CN117734064A - Manufacturing process of scroll liquid pump stator - Google Patents
Manufacturing process of scroll liquid pump stator Download PDFInfo
- Publication number
- CN117734064A CN117734064A CN202311674331.9A CN202311674331A CN117734064A CN 117734064 A CN117734064 A CN 117734064A CN 202311674331 A CN202311674331 A CN 202311674331A CN 117734064 A CN117734064 A CN 117734064A
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- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 claims abstract description 129
- 229920006351 engineering plastic Polymers 0.000 claims abstract description 55
- 238000012545 processing Methods 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 239000000178 monomer Substances 0.000 claims description 52
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The invention discloses a manufacturing process of a scroll liquid pump stator, which comprises the following steps: s1, processing an upper die and a cover plate, S2, processing a primary injection molding shell, S3, processing a lower die, S4, processing and forming a metal body, S5, primary injection molding of an engineering plastic layer, and S6, and secondary injection molding of the engineering plastic layer. The injection molding method disclosed by the invention has simple steps, can realize the secondary injection molding of the engineering plastic layer on the surface of the scroll liquid pump stator, prevents falling off when the engineering plastic layer is subjected to injection molding and demolding, improves the adhesive strength and stability between the engineering plastic layer and the metal body, is beneficial to reducing the friction and abrasion between the rotor and the stator when the scroll liquid pump works, improves the processing quality of the stator, and prolongs the service life of the scroll liquid pump.
Description
Technical Field
The invention relates to the technical field of liquid pumps, in particular to a manufacturing process of a scroll liquid pump stator.
Background
Data centers are burdened with increasingly complex task processing, with increasing application loads putting unlimited stress on the data centers, and conventional data centers include a plurality of individual computing resources contained within a shell structure. Data centers or other physical spaces benefit from a sufficient and optimized power and cooling infrastructure. Maintaining the data center at a desired temperature helps prevent computer hardware (e.g., IT infrastructure) from overheating and failing. For this reason, many data centers are cooled to relatively low temperatures to improve equipment reliability and service life, and to avoid downtime for repair and/or replacement.
The data center cooling system acts as a heat dissipation pressure which is difficult to release by the data center, and the cooling tower uses water as a circulating coolant to reduce the temperature of the data center. The data center may be cooled by a cooling tower and the waste heat is vented to the atmosphere.
In the field of refrigerant transportation, a volumetric pump, a rotor pump or a centrifugal pump is conventionally used for refrigerant transportation. When the conventional pumping equipment is operated, metal powder on the surface of a part can fall off due to abrasion of moving parts, and the motor is burnt. Meanwhile, conventional pumps require a medium of lubricating oil or lubricant at the time of operation for reducing wear of the pump.
By adding the engineering plastic layer on the outer side surface of the scroll liquid pump stator, not only the abrasion of the stator can be reduced, but also the motor burning caused by the falling of metal powder can be prevented. However, the existing engineering plastic layer cannot be effectively adhered to the inner surface of the stator, so that abrasion between the rotor and the stator is caused when the scroll pump works, and the normal work of the scroll pump is affected.
Disclosure of Invention
The invention aims to provide a technical scheme of a manufacturing process of a scroll liquid pump stator aiming at the defects of the prior art, and the injection molding method is simple in steps, can realize the secondary injection molding of an engineering plastic layer on the surface of the scroll liquid pump stator, prevents falling off when the engineering plastic layer is subjected to injection molding and demolding, improves the adhesive strength and stability between the engineering plastic layer and a metal body, is beneficial to reducing the friction and abrasion between a rotor and the stator when the scroll liquid pump works, improves the processing quality of the stator and prolongs the service life of the scroll liquid pump.
In order to solve the technical problems, the invention adopts the following technical scheme:
the manufacturing process of the scroll liquid pump stator is characterized by comprising the following steps of:
s1, processing an upper die and a cover plate
a. Firstly, determining the shape of an upper die according to the structure of a stator, determining the number of injection monomers, processing the corresponding number of injection monomers, and forming a secondary scroll forming cavity on each injection monomer, so that the secondary scroll forming cavities are ensured to be communicated with each other when the injection monomers are spliced;
b. then, installing an injection molding pipe at the top of each injection molding monomer, enabling the injection molding pipe to be communicated with a secondary scroll molding cavity, facilitating secondary molding of an engineering plastic layer on the surface of the stator, and vertically installing a first installation block at a position, close to the outer edge, of the top surface of each injection molding monomer;
c. then processing the cover plate according to design requirements, vertically forming a through groove on the cover plate, penetrating the top surface and the bottom surface of the cover plate by the through groove, and integrally forming positioning blocks along the inner wall of the through groove, so that a first arc-shaped groove and a second arc-shaped groove are formed between two adjacent positioning blocks;
d. finally, a second lug plate is integrally formed along the outer circumferential side surface of the cover plate, a flange cover and an annular strip are integrally formed at the bottom of the cover plate, the flange cover is positioned between the annular strip and the cover plate, and a second mounting block is mounted along the top surface of the cover plate;
s2, processing of one-time injection molding shell
a. Firstly, determining the size of a primary injection molding shell according to the size of an upper die, dividing the primary injection molding shell according to the number of injection molding monomers, and integrally processing to form a bottom plate, a first scroll forming plate, a second scroll forming plate, a first arc strip and a second arc strip, wherein the first scroll forming plate is positioned at the inner side of the second scroll forming plate, and the first arc strip and the second arc strip are outwards bent along the top of the second scroll forming plate;
b. then, according to the position of the injection molding pipe, injection molding holes are formed in each of the first arc-shaped strip and the second arc-shaped strip, so that the injection molding holes are aligned with the injection molding pipe conveniently;
s3, machining a lower die
a. Firstly, determining the size of a lower die according to the sizes of a cover plate and an upper die, processing the corresponding lower die, arranging a placing cavity along the inner side of the lower die, arranging a flange groove along the top of the placing cavity, and matching the flange groove with a flange cover;
b. then, the first ear plates are annularly arranged along the outer circumferential side surface of the lower die, so that the first ear plates and the second ear plates are in one-to-one correspondence;
s4, machining and forming the metal body
Determining the size of a metal body according to the design requirement of a stator, forming a required pump body, a flange and a scroll bar through integral casting molding, wherein the flange is arranged on the opening side of the pump body, the scroll bar is arranged in the pump body, a first convex bar, a second convex bar and an inlet runner are integrally formed in the pump body, a liquid inlet channel is formed between the adjacent first convex bar and the second convex bar and between the adjacent two second convex bars, a compression cavity is formed between the scroll bar and the pump body, a liquid outlet hole and a bearing hole are formed at the end part of the pump body, the inlet runner is communicated with the liquid outlet hole through the liquid inlet channel by the compression cavity, and grooves are formed on the inner side surface of the pump body, the scroll bar, the outer side surfaces of the first convex bar and the second convex bar;
s5, one-step injection molding of engineering plastic layer
a. Firstly, placing the processed metal body in a placing cavity of a lower die, and enabling one side with a flange to face upwards, wherein the flange is limited in a flange groove;
b. then fixedly mounting the primary injection molding shell on each injection molding monomer, splicing the injection molding monomers to form an upper die, inserting the upper die into a through groove of a cover plate, and connecting a first mounting block with a second mounting block through a first fastener to realize the fixed connection of the upper die and the cover plate;
c. then covering the cover plate on a lower die, fixedly connecting the first ear plate and the second ear plate through a second fastener, filling molten elastomer material into a gap between the primary injection molding shell and the metal body through an injection molding pipe, and forming a first engineering plastic layer at the injection molding temperature of 400 ℃;
d. after the first engineering plastic layer reaches the set strength, a first fastener between the upper die and the cover plate is opened, corresponding injection molding monomers are taken out, then adjacent injection molding monomers are sequentially taken down until all demolding is completed, the primary injection molding shell on each injection molding monomer is removed, and finally the cover plate is removed;
s6, engineering plastic layer secondary injection molding
a. Firstly, splicing injection molding monomers, inserting the injection molding monomers into a through groove of a cover plate, and connecting a first mounting block with a second mounting block through a first fastener to realize the fixed connection between an upper die and the cover plate;
b. then, the cover plate is arranged on the top surface of the lower die, the first ear plate and the second ear plate are fixedly connected through a second fastener, a gap between the upper die and the first engineering plastic layer is filled with molten elastomer material through an injection molding pipe, and the injection molding temperature is 300 ℃, so that a second engineering plastic layer is formed;
c. after the second engineering plastic layer reaches the set strength, a first fastener between the upper die and the cover plate is opened, the corresponding injection molding monomer is taken out, then the adjacent injection molding monomers are sequentially taken down until all demolding is completed, and finally the cover plate is removed, and the stator is taken out.
The injection molding method has simple steps, can realize the secondary injection molding of the engineering plastic layer on the surface of the scroll liquid pump stator, prevents falling off when the engineering plastic layer is subjected to injection molding and demolding, improves the adhesive strength and stability between the engineering plastic layer and the metal body, is beneficial to reducing the friction and abrasion between the rotor and the stator when the scroll liquid pump works, improves the processing quality of the stator, and prolongs the service life of the scroll liquid pump.
Further, in the step S2, the inside of the first scroll forming plate in the process a is hollow, a primary scroll forming cavity is formed, the first scroll forming plate and the second scroll forming plate are matched with the secondary scroll forming cavity, the quality of primary injection molding and secondary injection molding of the engineering plastic layer is improved, and the processing quality of the stator is ensured.
Further, the first arc-shaped strip and the second arc-shaped strip in the step S2 process a are matched with the first arc-shaped groove and the second arc-shaped groove respectively, so that the installation and the disassembly of the primary injection molding shell are facilitated, and meanwhile, the secondary injection molding of the engineering plastic layers on the first raised strips and the second raised strips can be met.
Further, the first arc strip and the second arc strip in step S2 process a are connected to the upper die through a fixing mechanism, the fixing mechanism comprises a fixing block and a connecting piece, the fixing block is arranged on the top surfaces of the first arc strip and the second arc strip, the connecting piece penetrates through an injection molding monomer to be connected with the fixing block, the fixed connection between the primary injection molding shell and the upper die is achieved, the connecting piece can adopt a screw, and the first injection molding shell and the upper die can be conveniently installed and detached.
Further, in the step S2, clamping grooves are formed between the adjacent first arc-shaped strips and the adjacent second arc-shaped strips in the process a and between the adjacent two second arc-shaped strips, and the clamping grooves are matched with the positioning blocks, so that the positioning between the cover plate and the metal body is facilitated.
Further, the bottom of placing the chamber in step S3 process a is equipped with reference column and card strip, and the reference column is located center department, and the card strip is annular distribution as the center with the reference column, is convenient for fix a position bearing hole and play liquid hole on the pump body, prevents to take place to remove at the in-process of moulding plastics metal body.
Further, be connected through stop gear between apron and the bed die, stop gear includes stopper and spacing groove, and the bottom edge of apron is fixed in to the stopper, and the top surface edge of bed die is located to the spacing groove, stopper and spacing groove phase-match can realize the quick location between apron and the bed die through stopper and spacing groove, the assembly between last mould and the bed die of being convenient for.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the injection molding method has simple steps, can realize the secondary injection molding of the engineering plastic layer on the surface of the scroll liquid pump stator, prevents falling off when the engineering plastic layer is subjected to injection molding and demolding, improves the adhesive strength and stability between the engineering plastic layer and the metal body, is beneficial to reducing the friction and abrasion between the rotor and the stator when the scroll liquid pump works, improves the processing quality of the stator, and prolongs the service life of the scroll liquid pump.
2. The first arc-shaped strip and the second arc-shaped strip are matched with each other in the first arc-shaped groove and the second arc-shaped groove respectively, so that the installation and the disassembly of the one-time injection molding shell are facilitated, and meanwhile, the secondary injection molding of the engineering plastic layer on the first convex strip and the second convex strip can be met.
3. The cover plate and the lower die can be rapidly positioned through the limiting block and the limiting groove, and assembly between the upper die and the lower die is facilitated.
Description of the drawings:
the invention is further described below with reference to the accompanying drawings:
FIG. 1 is a flow chart of a process for manufacturing a scroll pump stator according to the present invention;
FIG. 2 is a schematic diagram of the connection between the upper and lower molds and the cover plate in the present invention;
FIG. 3 is a schematic view of the structure of the lower mold of the present invention;
FIG. 4 is a schematic illustration of the connection between the upper mold, cover plate and primary injection molded housing of the present invention;
FIG. 5 is a schematic view of the structure of the direction A in FIG. 4;
FIG. 6 is a schematic view of a cover plate according to the present invention;
FIG. 7 is a schematic view of a primary injection molded housing according to the present invention;
FIG. 8 is an effect diagram of a stator according to the present invention;
FIG. 9 is a schematic view of the structure in the direction B in FIG. 8;
fig. 10 is a cross-sectional view of a stator in the present invention.
In the figure: 1-a lower die; 101-placing a cavity; 102-a flange groove; 103-a limit groove; 104-positioning columns; 105-clamping strips;
2-cover plate; 201-limiting blocks; 202-a flange cover; 203-annular strips; 204-positioning blocks; 205-through slots; 206-a first arc-shaped groove; 207-a second arcuate slot;
3-upper die; 301-injection molding monomer; 302-injection molding a tube; 303-a connector;
401-a first mounting block; 402-a second mounting block; 403-a first fastener;
501-a first ear plate; 502-a second ear plate; 503-a second fastener;
6-one-time injection molding of the shell; 601-a bottom plate; 602-a first scroll forming plate; 603-a second scroll forming plate; 604-a first arcuate bar; 605-a second arcuate bar; 606-injection molding holes; 607-a fixed block; 608-a clamping groove;
7-one-time scroll forming cavity;
801-inlet flow channel; 802-scroll bar; 803-first ridge; 804-a liquid inlet channel; 805-a liquid outlet hole; 806-bearing holes; 807-flange; 808-second ridge; 809-pump body; 810-an engineering plastic layer; 811-grooves.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The scroll pump stator of the present invention, as shown in fig. 8 to 10, comprises a pump body 809, a flange 807 and scroll strips 802 which are integrally formed, wherein the flange 807 is provided on the opening side of the pump body 809, the scroll strips 802 are fixed in the pump body 809, a bearing hole 806 and a liquid outlet hole 805 are provided at the bottom center of the pump body 809, and the liquid outlet hole 805 is distributed in a ring shape with the bearing hole 806 as the center.
The pump body 809 is interior integrated into one piece has first sand grip 803 and second sand grip 808, form the import runner 801 between first sand grip 803, second sand grip 808 and the flange 807, pump body 809, flange 807, scroll strip 802, first sand grip 803 and second sand grip 808 all include the metal body, wherein the inner wall of pump body 809, the outer wall of scroll strip 802, the surface of first sand grip 803 and second sand grip 808 all is equipped with slot 811, engineering plastic layer 810 passes through slot 811 parcel in the inner wall of pump body 809, the outer wall of scroll strip 802, the surface of first sand grip 803 and second sand grip 808 for reduce the friction and wear between rotor during operation and the stator, extension scroll pump's life. Liquid inlet channels 804 are respectively arranged between the first raised strips 803 and the second raised strips 808 and between two adjacent second raised strips 808, and the inlet flow channels 801 are communicated with the liquid outlet holes 805 through the liquid inlet channels 804.
The thickness of the engineering plastic layer 810 is 2-4 mm, the metal body is preferably made of aluminum alloy, and meanwhile, the engineering plastic layer 810 is not installed on the sleeve, so that the installation stability of the engineering plastic layer 810 is improved, and the engineering plastic layer 810 is not easy to fall off.
The engineering plastic layer 810 is made of an elastomer material, wherein the elastomer material can be selected from rubber, polyether-ether-ketone (peek) and the like, preferably polyether-ether-ketone (peek), is non-conductive, has good affinity, can not damage a motor even if worn, can be run dry, and can meet the requirement of dry running because the refrigerant in a cooling system is easy to volatilize and volatilize to generate gas.
As shown in fig. 1 to 7, the manufacturing process of the scroll pump stator of the present invention comprises the following steps:
s1, processing an upper die 3 and a cover plate 2
a. Firstly, determining the shape of an upper die 3 according to the structure of a stator, determining the number of injection monomers 301, processing the corresponding number of injection monomers 301, and forming a secondary scroll forming cavity on each injection monomer 301, so that the secondary scroll forming cavities are mutually communicated when the injection monomers 301 are spliced;
b. then, installing an injection molding pipe 302 on the top of each injection molding monomer 301, enabling the injection molding pipe 302 to be communicated with a secondary scroll molding cavity, facilitating secondary molding of an engineering plastic layer 810 on the surface of the stator, and vertically installing a first installation block 401 at a position, close to the outer edge, of the top surface of each injection molding monomer 301;
c. then processing the cover plate 2 according to design requirements, vertically forming a through groove 205 on the cover plate 2, wherein the through groove 205 penetrates through the top surface and the bottom surface of the cover plate 2, and positioning blocks 204 are integrally formed along the inner wall of the through groove 205, so that a first arc-shaped groove 206 and a second arc-shaped groove 207 are formed between two adjacent positioning blocks 204;
d. finally, a second lug 502 is integrally formed along the outer circumferential side surface of the cover plate 2, meanwhile, a flange cover 202 and an annular strip 203 are integrally formed at the bottom of the cover plate 2, the flange cover 202 is positioned between the annular strip 203 and the cover plate 2, and a second mounting block 402 is mounted along the top surface of the cover plate 2;
s2, processing the one-time injection molding shell 6
a. Firstly, determining the size of a primary injection molding shell 6 according to the size of an upper mold 3, dividing the primary injection molding shell 6 according to the number of injection molding monomers 301, and integrally processing to form a bottom plate 601, a first scroll forming plate 602, a second scroll forming plate 603, a first arc-shaped strip 604 and a second arc-shaped strip 605, wherein the first scroll forming plate 602 is positioned at the inner side of the second scroll forming plate 603, and the first arc-shaped strip 604 and the second arc-shaped strip 605 are outwards bent along the top of the second scroll forming plate 603;
the first scroll forming plate 602 is hollow, a first scroll forming cavity 7 is formed, the first scroll forming plate 602 and the second scroll forming plate 603 are matched with the second scroll forming cavity, the quality of primary injection molding and secondary injection molding of the engineering plastic layer 810 is improved, and the processing quality of the stator is guaranteed.
The first arc-shaped strip 604 and the second arc-shaped strip 605 are respectively matched with the first arc-shaped groove 206 and the second arc-shaped groove 207, so that the installation and the disassembly of the primary injection molding shell 6 are facilitated, and meanwhile, the secondary injection molding of the engineering plastic layer 810 on the first convex strip 803 and the second convex strip 808 can be satisfied.
The first arc strip 604 and the second arc strip 605 are connected to the upper die 3 through a fixing mechanism, the fixing mechanism comprises a fixing block 607 and a connecting piece 303, the fixing block 607 is arranged on the top surfaces of the first arc strip 604 and the second arc strip 605, the connecting piece 303 penetrates through the injection molding monomer 301 to be connected with the fixing block 607, the fixed connection between the primary injection molding shell 6 and the upper die 3 is realized, the connecting piece 303 can adopt screws, and the first injection molding shell and the upper die 3 can be conveniently assembled and disassembled.
And a clamping groove 608 is formed between the adjacent first arc-shaped strip 604 and the adjacent second arc-shaped strip 605 and between the adjacent two second arc-shaped strips 605, and the clamping groove 608 is matched with the positioning block 204, so that the positioning between the cover plate 2 and the metal body is facilitated.
b. Then, according to the position of the injection molding pipe 302, injection molding holes 606 are formed in each of the first arc-shaped strip 604 and the second arc-shaped strip 605, so that the injection molding holes 606 are aligned with the injection molding pipe 302;
s3, machining the lower die 1
a. Firstly, determining the size of a lower die 1 according to the sizes of a cover plate 2 and an upper die 3, processing the corresponding lower die 1, arranging a placing cavity 101 along the inner side of the lower die 1, arranging a flange groove 102 along the top of the placing cavity 101, and matching the flange groove 102 with a flange cover 202; the bottom of the placing cavity 101 is provided with a positioning column 104 and a clamping strip 105, the positioning column 104 is positioned at the center, the clamping strip 105 is distributed in an annular shape with the positioning column 104 as the center, so that a bearing hole 806 and a liquid outlet hole 805 on a pump body 809 are positioned conveniently, and the metal body is prevented from moving in the injection molding process.
b. Then, the first ear plates 501 are annularly arranged along the outer circumferential side surface of the lower die 1, so that the first ear plates 501 are in one-to-one correspondence with the second ear plates 502;
s4, machining and forming the metal body
The size of the metal body is determined according to the design requirement of the stator, a required pump body 809, a flange 807 and a scroll strip 802 are formed through integral casting, the flange 807 is arranged on the opening side of the pump body 809, the scroll strip 802 is arranged in the pump body 809, a first convex strip 803, a second convex strip 808 and an inlet flow channel 801 are integrally formed in the pump body 809, a liquid inlet channel 804 is formed between the adjacent first convex strip 803 and the second convex strip 808 and between the adjacent two second convex strips 808, a compression cavity is formed between the scroll strip 802 and the pump body 809, a liquid outlet hole 805 and a bearing hole 806 are formed at the end part of the pump body 809, the inlet flow channel 801 is communicated with the liquid outlet hole 805 through the liquid inlet channel 804 by the compression cavity, and grooves 811 are formed in the inner side surface of the pump body 809, the scroll strip 802 and the outer side surfaces of the first convex strip 803 and the second convex strip 808;
s5, one-time injection molding of engineering plastic layer 810
a. Firstly, placing the processed metal body in a placing cavity 101 of a lower die 1, enabling one side with a flange 807 to face upwards, and limiting the flange 807 in a flange groove 102;
b. then, fixedly mounting the primary injection molding shell 6 on each injection molding monomer 301, splicing the injection molding monomers 301 to form an upper die 3, inserting the upper die into the through groove 205 of the cover plate 2, and connecting the first mounting block 401 with the second mounting block 402 through the first fastener 403 to realize the fixed connection of the upper die 3 and the cover plate 2;
c. then, the cover plate 2 is covered on the lower die 1, the first ear plate 501 and the second ear plate 502 are fixedly connected through the second fastening piece 503, molten elastomer material is filled in a gap between the primary injection molding shell 6 and the metal body through the injection molding pipe 302, and the injection molding temperature is 400 ℃, so that a first engineering plastic layer 810 is formed;
the cover plate 2 is connected with the lower die 1 through a limiting mechanism, the limiting mechanism comprises a limiting block 201 and a limiting groove 103, the limiting block 201 is fixed on the bottom edge of the cover plate 2, the limiting groove 103 is arranged on the top surface edge of the lower die 1, the limiting block 201 is matched with the limiting groove 103, the cover plate 2 and the lower die 1 can be rapidly positioned through the limiting block 201 and the limiting groove 103, and assembly between the upper die 3 and the lower die 1 is facilitated.
d. After the first engineering plastic layer 810 reaches the set strength, opening a first fastener 403 between the upper die 3 and the cover plate 2, taking out the corresponding injection molding monomers 301, sequentially taking down the adjacent injection molding monomers 301 until the complete demolding is achieved, removing the primary injection molding shells 6 on each injection molding monomer 301, and finally removing the cover plate 2;
s6, engineering plastic layer 810 secondary injection molding
a. Firstly, splicing injection molding monomers 301, inserting the injection molding monomers into a through groove 205 of a cover plate 2, and connecting a first mounting block 401 with a second mounting block 402 through a first fastener 403 to realize the fixed connection of an upper die 3 and the cover plate 2;
b. then, the cover plate 2 is arranged on the top surface of the lower die 1, the first ear plate 501 and the second ear plate 502 are fixedly connected through a second fastening piece 503, a gap between the upper die 3 and the first engineering plastic layer 810 is filled with molten elastomer material through an injection molding pipe 302, and the injection molding temperature is 300 ℃, so that the second engineering plastic layer 810 is formed;
c. after the second engineering plastic layer 810 reaches the set strength, a first fastener 403 between the upper die 3 and the cover plate 2 is opened, the corresponding injection molding monomer 301 is taken out, then the adjacent injection molding monomers 301 are sequentially taken down until all demolding is completed, and finally the cover plate 2 is removed, and the stator is taken out.
The injection molding method has simple steps, can realize the secondary injection molding of the engineering plastic layer 810 on the surface of the scroll liquid pump stator, prevents falling off when the engineering plastic layer 810 is subjected to injection molding and demolding, improves the adhesive strength and stability between the engineering plastic layer 810 and the metal body, is beneficial to reducing the friction and abrasion between the rotor and the stator when the scroll liquid pump works, improves the processing quality of the stator, and prolongs the service life of the scroll liquid pump.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to achieve substantially the same technical effects are included in the scope of the present invention.
Claims (7)
1. The manufacturing process of the scroll liquid pump stator is characterized by comprising the following steps of:
s1, processing an upper die and a cover plate
a. Firstly, determining the shape of an upper die according to the structure of a stator, determining the number of injection monomers, processing the corresponding number of injection monomers, and forming a secondary scroll forming cavity on each injection monomer, so that the secondary scroll forming cavities are ensured to be communicated with each other when the injection monomers are spliced;
b. then, installing an injection molding pipe at the top of each injection molding monomer, enabling the injection molding pipe to be communicated with a secondary scroll molding cavity, facilitating secondary molding of an engineering plastic layer on the surface of the stator, and vertically installing a first installation block at a position, close to the outer edge, of the top surface of each injection molding monomer;
c. then processing the cover plate according to design requirements, vertically forming a through groove on the cover plate, penetrating the top surface and the bottom surface of the cover plate by the through groove, and integrally forming positioning blocks along the inner wall of the through groove, so that a first arc-shaped groove and a second arc-shaped groove are formed between two adjacent positioning blocks;
d. finally, a second lug plate is integrally formed along the outer circumferential side surface of the cover plate, a flange cover and an annular strip are integrally formed at the bottom of the cover plate, the flange cover is positioned between the annular strip and the cover plate, and a second mounting block is mounted along the top surface of the cover plate;
s2, processing of one-time injection molding shell
a. Firstly, determining the size of a primary injection molding shell according to the size of an upper die, dividing the primary injection molding shell according to the number of injection molding monomers, and integrally processing to form a bottom plate, a first scroll forming plate, a second scroll forming plate, a first arc strip and a second arc strip, wherein the first scroll forming plate is positioned at the inner side of the second scroll forming plate, and the first arc strip and the second arc strip are outwards bent along the top of the second scroll forming plate;
b. then, according to the position of the injection molding pipe, injection molding holes are formed in each of the first arc-shaped strip and the second arc-shaped strip, so that the injection molding holes are aligned with the injection molding pipe conveniently;
s3, machining a lower die
a. Firstly, determining the size of a lower die according to the sizes of a cover plate and an upper die, processing the corresponding lower die, arranging a placing cavity along the inner side of the lower die, arranging a flange groove along the top of the placing cavity, and matching the flange groove with a flange cover;
b. then, the first ear plates are annularly arranged along the outer circumferential side surface of the lower die, so that the first ear plates and the second ear plates are in one-to-one correspondence;
s4, machining and forming the metal body
Determining the size of a metal body according to the design requirement of a stator, forming a required pump body, a flange and a scroll bar through integral casting molding, wherein the flange is arranged on the opening side of the pump body, the scroll bar is arranged in the pump body, a first convex bar, a second convex bar and an inlet runner are integrally formed in the pump body, a liquid inlet channel is formed between the adjacent first convex bar and the second convex bar and between the adjacent two second convex bars, a compression cavity is formed between the scroll bar and the pump body, a liquid outlet hole and a bearing hole are formed at the end part of the pump body, the inlet runner is communicated with the liquid outlet hole through the liquid inlet channel by the compression cavity, and grooves are formed on the inner side surface of the pump body, the scroll bar, the outer side surfaces of the first convex bar and the second convex bar;
s5, one-step injection molding of engineering plastic layer
a. Firstly, placing the processed metal body in a placing cavity of a lower die, and enabling one side with a flange to face upwards, wherein the flange is limited in a flange groove;
b. then fixedly mounting the primary injection molding shell on each injection molding monomer, splicing the injection molding monomers to form an upper die, inserting the upper die into a through groove of a cover plate, and connecting a first mounting block with a second mounting block through a first fastener to realize the fixed connection of the upper die and the cover plate;
c. then covering the cover plate on a lower die, fixedly connecting the first ear plate and the second ear plate through a second fastener, filling molten elastomer material into a gap between the primary injection molding shell and the metal body through an injection molding pipe, and forming a first engineering plastic layer at the injection molding temperature of 400 ℃;
d. after the first engineering plastic layer reaches the set strength, a first fastener between the upper die and the cover plate is opened, corresponding injection molding monomers are taken out, then adjacent injection molding monomers are sequentially taken down until all demolding is completed, the primary injection molding shell on each injection molding monomer is removed, and finally the cover plate is removed;
s6, engineering plastic layer secondary injection molding
a. Firstly, splicing injection molding monomers, inserting the injection molding monomers into a through groove of a cover plate, and connecting a first mounting block with a second mounting block through a first fastener to realize the fixed connection between an upper die and the cover plate;
b. then the cover plate is arranged on the top surface of the lower die, the first ear plate and the second ear plate are fixedly connected through a second fastener, and a gap between the upper die and the first engineering plastic layer is formed through an injection molding pipe
Filling molten elastomer material in the plastic material, and forming a second engineering plastic layer at the injection molding temperature of 300 ℃;
c. after the second engineering plastic layer reaches the set strength, a first fastener between the upper die and the cover plate is opened, the corresponding injection molding monomer is taken out, then the adjacent injection molding monomers are sequentially taken down until all demolding is completed, and finally the cover plate is removed, and the stator is taken out.
2. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: in the step S2, the first scroll forming plate is hollow and forms a primary scroll forming cavity, and the first scroll forming plate and the second scroll forming plate are matched with the secondary scroll forming cavity.
3. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: the first arc-shaped strip and the second arc-shaped strip in the step S2 are matched with the first arc-shaped groove and the second arc-shaped groove respectively.
4. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: step S2 in the process a first arc strip with the second arc strip pass through fixed establishment connect in go up the mould, fixed establishment includes fixed block and connecting piece, the fixed block is located first arc strip with on the top surface of second arc strip, the connecting piece passes the monomer of moulding plastics is connected the fixed block realizes once mould plastics the casing with go up fixed connection between the mould.
5. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: and step S2, clamping grooves are formed between the adjacent first arc-shaped strips and the adjacent second arc-shaped strips in the process a, and the clamping grooves are matched with the positioning blocks.
6. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: and in the step S3, a positioning column and clamping strips are arranged at the bottom of the placing cavity in the process a, the positioning column is positioned at the center, and the clamping strips are distributed in an annular shape by taking the positioning column as the center.
7. The manufacturing process of the scroll liquid pump stator according to claim 1, wherein: the cover plate is connected with the lower die through a limiting mechanism, the limiting mechanism comprises a limiting block and a limiting groove, the limiting block is fixed on the bottom edge of the cover plate, the limiting groove is formed in the top surface edge of the lower die, and the limiting block is matched with the limiting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674331.9A CN117734064A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of scroll liquid pump stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674331.9A CN117734064A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of scroll liquid pump stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734064A true CN117734064A (en) | 2024-03-22 |
Family
ID=90250051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311674331.9A Pending CN117734064A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of scroll liquid pump stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734064A (en) |
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2023
- 2023-12-07 CN CN202311674331.9A patent/CN117734064A/en active Pending
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