Forming mold of sand mold for brake iron ring of electric vehicle

Abstract

The utility model provides a forming die of a sand mould for an electric vehicle brake iron ring, which comprises a die top plate, a die support and a die base which are sequentially arranged from top to bottom, a mounting through hole is arranged at the upper end of the die top plate, a control transverse plate is arranged in the die support, and a die core is arranged at the upper end of the control transverse plate. The mold core is arranged in the mounting through hole in a sliding mode, a supporting cross rod is arranged in the mold support, a mold inner core is arranged in the mold core, the upper end of the mold inner core is flush with the upper end of the mold top plate, the lower end of the mold inner core abuts against the supporting cross rod, and a transmission mechanism is arranged in the mold support. The input end of the transmission mechanism extends out of the side portion of the die support, and the output end of the transmission mechanism is connected with the lower end of the control transverse plate. As the mold core is separated from the sand box before the sand box is manually lifted by a worker, the inner wall of the cavity in the sand box is not easy to deform and can be kept in a relatively smooth and flat state in the process of manually lifting the sand box by the worker.

Description

Technical Field

[0001] This utility model relates to molding dies, and in particular, to a sand mold for molding electric vehicle brake rims. Background Technology

[0002] Currently, the production process of electric vehicle brake rims using sand casting involves six steps: First, a sand box is placed above a fixed mold, allowing a core from the mold, whose shape matches the brake rim, to extend into the sand box. Second, molding sand is filled into the sand box. Third, the molding sand is extruded using a molding press, creating a cavity within the sand box that conforms to the shape of the brake rim. Fourth, the sand box is manually lifted by a worker. Fifth, molten iron is poured into the cavity to obtain a rough brake rim blank. Sixth, the brake rim is machined using a machine tool to obtain the finished product. However, during the manual lifting of the sand box, it is prone to wobbling, and the core from the fixed mold compresses the cavity, causing numerous indentations on the inner wall of the cavity. This results in a large number of burrs on the finished brake rim blank, thus affecting the production cost of the electric vehicle brake rim. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a molding die for a sand mold used for electric vehicle brake rings, which is less likely to compress the inner wall of the cavity in the sand box during the separation process.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a molding die for a sand mold of an electric vehicle brake rim, comprising a mold top plate, a mold support, and a mold base arranged sequentially from top to bottom. The upper end of the mold top plate has an installation through hole. A control cross plate is provided in the mold support, and a mold core is provided at the upper end of the control cross plate. The mold core is slidably disposed in the installation through hole, and the outer wall of the mold core is in contact with the inner wall of the installation through hole. A support crossbar is provided in the mold support, and the support crossbar is located at the control cross hole. Below the horizontal plate, and with the supporting horizontal bar and the mounting through hole vertically opposite each other, a mold inner core is provided in the mold core. The outer wall of the mold inner core fits against the inner wall of the mold core. The upper end of the mold inner core is flush with the upper end of the mold top plate. The lower end of the mold inner core abuts against the supporting horizontal bar. A transmission mechanism is provided in the mold support. The input end of the transmission mechanism extends from the side of the mold support. The output end of the transmission mechanism is connected to the lower end of the control horizontal plate to drive the control horizontal plate to slide up and down vertically.

[0005] The above technical solution, when manufacturing sand molds for electric vehicle brake rims, involves the following steps: First, placing the sand box on top of the mold's top plate. Second, using an external power source or manual labor, a transmission mechanism drives the control plate and mold core upwards, allowing the upper end of the mold core to extend into the sand box. Third, filling the sand box with molding sand. Fourth, using a molding press to extrude the molding sand, creating a cavity in the sand box that matches the shape of the electric vehicle brake rim. Fifth, using an external power source or manual labor, a transmission mechanism drives the control plate and mold core downwards, aligning the upper end of the mold core with the upper end of the mold's top plate. Sixth, the worker manually lifts the sand box. The installation through-hole, in conjunction with the transmission mechanism, can limit and guide the movement of the mold core, ensuring that the inner wall of the cavity in the sand box is not easily compressed during the separation of the mold core from the sand box, resulting in a smoother and flatter surface. Because the mold core has already separated from the sand box before the worker manually lifts it, the inner wall of the cavity in the sand box is less likely to deform during the manual lifting process, maintaining a relatively smooth and flat state. Therefore, when using the aforementioned sand mold for electric vehicle brake rims to produce them, the resulting brake rim blanks are smoother and flatter, minimizing raw material waste and reducing production costs to some extent.

[0006] Preferably, the transmission mechanism includes a control lever, a transmission gear, and a transmission rack. The control lever is rotatably connected to the mold support, and the rotation axis of the control lever is horizontal. The transmission gear is fixedly disposed at the end of the control lever that extends into the mold support. The upper end of the transmission rack is fixedly disposed at the lower end of the control plate, and the lower end of the transmission rack extends vertically downward and meshes with the transmission gear.

[0007] With the above technical solution, when in use, the control lever is driven to rotate circumferentially around the rotation axis by an external power source or manually. The control lever will drive the transmission gear to rotate synchronously, the transmission gear will drive the transmission rack to slide up and down, and the transmission rack will drive the control plate and the mold core to move synchronously.

[0008] Preferably, a rotating seat is fixedly mounted on the mold support, and the control lever is rotatably connected to the rotating seat via a bearing.

[0009] The above technical solution allows the control lever to be rotatably connected to the mold support via bearings and a rotating seat, offering advantages such as easy assembly and high connection stability.

[0010] Preferably, a limiting rocker arm is rotatably provided in the mold support. The rotation axis of the limiting rocker arm is vertical. When the upper end of the limiting rocker arm abuts against the lower end of the transmission rack, the upper end of the mold core protrudes from the upper end of the mold top plate.

[0011] With the above technical solution, when the mold core moves to the designated position, the limiting rocker arm is moved to the lower part of the transmission rack, so that the upper end of the limiting rocker arm abuts against the lower end of the transmission rack. At this time, the limiting rocker arm can be used to limit the mold core.

[0012] Preferably, the lower end of the transmission rack is threaded with an adjusting bolt, and the lower end of the adjusting bolt is used to abut against the upper end of the limiting rocker arm.

[0013] By changing the engagement length between the adjusting bolt and the transmission rack, the above technical solution can be used to process electric vehicle brake rims of different heights, thereby improving the applicability of the above molding die.

[0014] Preferably, the control plate is threaded with a positioning bolt, the upper end of which is used to abut against the lower end of the mold top plate.

[0015] Through the above technical solution, the positioning bolt can be used to control the upward movement of the control plate, making the use of the above forming mold more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0017] Reference numerals in the attached drawings: 1. Mold top plate; 2. Mold support; 3. Mold base; 4. Mounting through hole; 5. Control plate; 6. Mold core; 7. Support crossbar; 8. Mold inner core; 9. Transmission mechanism; 91. Control lever; 92. Transmission gear; 93. Transmission rack; 10. Rotating seat; 11. Limit rocker arm; 12. Adjusting bolt; 13. Positioning bolt. Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0019] A sand-molded mold for electric vehicle brake rims, such as... Figure 1 As shown, it includes a mold top plate 1, a mold support 2, and a mold base 3 arranged sequentially from top to bottom.

[0020] The upper end of the mold top plate 1 is provided with a mounting through hole 4, which extends vertically and has a diameter equal to the outer diameter of the electric vehicle brake rim. In this embodiment, there are four mounting through holes 4, which are evenly spaced.

[0021] A control plate 5 is provided in the mold support 2, and the control plate 5 is horizontally positioned. A mold core 6 is provided at the upper end of the control plate 5, opposite to the mounting through hole 4. The mold core 6 is slidably positioned in the mounting through hole 4, and the outer wall of the mold core 6 is in contact with the inner wall of the mounting through hole 4. The inner diameter of the mold core 6 is equal to the inner diameter of the electric vehicle brake ring. A support crossbar 7 is provided in the mold support 2, and the support crossbar 7 is horizontally positioned and located below the control plate 5. In this embodiment, there are two support crossbars 7, which are vertically opposite to two sets of mounting through holes 4 respectively. A mold inner core 8 is provided in the mold core 6. The outer wall of the mold inner core 8 is in contact with the inner wall of the mold core 6. The upper end of the mold inner core 8 is flush with the upper end of the mold top plate 1, and the lower end of the mold inner core 8 abuts against the support crossbar 7. The mold support 2 is equipped with a transmission mechanism 9. The input end of the transmission mechanism 9 extends from the side of the mold support 2, and the output end of the transmission mechanism 9 is connected to the lower end of the control plate 5 to drive the control plate 5 to slide up and down in the vertical direction.

[0022] The transmission mechanism 9 includes a control lever 91, a transmission gear 92, and a transmission rack 93. A rotating seat 10 is fixedly mounted on the mold support 2. The control lever 91 is rotatably connected to the rotating seat 10 via a bearing, and the rotation axis of the control lever 91 is horizontal. In this embodiment, the control crossbar is L-shaped, and the bent section is located on the outside of the mold support 2 for manual operation by the worker. The transmission gear 92 is fixedly mounted at the end of the control lever 91 that extends into the mold support 2. The upper end of the transmission rack 93 is fixedly mounted at the lower end of the control crossbar 5, and the lower end of the transmission rack 93 extends vertically downward and meshes with the transmission gear 92.

[0023] A limiting rocker arm 11 is rotatably mounted in the mold support 2. The rotation axis of the limiting rocker arm 11 is vertical. When the upper end of the limiting rocker arm 11 abuts against the lower end of the transmission rack 93, the upper end of the mold core 6 protrudes from the upper end of the mold top plate 1. An adjusting bolt 12 is threadedly connected to the lower end of the transmission rack 93. The lower end of the adjusting bolt 12 abuts against the upper end of the limiting rocker arm 11.

[0024] The control plate 5 is threaded with a positioning bolt 13, the upper end of which is used to abut against the lower end of the mold top plate 1.

[0025] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A sand mold for forming electric vehicle brake rims, characterized in that: The mold assembly includes a mold top plate (1), a mold support (2), and a mold base (3) arranged sequentially from top to bottom. The mold top plate (1) has an installation through hole (4) at its upper end. The mold support (2) contains a control cross plate (5), and a mold core (6) is located at the upper end of the control cross plate (5). The mold core (6) is slidably disposed in the installation through hole (4), and the outer wall of the mold core (6) is in contact with the inner wall of the installation through hole (4). The mold support (2) contains a support cross bar (7), which is located below the control cross plate (5) and is aligned with the installation through hole (3). Holes (4) are opposite each other. A mold core (8) is provided in the mold core (6). The outer wall of the mold core (8) is in contact with the inner wall of the mold core (6). The upper end of the mold core (8) is flush with the upper end of the mold top plate (1). The lower end of the mold core (8) abuts against the support crossbar (7). A transmission mechanism (9) is provided in the mold bracket (2). The input end of the transmission mechanism (9) extends from the side of the mold bracket (2). The output end of the transmission mechanism (9) is connected to the lower end of the control crossbar (5) to drive the control crossbar (5) to slide up and down in the vertical direction.

2. The molding die for a sand mold used for electric vehicle brake rims according to claim 1, characterized in that: The transmission mechanism (9) includes a control lever (91), a transmission gear (92), and a transmission rack (93). The control lever (91) is rotatably connected to the mold support (2), and the rotation axis of the control lever (91) is horizontal. The transmission gear (92) is fixedly disposed at the end of the control lever (91) that extends into the mold support (2). The upper end of the transmission rack (93) is fixedly disposed at the lower end of the control plate (5), and the lower end of the transmission rack (93) extends vertically downward and meshes with the transmission gear (92).

3. The molding die for a sand mold used for electric vehicle brake rims according to claim 2, characterized in that: A rotating seat (10) is fixedly installed on the mold support (2), and the control lever (91) is rotatably connected to the rotating seat (10) through a bearing.

4. The molding die for a sand mold used for electric vehicle brake rims according to claim 2, characterized in that: A limiting rocker arm (11) is rotatably provided in the mold support (2). The rotation axis of the limiting rocker arm (11) is vertical. When the upper end of the limiting rocker arm (11) abuts against the lower end of the transmission rack (93), the upper end of the mold core (6) protrudes from the upper end of the mold top plate (1).

5. The molding die for a sand mold used for electric vehicle brake rims according to claim 4, characterized in that: The lower end of the transmission rack (93) is threaded with an adjusting bolt (12), the lower end of which is used to abut against the upper end of the limiting rocker arm (11).

6. The molding die for a sand mold used for electric vehicle brake rims according to claim 5, characterized in that: The control plate (5) is threaded with a positioning bolt (13), the upper end of which is used to abut against the lower end of the mold top plate (1).

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