CN112594455A - Poly steel pipe and production process thereof - Google Patents
Poly steel pipe and production process thereof Download PDFInfo
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- CN112594455A CN112594455A CN202011504323.6A CN202011504323A CN112594455A CN 112594455 A CN112594455 A CN 112594455A CN 202011504323 A CN202011504323 A CN 202011504323A CN 112594455 A CN112594455 A CN 112594455A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title description 9
- 239000010410 layer Substances 0.000 claims abstract description 66
- 239000000835 fiber Substances 0.000 claims abstract description 62
- 239000002861 polymer material Substances 0.000 claims abstract description 40
- 238000004804 winding Methods 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 239000002346 layers by function Substances 0.000 claims abstract description 23
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 21
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 27
- -1 polyethylene Polymers 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 229920001169 thermoplastic Polymers 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 150000001805 chlorine compounds Chemical class 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 239000004800 polyvinyl chloride Substances 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 5
- 229920002748 Basalt fiber Polymers 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004801 Chlorinated PVC Substances 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
- 229920006231 aramid fiber Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000012784 inorganic fiber Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 229920003253 poly(benzobisoxazole) Polymers 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001723 curing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000005007 epoxy-phenolic resin Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 238000001029 thermal curing Methods 0.000 claims description 3
- 238000007666 vacuum forming Methods 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 238000004880 explosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 229920001688 coating polymer Polymers 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229920001002 functional polymer Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a polymer steel pipe which comprises an inner wall functional layer, wherein an inner reinforcing fiber polymer material base layer is arranged on the outer side of the inner wall functional layer, a reinforcing fiber composite material winding braid layer is arranged on the outer side of the inner reinforcing fiber polymer material base layer, and an outer coating polymer material protective layer is arranged on the outer side of the reinforcing fiber composite material winding braid layer. The inner wall functional layer, the inner reinforced fiber polymer material base layer, the reinforced fiber composite material winding braid layer and the outer coated polymer material protective layer are arranged from inside to outside, wherein the inner wall functional layer mainly improves the wear resistance and the corrosion resistance of the steel gathering pipe, the inner reinforced fiber polymer material base layer and the reinforced fiber composite material winding braid layer mainly improve the structural strength, the ring stiffness, the anti-explosion pressure and the anti-bending strength of the steel gathering pipe, and the outer coated polymer material protective layer mainly plays a role in protecting the steel gathering pipe.
Description
Technical Field
The invention belongs to the technical field of steel-gathering pipes, and particularly relates to a steel-gathering pipe and a production process thereof.
Background
In municipal water supply, sewage, power pipelines and the like, the traditional cast iron pipes, plastic pipes, glass fiber reinforced plastic pipes and cement pipes are widely used, but each pipeline has certain defects and shortcomings. For example, cast iron pipes are heavy and solid, but the inner wall needs to be treated, and the environmental protection problem exists, large-caliber pe pipes are smooth in inner wall, light in weight, convenient to install, large in mass dispersibility of plastic pipes, poor in stability of anti-explosion pressure, and often have a pipe explosion phenomenon, and are easy to dig up and break, the quality problem often occurs due to uncontrollable property of a manufacturing process of glass steel pipes, although cement pipes have been used as running water pipes in the past, the cement pipes are aged continuously for a long time, pipe explosion is a frequent phenomenon, the cement pipes as sewage pipes can not treat alkaline and acidic sewage due to natural properties of the cement pipes, and the sealing of the cement pipes as the joints of the rainwater pipes is not a general benefit. Therefore, we propose a poly-steel pipe and its production process, which combines the strength and rigidity of cast iron pipe, and the lightness, sanitation and lightness of plastic pipe, and can overcome many disadvantages of traditional pipe.
Disclosure of Invention
The invention aims to provide a steel tube and a production process thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a gather steel pipe, includes the inner wall functional layer, reinforcing fiber polymeric material basic unit is equipped with in the outside of inner wall functional layer, the outside of interior reinforcing fiber polymeric material basic unit is equipped with reinforcing fiber combined material winding weaving layer, the outside of reinforcing fiber combined material winding weaving layer is equipped with outer cladding polymeric material protective layer.
Preferably, the inner wall functional layer is made of one or a mixture of more of silicone rubber, silicone mixed plastic, ethylene propylene diene monomer, pps material, peek material, ultrahigh density polyethylene, polypropylene, polyethylene and polyvinyl chloride.
Preferably, the raw material of the inner reinforced fiber polymer material base layer is one or a mixture of more of thermoplastic polymers, polypropylene series, polyethylene series, polyvinyl chloride series, chlorinated polyvinyl chloride series, ABS series, PET series, peek series and engineering plastics.
Preferably, the reinforcing fiber composite winding braid is formed by circumferentially and axially arranging the inner reinforcing fiber polymeric material base layer after dipping the continuous fibers, and the continuous fibers are dipped by the fiber dip.
Preferably, the continuous fibers are one or a mixture of more of inorganic fibers, glass fibers, basalt fibers, carbon fibers, aramid fibers and PBO fibers, the fiber impregnates are thermosetting series impregnates or thermoplastic series impregnates, the thermosetting series impregnates are one or a mixture of more of epoxy resins, phenolic resins and unsaturated resins, and the thermoplastic series impregnates are one or a mixture of more of pe, pp, pvc, pps, peek and abs.
A production process of a poly-steel pipe specifically comprises the following steps:
s1, multi-layer co-extrusion: extruding the raw materials into a composite die head by a plurality of extruders at the same time, wherein the raw materials of all layers are converged into a whole in the die head or outside the die head, and an inner reinforced fiber polymeric material base layer is formed outside an inner wall functional layer;
s2, vacuum forming: cooling and shaping the raw material extruded in the step S1 in vacuum;
s3, winding continuous fibers: after the continuous fibers are impregnated, the inner reinforcing fiber polymer material base layer (2) is arranged annularly and axially, and a reinforcing fiber composite material winding braid layer is formed on the outer side of the inner reinforcing fiber polymer material base layer;
s4, thermal curing: heating and curing the raw material obtained in the step S3;
and S5, extruding the surface, shaping, and finally cutting into the required size.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a steel pipe and a production process thereof.A functional layer of an inner wall, a basic layer of an inner reinforced fiber polymer material, a winding braid layer of a reinforced fiber composite material and an outer covering polymer material protective layer are arranged from inside to outside, wherein the functional layer of the inner wall mainly improves the wear resistance and corrosion resistance of the steel pipe, the basic layer of the inner reinforced fiber polymer material and the winding braid layer of the reinforced fiber composite material mainly improve the structural strength, ring stiffness, anti-explosion pressure and anti-bending strength of the steel pipe, and the outer covering polymer material protective layer mainly plays a role in protecting the steel pipe.
Drawings
FIG. 1 is a schematic side sectional view of the present invention;
fig. 2 is a schematic cross-sectional structure of the present invention.
In the figure: 1 inner wall functional layer, 2 inner reinforced fiber polymer material basic layer, 3 reinforced fiber composite material winding braid layer, 4 outer cladding polymer material protective layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a steel tube as shown in fig. 1-2, which comprises an inner wall functional layer 1, wherein an inner reinforced fiber polymer material base layer 2 is arranged on the outer side of the inner wall functional layer 1, a reinforced fiber composite material winding woven layer 3 is arranged on the outer side of the inner reinforced fiber polymer material base layer 2, and an outer coated polymer material protective layer 4 is arranged on the outer side of the reinforced fiber composite material winding woven layer 3.
Specifically, the inner wall functional layer 1 is made of one or a mixture of more of silicone rubber, silicone mixed plastic, ethylene propylene diene monomer, pps material, peek material, ultrahigh density polyethylene, polypropylene, polyethylene and polyvinyl chloride.
Specifically, the raw material of the inner reinforced fiber polymer material base layer 2 is a mixture of one or more of thermoplastic polymers, polypropylene series, polyethylene series, polyvinyl chloride series, chlorinated polyvinyl chloride series, ABS series, PET series, peek series and engineering plastics.
Specifically, the reinforcing fiber composite material winding braid layer 3 is subjected to circumferential and axial arrangement on the inner reinforcing fiber polymer material base layer 2 after impregnation through continuous fibers, and the continuous fibers are subjected to impregnation through fiber impregnants.
Specifically, the continuous fibers are one or a mixture of several of inorganic fibers, glass fibers, basalt fibers, carbon fibers, aramid fibers and PBO fibers, the fiber impregnates are thermosetting series impregnates or thermoplastic series impregnates, the thermosetting series impregnates are one or a mixture of several of epoxy resins, phenolic resins and unsaturated resins, and the thermoplastic series impregnates are one or a mixture of several of pe, pp, pvc, pps, peek and abs.
A production process of a poly-steel pipe specifically comprises the following steps:
s1, multi-layer co-extrusion: extruding the raw materials into a composite die head by a plurality of extruders at the same time, wherein the raw materials of all layers are converged into a whole in or outside the die head, and an inner reinforced fiber polymeric material base layer 2 is formed outside an inner wall functional layer 1;
s2, vacuum forming: cooling and shaping the raw material extruded in the step S1 in vacuum;
s3, winding continuous fibers: after gum dipping, the continuous fibers are arranged on the inner reinforcing fiber polymer material base layer 2 in the circumferential direction and the axial direction, and a reinforcing fiber composite material winding braid layer 3 is formed on the outer side of the inner reinforcing fiber polymer material base layer 2;
s4, thermal curing: heating and curing the raw material obtained in the step S3;
and S5, extruding the surface, shaping, and finally cutting into the required size.
Steel pipe concept of poly: the high molecular polymer and the continuous fiber reinforced material are combined in different forms or structurally optimized to form the pipeline, so that the pipeline can meet the requirements of different occasions, and has the characteristics of good environmental sanitation performance, high bursting pressure resistance, high ring steel degree, strong bearing capacity, light weight, long service life, weather resistance and good aging resistance compared with the traditional pipe.
The steel gathering pipe comprises:
a. the functional polymer material and the material polymer are combined in a layered way, and the requirements for distinguishing all layers are very clear;
b. the thermoplastic material and the thermosetting material in the high polymer material are layered and bonded;
c. the reinforcing material continuous fiber and the thermoplastic material or the thermosetting material in the high polymer material are mutually infiltrated;
d. the combination of circumferential cloth threads and axial cloth threads of the reinforcing material;
f. the multilayer is formed and combined independently;
J. the integrity of the pipe is ensured, and interface treatment is carried out to maintain the bonding strength between each layer.
Inner wall functional layer 1: the material is mainly a functional material which is endowed aiming at different conveying media or purposes, such as a material which is clean and sanitary in the water conveying requirement, corrosion resistant in sewage, oil resistant in the oil conveying requirement, lubricating in the cable pipeline passing requirement, wear resistant in the conveying powder material requirement and the like;
the materials of the inner wall functional layer 1 mainly comprise: silicon rubber, silicone mixed plastic, ethylene propylene diene monomer, pps material, peek material, ultrahigh density polyethylene, polypropylene, polyethylene and polyvinyl chloride;
high lubricating performance: silicone-modified pp, silicone-modified pp; high wear resistance: ultra-high density polyethylene, polytetrafluoroethylene; high corrosion resistance: pp, pe, pps, peek; cleaning and sanitation properties: pp, pe.
The inner reinforced fiber polymer material base layer 2 is a main material layer formed according to different high molecular polymers, and plays a role in forming a reinforced bonding reinforcing layer;
the high molecular polymer comprises: thermoplastic polymers, polypropylene series, polyethylene series, polyvinyl chloride series, chlorinated polyvinyl chloride series, ABS series, PET series, peek series, engineering plastics, etc
The reinforced fiber composite material winding braid layer 3 is formed by annularly and axially arranging the pipeline of the basic layer through continuous fiber impregnation, and the strength, the annular rigidity, the temperature resistance, the pressure resistance and the explosion resistance of the pipeline can reach the optimal values. Interface treatment is considered when the resin and the resin of the base layer are not uniform, so that the base layer and the enhancement layer are fully combined;
the fiber impregnates are as follows:
thermosetting series: epoxy resin, phenolic resin, unsaturated resin;
thermoplastic series: pe, pp, pvc, pps, peek, abs.
The continuous fibers are: inorganic fiber, glass fiber, basalt fiber, carbon fiber, aramid fiber, PBO fiber, and the like
Circumferential arrangement: the continuous wire distribution is carried out around the pipeline in the radial direction, so that the rigidity, the anti-explosion capability and the anti-compression flat force of the pipeline ring are increased;
A. single-layer or multi-layer unidirectional winding at 0-90 degrees,
B. a single-layer or multi-layer bidirectional cross winding at 0-90 degrees,
C. weaving at 0-90 degrees, and weaving at 0-90 degrees with lining yarns, including stitch-knitting, circular knitting and the like;
D. axial filament arrangement: namely, continuous wire distribution is carried out along the longitudinal direction of the pipeline, so that the bending strength of the pipeline is increased.
The outer protective layer 4 of polymer material is a material that is disposed according to the environment of the outer surface that the pipe is exposed to, such as weather resistance, aging resistance for outdoor use, corrosion resistance for seawater use, and the like.
In summary, compared with the prior art, the inner wall functional layer 1, the inner reinforced fiber polymer material base layer 2, the reinforced fiber composite material winding braid layer 3 and the outer coated polymer material protective layer 4 are arranged from inside to outside, wherein the inner wall functional layer 1 mainly improves the wear resistance and corrosion resistance of the steel pipe, the inner reinforced fiber polymer material base layer 2 and the reinforced fiber composite material winding braid layer 3 mainly improve the structural strength, ring stiffness, anti-burst pressure and anti-bending strength of the steel pipe, and the outer coated polymer material protective layer 4 mainly plays a role in protecting the steel pipe.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a gather steel pipe, includes inner wall functional layer (1), its characterized in that: the outer side of the inner wall functional layer (1) is provided with an inner reinforced fiber polymer material base layer (2), the outer side of the inner reinforced fiber polymer material base layer (2) is provided with a reinforced fiber composite material winding woven layer (3), and the outer side of the reinforced fiber composite material winding woven layer (3) is provided with an outer coated polymer material protective layer (4).
2. A polymer tube according to claim 1, wherein: the inner wall functional layer (1) is made of one or a mixture of more of silicone rubber, silicone mixed plastic, ethylene propylene diene monomer, pps material, peek material, ultrahigh density polyethylene, polypropylene, polyethylene and polyvinyl chloride.
3. A polymer tube according to claim 1, wherein: the raw material of the inner reinforced fiber polymer material base layer (2) is one or a mixture of more of thermoplastic polymers, polypropylene series, polyethylene series, polyvinyl chloride series, chlorinated polyvinyl chloride series, ABS series, PET series, peek series and engineering plastics.
4. A polymer tube according to claim 1, wherein: the reinforced fiber composite material winding braid layer (3) is subjected to circumferential and axial arrangement on the inner reinforced fiber polymer material base layer (2) after impregnation through continuous fibers, and the continuous fibers are subjected to impregnation through fiber impregnants.
5. The polymer steel pipe according to claim 4, wherein: the continuous fiber is one or a mixture of more of inorganic fiber, glass fiber, basalt fiber, carbon fiber, aramid fiber and PBO fiber, the fiber impregnant is a thermosetting series impregnant or a thermoplastic series impregnant, the thermosetting series impregnant is one or a mixture of more of epoxy resin, phenolic resin and unsaturated resin, and the thermoplastic series impregnant is one or a mixture of more of pe, pp, pvc, pps, peek and abs.
6. A process for producing a poly-steel pipe according to claim 1, characterized in that: the method specifically comprises the following steps:
s1, multi-layer co-extrusion: extruding raw materials into a composite die head by a plurality of extruders at the same time, wherein the raw materials of all layers are converged into a whole in the die head or outside the die head, and an inner reinforced fiber polymer material base layer (2) is formed outside an inner wall functional layer (1);
s2, vacuum forming: cooling and shaping the raw material extruded in the step S1 in vacuum;
s3, winding continuous fibers: after gum dipping, the continuous fibers are arranged on the inner reinforcing fiber polymer material base layer (2) in the circumferential direction and the axial direction, and a reinforcing fiber composite material winding braid layer (3) is formed on the outer side of the inner reinforcing fiber polymer material base layer (2);
s4, thermal curing: heating and curing the raw material obtained in the step S3;
and S5, extruding the surface, shaping, and finally cutting into the required size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504323.6A CN112594455A (en) | 2020-12-18 | 2020-12-18 | Poly steel pipe and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504323.6A CN112594455A (en) | 2020-12-18 | 2020-12-18 | Poly steel pipe and production process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112594455A true CN112594455A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011504323.6A Pending CN112594455A (en) | 2020-12-18 | 2020-12-18 | Poly steel pipe and production process thereof |
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| Country | Link |
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| CN (1) | CN112594455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059894A (en) * | 2021-04-20 | 2021-07-02 | 宁波盒象科技有限公司 | Production process of high-strength plate |
-
2020
- 2020-12-18 CN CN202011504323.6A patent/CN112594455A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059894A (en) * | 2021-04-20 | 2021-07-02 | 宁波盒象科技有限公司 | Production process of high-strength plate |
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Application publication date: 20210402 |