CN117841330A - Production process of graphene PVC pipe - Google Patents
Production process of graphene PVC pipe Download PDFInfo
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- CN117841330A CN117841330A CN202410037280.7A CN202410037280A CN117841330A CN 117841330 A CN117841330 A CN 117841330A CN 202410037280 A CN202410037280 A CN 202410037280A CN 117841330 A CN117841330 A CN 117841330A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000000314 lubricant Substances 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 14
- 239000000049 pigment Substances 0.000 claims abstract description 13
- 239000004848 polyfunctional curative Substances 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 238000001125 extrusion Methods 0.000 claims description 24
- 238000005520 cutting process Methods 0.000 claims description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 18
- 239000000498 cooling water Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 229910052788 barium Inorganic materials 0.000 claims description 12
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 12
- 238000004513 sizing Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 46
- 239000004800 polyvinyl chloride Substances 0.000 abstract description 46
- 239000000654 additive Substances 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production process of graphene PVC (polyvinyl chloride) pipes, which comprises the following steps of: s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment; s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained; s3: preparing a mixture: and uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, and putting the mixture into a high-speed mixer. The raw materials of the process are added with proper additives, wherein the stabilizer plays a role in inhibiting decomposition, the lubricant reduces friction among molecules, meanwhile, adhesion with metal equipment is avoided, the filler plays a role in increasing hardness and reducing cost, and meanwhile, various indexes are strictly controlled, so that the quality of products is ensured.
Description
Production process of graphene PVC pipe
Technical Field
The invention relates to the technical field of PVC pipes, in particular to a production process of graphene PVC pipes.
Background
PVC is mainly composed of polyvinyl chloride, and other components are added to strengthen one material of heat resistance, toughness and ductility; PVC pipe is a plastic pipe extruded by hot pressing method after being matched with PVC resin, stabilizer, lubricant, etc., and is generally used for drainage, transportation of waste water, chemicals, heating liquid and cooling liquid, transportation of food, ultra-pure liquid, slurry, gas, compressed air and vacuum system.
However, the production process of graphene PVC pipes in the current market is not very standard, and the quality of the produced pipes is not standard, so that small loss is caused to enterprises, therefore, the production process of graphene PVC pipes is provided for solving the problems.
Disclosure of Invention
Based on the technical problems in the background technology, the invention provides a production process of graphene PVC pipes.
The production process of the graphene PVC pipe provided by the invention comprises the following steps:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the tubing will be cut by an automatic cutter to a set length. After cutting is finished, burrs at two ends of the pipe are removed, and the influence on cutting precision caused by thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
Preferably, the barrel setting temperature of the injection molding machine is 170-200 ℃, and the mold setting temperature is 40-50 ℃.
Preferably, a certain hardener and pigment are added in the step S3, so that the hardness and the color of the pipe can be controlled.
Preferably, the vacuum degree of the vacuum shaping in the step S5 is generally controlled to be 0.02-0.05MPa, the water temperature is generally controlled to be 18-28 ℃, and spray water in the vacuum box is atomized.
Preferably, the quality detection in S7 includes aspects including appearance inspection, wall thickness measurement, load test, thermal deformation test, and the like.
Preferably, the cross section of the extruded pipe is used for observing whether the wall thickness of the pipe is symmetrical or not, and an adjusting screw on the extruding die can be adjusted until the wall thickness of the pipe is symmetrical, and the pipe is pumped by a host vacuum pump and is adjusted to the vacuum degree of-0.05-0.08.
Preferably, the extruder is preheated, and when the heating temperatures of the extruder and the machine head sections all reach the set temperature (soil 2C) and the constant temperature is kept for 90-150 minutes without great change, the extruder can be started to extrude the pipe.
Preferably, the extruded pipe in the step S4 needs to be communicated with cooling water, so that the temperature of the screw is reduced, the plasticizing quality is improved, and the temperature of the communicated cooling water of the screw is about 50-70.
Preferably, the drawing speed in S5 should be about 1% -10% faster than the extrusion speed of the pipe.
Preferably, the filler mainly uses calcium carbonate and barium (barite powder), the calcium carbonate ensures that the surface property of the pipe is good, and the barium can improve the formability, so that the pipe is easy to shape.
The invention has the beneficial effects that: .
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Example 1
In this embodiment, a production process of graphene PVC pipe is provided, including the following steps:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the tubing will be cut by an automatic cutter to a set length. After cutting is finished, burrs at two ends of the pipe are removed, and the influence on cutting precision caused by thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
In this example, the barrel set temperature of the injection molding machine was 170 ℃, and the mold set temperature was 40 ℃.
In this embodiment, a certain amount of hardener and pigment are added in S3, so that the hardness and color of the pipe can be controlled.
In this embodiment, the vacuum degree of vacuum shaping in S5 is generally controlled at 0.02MPa, the water temperature is generally controlled at 18 ℃, and spray water in the vacuum box should be atomized.
In this embodiment, the quality detection in S7 includes various aspects including appearance inspection, wall thickness measurement, load test, thermal deformation test, and the like.
In this example, the cross section of the extruded tube was inspected to see if the wall thickness of the tube was uniform, and the adjustment screw on the extrusion die was adjusted until the wall thickness of the tube was uniform, and the tube was pumped through the host vacuum pump and adjusted to a vacuum level of-0.05.
In the embodiment, the extruder is preheated, and when the heating temperatures of the extruder barrel and each section of the extruder head all reach the set temperature (soil 2C) and the extruder barrel is kept constant for 90 minutes without great change, the extruder barrel can be started.
In the embodiment, the cooling water is required to be introduced into the extruded pipe in the step S4, so that the temperature of the screw is reduced, the plasticizing quality is improved, and the temperature of the cooling water introduced into the screw is about 50.
In this example, the drawing speed in S5 should be about 1% faster than the extrusion speed of the tubing.
In this embodiment, the filler is mainly calcium carbonate and barium (barite powder), and the calcium carbonate ensures that the surface property of the pipe is good, and the barium can improve the formability, so that the pipe is easy to shape.
Example two
In this embodiment, a production process of graphene PVC pipe is provided, including the following steps:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the tubing will be cut by an automatic cutter to a set length. After cutting is finished, burrs at two ends of the pipe are removed, and the influence on cutting precision caused by thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
In this example, the barrel set temperature of the injection molding machine was 180℃and the mold set temperature was 45 ℃.
In this embodiment, a certain amount of hardener and pigment are added in S3, so that the hardness and color of the pipe can be controlled.
In this embodiment, the vacuum degree of the vacuum shaping in S5 is generally controlled to be 0.03MPa, the water temperature is generally controlled to be 19 ℃, the spray water in the vacuum box should be atomized, and the quality detection in S7 includes aspects including appearance inspection, wall thickness measurement, load test, thermal deformation test, and the like.
In this embodiment, the cross section of the extruded tube is inspected to see if the wall thickness of the tube is uniform, and the adjusting screw on the extrusion die can be adjusted until the wall thickness of the tube is uniform, and the tube is pumped through the host vacuum pump and adjusted to a vacuum level of-0.06.
In the embodiment, the extruder is preheated, and when the heating temperatures of the extruder barrel and each section of the extruder head all reach the set temperature (soil 2C) and the constant temperature is kept for 110 minutes without great change, the extruder can be started to extrude the pipe.
In the embodiment, the cooling water is required to be introduced into the extruded pipe in the step S4, the temperature of the screw is reduced, the plasticizing quality is favorably improved, the temperature of the cooling water introduced into the screw is about 55%, the traction speed in the step S5 is about 4% faster than the extrusion speed of the pipe, and the filler mainly adopts calcium carbonate and barium (barite powder), so that the surface performance of the pipe is good, and the barium can improve the formability, so that the pipe is easy to shape.
Example III
In this embodiment, a production process of graphene PVC pipe is provided, including the following steps:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the tubing will be cut by an automatic cutter to a set length. After cutting is finished, burrs at two ends of the pipe are removed, and the influence on cutting precision caused by thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
In this example, the barrel set temperature of the injection molding machine was 190 ℃ and the mold set temperature was 48 ℃.
In this embodiment, a certain amount of hardener and pigment are added in S3, so that the hardness and color of the pipe can be controlled.
In this embodiment, the vacuum degree of the vacuum shaping in S5 is generally controlled to be 0.04MPa, the water temperature is generally controlled to be 25 ℃, the spray water in the vacuum box should be atomized, and the quality detection in S7 includes aspects including appearance inspection, wall thickness measurement, load test, thermal deformation test, and the like.
In this example, the cross section of the extruded tube was inspected to see if the tube wall thickness was uniform, and the adjustment screw on the extrusion die was adjusted until the tube wall thickness was uniform, and the tube wall thickness was adjusted to-0.07 vacuum by the host vacuum pump.
In the embodiment, the extruder is preheated, and when the heating temperatures of the extruder and each section of the machine head all reach the set temperature (soil 2C) and the constant temperature is kept for 120 minutes without great change, the pipe extrusion can be started, cooling water is required to be introduced into the extruded pipe in S4, the temperature of the screw is reduced, the plasticizing quality is favorably improved, the temperature of the introduced cooling water is about 60 percent, the traction speed in S5 is about 8 percent faster than the extrusion speed of the pipe, and the filler mainly uses calcium carbonate and barium (barite powder), so that the surface performance of the pipe is good, the barium can improve the formability, and the pipe is easy to shape.
Example IV
In this embodiment, a production process of graphene PVC pipe is provided, including the following steps:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the tubing will be cut by an automatic cutter to a set length. After cutting is finished, burrs at two ends of the pipe are removed, and the influence on cutting precision caused by thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
In this embodiment, the barrel setting temperature of the injection molding machine is 200 ℃, the mold setting temperature is 50 ℃, and a certain amount of hardener and pigment are added in S3, so that the hardness and color of the pipe can be controlled, the vacuum degree of vacuum forming in S5 is generally controlled to be 0.05MPa, the water temperature is generally controlled to be 18-28 ℃, spray water in a vacuum box is atomized, and quality detection in S7 includes aspects including appearance inspection, wall thickness measurement, load test, thermal deformation test and the like.
In the embodiment, whether the wall thickness of the pipe is symmetrical or not is observed from the cross section of the extruded pipe, the adjusting screw on the extruding die can be adjusted until the wall thickness of the pipe is symmetrical, the main machine vacuum pump is used for adjusting the wall thickness to be-0.08 vacuum degree, and the extruder is preheated, so that the pipe can be started up for extruding when the heating temperatures of the machine and each section of the machine head completely reach the set temperature (soil 2C) and the constant temperature is kept for 150 minutes without great change.
In the embodiment, the cooling water is required to be introduced into the extruded pipe in the step S4, the temperature of the screw is reduced, the plasticizing quality is favorably improved, the temperature of the cooling water introduced into the screw is about 70%, the traction speed in the step S5 is about 10% faster than the extrusion speed of the pipe, and the filler mainly adopts calcium carbonate and barium (barite powder), so that the surface performance of the pipe is good, and the barium can improve the formability, so that the pipe is easy to shape.
The process comprises the following steps: the raw materials are added with proper additives, wherein the stabilizer plays a role in inhibiting decomposition, the lubricant reduces friction among molecules, meanwhile, adhesion with metal equipment is avoided, the filler plays a role in increasing hardness and reducing cost, and meanwhile, various indexes are strictly controlled, so that the quality of a product is ensured.
The graphene PVC pipe in the above embodiment was tested to obtain the data in Table 1 below
The results show that, and example four is the best example.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The production process of the graphene PVC pipe is characterized by comprising the following steps of:
s1: material preparation: weighing materials of a surface treating agent, graphene, PVC resin, a stabilizer, a lubricant, a filler, a hardener and pigment;
s2: pretreatment: adding the surface treating agent in the step S1 and graphene into a mixer for preliminary mixing, so that graphene particles can be obtained;
s3: preparing a mixture: uniformly mixing graphene particles with materials such as pre-weighed PVC resin, a stabilizer, a lubricant, a filler and the like, putting the mixture into a high-speed mixer, and uniformly mixing various materials under the action of a scraper and a screw rod which rotate at a high speed to form a PVC mixture;
s4: extrusion molding: after the extruder is started and preheated, conveying the PVC mixture into the extruder, gradually compressing and heating the mixture by a screw rod in the extruder to melt and coke the mixture, and finally extruding the melted PVC mixture from a die;
s5: vacuum diameter-fixed sleeve: the extruded pipe can be pulled into the sizing device through the tractor, and the vacuum cooling shaping is realized by absorbing the outer wall of the pipe blank on the inner wall of the sizing sleeve by means of negative pressure formed by the vacuum pump under the cooling water spray cooling:
s6: the cooling pipe is cooled by soaking cooling or water spraying cooling after extrusion, the pipe gradually contracts at different temperatures during soaking cooling, a normal cylindrical shape is finally formed, and in the water spraying cooling process, the pipe is cooled by water spraying, so that the contraction is more perfect, and the surface smoothness and appearance of the pipe are ensured;
s7: cutting: after cooling, the pipe is cut by an automatic cutting machine according to a set length, burrs at two ends of the pipe are removed after the cutting is finished, and the influence on cutting precision due to thermal deformation of the pipe is avoided by a water spray cooling mode;
s8: and (3) detection: and (3) detecting the quality of the cut pipe, detecting that the pipe needs to be detected after the production is finished, and finally packaging or shipping the qualified pipe after the pipe is detected to be qualified.
2. The production process of the graphene PVC pipe according to claim 1, wherein the barrel setting temperature of the injection molding machine is 170-200 ℃, and the mold setting temperature is 40-50 ℃.
3. The process for producing graphene PVC pipes according to claim 1, wherein a certain hardener and pigment are added in S3, so as to control the hardness and color of the pipes.
4. The process for producing graphene PVC pipe according to claim 1, wherein the vacuum degree of vacuum shaping in the step S5 is generally controlled to be 0.02-0.05MPa, the water temperature is generally controlled to be 18-28 ℃, and spray water in a vacuum box is atomized.
5. The production process of the graphene PVC pipe according to claim 1, wherein the quality detection in S7 comprises aspects of appearance inspection, wall thickness measurement, load test, thermal deformation test and the like.
6. The process for producing graphene PVC pipes according to claim 1, wherein the inspection of the wall thickness of the pipe from the cross section of the extruded pipe is performed by adjusting the adjusting screw on the extrusion die until the wall thickness of the pipe is uniform, and the pipe is passed through the host vacuum pump and adjusted to a vacuum level of-0.05 to 0.08.
7. The production process of the graphene PVC pipe according to claim 1, wherein the pipe extrusion can be started when the heating temperatures of the extruder, the machine tool and the machine head all reach the set temperature (soil 2C) and the constant temperature is kept for 90-150 minutes without great change by preheating the extruder.
8. The production process of the graphene PVC pipe according to claim 1, wherein the cooling water is required to be introduced into the extruded pipe in the step S4, so that the temperature of the screw is reduced, the plasticizing quality is improved, and the temperature of the cooling water introduced into the screw is about 50-70.
9. The process for producing graphene PVC pipe according to claim 1, wherein the drawing speed in S5 is about 1% -10% faster than the extrusion speed of the pipe.
10. The process for producing graphene PVC pipe according to claim 1, wherein the filler mainly uses calcium carbonate and barium (barite powder), the calcium carbonate ensures that the surface performance of the pipe is good, and the barium can improve the formability and facilitate the shaping of the pipe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118124114A (en) * | 2024-05-07 | 2024-06-04 | 鄂尔多斯市东澳管业有限公司 | Preparation method of graphene composite PVC antibacterial pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118124114A (en) * | 2024-05-07 | 2024-06-04 | 鄂尔多斯市东澳管业有限公司 | Preparation method of graphene composite PVC antibacterial pipe |
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