CN111360596B - Plastic-coated steel pipe production and manufacturing process - Google Patents
Plastic-coated steel pipe production and manufacturing process Download PDFInfo
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- CN111360596B CN111360596B CN202010207342.6A CN202010207342A CN111360596B CN 111360596 B CN111360596 B CN 111360596B CN 202010207342 A CN202010207342 A CN 202010207342A CN 111360596 B CN111360596 B CN 111360596B
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- steel pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
- B05C1/022—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles to the outer surface of hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a plastic-coated steel tube production and manufacturing process, which adopts the following outer surface plastic-coated processing equipment, wherein the outer surface plastic-coated processing equipment comprises a supporting clamping device, a side plastic-coated device and a rear polishing device; the supporting and clamping device is evenly provided with a processing groove, the left side and the right side in the processing groove are evenly provided with a side plastic coating device, and the front side and the rear side in the processing groove are symmetrically provided with a rear polishing device. The invention can solve the problems that the surface of the steel pipe to be processed has rough parts in the external plastic coating processing process of the existing equipment, the steel pipe generates flaws in the subsequent plastic coating process due to lack of polishing, the quality of the produced plastic coated steel pipe is reduced, and the quality of the subsequent plastic coated steel pipe is influenced by uneven coating, concave-convex parts and the like due to one-time coating process adopted after the external surface is subjected to plastic spraying in the external plastic coating processing process of the existing equipment.
Description
Technical Field
The invention relates to the field of plastic-coated steel pipe processing, in particular to a production and manufacturing process of a plastic-coated steel pipe.
Background
The plastic-coated steel pipe, also known as plastic-coated pipe, steel-plastic composite pipe and plastic-coated composite steel pipe, is a steel-plastic composite steel pipe which uses steel pipe as base body and adopts the processes of spraying, rolling, soaking and absorbing to weld a plastic anticorrosive layer on the inner surface of the steel pipe (bottom pipe) or weld a plastic anticorrosive layer on the inner and outer surfaces of the steel pipe. The plastic coated steel pipe has excellent corrosion resistance and smaller frictional resistance. The epoxy resin plastic-coated steel pipe is suitable for conveying water supply and drainage, seawater, warm water, oil, gas and other media, and the polyvinyl chloride plastic-coated steel pipe is suitable for conveying water supply and drainage, seawater, oil, gas and other media.
At present, the prior plastic coated steel pipe usually has the following defects in the production and manufacturing process: 1. in the existing equipment, in the process of external plastic coating machining, the surface of a steel pipe to be machined has a rough part, and the steel pipe generates flaws in the subsequent plastic coating process due to lack of polishing, so that the quality of the produced plastic-coated steel pipe is reduced; 2. the existing equipment adopts a one-time coating process after the outer surface is subjected to plastic spraying in the process of carrying out outer plastic coating processing, so that the coating is not uniform, and the quality of a subsequent plastic-coated steel pipe is influenced due to the occurrence of concave-convex parts.
Disclosure of Invention
Technical problem to be solved
The invention can solve the problems that the surface of the steel pipe to be processed has rough parts in the external plastic coating processing process of the existing equipment, the steel pipe generates flaws in the subsequent plastic coating process due to lack of polishing, the quality of the produced plastic coated steel pipe is reduced, and the quality of the subsequent plastic coated steel pipe is influenced by uneven coating, concave-convex parts and the like due to one-time coating process adopted after the external surface is subjected to plastic spraying in the external plastic coating processing process of the existing equipment.
(II) technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme that the plastic-coated steel pipe production and manufacturing process adopts the following outer surface plastic-coated processing equipment, wherein the outer surface plastic-coated processing equipment comprises a supporting clamping device, a side plastic-coated device and a rear polishing device; the supporting and clamping device is evenly provided with a processing groove, the left side and the right side in the processing groove are evenly provided with a side plastic coating device, and the front side and the rear side in the processing groove are symmetrically provided with a rear polishing device.
The supporting and clamping device comprises a bottom plate, a supporting frame, a top plate, clamping grooves and a lower end clamping mechanism, wherein the supporting frame is arranged on the upper end surface of the bottom plate, the top plate is arranged on the upper end surface of the supporting frame, the clamping grooves are uniformly formed in the top plate, and the lower end clamping mechanism is uniformly arranged on the upper end surface of the inner side of the bottom plate; the steel pipe to be processed is fixed in the supporting frame through the matching of the lower end clamping mechanism and the clamping groove.
The side plastic coating device comprises a coating mechanism, rotating support plates, drive plates, rotating ring plates, a plastic spraying support frame, a coating groove and a plastic spraying head, wherein the rotating support plates are uniformly arranged in the support frame, the adjacent rotating support plates form a group, the drive plates are arranged on the inner surfaces of the rotating support plates, the rotating ring plates are arranged between the drive plates, the cross sections of the rotating ring plates are of annular structures, the upper ends of the rotating ring plates are connected with a top plate in a sliding clamping groove matching mode, the coating mechanisms are uniformly arranged on the left and right sides of the inner surfaces of the rotating ring plates, the plastic spraying support frame is arranged between the adjacent coating mechanisms, the coating groove is formed in the plastic spraying support frame, and the plastic spraying head; the drive plate drives the rotating ring plate to rotate, the plastic spraying head sprays the coating to the outer surface of the steel pipe, and the coating mechanism is used for uniformly coating the outer surface of the coating.
The rear polishing device comprises a hydraulic rod, a polishing support plate, an electric rotating ring, a fitting frame, a fitting movable block, a fitting spring, a polishing plate and polishing balls, wherein the hydraulic rod is symmetrically arranged on the front and back of the inner surface of the rotating ring plate; drive the backup pad of polishing through the hydraulic stem and press close to the steel pipe surface, laminating spring and laminating movable block cooperation make the ball of polishing paste tight steel pipe surface, utilize electronic swivel to drive the rotatory steel pipe surface of polishing of board.
The production and manufacturing process of the plastic-coated steel pipe comprises the following steps:
step one, oil removal treatment: manually wiping, degreasing and deoiling the outer surface of the steel pipe to be processed by utilizing deoiling cloth to obtain a deoiled steel pipe;
step two, plastic coating treatment: performing surface plastic coating operation on the outer surface of the oil-removed steel pipe obtained in the step one by using outer surface plastic coating processing equipment to obtain a plastic-coated steel pipe;
step three, combined treatment: combining the plastic-coated steel pipes obtained in the second step, and combining the plastic-coated steel pipes by using bolts to obtain finished plastic-coated steel pipes;
step four, stacking treatment: and (4) coding the finished plastic-coated steel pipes, stacking the steel pipes in order, and conveying the steel pipes to a warehouse for storage.
Preferably, the lower end clamping mechanism comprises a sliding limiting rod, a clamping spring, a clamping plate and a locking ring, the sliding limiting rod is uniformly and symmetrically arranged on the upper end surface of the bottom plate, the clamping plate is arranged on the sliding limiting rod in a sliding fit manner, the clamping spring is arranged on the outer side of the sliding limiting rod, and the locking ring is arranged on the inner side surface of the clamping plate; the clamping spring is matched with the locking ring for use, so that the lower end of the steel pipe is clamped and fixed.
Preferably, the brushing mechanism comprises a brushing support frame, a brushing movable block, a brushing buffer spring, a rotating support plate and a brushing rotary drum, the brushing support frames are uniformly arranged on the left and right sides of the inner surface of the rotating ring plate, the brushing movable block is arranged on the brushing support frame in a sliding fit manner, the brushing buffer spring is arranged between the brushing movable block and the brushing support frame, the rotating support plate is arranged on the outer end surface of the brushing movable block, and the brushing rotary drum is arranged on the upper side and the lower side of the rotating support plate; the brushing buffer spring is matched with the brushing movable block for use, so that the brushing rotary drum is tightly attached to the outer surface of the steel pipe for brushing operation.
Preferably, the brushing mechanisms positioned on the left side and the right side of the inner surface of the rotating ring plate are arranged in a zigzag staggered manner.
Preferably, the clamping plate is of a lower side square and upper side arc structure, and the radian of the locking ring is matched with the upper side of the clamping plate.
Preferably, a sponge layer is arranged on the outer side of the brushing rotary drum.
(III) advantageous effects
1. According to the plastic-coated steel pipe production and manufacturing process provided by the invention, in the process of external plastic coating machining, the electric rotating ring is used for driving the polishing plate to rotate to polish the outer surface of the steel pipe, so that the rough part on the surface of the steel pipe to be machined is eliminated, the defects in the subsequent plastic coating process are prevented, and the quality of the produced plastic-coated steel pipe is improved;
2. according to the production and manufacturing process of the plastic-coated steel pipe, in the process of external plastic coating machining, the rotating ring plate is driven by the driving plate to rotate to drive the coating mechanisms which are arranged in a zigzag staggered manner, and a staggered secondary coating process is performed, so that coating is uniform, concave-convex parts are prevented from being formed, and the quality of the subsequent plastic-coated steel pipe is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view of a portion I of FIG. 2 according to the present invention;
FIG. 4 is a cross-sectional view of the support frame of the present invention;
FIG. 5 is an enlarged fragmentary view of portion II of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic view of the construction of the sanding plate of the present invention;
fig. 7 is a schematic structural view of the lower end fastening mechanism of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 7, the plastic-coated steel tube production and manufacturing process adopts the following outer surface plastic-coated processing equipment, and the outer surface plastic-coated processing equipment comprises a supporting clamping device 1, a side plastic-coated device 2 and a rear polishing device 3; the supporting and clamping device 1 is evenly provided with a processing groove, the left side and the right side in the processing groove are evenly provided with a side plastic coating device 2, and the front side and the rear side in the processing groove are symmetrically provided with a rear polishing device 3.
The supporting and clamping device 1 comprises a bottom plate 11, a supporting frame 12, a top plate 13, clamping grooves 14 and a lower end clamping mechanism 15, wherein the supporting frame 12 is installed on the upper end surface of the bottom plate 11, the top plate 13 is installed on the upper end surface of the supporting frame 12, the clamping grooves 14 are uniformly arranged on the top plate 13, and the lower end clamping mechanism 15 is uniformly installed on the upper end surface of the inner side of the bottom plate 11; the steel pipe to be processed is fixed in the support frame 12 through the cooperation of the lower end clamping mechanism 15 and the clamping groove 14.
The side plastic coating device 2 comprises a coating mechanism 21, a rotating support plate 22, a drive plate 23, rotating ring plates 24, a plastic coating support frame 25, a coating groove 26 and a plastic coating head 27, wherein the rotating support plate 22 is uniformly arranged in the support frame 12, the adjacent rotating support plates 22 form a group, the drive plate 23 is arranged on the inner surface of the rotating support plate 22, the rotating ring plates 24 are arranged between the drive plates 23, the cross section of each rotating ring plate 24 is of an annular structure, the upper end of each rotating ring plate 24 is connected with the top plate 13 in a sliding clamping groove matching mode, the coating mechanisms 21 are uniformly arranged on the left and right sides of the inner surface of each rotating ring plate 24, the coating mechanisms 21 on the left and right sides of the inner surface of each rotating ring plate 24 are arranged in a zigzag staggered mode, the plastic coating support frames 25 are arranged between the adjacent coating mechanisms 21, the coating grooves 26 are arranged in the plastic coating support; the drive plate 23 drives the rotary ring plate 24 to rotate, the plastic spraying head 27 sprays the coating on the outer surface of the steel pipe, and the coating mechanism 21 is used for uniformly coating the outer surface of the steel pipe.
The rear polishing device 3 comprises a hydraulic rod 31, a polishing support plate 32, an electric rotating ring 33, a bonding frame 34, a bonding movable block 35, a bonding spring 36, a polishing plate 37 and a polishing ball 38, wherein the hydraulic rods 31 are symmetrically arranged on the front and back of the inner surface of the rotating ring plate 24, the polishing support plate 32 is arranged at the movable end of the hydraulic rod 31, the electric rotating ring 33 is arranged in the middle of the polishing support plate 32, the bonding frame 34 is arranged in the electric rotating ring 33, the bonding movable block 35 is arranged in the bonding frame 34 in a sliding fit manner, the bonding spring 36 is arranged between the bonding movable block 35 and the bonding frame 34, the polishing plate 37 is arranged on the outer end surface of the bonding movable block 35, and the polishing ball 38 is uniformly arranged on the outer end surface of the polishing plate 37; the hydraulic rod 31 drives the grinding support plate 32 to be close to the outer surface of the steel pipe, the fitting spring 36 is matched with the fitting movable block 35 to enable the grinding ball 38 to be close to the outer surface of the steel pipe, and the electric rotating ring 33 is used for driving the grinding plate 37 to rotate to grind the outer surface of the steel pipe.
The lower end clamping mechanism 15 comprises a sliding limiting rod 151, a clamping spring 152, a clamping plate 153 and a locking ring 154, the sliding limiting rod 151 is uniformly and symmetrically installed on the upper end surface of the bottom plate 11, the clamping plate 153 is installed on the sliding limiting rod 151 in a sliding fit mode, the clamping plate 153 is of an arc structure with a square lower side and an upper side, the radian of the locking ring 154 is matched with the upper side of the clamping plate 153, the clamping spring 152 is installed on the outer side of the sliding limiting rod 151, and the locking ring 154 is installed on the inner side surface of the clamping plate 153; the clamping spring 152 is matched with the locking ring 154 to clamp and fix the lower end of the steel pipe.
The painting mechanism 21 comprises a painting support frame 211, a painting movable block 212, a painting buffer spring 213, a rotating support plate 214 and a painting rotary drum 215, the painting support frame 211 is uniformly arranged on the left and right sides of the inner surface of the rotating annular plate 24, the painting movable block 212 is arranged on the painting support frame 211 in a sliding fit mode, the painting buffer spring 213 is arranged between the painting movable block 212 and the painting support frame 211, the rotating support plate 214 is arranged on the outer end surface of the painting movable block 212, the painting rotary drum 215 is arranged on the upper side and the lower side of the rotating support plate 214, and a sponge layer is arranged on the outer side of the painting rotary; the brushing buffer spring 213 is used in cooperation with the brushing movable block 212, so that the brushing drum 215 is brought into close contact with the outer surface of the steel pipe to perform brushing.
The production and manufacturing process of the plastic-coated steel pipe comprises the following steps:
step one, oil removal treatment: manually wiping, degreasing and deoiling the outer surface of the steel pipe to be processed by utilizing deoiling cloth to obtain a deoiled steel pipe;
step two, plastic coating treatment: performing surface plastic coating operation on the outer surface of the oil-removed steel pipe obtained in the step one by using outer surface plastic coating processing equipment to obtain a plastic-coated steel pipe;
step three, combined treatment: combining the plastic-coated steel pipes obtained in the second step, and combining the plastic-coated steel pipes by using bolts to obtain finished plastic-coated steel pipes;
step four, stacking treatment: and (4) coding the finished plastic-coated steel pipes, stacking the steel pipes in order, and conveying the steel pipes to a warehouse for storage.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A plastic-coated steel tube production and manufacturing process adopts the following outer surface plastic-coated processing equipment, and the outer surface plastic-coated processing equipment comprises a supporting clamping device (1), a side plastic-coated device (2) and a rear polishing device (3); the method is characterized in that: the supporting and clamping device (1) is uniformly provided with processing grooves, the left side and the right side in each processing groove are uniformly provided with side plastic coating devices (2), and the front side and the rear side in each processing groove are symmetrically provided with rear polishing devices (3);
the supporting and clamping device (1) comprises a bottom plate (11), a supporting frame (12), a top plate (13), clamping grooves (14) and a lower end clamping mechanism (15), wherein the supporting frame (12) is installed on the upper end surface of the bottom plate (11), the top plate (13) is installed on the upper end surface of the supporting frame (12), the clamping grooves (14) are uniformly formed in the top plate (13), and the lower end clamping mechanism (15) is uniformly installed on the upper end surface of the inner side of the bottom plate (11);
the side plastic-coated device (2) comprises a painting mechanism (21), a rotating support plate (22), a drive plate (23), a rotating ring plate (24), a plastic-spraying support frame (25), a painting groove (26) and a plastic-spraying head (27), wherein the rotating support plate (22) is uniformly installed inside a support frame (12), adjacent rotating support plates (22) are in a group, the drive plate (23) is installed on the inner surface of the rotating support plate (22), the rotating ring plate (24) is installed between the drive plates (23), the cross section of the rotating ring plate (24) is of an annular structure, the upper end of the rotating ring plate (24) is connected with a top plate (13) in a sliding clamping groove matching mode, the painting mechanism (21) is uniformly installed on the left and right of the inner surface of the rotating ring plate (24), the plastic-spraying support frame (25) is installed between the adjacent painting mechanisms (21), and the painting groove (26, a plastic spraying head (27) is arranged on the outer end surface of the coating groove (26);
the painting mechanism (21) comprises a painting support frame (211), a painting movable block (212), a painting buffer spring (213), a rotating support plate (214) and a painting rotary drum (215), the painting support frame (211) is uniformly arranged on the left and right sides of the inner surface of the rotating ring plate (24), the painting movable block (212) is arranged on the painting support frame (211) in a sliding fit mode, the painting buffer spring (213) is arranged between the painting movable block (212) and the painting support frame (211), the rotating support plate (214) is arranged on the outer end surface of the painting movable block (212), and the painting rotary drum (215) is arranged on the upper side and the lower side of the rotating support plate (214);
the brushing mechanisms (21) positioned on the left side and the right side of the inner surface of the rotating ring plate (24) are arranged in a zigzag staggered manner;
the rear polishing device (3) comprises a hydraulic rod (31), a polishing support plate (32), an electric rotating ring (33), a joint frame (34), a joint movable block (35), a joint spring (36), a polishing plate (37) and a polishing ball (38), the hydraulic rod (31) is symmetrically arranged on the front and back of the inner surface of the rotating ring plate (24), a polishing support plate (32) is arranged at the movable end of the hydraulic rod (31), an electric rotating ring (33) is arranged in the middle of the polishing support plate (32), a fitting frame (34) is arranged in the electric rotating ring (33), a fitting movable block (35) is arranged in the fitting frame (34) in a sliding fit mode, a fitting spring (36) is arranged between the fitting movable block (35) and the fitting frame (34), a polishing plate (37) is arranged on the outer end face of the fitting movable block (35), and polishing balls (38) are uniformly arranged on the outer end face of the polishing plate (37);
the production and manufacturing process of the plastic-coated steel pipe comprises the following steps:
step one, oil removal treatment: manually wiping, degreasing and deoiling the outer surface of the steel pipe to be processed by utilizing deoiling cloth to obtain a deoiled steel pipe;
step two, plastic coating treatment: performing surface plastic coating operation on the outer surface of the oil-removed steel pipe obtained in the step one by using outer surface plastic coating processing equipment to obtain a plastic-coated steel pipe;
step three, combined treatment: combining the plastic-coated steel pipes obtained in the second step, and combining the plastic-coated steel pipes by using bolts to obtain finished plastic-coated steel pipes;
step four, stacking treatment: and (4) coding the finished plastic-coated steel pipes, stacking the steel pipes in order, and conveying the steel pipes to a warehouse for storage.
2. The plastic-coated steel tube production and manufacturing process according to claim 1, which is characterized in that: the lower end clamping mechanism (15) comprises a sliding limiting rod (151), a clamping spring (152), a clamping plate (153) and a locking ring (154), the sliding limiting rod (151) is uniformly and symmetrically arranged on the upper end face of the bottom plate (11), the clamping plate (153) is arranged on the sliding limiting rod (151) in a sliding fit mode, the clamping spring (152) is arranged on the outer side of the sliding limiting rod (151), and the locking ring (154) is arranged on the inner side face of the clamping plate (153); the clamping spring (152) is matched with the locking ring (154) for use, so that the lower end of the steel pipe is clamped and fixed.
3. The plastic-coated steel tube production and manufacturing process according to claim 2, characterized in that: the clamping and fixing plate (153) is of an arc structure with a square lower side and an upper side, and the radian of the locking ring (154) is matched with the upper side of the clamping and fixing plate (153).
4. The plastic-coated steel tube production and manufacturing process according to claim 1, which is characterized in that: a sponge layer is arranged on the outer side of the brushing rotary drum (215).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207342.6A CN111360596B (en) | 2020-03-23 | 2020-03-23 | Plastic-coated steel pipe production and manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207342.6A CN111360596B (en) | 2020-03-23 | 2020-03-23 | Plastic-coated steel pipe production and manufacturing process |
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| CN111360596A CN111360596A (en) | 2020-07-03 |
| CN111360596B true CN111360596B (en) | 2021-01-05 |
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| CN202010207342.6A Active CN111360596B (en) | 2020-03-23 | 2020-03-23 | Plastic-coated steel pipe production and manufacturing process |
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| CN112091740B (en) * | 2020-09-08 | 2021-06-01 | 无锡隆昌兴模具钢材有限公司 | Tool steel production and processing technology |
| CN115228707B (en) * | 2022-06-22 | 2023-12-19 | 杭州林伟工贸有限公司 | Corrosion-resistant plastic spraying device for surface of welding net |
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| CN111360596A (en) | 2020-07-03 |
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