomenon of bulging during one ejection process. After one ejection, an external power source supplies power to electromagnets 18 and 19, causing their telescopic ends to extend. Electromagnet 18's telescopic end contacts ejector plate 2, and electromagnet 19's telescopic end contacts ejector plate 3. Then, an external solenoid valve and an external air source control telescopic rod 17 to retract. Telescopic rod 17 drives ejector plate 3 to move downwards. Ejector plate 3, through ejector pin 7, drives the connected movable block 20 to move downwards, causing this movable block 20 to detach from the product surface 6. At this time, ejector plate 1 is supported by solenoid valve 3, and ejector plate 2 is supported by solenoid valve 2, thus preventing ejector pins 8, 9, and 10 from retracting, thereby completing one retraction. After the first retraction, the power to electromagnet 19 is cut off. The spring force of spring 16 is greater than that of multiple springs 11. Ejector plate 1 moves downward under the spring force of spring 16. Ejector plate 2 is supported by electromagnet 18. The protrusion of ejector plate 2 is inserted into the groove 12 of ejector plate 1. Ejector pin 9 and ejector pin 10 support the product. During the downward movement of ejector plate 1, the remaining movable block 20 is dislodged from the product surface by ejector pin 8, thus completing the second retraction.

[0027] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0028] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0029] 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 damage-resistant ejection device for automotive parts injection molds, characterized in that: It includes a first ejector plate (1), a second ejector plate (2), a third ejector plate (3), a male template (4), and a fixing plate (5). The first ejector plate (1), the second ejector plate (2), and the third ejector plate (3) are all located between the male template (4) and the fixing plate (5). The male template (4) is fixedly installed with the fixing plate (5). The upper surface of the male template (4) is provided with a product profile (6). A first ejector pin (7) is fixedly installed on the upper surface of the ejector plate (3), and a second ejector pin (8) is fixedly installed on the upper surface of the ejector plate (1). The product surface (6) is divided into multiple movable blocks (20). The first ejector pin (7) and the second ejector pin (8) are fixedly connected to the surface of the movable block (20) at the ends away from the fixed plate (5). The ejector plate (1) is slidably connected with ejector pins No. 3 (9) and No. 4 (10). The ejector plate (2) is used to abut against ejector pins No. 3 (9) and No. 4 (10). A spring No. 2 (11) is provided between ejector pin No. 3 (9) and ejector pin No. 4 (10) and ejector plate (1) near the end of ejector plate (2).

2. A damage-free ejection device for injection mold of automotive parts according to claim 1, characterized in that: The first ejector plate (1) has multiple grooves (12) on its surface near the second ejector plate (2). The second ejector plate (2) has multiple protrusions (13) that fit the grooves (12) on its surface near the first ejector plate (1). The third ejector (9) and the fourth ejector (10) pass through the first ejector plate (1) from the groove (12). The second spring (11) is located in the groove (12).

3. The damage-free ejection device for injection mold of automotive parts of claim 1, wherein: The second ejector pin (8) is sleeved on the outside of the third ejector pin (9), the third ejector pin (9) passes through the second ejector pin (8), and the third ejector pin (9) and the fourth ejector pin (10) are close to the product surface (6) and fit against the product surface (6).

4. The anti-damage ejection device for automotive injection molds according to claim 2, characterized in that: The three ejector plates (3) are fixedly mounted with a limiting block (14) near the surface of the first ejector plate (1). The combined thickness of the second ejector plate (2) and the protrusion (13) is equal to the height of the limiting block (14).

5. The damage-free automotive part injection mold ejection apparatus of claim 1, wherein: A guide post (15) is fixedly installed on the lower surface of the male template (4). The guide post (15) passes through the first ejector plate (1), the second ejector plate (2), and the third ejector plate (3). A spring (16) is provided between the first ejector plate (1) and the male template (4).

6. The damage-free automotive part injection mold ejection apparatus of claim 1, wherein: The fixing plate (5) is fixedly installed with a first telescopic rod (17), a second electromagnet (18) and a third electromagnet (19) near the surface of the ejector plate (3). The telescopic end of the first telescopic rod (17) is fixedly connected to the ejector plate (3). The telescopic end of the second electromagnet (18) passes through the ejector plate (3) and abuts against the ejector plate (2). The telescopic end of the third electromagnet (19) abuts against the ejector plate (1).

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