Square end cover casting mold facilitating liquid flowing

Abstract

A square end cover casting mold facilitating liquid flowing comprises a mold body, the mold body comprises a shell, a forming shell is arranged in the shell, and the forming shell is fixed to the upper end of the shell; an opening is formed in the upper end of the shell, a cover plate is arranged at the upper end of the shell, a forming block is arranged at the bottom of the cover plate, a forming cavity is formed between the forming block and the forming shell, and a liquid inlet communicated with the forming cavity is formed in the upper end of the cover plate; a push rod is connected to the bottom of one side of the shell and connected with a reciprocating device which can drive the push rod to move in the length direction of the shell. According to the scheme, the reciprocating device drives the mold body to move in the length direction, so that the molten aluminum generates periodic fluctuation in the forming cavity, the flowing resistance is effectively reduced, the defects of cold shut, insufficient pouring and the like are overcome, rapid filling of the molten aluminum is promoted through dynamic flowing, and the pouring time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, specifically to a square end cap casting mold that facilitates liquid flow. Background Technology

[0002] Aluminum and aluminum alloys, due to their lightweight, corrosion resistance, and high specific strength, are widely used in industrial production. Aluminum casting molds are widely used in the automotive, aerospace, and electronics industries. Typical aluminum parts include structural components, heat dissipation components, and decorative components, and come in various shapes such as square, round, and irregular shapes. Square aluminum parts are commonly used for electronic product housings and battery housings. During casting, molten aluminum is poured into a mold cavity and cooled to form the shape. However, with the increasing demand for lightweighting in industry, higher requirements have been placed on the forming efficiency and quality of aluminum parts. Traditional casting molds usually use static forming methods. Although square aluminum parts are relatively regular, structures like battery housings often have ribs, which requires more grooves or bends in the mold cavity. Static forming relies solely on the gravity of the molten aluminum and the pressure between liquids for flow, which encounters greater resistance, resulting in poor fluidity and reduced forming speed. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a square end cap casting mold that facilitates liquid flow.

[0004] The technical solution of this utility model is as follows:

[0005] A square end cap casting mold that facilitates liquid flow includes a mold body, the mold body including an outer shell, and a molding shell disposed inside the outer shell, the molding shell being fixed to the upper end of the outer shell;

[0006] The upper end of the outer shell is open and is provided with a cover plate. A molding block is provided at the bottom of the cover plate, and a molding cavity is formed between the molding block and the molding shell. A liquid inlet communicating with the molding cavity is provided at the upper end of the cover plate.

[0007] A push rod is connected to the bottom of one side of the outer casing, and the push rod is connected to a reciprocating device. The reciprocating device can drive the push rod to move along the length of the outer casing.

[0008] The reciprocating device is specifically designed as follows: the reciprocating device includes a support base located on one side of the housing, and two supports are provided on the support base, with a reciprocating lead screw rotatably connected between the supports;

[0009] The end of the push rod away from the outer casing is connected to a connecting frame, and the connecting frame is provided with a sliding column that cooperates with the helical groove on the reciprocating lead screw. The end of the reciprocating lead screw away from the outer casing is connected to a drive motor.

[0010] To improve the stability of the movement of the outer casing, two push rods are provided, and the connecting frame is configured as a gantry structure that spans the reciprocating lead screw, with the two push rods located on both sides of the reciprocating lead screw.

[0011] To ensure the stability of the push rods in pushing the housing, the axial distance between the two push rods shall not be less than 1 / 3 of the housing width.

[0012] To ensure the stability of the connecting frame movement, a limit post is installed between the two supports, and the limit post passes through the connecting frame, with the two being slidably connected.

[0013] To protect the outer shell, a limiting shell with an upper opening is provided on the outer side of the outer shell, and the size of the limiting shell is larger than the size of the outer shell. The reciprocating device is located outside the limiting shell, and the push rod passes through the limiting shell and is connected to the outer shell.

[0014] To allow the push rod to move the outer casing more flexibly, movable wheels are installed at the four corners of the bottom of the outer casing, and the movable wheels are set to contact the bottom wall of the limiting shell.

[0015] In order to guide the movement of the outer shell and reduce the torque on the reciprocating device, two limiting plates are provided inside the limiting shell, and the extending direction of the limiting plates is consistent with the moving direction of the outer shell.

[0016] The movable wheel is located between the two limiting plates and is in contact with the limiting plates.

[0017] To ensure more stable positioning of the moving wheel by the limiting plate, the height of the limiting plate shall not be less than 1 / 2 of the radius of the moving wheel.

[0018] The beneficial effects of this utility model are as follows: This utility model is a square end cap casting mold that facilitates liquid flow. Unlike the static forming in the prior art, this solution uses a reciprocating device to drive the mold body to move along the length direction, so that the aluminum liquid generates periodic fluctuations in the forming cavity, effectively reducing flow resistance and avoiding defects such as cold shuts and insufficient pouring. Dynamic flow promotes rapid filling of aluminum liquid and shortens the pouring time. The reciprocating motion of the mold causes micro-disturbance in the aluminum liquid in the cavity, which helps the gas to float up and be discharged naturally, reducing the porosity. The connecting frame with a double push rod and gantry structure, combined with the limiting column, enables the drive motor to drive the outer shell to move back and forth smoothly with the push rod. Attached Figure Description

[0019] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0022] Figure 2 This is a schematic diagram of the internal structure of the outer shell;

[0023] Figure 3 This is a schematic diagram of the internal structure of the molded shell;

[0024] Figure 4 This is a top view of the plan;

[0025] Figure 5 This is a cross-sectional view of the reciprocating device;

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Outer shell; 2. Molded shell; 3. Cover plate; 4. Molded block; 5. Molded cavity; 6. Liquid inlet; 7. Push rod; 8. Reciprocating device; 81. Support base; 82. Support; 83. Reciprocating lead screw; 84. Connecting frame; 85. Spiral groove; 86. Sliding column; 87. Drive motor; 88. Limiting column; 9. Limiting shell; 10. Moving wheel; 11. Limiting plate. Detailed Implementation

[0028] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0029] Example

[0030] As mentioned in the background section, aluminum alloy casting molds are widely used in the production of square structural parts, such as battery casings 1 and other components with rib structures. Traditional molds use a static forming method, relying on the gravity of the molten aluminum and liquid pressure to fill the cavity. When faced with complex mold cavity structures, the liquid flow resistance increases, resulting in a decrease in filling efficiency, making it difficult to meet the requirements of lightweight production for forming speed and quality. The following is a detailed explanation with reference to the illustrations.

[0031] To address the issue of high liquid flow resistance during static molding, this paper considers how to improve liquid flowability through external auxiliary means. Mechanical vibration or displacement can be used to generate inertial forces to assist liquid flow. This embodiment provides a square end cap casting mold that facilitates liquid flow. (See attached image.) Figure 1 The mold body includes a shell 1 and a molding shell 2 is provided inside the shell 1. The molding shell 2 is fixed to the upper end of the shell 1. The molding shell 2 is a fixed structure used to define the shape of the molding cavity 5. Specifically, it can be made of high temperature resistant metal material and fixed inside the shell 1 by welding or bolting.

[0032] Based on the above structure, the upper end of the outer shell 1 is open and a cover plate 3 is provided. The bottom of the cover plate 3 is provided with a forming block 4, and a forming cavity 5 is formed between the forming block 4 and the forming shell 2. The forming block 4 provided at the bottom of the cover plate 3 refers to a protruding structure used to cooperate with the forming shell 2 to form a cavity. Specifically, it can be designed to match the shape of the inner surface of the target casting. The upper end of the cover plate 3 is provided with a liquid inlet 6 that communicates with the forming cavity 5. Generally, there are two liquid inlets 6. One liquid inlet 6 is connected to the liquid supply device, and the other liquid inlet 6 is used for venting. Molten aluminum liquid is injected into the forming cavity 5 through the liquid inlet 6. The gap between the forming block 4 and the forming shell 2 forms the casting outline.

[0033] The main design feature of this solution is that a push rod 7 is connected to the bottom of one side of the outer shell 1, and the push rod 7 is connected to a reciprocating device 8. The reciprocating device 8 can drive the push rod 7 to move along the length direction of the outer shell 1. The reciprocating device 8 is a driving mechanism that can generate periodic linear motion, which drives the push rod 7 to push the outer shell 1 to move along the length direction, so that the mold body generates periodic displacement. The liquid accelerates its flow under the action of inertia, thereby overcoming the flow resistance caused by the complex structure in the mold cavity and improving the filling uniformity.

[0034] Compared to existing technologies, conventional molds rely on the fluid's own flow during static molding, making it difficult to effectively fill mold cavities with grooves or bends. This solution utilizes reciprocating motion to generate dynamic assistance, allowing the fluid to gain additional kinetic energy during filling, significantly reducing flow resistance and avoiding molding defects caused by localized stagnation.

[0035] Specifically, the reciprocating device 8 includes a support base 81 located on one side of the outer casing 1. The support base 81 is a mounting base that supports the reciprocating screw 83 motion mechanism, and two supports 82 are provided on the support base 81. The reciprocating screw 83 is rotatably connected between the supports 82. The reciprocating screw 83 is a transmission rod with a continuous spiral groove 85 on its surface. The trajectory of the spiral groove 85 can realize the automatic reversing motion of the sliding column 86. It is a purchased part, and the model can be selected according to the actual needs. The end of the push rod 7 away from the outer casing 1 is connected to a connecting frame 84, and the connecting frame 84 is provided with a sliding column 86 that cooperates with the spiral groove 85 on the reciprocating screw 83. The end of the reciprocating screw 83 away from the outer casing 1 is connected to a drive motor 87. When the drive motor 87 starts, it will drive the reciprocating screw 83 to rotate around the axis. At this time, the sliding column 86 fixed on the connecting frame 84 is constrained by the trajectory of the spiral groove 85 and generates axial displacement, thereby pushing the connecting frame 84 to reciprocate along the axial direction between the supports 82. Since the connecting frame 84 is rigidly connected to the push rod 7, the reciprocating motion of the push rod 7 can drive the outer shell 1 to vibrate continuously along its length. When this vibration is transmitted to the molten aluminum in the forming cavity 5, it reduces the flow resistance of the molten aluminum in the complex cavity. When the slide column 86 moves to the reversing section of the spiral groove 85, the connecting frame 84 automatically changes its moving direction, realizing uninterrupted continuous reciprocating motion.

[0036] In this embodiment, a limiting shell 9 with an upper opening is provided on the outer side of the outer shell 1, and the size of the limiting shell 9 is larger than the size of the outer shell 1. The limiting shell 9 refers to a fixed shell structure that wraps around the outer shell 1 to avoid frictional interference between the outer shell 1 and the limiting shell 9 when the outer shell 1 moves. The reciprocating device 8 is located outside the limiting shell 9, and the push rod 7 passes through the limiting shell 9 and is connected to the outer shell 1. When the drive motor 87 drives the reciprocating screw 83 to rotate, the sliding column 86 of the connecting frame 84 moves along the trajectory of the spiral groove 85, pushing the push rod 7 to drive the outer shell 1 to perform precise reciprocating movement inside the limiting shell 9.

[0037] In addition, movable wheels 10 are installed at the four corners of the bottom of the outer shell 1, and the movable wheels 10 are in contact with the bottom wall of the limiting shell 9. The movable wheel refers to the rolling component used to support the outer shell 1 and provide the movement function. Specifically, it can be implemented by a metal wheel body covered with rubber, which is connected to the mounting base at the four corners of the bottom of the outer shell 1 through the wheel axle. The contact arrangement between the movable wheel 10 and the bottom wall of the limiting shell 9 refers to the sliding or rolling contact between the rolling surface of the movable wheel 10 and the inner bottom wall of the limiting shell 9. This design, through the rolling contact between the four corner movable wheels 10 and the bottom wall of the limiting shell 9, significantly reduces frictional resistance while maintaining motion accuracy. Furthermore, the symmetrical wheel layout further enhances motion stability. Additionally, the limiting shell 9 contains two limiting plates 11, with the extension direction of the limiting plates 11 aligned with the movement direction of the outer shell 1. The movable wheel 10 is located between the two limiting plates 11 and is in contact with them, thus limiting its lateral displacement. The movable wheel 10 is installed in the area between the limiting plates 11, with its rim in contact with the inner surface of the limiting plates 11. When the reciprocating device 8 drives the outer shell 1 to move, the movable wheel 10 rolls along the extension direction of the limiting plates 11. The limiting plates 11, through physical contact, limit the lateral displacement of the movable wheel 10, thereby ensuring that the outer shell 1 moves only along a preset straight path, avoiding deviation from the motion trajectory.

[0038] Based on the above structure, the height of the limiting plate 11 is not less than 1 / 2 of the radius of the moving wheel 10, and the height of the plate is set to be more than 1 / 2 of the radius of the moving wheel 10, so that the side wall of the limiting plate 11 can cover at least the upper half of the rim of the moving wheel 10, thereby forming a stable lateral limiting when the moving wheel 10 rolls.

[0039] In addition, two push rods 7 are provided, and the connecting frame 84 is set as a gantry structure spanning the reciprocating lead screw 83. The two push rods 7 are located on both sides of the reciprocating lead screw 83. The double push rod 7 structure can balance the force on both sides of the mold body and avoid the deflection problem caused by unilateral force application. The gantry structure refers to the frame that spans above the reciprocating lead screw 83 and is connected to the push rods 7 on both sides. When the drive motor 87 drives the reciprocating lead screw 83 to rotate, the sliding column 86 moves along the trajectory of the spiral groove 85, so that the connecting frame 84 drives the two push rods 7 to move synchronously along the length direction of the outer shell 1. The spanning layout of the gantry structure makes the push rods 7 and the reciprocating lead screw 83 form a stable force transmission path. Through the symmetrical force application of the push rods 7 on both sides, the mold body maintains a straight motion trajectory during movement, avoiding jamming or deviation caused by unilateral force application.

[0040] Furthermore, the axial distance between the two push rods 7 is not less than 1 / 3 of the width of the housing 1. When the push rods 7 are driven by the reciprocating device 8 at the bottom of the housing 1, the lateral force generated by their movement is transmitted to the housing 1. When the axial distance is limited to not less than one-third of the width of the housing 1, the force application areas of the two push rods 7 are symmetrically distributed at the bottom of the housing 1, so that the stress is dispersed to a larger area of ​​the housing 1, thereby reducing the risk of deformation of the housing 1 caused by local stress concentration.

[0041] Based on the above structure, a limiting post 88 is provided between the two supports 82. Its axis is parallel to the direction of movement of the push rod 7, and the limiting post 88 passes through the connecting frame 84. The two are slidably connected to each other and are used to longitudinally constrain the movement trajectory of the connecting frame 84. The sliding connection means that the connecting frame 84 and the limiting post 88 can move relative to each other through a sliding sleeve or linear bearing. Specifically, a sleeve structure with wear-resistant inner lining can be used to achieve this. The inner diameter of the sleeve and the outer diameter of the limiting post 88 form a clearance fit, so that the connecting frame 84 remains stable when moving along the axis of the limiting post 88.

Claims

1. A square end cap casting mold for facilitating liquid flow, comprising a mold body, characterized in that, The mold body includes an outer shell (1), and a molding shell (2) is provided inside the outer shell (1). The molding shell (2) is fixed to the upper end of the outer shell (1). The outer shell (1) has an opening at the top and is provided with a cover plate (3). A molding block (4) is provided at the bottom of the cover plate (3), and a molding cavity (5) is formed between the molding block (4) and the molding shell (2). A liquid inlet (6) communicating with the molding cavity (5) is provided at the top of the cover plate (3). A push rod (7) is connected to the bottom of one side of the outer shell (1), and the push rod (7) is connected to a reciprocating device (8). The reciprocating device (8) can drive the push rod (7) to move along the length direction of the outer shell (1).

2. The square end cap casting mold for facilitating liquid flow according to claim 1, characterized in that, The reciprocating device (8) includes a support base (81) located on one side of the outer shell (1), and two supports (82) are provided on the support base (81), and a reciprocating lead screw (83) is rotatably connected between the supports (82); The push rod (7) is connected to a connecting frame (84) at the end away from the outer casing (1), and the connecting frame (84) is provided with a sliding column (86) that cooperates with the spiral groove (85) on the reciprocating screw (83). The reciprocating screw (83) is connected to a drive motor (87) at the end away from the outer casing (1).

3. The square end cap casting mold for facilitating liquid flow according to claim 2, characterized in that, Two push rods (7) are provided, and the connecting frame (84) is configured as a gantry structure that spans the reciprocating screw (83), with the two push rods (7) located on both sides of the reciprocating screw (83).

4. The square end cap casting mold for facilitating liquid flow according to claim 2, characterized in that, The axial distance between the two push rods (7) is not less than 1 / 3 of the width of the outer casing (1).

5. The square end cap casting mold for facilitating liquid flow according to claim 3, characterized in that, A limiting post (88) is provided between the two supports (82), and the limiting post (88) is provided through the connecting frame (84), and the two are slidably connected.

6. The square end cap casting mold for facilitating liquid flow according to claim 2, characterized in that, The outer side of the outer shell (1) is provided with a limiting shell (9) with an upper opening, and the size of the limiting shell (9) is larger than the size of the outer shell (1). The reciprocating device (8) is located outside the limiting shell (9), and the push rod (7) passes through the limiting shell (9) and is connected to the outer shell (1).

7. The square end cap casting mold for facilitating liquid flow according to claim 6, characterized in that, The outer shell (1) is equipped with movable wheels (10) at the four corners of the bottom, and the movable wheels (10) are in contact with the bottom wall of the limiting shell (9).

8. The square end cap casting mold for facilitating liquid flow according to claim 7, characterized in that, The limiting shell (9) is provided with two limiting plates (11), and the extending direction of the limiting plates (11) is consistent with the moving direction of the shell (1); The movable wheel (10) is located between the two limiting plates (11) and is in contact with the limiting plates (11).

9. The square end cap casting mold for facilitating liquid flow according to claim 8, characterized in that, The height of the limiting plate (11) is not less than 1 / 2 of the radius of the moving wheel (10).

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