Low-pressure casting mold for reversely-arranged front-face-upward spin-casting aluminum alloy hub

Abstract

The utility model provides a low-pressure casting mold for a reversely-arranged front-face-upward cast-spin aluminum alloy hub, which comprises a machine table, an upper mold, a lower mold, an upper mold connecting plate, a bottom mold plate, an ejection column, an ejection plate and a pair of side molds, the upper mold is fixedly arranged on the bottom end face of the ejection plate, the ejection column is fixedly arranged on the top end face of the ejection plate, and the lower mold is fixedly arranged on the machine table. The side molds are arranged on the left side and the right side of the ejector plate respectively, the top ends of the side molds are hinged to the ejector plate, kidney-shaped sliding ways are formed in the side molds, pin shafts are fixedly installed on the machine table and extend into the kidney-shaped sliding ways, and the kidney-shaped sliding ways are in sliding connection with the pin shafts; by the adoption of the low-pressure casting mold for the reversely-arranged front-face-upward spin-casting aluminum alloy hub, the front face of a hub casting part is placed upwards in the casting process, the front face is a preferential part where cold cutting and solidification are earliest, the problem that the material performance of the front face part of the aluminum alloy hub is relatively low is solved, the safety of the aluminum alloy hub is improved, and the service life of the aluminum alloy hub is prolonged. And further weight reduction of the hub is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure casting mold technology for automotive aluminum alloy wheel hubs, specifically to a low-pressure casting mold for aluminum alloy wheel hubs with the front side facing upwards. Background Technology

[0002] Wheel hubs are important components connecting tires and axles on vehicles. Based on the manufacturing process, they are classified into integral casting, integral forging, and composite types. Composite wheel hubs consist of two or more pieces: the rim and the spokes. Traditional integral casting wheel hubs are placed face down. The mold consists of an upper mold, side molds, and a lower mold. The part enclosed by the upper and side molds is the rim cavity, and the part enclosed by the upper and lower molds is the spoke cavity. For easy demolding, the upper mold is a frustoconical shape with a thicker top and a thinner bottom. This structure allows for a large contact area between the casting and the upper mold during the casting solidification process, forming a large clamping force. This enables the casting to follow the upper and lower molds in the demolding action of traditional molds, which also leads to the general choice of placing the casting face down.

[0003] Existing pure cast aluminum alloy wheels have rims that are purely cast. Low-pressure casting (including casting-spinning process) has the front facing down. One drawback of this process is that the material properties of the front part of the wheel are relatively low, which is not conducive to further weight reduction of the wheel. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of this utility model is to provide a low-pressure casting mold for aluminum alloy wheel hubs with the front side facing up, so as to solve the problem that the material properties of the front part of the wheel hub are relatively low due to the fact that the casting is done with the front side facing down, making it difficult to reduce the weight of the wheel hub material.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a low-pressure casting mold for an inverted, front-facing aluminum alloy wheel hub, including a machine base, an upper mold, a lower mold, an upper mold connecting plate, and a bottom mold plate. It also includes an ejector column, an ejector plate, and a pair of side molds. The upper mold is fixedly installed on the bottom end face of the ejector plate, and the ejector column is fixedly installed on the top end face of the ejector plate. The pair of side molds are respectively arranged on the left and right sides of the ejector plate, and the top ends of the side molds are hinged to the ejector plate. The side molds have waist-shaped slides. A pin is fixedly installed on the machine base, and the pin extends into the waist-shaped slide. The waist-shaped slide and the pin form a sliding connection. When the ejector plate slides downward or upward, the pair of side molds swing outward away from the center or swing towards the center.

[0007] Furthermore, side mold clamping spring columns are respectively installed at the left and right ends of the upper end face of the bottom template. The side mold clamping spring columns cooperate with the outer surface of the side mold. When the side mold clamping spring columns contact the outer surface of the side mold, the side mold clamping spring columns apply an inward squeezing force to the side mold.

[0008] Furthermore, the side mold clamping spring column includes a cylinder and a spring fitted onto the outer circumferential surface of the cylinder.

[0009] Furthermore, it also includes a pair of side mold closing assist springs, the upper ends of the pair of side mold closing assist springs are symmetrically installed at the bottom end of the ejector plate, and the bottom ends of the pair of side mold closing assist springs are connected to the upper mold connecting plate.

[0010] Furthermore, the upper end face of the upper mold has a cavity, which is filled with thermal insulation cotton.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By adopting the above-mentioned reverse-positioned, face-up casting mold for aluminum alloy wheels, the face of the wheel casting is placed face up during the casting process, which makes the face the first part to be cold-cut and solidified. This solves the problem of relatively low material properties of the face part of the aluminum alloy wheel, improves the safety of the aluminum alloy wheel, and facilitates further weight reduction of the wheel.

[0013] 2. After the casting solidifies, the upper mold and side mold together hold the casting and release it from the lower mold. After being lifted to the ejector plate position, the casting's own weight generates gravity, and the ejector plate pushes the side mold, causing the side mold to swing and loosen. The casting then smoothly detaches from the upper mold and side mold and falls steadily onto the receiving tray of the casting machine. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the reverse-facing, front-facing cast aluminum alloy wheel hub low-pressure casting mold in the combined state in the embodiments of this application.

[0015] Figure 2 This is an exploded view of the installation and assembly structure of the low-pressure casting mold for the reverse-facing aluminum alloy wheel hub in this embodiment of the application.

[0016] Figure 3 This is a schematic diagram illustrating the structural principle of the side mold and the side mold clamping spring column in the embodiments of this application.

[0017] In the picture:

[0018] 100 - Low-pressure casting mold;

[0019] 200-Wheel hub casting;

[0020] 1-Bottom template;

[0021] 2-Lower mold;

[0022] 3-Side mold clamping spring column;

[0023] 4-Upper mold; 41-Cavity;

[0024] 5-Upper mold connecting plate;

[0025] 6-Side mold; 61-Waist-shaped slide;

[0026] 7-Pin;

[0027] 8-Top plate;

[0028] 9-Top column;

[0029] 10-Machinery;

[0030] 11-Insulation cotton;

[0031] 12-Side mold closing assist spring. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] See appendix Figures 1 to 2 As shown, this embodiment provides a low-pressure casting mold 100 for inverted, front-facing aluminum alloy wheel hubs, including a machine base 10, an upper mold 4, a lower mold 2, an upper mold connecting plate 5, a bottom template 1, an ejector pin 9, an ejector plate 8, and a pair of side molds 6. The ejector plate 8 is connected to a drive device on the machine base 10. The ejector pin 9 is installed on the upper end face of the ejector plate 8. The upper mold connecting plate 5 is installed on the bottom end face of the ejector plate 8. The upper mold 4 is fixedly installed on the bottom end face of the upper mold connecting plate 5. The bottom template 1 is provided with... Directly below the lower mold 2, the lower mold 2 is fixedly installed on the upper end face of the bottom template 1. The upper ends of a pair of side molds 6 are symmetrically hinged to the bottom end of the ejector plate 8. The side molds 6 have waist-shaped slides 61. A pin 7 is fixedly installed on the machine base 10. The pin 7 extends into the waist-shaped slide 61, and the waist-shaped slide 61 and the pin 7 form a sliding connection. When the ejector plate 8 slides down or up, the pair of side molds 6 swing outward away from the center or swing towards the center.

[0034] See attached document Figures 1 to 3As shown, in this embodiment, side mold clamping spring pillars 3 are respectively installed at the left and right ends of the upper end face of the bottom mold plate 1. The side mold clamping spring pillars 3 cooperate with the outer surface of the side mold 6. When the side mold clamping spring pillars 3 contact the outer surface of the side mold 6 (i.e., when the upper mold 4 and the lower mold 2 are closed), the side mold clamping spring pillars 3 apply an inward squeezing force to the side mold 6. The setting of the side mold clamping spring pillars 3 can improve the closing force of the four side molds 6 distributed in the front, back, left and right positions, so that the four side molds 6 are drawn together towards the center.

[0035] See attached document Figure 1 and attached Figure 2 As shown, in some embodiments, a pair of side mold closing assist springs 12 are also installed at the bottom end of the ejector plate 8. The upper ends of the pair of side mold closing assist springs 12 are symmetrically installed at the bottom end of the ejector plate 8, and the bottom ends of the pair of side mold closing assist springs 12 are connected to the upper mold connecting plate 5. During demolding, the ejector plate 8 applies a downward force to the side mold closing assist springs 12, pressing the side mold closing assist springs 12. After the casting is separated from the upper mold 4, the pressing side mold closing assist springs 12 assist the side mold 6 to swing back and retract in advance for pre-reset.

[0036] See attached document Figure 1 and attached Figure 2 As shown, the upper end face of the upper mold 4 has a cavity 41, which is filled with thermal insulation cotton 11. By using thermal insulation cotton 11 for thermal insulation, the requirements of sequential solidification process of the casting are ensured.

[0037] See attached document Figure 1 To be continued Figure 3 As shown, in order to better understand the inverted, face-up casting mold for aluminum alloy wheel hubs in this embodiment, its casting principle is explained below:

[0038] During casting, the upper mold 4, lower mold 2, and side mold 6 are closed to form a casting cavity. The casting liquid enters the cavity through the pouring gate. During the casting process, the front of the wheel hub casting 200 is placed facing upwards, making the front the first part to be cooled and solidified. After the casting solidifies, the upper mold 4 and side mold 6 hold the casting together and release it from the lower mold 2. After being lifted to the ejector plate 8, the casting uses its own weight to generate gravity. The ejector plate pushes the side mold 6, causing the side mold 6 to swing and loosen. The casting then smoothly detaches from the upper mold 4 and side mold 6 and falls steadily onto the receiving tray of the casting machine table 10.

[0039] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A low-pressure casting mold for an inverted, face-up aluminum alloy wheel hub, comprising a machine base, an upper mold, a lower mold, an upper mold connecting plate, and a bottom mold plate, characterized in that, It also includes an ejector column, an ejector plate, and a pair of side molds. The upper mold is fixedly installed on the bottom end face of the ejector plate, the ejector column is fixedly installed on the top end face of the ejector plate, and the pair of side molds are respectively arranged on the left and right sides of the ejector plate. The top end of the side mold is hinged to the ejector plate, and the side mold has a waist-shaped slide. A pin is fixedly installed on the machine base, and the pin extends into the waist-shaped slide. The waist-shaped slide and the pin form a sliding connection. When the ejector plate slides downward or upward, the pair of side molds swing outward away from the center or swing towards the center.

2. The low-pressure casting mold for an inverted, front-facing aluminum alloy wheel hub according to claim 1, characterized in that, Side mold clamping spring columns are respectively installed at the left and right ends of the upper end face of the bottom template. The side mold clamping spring columns cooperate with the outer surface of the side mold. When the side mold clamping spring columns contact the outer surface of the side mold, the side mold clamping spring columns apply an inward squeezing force to the side mold.

3. The low-pressure casting mold for an inverted, front-facing aluminum alloy wheel hub according to claim 2, characterized in that, The side mold clamping spring column includes a cylinder and a spring fitted onto the outer circumferential surface of the cylinder.

4. A low-pressure casting mold for an aluminum alloy wheel hub with the reversed front side facing upwards, as described in any one of claims 1 to 3, characterized in that... It also includes a pair of side mold closing assist springs, the upper ends of the pair of side mold closing assist springs are symmetrically installed at the bottom end of the ejector plate, and the bottom ends of the pair of side mold closing assist springs are connected to the upper mold connecting plate.

5. The low-pressure casting mold for an inverted, front-facing aluminum alloy wheel hub according to claim 1, characterized in that, The upper end face of the upper mold has a cavity, which is filled with thermal insulation cotton.

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