CN112427896A - Spinning roller and process thereof - Google Patents
Spinning roller and process thereof Download PDFInfo
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- CN112427896A CN112427896A CN202011314421.3A CN202011314421A CN112427896A CN 112427896 A CN112427896 A CN 112427896A CN 202011314421 A CN202011314421 A CN 202011314421A CN 112427896 A CN112427896 A CN 112427896A
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- roller
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- roller shaft
- roller body
- support piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention discloses a spinning roller and a process thereof, relates to the processing of spinning accessories, and aims to solve the problem that the straightness of an upper roller and a lower roller is influenced due to the deformation under the action of internal heat, so that the efficiency of conveying cloth between the spinning rollers is influenced, and the technical scheme is characterized in that: including the roller shaft and the roller body, the cover is equipped with the end piece that is located roller body both ends on the roller shaft, sets up the through-hole with the inner chamber intercommunication of the roller body on the end piece, can dismantle between the adjacent end piece be connected with a plurality of support piece with the inner wall laminating of the roller body, the middle part cover of roller shaft is equipped with the connection piece with the support piece joint. The supporting piece is used for strengthening and supporting the roller body, the deformation resistance of the spinning roller is improved, the through holes are formed in the end pieces, the balance between the internal pressure of the spinning roller and the external air pressure is achieved, and the deformation caused by heating under the action of internal heat is reduced.
Description
Technical Field
The invention relates to textile accessory processing, in particular to a textile roller and a process thereof.
Background
The roller is one of the parts of textile machinery, and is widely used for mechanisms such as drafting, carding, conveying and the like. The roller generally comprises an upper roller and a lower roller when used for drafting the sliver, the sliver is positioned between the upper roller and the lower roller, and the upper roller applies pressure to the lower roller, so that the tension of the sliver is ensured, and the larger the pressure is, the larger the tension of the sliver is.
The existing roller is usually sleeved on a roller shaft through a barrel body, end pieces and the roller shaft are welded at two ends of the barrel body in a welding mode to form a roller finished product, according to the using situation and occasion, the friction force between the roller and cloth and yarns is improved by wrapping materials such as rubber outside the barrel body, and when the roller is used on high-temperature shaping equipment, the roller is influenced by long-time high temperature and is easy to deform under the action of internal heat, so that the straightness of the upper roller and the lower roller is influenced, and irregular gaps are formed between the upper roller and the lower roller to influence the drafting of the yarns and the cloth.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a spinning roller and a process thereof.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a spinning roller, includes the roller axle and the roller body, the epaxial cover of roller is equipped with the end piece that is located roller body both ends, set up the through-hole that communicates with the inner chamber of the roller body on the end piece, it is adjacent can dismantle the support piece that is connected with a plurality of inner wall laminating with the roller body between the end piece, the middle part cover of roller axle is equipped with the connection piece with the support piece joint.
Through adopting above-mentioned technical scheme, the inner wall of the roller body is hugged closely to support piece through the joint between the both ends piece, when guaranteeing that the weaving roller has hollow structure and the quality is lighter, improve the anti deformability of weaving roller, and set up the through-hole that runs through on the end piece, when making the weaving roller use high temperature equipment such as with high temperature forming machine, avoid the inner chamber of the roller body to be heated under the inflation and lead to the roller body to take place deformation at high temperature, improve the anti deformability of weaving roller, and then ensure the straightness of weaving roller, solved because the weaving roller influences the laminating degree between roller and the lower roller because deformation, improve the pay-off efficiency of weaving roller.
The invention is further configured to: support piece is the U-shaped, the one side that the end piece moves towards each other is equipped with the round platform portion, set up the caulking groove that a plurality of ends that are used for holding support piece on the periphery wall of round platform portion.
Through adopting above-mentioned technical scheme, set up the caulking groove on the round platform portion, can carry out the joint to the end that is the support piece of U-shaped, improve the joint strength between the both ends piece, improve the wholeness of weaving roller.
The invention is further configured to: the longitudinal section of the supporting piece is circular, and the peripheral wall of the supporting piece is tangent to the edge of the end piece.
By adopting the technical scheme, the longitudinal section of the supporting piece is circular, and the edge of the outer peripheral wall of the supporting piece is tangent to the edge of the end piece, so that the roller body is convenient to mount.
The invention is further configured to: a plurality of arc-shaped grooves used for accommodating the supporting pieces are distributed on the edge of the connecting piece in an annular array mode, and a plurality of round holes penetrating through the connecting piece are formed in the connecting piece.
Through adopting above-mentioned technical scheme, through offering of arc wall, realize the joint of support piece and connection piece, and curved structure, increase the area of contact between support piece and the connection piece improves the bearing capacity at support piece middle part.
A process for preparing a textile roller, comprising the steps of:
s1, selecting materials, selecting a roller body in a cylindrical structure and a roller shaft in a hollow structure, and detecting that no obvious cracks or pits exist on the outer surfaces of the roller body and the roller shaft;
s2, grinding, namely placing the roller body and the roller shaft on a grinding machine for grinding, removing rust on the outer surfaces of the roller body and the roller shaft, and finishing the tolerance of the outer diameter of the roller shaft;
s3, blanking a wafer, cutting a connecting sheet in an annular structure from a steel plate by a wire cutting machine, cutting a plurality of arc-shaped grooves which are distributed in an annular array and are in a semicircular structure from the edge of the connecting sheet, and cutting an end sheet in the annular structure;
s4, cold bending, namely selecting a Q275 steel carbon steel bar, cutting the steel bar through a cutting machine, and bending two ends of the supporting piece by 90 degrees towards the same direction through a cold bending machine to form the supporting piece;
s5, cutting the bump, cutting the steel block by a wire cutting machine to form a circular-ring-shaped circular table part, and welding the circular-ring-shaped circular table part with the end piece in the step S3 in a welding mode;
s6, turning, namely fixing the end piece obtained in the step S5 on a machine tool through a three-jaw chuck, and then forming a plurality of caulking grooves distributed in an annular array mode on the outer peripheral wall of the circular table portion through a cutter, wherein the diameter of each caulking groove is the same as that of each supporting piece;
s7, detecting straightness, namely, placing the roller shaft obtained in the step S2 on a calibrating machine, detecting the straightness of the roller shaft through a dial indicator, and correcting through a pressure lever;
s8, assembling a support structure, sleeving a connecting piece on a roller shaft and at the midpoint of the roller shaft, sleeving end pieces on the roller shaft from two ends of the roller shaft, arranging a circular table part facing the connecting piece, and then embedding two ends of a plurality of support parts into embedding grooves to be clamped with the circular table part;
s9, assembling and welding, finely adjusting the positions of the two end pieces and the support piece to ensure that the center of the semi-finished product assembled in the step S8 is positioned at the middle point of the roller shaft, sleeving the roller body outside the support piece and connecting the roller body with the end pieces in a continuous welding mode to assemble a roller;
and S10, grinding and polishing, namely grinding and polishing the roller prepared in the step S9 by a centerless grinder, soaking the roller in cleaning oil, airing and packaging.
Through adopting above-mentioned technical scheme, mode processing support piece through the clod wash for support piece has good intensity, and makes things convenient for people's operation, and in the assembly welding step, finely tunes the position of end piece and support piece, and then can adjust weaving roller focus, at the in-process of transport and transportation, reduces the focus skew and leads to the inconvenient problem of installation.
The invention is further configured to: and step S3, placing the connecting sheet and the end sheet after the arc-shaped groove is cut on a circular grinder, grinding the two sides of the connecting sheet and the end sheet, and processing round holes and through holes on the connecting sheet and the end sheet through a drilling machine.
Through adopting above-mentioned technical scheme, polish through end piece and connection piece, improve the glossiness at weaving roller both ends to through seting up of round hole and through-hole, improve the inside and external atmospheric pressure's of weaving roller balance.
The invention is further configured to: the step S6 further includes placing the end piece, the connecting piece, the supporting piece, the roller shaft and the roller body in hot oil at 350-550 ℃ for quenching for 10min, and performing cold treatment on the surface by liquid nitrogen after cooling to room temperature.
By adopting the technical scheme, the surface of the workpiece is sequentially subjected to hot oil quenching and liquid nitrogen cooling treatment, the upper shell body with the feather-shaped metallographic structure made of metal materials can be changed, and the strength and toughness of the workpiece are improved.
In conclusion, the invention has the following beneficial effects:
the inner wall of the roller body is hugged closely through the support piece of joint between the both ends piece, when guaranteeing that the weaving roller has hollow structure and the quality is lighter, improve the anti deformability of weaving roller, and set up the through-hole that runs through on the end piece, when making the weaving roller use high temperature equipment such as with high temperature forming machine, avoid the inner chamber of the roller body to be heated expansion under high temperature and lead to the roller body to take place deformation, improve the anti deformability of weaving roller, and then ensure the straightness of weaving roller, solved because the weaving roller influences the laminating degree between roller and the lower roller owing to deformation, improve the pay-off efficiency of weaving roller.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of the support member of the present invention;
fig. 5 is an enlarged view of a portion B in fig. 4.
In the figure: 1. a roller shaft; 2. a roller body; 3. an end piece; 4. a through hole; 5. a support member; 6. connecting sheets; 7. a circular table portion; 8. caulking grooves; 9. an arc-shaped slot; 10. a circular hole.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The first embodiment is as follows:
the utility model provides a weaving roller, as shown in fig. 1, fig. 2 and fig. 4, including roller axle 1 and the roller body 2, the cover is equipped with the end piece 3 that is located roller body 2 both ends on the roller axle 1 to set up the through-hole 4 with the inner chamber intercommunication of roller body 2 on the end piece 3, be connected with support piece 5 of a plurality of and roller body 2's inner wall laminating through the mode of joint between the adjacent end piece 3, the middle part cover of roller axle 1 is equipped with the connection piece 6 with support piece 5 joint.
As shown in fig. 2 to 4, the supporting member 5 is U-shaped, the circular table portion 7 is welded on one side of the end piece 3 facing each other, the end piece 3 and the circular table portion 7 are of an annular structure, the end piece 3 and the circular table portion 7 are coaxially arranged, a plurality of caulking grooves 8 used for accommodating the end of the supporting member 5 are formed in the outer peripheral wall of the circular table portion 7, the plurality of caulking grooves 8 are distributed on the circular table portion 7 in an annular array mode, the longitudinal section of the supporting member 5 is circular, and the outer peripheral wall of the supporting member 5 is tangent to the edge of the end piece 3.
As shown in fig. 5, a plurality of arc-shaped grooves 9 for accommodating the supporting member 5 are distributed on the edge of the connecting sheet 6 in an annular array, and a plurality of circular holes 10 penetrating through the connecting sheet 6 are formed on the connecting sheet 6.
When people put into use by wrapping rubber or cloth materials outside the roller body 2, because the roller body 2 is tightly attached to the inner wall of the roller body 2 with the roller shaft 1 through the support piece 5 clamped between the two end pieces 3, the anti-deformation capacity of the textile roller is improved while the textile roller is ensured to have a hollow structure and light quality, and the through hole 4 which runs through is formed in the end piece 3, so that when the textile roller is applied to high-temperature equipment such as a high-temperature setting machine, the phenomenon that the roller body 2 deforms due to the fact that the inner cavity of the roller body 2 expands under the high-temperature heating is avoided, the anti-deformation capacity of the textile roller is improved, the straightness of the textile roller is further ensured, the problem that the textile roller influences the attaching degree between the upper roller and the lower roller due to deformation is solved, and the feeding efficiency of the textile roller is improved.
And support piece 5's both ends are inlayed to caulking groove 8 on round platform portion 7 through the mode of joint in, improve the joint strength between the both ends piece 3, make things convenient for the operation of people's equipment simultaneously to through the middle part cover at roller axle 1 establish with support piece 5 joint connection piece 6, can play good supporting role to support piece 5's middle part, improve the anti deformability of roller under the action of gravity.
Example two:
a process for manufacturing a textile roller, comprising the steps of: s1, selecting materials, selecting a roller body 2 in a cylindrical structure and a roller shaft 1 in a hollow structure, and detecting that no obvious crack or pit exists on the outer surfaces of the roller body 2 and the roller shaft 1;
s2, grinding, namely placing the roller body 2 and the roller shaft 1 on a grinding machine for grinding, removing rust on the outer surfaces of the roller body 2 and the roller shaft 1, and finishing the tolerance of the outer diameter of the roller shaft 1;
s3, blanking a wafer, cutting a connecting sheet 6 with an annular structure from a steel plate by a wire cutting machine, cutting a plurality of arc-shaped grooves 9 which are distributed in an annular array and have a semicircular structure at the edge of the connecting sheet 6, cutting an end sheet 3 with the annular structure, placing the connecting sheet 6 and the end sheet 3 after the arc-shaped grooves 9 are cut on a circular grinding machine, grinding the two sides of the connecting sheet 6 and the end sheet 3, and processing a round hole 10 and a through hole 4 on the connecting sheet 6 and the end sheet 3 by a drilling machine;
s4, cold bending, namely selecting a Q275 steel carbon steel bar, cutting the steel bar through a cutting machine, and bending two ends of the support piece 5 by 90 degrees towards the same direction through a cold bending machine to form the support piece 5;
s5, cutting the bump, cutting the steel block by a wire cutting machine to form a circular-ring-shaped circular platform part 7, and welding the circular-ring-shaped circular platform part 7 with the end piece 3 in the step S3 in a welding mode;
s6, turning, namely fixing the end piece 3 obtained by the processing in the step S5 on a machine tool through a three-jaw chuck, then forming a plurality of embedding grooves 8 distributed in an annular array mode on the outer peripheral wall of the circular table portion 7 through a cutter, enabling the diameters of the embedding grooves 8 to be the same as the diameters of the supporting pieces 5, then placing the end piece 3, the connecting piece 6, the supporting pieces 5, the roller shaft 1 and the roller body 2 in hot oil at the temperature of 350-550 ℃ for quenching for 10min, cooling to room temperature, and then performing liquid nitrogen cooling processing on the surface through liquid nitrogen, wherein the liquid nitrogen is specifically processed in a vapor state through a liquid nitrogen machine.
S7, detecting straightness, namely, placing the roller shaft 1 obtained in the step S2 on a calibrating machine, detecting the straightness of the roller shaft 1 through a dial indicator, and correcting through a pressure lever;
s8, assembling a support structure, sleeving a connecting piece 6 on a roller shaft 1 and locating at the middle point of the roller shaft 1, sleeving end pieces 3 on the roller shaft 1 from two ends of the roller shaft 1, arranging a circular table part 7 towards the connecting piece 6, and then embedding two ends of a plurality of support pieces 5 into an embedding groove 8 to be clamped with the circular table part 7;
s9, assembling and welding, finely adjusting the positions of the two end plates 3 and the support piece 5 to ensure that the center of the semi-finished product assembled in the step S8 is positioned at the middle point of the roller shaft 1, sleeving the roller body 2 outside the support piece 5 and connecting the roller body with the end plates 3 in a continuous welding mode to assemble a roller;
and S10, grinding and polishing, namely grinding and polishing the roller prepared in the step S9 by a centerless grinder, soaking the roller in cleaning oil, airing and packaging.
The roller body 2 and the roller shaft 1 without cracks and pits are selected on the selected material, the service life of the textile roller is prolonged, the condition of fracture is not easy to occur in the subsequent processing process, the roller shaft 1 is further improved in precision by grinding on a grinding machine, the consistency of the roller finished product is improved, appearance flaws such as rust marks are removed, the quality of the roller is improved, the connecting sheet 6 and the end sheet 3 adopt a linear cutting mode, the cutting precision of the end sheet 3 and the connecting sheet 6 is improved, the problem of burrs existing in the cutting process is reduced, the processing steps of people are reduced, the production efficiency of roller accessories is improved, the two ends of the supporting piece 5 are bent by 90 degrees by the supporting piece 5 in a cold bending mode to form a U shape, the two ends of the supporting piece 5 can be embedded into the embedding grooves 8 of the circular table part 7, the connecting strength between the two end sheets 3 is improved, and the operation of people is facilitated, and parts such as the roller shaft 1 and the like are placed in hot oil at 350-550 ℃ for quenching, and the surface of the workpiece is subjected to cold treatment through subsequent vapor-state liquid nitrogen, so that the strength and toughness of the roller shaft 1, the end piece 3, the connecting piece 6, the supporting piece 5 and the roller body 2 are improved, and the deformation resistance of the spinning roller is improved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A spinning roller, characterized in that: including the roller shaft (1) and the roller body (2), the cover is equipped with end piece (3) that are located roller body (2) both ends on roller shaft (1), set up through-hole (4) with the inner chamber intercommunication of the roller body (2) on end piece (3), adjacent can dismantle support piece (5) that are connected with the inner wall laminating of a plurality of and roller body (2) between end piece (3), the middle part cover of roller shaft (1) is equipped with connection piece (6) with support piece (5) joint.
2. A spinning roller according to claim 1, characterised in that: support piece (5) are the U-shaped, one side that end piece (3) faced each other is equipped with round platform portion (7), set up caulking groove (8) that a plurality of ends that are used for holding support piece (5) on the periphery wall of round platform portion (7).
3. A spinning roller according to claim 2, characterised in that: the longitudinal section of the support piece (5) is circular, and the peripheral wall of the support piece (5) is tangent to the edge of the end piece (3).
4. A spinning roller according to claim 3, characterised in that: a plurality of arc-shaped grooves (9) used for accommodating the supporting pieces (5) are distributed on the edge of the connecting piece (6) in an annular array mode, and a plurality of round holes (10) penetrating through the connecting piece (6) are formed in the connecting piece (6).
5. A process for manufacturing a textile roller according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:
s1, selecting materials, selecting a roller body (2) in a cylindrical structure and a roller shaft (1) in a hollow structure, and detecting that no obvious cracks or pits exist on the outer surfaces of the roller body (2) and the roller shaft (1);
s2, grinding, namely placing the roller body (2) and the roller shaft (1) on a grinding machine for grinding, removing rust on the outer surfaces of the roller body (2) and the roller shaft (1), and finishing the tolerance of the outer diameter of the roller shaft (1);
s3, blanking a wafer, cutting a connecting sheet (6) with an annular structure from a steel plate by a wire cutting machine, cutting a plurality of arc-shaped grooves (9) which are distributed in an annular array and have a semicircular structure at the edge of the connecting sheet (6), and cutting an end sheet (3) with an annular structure;
s4, cold bending, namely selecting a Q275 steel carbon steel bar, cutting the steel bar through a cutting machine, and bending two ends of the support piece (5) towards the same direction by 90 degrees through a cold bending machine to form the support piece (5);
s5, cutting the bump, cutting the steel block by a wire cutting machine to form a circular-ring-shaped circular table part (7), and welding the circular-ring-shaped circular table part with the end piece (3) in the step S3 in a welding mode;
s6, turning, namely fixing the end piece (3) obtained by processing in the step S5 on a machine tool through a three-jaw chuck, and then forming a plurality of embedding grooves (8) which are distributed in an annular array mode on the outer peripheral wall of the circular table part (7) through a cutter, wherein the diameters of the embedding grooves (8) are the same as those of the supporting part (5);
s7, detecting straightness, namely, placing the roller shaft (1) obtained in the step S2 on a calibrating machine, detecting the straightness of the roller shaft (1) through a dial indicator, and correcting through a pressure lever;
s8, assembling a supporting structure, sleeving a connecting piece (6) on a roller shaft (1) and at the midpoint of the roller shaft (1), sleeving an end piece (3) on the roller shaft (1) from two ends of the roller shaft (1), arranging a circular table part (7) towards the connecting piece (6), and then embedding two ends of a plurality of supporting pieces (5) into an embedding groove (8) to be clamped with the circular table part (7);
s9, assembling and welding, finely adjusting the positions of the two end pieces (3) and the support piece (5) to ensure that the center of the semi-finished product assembled in the step S8 is positioned at the middle point of the roller shaft (1), sleeving the roller body (2) outside the support piece (5) and connecting the roller body and the end pieces (3) in a continuous welding mode to assemble a roller;
and S10, grinding and polishing, namely grinding and polishing the roller prepared in the step S9 by a centerless grinder, soaking the roller in cleaning oil, airing and packaging.
6. Process for spinning rollers according to claim 5, characterized in that: and step S3, placing the connecting sheet (6) and the end sheet (3) which are cut into the arc-shaped groove (9) on a circular grinding machine, grinding the two sides of the connecting sheet (6) and the end sheet (3), and processing a round hole (10) and a through hole (4) on the connecting sheet (6) and the end sheet (3) through a drilling machine.
7. Process for spinning rollers according to claim 5, characterized in that: the step S6 further comprises the steps of placing the end piece (3), the connecting piece (6), the supporting piece (5), the roller shaft (1) and the roller body (2) in hot oil at the temperature of 350-550 ℃ for quenching for 10min, and cooling the surface by liquid nitrogen after the temperature is cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314421.3A CN112427896B (en) | 2020-11-21 | 2020-11-21 | Spinning roller and process thereof |
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|---|---|---|---|
| CN202011314421.3A CN112427896B (en) | 2020-11-21 | 2020-11-21 | Spinning roller and process thereof |
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| CN112427896B CN112427896B (en) | 2022-03-22 |
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