A battery cast welding machine
Patent Information
- Application Number
- CN202522298204.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0003]如现有的电池铸焊机，电池外壳放置在铸焊模具内部进行加工时，电池外壳的尺寸一定，相对于铸焊模具的深度存在差距，不便于调节铸焊模具的内部放置深度，从而不便于稳定准确的放置电池外壳进行加工，而且电池外壳加工完成后，也便于快速取出，而且，电池外壳的铸焊模具内部加工过程中，会产生灰尘残渣，粘附在电池外壳的内部，影响电池外壳的外观和铸焊模具的整洁，不便于对电池外壳加工生产的灰尘残渣进行抽吸清理，因此制作一种能够准确放置和取出电池外壳且抽吸清理灰尘残渣的电池铸焊机很有必要
1、安装框通过支撑柱安装在底座上，而铸焊模具通过搭接板和安装柱可拆卸安装在安装框的内部顶端，便于拆卸安装和更换维护铸焊模具。
Smart Images
Figure CN224794643U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and more specifically, to a battery casting and welding machine. Background Technology
[0002] A casting-welding machine, also known as a fully automatic battery casting-welding machine, is a small-scale valve-regulated sealed lead-acid battery casting and welding equipment. The complete set of equipment includes fixtures, molds, a furnace, a cooling device, and a demolding and battery casing insertion device. Electric bicycle lead-acid batteries consist of important components such as a plastic casing (generally made of ABS or PP material), electrode groups (composed of positive and negative plates, busbars, and separators), and busbars. The electrode tabs and busbars are formed by casting and welding. The electrode tabs are also connected to the busbars at the top, while there are no busbars at the bottom. When the battery is in use, current flows through the positive terminal connector and then through the negative terminal connector to obtain the current.
[0003] In existing battery casting and welding machines, the battery casing is placed inside the casting and welding mold for processing. Since the size of the battery casing is fixed, there is a gap between the casing's dimensions and the mold's depth. This makes it difficult to adjust the internal depth of the mold, hindering stable and accurate placement of the battery casing for processing. Furthermore, it makes it difficult to quickly remove the battery casing after processing. During the processing, dust and residue are generated inside the mold, adhering to the inside of the battery casing and affecting its appearance and the cleanliness of the mold. It is also difficult to effectively remove and extract this dust and residue. Therefore, it is essential to develop a battery casting and welding machine that can accurately place and remove the battery casing and effectively remove dust and residue. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides a solution that overcomes or at least partially solves the above technical problems.
[0005] This utility model provides a battery casting and welding machine, including a base, a support leg fixed at the bottom end of the base, a support column fixed at the four corners of the top end of the base, an installation frame fixed at the top end of the support column, a casting and welding mold installed inside the top end of the installation frame, a lifting mechanism installed at the bottom end of the casting and welding mold, and a dust extraction mechanism installed at the four corners of the top end of the casting and welding mold. The lifting mechanism includes a lifting plate slidably installed inside the bottom of the mounting frame, a lifting column fixed to the top of the lifting plate, a lifting hole opened at the bottom of the casting mold for the lifting column to slide through, and a first electric push rod fixedly installed at the top of the base for pushing the lifting plate to move up and down.
[0006] In a preferred embodiment, the base is horizontally positioned, the support column is vertically positioned, the mounting frame is a rectangular frame structure and is vertically positioned, the first electric push rod is vertically positioned, and the lifting plate is a rectangular plate structure and is horizontally positioned.
[0007] In a preferred embodiment, the lifting column is vertically arranged, the casting and welding mold is a rectangular structure and is horizontally arranged, and an overlapping plate is fixed in the middle of the side of its top end, the overlapping plate being horizontally overlapped with the top end of the mounting frame.
[0008] In a preferred embodiment, a mounting post is fixed to the middle of the side of the top of the mounting frame. The mounting post is a threaded post structure and is vertically arranged. The outer end of the overlapping plate has a mounting hole. The mounting post slides through the mounting hole, and a nut is connected to its surface at the top of the mounting hole.
[0009] In a preferred embodiment, the suction dust removal mechanism includes a first air guide pipe slidably installed at the four corners inside the mounting frame and fixed at the four corners of the lifting plate, a suction pipe rotatably connected to the top of the first air guide pipe for suctioning dust and residue during the casting and welding of the battery casing, an air guide frame fixedly connected to the bottom end of the first air guide pipe, a filter box installed and connected directly below the air guide frame for filtering and intercepting dust and residue, and a suction pump installed and connected to the outer end of the filter box.
[0010] In a preferred embodiment, guide grooves are formed at the four internal corners of the mounting frame. The guide grooves are circular and vertically arranged. The first air guide tube is a circular tube structure that slides vertically through the guide grooves. The top of the first air guide tube has an internal threaded surface. The bottom outer surface of the suction tube has an external threaded surface structure and is spirally inserted and connected to the top of the first air guide tube. A retaining ring is fixed at the bottom of the suction tube and at the top of the first air guide tube. The suction tube adopts a telescopic tube structure, and its outer suction end is located above the casting and welding mold.
[0011] In a preferred embodiment, the air guide frame has a cross-shaped structure and is horizontally positioned at the bottom of the lifting plate. Its interior is hollow and connected to the bottom of the first air guide pipe. A second air guide pipe connects the middle of the bottom of the air guide frame to the middle of the top of the filter box. A filter screen for filtering dust and residue is installed inside the filter box. A third air guide pipe connects the suction pump to the filter box. The suction pump is fixedly installed on one side of the top of the base.
[0012] In a preferred embodiment, support plates are fixed at both ends of the top of the base and at positions outside the mounting frame. A top plate is fixed at the top of the support plates. A second electric push rod is installed at the middle of the top of the top plate. A pressure plate is fixed at the bottom of the second electric push rod. Guide holes are opened at the top of the top plate and at positions on both sides of the second electric push rod. Guide rods that slide through the guide holes are fixed at both ends of the top of the pressure plate. The pressure plate is located directly above the casting and welding mold.
[0013] In a preferred embodiment, the lower surface of the overlapping plate is tightly fitted to the top surface of the mounting frame, and the length of the overlapping plate is not less than 1 / 3 of the side width of the mounting frame. The overlapping plate is pressed against the top of the mounting frame by the locking force of the mounting column and the nut, thereby fixing the mold in the horizontal direction.
[0014] Furthermore, the outer diameter of the lifting column is smaller than the inner diameter of the lifting hole, and the two are in clearance fit; the top edge of the lifting hole is rounded, and the hole wall of the lifting hole is pasted with a high-temperature resistant sealing strip, which not only prevents the lifting column from getting stuck when it is raised and lowered, but also prevents welding residue from entering the installation frame.
[0015] Furthermore, the air guide frame is fixed to the center of the bottom end of the lifting plate by bolts, the top surface of the air guide frame is in contact with the bottom surface of the lifting plate, and the cross intersection of the air guide frame coincides with the central axis of the lifting plate; the bottom end of the first air guide pipe vertically penetrates the lifting plate and connects to the four ends of the air guide frame, and the connection is sealed by welding to ensure that there is no leakage of airflow.
[0016] Furthermore, the filter box is fixed to the top center of the base by a bracket, the bracket is welded to the base, and the bottom of the filter box is connected to the top of the bracket by bolts; the central axis of the filter box coincides with the central axis of the air guide frame, ensuring that the second air guide pipe is vertical and reducing airflow resistance.
[0017] Furthermore, the suction tube is a metal corrugated tube structure that can extend and retract axially. Its outer suction end is equipped with a flat suction nozzle (the width of which is flush with the side of the casting and welding mold). The vertical distance between the suction nozzle and the top of the casting and welding mold can be adjusted by extension and retraction. The suction nozzles of the four suction tubes point to the four corners of the casting and welding mold respectively, forming a 360° suction range without dead angles.
[0018] Furthermore, the horizontal projection dimension of the pressure plate is consistent with the top surface dimension of the casting and welding mold, and a high-temperature resistant silicone pad is attached to the bottom end of the pressure plate; when the second electric push rod is in the retracted state, the distance between the bottom end of the pressure plate and the top end of the casting and welding mold is 50-100mm; the guide rod and the guide hole are clearance fit to ensure that the pressure plate is accurately aligned with the casting and welding mold when it is raised and lowered.
[0019] Furthermore, the filter box is equipped with a coarse filter (1mm aperture) and a fine filter (0.1mm aperture) installed from top to bottom, both of which are made of metal and are detachable; the bottom of the filter box is equipped with a drawer-type dust collection box, which is connected to the filter box by a buckle, making it easy to clean the collected dust and residue regularly; the connection port of the third air guide pipe to the filter box is located below the fine filter, ensuring that the airflow enters the suction pump after double filtration.
[0020] Furthermore, the bottom end of the first air guide pipe is rigidly connected to the four corners of the lifting plate (welded or bolted). When the first electric push rod drives the lifting plate to rise and fall along the inner wall of the mounting frame, the first air guide pipe slides vertically along the guide groove simultaneously. The lifting stroke of the lifting plate is matched with the length of the first air guide pipe, ensuring that the suction pipe is always located above the casting and welding mold.
[0021] Furthermore, the number of lifting columns is 4-8 (adapted to the size of the casting and welding mold), distributed in a rectangular array at the top of the lifting plate, and the spacing between adjacent lifting columns corresponds to the support point position at the bottom of the battery casing; the top of the lifting column has a hemispherical structure to avoid scratches when the battery casing is ejected.
[0022] The targeted solution provided by this utility model has the following beneficial effects: 1. The mounting frame is mounted on the base via support columns, while the casting and welding mold is detachably mounted on the top of the mounting frame via overlapping plates and mounting columns, facilitating disassembly, installation, replacement, and maintenance of the casting and welding mold.
[0023] 2. A lifting plate is slidably installed inside the mounting frame, and a first electric push rod is installed at the bottom of the lifting plate to drive the lifting plate to move up and down. A lifting column is evenly fixed at the top of the lifting plate, and the lifting column slides through the bottom of the casting mold. Therefore, according to the size of the battery casing, the first electric push rod drives the lifting plate and the lifting column to move up and down, adjusting the size of the top of the lifting column inside the casting mold, thereby adjusting the placement depth inside the casting mold. This facilitates accurate and stable placement of the battery casing inside the casting mold for processing. After the battery casing is processed, the first electric push rod drives the lifting plate and the lifting column upwards, using the lifting column to push the battery casing out of the casting mold, thus facilitating quick removal of the battery casing.
[0024] 3. The first air guide pipe is slidably installed in the guide grooves at the four corners inside the mounting frame. The first air guide pipe is located at the four corners of the casting and welding mold. Therefore, the suction pipe can be rotatably installed on the top of the first air guide pipe, and the hollow air guide frame is fixed at the bottom of the four first air guide pipes. Therefore, during the processing of the battery casing inside the casting and welding mold, the suction pump draws air from inside the filter box through the third air guide pipe, and draws air from the top of the casting and welding mold through the second air guide pipe, the air guide frame, the first air guide pipe and the suction pipe, thereby forming a negative pressure at the outer end of the suction pipe, which in turn draws the dust and residue generated during the processing of the top of the battery casing, making it easy to clean quickly and avoiding dust and residue from contaminating the appearance of the battery casing. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 This is an overall perspective view provided by an embodiment of the present utility model; Figure 2 A schematic diagram of the installation frame and its internal lifting plate and lifting column provided for the embodiment of this utility model; Figure 3 A schematic diagram of the installation frame and its internal first air guide pipe and air guide frame provided for an embodiment of the present utility model; Figure 4 A schematic diagram of the casting and welding mold and the overlapping plate provided for the embodiment of this utility model; Figure 5 A schematic diagram of the suction tube structure provided for an embodiment of this utility model.
[0027] In the diagram: 1. Base; 2. Support leg; 3. Support column; 4. Suction pump; 5. Mounting frame; 6. Support plate; 7. First air guide pipe; 8. Casting and welding mold; 9. Overlap plate; 10. Suction pipe; 11. Lifting column; 12. Lifting plate; 13. Nut; 14. Mounting column; 15. Pressure plate; 16. Guide rod; 17. Guide hole; 18. Second electric push rod; 19. Top plate; 20. Retaining ring; 21. Guide groove; 22. Filter box; 23. Third air guide pipe; 24. Second air guide pipe; 25. Air guide frame; 26. First electric push rod; 27. Lifting hole; 28. Mounting hole. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example
[0029] Reference Figure 1-5 This utility model provides a technical solution: a battery casting and welding machine, including a base 1, a support leg 2 fixed at the bottom end of the base 1, a support column 3 fixed at the four corners of the top end of the base 1, an installation frame 5 fixed at the top end of the support column 3, a casting and welding mold 8 installed inside the top end of the installation frame 5, a lifting mechanism installed at the bottom end of the casting and welding mold 8, and a dust removal mechanism installed at the four corners of the top end of the casting and welding mold 8.
[0030] In a preferred embodiment, support plates 6 are fixed at both ends of the top of the base 1 and at positions outside the mounting frame 5. A top plate 19 is fixed at the top of the support plate 6. A second electric push rod 18 is installed at the middle of the top of the top of the top plate 19. A pressure plate 15 is fixed at the bottom of the second electric push rod 18. Guide holes 17 are opened at the top of the top of the top plate 19 and at positions on both sides of the second electric push rod 18. Guide rods 16 that slide through the guide holes 17 are fixed at both ends of the top of the pressure plate 15. The pressure plate 15 is located directly above the casting and welding mold 8.
[0031] The lifting mechanism includes a lifting plate 12 slidably installed inside the bottom of the mounting frame 5, a lifting column 11 fixed to the top of the lifting plate 12, a lifting hole 27 opened at the bottom of the casting and welding mold 8 for the lifting column 11 to slide through, and a first electric push rod 26 fixedly installed at the top of the base 1 for lifting the lifting plate 12 to move up and down.
[0032] In a preferred embodiment, the base 1 is horizontally positioned, the support column 3 is vertically positioned, the mounting frame 5 is a rectangular frame structure and is vertically positioned, the first electric push rod 26 is vertically positioned, and the lifting plate 12 is a rectangular plate structure and is horizontally positioned.
[0033] According to the size of the battery casing, the first electric push rod 26 drives the lifting plate 12 and the lifting column 11 to move up and down, adjusts the size of the top of the lifting column 11 inside the casting and welding mold 8, thereby adjusting the placement depth inside the casting and welding mold 8, so that the battery casing can be accurately and stably placed inside the casting and welding mold 8 for processing.
[0034] In a preferred embodiment, the lifting column 11 is vertically arranged, the casting and welding mold 8 is a rectangular structure and is horizontally arranged, and an overlapping plate 9 is fixed in the middle of the side of its top end. The overlapping plate 9 is horizontally overlapped with the top end of the mounting frame 5.
[0035] In a preferred embodiment, a mounting post 14 is fixed in the middle of the side of the top of the mounting frame 5. The mounting post 14 is a threaded post structure and is set vertically. The outer end of the overlapping plate 9 has a mounting hole 28. The mounting post 14 slides through the mounting hole 28, and a nut 13 is connected to its surface at the top of the mounting hole 28.
[0036] The casting and welding mold 8 is detachably installed inside the top of the mounting frame 5 via the lap plate 9 and the mounting column 14, which facilitates the disassembly, installation, replacement and maintenance of the casting and welding mold 8.
[0037] In a preferred embodiment, the suction dust removal mechanism includes a first air guide pipe 7 slidably installed at the four corners inside the mounting frame 5 and fixed at the four corners of the lifting plate 12, a suction pipe 10 rotatably connected to the top of the first air guide pipe 7 for suctioning dust and residue during the casting and welding of the battery casing, an air guide frame 25 fixedly connected to the bottom end of the first air guide pipe 7, a filter box 22 installed and connected directly below the air guide frame 25 for filtering and intercepting dust and residue, and a suction pump 4 installed and connected to the outer end of the filter box 22.
[0038] In a preferred embodiment, guide grooves 21 are provided at the four corners of the mounting frame 5. The guide grooves 21 are circular and vertically arranged. The first air guide tube 7 is a circular tube structure and slides vertically through the guide grooves 21. The top of the first air guide tube 7 has an internal threaded surface structure. The bottom outer surface of the suction tube 10 has an external threaded surface structure and is spirally inserted and connected to the top of the first air guide tube 7. A retaining ring 20 is fixed at the bottom of the surface of the suction tube 10 and at the top of the first air guide tube 7. The suction tube 10 adopts a telescopic tube structure, and its outer suction end is located above the casting and welding mold 8.
[0039] In a preferred embodiment, the air guide frame 25 has a cross-shaped structure and is horizontally positioned at the bottom of the lifting plate 12. Its interior is hollow and connected to the bottom of the first air guide pipe 7. A second air guide pipe 24 connects the middle of the bottom of the air guide frame 25 with the middle of the top of the filter box 22. A filter screen for filtering dust and residue is installed inside the filter box 22. A third air guide pipe 23 connects the suction pump 4 to the filter box 22. The suction pump 4 is fixedly installed on one side of the top of the base 1.
[0040] During the processing of the battery casing inside the casting and welding mold 8, the suction pump 4 draws air from inside the filter box 22 through the third air guide pipe 23, and draws air from the top of the casting and welding mold 8 through the second air guide pipe 24, the air guide frame 25, the first air guide pipe 7 and the suction pipe 10, thereby creating a negative pressure at the outer end of the suction pipe 10, which in turn draws dust and residue generated during the processing from the top of the battery casing, and filters and intercepts it through the filter box 22, making it easy to quickly clean the top of the casting and welding mold 8 and avoid dust and residue contaminating the appearance of the battery casing.
[0041] In use, the mounting frame 5 is mounted on the base 1 via the support column 3, while the casting and welding mold 8 is detachably mounted on the top of the inside of the mounting frame 5 via the overlapping plate 9 and the mounting column 14, which facilitates the disassembly, installation, replacement and maintenance of the casting and welding mold 8.
[0042] A lifting plate 12 is slidably installed inside the mounting frame 5, and a first electric push rod 26 is installed at the bottom end of the lifting plate 12 to drive the lifting plate 12 to move up and down. Moreover, a lifting column 11 is evenly fixed at the top end of the lifting plate 12, and the lifting column 11 slides through the bottom end of the casting and welding mold 8.
[0043] Therefore, based on the size of the battery casing, the first electric push rod 26 drives the lifting plate 12 and the lifting column 11 to move up and down, adjusting the size of the top of the lifting column 11 inside the casting and welding mold 8, thereby adjusting the placement depth inside the casting and welding mold 8, so that the battery casing can be accurately and stably placed inside the casting and welding mold 8 for processing.
[0044] Moreover, after the battery casing is processed, the first electric push rod 26 drives the lifting plate 12 and the lifting column 11 to move upward, and the lifting column 11 pushes the battery casing out of the casting and welding mold 8, so as to facilitate the quick removal of the battery casing.
[0045] The first air guide tube 7 is slidably installed in the guide groove 21 at the four corners inside the mounting frame 5. The first air guide tube 7 is located at the four corners of the casting and welding mold 8. Therefore, the suction tube 10 can be rotatably installed at the top of the first air guide tube 7, and the hollow air guide frame 25 is fixed at the bottom of the four first air guide tubes 7.
[0046] Therefore, during the processing of the battery casing inside the casting and welding mold 8, the suction pump 4 draws air from inside the filter box 22 through the third air guide pipe 23, and draws air from the top of the casting and welding mold 8 through the second air guide pipe 24, the air guide frame 25, the first air guide pipe 7 and the suction pipe 10, thereby creating a negative pressure at the outer end of the suction pipe 10, which in turn draws dust and residue generated during the processing of the top of the battery casing, and filters and intercepts it through the filter box 22, making it easy to quickly clean the top of the casting and welding mold 8 and avoid dust and residue contaminating the appearance of the battery casing.
[0047] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A battery casting and welding machine, comprising a base (1), characterized in that: The base (1) is fixed with a support leg (2) at the bottom end, and a support column (3) is fixed at the four corners of the top end of the base (1). The support column (3) is fixed with an installation frame (5) at the top end. The installation frame (5) is installed with a casting and welding mold (8) at the top end. The casting and welding mold (8) is installed with a lifting mechanism at the bottom end. The casting and welding mold (8) is installed with a dust extraction mechanism at the four corners of the top end. The lifting mechanism includes a lifting plate (12) slidably installed inside the bottom of the mounting frame (5), a lifting column (11) fixed to the top of the lifting plate (12), a lifting hole (27) opened at the bottom of the casting and welding mold (8) for the lifting column (11) to slide through, and a first electric push rod (26) fixedly installed at the top of the base (1) for lifting the lifting plate (12) to move up and down.
2. The battery casting and welding machine according to claim 1, characterized in that: The base (1) is horizontally set, the support column (3) is vertically set, the mounting frame (5) is a rectangular frame structure and is vertically set, the first electric push rod (26) is vertically set, and the lifting plate (12) is a rectangular plate structure and is horizontally set.
3. The battery casting and welding machine according to claim 1, characterized in that: The lifting column (11) is set vertically, the casting and welding mold (8) is a rectangular structure and is set horizontally, and an overlapping plate (9) is fixed in the middle of the side of its top end. The overlapping plate (9) is horizontally overlapped with the top end of the mounting frame (5).
4. A battery casting and welding machine according to claim 3, characterized in that: A mounting post (14) is fixed in the middle of the side of the top of the mounting frame (5). The mounting post (14) is a threaded post structure and is set vertically. The outer end of the lap plate (9) has a mounting hole (28). The mounting post (14) slides through the mounting hole (28), and a nut (13) is connected to its surface at the top of the mounting hole (28).
5. A battery casting and welding machine according to claim 1, characterized in that: The dust extraction mechanism includes a first air pipe (7) slidably installed at the four corners inside the mounting frame (5) and fixed at the four corners of the lifting plate (12), a suction pipe (10) rotatably connected to the top of the first air pipe (7) for extracting dust and residue during the casting and welding of the battery casing, an air guide frame (25) fixedly connected to the bottom end of the first air pipe (7), a filter box (22) installed and connected directly below the air guide frame (25) for filtering and intercepting dust and residue, and a suction pump (4) installed and connected to the outer end of the filter box (22).
6. A battery casting and welding machine according to claim 5, characterized in that: The mounting frame (5) has guide grooves (21) at its four internal corners. The guide grooves (21) are circular and vertically arranged. The first air guide tube (7) is a circular tube and slides vertically through the guide grooves (21). The top of the first air guide tube (7) is an internal threaded surface. The bottom outer surface of the suction tube (10) is an external threaded surface and is spirally inserted and connected to the top of the first air guide tube (7). A retaining ring (20) is fixed at the bottom of the surface of the suction tube (10) and at the top of the first air guide tube (7). The suction tube (10) adopts a telescopic tube structure, and its outer suction end is located above the casting and welding mold (8).
7. A battery casting and welding machine according to claim 5, characterized in that: The air guide frame (25) has a cross-shaped structure and is horizontally set at the bottom of the lifting plate (12). Its interior is hollow and connected to the bottom of the first air guide pipe (7). A second air guide pipe (24) is connected between the middle of the bottom of the air guide frame (25) and the middle of the top of the filter box (22). A filter screen for filtering dust and residue is installed inside the filter box (22). A third air guide pipe (23) is connected between the suction pump (4) and the filter box (22). The suction pump (4) is fixedly installed on one side of the top of the base (1).
8. A battery casting and welding machine according to claim 1, characterized in that: Support plates (6) are fixed at both ends of the top of the base (1) and at the position outside the mounting frame (5). A top plate (19) is fixed at the top of the support plate (6). A second electric push rod (18) is installed in the middle of the top of the top of the top plate (19). A pressure plate (15) is fixed at the bottom of the second electric push rod (18). Guide holes (17) are opened at the top of the top of the top plate (19) and at the position on both sides of the second electric push rod (18). Guide rods (16) that slide through the guide holes (17) are fixed at both ends of the top of the pressure plate (15). The pressure plate (15) is located directly above the casting and welding mold (8).