A water ring vacuum pump integral casting process

Abstract

The application relates to the technical field of casting, in particular to a water ring type vacuum pump integral casting process. The molding device used in the process comprises sealing covers, extrusion plates, hydraulic cylinders, base plates, sliding blocks, light shafts and light shaft seats. One end of each sand box is connected with a sealing cover, a feeding port is arranged at the top of the sealing cover, the inner wall of the sealing cover is matched with the extrusion plate, the extrusion plate is connected with the output end of the hydraulic cylinder, the hydraulic cylinder is fixed on the two sides of the base plate, the bottom of the sand box is detachably installed on the sliding block, the bottom of the sealing cover is fixedly installed on the sliding block, the sliding block is slidably installed on the light shaft, and the light shaft seats are fixedly installed at the two ends of the light shaft. The mechanical structure can simultaneously mold the internal sand of two sand boxes, and the two sand boxes can be quickly spliced and fixed together after molding, so that the problem of low molding efficiency in the casting process is solved.

Description

Technical Field

[0001] This invention relates to the field of casting technology, specifically to an integral casting process for a water ring vacuum pump. Background Technology

[0002] Casting is one of the earliest metal heat treatment processes mastered by humankind. It refers to the process of melting solid metal into a liquid state and pouring it into a mold of a specific shape, allowing it to solidify and take shape. Currently, sand casting is commonly used when casting water ring vacuum pumps. Sand casting is a casting method that produces castings in sand molds. Steel, iron, and most non-ferrous alloy castings can be obtained using sand casting. Because the molding materials used in sand casting are inexpensive and readily available, and the mold manufacturing is simple, it is suitable for single-piece production, batch production, and mass production of castings, and has always been a fundamental process in casting production.

[0003] In the casting process of water ring vacuum pumps, molding is a key step. Molding methods are divided into manual molding and machine molding. Currently, some smaller factories usually use small molding machines to complete the molding process. However, the current small molding machines can only mold a single sand box at a time. After molding a single sand box, the sand box needs to be manually removed, the mold flipped over, an empty sand box reinstalled, and molding sand filled into it before molding the other side. After the molding process is completed, the two sand boxes need to be manually moved, spliced, and fixed together, which is inefficient.

[0004] To address this, a water ring vacuum pump integral casting process is proposed. Through a molding device, two sand boxes can be used simultaneously to mold the internal molding sand. After the molding process is completed, the two sand boxes can be quickly and labor-savingly spliced ​​and fixed together, improving efficiency and saving manpower. Summary of the Invention

[0005] The purpose of this invention is to provide an integral casting process for a water ring vacuum pump. Through a molding device, the molding sand inside two sand boxes can be molded simultaneously, thereby solving the problem that current molding devices can only mold a single sand box at a time and have low efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A water ring vacuum pump integral casting process according to the present invention, the process comprising the following steps:

[0007] S1: Put the raw sand into the sand mixer, then squeeze, grind and knead the raw sand. After waiting for 3-5 minutes, add the additive and continue to rotate to continuously tumble and mix the raw sand, so that the raw sand and the additive are fully mixed and the additive is evenly and fully coated with the raw sand. After the sand mixer has been working for 6-12 minutes, molding sand is formed. Take out the molding sand from the discharge port.

[0008] S2: The mixed molding sand is put into the feed port of the molding device, and then the molding device is started to compact the molding sand from the left and right sides to form the cavity of the casting. Then, it is assembled and fixed together by manual means to form a mold. After the mold solidifies, it is transported to the pouring port of the melting furnace.

[0009] S3: Pour the molten alloy liquid into the mold. The poured alloy liquid forms a casting through the mold. Wait for the casting to cool naturally to the measured temperature of 200 degrees Celsius. Then remove it and cool it rapidly. After the casting has cooled completely, remove the sand particles from the casting and perform simple processing and polishing. Finally, inspect the quality of the casting to complete the process.

[0010] Preferably, the molding device includes a sand box, a mold, a sealing cover, an extrusion plate, a hydraulic cylinder, a base plate, sliders, optical axes, and optical axis seats. Hydraulic cylinders are fixedly installed on the inner walls of both sides of the base plate. The output ends of the hydraulic cylinders are connected to the extrusion plates, which cooperate with the inner walls of the sealing cover. A feed inlet is provided at the top of the sealing cover. A sand box cooperating with the sealing cover is magnetically connected to the end of the sealing cover away from the hydraulic cylinders. A mold is installed between the two sand boxes, and fixing grooves for cooperating and fixing with the sand boxes are provided on both sides of the mold. The bottom of each sand box is detachably mounted on multiple sliders. The bottom of each sealing cover is fixedly mounted on multiple sliders, and the multiple sliders are simultaneously slidably mounted on multiple optical axes. Optical axis seats are fixedly installed at both ends of each optical axis, and the bottom of the optical axis seats is fixedly mounted on the base plate. The main function of this molding device is to achieve simultaneous molding of two sand boxes, improving work efficiency. First, fix the two sand boxes and the mold, and then fix the sealing cover to the sand boxes, ensuring their airtightness. Then, pour the mixed molding sand into the inlet at the top of the sealing cover until the molding sand is higher than three-quarters of the sand box. Then, start the hydraulic cylinders. The two hydraulic cylinders push the extrusion plates fixedly connected to their output ends to squeeze the molding sand into the middle, compacting it into the two sand boxes. Under the action of the mold, the molding sand in the two sand boxes forms the cavity of the casting. After the process is completed, remove the mold fixed in the middle and observe whether there are any places where the molding sand and the mold are not tightly squeezed. If so, they can be manually repaired. After confirming that there are no problems, the two sand boxes are spliced ​​together to form the mold. Then, remove it to proceed to the next process. The main function of the sealing cover is to provide a space for placing molding sand and ensure that it is sealed and leak-free. During the stamping process, the molding sand will not fall out. Therefore, each time, only the calculated amount of molding sand needs to be added from the inlet of the sealing cover to complete the processing.

[0011] Preferably, a support base is fixedly mounted on the substrate by welding, and the support base has a hole in the middle for supporting the optical axis and allowing the optical axis to pass through. Since the sand box, the molding sand inside, and the sealing cover are heavy, and the optical axis is only fixed by optical axis seats installed at both ends, but the weight is concentrated in the middle of the optical axis, the support base design can simultaneously support the guide rail and the optical axis, preventing uneven stress on the optical axis over a long period from causing deformation, decreased accuracy, or even breakage. A guide rail is fixedly mounted on the top of the support base by a threaded connection, and the mold is slidably mounted on the guide rail. One end of the guide rail is fixed... Equipped with a positioning device to fix the mold in the working position, this mechanical structure is designed so that after the hydraulic cylinder drives the extrusion plate to extrude from the left and right sides, the molding sand in the two sand boxes has formed the cavity of the casting. At this time, the two sand boxes can be manually pulled to move outward a small distance, and then the mold can be manually pushed to the other end of the guide rail. Then the two sand boxes can be spliced ​​and fixed together to form a mold. After that, it can be removed from the molding device and the next processing can be carried out. The design of this structure can quickly remove the mold without manually removing and then manually installing and fixing the mold after each process.

[0012] Preferably, the positioning device includes a positioning block, a magnet one, and a magnet two. The positioning block is fixedly installed at one end of the guide rail by welding. The magnet one is fixedly installed on the positioning block by threaded connection. The magnet two, which cooperates with the magnet one, is fixedly installed on the lower side of the mold by threaded connection. The main function of the positioning device is to enable the mold to be quickly positioned to the designated working position, which facilitates the quick fixation between the sand box and the mold and saves working time. When the molding process of the molding device is completed, the mold is manually pushed to one side via the guide rail. At this time, the two sand boxes that are spliced ​​together to form the casting mold are removed from the slider, and the two empty sand boxes are fixedly installed on the slider. Then, the mold can be manually pushed to the working position via the guide rail. When it is pushed to the end of the guide rail, the limiting block will automatically block the mold so that it cannot continue to slide. Then, the magnet one fixedly installed on the positioning block and the magnet two fixedly installed on the lower side of the mold will magnetically attract each other, fixing the mold to the designated position. At this time, the two empty sand boxes can be manually pushed to contact the mold and combined and fixed through the grooves on the mold. After the combination and fixation are completed, the next process can be carried out.

[0013] Preferably, multiple buckles are fixedly installed on the outer walls of both sand boxes via threaded connections. One sand box has a male buckle fixedly installed, and the other sand box has a female buckle fixedly installed. The two sand boxes are spliced ​​and fixed by the mutual cooperation of the buckles. The side of the mold has a groove for the buckles to cooperate with each other. This structure is designed to quickly splice and fix the two sand boxes. The two sand boxes can be fixedly combined to form a casting when they come into contact. After the hydraulic press is completed, the two sand boxes are manually pulled to move to both sides a certain distance. Then, the mold is manually pushed to move to the other end through the guide rail. At this time, the two sand boxes can be manually pushed to move to the middle at the same time until they come into contact. At the same time, the multiple buckles fixedly installed on the outer walls of the two sand boxes also come into contact and cooperate. The male buckle on one sand box is inserted into the female buckle on the corresponding sand box. After insertion, the fixation is completed. At this time, the two fixed sand boxes can be removed from the slider. The two sand boxes can be separated by pressing the two sides of the male buckle to release the fixation.

[0014] Preferably, multiple spring clips are installed on the top wall of the extrusion plate, and the height of the spring clips exceeds the top wall of the sealing cover. One end of the spring clip is connected to a spring. The top wall of the sealing cover has multiple small holes that cooperate with the spring clips. When the hydraulic cylinder finishes working, the hydraulic cylinder drives the extrusion plate to retract. When the extrusion plate moves on the inner wall of the sealing cover, the spring clip connected to the spring will be squeezed inward by the inner wall of the sealing cover. When the spring clip moves to the position of the small hole on the inner wall of the sealing cover, the spring clip pops out. At this time, the end connected to the spring will extend out of the small hole and hook onto the inner wall of the small hole for fixation. Therefore, the sealing cover will be driven to retract outward at the same time as the output end of the hydraulic cylinder retracts. When the hydraulic cylinder finishes stamping, the sand box and the sealing cover need to be moved to both sides to remove the mold. The function of this structure is that when the output end of the hydraulic cylinder retracts, it simultaneously drives the sealing cover to both ends to retract. When it is necessary to release the fixation, only one end of the spring clip needs to be pressed to release the fixation. In addition, during the next processing, it can be manually pushed and fixed with the sand box for the next processing. This mechanism improves efficiency and saves time.

[0015] Preferably, the substrate has a collection groove below the connection between the sealing cover and the sand box. A collection box is detachably installed in the collection groove. In traditional molding devices, molding sand tends to scatter around the sand box during processing, and the amount of scattering can be excessive. When too much molding sand accumulates at the bottom, it may affect the normal operation of the equipment. However, in this molding device, the molding sand does not scatter around the sand box due to the sealing sleeve. Only after the stamping is completed and the sealing sleeve retracts under the action of the spring buckle to release it from the sand box, a small amount of molding sand may fall at their interface. Therefore, a collection groove is opened at the connection between the substrate sealing cover and the sand box, and a collection box is detachably installed in the groove. After the device has been working for a long time, when the scattered molding sand in the collection box accumulates to a certain extent, the collection box can be removed to reuse the molding sand in the collection box. This mechanism can greatly improve the processing environment and regularly clean the collection box to prevent excessive accumulation of molding sand at the bottom from affecting the normal operation of the equipment.

[0016] Preferably, handles are fixedly installed on both sides of the bottom of the sand box. The function of the handles is to facilitate the removal of the two fixed sand boxes from the protrusions on the base and transfer them to another location for the next process after the molding device is finished and the two sand boxes are fixed together by the mutual cooperation of the buckles. Since the sand boxes are filled with compacted molding sand, their overall weight is relatively large.

[0017] Preferably, a rubber ring is fixedly installed on the side of the extrusion plate by adhesive bonding. The function of the rubber ring is to ensure the sealing between the extrusion plate and the sealing cover when the hydraulic press is performing stamping. This prevents the molding sand from leaking from all four sides of the extrusion plate during the stamping process, thereby ensuring the pressure of the extrusion plate on the molding sand and making it form. At the same time, the rubber ring can also increase the friction between the extrusion plate and the sealing cover. When the molding sand is stamped, the two extrusion plates move towards the middle. At this time, the friction of the rubber ring on the sealing cover causes the sealing cover to generate a force towards a sand box, which can make the sealing cover and the sand box fit more tightly and less prone to gaps, ensuring the normal operation of the device.

[0018] Preferably, the internal cavity volume of the sealing cover is larger than the internal cavity volume of the sand box. When the hydraulic press is pressing the molding sand, the density of the final mold is much higher than that of the molding sand when it is fed into the inlet. Therefore, in order to ensure that the molding sand can be fully compressed at every point during processing, it is necessary to add a slightly larger amount of molding sand than is required to form the mold each time. For this purpose, the internal volume of the sealing cover is set to be larger than the internal volume of the sand box. Before each molding process, a large amount of molding sand is added from the inlet so that the molding sand reaches a sufficient height in the sealed cavity of the sealing cover and the sand box. This ensures that during the pressing process, the molding sand can fill the top of the internal cavity of the sand box through the extrusion plate. And at the end of each pressing, a small amount of molding sand is always left inside the sealing cover to ensure that every part of the sand box is evenly and fully filled and compressed.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Existing molding processes can only mold a single sand box at a time, and the operation steps are cumbersome, requiring constant movement of the sand box and operation of the machine to flip the model. The molding device provided by this invention can simultaneously mold the internal molding sand of two sand boxes, and reduces the operation steps, thereby improving the efficiency of the process.

[0021] 2. In existing molding processes, when completing the molding process of two sand boxes, the sand boxes need to be transported to a designated position in sequence and then manually aligned and assembled together, which is relatively labor-intensive. This invention, through a mechanical structure, can quickly and accurately assemble and fix the two sand boxes together, saving manpower and ensuring assembly accuracy.

[0022] 3. In existing molding processes, molding sand will fall in large quantities around the sand box during processing. When too much molding sand accumulates at the bottom, it may affect the normal operation of the equipment. This invention, through structural design, will only cause a small amount of molding sand to fall at specific locations, and the scattered molding sand can be collected regularly through a collection box to prevent the molding sand from accumulating too much at the bottom and affecting the normal operation of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0024] Figure 2 For the present invention Figure 1 A partial structural diagram of part A in the middle;

[0025] Figure 3 For the present invention Figure 1 A partial structural diagram of part B in the middle section;

[0026] Figure 4 This is a front view of Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure after processing according to Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the merged sandbox in Embodiment 1 of the present invention;

[0029] Figure 7 For the present invention Figure 6 A partial structural diagram of part C in the middle;

[0030] Figure 8 This is a schematic diagram showing the fit between the substrate, guide rail, and collection box in Embodiment 2 of the present invention.

[0031] In the diagram: 1. Sand box; 2. Mold; 3. Sealing cover; 4. Extrusion plate; 5. Hydraulic cylinder; 6. Base plate; 7. Slider; 8. Optical axis; 9. Optical axis seat; 10. Support seat; 11. Guide rail; 12. Positioning block; 13. Magnet one; 14. Magnet two; 15. Buckle; 16. Spring buckle; 17. Collection box; 18. Handle. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figures 1 to 7 This embodiment illustrates the normal operation of the molding device during the molding process, as detailed below:

[0034] A process for integral casting of a water ring vacuum pump includes the following steps:

[0035] S1: Put the raw sand into the sand mixer, then squeeze, grind and knead the raw sand. After waiting for 3-5 minutes, add the additive and continue to rotate to continuously tumble and mix the raw sand, so that the raw sand and the additive are fully mixed and the additive is evenly and fully coated with the raw sand. After the sand mixer has been working for 6-12 minutes, molding sand is formed. Take out the molding sand from the discharge port.

[0036] S2: Two sand boxes 1 are fixed to the two sides of the mold 2 by the grooves opened on both sides of the mold 2. The mixed molding sand is put into the feed port of the molding device. Then the molding device is started to press the molding sand into the two sand boxes 1 from the left and right sides. Under the action of the mold 2, the molding sand in the two sand boxes 1 forms the cavity of the casting. After the mold 2 is removed from the middle, the two sand boxes 1 are quickly spliced ​​and fixed together to form a mold. After the mold solidifies, the mold is transported to the pouring port of the melting furnace.

[0037] S3: Pour the molten alloy liquid into the mold. The poured alloy liquid forms a casting through the mold. Wait for the casting to cool naturally to the measured temperature of 200 degrees Celsius. Then remove it and cool it rapidly. After the casting has cooled completely, remove the sand particles from the casting and perform simple processing and polishing. Finally, inspect the quality of the casting to complete the process.

[0038] The molding device includes a sand box 1, a mold 2, a sealing cover 3, an extrusion plate 4, a hydraulic cylinder 5, a base plate 6, a slider 7, an optical axis 8, and an optical axis seat 9. Hydraulic cylinders 5 are fixedly installed on the inner walls of both sides of the base plate 6. The output ends of the hydraulic cylinders 5 are connected to the extrusion plates 4, which cooperate with the inner walls of the sealing cover 3. The top of the sealing cover 3 has a feed inlet. The end of the sealing cover 3 furthest from the hydraulic cylinders is magnetically connected to a sand box 1 that cooperates with the sealing cover 3. A mold 2 is installed between two sand boxes 1, and the mold 2 has fixing grooves on both sides for cooperating and fixing with the sand boxes 1. The bottom of each sand box 1 is detachably installed on multiple sliders 7. The bottom of each sealing cover 3 is fixedly installed on multiple sliders 7, and the multiple sliders 7 are simultaneously slidably installed on multiple optical axes 8. Optical axis seats 9 are fixedly installed at both ends of each optical axis 8, and the bottom of the optical axis seats 9 is fixedly installed on the base plate 6.

[0039] A support base 10 is fixedly mounted on the substrate 6 by welding. The support base 10 has a hole in its center for supporting the optical axis 8 and allowing it to pass through. A guide rail 11 is fixedly mounted on the top of the support base 10 by threaded connection. The mold 2 is slidably mounted on the guide rail 11. A positioning device for fixing the mold 2 in the working position is fixedly mounted on one end of the guide rail 11. The positioning device includes a positioning block 12, a magnet 13, and a magnet 14. The positioning block 12 is fixedly mounted on one end of the guide rail 11 by welding. A magnet 13 is fixedly mounted on the positioning block 12 by threaded connection. A matching magnet 13 is fixedly mounted on the lower side of the mold 2 by threaded connection. The two sand boxes 1 are connected by multiple snap fasteners 15, each fixed to the outer wall by a threaded connection. One sand box 1 has a male snap fastener, and the other has a female snap fastener. The two sand boxes 1 are joined and fixed together by the interlocking snap fasteners 15. The mold 2 has grooves on its side that mate with the snap fasteners 15. The top wall of the extrusion plate 4 has multiple spring clips 16. The top wall of the sealing cover 3 has multiple small holes that mate with the spring clips 16. Handles 18 are fixedly installed on the bottom sides of both sand boxes 1. Rubber rings are fixedly installed on the sides of the extrusion plate 4. The internal cavity volume of the sealing cover 3 is larger than that of the sand box 1.

[0040] At the start of the operation, the two sand boxes 1 and the mold 2 are first fixed in place. The sealing cover 3 is spliced ​​and fixed to the sand box 1, ensuring their airtightness. Then, the mixed molding sand is poured in through the feed port at the top of the sealing cover 3. The hydraulic cylinders 5 are then activated, and the two hydraulic cylinders 5 push the extrusion plates 4, which are fixedly connected to their output ends, to squeeze towards the center. After the hydraulic cylinders 5 have finished pressing, the molding sand is compacted in the two sand boxes 1. Under the action of the mold 2, the molding sand in the two sand boxes 1 has formed the cavity of the casting. Then, the output end of the hydraulic cylinder 5 retracts, and the extrusion plates 4 move towards both ends on the inner wall of the sealing cover 3. The spring buckle 16 connected to the spring end is squeezed inward by the inner wall of the sealing cover 3. When the spring buckle 16 moves to the position of the small hole on the inner wall of the sealing cover 3, the spring buckle 16 pops out, and the sealing cover 3 is pulled outward along with the retraction of the output end of the hydraulic cylinder 5. At this time, the two sand boxes are pushed to move outward a small distance, and then the mold 2 is pushed to move to the other end of the guide rail 11, while the two sand boxes are pushed towards the center at the same time. Until they come into contact, at the same time, the multiple buckles 15 fixedly installed on the outer walls of the two sand boxes 1 also come into contact and engage. The male buckle on one sand box 1 is inserted into the female buckle on the corresponding other sand box 1. After insertion, the combination and fixation are completed. At this time, the two sand boxes 1 that are spliced ​​together to form a mold are removed from the slider 7 through the handle 18. After pouring out the mold formed by the molding sand, the fixation can be released by pressing the two sides of the male buckle. At this time, the two sand boxes 1 can be separated. Then, the two empty sand boxes 1 are fixedly installed on the slider 7. At this time, the mold 2 is pushed to the working position through the guide rail 11. When it is pushed to the end of the guide rail 11, the limit block will automatically block the mold 2 so that it cannot continue to slide. Then, the magnet 13 fixedly installed on the positioning block 12 and the magnet 24 fixedly installed on the lower side of the mold 2 will magnetically engage, so that the mold 2 is fixed in the designated working position. The two sand boxes are fixed to both sides of the mold 2 again. The sealing cover 3 is spliced ​​and fixed to the sand box 1. The above steps can be repeated.

[0041] Example 2, please refer to Figure 8 This embodiment describes the situation where the collection box 17 is cleaned when too much molding sand accumulates in it, as detailed below:

[0042] The substrate has a collection trough below the connection between the sealing cover 3 and the sand box 1. A collection box 17 is detachably installed in the collection trough. During daily operation, the sealing cover retracts and is released from the sand box 1 under the action of the spring buckle 16. A small amount of molding sand may fall at their interface. The fallen molding sand falls into the collection box 17 in the collection trough. After the device has been running for a long time, the molding sand scattered in the collection box 17 will accumulate to a certain level and rise above the substrate. If it is not cleaned in time, it will cause too much molding sand to accumulate at the bottom and affect the normal operation of the equipment. When the molding sand scattered in the collection box 17 accumulates to a certain level and rises above the substrate, the collection box 17 in the collection trough is manually removed and the molding sand in the collection box 17 is poured back into the sand mixer for reuse to make molding sand for secondary processing, so as to avoid waste.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-piece casting process for a water ring vacuum pump, characterized in that: The process includes the following steps: S1: Raw sand is placed into a sand mixer, then the raw sand is extruded, ground, and kneaded. After waiting for 3-5 minutes, additives are added and the mixture continues to rotate, constantly tumbling and mixing the raw sand to ensure thorough mixing and uniform coating of the raw sand. After the sand mixer has been running for 6-12 minutes, molding sand is formed, which is then removed from the discharge port; S2: The mixed molding sand is placed into the feed inlet of the molding device, and then the molding device is activated to compact the molding sand from both sides to form the cavity of the casting. The casting is then manually assembled and fixed together. The process involves: S1: Forming the mold and waiting for it to solidify before transferring it to the pouring port of the melting furnace; S2: Pouring the molten alloy into the mold, which forms the casting. The casting is then allowed to cool naturally to a measured temperature of 200 degrees Celsius before being rapidly cooled. After cooling, the casting is cleaned of sand particles and then simply machined and polished. Finally, the casting quality is inspected to complete the process. The molding device includes a sand box, mold, sealing cover, extrusion plate, hydraulic cylinder, base plate, slider, optical axis, and optical axis seat. The inner walls on both sides of the base plate are fixedly installed... Equipped with hydraulic cylinders, each cylinder's output end is connected to an extrusion plate. These extrusion plates mate with the inner wall of the sealing cover. A feed inlet is located at the top of the sealing cover. At the end of the sealing cover furthest from the hydraulic cylinder, a sand box is magnetically connected to it, also mates with the sealing cover. A mold is installed between two sand boxes, with fixing grooves on both sides for securing the mold to the sand boxes. Multiple optical axis seats are fixedly mounted on the base plate, and an optical axis is fixedly mounted between two optical axis seats. Multiple sliders slide on the outer surface of the optical axis, and a sand box is detachably mounted on the top of each slider. A sealing plate is fixedly mounted on the top of each slider. The cover has a support base fixedly installed on the substrate, and the support base has a hole in the middle for supporting the optical axis and allowing the optical axis to pass through. A guide rail is fixedly installed on the top of the support base, and the mold is slidably installed on the guide rail. A positioning device for fixing the mold in the working position is fixedly installed at one end of the guide rail. Multiple buckles are fixedly installed on the outer wall of each sand box, and two sand boxes are fixedly spliced ​​together by the buckles. The side of the mold has a groove that cooperates with the buckles. Multiple spring buckles are installed on the top wall of the extrusion plate, and multiple small holes that cooperate with the spring buckles are opened on the top wall of the sealing cover.

2. The integral casting process for a water ring vacuum pump according to claim 1, characterized in that: The positioning device includes a positioning block (12), a magnet one (13) and a magnet two (14). The positioning block (12) is fixedly installed at one end of the guide rail (11). The magnet one (13) is fixedly installed on the positioning block (12). The magnet two (14) that cooperates with the magnet one (13) is fixedly installed on the lower side of the mold (2).

3. The integral casting process for a water ring vacuum pump according to claim 1, characterized in that: The substrate (6) has a collection groove below the connection between the sealing cover (3) and the sand box (1), and a collection box (17) can be detachably installed in the collection groove.

4. The integral casting process for a water ring vacuum pump according to claim 1, characterized in that: Handles (18) are fixedly installed on both sides of the bottom of the sand box (1).

5. The integral casting process for a water ring vacuum pump according to claim 1, characterized in that: A rubber ring is fixedly installed on the side of the extrusion plate (4).

6. The integral casting process for a water ring vacuum pump according to claim 1, characterized in that: The internal cavity volume of the sealing cover (3) is larger than the internal cavity volume of the sand box (1).

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