A manufacturing method of a star hydraulic pump stator

Abstract

The application discloses a manufacturing method of a plum-blossom liquid pump stator, which comprises the following steps: S1, metal body casting forming, S2, first injection molding monomer and second injection molding monomer installation, S3, upper mold installation, S4, engineering plastic layer one-time injection molding forming and demolding, and S5, engineering plastic layer secondary injection molding forming and demolding. The application can realize the secondary injection molding forming of the engineering plastic layer, improve the connection strength and stability between the engineering plastic layer and the metal body, prevent the engineering plastic layer from falling off in the injection molding process and affecting the processing quality and stability of the stator, effectively control the deformation amount of the engineering plastic layer, and improve the working stability of the plum-blossom liquid pump.

Description

Technical Field

[0001] This invention relates to the field of liquid pump technology, and in particular to a method for manufacturing a stator for a plum blossom-shaped liquid pump. Background Technology

[0002] In the field of refrigerant delivery, positive displacement pumps, rotary pumps, or centrifugal pumps are traditionally used. During operation, these conventional pumping devices experience wear on moving parts, causing metal powder to flake off from the surface of components and potentially burning out the motor. Furthermore, conventional pumps require lubricating oil or other lubricating agents to operate.

[0003] Computer servers, network devices, and other equipment in a data center generate heat during operation. This heat needs to be removed for the data center equipment to function properly. The performance of a data center is affected by its operating temperature; inadequate cooling of components will impact its efficiency. Data centers are typically organized into rows of racks containing electronic devices that generate heat. Heat can significantly degrade data center performance, for example, causing slow request processing, excessive energy consumption, and premature component failure.

[0004] However, in data center cooling systems, the lubricating oil or other media used in the pumping equipment pose a risk of flowing into the system through the cooling channels. Therefore, data center cooling systems operate in an oil-free state; and the wear of the internal friction pairs of the unlubricated pumping equipment affects the operating efficiency and service life of the cooling system.

[0005] In the prior art, when the stator of a liquid pump is injection molded, an engineering plastic layer is generally formed by a one-time injection molding process. Conventional engineering plastic injection layers shrink after cooling and are prone to deformation. At the same time, due to defects in structural design, the engineering plastic layer is prone to falling off, affecting the processing quality and service life of the stator, and thus affecting the friction and wear of the liquid pump during operation. Summary of the Invention

[0006] The purpose of this invention is to provide a technical solution for manufacturing a stator of a plum blossom liquid pump, which addresses the shortcomings of existing technologies. This method not only enables secondary injection molding of the engineering plastic layer but also improves the connection strength and stability between the engineering plastic layer and the metal body. It prevents the engineering plastic layer from falling off during the injection molding process, thus affecting the processing quality and stability of the stator. At the same time, it effectively controls the deformation of the engineering plastic layer, thereby improving the working stability of the plum blossom liquid pump.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A method for manufacturing a stator of a plum blossom-shaped liquid pump, characterized by comprising the following steps:

[0009] S1, Metal body casting

[0010] a. First, the required metal body is formed by casting. The metal body has a compression cavity, an inlet channel and an outlet channel that are distributed in a plum blossom pattern. On the side near the inlet channel, there are protrusions that are distributed in a plum blossom pattern. A first guide channel is formed between two adjacent protrusions. The inlet channel is connected to the compression cavity through the first guide channel, and the outlet channel is connected to the compression cavity through the second guide channel. On the side of the metal body near the outlet channel, there are weight reduction holes that are distributed in a ring.

[0011] b. Then, grooves are made along the inner wall of the compression chamber and the top surface of the protrusion;

[0012] S2, Installation of the first injection unit and the second injection unit

[0013] a. First, select the first injection molding unit according to the design requirements, and splice two adjacent first injection molding units together with T-blocks and T-slots to form a ring-shaped plum blossom structure;

[0014] b. The top surface of the first injection molding unit is provided with a second assembly block and a third assembly block, and the two third assembly blocks on the same side of two adjacent first injection molding units are fixed together by a third fastener;

[0015] c. Then, according to the size of the first injection unit and the size of the plum blossom groove of the upper mold, the corresponding second injection unit is made. The second injection unit is nested along the outer side of the first injection unit in sequence so that the second injection unit corresponds to the first injection unit one by one. Then, the first locking block on the second injection unit is fixed to the first injection unit with fastening screws.

[0016] d. Next, insert the assembled first injection unit and second injection unit into the plum blossom groove of the upper mold until the top surfaces of the first injection unit and the second injection unit are flush with the top surface of the upper mold. The top surface of the upper mold has first assembly blocks distributed in a ring along the plum blossom groove. The adjacent first assembly blocks and second assembly blocks are fixed by the second fastener.

[0017] S3, Upper mold installation

[0018] a. First, make a pressure plate of the corresponding size according to the groove in the upper mold, and open injection holes along the pressure plate;

[0019] b. Then, each pressure plate is assembled into its corresponding groove, and the pressure plate is fixedly connected to the upper mold by fastening screws;

[0020] c. Next, place the processed metal body into the cavity of the lower mold, and limit the outlet flow channel on the metal body by the outlet flow channel forming block.

[0021] d. Finally, the upper mold is fitted onto the top of the lower mold, so that the ring structure formed by the arc blocks on each of the first injection units is inserted into the limiting hole of the lower mold, and the protrusion on the metal body is limited in the groove of the upper mold. At the same time, the card block at the bottom of the second fixing strip on the outside of the upper mold is inserted into the card slot at the top of the first fixing strip on the outside of the lower mold, and the upper mold and the lower mold are fixed by the first fastener.

[0022] S4, Engineering plastic layer, one-time injection molding and demolding

[0023] a. The molten elastomer material is injected through the injection tube of the upper mold and through the injection hole on the pressure plate to form an engineering plastic layer in one injection molding process. The thickness of the engineering plastic layer formed in one injection molding process is 2.5-3mm.

[0024] b. After the engineering plastic layer of the injection molding reaches the required temperature, demolding is performed. When demolding, first open the two second fasteners and two third fasteners on the same first injection unit, and simultaneously remove one set of first injection units and second injection units. Then open the second fasteners and third fasteners on the adjacent first injection units, and simultaneously remove one set of first injection units and second injection units, until all first injection units are removed in sequence.

[0025] c. Next, open the first fastener and remove the upper mold;

[0026] S5, Engineering plastic layer secondary injection molding and demolding

[0027] a. First, remove the pressure plate inside the upper mold, and then remove the second injection unit outside the first injection unit;

[0028] b. Then, according to the gap between the first injection molding unit and the plum blossom groove, a corresponding sealing strip is made, and a second locking block is installed on the sealing strip;

[0029] c. Next, the required first injection molding units are spliced ​​together using the third fastener to form a ring structure. Then, the sealing strip is fitted onto the outer surface of the corresponding first injection molding unit, and the second locking block is fixedly connected to the first injection molding unit.

[0030] d. Insert the first injection unit and sealing strip into the plum blossom groove until the top surface of the first injection unit is flush with the top surface of the upper mold. Secure the first injection unit to the upper mold using the second fastener. Then, install the upper mold onto the lower mold for fixation.

[0031] e. The molten elastomer material is injected through the injection tube to form a secondary injection molding of the engineering plastic layer. The thickness of the secondary injection molding of the engineering plastic layer is 0.5-1mm. After the secondary injection molding of the engineering plastic layer reaches the required temperature, the mold is demolded. During demolding, first open the two second fasteners and two third fasteners on the same first injection unit, and simultaneously remove one set of first injection units and third injection units. Then open the second fasteners and third fasteners on the adjacent first injection units, and simultaneously remove one set of first injection units and third injection units, until all the first injection units are removed in sequence.

[0032] f. Finally, open the first fastener and remove the upper mold.

[0033] This manufacturing method is simple in steps, and can not only realize the secondary injection molding of the engineering plastic layer, but also improve the connection strength and stability between the engineering plastic layer and the metal body, prevent the engineering plastic layer from falling off during the injection molding process and affecting the processing quality and stability of the stator, and effectively control the deformation of the engineering plastic layer, thereby improving the working stability of the plum blossom liquid pump.

[0034] Furthermore, in step S1 process a, a sealing groove is provided on the side of the metal body near the outlet flow channel. The sealing groove is distributed along the end face of the compression chamber and the outlet flow channel to form a closed structure. The design of the sealing groove facilitates the sealing assembly of the pump cover plate and the stator of the plum blossom liquid pump, preventing liquid from overflowing from the gap between the pump cover plate and the stator.

[0035] Furthermore, the T-shaped block and T-shaped groove in step S2 process a are set on two adjacent sides of the first injection molding unit, which facilitates the mutual limiting connection between multiple first injection molding units, improves the stability and reliability of the installation of the first injection molding unit, and at the same time facilitates the first injection molding unit to be pulled out vertically during demolding, improves the demolding quality, and reduces the deformation of the engineering plastic layer.

[0036] Furthermore, in step S2, the thickness of the second injection unit is the same as the thickness of the second injection of the engineering plastic layer. After the first engineering plastic layer is injection molded, the second injection unit can be removed, and the gap between the first injection unit and the upper mold can be sealed, which greatly improves the efficiency and quality of injection molding and improves the processing accuracy.

[0037] Furthermore, the thickness of the pressure plate in step S3a is the thickness of the engineering plastic layer for the second injection molding. The second injection molding of the engineering plastic layer can be carried out by removing the pressure plate, which is flexible and convenient to use.

[0038] Furthermore, in step S3, the arc-shaped block is positioned at the bottom of the first injection molding unit near the corner, and the outer edge of the arc-shaped block matches the limiting hole in the lower mold, thereby improving the connection stability between the injection molding unit and the lower mold and further improving the injection molding quality of the engineering plastic layer.

[0039] Furthermore, the injection temperature of the first molten elastomer material in steps S4 and S5 is 400°C, and the injection temperature of the second molten elastomer material is 300°C.

[0040] Furthermore, in step S5, the third injection molding monomer is distributed along the outer side of the first injection molding monomer, and at least two third injection molding monomers are spliced ​​together to form a closed structure, which facilitates the installation, disassembly and demolding of the third injection molding monomer.

[0041] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0042] 1. This manufacturing method has simple steps, which can not only realize the secondary injection molding of the engineering plastic layer, but also improve the connection strength and stability between the engineering plastic layer and the metal body, prevent the engineering plastic layer from falling off during the injection molding process and affecting the processing quality and stability of the stator, and effectively control the deformation of the engineering plastic layer, thereby improving the working stability of the plum blossom liquid pump.

[0043] 2. The T-shaped block and T-shaped groove are located on two adjacent sides of the first injection molding unit, which facilitates the mutual limiting connection between multiple first injection molding units, improves the stability and reliability of the installation of the first injection molding unit, and at the same time facilitates the first injection molding unit to be pulled out vertically during demolding, improves the demolding quality, and reduces the deformation of the engineering plastic layer.

[0044] 3. The thickness of the second injection unit is the same as the thickness of the second injection of the engineering plastic layer. After the first engineering plastic layer is injection molded, the second injection unit can be removed, and the gap between the first injection unit and the upper mold can be sealed, greatly improving the efficiency and quality of injection molding and increasing processing precision. The thickness of the pressure plate is also the same as the thickness of the second injection of the engineering plastic layer. The second injection molding of the engineering plastic layer can be performed by removing the pressure plate, making it flexible and convenient to use. Attached image description:

[0045] The present invention will be further described below with reference to the accompanying drawings:

[0046] Figure 1 This is a flowchart of a method for manufacturing a plum blossom-shaped liquid pump stator according to the present invention;

[0047] Figure 2 This is a schematic diagram showing the connection between the upper mold and the lower mold in this invention;

[0048] Figure 3This is a schematic diagram of the lower mold in this invention;

[0049] Figure 4 This is a schematic diagram showing the connection between the upper mold, the first injection molding unit, and the second injection molding unit in this invention;

[0050] Figure 5 for Figure 4 Schematic diagram of the structure in direction A;

[0051] Figure 6 This is a schematic diagram of the splicing of the first injection molding monomer and the second injection molding monomer in this invention;

[0052] Figure 7 This is a schematic diagram of the connection of the third injection molding monomer in this invention;

[0053] Figure 8 This is a rendering of the upper mold in this invention;

[0054] Figure 9 for Figure 8 Schematic diagram of the structure in the B direction;

[0055] Figure 10 This is a schematic diagram showing the distribution of the third injection molding monomer in this invention;

[0056] Figure 11 This is a schematic diagram of the stator structure in this invention;

[0057] Figure 12 for Figure 11 Schematic diagram of the structure in the C-direction;

[0058] Figure 13 This is a cross-sectional view of the stator in this invention.

[0059] In the diagram: 1-Stator; 101-Inlet channel; 102-Protrusion; 103-Compression chamber; 104-First guide channel; 105-Ear plate; 106-Outlet channel; 107-Second guide channel; 108-Sealing groove; 109-Weight reduction hole; 110-Metal body; 111-Engineering plastic layer; 112-Groove;

[0060] 2-Lower mold; 201-Cavity; 202-Limiting hole; 203-Outlet flow channel forming block;

[0061] 3-Upper mold; 301-Injection tube; 302-Plum blossom groove; 303-Groove;

[0062] 401-First fixing strip; 402-Second fixing strip; 403-First fastener; 404-Slot; 405-Block;

[0063] 5-Core; 501-First injection molding unit; 502-Second injection molding unit; 503-T-block; 504-T-slot; 505-Arc-shaped block; 506-First locking block; 507-Sealing strip; 508-Second locking block;

[0064] 601 - First assembly block; 602 - Second assembly block; 603 - Second fastener;

[0065] 701 - Third assembly block; 702 - Third fastener;

[0066] 8-Third injection molding unit; 801-Pressure plate; 802-Fasting screw; 803-Injection hole. Detailed Implementation

[0067] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0068] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the scope of protection of the present invention.

[0069] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0070] The stator of the plum blossom liquid pump of the present invention is as follows: Figures 11 to 13As shown, the stator 1 has an inlet channel 101 and an outlet channel 106 at both ends. The stator 1 has an integrally cast compression chamber 103. The inlet channel 101 has protrusions 102 arranged in a quincunx pattern. A first guide channel 104 is formed between two adjacent protrusions 102. The inlet channel 101 is connected to the compression chamber 103 through the first guide channel 104. The outlet channel 106 is arranged in a quincunx pattern. The outlet channel 106 is connected to the compression chamber 103 through a second guide channel 107. Through the design of the above structure, it can be ensured that the liquid enters the compression chamber 103 from the inlet channel 101 through the first guide channel 104, and after being compressed by the rotor and the stator 1, it enters each outlet channel 106 through the second guide channel 107 and is discharged. The stator 1 has a weight-reducing cavity and a sealing groove 108 on the end face near the outlet flow channel 106. The weight-reducing holes 109 are distributed in a ring shape. The sealing groove 108 forms a sealing structure along the end faces of the outlet flow channel 106 and the compression cavity 103. The weight-reducing holes 109 can greatly reduce the weight of the entire stator 1, further reducing the weight of the liquid pump. The sealing groove 108 is used to install a sealing ring. The stator 1 has an ear plate 105 on its outer circumferential side for assembly.

[0071] The stator 1 includes a metal body 110 and an engineering plastic layer 111. The thickness of the engineering plastic layer 111 is 2-4 mm. Grooves 112 are provided on the side of the metal body 110 near the compression chamber 103 and on the top surface of the protrusion. The engineering plastic layer 111 is connected to the metal body 110 through the grooves 112. The design of the grooves 112 helps to wrap the engineering plastic layer 111 around the side of the compression chamber 103 and the top surface of the protrusion, making it less likely to fall off and reducing friction and wear between the rotor and the stator 1 when the rotor rotates. The metal body 110 can be made of aluminum alloy, which can ensure the strength of the entire stator 1.

[0072] The refrigerant in the cooling system easily evaporates and forms a gaseous state, resulting in dry operation of the pumping equipment. The engineering plastic layer 111 is made of elastomer materials, such as rubber and polyetheretherketone (PEEK), with PEEK being the preferred material. This material is non-conductive, so even tiny particles worn off will not damage the motor; at the same time, elastomer materials have good affinity and can withstand dry operation, meeting the requirements of dry operation of the cooling system pumping equipment.

[0073] like Figures 1 to 10 The diagram illustrates a method for manufacturing a plum blossom-shaped liquid pump stator according to the present invention, comprising the following steps:

[0074] S1, Metal body 110 casting molding

[0075] a. First, the required metal body 110 is formed by casting. The metal body 110 has compression chambers 103, inlet channels 101, and outlet channels 106 integrally formed on it in a quincunx pattern. On the side near the inlet channel 101, protrusions 102 are integrally formed in a quincunx pattern. A first guide channel 104 is formed between two adjacent protrusions 102. The inlet channel 101 is connected to the compression chamber 103 through the first guide channel 104, and the outlet channel 106 is connected to the compression chamber 103 through the second guide channel 107. The compression chamber 103 has a weight-reducing hole 109 integrally formed on the side of the metal body 110 near the outlet flow channel 106. The weight-reducing hole 109 is distributed in a ring. A sealing groove 108 is provided on the side of the metal body 110 near the outlet flow channel 106. The sealing groove 108 is distributed along the end face of the compression chamber 103 and the outlet flow channel 106 to form a closed structure. The design of the sealing groove 108 facilitates the sealing assembly of the pump cover plate of the plum blossom liquid pump with the stator 1, preventing liquid from overflowing from the gap between the pump cover plate and the stator 1.

[0076] b. Then, grooves 112 are made along the inner wall of the compression cavity 103 and the top surface of the protrusion 102. The grooves 112 in the compression cavity 103 can be distributed at equal intervals in the vertical direction, and the grooves 112 on the protrusion 102 can be distributed at equal intervals in the horizontal direction. The grooves 112 at the ends are deeper than the grooves 112 in the middle, which is beneficial to the connection strength between the engineering plastic layer 111 and the metal body 110 at the corner, and further improves the stability and reliability of injection molding.

[0077] S2, Installation of the first injection molding unit 501 and the second injection molding unit 502

[0078] a. First, select the first injection molding unit 501 according to the design requirements. Then, connect two adjacent first injection molding units 501 with T-shaped blocks 503 and T-shaped grooves 504 to form a ring-shaped plum blossom structure. The T-shaped blocks 503 and T-shaped grooves 504 are located on two adjacent sides of the first injection molding unit 501, which facilitates the mutual limiting connection between multiple first injection molding units 501, improves the stability and reliability of the installation of the first injection molding unit 501, and at the same time facilitates the first injection molding unit 501 to be pulled out vertically during demolding, improves the demolding quality, and reduces the deformation of the engineering plastic layer 111.

[0079] b. The top surface of the first injection molding unit 501 is provided with a second assembly block 602 and a third assembly block 701. The two third assembly blocks 701 located on the same side of two adjacent first injection molding units 501 are fixed by a third fastener 702. The core 5 of this application is composed of three first injection molding units 501 spliced ​​together. Through the design of the second assembly block 602 and the third assembly block 701, it is convenient to demold the first injection molding units 501 one by one, thereby improving the processing quality of the stator 1.

[0080] c. Then, based on the dimensions of the first injection molding unit 501 and the dimensions of the plum blossom groove 302 of the upper mold 3, a corresponding second injection molding unit 502 is made. The second injection molding units 502 are nested along the outer side of the first injection molding unit 501 in sequence, so that the second injection molding units 502 correspond one-to-one with the first injection molding units 501. Then, the first locking block 506 on the second injection molding unit 502 is fixed to the first injection molding unit 501 by fastening screws 802. The thickness of the second injection molding unit 502 is the thickness of the engineering plastic layer 111 during the second injection. After the first engineering plastic layer 111 is injected, the second injection molding unit 502 can be removed, and the gap between the first injection molding unit 501 and the upper mold 3 can be sealed, which greatly improves the efficiency and quality of injection molding and improves the processing accuracy.

[0081] d. Next, the assembled first injection molding unit 501 and second injection molding unit 502 are inserted into the plum blossom groove 302 of the upper mold 3 until the top surfaces of the first injection molding unit 501 and the second injection molding unit 502 are flush with the top surface of the upper mold 3. The top surface of the upper mold 3 has first assembly blocks 601 distributed in a ring along the plum blossom groove 302. The adjacent first assembly blocks 601 and second assembly blocks 602 are fixed by the second fasteners 603, which greatly improves the connection strength and stability between the first injection molding unit 501, the second injection molding unit 502 and the upper mold 3, and facilitates demolding.

[0082] S3, Upper mold 3 installation

[0083] a. First, make a pressure plate 801 of the corresponding size according to the groove 303 in the upper mold 3, and open injection holes 803 along the pressure plate 801; the thickness of the pressure plate 801 is the thickness of the engineering plastic layer 111 for the second injection molding. The second injection molding of the engineering plastic layer 111 can be carried out by removing the pressure plate 801, which is flexible and convenient to use.

[0084] b. Then each pressure plate 801 is assembled into the corresponding groove 303, and the pressure plate 801 is fixedly connected to the upper mold 3 by fastening screws 802, so as to facilitate the one-time injection molding of the engineering plastic layer 111 on the protrusion 102.

[0085] c. Next, the processed metal body 110 is placed into the cavity 201 of the lower mold 2, and the outlet flow channel 106 on the metal body 110 is limited by the outlet flow channel forming block 203.

[0086] d. Finally, the upper mold 3 is fitted onto the top of the lower mold 2, so that the ring structure formed by the arc blocks 505 on each of the first injection molding units 501 is inserted into the limiting hole 202 of the lower mold 2. The protrusion 102 on the metal body 110 is limited in the groove 303 of the upper mold. At the same time, the locking block 405 at the bottom of the second fixing strip 402 on the outside of the upper mold 3 is inserted into the locking groove 404 at the top of the first fixing strip 401 on the outside of the lower mold 2. The upper mold 3 and the lower mold 2 are fixed by the first fastener 403. The arc block 505 is located at the bottom of the first injection molding unit 501 near the corner. The outer edge of the arc block 505 matches the limiting hole 202 in the lower mold 2, which improves the connection stability between the injection molding unit and the lower mold 2, and further improves the injection quality of the engineering plastic layer 111.

[0087] S4, Engineering plastic layer 111, one-time injection molding and demolding

[0088] a. The molten elastomer material is injected through the injection tube 301 of the upper mold 3 and the injection hole 803 on the pressure plate 801 to form the engineering plastic layer 111 in one injection molding. The thickness of the engineering plastic layer 111 formed in one injection molding is 2.5-3mm. The injection temperature of the first molten elastomer material is 400℃, and the injection temperature of the second molten elastomer material is 300℃.

[0089] b. After the engineering plastic layer 111 formed by injection molding reaches the required temperature, demolding is performed. During demolding, first open the two second fasteners 603 and two third fasteners 702 on the same first injection unit 501, and simultaneously remove one set of first injection units 501 and second injection units 502. Then open the second fasteners 603 and third fasteners 702 on adjacent first injection units 501, and simultaneously remove one set of first injection units 501 and second injection units 502, until all first injection units 501 are removed in sequence.

[0090] c. Next, open the first fastener 403 and remove the upper mold 3;

[0091] S5, Engineering Plastic Layer 111, Secondary Injection Molding and Demolding

[0092] a. First, remove the pressure plate 801 inside the upper mold 3, and remove the second injection unit 502 outside the first injection unit 501.

[0093] b. Then, according to the gap between the first injection molding unit 501 and the plum blossom groove 302, a corresponding sealing strip 507 is made, and a second locking block 508 is installed on the sealing strip 507.

[0094] c. Next, the required first injection molding unit 501 is spliced ​​together using the third fastener 702 to form a ring structure. Then, the sealing strip 507 is fitted onto the outer surface of the corresponding first injection molding unit 501, and the second locking block 508 is fixedly connected to the first injection molding unit 501. The third injection molding unit 8 is distributed along the outer side of the first injection molding unit 501, and at least two third injection molding units 8 are spliced ​​together to form a closed structure, which facilitates the installation, disassembly and demolding of the third injection molding unit 8.

[0095] d. Insert the first injection molding unit 501 and the sealing strip 507 into the plum blossom groove 302 until the top surface of the first injection molding unit 501 is flush with the top surface of the upper mold 3. Then, fix the first injection molding unit 501 to the upper mold 3 using the second fastener 603. Finally, install the upper mold 3 onto the lower mold 2 for fixation.

[0096] e. The molten elastomer material is injection molded into an engineering plastic layer 111 through the injection tube 301. The thickness of the engineering plastic layer 111 after secondary injection molding is 0.5-1mm. After the engineering plastic layer 111 reaches the required temperature, it is demolded. During demolding, the two second fasteners 603 and the two third fasteners 702 on the same first injection unit 501 are opened first, and one set of first injection units 501 and third injection units 8 are removed simultaneously. Then the second fasteners 603 and third fasteners 702 on the adjacent first injection units 501 are opened, and one set of first injection units 501 and third injection units 8 are removed simultaneously, until all the first injection units 501 are removed in sequence.

[0097] f. Finally, open the first fastener 403 and remove the upper mold 3.

[0098] The manufacturing method is simple and can not only realize the secondary injection molding of the engineering plastic layer 111, but also improve the connection strength and stability between the engineering plastic layer 111 and the metal body 110, prevent the engineering plastic layer 111 from falling off during the injection molding process and affecting the processing quality and stability of the stator 1. At the same time, it effectively controls the deformation of the engineering plastic layer 111 and improves the working stability of the plum blossom liquid pump.

[0099] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to achieve substantially the same technical effect are all covered within the protection scope of the present invention.

Claims

1. A method for manufacturing a stator of a plum blossom-shaped liquid pump, characterized in that... Includes the following steps: S1, Metal body casting a. First, the required metal body is formed by casting. The metal body has a compression cavity, an inlet channel, and an outlet channel integrally formed in a quincunx pattern. On the side near the inlet channel, protrusions are integrally formed in a quincunx pattern, and a first guide channel is formed between two adjacent protrusions. The inlet channel is connected to the compression cavity through the first guide channel, and the outlet channel is connected to the compression cavity through a second guide channel. Weight reduction holes are integrally formed on the side of the metal body near the outlet channel, and the weight reduction holes are distributed in a ring. A sealing groove is provided on the side of the metal body near the outlet channel. The sealing groove is distributed along the end faces of the compression cavity and the outlet channel to form a closed structure. b. Then, grooves are made along the inner wall of the compression chamber and the top surface of the protrusion; S2, Installation of the first injection unit and the second injection unit a. First, select the first injection molding unit according to the design requirements, and splice two adjacent first injection molding units together with T-blocks and T-slots to form a ring-shaped plum blossom structure; b. The top surface of the first injection molding unit is provided with a second assembly block and a third assembly block, and the two third assembly blocks on the same side of two adjacent first injection molding units are fixed together by a third fastener; c. Then, according to the size of the first injection unit and the size of the plum blossom groove of the upper mold, the corresponding second injection unit is made. The second injection unit is nested along the outer side of the first injection unit in sequence so that the second injection unit corresponds to the first injection unit one by one. Then, the first locking block on the second injection unit is fixed to the first injection unit with fastening screws. d. Next, insert the assembled first injection unit and second injection unit into the plum blossom groove of the upper mold until the top surfaces of the first injection unit and the second injection unit are flush with the top surface of the upper mold. The top surface of the upper mold has first assembly blocks distributed in a ring along the plum blossom groove. The adjacent first assembly blocks and second assembly blocks are fixed by the second fastener. S3, Upper mold installation a. First, make a pressure plate of the corresponding size according to the groove in the upper mold, and open injection holes along the pressure plate; b. Then, each pressure plate is assembled into its corresponding groove, and the pressure plate is fixedly connected to the upper mold by fastening screws; c. Next, place the processed metal body into the cavity of the lower mold, and limit the outlet flow channel on the metal body by the outlet flow channel forming block. d. Finally, the upper mold is fitted onto the top of the lower mold, so that the ring structure formed by the arc blocks on each of the first injection units is inserted into the limiting hole of the lower mold, and the protrusion on the metal body is limited in the groove of the upper mold. At the same time, the card block at the bottom of the second fixing strip on the outside of the upper mold is inserted into the card slot at the top of the first fixing strip on the outside of the lower mold, and the upper mold and the lower mold are fixed by the first fastener. S4, Engineering plastic layer, one-time injection molding and demolding a. The molten elastomer material is injected through the injection tube of the upper mold and through the injection hole on the pressure plate to form an engineering plastic layer in one injection molding process. The thickness of the engineering plastic layer formed in one injection molding process is 2.5-3mm. b. After the engineering plastic layer of the injection molding reaches the required temperature, demolding is performed. When demolding, first open the two second fasteners and two third fasteners on the same first injection unit, and simultaneously remove one set of first injection units and second injection units. Then open the second fasteners and third fasteners on the adjacent first injection units, and simultaneously remove one set of first injection units and second injection units, until all first injection units are removed in sequence. c. Next, open the first fastener and remove the upper mold; S5, Engineering plastic layer secondary injection molding and demolding a. First, remove the pressure plate inside the upper mold, and then remove the second injection unit outside the first injection unit; b. Then, according to the gap between the first injection molding unit and the plum blossom groove, a corresponding sealing strip is made, and a second locking block is installed on the sealing strip; c. Next, the required first injection molding units are spliced ​​together using the third fastener to form a ring structure. Then, the sealing strip is fitted onto the outer surface of the corresponding first injection molding unit, and the second locking block is fixedly connected to the first injection molding unit. d. Insert the first injection unit and sealing strip into the plum blossom groove until the top surface of the first injection unit is flush with the top surface of the upper mold. Secure the first injection unit to the upper mold using the second fastener. Then, install the upper mold onto the lower mold for fixation. e. The molten elastomer material is injected through the injection tube to form a secondary injection molding of the engineering plastic layer. The thickness of the secondary injection molding of the engineering plastic layer is 0.5-1mm. After the secondary injection molding of the engineering plastic layer reaches the required temperature, the mold is demolded. During demolding, first open the two second fasteners and two third fasteners on the same first injection unit, and simultaneously remove one set of first injection units and third injection units. Then open the second fasteners and third fasteners on the adjacent first injection units, and simultaneously remove one set of first injection units and third injection units, until all the first injection units are removed in sequence. f. Finally, open the first fastener and remove the upper mold.

2. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: In step S2 process a, the T-shaped block and the T-shaped groove are located on two adjacent sides of the first injection molding unit.

3. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: The thickness of the second injection-molded monomer in step S2c is the thickness of the engineering plastic layer during the second injection.

4. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: The thickness of the pressure plate in step S3 process a is the thickness of the engineering plastic layer during the second injection molding.

5. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: In step S3, the arc-shaped block is located at the bottom of the first injection molding unit near the corner, and the outer edge of the arc-shaped block matches the limiting hole in the lower mold.

6. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: In steps S4 and S5, the injection temperature of the first molten elastomer material is 400°C, and the injection temperature of the second molten elastomer material is 300°C.

7. The method for manufacturing a plum blossom-shaped liquid pump stator according to claim 1, characterized in that: In step S5, the third injection molding monomer is distributed along the outer side of the first injection molding monomer, and at least two of the third injection molding monomers are spliced ​​together to form a closed structure.

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