Top block springback prevention system of bumper injection mold

Abstract

The utility model discloses an ejection block springback prevention system of a bumper injection mold, which comprises a first connecting piece and a second connecting piece, and through the matching of the first connecting piece and the second connecting piece, the ejection block springback prevention system can utilize the second connecting piece to slide into a restraining groove of the first connecting piece when an ejection block is recovered, so as to limit the separation of the first connecting piece and the second connecting piece. According to the device, the rebounding phenomenon caused by natural rebounding force in the recovery process of the top block is effectively avoided, the problems of stress marks and poor appearance caused by rebounding of the top block on the surface of the bumper are remarkably reduced, the position precision and stability of the top block in the movement process are ensured, and compared with a traditional mode depending on grinding-in precision and guide sleeve matching, the production efficiency is improved. The position of the ejector block can be controlled more accurately, positioning errors caused by abrasion are reduced, and therefore the appearance quality and the size precision of bumper products are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the bumper manufacturing technical field, in particular to a bumper injection mold anti-ejector block rebound system. BACKGROUND

[0002] In the automobile manufacturing technical field, the manufacturing of automobile bumpers is one of the most important process links. As the appearance of the automobile, the bumper must have excellent appearance. In the manufacturing process of the bumper, the design and manufacturing of the injection mold play a key role, and the precise positioning of the large cap ejector block of the forming part is an important technical means to ensure the appearance quality of the bumper product.

[0003] In the conventional inner split bumper mold design, the positioning of the cap straight top is fixed on the ejector rod of the ejector plate, and the whole reciprocating motion is driven by the ejection system. When the mold is closed and reset, the three-way positioning surface at the bottom is used for positioning. However, this positioning method has obvious defects: the X-direction positioning ability of the top will decrease with the increase of the distance, resulting in natural rebound of the end part far away from the bottom. The rebound force acts on the surface of the bumper injection part, which will cause stress marks corresponding to the shape of the cap straight top boundary line, resulting in appearance defects. In addition, the conventional method relies on the precision of the research and development to control the gap, but in the long-term production process, the guide sleeve and the matching surface will produce natural wear gap. The larger the gap, the more serious the rebound of the ejector block under stress, thereby causing the aggravation of the ejector block printing defects.

[0004] The appearance quality of the automobile bumper is extremely high in precision, especially the precise positioning of the large cap ejector block of the forming part. However, in the conventional mold design, the positioning method of the cap ejector block has the problems of insufficient X-direction positioning ability, stress mark appearance defects, and wear gap leading to problem aggravation, which seriously affects the appearance quality of the bumper. CONTENT OF THE INVENTION

[0005] In view of the defects in the prior art, the application provides a bumper injection mold anti-ejector block rebound system to solve the problem of poor reliability of the existing bumper positioning mechanism.

[0006] The above-mentioned purpose of the application is mainly realized by the following technical scheme:

[0007] A bumper injection mold anti-ejector block rebound system, the anti-ejector block rebound system comprises:

[0008] A first connecting piece is fixedly connected on one side of the side wall of the movable mold core close to the ejector block, and a restraint groove is arranged on the first connecting piece;

[0009] Second connecting piece, for fixedly connecting on the side wall of the movable mold core close to the top block, the second connecting piece moves synchronously with the top block, and when the top block is recycled, the second connecting piece can slide into the constraint groove to limit the separation of the first connecting piece and the second connecting piece.

[0010] In an optional embodiment, the first connecting piece and the second connecting piece are respectively arranged longitudinally.

[0011] In an optional embodiment, the side wall of the movable mold core and the top block is respectively provided with a containing groove, so that when the side wall of the movable mold core and the top block is fitted, the second connecting piece is clamped on the first connecting piece.

[0012] In an optional embodiment, the constraint groove penetrates the first connecting piece longitudinally.

[0013] In an optional embodiment, the first connecting piece is provided with one constraint groove on each side, and the second connecting piece includes two connecting plates matched with the constraint grooves.

[0014] In an optional embodiment, the first connecting piece is T-shaped, and the two connecting plates are arranged on the top block at intervals.

[0015] In an optional embodiment, the first connecting piece and the second connecting piece are respectively provided with two groups.

[0016] In an optional embodiment, the two groups of first connecting pieces are arranged at intervals, and the two groups of second connecting pieces are arranged at intervals.

[0017] In an optional embodiment, the first connecting piece and the second connecting piece are respectively detachably fixed by bolts.

[0018] In an optional embodiment, the first connecting piece is made of copper beryllium alloy, and the second connecting piece is made of DC53 die steel.

[0019] Compared with the prior art, the application has the following advantages:

[0020] The anti-top block rebound system in the application is applied to a bumper injection mold, and the anti-top block rebound system includes a first connecting piece and a second connecting piece. One side of the first connecting piece is used for fixedly connecting on the side wall of the movable mold core close to the top block, and the first connecting piece is provided with a constraint groove. The second connecting piece is used for fixedly connecting on the side wall of the top block close to the movable mold core. The second connecting piece moves synchronously with the top block, and when the top block is recycled, the second connecting piece can slide into the constraint groove to limit the separation of the first connecting piece and the second connecting piece.

[0021] By the cooperation of the first connecting piece and the second connecting piece, the anti-bumper block rebound system can limit the separation of the two by sliding the second connecting piece into the constraint groove of the first connecting piece when the bumper block is being recycled. This effectively avoids the rebound phenomenon of the bumper block during the recycling process due to natural rebound force, significantly reducing the stress marks and appearance problems on the bumper surface caused by bumper block rebound. The anti-bumper block rebound system ensures the position accuracy and stability of the bumper block during movement through mechanical structure constraints. Compared with the traditional method of relying on precision and guide sleeve cooperation, it can more accurately control the position of the bumper block, reduce positioning errors caused by wear, and thus improve the appearance quality and dimensional accuracy of the bumper product.

[0022] In a conventional mold design, the guide sleeve and the mating surface will naturally wear during long-term use, causing the bumper block to rebound more severely under stress. The anti-bumper block rebound system reduces direct contact and friction between the bumper block and other components of the mold through the cooperation of the constraint groove and the connecting piece, thereby reducing the impact of wear on the positioning and movement of the bumper block and extending the service life of the mold. No complex hydraulic or pneumatic devices are needed to achieve the positioning and anti-rebound function of the bumper block. This not only reduces the manufacturing cost of the mold, but also simplifies the maintenance and maintenance process of the mold.

[0023] The anti-bumper block rebound system is suitable for bumper injection molds of different sizes and shapes, and has good universality and adaptability. It can effectively improve the production quality and efficiency of bumpers whether in mass production or small-batch customized production. It improves the appearance quality and dimensional accuracy of the bumper product, reduces mold wear and maintenance costs, and has significant technical advantages and application value. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A partial cross-sectional view of the anti-bumper block rebound system provided in the embodiments of the present application is provided.

[0026] Figure 2 A mounting schematic diagram of the first connecting piece provided in the embodiments of the present application is provided.

[0027] Figure 3 A partial schematic diagram of the first connecting piece provided in the embodiments of the present application is provided.

[0028] Figure 4 A mounting schematic diagram of the second connecting piece provided in the embodiments of the present application is provided.

[0029] In the figure: 100, the first connecting piece; 101, the constraint groove; 200, the second connecting piece; 201, the connecting plate; 301, the movable mold core; 302, the top block; 303, the accommodating groove. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and specific embodiments. It needs to be explained here that the description of these embodiment modes is used to help understand the utility model, but does not constitute the limitation of the utility model. The specific structure and functional details disclosed in the present text are only used to describe the example embodiment of the utility model. However, the utility model can be embodied in many alternative forms, and should not be understood as being limited in the embodiments set forth in the present text.

[0031] As Figure 1 shown, Figure 1 the partial sectional view of the anti-top-block 302 rebound system provided for the embodiment of the present application, an anti-top-block 302 rebound system of bumper injection mold, the anti-top-block 302 rebound system includes the first connecting piece 100 and the second connecting piece 200, wherein:

[0032] One side of the first connecting piece 100 is used to be fixedly connected on the side wall of the movable mold core 301 close to the top block 302, and the first connecting piece 100 is provided with the constraint groove 101.

[0033] As Figure 2 and Figure 3 shown, Figure 2 the installation schematic view of the first connecting piece 100 provided for the embodiment of the present application; Figure 3 the partial schematic view of the first connecting piece 100 provided for the embodiment of the present application, one side of the first connecting piece 100 is fixedly connected on the side wall of the movable mold core 301 close to the top block 302 through high-precision machining. It is ensured that the first connecting piece 100 remains stable during the entire working process of the mold and will not be displaced due to external force. More importantly, the first connecting piece 100 is provided with a constraint groove 101. The shape and size of this constraint groove 101 are accurately calculated to ensure perfect cooperation with the second connecting piece 200, thereby playing a key limiting role when the top block 302 is recovered.

[0034] As Figure 1 and Figure 4 shown, Figure 4This is an installation diagram of the second connector 200 provided in the embodiment of this application. The second connector 200 is used to be fixedly connected to the side wall of the top block 302 near the moving model core 301. The second connector 200 moves up and down synchronously with the top block 302. When the top block 302 is retracted, the second connector 200 can slide into the constraint groove 101 to restrict the separation of the first connector 100 and the second connector 200.

[0035] The second connecting piece 200, after precision machining, is fixedly connected to the side wall of the top block 302 near the moving mold core 301, forming an integral unit with the top block 302. During mold operation, the second connecting piece 200 and the top block 302 move up and down synchronously, ensuring that their movements remain consistent. When the top block 302 begins to retract, the second connecting piece 200 slides along a preset trajectory into the constraint groove 101 on the first connecting piece 100. At this time, the constraint groove 101 effectively restricts the separation between the first connecting piece 100 and the second connecting piece 200, thereby preventing adverse effects from the top block 302 during retraction due to natural rebound force.

[0036] It not only solves the problem of stress marks and poor appearance on the bumper surface caused by the springback of the top block 302 in traditional molds, but also improves the stability and service life of the mold through the optimization of the mechanical structure.

[0037] like Figure 1 As shown, in an optional embodiment, the anti-rebound system of the top block 302 in this application is applied to a bumper injection mold. The working principle of the anti-rebound system of the top block 302 is as follows: The anti-rebound system of the top block 302 includes a first connector 100 and a second connector 200. One side of the first connector 100 is fixedly connected to the side wall of the moving mold core 301 near the top block 302. The first connector 100 is provided with a constraint groove 101. The second connector 200 is fixedly connected to the side wall of the top block 302 near the moving mold core 301. The second connector 200 moves up and down synchronously with the top block 302. When the top block 302 is retracted, the second connector 200 can slide into the constraint groove 101 to restrict the separation of the first connector 100 and the second connector 200.

[0038] By the cooperation of the first connecting piece 100 and the second connecting piece 200, the anti-bounce system of the top block 302 can slide into the constraint groove 101 of the first connecting piece 100 when the top block 302 is recovered, thereby limiting the separation of the two. The phenomenon of bounce of the top block 302 during the recovery process due to natural rebound force is effectively avoided, and the stress marks and appearance problems on the bumper surface caused by the bounce of the top block 302 are significantly reduced. The anti-bounce system of the top block 302 ensures the position accuracy and stability of the top block 302 during movement through the constraint of the mechanical structure. Compared with the traditional method of relying on the accuracy of research and the cooperation of the guide sleeve, the position of the top block 302 can be more accurately controlled, the positioning error caused by wear is reduced, and the appearance quality and dimensional accuracy of the bumper product are improved.

[0039] In a conventional mold design, the guide sleeve and the cooperating surface will naturally wear during long-term use, causing the top block 302 to bounce under stress. The anti-bounce system of the top block 302 reduces the direct contact and friction between the top block 302 and other parts of the mold through the cooperation of the constraint groove 101 and the connecting piece, thereby reducing the impact of wear on the positioning and movement of the top block 302, and prolonging the service life of the mold. No complex hydraulic or pneumatic devices are needed to achieve the positioning and anti-bounce function of the top block 302. This not only reduces the manufacturing cost of the mold, but also simplifies the maintenance and maintenance process of the mold.

[0040] It is suitable for bumper injection molds of different sizes and shapes, and has good universality and adaptability. Whether in mass production or small-batch customized production, it can effectively improve the production quality and efficiency of bumpers. The appearance quality and dimensional accuracy of the bumper product are improved, the mold wear and maintenance cost are reduced, and it has significant technical advantages and application value.

[0041] As shown in Figure 2 , Figure 4 In an optional embodiment, the first connecting piece 100 and the second connecting piece 200 are arranged longitudinally respectively. This longitudinal layout not only makes the entire system structure more compact, but also better adapts to the space limitations inside the mold, while also helping to improve the stability and reliability of the system.

[0042] As shown in Figure 1 , Figure 3 In an optional embodiment, the movable mold core 301 and the side wall of the top block 302 are respectively provided with accommodating grooves 303, so that when the movable mold core 301 and the side wall of the top block 302 are fitted, the second connecting piece 200 is clamped on the first connecting piece 100.

[0043] When the dynamic model core 301 is fitted with the side wall of the top block 302, the second connecting piece 200 can be accurately clamped on the first connecting piece 100. Through the arrangement of the accommodating groove 303, the matching precision between the first connecting piece 100 and the second connecting piece 200 is further enhanced, ensuring that the second connecting piece 200 can accurately slide into the constraint groove 101 during the recycling of the top block 302, thereby effectively limiting the rebound of the top block 302.

[0044] As shown in Figure 1 , Figure 3 indicated, in an optional embodiment, the constraint groove 101 extends through the first connecting piece 100 in the longitudinal direction. The length direction of the constraint groove 101 is consistent with the longitudinal direction of the first connecting piece 100, thereby providing sufficient sliding space for the second connecting piece 200, ensuring that it can smoothly slide into the constraint groove 101 during the recycling of the top block 302, and effectively constrain the top block 302.

[0045] As shown in Figure 2 , Figure 3 indicated, in an optional embodiment, the first connecting piece 100 is provided with one constraint groove 101 on each side, and the second connecting piece 200 includes two connecting plates 201 respectively matched with the constraint grooves 101. The arrangement of double constraint grooves 101 and double connecting plates 201 further improves the stability and reliability of the system. Through the cooperation of the two connecting plates 201 with the two constraint grooves 101, the force generated during the recycling of the top block 302 can be more evenly distributed, thereby more effectively preventing the rebound of the top block 302.

[0046] As shown in Figure 2 , Figure 3 indicated, in an optional embodiment, the first connecting piece 100 is T-shaped, and the two connecting plates 201 are spaced apart on the top block 302.

[0047] The T-shaped first connecting piece 100 structure not only has good mechanical strength, but also can better adapt to the shape and size of the top block 302. The two spaced apart connecting plates 201 can further improve the matching precision between the second connecting piece 200 and the first connecting piece 100, ensuring the stable operation of the system.

[0048] As shown in Figure 1 , Figure 2 indicated, in an optional embodiment, the first connecting piece 100 and the second connecting piece 200 are respectively provided with two groups. By arranging two groups of first connecting pieces 100 and second connecting pieces 200, the overall stability of the system can be further enhanced. The two groups of connecting pieces constrain the top block 302 from different positions, thereby more effectively preventing the rebound of the top block 302 and improving the appearance quality and dimensional accuracy of the bumper product.

[0049] In optional embodiments, the two groups of first connecting members 100 are arranged in a spaced manner, and the two groups of second connecting members 200 are arranged in a spaced manner.

[0050] Such a spaced arrangement can make the spatial distribution of the two groups of connecting members in the mold more reasonable, avoid mutual interference, and also help improve the overall stability and reliability of the system.

[0051] As shown in the optional embodiments, the first connecting members 100 and the second connecting members 200 are respectively detachably fixed by bolts. Figure 1

[0052] The detachable fixing manner not only facilitates the assembly and disassembly of the mold, but also enables quick operation when the connecting members need to be maintained or replaced, thereby improving the maintenance efficiency of the mold.

[0053] In optional embodiments, the first connecting members 100 are made of copper beryllium alloy, and the second connecting members 200 are made of DC53 mold steel.

[0054] Copper beryllium alloy has high strength, high hardness, and good wear resistance, and can effectively withstand various forces generated by the top block 302 during the injection molding process, while also ensuring the long-term stable operation of the connecting members. DC53 mold steel has excellent wear resistance and toughness, which can ensure that the second connecting members 200 will not be affected in function due to wear during cooperation with the first connecting members 100.

[0055] It should be understood that the terms first, second, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Although the terms first, second, etc. can be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit can be referred to as the second unit, and similarly the second unit can be referred to as the first unit, without departing from the scope of the example embodiments of the present application.

[0056] It should be understood that the term "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, B alone, and A and B together. The term "and" herein describes another association relationship of the associated objects, which means that there can be two relationships, for example, A and B, which means that there are two cases of A alone and A and B together. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0057] ​It should be understood that, in the description of the present application, the orientation or positional relationship indicated by the terms "upper", "vertical", "inner", "outer" and the like is the orientation or positional relationship when the disclosed product is usually placed, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0058] It should be understood that, in the description of the present application, the orientation or positional relationship indicated by the terms "upper", "vertical", "inner", "outer" and the like is the orientation or positional relationship when the disclosed product is usually placed, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0059] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including" when used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0060] In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, those skilled in the art will understand that example embodiments can be practiced without these specific details. In other instances, well-known processes, structures and techniques have not been shown in detail in order to avoid obscuring the example embodiments.

[0061] The above description is merely that of specific embodiments of the application to put those skilled in the art in a position to get a grasp of the present application. Various modifications to these embodiments will be apparent to, and can be implemented by, those skilled in the art without departing from the spirit and scope of the present application. Thus, the present application shall not be limited to the embodiments shown herein but rather the scope of the present application is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures.

[0062] It should be noted that the information disclosed in the above BACKGROUND section is only for the purpose of strengthening the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art.

Claims

1. A knock-out block springback system for a bumper injection mold, characterized by, The anti-ejection system comprises: A first connecting piece is fixedly connected to the side wall of the movable mold core near the ejector block, and a constraint groove is arranged on the first connecting piece; A second connecting piece is fixedly connected to the side wall of the ejector block near the movable mold core, and the second connecting piece moves synchronously with the ejector block and can slide into the constraint groove to prevent the first connecting piece from separating from the second connecting piece when the ejector block is retracted.

2. The bumper injection mold anti-ejector springback system of claim 1, wherein: The first connecting piece and the second connecting piece are arranged longitudinally.

3. The bumper injection mold anti-ejector springback system of claim 1, wherein: The side walls of the movable mold core and the ejector block are respectively provided with accommodating grooves, so that when the side walls of the movable mold core and the ejector block are fitted, the second connecting piece is clamped on the first connecting piece.

4. The bumper injection mold anti-ejector springback system of claim 1, wherein: The constraint groove penetrates the first connecting piece longitudinally.

5. The bumper injection mold anti-ejector springback system of claim 1, wherein: The first connecting piece is provided with one constraint groove on each side, and the second connecting piece comprises two connecting plates matched with the constraint grooves.

6. The bumper injection mold anti-ejector spring system of claim 5, wherein: The first connecting piece is T-shaped, and the two connecting plates are arranged on the ejector block in a spaced manner.

7. The bumper injection mold anti-ejector spring system of claim 1 wherein: The first connecting piece and the second connecting piece are respectively provided with two groups.

8. The bumper injection mold anti-ejector spring system of claim 7, wherein: The two groups of first connecting pieces are arranged in a spaced manner, and the two groups of second connecting pieces are arranged in a spaced manner.

9. The bumper injection mold anti-ejector spring system of claim 1 wherein: The first connecting piece and the second connecting piece are detachably fixed by bolts.

10. The bumper injection mold anti-ejector spring system of claim 1, wherein: The first connecting piece is made of copper beryllium alloy, and the second connecting piece is made of DC53 die steel.

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