Push block auxiliary demolding mechanism for internal parting type automobile bumper mold

Abstract

The utility model provides a push block auxiliary demolding mechanism of an internal parting type automobile bumper mold, and belongs to the technical field of molds. The die comprises an upper die plate and a lower die plate, a forming cavity is formed between the upper die plate and the lower die plate, a forming insert is arranged on the lower die plate in a protruding mode, and the forming insert is composed of a middle insert and two side inserts. A second push block demolding assembly on the side insert can horizontally move in the direction away from the inverted buckle forming part when the side insert obliquely moves upwards so that the second push block demolding assembly can be separated from the inverted buckle position of the product. The first push block demolding assembly on the side insert can exert horizontal outward thrust on the side portion of the product when the side insert obliquely moves upwards so that the side portion of the product can be separated from the side insert, and product damage caused by too large pulling force between the inner parting surface and the side portion of the product can be prevented.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an auxiliary demolding mechanism for push blocks in an internal parting type automobile bumper mold. Background Technology

[0002] Car bumpers are generally injection molded using molds. The inner parting surfaces on both sides of the car bumper mold experience significant tension during ejection, which can easily damage the product. Secondly, the bottom of both sides of the bumper has an undercut structure. In existing technology, the bumper is ejected by directly pushing the product upwards. During this process, the undercut structure is often damaged, resulting in a low product qualification rate.

[0003] For example, a Chinese patent discloses an automobile bumper mold [application number: 201621240873.0], which includes a mold body. The mold body needs to be provided with a hole-opening mechanism at the hole opening on the bumper. The hole-opening mechanism includes a cylindrical receiving hole provided on the mold body. A hole-opening post for opening the hole is provided in the receiving hole. A locking mechanism for locking the hole-opening post and completely receiving it in the receiving hole is provided between the hole-opening post and the receiving hole. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing an auxiliary demolding mechanism for push blocks in internal parting automotive bumper molds.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A push-block auxiliary demolding mechanism for an internally parted car bumper mold includes an upper template and a lower template. A forming cavity is provided between the upper and lower templates. A forming insert protrudes from the lower template. The forming insert consists of a middle insert and two side inserts. The two side inserts are symmetrically arranged and their tops abut against the bottom sides of the middle insert. An internal parting surface is formed on the outer side wall of the side insert. A first push-block demolding assembly and a second push-block demolding assembly are also provided on the side insert. The first push-block demolding assembly is located inside the forming cavity. An undercut forming part connected to the internal parting surface is formed between the second push-block demolding assembly and the side insert. The second push-block demolding assembly is located below the first push-block demolding assembly.

[0007] In the above-mentioned internal parting car bumper mold push block auxiliary demolding mechanism, the second push block demolding component includes an outer push block that slides with the side insert through a first push-pull rod. The undercut forming part is located between the outer push block and the side insert. The lower template is provided with a first guide structure connected to the first push-pull rod.

[0008] In the above-mentioned internal parting car bumper mold push block auxiliary demolding mechanism, the first guide structure includes a first guide seat fixed on the lower template, and the first guide seat is provided with a first guide rail that is inclined to the side away from the molding cavity and connected to the first push-pull rod.

[0009] In the above-mentioned internal parting car bumper mold push block auxiliary demolding mechanism, the bottom of the middle insert is fixedly connected to a straight push rod connected to the top plate, and the bottom of the side insert is fixedly connected to an inclined push rod connected to the top plate. The inclined push rod is inclined towards the center of the lower mold plate.

[0010] In the aforementioned internal parting car bumper mold push block auxiliary demolding mechanism, the first push block demolding component includes two inner push blocks arranged in a V-shape. The inner push blocks are slidably engaged with the side inserts via a second push-pull rod. The lower template is also provided with a second guide structure connected to the second push-pull rod.

[0011] In the above-mentioned internal parting car bumper mold push block auxiliary demolding mechanism, the second guide structure includes a second guide seat fixed on the lower template, and the second guide seat is provided with a second guide rail that is inclined to the side away from the molding cavity and connected to the second push-pull rod.

[0012] In the aforementioned internal parting car bumper mold push block auxiliary demolding mechanism, the inclination of the second guide rail is less than that of the first guide rail.

[0013] In the aforementioned internal parting car bumper mold push block auxiliary demolding mechanism, the front side of the upper template is also provided with an inverted core-pulling assembly corresponding to the side insert.

[0014] In the aforementioned internal parting car bumper mold push block auxiliary demolding mechanism, the inverted core-pulling assembly includes a core-pulling seat slidably disposed on the upper template, a core block that abuts against the side insert is fixedly connected to the inner end of the core-pulling seat, and a driving structure disposed on the lower template.

[0015] In the aforementioned internal parting car bumper mold push block auxiliary demolding mechanism, the driving structure includes a driving rod that is tilted and fixed on the lower template, and the driving rod is inserted into the core-pulling seat.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The molding cavity between the upper and lower mold plates can be injection molded to form a car bumper product. After the product is injection molded, the top plate moves upward, which can drive the middle insert to move vertically upward, and at the same time drive the side insert to move obliquely upward, applying a pushing force to the product. The second push block demolding component on the side insert can move away from the undercut molding part when the side insert moves obliquely upward, so that the second push block demolding component is separated from the undercut position of the product. The first push block demolding component on the side insert can also apply a horizontal outward pushing force to the side of the product when the side insert moves obliquely upward, so that the side of the product is separated from the side insert, which can prevent the product from being damaged due to excessive pulling force between the inner parting surface and the side of the product.

[0018] 2. When the side insert moves obliquely upward, under the guidance of the first guide structure, it can drive the outer push block to move away from the undercut forming part through the first push-pull rod, thereby enabling the outer push block to disengage from the undercut position of the product.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention;

[0021] Figure 2 This is a structural diagram of the lower template;

[0022] Figure 3 This is a schematic diagram of the structure of the center insert and the side inserts;

[0023] Figure 4 This is a schematic diagram of the structure on the outer side of the side insert;

[0024] Figure 5 This is a schematic diagram of the structure inside the side insert;

[0025] Figure 6 yes Figure 1 Enlarged diagram of point A in the middle.

[0026] In the figure, the upper template 1, lower template 2, molding cavity 3, molding insert 4, middle insert 5, side insert 6, inner parting surface 7, inverted molding part 8, push-pull rod 1 9, outer push block 10, guide seat 11, guide rail 12, inclined push rod 13, inner push block 14, push-pull rod 2 15, guide seat 2 16, inverted core-pulling assembly 17, core-pulling seat 18, core block 19, and drive rod 20. Detailed Implementation

[0027] like Figures 1-6As shown, an auxiliary demolding mechanism for an internally parted car bumper mold includes an upper template 1 and a lower template 2. A forming cavity 3 is provided between the upper template 1 and the lower template 2. A forming insert 4 protrudes from the lower template 2. The forming insert 4 consists of a middle insert 5 and two side inserts 6. The two side inserts 6 are symmetrically arranged and their tops abut against the bottom sides of the middle insert 5. An internal parting surface 7 is formed on the outer side wall of the side insert 6. A first push-block demolding assembly and a second push-block demolding assembly are also provided on the side insert 6. The first push-block demolding assembly is located inside the forming cavity 3. An undercut forming part 8 connected to the internal parting surface 7 is formed between the second push-block demolding assembly and the side insert 6. The second push-block demolding assembly is located below the first push-block demolding assembly.

[0028] In this invention, the molding cavity between the upper and lower mold plates can be injection molded to form a car bumper product. After the product is injection molded, the top plate moves upward, which can drive the middle insert to move vertically upward, and at the same time drive the side insert to move obliquely upward, applying a pushing force to the product. The second push block demolding component on the side insert can move away from the undercut molding part when the side insert moves obliquely upward, so that the second push block demolding component is disengaged from the undercut position of the product. The first push block demolding component on the side insert can also apply a horizontal outward pushing force to the side of the product when the side insert moves obliquely upward, so that the side of the product can be disengaged from the side insert, which can prevent the product from being damaged due to excessive pulling force between the inner parting surface and the side of the product.

[0029] Specifically, the second push block demolding assembly includes an outer push block 10 that slides with the side insert 6 via a first push-pull rod 9. The undercut forming part 8 is located between the outer push block 10 and the side insert 6. The lower template 2 is provided with a first guide structure connected to the first push-pull rod 9. When the side insert moves obliquely upward, under the guidance of the first guide structure, the outer push block can be driven by the first push-pull rod to translate away from the undercut forming part, thereby disengaging the outer push block from the undercut position of the product.

[0030] Specifically, the first guide structure includes a first guide seat 11 fixed on the lower template 2. The first guide seat 11 is provided with a first guide rail 12 that is inclined away from the molding cavity 3 and connected to the first push-pull rod 9. When the side insert moves obliquely upward, it can drive the first push-pull rod to slide along the first guide rail. When the first push-pull rod slides along the first guide rail, it can drive the outer push block to translate away from the undercut molding part, thereby disengaging the outer push block from the undercut position of the product.

[0031] Specifically, the bottom of the middle insert 5 is fixedly connected to a straight push rod that is connected to the top plate, and the bottom of the side insert 6 is fixedly connected to an inclined push rod 13 that is connected to the top plate. The inclined push rod 13 is inclined towards the center of the lower template 2. When the product is ejected, the upward movement of the top plate can drive the middle insert to move vertically upward through the straight push rod, and can also drive the side insert to move obliquely upward towards the center of the lower template through the inclined push rod.

[0032] Specifically, the first ejector block demolding assembly includes two inner ejector blocks 14 arranged in a V-shape. The inner ejector blocks 14 are slidably engaged with the side insert 6 via a second push-pull rod 15. The lower template 2 is also provided with a second guide structure connected to the second push-pull rod 15. When the side insert moves obliquely upward, under the guidance of the second guide structure, the second push-pull rod can drive the inner ejector blocks to apply a horizontal outward pushing force to the side of the product, thereby enabling the side of the product to separate from the inner parting surface on the side insert, preventing damage to the side of the product during ejection.

[0033] Specifically, the second guide structure includes a second guide seat 16 fixed on the lower template 2. The second guide seat 16 is provided with a second guide rail that is inclined away from the molding cavity 3 and connected to the second push-pull rod 15. When the side insert moves obliquely upward, it can drive the second push-pull rod to slide along the second guide rail. When the second push-pull rod slides along the second guide rail, it can drive the inner push block to move horizontally outward, thereby applying a force to the side of the product to separate it from the inner parting surface.

[0034] Specifically, the tilt angle of guide rail number 2 is less than that of guide rail number 12.

[0035] Specifically, the upper template 1 also has an inverted core-pulling assembly 17 on its front side, corresponding to the side insert 6. The inverted core-pulling assembly 17 includes a core-pulling seat 18 slidably disposed on the upper template 1, with a core block 19 fixedly connected to its inner end to abut against the side insert 6. It also includes a driving structure disposed on the lower template 2. The core-pulling seat 18 is slidably disposed on the upper template. When the mold is opened, as the upper template moves upward, the driving structure can drive the core-pulling seat to move horizontally outward, thereby realizing the automatic core pulling of the core block.

[0036] Specifically, the driving structure includes a driving rod 20 that is tilted and fixed on the lower template 2, and the driving rod 20 is inserted into the core-pulling seat 18. When the upper template moves upward, the core-pulling seat can move horizontally outward under the action of the driving rod 20.

[0037] The working principle of this utility model is as follows: the molding cavity between the upper and lower templates can be injection molded to form a car bumper product. After the product is injection molded, the top plate moves upward, which can drive the middle insert to move vertically upward, and at the same time drive the side insert to move obliquely upward, applying a pushing force to the product. The second push block demolding component on the side insert can move away from the undercut molding part when the side insert moves obliquely upward, so that the second push block demolding component is separated from the undercut position of the product. The first push block demolding component on the side insert can also apply a horizontal outward pushing force to the side of the product when the side insert moves obliquely upward, so that the side of the product can be separated from the side insert, which can prevent the product from being damaged due to excessive pulling force between the inner parting surface and the side of the product.

[0038] When the side insert moves obliquely upward, under the guidance of the first guide structure, it can drive the outer push block to move away from the undercut forming part through the first push-pull rod, thereby disengaging the outer push block from the undercut position of the product. When the side insert moves obliquely upward, it can drive the first push-pull rod to slide along the first guide rail. When the first push-pull rod slides along the first guide rail, it can drive the outer push block to move away from the undercut forming part, thereby disengaging the outer push block from the undercut position of the product.

[0039] When the product is ejected, the top plate moves upward, which can drive the middle insert to move vertically upward through the straight push rod. It can also drive the side insert to move obliquely upward towards the center of the lower template through the inclined push rod. When the side insert moves obliquely upward, under the guidance of the second guide structure, it can drive the inner push block to apply a horizontal outward pushing force to the side of the product through the second push rod, so that the side of the product can be separated from the inner parting surface on the side insert, to prevent the side of the product from being damaged during ejection. When the side insert moves obliquely upward, it can drive the second push rod to slide along the second guide rail. When the second push rod slides along the second guide rail, it can drive the inner push block to move horizontally outward, so that the side of the product can be subjected to a force to separate from the inner parting surface.

[0040] The core-pulling seat 18 is slidably set on the upper template. When the mold is opened, the upper template moves upward, and the core-pulling seat can be driven to move horizontally outward through the driving structure, thereby realizing the automatic core pulling of the core block. When the upper template moves upward, the core-pulling seat can move horizontally outward under the action of the driving rod 20.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0042] Although this article frequently uses terms such as upper template 1, lower template 2, molding cavity 3, molding insert 4, middle insert 5, side insert 6, inner parting surface 7, inverted molding part 8, first push-pull rod 9, outer push block 10, first guide seat 11, first guide rail 12, inclined push rod 13, inner push block 14, second push-pull rod 15, second guide seat 16, inverted core-pulling assembly 17, core-pulling seat 18, core block 19, and drive rod 20, these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A push-block auxiliary demolding mechanism for an internally parted automobile bumper mold, comprising an upper template (1) and a lower template (2), characterized in that, A molding cavity (3) is provided between the upper template (1) and the lower template (2). A molding insert (4) is provided on the lower template (2). The molding insert (4) is composed of a middle insert (5) and two side inserts (6). The two side inserts (6) are symmetrically arranged and their tops abut against the bottom sides of the middle insert (5). An inner parting surface (7) is formed on the outer side wall of the side insert (6). A first push block demolding component and a second push block demolding component are also provided on the side insert (6). The first push block demolding component is located inside the molding cavity (3). An undercut molding part (8) connected to the inner parting surface (7) is formed between the second push block demolding component and the side insert (6). The second push block demolding component is located below the first push block demolding component.

2. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 1, characterized in that, The second push block demolding assembly includes an outer push block (10) that slides with the side insert (6) via a first push-pull rod (9). The undercut forming part (8) is located between the outer push block (10) and the side insert (6). The lower template (2) is provided with a first guide structure connected to the first push-pull rod (9).

3. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 2, characterized in that, The first guide structure includes a first guide seat (11) fixed on the lower template (2), and the first guide seat (11) is provided with a first guide rail (12) that is inclined to the side away from the forming cavity (3) and connected to the first push-pull rod (9).

4. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 1, characterized in that, The bottom of the middle insert (5) is fixed with a straight push rod connected to the top plate, and the bottom of the side insert (6) is fixed with an inclined push rod (13) connected to the top plate. The inclined push rod (13) is inclined towards the center of the lower template (2).

5. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 3, characterized in that, The first push block demolding assembly includes two inner push blocks (14) arranged in a V-shape. The inner push blocks (14) are slidably engaged with the side insert (6) through the second push rod (15). The lower template (2) is also provided with a second guide structure connected to the second push rod (15).

6. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 5, characterized in that, The second guide structure includes a second guide seat (16) fixed on the lower template (2), and the second guide seat (16) is provided with a second guide rail that is inclined to the side away from the forming cavity (3) and connected to the second push-pull rod (15).

7. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 6, characterized in that, The inclination of the second guide rail is less than that of the first guide rail (12).

8. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 7, characterized in that, The upper template (1) is also provided with an inverted core-pulling assembly (17) on the front side, which corresponds to the side insert (6).

9. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 8, characterized in that, The inverted core-pulling assembly (17) includes a core-pulling seat (18) slidably disposed on the upper template (1), and a core block (19) that abuts against the side insert (6) is fixedly connected to the inner end of the core-pulling seat (18). It also includes a driving structure disposed on the lower template (2).

10. The internal parting car bumper mold push block auxiliary demolding mechanism according to claim 9, characterized in that, The drive structure includes a drive rod (20) that is tilted and fixed on the lower template (2), and the drive rod (20) is inserted into the core-pulling seat (18).

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