CN117754820A - Manufacturing process of plum blossom liquid pump rotor - Google Patents
Manufacturing process of plum blossom liquid pump rotor Download PDFInfo
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- CN117754820A CN117754820A CN202311679629.9A CN202311679629A CN117754820A CN 117754820 A CN117754820 A CN 117754820A CN 202311679629 A CN202311679629 A CN 202311679629A CN 117754820 A CN117754820 A CN 117754820A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 238000001746 injection moulding Methods 0.000 claims abstract description 58
- 229920006351 engineering plastic Polymers 0.000 claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a manufacturing process of a plum blossom liquid pump rotor, which comprises the following steps: s1, machining a lower die disc, S2, machining and assembling an upper die monomer, S3, casting a metal body, S4, performing one-time injection molding on an engineering plastic layer, and S5, performing secondary injection molding on the engineering plastic layer. The manufacturing process adopts the inner and outer dies and performs injection molding in a splicing mode, which is beneficial to the secondary injection molding of the engineering plastic layer, improves the deformation of the engineering plastic layer, and is beneficial to the demoulding of the whole rotor and improves the processing quality of the rotor.
Description
Technical Field
The invention relates to the technical field of liquid pumps, in particular to a manufacturing process of a quincuncial liquid pump rotor.
Background
In the field of refrigerant transport, volumetric pumps, rotor pumps or centrifugal pumps are traditionally used for refrigerant transport. 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 when running.
Computer servers, network devices, and other equipment in a data center generate heat when in 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 and if the components are not sufficiently cooled, its operating efficiency may be affected. Data centers are typically organized into rows of racks containing heat-generating electronic equipment. Heat can significantly reduce the performance of a data center. Such as slow request processing, high energy consumption, and premature component failure.
However, in data center cooling systems, there is a risk that the medium, such as lubricating oil or lubricant, used by the pumping equipment will flow into the system through the cooling channels. Thus, the data center cooling system is in an oil-free state; and the friction pair in the pumping equipment is worn without lubrication, so that the working efficiency and the service life of the cooling system are affected.
In the prior art, when the rotor of the liquid pump is subjected to injection molding, an engineering plastic layer is generally formed by adopting a one-step injection molding process, the common engineering plastic injection molding layer can shrink after being cooled, deformation is easy to occur, meanwhile, the engineering plastic layer is easy to fall off due to defects of structural design, the processing quality and the service life of the rotor are affected, and further the friction and the abrasion of the liquid pump during working are affected.
Disclosure of Invention
The invention aims to provide a technical scheme of a manufacturing process of a plum blossom liquid pump rotor, which aims at overcoming the defects of the prior art, wherein the manufacturing process adopts an inner die and an outer die and performs injection molding in a splicing mode, thereby being beneficial to secondary injection molding of an engineering plastic layer, improving the deformation of the engineering plastic layer, facilitating demoulding of the whole rotor and improving the processing quality of the rotor.
In order to solve the technical problems, the invention adopts the following technical scheme:
the manufacturing process of the plum blossom liquid pump rotor is characterized by comprising the following steps of:
s1, machining a lower die disc
a. Firstly, determining the size of a lower die disc according to the size of a rotor, processing the lower die disc with the corresponding size, and polishing the inner side surface of the lower die disc;
b. then installing a positioning block in the lower die disc according to the positions of the positioning hole and the bearing hole on the rotor, so that a positioning groove is formed between the positioning block and the lower die disc;
c. uniformly mounting at least two sliding rails along the outer circumferential side surface of the lower die disc, determining the size of the sliding blocks according to design requirements, processing corresponding sliding blocks, sleeving the sliding blocks on each sliding rail, and simultaneously mounting a first baffle and a second baffle along two ends of each sliding rail respectively, wherein the size of the second baffle is larger than that of the first baffle, and is used for limiting the sliding blocks;
s2, machining and assembling upper die single body
a. Firstly, determining the number of upper die monomers according to the size of a rotor, wherein each upper die monomer consists of an upper inner die and an upper outer die and is used for secondary injection molding of an engineering plastic layer on the rotor;
b. then, an upper die is determined according to the shape and the size of the metal body, a corresponding second die shell and a second die cover are processed, injection holes are formed along the top surface of the second die shell, the second die shell and the second die cover are integrally processed and molded, and the surfaces of the second die shell and the second die cover are polished;
c. then, an upper outer die is determined according to the shape and the size of the rotor, a corresponding first die shell, a first die cover and a baffle ring are processed, the first die shell protrudes upwards along the first die cover, the baffle ring protrudes downwards along the outer edge of the first die cover, the inner side surfaces of the first die shell, the first die cover and the baffle ring are polished, an injection molding interface tube and an assembly block are arranged along the first die shell, and an arc-shaped groove is formed in the assembly block;
d. installing a fastening block along the edge of the joint of the top surface of the first die cover, determining the size of the buckle plate according to the moving position of the sliding block, processing the corresponding buckle plate, polishing the outer side surface of the buckle plate, and fixedly installing the buckle plate on the outer side of the baffle ring through an L-shaped bracket;
e. finally, the processed upper inner die is arranged on the inner side of the upper outer die and is fixed;
s3, casting the metal body
Determining the size of the metal body according to the design requirement of the rotor, forming a required rotary table and a rotary part through integral casting, and fixing the rotary part on the rotary table in a plum blossom shape; the rotary table is provided with a bearing hole, a stop block is arranged in the rotary part, a high-pressure area is formed at the end part of the rotary part, the rotary part is provided with at least one drainage hole and at least one concave hole, the drainage hole is communicated with the high-pressure area and the annular groove, and the concave hole is arranged at the end part of the rotary part;
s4, one-step injection molding of engineering plastic layer
a. Firstly, placing the processed metal body in a lower die disc for positioning, so that one side with a positioning hole and a bearing hole faces downwards, and a rotating part faces upwards;
b. then, selecting a corresponding number of upper die monomers according to the plum blossom-shaped rotating parts, splicing the upper die monomers into a plum blossom-shaped structure, penetrating two adjacent fastening blocks through fastening bolts to realize the fixed connection between the adjacent upper die monomers, and simultaneously, fixedly connecting all the assembly blocks through fastening rings;
c. then, the spliced upper die units are arranged on the lower die plate, one end of a buckle plate on the outer side of each upper die unit props against the second baffle plate, and each sliding block is moved to lock the buckle plate;
d. finally, injecting the elastomer material in a molten state between an upper inner die and a metal body through an injection molding interface pipe to form a first engineering plastic layer, wherein the injection molding temperature is 400-450 ℃, and the injection molding thickness is 2.5-3 mm;
e. after the first engineering plastic layer reaches the set strength, opening the sliding blocks, taking down the upper die monomers one by one, dismantling the upper inner die and reserving the upper outer die;
s5, engineering plastic layer secondary injection molding
a. Firstly, an upper outer mold is arranged on a lower mold disc, one end of a pinch plate at the outer side of each upper outer mold props against a second baffle plate, and each slide block is moved to lock the pinch plate;
b. then injecting the elastomer material in the molten state between the upper outer die and the first engineering plastic layer through an injection molding interface pipe to form a second engineering plastic layer, wherein the injection molding temperature is 300-350 ℃, and the injection molding thickness is 0.5-1 mm;
c. and after the second engineering plastic layer reaches the set strength, opening the sliding blocks, and taking down the upper outer dies one by one to realize demoulding so as to form the required rotor.
The manufacturing process adopts the inner and outer dies and performs injection molding in a splicing mode, so that the secondary injection molding of the engineering plastic layer is facilitated, the deformation of the engineering plastic layer is improved, the demolding of the whole rotor is facilitated, and the processing quality of the rotor is improved.
Further, in the step S1 process c, a first limiting strip is arranged along the outer edges of the top surface and the bottom surface of the sliding rail, a first supporting strip and a second supporting strip which are mutually parallel are integrally formed on the inner side surface of the sliding block, a guide groove is formed between the first supporting strip and the second supporting strip in a matched mode, a second limiting strip is arranged on the first supporting strip and the second supporting strip in a matched mode, the second limiting strip abuts against the first limiting strip, through the design of the first limiting strip and the second limiting strip, the sliding block can slide along the circumference, the assembly precision is improved, meanwhile the outward position of the sliding block can be prevented, and the connection stability is improved.
Further, in the step S1, one end face of the sliding block is provided with a fourth fixing hole, the second baffle is provided with a second fixing hole, the second fixing hole is penetrated by a fastening screw and connected with the fourth fixing hole, the fixed assembly between the sliding block and the second baffle is realized, and the installation and the disassembly between the sliding block and the second baffle are convenient.
Further, in step S2, the inner walls of the second mold shell and the first mold shell are both inclined, the included angle between the inner wall of the second mold shell and the horizontal direction is a, the included angle between the inner wall of the first mold shell and the horizontal direction is b, wherein 70 ° < a=b < 90 °, which is beneficial to demolding during primary injection molding and secondary injection molding, and prevents the engineering plastic layer from deforming.
Further, in the step S2, the second die shell and the first die shell are of plum blossom-shaped structures, so that the second die shell and the first die shell are convenient to cooperate with the rotor, and the injection molding quality of the engineering plastic layer is improved.
Further, the last interior mould in step S2 passes through the fastener to be connected in outer mould, guarantees simultaneously that the interface pipe of moulding plastics communicates with the hole of moulding plastics, and the fastener distributes on first mould shell and first mould lid, and the fastener is convenient for go up the installation dismantlement between interior mould and the last outer mould, moulds plastics interface pipe and the hole of moulding plastics and be favorable to engineering plastics' S one shot forming and overmoulding.
Further, be equipped with the draw-in groove on the slider in step S1, draw-in groove and buckle assorted, the one end of draw-in groove is equipped with the locating plate, and the locating plate supports the buckle, is equipped with the third fixed orifices in the draw-in groove, is equipped with first fixed orifices on the buckle, passes the third fixed orifices through the screw and is connected to first fixed orifices, realizes the fixed connection between buckle and the slider, after slider and buckle cooperation completely, the locating plate can support the tip of buckle, carries out the connection of first fixed orifices and third fixed orifices again, improves the efficiency of installation dismantlement greatly.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the manufacturing process adopts the inner and outer dies and performs injection molding in a splicing mode, so that the secondary injection molding of the engineering plastic layer is facilitated, the deformation of the engineering plastic layer is improved, the demolding of the whole rotor is facilitated, and the processing quality of the rotor is improved.
2. Through the design of first spacing and the spacing of second, guarantee that the slider can follow the circumference and slide, improve assembly accuracy, can prevent simultaneously that the slider from outwards locating, improve the stability of connection.
3. The inner walls of the second mould shell and the first mould shell are obliquely arranged, so that demolding during primary injection molding and secondary injection molding is facilitated, and deformation of the engineering plastic layer is prevented.
Description of the drawings:
the invention is further described below with reference to the accompanying drawings:
fig. 1 is a flow chart of a manufacturing process of a quincuncial liquid pump rotor of the present invention;
FIG. 2 is a schematic view of a mold according to the present invention;
FIG. 3 is a schematic diagram of the structure of the upper die body monomer in the present invention;
FIG. 4 is a schematic view of the structure of the direction A in FIG. 3;
FIG. 5 is a schematic view of the connection between the upper inner mold and the upper outer mold in the present invention;
FIG. 6 is a schematic view of the structure of the lower die plate of the present invention;
FIG. 7 is a schematic view of a slider according to the present invention;
FIG. 8 is an effect diagram of the rotor of 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 rotor in accordance with the present invention.
In the figure: 1-a lower die plate; 101-positioning blocks; 102-positioning grooves;
2-upper die monomers;
3-fastening rings;
4-upper inner mold; 401-a second mold shell; 402-a second mold cover;
5-an upper outer mold; 501-a first mould shell; 502-a first mold cover; 503-a baffle ring; 504-injection molding the interface tube; 505-fasteners; 506-fitting blocks; 507-arc grooves;
601-fastening bolts; 602-fastening blocks;
701-pinch plate; a 702-L shaped bracket; 703-a first fixation hole; 704-a slide rail; 705-first baffle; 706-a second baffle; 707-a second securing aperture; 708-a first limit bar; 709-a slider; 710—a third fixing hole; 711-a first support bar; 712-second support bar; 713-guide slots; 714—a second stop bar; 715-fourth fixation hole; 716-a card slot; 717-positioning plates;
8-a rotor; 801-stop; 802-a rotating part; 803-a turntable; 804 drainage holes; 805-concave holes; 806-pin holes; 807-locating holes; 808-bearing holes; 809-through holes; 810-an engineering plastic layer; 811-a trench; 812-metal body.
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.
As shown in fig. 8 to 10, the rotor 8 of the quincuncial liquid pump of the present invention comprises a turntable 803 and a rotating portion 802, wherein the rotating portion 802 is fixed on the turntable 803 in a quincuncial shape; the turntable 803 is provided with a bearing hole 808. A stopper 801 is provided in the rotating portion 802, and a high-pressure area is formed at the end of the rotating portion 802. The rotor 8 is provided with an annular groove and a pin shaft hole 806, the rotor 8 is provided with a positioning hole 807, the positioning hole 807 is communicated with a through hole 808, in the application, 3 positioning holes 807 and through holes 808 which are distributed in an annular mode are preferably adopted, and a chamfer is arranged on one side of the through hole 808, which is located in the positioning hole 807.
The rotating portion 802 is provided with at least one drainage hole 804 and at least one concave hole 805, the drainage hole 804 is communicated with the high-pressure area and the annular groove, the concave hole 805 is arranged at the end of the rotating portion 802, abrasion of the rotor 8 in the rotating process is reduced, pressure in the high-pressure area can be drained into the annular groove through the drainage hole 804, and the concave hole 805 is used for storing lubricant, so that friction and abrasion are further reduced. The present application preferably employs 6 drainage apertures 804, with each drainage aperture 804 in communication with an annular groove.
The carousel 803 and the portion of rotating 802 all include metal body 812 and engineering plastic layer 810, and engineering plastic layer 810's thickness is 2 ~ 4mm, and the carousel 803 is close to all is equipped with slot 811 on the terminal surface of the portion of rotating 802 and the lateral surface of the portion of rotating 802, and engineering plastic layer 810 passes through slot 811 to be connected in metal body 812, is favorable to wrapping up engineering plastic layer 810 in the surface of carousel 803 and portion of rotating 802 through the design of slot 811, is difficult for droing, prolongs the life of rotor 8, and metal body 812 can adopt the aluminum alloy, can guarantee the intensity of whole rotor 8.
The engineering plastic layer 810 is made of the peek material, the peek material is non-conductive and good in affinity, the motor is not damaged even if worn, meanwhile, the engineering plastic layer can run dry, the refrigerant in the cooling system is easy to volatilize, gas is generated by volatilization, and the gas can run dry, so that the requirement of the running dry can be met.
As shown in fig. 1 to 7, the manufacturing process of the quincuncial liquid pump rotor of the present invention comprises the following steps:
s1, machining a lower die disc 1
a. Firstly, determining the size of a lower die disc 1 according to the size of a rotor, processing the lower die disc 1 with the corresponding size, and polishing the inner side surface of the lower die disc 1;
b. then, a positioning block 101 is arranged in the lower die disc 1 according to the positions of the positioning hole and the bearing hole on the rotor, so that a positioning groove 102 is formed between the positioning block 101 and the lower die disc 1, the bottom of the metal body of the rotor is conveniently positioned, and the stability and the reliability in injection molding are improved;
c. then uniformly installing at least two sliding rails 704 along the outer circumferential side surface of the lower die disc 1, wherein the method preferably adopts three sliding rails, then determining the size of the sliding block 709 according to design requirements, processing the corresponding sliding blocks 709, sleeving the sliding blocks 709 on each sliding rail 704, and simultaneously installing a first baffle 705 and a second baffle 706 along two ends of each sliding rail 704 respectively, wherein the size of the second baffle 706 is larger than that of the first baffle 705, and the second baffle 706 is used for limiting the sliding blocks 709;
the first limiting strip 708 is arranged along the outer side edges of the top surface and the bottom surface of the sliding rail 704, the first supporting strip 711 and the second supporting strip 712 which are mutually parallel are integrally formed on the inner side surface of the sliding block 709, a guide groove 713 is formed between the first supporting strip 711 and the second supporting strip 712 in a matched mode, the second limiting strip 714 is arranged on the first supporting strip 711 and the second supporting strip 712 in a matched mode, the second limiting strip 714 abuts against the first limiting strip 708, through the design of the first limiting strip 708 and the second limiting strip 714, the sliding block 709 can slide along the circumference, the assembly precision is improved, the outward position of the sliding block 709 can be prevented, and the connection stability is improved.
A fourth fixing hole 715 is formed in one end face of the sliding block 709, a second fixing hole 707 is formed in the second baffle 706, and a fastening screw penetrates through the second fixing hole 707 and is connected to the fourth fixing hole 715, so that the sliding block 709 and the second baffle 706 are fixedly assembled, and the sliding block 709 and the second baffle 706 are convenient to install and detach.
The slide block 709 is provided with a clamping groove 716, the clamping groove 716 is matched with the pinch plate 701, one end of the clamping groove 716 is provided with a positioning plate 717, the positioning plate 717 is propped against the pinch plate 701, a third fixing hole 710 is arranged in the clamping groove 716, the pinch plate 701 is provided with a first fixing hole 703, a screw penetrates through the third fixing hole 710 and is connected to the first fixing hole 703, the fixed connection between the pinch plate 701 and the slide block 709 is realized, after the slide block 709 is completely matched with the pinch plate 701, the positioning plate 717 can prop against the end part of the pinch plate 701, then the first fixing hole 703 and the third fixing hole 710 are connected, and the mounting and dismounting efficiency is greatly improved.
S2, machining and assembling of upper die single body 2
a. Firstly, determining the number of upper die monomers 2 according to the size of a rotor, wherein each upper die monomer 2 consists of an upper inner die 4 and an upper outer die 5 and is used for secondary injection molding of an engineering plastic layer on the rotor;
b. then, the upper die 4 is determined according to the shape and the size of the metal body, a corresponding second die shell 401 and a second die cover 402 are processed, injection holes are formed along the top surface of the second die shell 401, the second die shell 401 and the second die cover 402 are integrally processed and molded, and the surfaces of the second die shell 401 and the second die cover 402 are polished;
c. then, an upper outer die 5 is determined according to the shape and the size of a rotor, a corresponding first die shell 501, a first die cover 502 and a baffle ring 503 are processed, the first die shell 501 protrudes upwards along the first die cover 502, the baffle ring 503 protrudes downwards along the outer edge of the first die cover 502, the inner side surfaces of the first die shell 501, the first die cover 502 and the baffle ring 503 are polished, an injection molding interface pipe 504 and an assembly block 506 are arranged along the first die shell 501, and an arc-shaped groove 507 is arranged on the assembly block 506;
the upper inner die 4 is connected to the upper outer die 5 through the fastening piece 505, meanwhile, the injection molding interface pipe 504 is communicated with the injection molding hole, the fastening piece 505 is distributed on the first die shell 501 and the first die cover 502, the fastening piece 505 is convenient to mount and dismount between the upper inner die 4 and the upper outer die 5, and the injection molding interface pipe 504 and the injection molding hole are beneficial to one-time molding and secondary molding of the engineering plastic layer.
d. Installing a fastening block 602 along the edge of the joint of the top surface of the first mold cover 502, determining the size of the buckle plate 701 according to the moving position of the sliding block 709, processing the corresponding buckle plate 701, polishing the outer side surface of the buckle plate 701, and fixedly installing the buckle plate 701 on the outer side of the baffle ring 503 through an L-shaped bracket 702;
e. finally, the processed upper inner die 4 is arranged on the inner side of the upper outer die 5 and is fixed;
the inner walls of the second mold shell 401 and the first mold shell 501 are both obliquely arranged, the included angle between the inner wall of the second mold shell 401 and the horizontal direction is a, the included angle between the inner wall of the first mold shell 501 and the horizontal direction is b, wherein 70 degrees is less than a=b is less than 90 degrees, demolding during one-time injection molding and two-time injection molding is facilitated, and deformation of an engineering plastic layer is prevented. The second mold shell 401 and the first mold shell 501 are of plum blossom-shaped structures, so that the second mold shell and the first mold shell are convenient to cooperate with a rotor, and the injection molding quality of an engineering plastic layer is improved.
S3, casting the metal body
Determining the size of the metal body according to the design requirement of the rotor, forming a required rotary table and a rotary part through integral casting, and fixing the rotary part on the rotary table in a plum blossom shape; the rotary table is provided with a bearing hole, a stop block is arranged in the rotary part, a high-pressure area is formed at the end part of the rotary part, the rotary part is provided with at least one drainage hole and at least one concave hole, the drainage hole is communicated with the high-pressure area and the annular groove, and the concave hole is arranged at the end part of the rotary part;
s4, one-step injection molding of engineering plastic layer
a. Firstly, placing the processed metal body in a lower die disc 1 for positioning, so that one side with a positioning hole and a bearing hole faces downwards, and a rotating part faces upwards;
b. then, selecting a corresponding number of upper die monomers 2 according to the plum blossom-shaped rotating parts, splicing the upper die monomers 2 into a plum blossom-shaped structure, penetrating two adjacent fastening blocks 602 through fastening bolts 601 to realize the fixed connection between the adjacent upper die monomers 2, and simultaneously, fixedly connecting all assembling blocks 506 through fastening rings 3;
c. then, the spliced upper die units 2 are arranged on the lower die plate 1, one end of each buckle plate 701 on the outer side of each upper die unit 2 props against the second baffle 706, and each sliding block 709 is moved to lock the buckle plate 701;
d. finally, injecting the elastomer material in a molten state between the upper inner die 4 and the metal body through an injection molding interface pipe 504 to form a first engineering plastic layer, wherein the injection molding temperature is 400-450 ℃, and the injection molding thickness is 2.5-3 mm;
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.
e. After the first engineering plastic layer reaches the set strength, opening the sliding blocks 709, taking down the upper die monomers 2 one by one, removing the upper inner die 4, and reserving the upper outer die 5;
s5, engineering plastic layer secondary injection molding
a. First, the upper outer mold 5 is installed on the lower mold disc 1, one end of the buckle plate 701 at the outer side of each upper outer mold 5 props against the second baffle 706, and each sliding block 709 is moved to lock the buckle plate 701;
b. then injecting the elastomer material in the molten state between the upper outer die 5 and the first engineering plastic layer through an injection interface pipe 504 to form a second engineering plastic layer, wherein the injection temperature is 300-350 ℃, and the injection thickness is 0.5-1 mm;
c. after the second engineering plastic layer reaches the set strength, the slide blocks 709 are opened, the upper outer dies 5 are taken down one by one, and demoulding is realized, so that the required rotor is formed.
The manufacturing process adopts the inner and outer dies and performs injection molding in a splicing mode, so that the secondary injection molding of the engineering plastic layer is facilitated, the deformation of the engineering plastic layer is improved, the demolding of the whole rotor is facilitated, and the processing quality of the rotor is improved.
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 plum blossom liquid pump rotor is characterized by comprising the following steps of:
s1, machining a lower die disc
a. Firstly, determining the size of a lower die disc according to the size of a rotor, processing the lower die disc with the corresponding size, and polishing the inner side surface of the lower die disc;
b. then installing a positioning block in the lower die disc according to the positions of the positioning hole and the bearing hole on the rotor, so that a positioning groove is formed between the positioning block and the lower die disc;
c. uniformly mounting at least two sliding rails along the outer circumferential side surface of the lower die disc, determining the size of the sliding blocks according to design requirements, processing corresponding sliding blocks, sleeving the sliding blocks on each sliding rail, and simultaneously mounting a first baffle and a second baffle along two ends of each sliding rail respectively, wherein the size of the second baffle is larger than that of the first baffle, and is used for limiting the sliding blocks;
s2, machining and assembling upper die single body
a. Firstly, determining the number of upper die monomers according to the size of a rotor, wherein each upper die monomer consists of an upper inner die and an upper outer die and is used for secondary injection molding of an engineering plastic layer on the rotor;
b. then, an upper die is determined according to the shape and the size of the metal body, a corresponding second die shell and a second die cover are processed, injection holes are formed along the top surface of the second die shell, the second die shell and the second die cover are integrally processed and molded, and the surfaces of the second die shell and the second die cover are polished;
c. then, an upper outer die is determined according to the shape and the size of the rotor, a corresponding first die shell, a first die cover and a baffle ring are processed, the first die shell protrudes upwards along the first die cover, the baffle ring protrudes downwards along the outer edge of the first die cover, the inner side surfaces of the first die shell, the first die cover and the baffle ring are polished, an injection molding interface tube and an assembly block are arranged along the first die shell, and an arc-shaped groove is formed in the assembly block;
d. installing a fastening block along the edge of the joint of the top surface of the first die cover, determining the size of the buckle plate according to the moving position of the sliding block, processing the corresponding buckle plate, polishing the outer side surface of the buckle plate, and fixedly installing the buckle plate on the outer side of the baffle ring through an L-shaped bracket;
e. finally, the processed upper inner die is arranged on the inner side of the upper outer die and is fixed;
s3, casting the metal body
Determining the size of the metal body according to the design requirement of the rotor, forming a required rotary table and a rotary part through integral casting, and fixing the rotary part on the rotary table in a plum blossom shape; the rotary table is provided with a bearing hole, a stop block is arranged in the rotary part, a high-pressure area is formed at the end part of the rotary part, the rotary part is provided with at least one drainage hole and at least one concave hole, the drainage hole is communicated with the high-pressure area and the annular groove, and the concave hole is arranged at the end part of the rotary part;
s4, one-step injection molding of engineering plastic layer
a. Firstly, placing the processed metal body in a lower die disc for positioning, so that one side with a positioning hole and a bearing hole faces downwards, and a rotating part faces upwards;
b. then, selecting a corresponding number of upper die monomers according to the plum blossom-shaped rotating parts, splicing the upper die monomers into a plum blossom-shaped structure, penetrating two adjacent fastening blocks through fastening bolts to realize the fixed connection between the adjacent upper die monomers, and simultaneously, fixedly connecting all the assembly blocks through fastening rings;
c. then, the spliced upper die units are arranged on the lower die plate, one end of a buckle plate on the outer side of each upper die unit props against the second baffle plate, and each sliding block is moved to lock the buckle plate;
d. finally, injecting the elastomer material in a molten state between an upper inner die and a metal body through an injection molding interface pipe to form a first engineering plastic layer, wherein the injection molding temperature is 400-450 ℃, and the injection molding thickness is 2.5-3 mm;
e. after the first engineering plastic layer reaches the set strength, opening the sliding blocks, taking down the upper die monomers one by one, dismantling the upper inner die and reserving the upper outer die;
s5, engineering plastic layer secondary injection molding
a. Firstly, an upper outer mold is arranged on a lower mold disc, one end of a pinch plate at the outer side of each upper outer mold props against a second baffle plate, and each slide block is moved to lock the pinch plate;
b. then injecting the elastomer material in the molten state between the upper outer die and the first engineering plastic layer through an injection molding interface pipe to form a second engineering plastic layer, wherein the injection molding temperature is 300-350 ℃, and the injection molding thickness is 0.5-1 mm;
c. and after the second engineering plastic layer reaches the set strength, opening the sliding blocks, and taking down the upper outer dies one by one to realize demoulding so as to form the required rotor.
2. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: in the step S1, a first limit bar is arranged along the outer side edges of the top surface and the bottom surface of the sliding rail in the process c, a first support bar and a second support bar which are mutually parallel are integrally formed on the inner side surface of the sliding block, a guide groove is formed between the first support bar and the second support bar in a matched mode, the guide groove is matched with the first limit bar, a second limit bar is arranged on the first support bar and the second support bar, and the second limit bar abuts against the first limit bar.
3. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: in the step S1, a fourth fixing hole is formed in one end face of the sliding block, a second fixing hole is formed in the second baffle, and a fastening screw penetrates through the second fixing hole and is connected to the fourth fixing hole, so that the sliding block and the second baffle are fixedly assembled.
4. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: in the step S2, the inner walls of the second mold shell and the first mold shell are both obliquely arranged, the included angle between the inner wall of the second mold shell and the horizontal direction is a, and the included angle between the inner wall of the first mold shell and the horizontal direction is b, wherein 70 ° < a=b < 90 °.
5. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: the second die shell and the first die shell in the step S2 are both in plum blossom-shaped structures.
6. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: the upper inner die in the step S2 is connected to the upper outer die through fasteners, meanwhile, the injection molding interface tube is guaranteed to be communicated with the injection molding holes, and the fasteners are distributed on the first die shell and the first die cover.
7. The manufacturing process of the quincuncial liquid pump rotor according to claim 1, wherein: the step S1 is characterized in that a clamping groove is formed in the sliding block, the clamping groove is matched with the buckle plate, a positioning plate is arranged at one end of the clamping groove, the positioning plate abuts against the buckle plate, a third fixing hole is formed in the clamping groove, a first fixing hole is formed in the buckle plate, and a screw penetrates through the third fixing hole and is connected to the first fixing hole, so that the buckle plate is fixedly connected with the sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311679629.9A CN117754820A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of plum blossom liquid pump rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311679629.9A CN117754820A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of plum blossom liquid pump rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117754820A true CN117754820A (en) | 2024-03-26 |
Family
ID=90313502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311679629.9A Pending CN117754820A (en) | 2023-12-07 | 2023-12-07 | Manufacturing process of plum blossom liquid pump rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117754820A (en) |
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2023
- 2023-12-07 CN CN202311679629.9A patent/CN117754820A/en active Pending
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