Upper guard plate injection mold

Abstract

The utility model provides an upper guard plate injection mold, which belongs to the technical field of injection molding and comprises a fixed mold and a movable mold, a positioning structure for guiding the movable mold during mold opening and closing is arranged on a parting surface between the fixed mold and the movable mold, and the positioning structure comprises a positioning bump and a positioning groove in sliding fit with the positioning bump; the positioning protruding block is selectively arranged on the movable mold or the fixed mold, and the positioning groove is formed in the fixed mold or the movable mold in a matched mode. According to the upper guard plate injection mold provided by the utility model, the positioning convex block and the positioning groove which are matched between the fixed mold and the movable mold have positioning and guiding effects on the mold opening and closing process of the movable mold, so that the accurate positioning of the movable mold and the fixed mold of the mold is ensured, the surface-to-surface contact of a collision surface is ensured, and the acting force in the non-mold opening and closing direction is eliminated; the problems that parting surfaces of the movable mold and the fixed mold are in non-parallel contact and abrade with each other, and burrs of products are generated are solved, and the quality of the products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding, and in particular relates to an injection mold for an upper guard plate. Background Art

[0002] In the injection molding structure, due to product shape limitations, the mold parting surface and the demolding direction are not at 90° but at a certain angle. It is necessary to design a friction structure at the friction position of the mold parting surface. However, this structure is very prone to island fractures, surface wear and tear, and burrs, which seriously affect product quality and maintenance quality.

[0003] For example, for the molding die of the upper guard plate of the A-pillar of the car, there are the following problems in the collision position: (1) The product surface is a single-sided concave structure, and there is relative movement with the surface during the opening and closing of the mold. When the positioning deviation occurs, the surface is prone to local force problems and wear; (2) The product surface has a movable slider, and there is relative movement between the movable mold and the fixed mold during the opening and closing of the mold, which is prone to wear. Therefore, the parting surface of the left and right A-pillar upper guard plates of the car is prone to wear due to the non-parallel contact between the surfaces and relative movement. The product burrs frequently occur, seriously affecting the product quality. Utility Model Content

[0004] The embodiment of the utility model provides an upper guard plate injection mold, which aims to avoid the force acting on the movable mold and the fixed mold in the non-opening and closing mold directions, and solve the problem of product wear and burrs.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an upper guard plate injection mold, including: a fixed mold and a movable mold, a positioning structure for guiding the movable mold when opening and closing the mold is arranged on the parting surface between the fixed mold and the movable mold, and the positioning structure includes a positioning protrusion and a positioning groove that can slidably cooperate with the positioning protrusion; the positioning protrusion can be selectively arranged on the movable mold or the fixed mold, and the positioning groove is cooperatively arranged on the fixed mold or the movable mold.

[0006] In one achievable manner, the positioning protrusion is in a conical or prism shape, so that the side surface of the positioning protrusion forms a guiding inclined surface for facilitating insertion into the positioning groove.

[0007] In one achievable manner, the included angle between the guiding inclined surface and the center line of the positioning protrusion is less than 10°.

[0008] In one achievable manner, the positioning protrusion is fixed to the movable mold or the fixed mold by a countersunk screw.

[0009] In one achievable manner, the depth of the positioning groove is at least greater than the height of the positioning protrusion.

[0010] In one achievable manner, the depth of the positioning groove is greater than the height of the positioning protrusion in the range of 0.2-0.5 mm.

[0011] In one practicable manner, the positioning protrusion is surrounded by a wear-resistant plate.

[0012] In one achievable manner, the wear-resistant plate is detachably fastened to the positioning protrusion by means of countersunk screws.

[0013] In one achievable manner, the wear-resistant plate has a thickness ranging from 4 to 6 mm.

[0014] In one achievable manner, the positioning structures are symmetrically arranged on two opposite sides of the movable mold, and the positioning structures are arranged on the longitudinal or transverse center line of the movable mold.

[0015] Compared with the prior art, the upper guard plate injection mold provided by the utility model has the following beneficial effects: the positioning protrusions and positioning grooves matched between the fixed mold and the movable mold have a guiding effect on the opening and closing process of the movable mold, avoiding the non-parallel contact and mutual wear of the parting surfaces between the movable mold and the fixed mold, and the problem of burrs on the product, thereby improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the movable mold of the upper guard plate injection mold provided by the embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the three-dimensional structure of the fixed mold of the upper guard plate injection mold provided by the embodiment of the utility model;

[0018] Description of reference numerals:

[0019] 1. Moving mold; 11. Positioning protrusion; 12. Wear-resistant plate; 2. Fixed mold; 21. Positioning groove. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Please also read Figure 1 and Figure 2The upper guard plate injection mold provided by the utility model is now described. The upper guard plate injection mold comprises a fixed mold 2 and a movable mold 1. A positioning structure for guiding the movable mold 1 when opening and closing the mold is arranged on the parting surface between the fixed mold 2 and the movable mold 1. The positioning structure comprises a positioning protrusion 11 and a positioning groove 21 that can slidably match the positioning protrusion 11; the positioning protrusion 11 can be selectively arranged on the movable mold 1 or the fixed mold 2, and the positioning groove 21 is matchedly arranged on the fixed mold 2 or the movable mold 1.

[0022] The upper guard plate injection mold provided by the utility model cooperates with the positioning protrusion 11 and the positioning groove 21 between the fixed mold 2 and the movable mold 1, and has a positioning and guiding function for the opening and closing process of the movable mold 1, thereby ensuring the precise positioning of the movable and fixed molds 2, ensuring the surface-to-surface contact of the rubbing surfaces, eliminating the forces in the non-opening and closing directions of the mold, avoiding the problems of non-parallel contact of the parting surfaces between the movable mold 1 and the fixed mold 2 and mutual wear, and the generation of burrs on the product, thereby improving the quality of the product.

[0023] In this embodiment, the positioning protrusion 11 is arranged on the movable mold 1, and the positioning groove 21 is arranged on the fixed mold 2; vice versa is also possible.

[0024] In some embodiments, see Figure 1 and Figure 2 As shown, the positioning protrusion 11 is in a conical or prism shape, so that the side of the positioning protrusion 11 forms a guiding inclined surface for easy insertion into the positioning groove 21. The side of the positioning protrusion 11 forms a guiding inclined surface, which facilitates the positioning protrusion 11 to be inserted into the positioning groove 21, improves the convenience of opening and closing the mold, and reduces the surface wear of the molding surface.

[0025] In some embodiments, see Figure 1 and Figure 2 As shown, the included angle between the guiding inclined surface and the center line of the positioning protrusion 11 is less than 10°. Preferably, the included angle is 8°, 7°, 5°, etc. That is, if the inclination angle of the guiding inclined surface is too large, it will cause the problem of unreliable positioning.

[0026] In some embodiments, see Figure 1 and Figure 2 As shown, the positioning protrusion 11 is fixed on the movable mold 1 or the fixed mold 2 by a countersunk screw. The positioning protrusion 11 is fixed by a countersunk screw, and is easy to disassemble and replace after severe wear or other collisions.

[0027] In some embodiments, see Figure 1 and Figure 2 As shown, the depth of the positioning groove 21 is at least greater than the height of the positioning protrusion 11 to ensure that there is no interference between the movable mold 1 and the fixed mold 2 after the mold is closed.

[0028] In some embodiments, see Figure 1 and Figure 2As shown, the depth of the positioning groove 21 is greater than the height of the positioning protrusion 11 in the range of 0.2-0.5 mm. For example, the depth of the positioning groove 21 can be greater than the height of the positioning protrusion 11 by 0.2 mm, 0.3 mm, 0.4 mm, etc., so as to avoid the problem that the positioning protrusion 11 interferes with the parting surface after mold closing, and the parting surface cannot be closed tightly.

[0029] In some embodiments, see Figure 1 and Figure 2 As shown, the positioning protrusion 11 is surrounded by a wear-resistant plate 12. The wear-resistant plate 12 protects the positioning protrusion 11 and reduces the wear of the positioning protrusion 11. Moreover, the thickness of the wear-resistant plate 12 on different surfaces can be adjusted to facilitate the precise adjustment of the movable mold 1 and the fixed mold 2.

[0030] In some embodiments, see Figure 1 and Figure 2 As shown, the wear-resistant plate 12 is detachably fastened to the positioning protrusion 11 by countersunk screws. When the wear-resistant plate 12 is seriously worn, it is convenient to replace a new wear-resistant plate 12 by removing the countersunk screws.

[0031] In some embodiments, see Figure 1 and Figure 2 As shown, the thickness of the wear-resistant plate 12 ranges from 4 to 6 mm. For example, the thickness of the wear-resistant plate 12 is 4 mm, 5 mm, etc.

[0032] In some embodiments, see Figure 1 and Figure 2 As shown, the movable mold 1 is symmetrically provided with positioning structures on both sides opposite to each other, and the positioning structures are arranged on the longitudinal or transverse center line of the movable mold 1. Two sets of positioning structures are arranged between the movable mold 1 and the fixed mold 2, one in front and one behind, or one on the left and one on the right, which is conducive to ensuring that the rubbing surfaces are parallel and pressed during the opening and closing of the mold, and eliminating the burr problem caused by the wear of the molding surface.

[0033] Optionally, the positioning protrusions 11 in the two groups of positioning structures may have different outer dimensions and shapes, for example, one is in the shape of a regular pyramid and the other is in the shape of a pyramid with a rectangular bottom surface.

[0034] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An upper guard plate injection mold, characterized in that: include: A fixed mold (2) and a movable mold (1), wherein a positioning structure for guiding the movable mold (1) when opening and closing the mold is arranged on the parting surface between the fixed mold (2) and the movable mold (1), and the positioning structure comprises a positioning protrusion (11) and a positioning groove (21) slidably matched with the positioning protrusion (11); the positioning protrusion (11) can be selectively arranged on the movable mold (1) or the fixed mold (2), and the positioning groove (21) is matchedly arranged on the fixed mold (2) or the movable mold (1); The positioning protrusion (11) is surrounded by a wear-resistant plate (12).

2. The upper guard plate injection mold according to claim 1, characterized in that: The positioning protrusion (11) is in the shape of a cone or a prism, so that the side surface of the positioning protrusion (11) forms a guiding inclined surface that is convenient for inserting into the positioning groove (21).

3. The upper guard plate injection mold according to claim 2, characterized in that: The included angle between the guiding inclined surface and the center line of the positioning protrusion (11) is less than 10°.

4. The upper guard plate injection mold according to claim 1, characterized in that: The positioning protrusion (11) is fixed on the movable mold (1) or the fixed mold (2) by means of a countersunk screw.

5. The upper guard plate injection mold according to claim 1, characterized in that: The depth of the positioning groove (21) is at least greater than the height of the positioning protrusion (11).

6. The upper guard plate injection mold according to claim 5, characterized in that: The depth of the positioning groove (21) is greater than the height of the positioning protrusion (11) in the range of 0.2-0.5 mm.

7. The upper guard plate injection mold according to claim 1, characterized in that: The wear-resistant plate (12) is detachably fastened to the positioning protrusion (11) by means of countersunk screws.

8. The upper guard plate injection mold according to claim 1, characterized in that: The thickness of the wear-resistant plate (12) is in the range of 4-6 mm.

9. The upper guard plate injection mold according to any one of claims 1 to 8, characterized in that: The positioning structures are symmetrically arranged on two opposite sides of the movable mold (1), and the positioning structures are arranged on the longitudinal or transverse center line of the movable mold (1).

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