Lead-acid battery cast-welded non-runner mold

Abstract

The application discloses a lead-acid battery cast-welding non-water gap mold, which comprises a main mold cavity, a ejector pin demolding device arranged below the main mold cavity, left and right lead channels arranged on the left and right sides of the main mold cavity respectively, and a pouring water gap connected to each of the left and right lead channels, a busbar cavity is arranged on the main mold cavity, the pouring water gap is arranged at a position corresponding to the busbar cavity, and the application further comprises a cutting device connected to the left and right lead channels to drive the left and right lead channels to move horizontally in the front-back direction. The cutting device is arranged to separate the pouring water gap from the busbar cavity, so that no water gap remains after the busbar is cooled, the cutting device returns after the busbar is cooled and formed, the pouring water gap is connected to the busbar cavity, and the pouring water gap and the busbar cavity are circulated in sequence during the cast-welding process. The application effectively prevents lead from remaining in the busbar water gap of the cast-welding mold after cast-welding and cooling, and reduces the amount of liquid lead.

Description

A lead-acid battery casting and welding mold without sprue Technical Field

[0001] This invention relates to the field of battery manufacturing, and more particularly to a lead-acid battery casting and welding mold without sprue. Background Technology

[0002] Lead-acid batteries (VRLA) are rechargeable batteries whose electrodes are mainly made of lead and its oxides, and whose electrolyte is a sulfuric acid solution. They are widely used in the battery industry due to their high resource utilization rate, voltage stability, and relatively low cost.

[0003] Currently, many traditional casting molds for lead-acid batteries have the problem of lead residue remaining in the manifold and drain ports after casting and cooling during the casting and welding process. On the one hand, this leads to a large amount of lead waste at the gates, and on the other hand, lead falling off from the manifold and drain ports inside the battery can puncture the separator, causing a short circuit in the battery.

[0004] Existing design methods for reducing water inlets generally lack stability and sustainability. To this day, the water inlet and outlet remain one of the limiting factors in the casting and welding process of lead-acid batteries. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention aims to provide a lead-acid battery casting and welding mold without a sprue, thereby solving the problem of lead residue remaining at the drain outlet after casting and cooling during the casting and welding process. The specific technical solution is as follows:

[0006] A lead-acid battery casting and welding mold without gates includes a main mold cavity, an ejector pin demolding device disposed below the main mold cavity, a left lead channel and a right lead channel respectively disposed on the left and right sides of the main mold cavity, each of the left and right lead channels being connected to a casting gate, a manifold cavity being formed on the main mold cavity, the casting gate being disposed at a position corresponding to the manifold cavity, and a cutting device connected to the left and right lead channels to drive them to move horizontally in the front-back direction.

[0007] The beneficial effects of this invention are as follows: By incorporating a cutting device, the translational movement of the cutting device causes the casting gate to detach from the manifold cavity, thus ensuring that no gate remains after the manifold cools. After the manifold is cold-formed, the cutting device returns, allowing the casting gate to connect and fit snugly with the manifold cavity, and this cycle repeats sequentially during the casting and welding process. This invention effectively prevents the problem of lead residue remaining at the manifold gate after the casting and welding mold cools, while also reducing the amount of liquid lead used, thus saving costs.

[0008] Furthermore, the cutting device includes a translation device and a connecting rod, the lower part of which is connected to the translation device, and the upper part is integrally or fixedly connected to the left or right guide rail.

[0009] By setting up connecting rods, the space where the demolding device is located is avoided, and a translation device can be set below the demolding device, thereby improving the overall space utilization.

[0010] Furthermore, a connector is fixedly connected to the upper part of the connecting rod, and the connector is simultaneously fixed to the left lead track and the right lead track.

[0011] By setting up connecting parts, the translation device can simultaneously drive the left and right vertical tracks to translate via connecting rods, saving costs and space.

[0012] Furthermore: the ejector pin demolding device is installed on the horizontal base plate below, and a vertical mounting plate is integrally provided below the base plate, and the translation device is installed on the mounting plate.

[0013] By setting a vertical mounting plate under the base plate for mounting the translation device, the entire device is made more compact and saves space.

[0014] Furthermore, the connecting rod is provided with an anti-collision part for abutting against the side of the base plate.

[0015] Although the position and translation distance of the translation device can be calculated and set, errors may occur during long-term use. Since the translation device is located below the base plate, the connecting rod may collide with the side of the base plate. Once a collision occurs, it will affect the service life of the connecting rod and the accuracy of the translation device's movement.

[0016] Furthermore, the translation device is a pneumatic cylinder, a hydraulic cylinder, or a screw motor.

[0017] The above-mentioned commonly used displacement mechanisms are simple and practical.

[0018] Furthermore, at least two brackets are provided below the left and right lead tracks, and a sliding groove is opened on the top of the brackets, in which the left and right lead tracks slide.

[0019] By setting chutes below the left and right lead channels, the chutes restrict the movement direction of the left and right lead channels, thus ensuring that the left and right lead channels always move horizontally on the set track. After resetting, the casting nozzle and the manifold cavity are exactly matched, ensuring smooth flow of molten lead.

[0020] Furthermore, a clearance groove is provided at the bottom of the chute, and the length of the clearance groove in the left-right direction is less than the width of the bottom of the left or right lead track.

[0021] By creating clearance grooves at the bottom of the chute, the friction between the bottom of the chute and the bottom of the left and right lead tracks is effectively reduced, making the translation smoother.

[0022] Furthermore, a discharge hole is provided at the bottom of the air-proof groove.

[0023] Dust and impurities generated during the left and right lead conveyor movement can be discharged from the discharge hole and will not accumulate in the clearance trough.

[0024] Furthermore, the casting nozzle is inclined, with the end connected to the left or right lead channel being wider and higher, and the end connected to the manifold cavity being narrower and lower.

[0025] The casting nozzle acts like a funnel, ensuring that the molten lead in the left and right lead channels flows smoothly into the confluence mold cavity. Its inclined design further ensures the smooth flow of the molten lead.

[0026] Furthermore, heating devices are provided on the main mold cavity, the left lead track, and the right lead track.

[0027] To ensure the required temperature for casting and welding, and since the positive and negative manifolds differ, the main mold cavity, left lead channel, and right lead channel are each equipped with independent heating devices to ensure that the temperature of the lead molten metal pouring port is around 480-490 degrees Celsius. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a planar schematic diagram of the present invention from a top view;

[0030] Figure 3 is a schematic diagram of the bracket structure.

[0031] In the diagram, 1. Main mold cavity; 11. Manifold cavity; 2. Ejector pin demolding device; 21. Base plate; 22. Mounting plate; 3. Left lead runner; 4. Right lead runner; 5. Casting gate; 7. Translation device; 8. Connecting rod; 81. Anti-collision part; 82. Connecting part; 9. Bracket; 91. Slide groove; 911. Clearance groove; 912. Discharge hole; 10. Heating device. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] As shown in Figures 1 and 2, a lead-acid battery casting and welding mold without sprue includes a main mold cavity 1, an ejector pin demolding device 2 disposed below the main mold cavity 1, a left lead channel 3 and a right lead channel 4 disposed on the left and right sides of the main mold cavity 1 respectively, and a casting gate 5 connected to the left lead channel 3 and the right lead channel 4. A manifold cavity 11 is formed on the main mold cavity 1.

[0035] First, the molten lead is divided into two by a lead pump, entering the left lead channel 3 and the right lead channel 4 respectively. Each of the left and right lead channels 3 and 4 is equipped with an independent electric heating element to ensure the molten lead reaches the appropriate temperature during casting. The molten lead in the left and right lead channels 3 and 4 flows into the manifold cavity 11 through the casting nozzle 5. The casting nozzle 5 is higher and wider on the side closest to the left and right lead channels, and correspondingly lower and narrower on the other side, serving a guiding function. Generally, the narrower end of the casting nozzle 5 faces the manifold cavity 11, and the casting nozzle 5 functions similarly to a funnel.

[0036] After the molten lead enters the manifold cavity through the casting nozzle 5, the translation device 7 moves horizontally, thereby driving the left lead channel 3 and the right lead channel 4 to move horizontally in the front-back direction. This causes the casting nozzle 5 to be misaligned with the manifold cavity 11, ensuring that there is no nozzle residue in the solidified manifold after cooling and forming. After the manifold is cooled and formed, the cutting device returns horizontally, so that the casting nozzle 5 and the manifold cavity 11 are connected and fit together, and the process is repeated sequentially during the casting and welding process.

[0037] In this embodiment, the translation device 7 is a cylinder, which is located below the ejector pin demolding device 2. Its piston rod is fixed to the connecting member 82 via a connecting rod 8 to simultaneously drive the left lead track 3 and the right lead track 4 to translate. The connecting rod 8 is vertically arranged, and an anti-collision part is provided on the side adjacent to the base plate 21 used to install the ejector pin demolding device 2 to reinforce the connecting rod 8 and prevent collisions from affecting its service life or translation accuracy. A vertical mounting plate 22 is integrally provided below the base plate 21 for mounting the cylinder.

[0038] As shown in Figures 1 and 3, at least two brackets 9 are provided below both the left lead channel 3 and the right lead channel 4. A groove 91 is formed at the top of each bracket 9, allowing the left lead channel 3 and the right lead channel 4 to slide within the groove 91. The groove 91 precisely limits the translation of the left and right lead channels, ensuring the distance between the casting nozzle 5 and the manifold cavity 11. Furthermore, certain requirements are placed on the straightness and thermal expansion coefficient of the left lead channel 3 and the right lead channel 4, ensuring that the gap between the changed cavity and the cutting strip after relative movement is less than 0.01 mm, preventing lead molten metal from overflowing.

[0039] The bottom of the slide 91 has a clearance groove 911. The length of the clearance groove 911 in the left-right direction is less than the width of the bottom of the left lead track 3 or the right lead track 4, so that the left and right lead tracks are suspended on the clearance groove 911, reducing the friction of movement.

[0040] Since dust, debris and other residues are inevitably generated when the left and right lead tracks slide in the chute 91, and these residues accumulate in the clearance trough 911 for a long time, they can affect the sliding of the left and right lead tracks. Therefore, one or more discharge holes 912 are provided at the bottom of the clearance trough 911 to allow the residues to fall off automatically and ensure the smooth sliding of the left and right lead tracks.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A lead-acid battery casting and welding mold without sprue, comprising a main mold cavity (1), an ejector pin demolding device (2) disposed below the main mold cavity (1), a left lead channel (3) and a right lead channel (4) respectively disposed on the left and right sides of the main mold cavity (1), wherein a casting gate (5) is connected to both the left lead channel (3) and the right lead channel (4), and a manifold cavity (11) is provided on the main mold cavity (1), characterized in that: The casting nozzle (5) is positioned corresponding to the manifold cavity (11), and also includes a cutting device. The cutting device is connected to the left lead channel (3) and the right lead channel (4) to drive them to move horizontally in the front-back direction. The cutting device includes a translation device (7) and a connecting rod (8). The lower part of the connecting rod (8) is connected to the translation device (7), and the upper part is integrally or fixedly connected to the left lead channel (3) or the right lead channel (4).

2. The lead-acid battery casting and welding mold without sprue as described in claim 1, characterized in that: The upper part of the connecting rod (8) is fixedly connected to a connector (82), which is simultaneously fixed to the left guide rail (3) and the right guide rail (4).

3. The lead-acid battery casting and welding mold without sprue as described in claim 1, characterized in that: The ejector pin demolding device (2) is installed on the horizontal base plate (21) below, and a vertical mounting plate (22) is integrally provided below the base plate (21). The translation device (7) is installed on the mounting plate (22).

4. The lead-acid battery casting and welding mold without sprue as described in claim 3, characterized in that: The connecting rod (8) is provided with a collision protection part (81) for abutting against the side of the base plate (21).

5. The lead-acid battery casting and welding mold without sprue as described in any one of claims 2-4, characterized in that: The translation device (7) is a cylinder, a hydraulic cylinder, or a screw motor.

6. The lead-acid battery casting and welding mold without sprue as described in claim 1, characterized in that: At least two brackets (9) are provided below the left lead rail (3) and the right lead rail (4), and a sliding groove (91) is opened on the top of the bracket (9), and the left lead rail (3) and the right lead rail (4) slide in the sliding groove (91).

7. The lead-acid battery casting and welding mold without sprue as described in claim 6, characterized in that: The bottom of the slide (91) is provided with a clearance groove (911), and the length of the clearance groove (911) in the left and right directions is less than the width of the bottom of the left lead track (3) or the right lead track (4).

8. The lead-acid battery casting and welding mold without sprue as described in claim 1, characterized in that: The casting nozzle (5) is inclined, with the end that connects to the left lead channel (3) or the right lead channel (4) being wider and higher, and the end that connects to the manifold cavity (11) being narrower and lower.

9. The lead-acid battery casting and welding mold without sprue as described in any one of claims 1-4 and 6-8, characterized in that: Heating devices (10) are provided on the main mold cavity (1), the left lead rail (3) and the right lead rail (4).

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