Asymmetric side die structure of low-pressure casting hub die

Abstract

The utility model relates to the technical field of hub casting molds, and discloses an asymmetric side mold structure of a low-pressure casting hub mold, which comprises a first side mold unit, a second side mold unit, a third side mold unit and a fourth side mold unit, the length of the inner arc of the fan-shaped structure of the first side die unit is larger than that of the second side die unit, the third side die unit and the fourth side die unit, so that the inner side of the first side die unit is provided with two arrangement spaces with counterweight shapes. By arranging the asymmetric side die structure, the problem that when a hub product with five balance weight models evenly distributed on a rim is cast through a traditional side die, the balance weight models of a hub blank have burrs is solved, the trouble of manual polishing and removing is avoided, the labor intensity of workers is reduced, and the influence on the appearance quality of the product is avoided; and through the arrangement of balancing weights on the second side die unit and the fourth side die unit, the gravity balance of the side die units is maintained, the problem of deflection of the die opening and closing push-pull die unit is avoided, and the production stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub casting molds, in particular to an asymmetric side mold structure of a low-pressure casting wheel hub mold. Background Art

[0002] A low-pressure casting mold for aluminum alloy wheels typically consists of a top mold, a bottom mold, and side molds. During casting, these three molds combine to form the casting cavity. Currently, the side mold typically consists of four side mold units, each symmetrically divided by the entire side mold. Each side mold unit is fan-shaped with a 90° center angle, and the inner arc length of each side mold unit is consistent. During casting, the four side mold units merge by joining the parting surfaces to form a perfectly circular side mold unit, which is used to form the rim portion of the wheel hub.

[0003] In actual production, as shown in the attached Figure 1 As shown, when casting a wheel hub product with five counterweights evenly distributed on the rim, the five counterweights cannot avoid the joint parting surfaces of the four side mold units, resulting in two of the counterweights being split between two adjacent side mold units. During the casting process, burrs inevitably appear on the joint parting surfaces between the side mold units. Since the counterweights are not processed after casting, the burrs on the counterweights can only be removed through manual polishing, which increases labor costs and reduces production efficiency. Furthermore, manual polishing is ineffective and inconsistent, affecting the product's appearance quality.

[0004] Based on this, developing an asymmetric side mold structure for low-pressure casting wheel hub mold and applying it to actual production is an urgent problem to be solved. Utility Model Content

[0005] The purpose of the utility model is to address the above-mentioned problems and provide an asymmetric side mold structure for a low-pressure casting wheel hub mold to solve the problems of the existing low-pressure casting wheel hub mold having five counterweight molds evenly distributed on the casting rim, in which the five counterweight molds cannot completely avoid the splicing parting surface of the four side mold units, resulting in poor burr treatment effect and poor consistency on the counterweight molds, high labor intensity and low efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An asymmetric side mold structure for a low-pressure casting wheel hub mold includes a first side mold unit, a second side mold unit, a third side mold unit, and a fourth side mold unit. The inner arc length of the fan-shaped structure of the first side mold unit is longer than that of the second side mold unit, the third side mold unit, and the fourth side mold unit, so that the inner side of the first side mold unit has space for arranging two counterweight shapes.

[0008] Preferably, two counterweight shapes are provided on the inner side of the first side mold unit, and one counterweight shape is provided on the inner side of the second side mold unit, the third side mold unit and the fourth side mold unit respectively.

[0009] Preferably, the two counterweight shapes on the first side mold unit are symmetrically arranged, and the counterweight shape of the third side mold unit is centrally arranged.

[0010] Preferably, counterweight blocks are respectively provided on the second side mold unit and the fourth side mold unit in a direction away from the counterweight shape to maintain the gravity balance of the second side mold unit and the fourth side mold unit.

[0011] Preferably, the central angle of the fan-shaped structure of the first side mold unit is 126°, the central angle of the fan-shaped structure of the second side mold unit is 72°, the central angle of the fan-shaped structure of the third side mold unit is 90°, and the central angle of the fan-shaped structure of the fourth side mold unit is 72°.

[0012] The beneficial effects of the present invention are:

[0013] The utility model sets an asymmetric side mold structure so that the inner arc length of the fan-shaped structure of the first side mold unit is longer than that of the second side mold unit, the third side mold unit and the fourth side mold unit, so that the inner side of the first side mold unit has space for arranging two counterweight shapes, so that the five counterweight shapes can completely avoid the splicing parting surface between the first side mold unit, the second side mold unit, the third side mold unit and the fourth side mold unit, which solves the problem that when a traditional side mold has a hub product with five counterweight shapes evenly distributed on the casting rim, the two counterweight shapes must be divided into two adjacent side mold units, causing flash on the counterweight shape of the hub blank, thereby eliminating the trouble of manual grinding and removal, reducing labor intensity, and avoiding affecting the appearance quality of the product; by arranging counterweight blocks in the second side mold unit and the fourth side mold unit in the direction away from the counterweight shape, the gravity balance of the second side mold unit and the fourth side mold unit is maintained, effectively avoiding the problem of sinking in the process of opening and closing the mold and pushing and pulling the mold unit, and ensuring stable production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the side mold structure in the prior art.

[0016] Figure 2 It is a structural schematic diagram of the utility model in the mold closing state.

[0017] Figure 3 This is a structural diagram of the utility model in the mold opening state.

[0018] In the figure: 1--first side mold unit; 2--second side mold unit; 3--third side mold unit; 4--fourth side mold unit; 5--inner arc; 6--counterweight shape; 7--jointed parting surface; 8--counterweight block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figure 2-3 As shown, an asymmetric side mold structure for a low-pressure casting wheel hub mold includes a first side mold unit 1, a second side mold unit 2, a third side mold unit 3, and a fourth side mold unit 4. The inner arc 5 of the fan-shaped structure of the first side mold unit 1 is longer than that of the second, third, and fourth side mold units 2, 3, and 4, providing space for two counterweight moldings 6 inside the first side mold unit 1. The five counterweight moldings 6 are evenly distributed circumferentially by disposing two counterweight moldings 6 inside the first side mold unit 1 and one counterweight molding 6 inside each of the second, third, and fourth side mold units 2, 3, and 4. As a result, the five counterweight moldings 6 can completely avoid the joint parting surface 7 between the first side mold unit 1, the second side mold unit 2, the third side mold unit 3 and the fourth side mold unit 4, solving the problem that when a traditional side mold is used to cast a hub product with five counterweight moldings 6 evenly distributed on the rim, two counterweight moldings 6 will inevitably be divided into two adjacent side mold units, causing flash on the counterweight moldings 6 of the hub blank. This eliminates the trouble of manual grinding and removal, reduces labor intensity, and avoids affecting the appearance quality of the product.

[0021] In order to make the five counterweight shapes 6 evenly distributed on the inner side of the side mold and maintain the gravity balance of each side mold unit, and avoid weight imbalance during the opening and closing process of the mold, the two counterweight shapes 6 on the first side mold unit 1 are symmetrically arranged, and the counterweight shape 6 of the third side mold unit 3 is centrally arranged.

[0022] Because the counterweight moldings 6 installed on the second side mold unit 2 and the fourth side mold unit 4 are not centered, the second side mold unit 2 and the fourth side mold unit 4 have an asymmetrical structure. To balance gravity, counterweight blocks 8 are installed on the second side mold unit 2 and the fourth side mold unit 4 in a direction away from the counterweight moldings 6 to maintain the gravity balance of the second side mold unit 2 and the fourth side mold unit 4. This effectively avoids the problem of uneven sinking during the opening and closing of the mold and the pushing and pulling of the mold unit, ensuring stable production.

[0023] As a preferred embodiment, Figure 3As shown, the central angle of the fan-shaped structure of the first side mold unit 1 is 126°, the central angle of the fan-shaped structure of the second side mold unit 2 is 72°, the central angle of the fan-shaped structure of the third side mold unit 3 is 90°, and the central angle of the fan-shaped structure of the fourth side mold unit 4 is 72°. While ensuring that the five counterweight moldings 6 can completely avoid the splicing parting surface 7, the volume difference between the various mold units is minimized, which is beneficial to the processing and production of the side molds and facilitates process control during the production process.

[0024] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, any deformation made should be deemed to be protected by the present invention.

Claims

1. An asymmetric side mold structure for a low-pressure casting wheel hub mold, characterized by: The invention comprises a first side mold unit (1), a second side mold unit (2), a third side mold unit (3) and a fourth side mold unit (4), wherein the length of the inner arc (5) of the fan-shaped structure of the first side mold unit (1) is longer than that of the second side mold unit (2), the third side mold unit (3) and the fourth side mold unit (4), so that the inner side of the first side mold unit (1) has space for arranging two counterweight shapes (6).

2. The asymmetric side mold structure of a low-pressure casting wheel hub mold according to claim 1, characterized in that: Two counterweight shapes (6) are arranged on the inner side of the first side mold unit (1), and one counterweight shape (6) is arranged on the inner side of each of the second side mold unit (2), the third side mold unit (3), and the fourth side mold unit (4).

3. The asymmetric side mold structure of a low-pressure casting wheel hub mold according to claim 2, characterized in that: The two counterweight shapes (6) on the first side mold unit (1) are symmetrically arranged, and the counterweight shape (6) of the third side mold unit (3) is centrally arranged.

4. The asymmetric side mold structure of a low-pressure casting wheel hub mold according to claim 1, characterized in that: Counterweight blocks (8) are respectively provided on the second side mold unit (2) and the fourth side mold unit (4) in a direction away from the counterweight shape (6) to maintain the gravity balance of the second side mold unit (2) and the fourth side mold unit (4).

5. The asymmetric side mold structure of a low-pressure casting wheel hub mold according to claim 1, characterized in that: The central angle of the fan-shaped structure of the first side mold unit (1) is 126°, the central angle of the fan-shaped structure of the second side mold unit (2) is 72°, the central angle of the fan-shaped structure of the third side mold unit (3) is 90°, and the central angle of the fan-shaped structure of the fourth side mold unit (4) is 72°.

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