Adsorption hole site strength and flash improvement structure of automobile instrument panel injection mold

Abstract

According to the technical scheme, the adsorption hole site strength and flash improvement structure of the automobile instrument panel injection mold comprises a core plate, a series of bosses corresponding to instrument panel adsorption holes are arranged on the core plate, each boss comprises a cylindrical part located on the upper portion and a conical part located on the lower portion, and the cylindrical parts are arranged on the cylindrical parts. The outer diameter of the top end of the conical part is consistent with the outer diameter of the bottom end of the cylindrical part, the height n of the cylindrical part ranges from 0.4 mm to 0.6 mm, the diameter m of the cylindrical part ranges from 0.8 mm to 1.2 mm, and the included angle b between the two opposite side faces of the conical part ranges from 30 degrees to 60 degrees. According to the utility model, the structural strength of the boss is improved, and the precision of the hole site of the injection molding instrument board can be still kept after multiple times of mold repair.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to an improved structure for improving the adsorption hole strength and flash of an injection mold for an automobile instrument panel. Background Art

[0002] The car dashboard is an important part of the car interior, and its surface needs to be covered with soft leather. If the surface of the dashboard is smooth, then there will be bulging during the soft leather covering process, and the fit will be uneven, and it will fall off over time. Therefore, a series of adsorption hole structures are set on the surface of the car dashboard, such as Figure 1 As shown in the figure, this can effectively ensure that the soft leather fits smoothly. Therefore, a series of boss structures for injection molding adsorption holes will be set on the core plate of the mold, such as Figure 2 As shown, in order to facilitate demoulding, the angle a is set between 5° and 10°, and the length of m is about 1mm, which corresponds to the aperture of the adsorption hole. The setting of this boss structure on the core plate can meet the requirements of injection molding in a short time, but as the injection time of the mold increases, the aperture of the molded product will become smaller, flash will be generated, and even blockage will occur, which will cause the molded product to be scrapped. Therefore, mold repair is required. With multiple mold repairs, the top surface of the boss will drop, resulting in a larger and larger aperture, and the molded product will not meet the design requirements. In addition, the boss may break during the mold repair process. Utility Model Content

[0003] In view of the above problems, the utility model aims to provide a structure for improving the adsorption hole strength and flash of an automobile instrument panel injection mold, which has a novel structure and can maintain the accuracy of the injection molded instrument panel hole after multiple mold repairs.

[0004] The technical solution of the utility model is a structure for improving the strength and flash of the adsorption holes of an automobile instrument panel injection mold, comprising a core plate, on which a series of bosses corresponding to the adsorption holes of the instrument panel are arranged, the bosses comprising a cylindrical portion located at an upper portion and a conical portion located at a lower portion, the outer diameter of the top end of the conical portion is consistent with the outer diameter of the bottom end of the cylindrical portion, the height n of the cylindrical portion is 0.4mm-0.6mm, the diameter m of the cylindrical portion is 0.8mm-1.2mm, and the angle b between the two relative side surfaces of the conical portion is 30°-60°.

[0005] Preferably, the height n of the columnar portion is 0.5 mm, the diameter m of the columnar portion is 1 mm, and the angle b between the two relative side surfaces of the conical portion is 45°.

[0006] The utility model changes the original boss structure, improves the structural strength of the boss, and can maintain the accuracy of the hole position of the injection-molded instrument panel after multiple mold repairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of a car dashboard;

[0008] Figure 2 It is a structural schematic diagram of a boss on a core plate of an existing injection mold for an automobile instrument panel;

[0009] Figure 3 It is a structural schematic diagram of the boss on the medium-sized core plate of the utility model;

[0010] Figure 4 It is a schematic diagram of the structure of the utility model;

[0011] Figure 5 It is a structural schematic diagram of the medium-sized core board of the utility model;

[0012] Figure 6 It is a schematic diagram of the local structure of the medium-sized core plate of the utility model;

[0013] Among them: 1 - core plate; 2 - boss; 21 - columnar portion; 22 - conical portion. DETAILED DESCRIPTION

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0015] like Figures 3 to 6 As shown, the utility model provides an improvement structure for the strength and flash of the adsorption holes of an automobile instrument panel injection mold, comprising a core plate 1, on which a series of bosses 2 corresponding to the adsorption holes of the instrument panel are arranged, the bosses 2 comprising a cylindrical portion 21 located at an upper portion and a conical portion 22 located at a lower portion, the outer diameter of the top end of the conical portion 22 is consistent with the outer diameter of the bottom end of the cylindrical portion 21, the height n of the cylindrical portion 21 is 0.4mm-0.6mm, the diameter m of the cylindrical portion 21 is 0.8mm-1.2mm, and the angle b between the two relative side surfaces of the conical portion 22 is 30°-60°.

[0016] Preferably, the height n of the columnar portion 21 is 0.5 mm, the diameter m of the columnar portion 21 is 1 mm, and the angle b between the two opposite side surfaces of the conical portion 22 is 45°.

[0017] In the present invention, the injection mold needs to be repaired after multiple injections. During the repair process, the top of the columnar portion 21 will be worn and the top surface will drop. However, the outer diameter of the top of the columnar portion 21 will not change, and the corresponding adsorption hole diameter will not change, and the design requirements will still be met. After multiple repairs, the adsorption holes injected will still meet the design requirements. In addition, the large angle design of the tapered portion 22 can effectively improve the strength of the boss 2, and the boss 2 will not break during the repair process, thereby improving the stability of the entire mold structure.

[0018] The above description is only a preferred implementation mode of the utility model, and does not impose any form of limitation on the utility model. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. A structure for improving the adsorption hole strength and flash of an automobile instrument panel injection mold, comprising a core plate (1), characterized in that: The core plate (1) is provided with a series of bosses (2) corresponding to the suction holes of the instrument panel, the bosses (2) comprising a columnar portion (21) located at an upper portion and a conical portion (22) located at a lower portion, the outer diameter of the top end of the conical portion (22) being consistent with the outer diameter of the bottom end of the columnar portion (21), the height n of the columnar portion (21) being 0.4 mm-0.6 mm, the diameter m of the columnar portion (21) being 0.8 mm-1.2 mm, and the angle b between the two opposite side surfaces of the conical portion (22) being 30°-60°.

2. The automobile instrument panel injection mold adsorption hole strength and flash improvement structure according to claim 1, characterized in that: The height n of the columnar portion (21) is 0.5 mm, the diameter m of the columnar portion (21) is 1 mm, and the angle b between the two relative side surfaces of the conical portion (22) is 45°.

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