Manufacturing method of plastic magnetic drive pump with high-integration structure

Abstract

The invention discloses a manufacturing method of a plastic magnetic drive pump with a high-integration structure, and relates to the technical field of magnetic drive pumps, and the manufacturing method comprises the following steps: step 1, hot-melt plastic particles wrap parts, so that a rear cover assembly is subjected to integral injection molding; 2, an impeller front cover plate and an impeller inner magnetic chamber belt blade are manufactured in an integrated injection molding mode, an impeller rotor blank is formed, and a final impeller rotor assembly is obtained; thirdly, relevant parts are put into a mold to be subjected to integral injection molding to form a volute body; fourthly, a rear cover and a volute sealing ring are installed on the rear cover assembly and matched with the volute assembly to form a pump head part; and fifthly, the pump head, the driving chamber and the motor are connected, and the impeller is driven to work through inner and outer magnetic assemblies. Pump head parts are manufactured in an integrated injection molding mode, the structure is simple, the integration degree of plastic parts and silicon carbide parts is greatly improved, and the risk that the silicon carbide parts fall off and are damaged due to deformation of high-temperature materials in the operation process of a pump under extreme working conditions is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic pumps, and in particular to a method for manufacturing a highly integrated structural plastic magnetic pump. Background Art

[0002] Plastic magnetic pumps are suitable for conveying chemical media such as acid, alkali or non-solid mixed solutions at different temperatures. Plastic magnetic pumps are mainly composed of three parts: pump head, magnetic transmission and motor. The components of the pump head include inlet and outlet flanges, pump housing, silicon carbide ring, silicon carbide bearing, silicon carbide shaft, impeller rotor and back cover; the magnetic transmission consists of an external magnetic rotor, an internal magnetic rotor and a non-magnetic back cover; when the motor drives the external magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, drive the impeller rotor containing the internal magnet to rotate synchronously, realize contactless transmission of power, and convert the dynamic seal into a static seal.

[0003] In the production process of existing material magnetic pumps, the pump head has many and complicated parts, the production process of existing pumps is cumbersome, and the structure is not optimized enough. It has a great impact on the production cost and production efficiency of enterprises. After the pump head is injection molded, there are many factors that affect the deformation. After the plastic parts are deformed, it is difficult to control the mechanical dimensional accuracy, especially with silicon carbide mating surfaces. For different customer site actual working conditions and special applications, such as temperature rise, frequent start and stop, small flow operation, etc., it is easy to cause serious quality problems.

[0004] With the changes in the market environment and the increasing demand of customers for reducing energy consumption, the working efficiency of existing plastic pumps can hardly meet all the needs of customers. Summary of the invention

[0005] The object of the present invention is to provide a method for manufacturing a highly integrated structural plastic magnetic pump to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a highly integrated structural plastic magnetic pump, comprising the following steps:

[0007] Step 1: Making the rear cover assembly: Put the shaft and other parts into the injection mold, and wrap the parts with hot-melt plastic particles to make the rear cover assembly integrally injection-molded;

[0008] Step 2: Impeller rotor assembly production: The inner magnetic base, inner magnetic magnet, silicon carbide sleeve and other parts are placed in the injection mold, and the impeller front cover and the impeller inner magnetic chamber with blades are produced by one-piece injection molding to form an impeller rotor blank, which is machined to obtain the final impeller rotor assembly;

[0009] Step 3: Making the volute assembly: Put the relevant parts into the mold for integral molding and injection molding to form the volute body, then machine the volute body to obtain the volute body of the final size, connect the flange to the volute body, and then connect the drain bolts and the drain sealing ring to the volute body to form the volute assembly;

[0010] Step 4: Assemble the pump head part; the external magnetic cast iron base, the external magnetic magnet, the external magnetic sealing ring and the external magnetic sealing cover constitute the external magnetic assembly, the external magnetic assembly is connected to the motor, the drive chamber is connected to the motor, the motor base is connected to the existing equipment, the rear cover assembly is matched with the silicon carbide sleeve, and the rear cover and the volute sealing ring are installed on the rear cover assembly, and matched with the volute assembly to form the pump head part;

[0011] Step 5: Connect the pump head, drive chamber, and motor, and drive the impeller through the internal and external magnetic components.

[0012] Preferably, in the step 2, when manufacturing the impeller rotor body, the silicon carbide sleeve is placed in the mold, the sleeve is positioned by a bracket in the mold, the magnet and the inner magnetic base are assembled and connected, and after dynamic balancing, the magnet is placed in the mold, and the inner magnetic base is positioned by a plurality of holes reserved by machining the end surface of the inner magnetic base, and then the hot-melt plastic particles are wrapped around the corresponding parts to form the impeller inner magnetic chamber with blades;

[0013] Then the impeller front cover assembly is made. The impeller silicon carbide ring is placed in the mold, the inner hole and end face of the impeller silicon carbide ring are fixed with a bracket, the impeller front cover is injection molded and the wheel silicon carbide ring is wrapped to form the impeller front cover assembly, and then the impeller front cover assembly is hot-melt welded with the impeller rotor body and the impeller rotor rear cover to form an impeller rotor blank, and the final impeller rotor assembly is obtained after machining.

[0014] Preferably, in the step 2, when making the impeller rotor body, firstly, the silicon carbide sleeve is inserted into the assembly hole of the inner magnetic magnet and the inner magnetic base glued together, and when the pin hole on the outer surface of the silicon carbide sleeve corresponds to the pin hole reserved on the inner magnetic base, a plurality of pins are used to fix the assembly of the silicon carbide sleeve, the inner magnetic base and the inner magnetic magnet, and the parts are placed in a mold, a support is used to pass through the inner hole of the silicon carbide sleeve, and the end face of the silicon carbide sleeve is fixed, and hot-melt particles are injection molded into an impeller inner magnetic chamber with blades to obtain the impeller rotor body;

[0015] The injection-molded impeller front cover plate is then hot-melt welded to the impeller rotor body to form an impeller rotor blank, which is then machined to obtain a final impeller rotor assembly.

[0016] Preferably, in step three, when making the volute body, the volute silicon carbide ring is first placed in the mold, the inner hole and end face of the silicon carbide ring are positioned by a bracket, and the volute silicon carbide ring is wrapped with an integrally-molded plastic volute to form a preliminary volute body, which is then machined to obtain a volute body of final size.

[0017] Preferably, in step three, when making the volute body, the silicon carbide bearing is first placed in the mold, the inner hole and end face of the silicon carbide bearing are positioned by a bracket, and the silicon carbide bearing is wrapped with an injection-molded one-piece volute with an outlet fixing flange to form a preliminary volute body, which is then machined to obtain a volute body of final size.

[0018] Preferably, after obtaining the volute body of the final size in the step three, the outlet movable flange and the inlet movable flange are respectively put on the outlet and inlet of the volute body, and the outlet flange sealing ring and the inlet flange sealing ring are respectively installed in the sealing grooves of the outlet flange adapter and the inlet flange adapter, and connected to the volute body by threads, and finally the drain outlet bolts and the drain outlet sealing ring are connected to the volute body by threads to form a volute assembly.

[0019] Preferably, after obtaining the volute body of the final size in step three, the inlet flange and the volute body are hot-melt welded, and finally the drain outlet bolts and the drain outlet sealing ring are connected to the volute body through threads to form a volute assembly.

[0020] Preferably, the rear cover assembly and the silicon carbide sleeve in step four are matched by matching the silicon carbide shaft in the rear cover assembly with the silicon carbide sleeve hole in the impeller rotor assembly.

[0021] Preferably, the rear cover assembly and the silicon carbide sleeve in step four are matched by matching the silicon carbide shaft in the rear cover assembly with the silicon carbide sleeve hole in the impeller rotor assembly and the silicon carbide bearing in the volute assembly.

[0022] Preferably, in step 4, the external magnetic assembly is connected to the motor via a set screw and a flat key, and then the drive chamber, the motor and the motor base are connected via a bolt group.

[0023] Technical effects and advantages of the present invention:

[0024] (1) The present invention manufactures pump head components by integrated injection molding, which has a simple structure, improves the reliability of pump head components, can reduce the mechanical processing of key dimensions after injection molding, and greatly improves the integration of plastic parts and silicon carbide parts, so as to avoid the risk of silicon carbide parts falling off and being damaged due to deformation of high-temperature materials during operation of the pump under extreme working conditions, reduce the quality problems of the pump, and improve the efficiency of the pump;

[0025] (2) The present invention reduces production and assembly processes, improves production efficiency, and reduces enterprise costs through an integrated injection molding process. The design of the pump head components reduces machining instability, reduces cumulative errors, improves the accuracy of part dimensions, and improves the working efficiency of the magnetic pump.

[0026] (3) The present invention facilitates high integration of the structure through the assembly of the rear cover assembly, the impeller rotor assembly and the volute assembly, making it convenient to replace and assemble, reducing the use of seals, and preventing inlet and outlet leakage through hot-melt welding between parts, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall side structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the front structure of the first embodiment of the present invention.

[0029] Figure 3 It is a front cross-sectional structural schematic diagram of Embodiment 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of the inlet flange sealing ring of Example 1 of the present invention.

[0031] Figure 5 It is a schematic diagram of the front structure of the second embodiment of the present invention.

[0032] Figure 6 It is a schematic diagram of the front cross-sectional structure of the second embodiment of the present invention.

[0033] Figure 7 This is a schematic cross-sectional view of the positioning pin according to the second embodiment of the present invention.

[0034] In the figure: 1. Motor; 2. Drive room;

[0035] 301, plastic back cover; 302, silicon carbide shaft; 303, silicon carbide bearing;

[0036] 401, inner magnetic base; 402, inner magnetic magnet; 403, impeller inner magnetic chamber with blades; 404, silicon carbide sleeve; 405, impeller front cover; 4061, impeller silicon carbide ring; 4062, impeller rotor rear cover; 407, positioning pin;

[0037] 501, drain outlet bolt; 502, drain outlet sealing ring; 5031, volute silicon carbide ring; 5032, plastic volute; 5033, outlet movable flange; 5034, outlet flange adapter; 5035, inlet flange adapter; 5036, inlet movable flange; 5037, outlet flange sealing ring; 5038, inlet flange sealing ring; 5041, volute with outlet fixed flange; 5042, inlet flange;

[0038] 601, external magnetic cast iron base; 602, external magnetic magnet; 603, external magnetic sealing ring; 604, external magnetic sealing cover;

[0039] 7. Set screw; 8. Flat key; 901. Bolt assembly; 902. Motor base; 903. Bolt protection cover; 10. Rear cover and volute sealing ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The present invention provides Figure 1-7 A method for manufacturing a highly integrated structural plastic magnetic pump is shown, comprising:

[0042] Step 1: Making the rear cover assembly: insert the silicon carbide shaft 302 into the hole of the silicon carbide bearing 303, put them together into the injection mold, and wrap the silicon carbide parts with hot-melt plastic particles to form them into one piece;

[0043] Step 2: manufacturing the impeller rotor assembly; manufacturing the impeller rotor blank through the inner magnetic base 401, the inner magnetic magnet 402, the impeller inner magnetic chamber with blades 403, the silicon carbide sleeve 404 and the impeller front cover 405, and obtaining the final impeller rotor assembly through machining;

[0044] Step 3: Making a volute assembly: forming a volute body by one-piece injection molding, and then machining the volute body to obtain a volute body of a final size, connecting the flange to the volute body, and then connecting the drain port bolt 501 and the drain port sealing ring 502 to the volute body through threads to form a volute assembly;

[0045] Step 4: The pump head part is formed; the external magnetic cast iron base 601, the external magnetic magnet 602, the external magnetic sealing ring 603 and the external magnetic sealing cover 604 constitute an external magnetic assembly, the external magnetic assembly is connected to the motor 1 through the set screws 7 and the flat key 8, and then the drive chamber 2 is connected to the motor 1 and the motor base 902 through the bolt group 901, the rear cover assembly is matched with the silicon carbide sleeve 404 hole, the rear cover and the volute sealing ring 10 are sleeved on the outer ring of the rear cover assembly, and matched with the inner hole of the volute assembly to form the pump head part;

[0046] Step 5: The bolt group 901 connects the pump head and the driving chamber 2, and the bolt protection cover 903 is put on the bolt group 901, and the motor 1 drives the impeller to work through the internal and external magnetic components.

[0047] Embodiment 1

[0048] The magnetic pump is composed of a motor 1 and a pump head part, and the pump head part is divided into three parts: a rear cover assembly, an impeller rotor assembly and a volute assembly.

[0049] Manufacturing of rear cover assembly; the rear cover assembly is composed of a plastic rear cover 301, a silicon carbide shaft 302 and a silicon carbide bearing 303. The silicon carbide shaft 302 is inserted into the hole of the silicon carbide bearing 303, and the plastic rear cover 301, the silicon carbide shaft 302 and the silicon carbide bearing 303 are put into an injection mold together, and the hot-melt plastic particles wrap the silicon carbide part to form it as a whole;

[0050] Impeller rotor assembly manufacturing; composed of an inner magnetic base 401, an inner magnetic magnet 402, an impeller inner magnetic chamber with blades 403, a silicon carbide sleeve 404, an impeller front cover plate 405, an impeller silicon carbide ring 4061, and an impeller rotor rear cover 4062; when manufacturing the impeller rotor body, the silicon carbide sleeve 404 is placed in the mold, the support in the mold is positioned through the sleeve hole, the inner magnetic magnet 402 and the inner magnetic base 401 are glued together, and after dynamic balancing, they are placed in the mold, and positioned through four holes reserved by the end surface processing of the inner magnetic base 401, and then the hot-melt plastic particles are wrapped with the silicon carbide parts to form the impeller inner magnetic chamber with blades 403;

[0051] Then, the impeller front cover plate 405 assembly is manufactured, the impeller silicon carbide ring 4061 is placed in the mold, the inner hole and the end face of the impeller silicon carbide ring 4061 are fixed by a bracket, the impeller front cover plate 405 is injection molded to wrap the impeller silicon carbide ring 4061 to form the impeller front cover plate 405 assembly, and then the impeller front cover plate 405 assembly is hot-melt welded with the impeller rotor body and the impeller rotor rear cover 4062 to manufacture the impeller rotor blank, and after machining, the final impeller rotor is obtained;

[0052] Production of volute assembly; The volute assembly consists of a volute silicon carbide ring 5031, a plastic volute 5032, an outlet movable flange 5033, an outlet flange adapter 5034, an inlet flange adapter 5035, an inlet movable flange 5036, an outlet flange sealing ring 5037, an inlet flange sealing ring 5038, a drain bolt 501 and a drain sealing ring 502. When producing the volute body, first put the volute silicon carbide ring 5031 into the mold, locate the inner hole and end face of the volute silicon carbide ring 5031 by a bracket, and wrap the volute silicon carbide ring 5031 with an integrally formed plastic volute 5032 by injection molding to form the volute body. The volute body is then machined to obtain the volute body of the final size. After the volute body of the final size is obtained, the outlet movable flange 5033 and the inlet movable flange 5036 are respectively put on the outlet and the inlet of the volute body, and the outlet flange sealing ring 5037 and the inlet flange sealing ring 5038 are respectively installed in the sealing grooves of the outlet flange adapter 5034 and the inlet flange adapter 5035, and the outlet movable flange 5033 and the inlet movable flange 5036 are connected to the volute body by threads, and then the drain port bolt 501 and the drain port sealing ring 502 are connected to the volute body by threads to form a volute assembly;

[0053] The pump head part is formed; the external magnetic cast iron base 601, the external magnetic magnet 602, the external magnetic sealing ring 603 and the external magnetic sealing cover 604 constitute an external magnetic assembly, the external magnetic assembly is connected to the motor 1 through the set screws 7 and the flat key 8, and then the drive chamber 2 is connected to the motor 1 and the motor base 902 through the bolt group 901, the silicon carbide shaft 302 in the rear cover assembly is matched with the silicon carbide sleeve 404 hole in the impeller rotor assembly, the rear cover and the volute sealing ring 10 are sleeved on the outer ring of the rear cover assembly, and matched with the inner hole of the volute assembly to form the pump head part;

[0054] Finally, the pump head and the driving chamber 2 are connected by the bolt group 901, and the bolt protection cover 903 is put on the bolt group 901, so that the motor 1 can drive the impeller to work through the internal and external magnetic components.

[0055] The above-mentioned embodiment reduces the use of seals and reduces costs by integrally injecting the pump head components, and the structure is highly integrated, which is convenient for replacement and assembly. The integral injection molding process can reduce the welding process in the pump manufacturing process, improve the reliability of the pump head components, avoid the impeller and silicon carbide ring from falling off, reduce the production and assembly processes, improve production efficiency, reduce enterprise costs, reduce machining instability, reduce cumulative errors, improve the dimensional accuracy of parts, and improve the working efficiency of the pump.

[0056] Embodiment 2

[0057] The magnetic pump is composed of a motor 1 and a pump head part, and the pump head part is divided into three parts: a rear cover assembly, an impeller rotor assembly and a volute assembly.

[0058] Manufacturing of rear cover assembly; the rear cover assembly is composed of a plastic rear cover 301, a silicon carbide shaft 302 and a silicon carbide bearing 303. The silicon carbide shaft 302 is inserted into the hole of the silicon carbide bearing 303, and the plastic rear cover 301, the silicon carbide shaft 302 and the silicon carbide bearing 303 are put into an injection mold together, and the hot-melt plastic particles wrap the silicon carbide part to form it as a whole;

[0059] Impeller rotor assembly manufacturing; composed of an inner magnetic base 401, an inner magnetic magnet 402, an impeller inner magnetic chamber with blades 403, a silicon carbide sleeve 404, an impeller front cover plate 405 and positioning pins 407; when manufacturing the impeller rotor body, firstly insert the silicon carbide sleeve 404 into the inner magnetic magnet 402 and glue it with the inner magnetic base 401 to form an assembly, and when the pin hole on the outer surface of the silicon carbide sleeve 404 corresponds to the pin hole on the inner magnetic base 401, use four positioning pins 407 to fix the assembly of the silicon carbide sleeve 404, the inner magnetic base 401 and the inner magnetic magnet 402, and put it into a mold, use a bracket to pass through the inner hole of the silicon carbide sleeve 404, and fix the end face of the silicon carbide sleeve 404, and injection mold it into the impeller inner magnetic chamber with blades 403 to obtain the impeller rotor body;

[0060] The injection-molded impeller front cover plate 405 is then hot-melt welded to the impeller rotor body to form an impeller rotor blank, and finally machined to obtain a final impeller rotor;

[0061] Production of volute assembly; the volute assembly consists of a drain bolt 501, a drain seal ring 502, a volute outlet fixing flange 5041 and an inlet flange 5042. When producing the volute body, first put the silicon carbide bearing 303 into the mold, position the inner hole and end face of the silicon carbide bearing 303 by a bracket, and form the volute body by injection molding the volute outlet fixing flange 5041 to wrap the silicon carbide bearing 303, and then machine the volute body to obtain the volute body of the final size. After obtaining the volute body of the final size, the inlet flange 5042 and the volute body are hot-melt welded, and finally the drain bolt 501 and the drain seal ring 502 are connected to the volute body by threads to form the volute assembly;

[0062] The pump head part is formed; the external magnetic cast iron base 601, the external magnetic magnet 602, the external magnetic sealing ring 603 and the external magnetic sealing cover 604 constitute an external magnetic assembly, the external magnetic assembly is connected to the motor 1 through the set screws 7 and the flat key 8, and then the drive chamber 2 is connected to the motor 1 and the motor base 902 through the bolt group 901, the silicon carbide shaft 302 in the back cover assembly is matched with the silicon carbide sleeve 404 hole in the impeller rotor assembly and the silicon carbide bearing 303 in the volute assembly, the back cover and volute sealing ring 10 are sleeved on the outer ring of the back cover assembly, and matched with the inner hole of the volute assembly to form the pump head part;

[0063] Finally, the pump head and the driving chamber 2 are connected by the bolt group 901, and the bolt protection cover 903 is put on the bolt group 901, so that the motor 1 can drive the impeller to work through the internal and external magnetic components.

[0064] The plastic magnetic pump in the above-mentioned embodiment adopts a spiral volute and a cylindrical blade impeller, and the pump efficiency is greatly improved. The pump head parts are integrally injection molded, the structure is simpler, the integration is higher, it is easy to replace and assemble, reduce welding process, improve the reliability of pump head parts, avoid the impeller and silicon carbide ring from falling off, and the one-piece injection molding process can reduce production and assembly procedures, improve production efficiency, reduce enterprise costs, reduce the phenomenon of instability of pump head parts machining, reduce cumulative errors, improve part dimensional accuracy, improve pump efficiency, and reduce the use of silicon carbide parts, which greatly improves the reliability of pump operation and effectively reduces the risk of damage to silicon carbide parts. At the same time, the volute and outlet flange are integrally injection molded, and the inlet flange 5042 is hot-melt welded to eliminate the risk of inlet and outlet leakage and reduce the cost of sealing ring parts.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a highly integrated structural plastic magnetic pump, characterized in that: The steps include: Step 1: Making the rear cover assembly: Put the shaft and other parts into the injection mold, and wrap the parts with hot-melt plastic particles to make the rear cover assembly integrally injection-molded; Step 2: Impeller rotor assembly production: The inner magnetic base, inner magnetic magnet, silicon carbide sleeve and other parts are placed in the injection mold, and the impeller front cover and the impeller inner magnetic chamber with blades are produced by one-piece injection molding to form an impeller rotor blank, which is machined to obtain the final impeller rotor assembly; Step 3: Making the volute assembly: Put the relevant parts into the mold for integral molding and injection molding to form the volute body, then machine the volute body to obtain the volute body of the final size, connect the flange to the volute body, and then connect the drain bolts and the drain sealing ring to the volute body to form the volute assembly; Step 4: Assemble the pump head part; the external magnetic cast iron base, the external magnetic magnet, the external magnetic sealing ring and the external magnetic sealing cover constitute the external magnetic assembly, the external magnetic assembly is connected to the motor, the drive chamber is connected to the motor, the motor base is connected to the existing equipment, the rear cover assembly is matched with the silicon carbide sleeve, and the rear cover and the volute sealing ring are installed on the rear cover assembly, and matched with the volute assembly to form the pump head part; Step 5: Connect the pump head, drive chamber and motor, and drive the impeller through the internal and external magnetic components.

2. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 1, characterized in that: In the step 2, when making the impeller rotor body, the silicon carbide sleeve is placed in the mold, the sleeve is positioned by a bracket in the mold, the magnet and the inner magnetic base are assembled and connected, and after dynamic balancing, it is placed in the mold, and positioned by multiple holes reserved by machining the end face of the inner magnetic base, and then the hot-melt plastic particles are wrapped around the corresponding parts to form the impeller inner magnetic chamber with blades; Then the impeller front cover assembly is made. The impeller silicon carbide ring is placed in the mold, the inner hole and end face of the impeller silicon carbide ring are fixed with a bracket, the impeller front cover is injection molded and the wheel silicon carbide ring is wrapped to form the impeller front cover assembly, and then the impeller front cover assembly is hot-melt welded with the impeller rotor body and the impeller rotor rear cover to form an impeller rotor blank, and the final impeller rotor assembly is obtained after machining.

3. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 1, characterized in that: In the step 2, when making the impeller rotor body, first insert the silicon carbide sleeve into the assembly hole of the inner magnetic magnet and the inner magnetic base glued together, and when the pin hole on the outer surface of the silicon carbide sleeve corresponds to the pin hole reserved on the inner magnetic base, use multiple pins to fix the assembly of the silicon carbide sleeve, the inner magnetic base and the inner magnetic magnet, put the parts into a mold, use a bracket to pass through the inner hole of the silicon carbide sleeve, and fix the end face of the silicon carbide sleeve, and hot-melt particles are injection molded into an impeller inner magnetic chamber with blades to obtain the impeller rotor body; The injection-molded impeller front cover plate is then hot-melt welded to the impeller rotor body to form an impeller rotor blank, which is then machined to obtain a final impeller rotor assembly.

4. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 2, characterized in that: In the step three, when making the volute body, the volute silicon carbide ring is first placed in the mold, the inner hole and end face of the silicon carbide ring are positioned by a bracket, and the volute silicon carbide ring is wrapped by injection molding to form a preliminary volute body, which is then machined to obtain the volute body of the final size.

5. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 3, characterized in that: In the step three, when making the volute body, the silicon carbide bearing is first placed in the mold, the inner hole and end face of the silicon carbide bearing are positioned by a bracket, and the silicon carbide bearing is wrapped with an injection-molded one-piece volute with an outlet fixing flange to form a preliminary volute body, which is then machined to obtain a volute body of the final size.

6. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 2, characterized in that: After the volute body of the final size is obtained in the step three, the outlet movable flange and the inlet movable flange are respectively put on the outlet and inlet of the volute body, and the outlet flange sealing ring and the inlet flange sealing ring are respectively installed in the sealing grooves of the outlet flange adapter and the inlet flange adapter, and connected to the volute body through threads, and finally the drain outlet bolts and the drain outlet sealing ring are connected to the volute body through threads to form a volute assembly.

7. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 3, characterized in that: After the volute body of the final size is obtained in the step three, the inlet flange and the volute body are welded by hot melt, and finally the drain port bolts and the drain port sealing ring are connected to the volute body by threads to form a volute assembly.

8. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 2, characterized in that: In step 4, the rear cover assembly and the silicon carbide sleeve are matched as follows: the silicon carbide shaft in the rear cover assembly is matched with the silicon carbide sleeve hole in the impeller rotor assembly.

9. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 3, characterized in that: In step 4, the rear cover assembly and the silicon carbide sleeve are matched by matching the silicon carbide shaft in the rear cover assembly with the silicon carbide sleeve hole in the impeller rotor assembly and the silicon carbide bearing in the volute assembly.

10. The method for manufacturing a highly integrated structural plastic magnetic pump according to claim 1, characterized in that: In the step 4, the external magnetic assembly is connected to the motor through a set screw and a flat key, and then the drive chamber, the motor and the motor base are connected through a bolt group.

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