Large automobile bumper injection mold with straight top and inclined top demolding mechanism

Abstract

The utility model provides a large automobile bumper injection mold with a straight ejection and inclined ejection demolding mechanism, and belongs to the technical field of molds. The mold comprises a lower mold plate, the lower mold plate is provided with a forming cavity composed of a movable middle ejector block structure and two pitched roof insert structures, the two pitched roof insert structures are symmetrically arranged along the center line of the movable middle ejector block structure and arranged on the lower side of the movable middle ejector block structure, and an ejector plate is arranged on the lower side of the lower mold plate. An automobile bumper product can be formed in an injection molding mode through a forming cavity composed of the movable middle ejector block structure and the two inclined ejector insert structures, after the product is formed in an injection molding mode, the ejector plate moves upwards, upward thrust can be applied to the product through the movable middle ejector block structure, and therefore parting lines can be prevented from being formed on the inner surface of the product.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a large-scale injection mold for an automobile bumper with a direct ejection and inclined ejection demolding mechanism. Background Art

[0002] Plastic automobile bumpers are generally injection molded. After injection molding of the existing automobile bumpers, multi-insert ejection is mostly used, but this will form a dividing line on the inner surface of the bumper, which will affect the inner surface quality of the bumper.

[0003] For example, a Chinese patent discloses an automobile bumper mold [Application No.: 201621240873.0], which includes a mold body. An opening mechanism is provided at the position where an opening needs to be made on the bumper on the mold body. The opening mechanism includes a cylindrical receiving hole provided on the mold body. An opening column for opening the hole is provided in the receiving hole. A locking mechanism for locking the opening column and completely receiving it in the receiving hole is provided between the opening column and the receiving hole. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and provide a large-scale injection mold for an automobile bumper with a direct ejection and inclined ejection demolding mechanism.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A large-scale injection mold for an automobile bumper with a direct ejection and inclined ejection demolding mechanism includes a lower template. A molding cavity composed of a mobile intermediate ejector block structure and two inclined ejector insert structures is provided on the lower template. The two inclined ejector insert structures are symmetrically arranged along the center line of the mobile intermediate ejector block structure and are arranged on the lower side of the mobile intermediate ejector block structure. A top plate is provided on the lower side of the lower template. The top plate is connected to the mobile intermediate ejector block structure and the inclined ejector insert structures. The inclined ejector insert structure includes a side inclined ejector block. The side inclined ejector block is connected to the top plate through a plurality of side inclined ejector rods. A sliding side extraction assembly is further provided on the side inclined ejector block.

[0007] In the above large-scale injection mold for an automobile bumper with a direct ejection and inclined ejection demolding mechanism, the sliding side extraction assembly includes two moving inserts arranged in a V shape on the side inclined ejector block. The outer end surfaces of the moving inserts are flush with the outer surface of the side inclined ejector block and are slidably matched with the side inclined ejector block. The moving inserts are connected to the lower template through a sliding guiding structure.

[0008] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, the sliding guiding structure includes a guiding seat fixed on the lower template. The guiding seat is provided with guiding blocks having an inner moving section and an outer moving section. A horizontal connecting rod is fixedly connected to the moving insert block. The horizontal connecting rod and the moving insert block are slidably matched. The inner moving section is located below the outer moving section. When the outer end face of the moving insert block is flush with the outer surface of the side inclined top block, the connection part of the horizontal connecting rod and the guiding seat is located below the inner moving section.

[0009] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, the mobile intermediate top block structure includes an intermediate top block arranged on the top of the lower template. The intermediate top block is connected to the top plate through a plurality of first direct ejector rods.

[0010] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, a direct and inclined top ejecting assembly is further provided on the intermediate top block.

[0011] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, the direct and inclined top ejecting assembly includes a plurality of intermediate inclined top blocks arranged in the intermediate top block and a plurality of direct top blocks. The intermediate inclined top blocks are hinged to the top plate through intermediate inclined ejector rods. The direct top blocks are fixedly connected to the top plate through second direct ejector rods.

[0012] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, an inclined guiding structure is further provided between the lower template and the side inclined top block.

[0013] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, the inclined guiding structure includes an inclined guiding plate fixed on the lower template through a plurality of screws. The inclined guiding plate is inserted into an inclined guiding groove on the side of the side inclined top block.

[0014] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, two first side core-pulling assemblies and four second side core-pulling assemblies are further provided on the side of the lower template. The first side core-pulling assemblies and the second side core-pulling assemblies are located on the same side of the lower template. The first side core-pulling assemblies are located below the second side core-pulling assemblies.

[0015] In the above-mentioned large-scale automobile bumper injection mold with a direct top plus inclined top demolding mechanism, the first side core-pulling assembly includes a tunnel insert block slidably inserted into the lower template. The tunnel insert block horizontally penetrates the lower template and its inner end is inserted into the molding cavity. A translation driver connected to the tunnel insert block is further provided on the lower template;

[0016] The described second side core-pulling assembly includes a side insert block slidably arranged on the top of the lower template and a driving rod obliquely inserted into the side insert block, and the top end of the driving rod is fixed on the upper template.

[0017] Compared with the existing technology, the advantages of the present utility model are as follows:

[0018] 1. The molding cavity composed of the mobile intermediate ejector block structure and the two inclined ejector insert block structures can injection mold automotive bumper products. After the product is injection molded, when the top plate moves upward, it can apply an upward thrust to the product through the mobile intermediate ejector block structure, thereby avoiding the formation of parting lines on the inner surface of the product. When the top plate moves upward, it can also drive the side inclined ejector blocks to move obliquely upward through several side inclined ejector rods, so that the side inclined ejector blocks can move toward the center direction of the lower template during the movement, causing the vertical parting surface on the side inclined ejector blocks to separate from the product. When the side inclined ejector blocks move obliquely upward, the sliding side core-pulling assembly can also automatically core-pull, enabling the undercut positions on the side of the product to be smoothly demolded.

[0019] 2. When the side inclined ejector blocks move obliquely upward, the horizontal connecting rod can first move from bottom to top in the inner moving section of the guiding block, thereby driving the moving insert block to translate toward the center direction of the lower template, enabling the undercuts formed on the side of the product by the moving insert block to separate from the moving insert block. After the moving insert block and the undercuts are separated, when the side inclined ejector blocks continue to move upward, the horizontal connecting rod can drive the moving insert block to translate outward and reset when moving on the outer moving section.

[0020] Other advantages, objectives, and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the lower template;

[0022] Figure 2 is the partial structural schematic diagram of the lower template;

[0023] Figure 3 is the structural schematic diagram of the inclined ejector insert block structure;

[0024] Figure 4 is the structural schematic diagram of the sliding side core-pulling assembly.

[0025] In the figures, lower template 1, mobile intermediate ejector block structure 2, inclined ejector insert block structure 3, top plate 4, side inclined ejector block 5, side inclined ejector rod 6, sliding side core-pulling assembly 7, moving insert block 8, guiding seat 9, inner moving section 10, outer moving section 11, guiding block 12, horizontal connecting rod 13, intermediate ejector block 14, first straight ejector rod 15, intermediate inclined ejector block 16, straight ejector block 17, inclined guiding plate 18, tunnel insert block 19, side insert block 20, driving rod 21. Detailed Embodiment

[0026] As shown Figures 1-4 , a large automobile bumper injection mold with a direct-top plus inclined-top demolding mechanism includes a lower template 1. A molding cavity composed of a movable intermediate ejector block structure 2 and two inclined ejector insert structures 3 is arranged on the lower template 1. The two inclined ejector insert structures 3 are symmetrically arranged along the center line of the movable intermediate ejector block structure 2 and are arranged on the lower side of the movable intermediate ejector block structure 2. A top plate 4 is arranged on the lower side of the lower template 1. The top plate 4 is connected to the movable intermediate ejector block structure 2 and the inclined ejector insert structures 3. The inclined ejector insert structure 3 includes a side inclined ejector block 5. The side inclined ejector block 5 is connected to the top plate 4 through a plurality of side inclined ejector rods 6. A sliding side core-pulling assembly 7 is further arranged on the side inclined ejector block 5.

[0027] In the present utility model, the molding cavity composed of the movable intermediate ejector block structure 2 and the two inclined ejector insert structures 3 can injection-mold an automobile bumper product. After the product is injection-molded, when the top plate moves upward, it can apply an upward thrust to the product through the movable intermediate ejector block structure 2, thereby avoiding the formation of a parting line on the inner surface of the product.

[0028] Secondly, when the top plate moves upward, it can also drive the side inclined ejector block to move obliquely upward through a plurality of side inclined ejector rods 6, so that the side inclined ejector block can move toward the center direction of the lower template during the movement, and the vertical parting surface on the side inclined ejector block is separated from the product. When the side inclined ejector block 5 moves obliquely upward, the sliding side core-pulling assembly can also automatically core-pull, so that the undercut position on the side of the product is smoothly demolded.

[0029] Specifically, the sliding side core-pulling assembly 7 includes two moving inserts 8 arranged in a V shape on the side inclined ejector block 5. The outer end surface of the moving insert 8 is flush with the outer surface of the side inclined ejector block 5 and is slidably matched with the side inclined ejector block 5. The moving insert 8 is connected to the lower template 1 through a sliding guiding structure. The sliding guiding structure includes a guiding seat 9 fixed on the lower template 1. The guiding seat 9 has a guiding block 12 with an inner moving section 10 and an outer moving section 11. A horizontal connecting rod 13 is fixedly connected to the moving insert 8. The horizontal connecting rod 13 is slidably matched with the moving insert 8. The inner moving section 10 is located below the outer moving section 11. When the outer end surface of the moving insert 8 is flush with the outer surface of the side inclined ejector block 5, the connection position between the horizontal connecting rod 13 and the guiding seat 9 is located below the inner moving section 10. When the side inclined ejector block moves obliquely upward, the horizontal connecting rod 13 can first move from bottom to top in the inner moving section of the guiding block 12, thereby driving the moving insert 8 to translate toward the center direction of the lower template, so that the undercut formed on the side of the product by the moving insert 8 can be separated from the moving insert. After the moving insert and the undercut are separated, the side inclined ejector block continues to move upward. When the horizontal connecting rod 13 moves on the outer moving section 11, it can drive the moving insert to translate outward and reset.

[0030] Specifically, the mobile intermediate ejector block structure 2 includes an intermediate ejector block 14 disposed on the top of the lower template 1, and the intermediate ejector block 14 is connected to the top plate 4 through a plurality of first straight ejector rods 15. When the product is ejected, the upward movement of the top plate can drive the intermediate ejector block to move upward through a plurality of first straight ejector rods to eject the product. The intermediate ejector block is arranged in a large area and basically covers the middle position of the product, so there will be no parting line during ejection.

[0031] Preferably, a straight and inclined ejector assembly is further provided on the intermediate ejector block 14. The straight and inclined ejector assembly includes a plurality of intermediate inclined ejector blocks 16 disposed in the intermediate ejector block 14 and a plurality of straight ejector blocks 17. The intermediate inclined ejector blocks 16 are hinged to the top plate 4 through intermediate inclined ejector rods, and the straight ejector blocks 17 are fixedly connected to the top plate 4 through second straight ejector rods. When the top plate moves upward, it can also drive the intermediate inclined ejector blocks 16 and the straight ejector blocks 17 to move synchronously through the intermediate inclined ejector rods and the second straight ejector rods to apply a thrust force to the product.

[0032] Preferably, an inclined guiding structure is further provided between the lower template 1 and the side inclined ejector block 5. The inclined guiding structure includes an inclined guiding plate 18 fixed to the lower template 1 through a plurality of screws, and the inclined guiding plate 18 is inserted into an inclined guiding groove on the side of the side inclined ejector block 5. The inclined guiding plate cooperating with the inclined guiding groove can limit the side inclined ejector block.

[0033] Specifically, two first side core-pulling assemblies and four second side core-pulling assemblies are further provided on the side of the lower template 1. The first side core-pulling assemblies and the second side core-pulling assemblies are located on the same side of the lower template 1, and the first side core-pulling assemblies are located below the second side core-pulling assemblies. After the product is injection-molded, the first side core-pulling assemblies can automatically perform core-pulling. When the mold is opened, the second side core-pulling assemblies can automatically perform core-pulling when the upper template moves upward.

[0034] Specifically, the first side core-pulling assembly includes a tunnel insert 19 slidably inserted into the lower template 1. The tunnel insert 19 horizontally penetrates the lower template 1 and its inner end is inserted into the molding cavity. A translation drive connected to the tunnel insert 19 is further provided on the lower template 1; the translation drive can drive the tunnel insert to move horizontally outward so as to realize the automatic core-pulling of the tunnel insert.

[0035] Those skilled in the art should understand that the translation drive can be an oil cylinder, a cylinder or a linear motor, etc.

[0036] Specifically, the second side core-pulling assembly includes a side insert 20 slidably disposed on the top of the lower template 1 and a driving rod 21 obliquely inserted into the side insert 20. The top end of the driving rod 21 is fixed to the upper template. When the upper template moves upward, it can drive the driving rod to move upward, and the upward movement of the driving rod can drive the side insert to translate away from the molding cavity to realize the automatic core-pulling of the side insert.

[0037] The working principle of the present utility model is as follows: The molding cavity composed of the mobile intermediate ejector block structure 2 and two inclined ejector insert structures 3 can injection-mold automotive bumper products. After the product is injection-molded, when the top plate moves upward, it can apply an upward thrust to the product through the mobile intermediate ejector block structure 2, thereby avoiding the formation of parting lines on the inner surface of the product. When the top plate moves upward, it can also drive the side inclined ejector rods 6 to drive the side inclined ejector blocks to move obliquely upward, so that the side inclined ejector blocks can move toward the center of the lower template during the movement, causing the vertical parting surfaces on the side inclined ejector blocks to separate from the product. When the side inclined ejector blocks 5 move obliquely upward, the sliding side core-pulling assembly can also automatically core-pull, enabling the undercut positions on the side of the product to be smoothly demolded;

[0038] When the side inclined ejector blocks move obliquely upward, the horizontal connecting rod 13 can first move from bottom to top in the inner moving section of the guide block 12, thereby driving the moving insert 8 to translate toward the center of the lower template, enabling the undercuts formed on the side of the product by the moving insert 8 to separate from the moving insert. After the moving insert and the undercuts are separated, the side inclined ejector blocks continue to move upward. When the horizontal connecting rod 13 moves on the outer moving section 11, it can drive the moving insert to translate outward and reset. When the product is ejected, the top plate moving upward can drive the intermediate ejector block to move upward through several first straight ejector rods to eject the product. The intermediate ejector block is arranged in a large area, basically covering the middle position of the product, so no parting lines will be generated during ejection. When the top plate moves upward, it can also drive the intermediate inclined ejector block 16 and the straight ejector block 17 to move synchronously through the intermediate inclined ejector rod and the second straight ejector rod to apply a thrust to the product. The inclined guide plate cooperating with the inclined guide groove can limit the side inclined ejector blocks;

[0039] After the product is injection-molded, the first side core-pulling assembly can automatically core-pull. When the mold is opened, when the upper template moves upward, the second side core-pulling assembly can automatically core-pull. The translation driver can drive the tunnel insert to move horizontally outward, thereby realizing the automatic core-pulling of the tunnel insert. When the upper template moves upward, it can drive the driving rod to move upward, and the driving rod moving upward can drive the side insert to translate away from the molding cavity to realize the automatic core-pulling of the side insert.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0041] Although the following terms such as template 1, mobile intermediate top block structure 2, inclined top insert structure 3, top plate 4, side inclined top block 5, side inclined top rod 6, sliding side core-pulling assembly 7, moving insert 8, guide seat 9, inner moving section 10, outer moving section 11, guide block 12, horizontal connecting rod 13, intermediate top block 14, No. 1 direct top rod 15, intermediate inclined top block 16, direct top block 17, inclined guide plate 18, tunnel insert 19, side insert 20, driving rod 21 etc. are used more frequently in this text, using these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any kind of additional limitation is contrary to the spirit of the present utility model.

Claims

1. A large automotive bumper injection mold with a direct top and inclined top demolding mechanism, comprising a lower template (1), characterized in that, A forming cavity composed of a mobile intermediate ejector block structure (2) and two inclined ejector insert structures (3) is provided on the lower template (1) described above. The two inclined ejector insert structures (3) are symmetrically arranged along the center line of the mobile intermediate ejector block structure (2) and are arranged on the lower side of the mobile intermediate ejector block structure (2). A top plate (4) is provided on the lower side of the lower template (1). The top plate (4) is connected to the mobile intermediate ejector block structure (2) and the inclined ejector insert structure (3). The inclined ejector insert structure (3) includes a side inclined ejector block (5). The side inclined ejector block (5) is connected to the top plate (4) through a plurality of side inclined ejector rods (6). A sliding side core-pulling assembly (7) is further provided on the side inclined ejector block (5).

2. The large automobile bumper injection mold with a direct top and inclined top demolding mechanism according to claim 1, characterized in that, The sliding side core-pulling assembly (7) includes two moving inserts (8) arranged in a V shape on the side inclined ejector block (5). The outer end surface of the moving insert (8) is flush with the outer surface of the side inclined ejector block (5) and is in sliding fit with the side inclined ejector block (5). The moving insert (8) is connected to the lower template (1) through a sliding guiding structure.

3. The large automotive bumper injection mold with a direct-top and inclined-top demolding mechanism according to claim 2, wherein, The sliding guiding structure includes a guiding seat (9) fixed on the lower template (1). The guiding seat (9) has a guiding block (12) with an inner moving section (10) and an outer moving section (11). A horizontal connecting rod (13) is fixedly connected to the moving insert (8). The horizontal connecting rod (13) is in sliding fit with the moving insert (8). The inner moving section (10) is located below the outer moving section (11). When the outer end surface of the moving insert (8) is flush with the outer surface of the side inclined ejector block (5), the connection part of the horizontal connecting rod (13) and the guiding seat (9) is located below the inner moving section (10).

4. The large automotive bumper injection mold with a direct-top and inclined-top demolding mechanism according to claim 1, characterized in that, The mobile intermediate ejector block structure (2) includes an intermediate ejector block (14) arranged on the top of the lower template (1). The intermediate ejector block (14) is connected to the top plate (4) through a plurality of first straight ejector rods (15).

5. The large automotive bumper injection mold with a direct-top and inclined-top demolding mechanism according to claim 4, characterized in that, A straight inclined ejector block ejection assembly is further provided on the intermediate ejector block (14).

6. The large automotive bumper injection mold with a direct top and inclined top demolding mechanism according to claim 5, characterized in that, The straight inclined ejector block ejection assembly includes a plurality of intermediate inclined ejector blocks (16) arranged in the intermediate ejector block (14) and a plurality of straight ejector blocks (17). The intermediate inclined ejector blocks (16) are hinged to the top plate (4) through intermediate inclined ejector rods. The straight ejector blocks (17) are fixedly connected to the top plate (4) through second straight ejector rods.

7. The large automotive bumper injection mold with a direct top and inclined top demolding mechanism according to claim 3, characterized in that, An inclined guiding structure is further provided between the lower template (1) and the side inclined ejector block (5).

8. The large automotive bumper injection mold with a direct-top and inclined-top demolding mechanism according to claim 7, wherein The inclined guiding structure includes an inclined guiding plate (18) fixed on the lower template (1) through a plurality of screws. The inclined guiding plate (18) is inserted into an inclined guiding groove on the side of the side inclined ejector block (5).

9. The large automotive bumper injection mold with a direct-top and inclined-top demolding mechanism according to claim 1, characterized in that, Two first side core-pulling assemblies and four second side core-pulling assemblies are further provided on the side of the lower template (1). The first side core-pulling assemblies and the second side core-pulling assemblies are located on the same side of the lower template (1). The first side core-pulling assemblies are located below the second side core-pulling assemblies.

10. The large automotive bumper injection mold with a direct top and inclined top demolding mechanism according to claim 9, characterized in that, The described first side core-pulling assembly includes a tunnel insert block (19) that slides through the lower template (1). The tunnel insert block (19) horizontally penetrates the lower template (1) and its inner end is inserted into the molding cavity. A translation driver connected to the tunnel insert block (19) is also provided on the lower template (1). The described second side core-pulling assembly includes a side insert block (20) slidably arranged on the top of the lower template (1) and a driving rod (21) that is obliquely inserted into the side insert block (20). The top end of the driving rod (21) is fixed to the upper template.

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