CN110425345B - High-strength PVC (polyvinyl chloride) pipe and processing technology thereof - Google Patents
High-strength PVC (polyvinyl chloride) pipe and processing technology thereof Download PDFInfo
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- CN110425345B CN110425345B CN201910748896.4A CN201910748896A CN110425345B CN 110425345 B CN110425345 B CN 110425345B CN 201910748896 A CN201910748896 A CN 201910748896A CN 110425345 B CN110425345 B CN 110425345B
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- 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
- F16L9/006—Rigid pipes specially profiled
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- 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
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a high-strength PVC (polyvinyl chloride) pipe, which comprises a PVC layer, an adhesive layer and a carbon fiber cloth layer, wherein the carbon fiber cloth layer is wrapped outside the PVC layer through the adhesive layer, the outer surface of the PVC layer is provided with a plurality of reinforcing connecting grooves, the inner side of the PVC layer is horizontally provided with four reinforcing ribs, and the PVC layer comprises the following raw material components in parts by weight: 30-35 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of ethylene propylene rubber, 5-8 parts of acetylene-propylene copolymer, 2-4 parts of stabilizer, 8-12 parts of filler and 1-3 parts of beta-cyclodextrin; the reinforcing rib is used for improving the internal supporting strength of the PVC pipe, and is convenient to use in actual life.
Description
Technical Field
The invention relates to the field of PVC (polyvinyl chloride) pipes, in particular to a high-strength PVC pipe and a processing technology thereof.
Background
PVC is a material which is mainly composed of polyvinyl chloride and is added with other components to enhance the heat resistance, toughness and ductility of the PVC, the uppermost layer of the surface film is paint, the middle main component is polyvinyl chloride, and the lowermost layer is back-coated with adhesive; the PVC pipe is formed by extrusion by a hot pressing method after the PVC resin is matched with a stabilizer, a lubricant and the like, and is a plastic pipe which is developed and applied at the earliest time; PVC-U pipe has strong corrosion resistance, easy adhesion, low price and hard texture, but is only suitable for water supply systems with the conveying temperature not exceeding 45 ℃ due to the seepage of PVC-U monomer and additives, and plastic pipelines are used for drainage, waste water, chemicals, heating liquid and cooling liquid, food, ultrapure liquid, slurry, gas, compressed air and vacuum systems.
The flexibility of the existing PVC pipe is inferior to that of other plastic pipes, the thermal stability and the impact resistance are poor, the brittleness is easily generated in the using process of rigid or soft PVC, the strength of the existing PVC pipe is not enough in the using process, and the existing PVC pipe is easily damaged in the using process.
Disclosure of Invention
The invention aims to provide a high-strength PVC pipe and a processing technology thereof, aiming at overcoming the technical problems that the flexibility of the existing PVC pipe is inferior to that of other plastic pipes, the thermal stability and the impact resistance are poor, the brittleness is easily generated in the using process of rigid or soft PVC, the strength of the PVC pipe is insufficient in the using process, and the PVC pipe is easily damaged in the using process.
The purpose of the invention can be realized by the following technical scheme:
a high-strength PVC pipe comprises a PVC layer, an adhesive layer and a carbon fiber cloth layer, wherein the carbon fiber cloth layer is wrapped outside the PVC layer through the adhesive layer, a plurality of reinforcing connecting grooves are formed in the outer surface of the PVC layer, and four reinforcing ribs are horizontally arranged in the inner side of the PVC layer;
the PVC layer comprises the following raw material components in parts by weight: 30-35 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of ethylene propylene rubber, 5-8 parts of acetylene-propylene copolymer, 2-4 parts of stabilizer, 8-12 parts of filler and 1-3 parts of beta-cyclodextrin.
As a further scheme of the invention: the adhesive layer is a two-component modified epoxy resin adhesive.
A processing technology of a high-strength PVC pipe comprises the following specific steps:
the method comprises the following steps: mixing the following raw materials: adding PVC resin, chlorinated polyethylene, ethylene propylene rubber, acetylene-propylene copolymer, a stabilizer, a filler and beta-cyclodextrin into a hot mixer, fully stirring until the temperature rises to 125 ℃, stirring for 10 minutes, cooling by a low-speed mixer, stirring at 45 ℃ at low speed, bagging for later use, stirring for 8 minutes, starting the hot mixer after adding PVC resin particles in order to ensure that the raw materials are fully contacted with the PVC resin particles and reduce the mutual adsorption effect, and then sequentially adding other raw materials;
step two: the stirred material was carried into the extruder, the extruder screw being divided into 3 zones: add the material feeding section (material feeding section), melt section (compression section), measurement section (homogenization section), these three corresponding 3 functional areas of having constituteed the material: the PVC layer is extruded by an extruding machine under the coordination of an extruding die head, wherein the extruding die head is divided into an outer die and an inner die, the gap between the outer die and the inner die is the thickness of the extruded PVC layer, a plurality of inner bulges uniformly arranged on the inner side of the outer die form reinforcing connecting grooves on the outer side of the PVC layer, four semicircular reinforcing rib grooves uniformly formed on the outer side of the inner die form reinforcing ribs on the inner side of the PVC layer, the temperature of a charging barrel of the solid conveying area is controlled to be 100-140 ℃, the solid conveying area is shortened, the lengths of the plasticizing area and the melt conveying area are improved, good plasticization is ensured, and the product quality is ensured to be excellent; the temperature of a material plasticizing area is controlled to be 170-190 ℃, the vacuum degree of the charging barrel is 0.08-0.09 MPa, the normal vacuum degree is ensured, the good exhaust effect is further ensured, and bubbles are prevented from being stored in the pipe; the temperature of the melt conveying area is 160-180 ℃, the rotating speed of the screw is generally 20-30 r/min, and the improvement of the rotating speed of the screw, the reduction of the resistance of the machine head and the improvement of the pressure in the plasticizing area are all beneficial to the improvement of the conveying speed;
step three: the vacuum groove is vacuumized by the vacuum pump, the PVC layer is adsorbed on the inner wall of the sizing sleeve, the sizing is completed by adjusting the vacuum degree according to the outer diameter of the PVC layer, the PVC layer after the sizing is separated from the sizing copper sleeve under the action of the tractor to enter the cooling water tank, the vacuum forming machine and the cooling water tank are drawn out after spray cooling or soaking cooling, and the process conditions of vacuum forming are as follows: the vacuum degree is 20.0-53.3kPa, the water temperature is 15-25 ℃, the water in the vacuum groove is in a mist shape, meanwhile, a certain traction force and a traction speed are provided for the pipe extruded by the extrusion die head through the traction device, the pipe is uniformly led out, and the wall thickness of the pipe is adjusted by adjusting the traction speed. The traction speed depends on the extrusion speed, and generally the traction speed is 1 to 3 percent faster than the extrusion speed;
step four: spraying a layer of double-component modified epoxy resin adhesive on a formed PVC layer through a gluing device, wrapping carbon fiber cloth on the surface of the PVC layer to form a carbon fiber cloth layer, placing coiled carbon fiber cloth on a placement roller, enabling one end of the carbon fiber cloth to pass through the bottoms of a glue spreading roller and a movable slide rail respectively, enabling a glue pump to work to pressurize and convey the double-component modified epoxy resin adhesive in a glue tank into a hollow structure of the glue spreading roller when the carbon fiber cloth passes through the bottom of the glue spreading roller, discharging the double-component modified epoxy resin adhesive from a glue discharge hole under the pressurized condition, adsorbing the glue on the outer surface of the glue spreading roller through gluing bristles, driving the glue spreading roller to rotate at a constant speed by a servo motor when the carbon fiber cloth passes through the bottom of the glue spreading roller, and uniformly spreading the double-component modified epoxy resin adhesive on the top side of the carbon fiber cloth to finish gluing, then when the carbon fiber cloth passes through the bottom of the movable sliding rail, the carbon fiber cloth is uniformly cut into required length by the laser cutting head moving back and forth on the movable sliding rail, and then the cut carbon fiber cloth is pasted on the outer side of the PVC layer and then dried by the double-component modified epoxy resin adhesive to complete production.
As a further scheme of the invention: step four, the carbon fiber cloth comprises the following raw materials in parts by mass: 10-25 parts of polyacrylonitrile-based carbon fiber cloth, 60-80 parts of glass fiber unidirectional cloth, 5-20 parts of graphene powder and 15-30 parts of epoxy resin;
the carbon fiber cloth is prepared by the following process: preparing a carbon fiber resin film, softening an epoxy resin raw material, adding graphene, uniformly stirring, and putting into a coating machine to prepare the carbon fiber resin film; the glass fiber unidirectional cloth is clamped between two layers of carbon fiber resin films, and is formed by covering a layer of polyacrylonitrile-based carbon fiber cloth after heating and rolling, then covering a layer of carbon fiber resin film, and then heating and rolling;
the carbon fiber cloth is formed by sequentially laminating, hot-pressing and bonding a first layer of carbon fiber resin film, a glass fiber unidirectional cloth, a second layer of carbon fiber resin film, a polyacrylonitrile-based carbon fiber cloth and a third layer of carbon fiber resin film.
As a further scheme of the invention: and step two, the extrusion die head comprises an outer die and an inner die, the inner die is installed on the inner side of the outer die, a plurality of inner convex blocks are uniformly arranged on the inner side of the outer die, four reinforcing rib grooves are uniformly formed in the outer side of the inner die, and the reinforcing rib grooves are semicircular.
As a further scheme of the invention: step four the rubber coating device includes the support rack, settles roller, glue spreader, gluey water tank, glues pump, servo motor, shifting slide and laser cutting head, support rack one side is installed in proper order and is settled roller, glue spreader and shifting slide, settle the roller outside and install the carbon cloth of lapping, and the carbon cloth passes the bottom of glue spreader and shifting slide respectively, servo motor is installed to the support rack opposite side, the transmission is connected through gear engagement to servo motor output and glue spreader one end, glue spreader one end center department is connected with gluey pump through swivelling joint head, it installs gluey water tank to glue the pump top, shifting slide bottom cover is equipped with the laser cutting head.
As a further scheme of the invention: the glue spreader is of a hollow structure, a plurality of tiny glue discharging holes are formed in the surface of the outer side of the glue spreader, and a plurality of glue coating bristles are pasted on the surface of the outer side of the glue spreader.
Compared with the prior art, the invention has the beneficial effects that:
1. the four semicircular reinforcing rib grooves are uniformly formed in the outer side of the inner die of the extrusion die head, so that reinforcing ribs can be arranged on the inner sides of the PVC layers formed by the inner die of the extrusion die head in the PVC pipe extrusion production process, the internal supporting strength of the PVC pipe is greatly improved, and the PVC pipe is convenient to use in actual life;
2. softening an epoxy resin raw material, adding graphene, stirring uniformly, and putting the mixture into a coating machine to prepare a carbon fiber resin film; the glass fiber unidirectional cloth is clamped between two layers of carbon fiber resin films, after heating and rolling, a layer of polyacrylonitrile-based carbon fiber cloth is covered, a layer of carbon fiber resin film is covered, then the carbon fiber cloth formed by heating and rolling is pasted to the outer side of a PVC layer through a two-component modified epoxy resin adhesive to form a carbon fiber cloth layer, the carbon fiber cloth layer is high in strength, small in density and thin in thickness, the self weight and the cross section size of a reinforcing component are not basically increased, the reinforcing component is suitable for various structural types, the external supporting strength of a PVC pipe is greatly enhanced, meanwhile, when the PVC layer is produced through a plurality of inner convex blocks uniformly arranged on the inner side of an outer die, reinforcing connecting grooves are formed in the outer side of the PVC layer, a pasting layer is formed through the matching of the reinforcing connecting grooves and the two-component modified epoxy;
3. when the double-component modified epoxy resin adhesive is coated on the outer side of the PVC layer, one end of the carbon fiber cloth passes through the bottom of the glue spreader and the movable slide rail respectively, when the carbon fiber cloth passes through the bottom of the glue spreader, a glue pump starts to work to pressurize and convey the double-component modified epoxy resin adhesive in a glue tank into a hollow structure of the glue spreader, under the condition of pressurization, the double-component modified epoxy resin adhesive is discharged from a glue discharge hole, the glue is adsorbed on the outer surface of the glue spreader through glue coating bristles, when the carbon fiber cloth passes through the bottom of the glue spreader, a servo motor drives the glue spreader to rotate at a constant speed, the double-component modified epoxy resin adhesive is uniformly coated on the top side of the carbon fiber cloth to complete gluing while the carbon fiber cloth is uniformly conveyed, and then when the carbon fiber cloth passes through the bottom of the movable slide rail, the carbon fiber cloth is uniformly, the adhesive can be quickly and uniformly coated on the top side of the carbon fiber cloth layer, and meanwhile, the carbon fiber cloth layer is quickly cut, so that the whole PVC pipe is conveniently produced, and the production efficiency of the whole PVC pipe is greatly improved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a PVC pipe according to the present invention;
FIG. 2 is a schematic view of the structure of the PVC layer of the present invention;
FIG. 3 is a cross-sectional view of an extrusion die of the present invention;
FIG. 4 is a schematic view of a structure of one side of the glue spreading device of the present invention;
FIG. 5 is another schematic view of the gluing device according to the present invention.
In the figure: 1. a PVC layer; 2. a bonding layer; 3. a carbon fiber cloth layer; 4. reinforcing the connecting groove; 5. reinforcing ribs; 6. an outer mold; 7. an inner bump; 8. a reinforcing rib groove; 9. an inner mold; 10. a support stand; 11. arranging a roller; 12. glue spreading roller; 13. a glue tank; 14. a glue pump; 15. a servo motor; 16. moving the slide rail; 17. laser cutting head.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
Referring to fig. 1-5, a high-strength PVC pipe comprises a PVC layer 1, an adhesive layer 2 and a carbon fiber cloth layer 3, wherein the carbon fiber cloth layer 3 is wrapped outside the PVC layer 1 through the adhesive layer 2, the outer surface of the PVC layer 1 is provided with a plurality of reinforcing connecting grooves 4, and the inner side of the PVC layer 1 is horizontally provided with four reinforcing ribs 5;
the PVC layer 1 comprises the following raw material components in parts by weight: 30-35 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of ethylene propylene rubber, 5-8 parts of acetylene-propylene copolymer, 2-4 parts of stabilizer, 8-12 parts of filler and 1-3 parts of beta-cyclodextrin.
The sticking layer 2 is a double-component modified epoxy resin adhesive.
A processing technology of a high-strength PVC pipe comprises the following specific steps:
the method comprises the following steps: mixing the following raw materials: adding PVC resin, chlorinated polyethylene, ethylene propylene rubber, acetylene-propylene copolymer, a stabilizer, a filler and beta-cyclodextrin into a hot mixer, fully stirring until the temperature rises to 125 ℃, stirring for 10 minutes, cooling by a low-speed mixer, stirring at 45 ℃ at low speed, bagging for later use, stirring for 8 minutes, starting the hot mixer after adding PVC resin particles in order to ensure that the raw materials are fully contacted with the PVC resin particles and reduce the mutual adsorption effect, and then sequentially adding other raw materials;
step two: the stirred material was carried into the extruder, the extruder screw being divided into 3 zones: add the material feeding section (material feeding section), melt section (compression section), measurement section (homogenization section), these three corresponding 3 functional areas of having constituteed the material: the PVC material extruding machine is used for extruding a PVC layer 1 under the coordination of an extruding die head, wherein the extruding die head is divided into an outer die 6 and an inner die 9, the gap between the outer die 6 and the inner die 9 is the thickness of the extruded PVC layer 1, a plurality of inner lugs 7 uniformly arranged on the inner side of the outer die 6 form reinforcing connecting grooves 4 on the outer side of the PVC layer 1, four semicircular reinforcing rib grooves 8 uniformly arranged on the outer side of the inner die 9 form reinforcing ribs 5 on the inner side of the PVC layer 1, the temperature of a charging barrel of the solid conveying area is controlled to be 100-140 ℃, so that the solid conveying area is shortened, the lengths of the plasticizing area and the melt conveying area are increased, good plasticization is ensured, and good product quality is ensured; the temperature of a material plasticizing area is controlled to be 170-190 ℃, the vacuum degree of the charging barrel is 0.08-0.09 MPa, the normal vacuum degree is ensured, the good exhaust effect is further ensured, and bubbles are prevented from being stored in the pipe; the temperature of the melt conveying area is 160-180 ℃, the rotating speed of the screw is generally 20-30 r/min, and the improvement of the rotating speed of the screw, the reduction of the resistance of the machine head and the improvement of the pressure in the plasticizing area are all beneficial to the improvement of the conveying speed;
step three: starting the vacuum pump and drawing the vacuum groove into vacuum, adsorbing PVC layer 1 on the inner wall of sizing barrel sleeve, adjusting the vacuum according to the external diameter of PVC layer 1 and completing the sizing, separating PVC layer 1 after the sizing from the sizing copper sleeve under the effect of the tractor and entering the cooling water tank, drawing the vacuum forming machine and the cooling water tank after spray cooling or soaking cooling, wherein the process conditions of vacuum forming are as follows: the vacuum degree is 20.0-53.3kPa, the water temperature is 15-25 ℃, the water in the vacuum groove is in a mist shape, meanwhile, a certain traction force and a traction speed are provided for the pipe extruded by the extrusion die head through the traction device, the pipe is uniformly led out, and the wall thickness of the pipe is adjusted by adjusting the traction speed. The traction speed depends on the extrusion speed, and generally the traction speed is 1 to 3 percent faster than the extrusion speed;
step four: spraying a layer of two-component modified epoxy resin adhesive on a formed PVC layer 1 through a gluing device, wrapping carbon fiber cloth on the surface of the PVC layer 1 to form a carbon fiber cloth layer 3, placing rolled carbon fiber cloth on a placement roller 11, enabling one end of the carbon fiber cloth to pass through the bottom of a glue spreading roller 12 and the bottom of a movable slide rail 16 respectively, enabling a glue pump 14 to work when the carbon fiber cloth passes through the bottom of the glue spreading roller 12, pressurizing and conveying the two-component modified epoxy resin adhesive in a glue tank 13 into a hollow structure of the glue spreading roller 12, discharging the two-component modified epoxy resin adhesive from a glue discharge hole under the pressurizing condition, adsorbing the glue on the outer surface of the glue spreading roller 12 through gluing hairs, driving the glue spreading roller 12 to rotate at a constant speed by a servo motor 15 when the carbon fiber cloth passes through the bottom of the glue spreading roller 12, uniformly conveying the carbon fiber cloth, and uniformly spreading the two-component modified epoxy resin adhesive on the top, then when the carbon fiber cloth passes through the bottom of the movable sliding rail 16, the carbon fiber cloth is uniformly cut into required length by the laser cutting head 17 which moves back and forth on the movable sliding rail 16, and then the cut carbon fiber cloth is pasted on the outer side of the PVC layer 1 and then dried by the double-component modified epoxy resin adhesive to complete production.
Step four, the carbon fiber cloth comprises the following raw materials in parts by mass: 10-25 parts of polyacrylonitrile-based carbon fiber cloth, 60-80 parts of glass fiber unidirectional cloth, 5-20 parts of graphene powder and 15-30 parts of epoxy resin;
the carbon fiber cloth is prepared by the following process: preparing a carbon fiber resin film, softening an epoxy resin raw material, adding graphene, uniformly stirring, and putting into a coating machine to prepare the carbon fiber resin film; the glass fiber unidirectional cloth is clamped between two layers of carbon fiber resin films, and is formed by covering a layer of polyacrylonitrile-based carbon fiber cloth after heating and rolling, then covering a layer of carbon fiber resin film, and then heating and rolling;
the carbon fiber cloth is formed by sequentially laminating, hot-pressing and bonding a first layer of carbon fiber resin film, a glass fiber unidirectional cloth, a second layer of carbon fiber resin film, a polyacrylonitrile-based carbon fiber cloth and a third layer of carbon fiber resin film.
And the second extrusion die head comprises an outer die 6 and an inner die 9, the inner die 9 is installed on the inner side of the outer die 6, a plurality of inner convex blocks 7 are uniformly arranged on the inner side of the outer die 6, four reinforcing rib grooves 8 are uniformly formed in the outer side of the inner die 9, and the reinforcing rib grooves 8 are semicircular.
The four-step gluing device comprises a support rack 10, a placement roller 11, a glue spreader 12, a glue tank 13, a glue pump 14, a servo motor 15, a movable slide rail 16 and a laser cutting head 17, wherein the placement roller 11, the glue spreader 12 and the movable slide rail 16 are sequentially installed on one side of the support rack 10, coiled carbon fiber cloth is installed on the outer side of the placement roller 11 and is convenient to place, the carbon fiber cloth respectively penetrates through the bottoms of the glue spreader 12 and the movable slide rail 16, the servo motor 15 is installed on the other side of the support rack 10 and provides output power to drive the glue spreader 12 to rotate, the output end of the servo motor 15 and one end of the glue spreader 12 are connected and driven through gear meshing, the center of one end of the glue spreader 12 is connected with the glue pump 14 through a rotary connector, and when the glue spreader 12 is used, two-component modified epoxy resin glue can enter the interior of the glue spreader 12 through the rotary, glue water tank 13 is installed at glue pump 14 top for the storage two ingredient modified epoxy adhesive, and the cover is equipped with laser cutting head 17 bottom the movable slide rail 16, and laser cutting head 17 moves on movable slide rail 16 and carries out the fly-cutting to carbon cloth.
The glue spreader 12 is of a hollow structure, a certain amount of double-component modified epoxy resin adhesive is convenient to store, a plurality of small glue discharging holes are formed in the outer side surface of the glue spreader, the double-component modified epoxy resin adhesive can be uniformly conveyed to the outer surface of the glue spreader 12 under the pressurized condition, a plurality of glue coating bristles are arranged on the outer side surface of the glue spreader 12 in a sticking mode, the double-component modified epoxy resin adhesive on the outer surface is adhered through the glue coating bristles, then the glue coating bristles are uniformly coated on the top side surface of the carbon fiber cloth, and the coating uniformity is guaranteed.
The working principle of the gluing device is as follows: one end of carbon fiber cloth passes through the bottoms of the glue spreader 12 and the movable slide rail 16 respectively, when the carbon fiber cloth passes through the bottom of the glue spreader 12, the glue pump 14 starts to work to pressurize and convey the two-component modified epoxy resin adhesive in the glue tank 13 into a hollow structure of the glue spreader 12, under the pressurized condition, the two-component modified epoxy resin adhesive is discharged from a glue discharge hole, the glue is adsorbed on the outer surface of the glue spreader 12 through gluing bristles, when the carbon fiber cloth passes through the bottom of the glue spreader 12, the output end of the servo motor 15 drives the glue spreader 12 to rotate at a constant speed through gear transmission, the two-component modified epoxy resin adhesive is uniformly spread on the top side of the carbon fiber cloth to complete gluing while the carbon fiber cloth is uniformly conveyed, then when the carbon fiber cloth passes through the bottom of the movable slide rail 16, the carbon fiber cloth is uniformly cut into required length through the laser cutting head 17, the adhesive can be quickly and uniformly coated on the top side of the carbon fiber cloth layer 3, and the carbon fiber cloth layer 3 is quickly cut.
Compared with the prior art, the invention has the beneficial effects that:
1. the four semicircular reinforcing rib grooves 8 are uniformly formed in the outer side of the inner die 9 of the extrusion die head, so that the reinforcing ribs 5 can be arranged on the inner sides of the PVC layers 1 which are ensured to be formed by the inner die 9 of the extrusion die head in the PVC pipe extrusion production process, the internal supporting strength of the PVC pipe is greatly improved, and the PVC pipe is convenient to use in actual life;
2. softening an epoxy resin raw material, adding graphene, stirring uniformly, and putting the mixture into a coating machine to prepare a carbon fiber resin film; sandwiching glass fiber unidirectional cloth between two layers of carbon fiber resin films, heating and rolling, covering with a layer of polyacrylonitrile-based carbon fiber cloth, covering with a layer of carbon fiber resin film, then the carbon fiber cloth formed by heating and rolling is pasted on the outer side of the PVC layer 1 through a double-component modified epoxy resin adhesive to form a carbon fiber cloth layer 3, the carbon fiber cloth layer 3 has high strength, small density and thin thickness, the self weight and the section size of the reinforcing member are not basically increased, the carbon fiber cloth layer is suitable for various structural types, the external support strength of the PVC pipe is greatly enhanced, meanwhile, when the PVC layer 1 is produced by the plurality of inner convex blocks 7 uniformly arranged on the inner side of the outer die 5, the outer side of the PVC layer 1 is provided with a reinforcing connecting groove 4, the bonding layer 2 is formed by matching the reinforcing connecting groove 4 and the double-component modified epoxy resin adhesive, the bonding firmness is enhanced, and the tight connection of the PVC layer 1 and the carbon fiber cloth layer 3 is ensured;
3. when the double-component modified epoxy resin adhesive is coated on the outer side of the PVC layer 1, one end of carbon fiber cloth passes through the bottoms of a glue spreader 12 and a movable slide rail 16 respectively, a glue pump 14 starts to work to pressurize and convey the double-component modified epoxy resin adhesive in a glue tank 13 into a hollow structure of the glue spreader 12 when the carbon fiber cloth passes through the bottom of the glue spreader 12, the double-component modified epoxy resin adhesive is discharged from a glue discharge hole under the condition of pressurization, the glue is adsorbed on the outer surface of the glue spreader 12 through glue coating bristles, when the carbon fiber cloth passes through the bottom of the glue spreader 12, a servo motor 15 drives the glue spreader 12 to rotate at a constant speed, the double-component modified epoxy resin adhesive is uniformly coated on the top side of the carbon fiber cloth to complete glue coating while the carbon fiber cloth is uniformly conveyed, then when the carbon fiber cloth passes through the bottom of the movable slide rail 16, the carbon fiber cloth is uniformly cut into required length through, the adhesive can be quickly and uniformly coated on the top side of the carbon fiber cloth layer 3, and the carbon fiber cloth layer 3 is quickly cut, so that the whole PVC pipe can be conveniently produced, and the production efficiency of the whole PVC pipe is greatly improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A high-strength PVC pipe is characterized by comprising a PVC layer (1), a pasting layer (2) and a carbon fiber cloth layer (3), wherein the carbon fiber cloth layer (3) is wrapped outside the PVC layer (1) through the pasting layer (2), the outer side surface of the PVC layer (1) is provided with a plurality of reinforcing connecting grooves (4), and the inner side of the PVC layer (1) is horizontally provided with four reinforcing ribs (5);
the PVC layer (1) comprises the following raw material components in parts by weight: 30-35 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of ethylene propylene rubber, 5-8 parts of acetylene-propylene copolymer, 2-4 parts of stabilizer, 8-12 parts of filler and 1-3 parts of beta-cyclodextrin;
the processing technology of the high-strength PVC pipe comprises the following specific steps:
the method comprises the following steps: mixing the following raw materials: adding PVC resin, chlorinated polyethylene, ethylene propylene rubber, acetylene-propylene copolymer, a stabilizer, a filler and beta-cyclodextrin into a hot mixer, fully stirring until the temperature rises to 125 ℃, stirring for 10 minutes, cooling by a low-speed mixer, stirring at a low speed, bagging for later use, and stirring for 8 minutes at a stirring temperature of 45 ℃;
step two: the stirred raw materials are brought into an extruding machine, the extruding machine extrudes a PVC layer (1) under the coordination of an extruding die head, wherein the extruding die head is divided into an outer die (6) and an inner die (9), the gap between the outer die (6) and the inner die (9) is the thickness of the extruded PVC layer (1), a plurality of inner lugs (7) uniformly arranged on the inner side of the outer die (6) form reinforcing connecting grooves (4) on the outer side of the PVC layer (1), four semicircular reinforcing rib grooves (8) uniformly arranged on the outer side of the inner die (9) form reinforcing ribs (5) on the inner side of the PVC layer (1), and the temperature of a charging barrel of a solid conveying area is controlled to be 100-140 ℃; the temperature of the material plasticizing area is controlled between 170 and 190 ℃, and the vacuum degree of the charging barrel is between 0.08 and 0.09 MPa; the temperature of the melt conveying area is 160-180 ℃, and the rotating speed of the screw is 20-30 r/min;
step three: the vacuum groove is vacuumized by starting a vacuum pump, the PVC layer (1) is adsorbed on the inner wall of the sizing sleeve, the sizing is completed by adjusting the vacuum degree according to the outer diameter of the PVC layer (1), the PVC layer (1) after sizing is separated from the sizing sleeve into a cooling water tank under the action of a tractor, the cooling water tank is drawn out after spray cooling or soaking cooling, and the process conditions of vacuum sizing are as follows: the vacuum degree is 20.0-53.3kPa, the water temperature is 15-25 ℃, and the water in the vacuum groove is atomized;
step four: spraying a layer of double-component modified epoxy resin adhesive on a formed PVC layer (1) through a gluing device, wrapping carbon fiber cloth on the surface of the PVC layer (1) to form a carbon fiber cloth layer (3), placing rolled carbon fiber cloth on a placement roller (11), enabling one end of the carbon fiber cloth to pass through the bottoms of a glue spreader (12) and a movable slide rail (16) respectively, when the carbon fiber cloth passes through the bottom of the glue spreader (12), starting a glue pump (14) to work to pressurize and convey the double-component modified epoxy resin adhesive in a glue tank (13) into a hollow structure of the glue spreader (12), under the condition of pressurization, discharging the double-component modified epoxy resin adhesive from a glue discharge hole, adsorbing the glue on the outer surface of the glue spreader (12) through glue coating bristles, when the carbon fiber cloth passes through the bottom of the glue spreader (12), driving the glue spreader (12) to rotate at a constant speed by a servo motor (15), and uniformly conveying the carbon fiber cloth, the double-component modified epoxy resin adhesive is uniformly coated on the top side of the carbon fiber cloth to complete gluing, then when the double-component modified epoxy resin adhesive passes through the bottom of a movable sliding rail (16), the carbon fiber cloth is uniformly cut into required length by a laser cutting head (17) which moves back and forth on the movable sliding rail (16), and then the cut carbon fiber cloth is adhered to the outer side of a PVC layer (1) and then dried to complete production.
2. The high-strength PVC pipe material according to claim 1, wherein the adhesive layer (2) is a two-component modified epoxy resin adhesive.
3. The high-strength PVC pipe material according to claim 1, wherein the carbon fiber cloth in the fourth step comprises the following raw materials in parts by mass: 10-25 parts of polyacrylonitrile-based carbon fiber cloth, 60-80 parts of glass fiber unidirectional cloth, 5-20 parts of graphene powder and 15-30 parts of epoxy resin;
the carbon fiber cloth is prepared by the following process: softening an epoxy resin raw material, adding graphene, stirring uniformly, and putting the mixture into a coating machine to prepare a carbon fiber resin film; the glass fiber unidirectional cloth is sandwiched between two layers of carbon fiber resin films, and is formed by covering a layer of polyacrylonitrile-based carbon fiber cloth after heating and rolling, then covering a layer of carbon fiber resin film, and then heating and rolling.
4. The high-strength PVC pipe according to claim 1, wherein the gluing device comprises a support stand (10), a placement roller (11), a glue spreader (12), a glue tank (13), a glue pump (14), a servo motor (15), a movable slide rail (16) and a laser cutting head (17), the placement roller (11), the glue spreader (12) and the movable slide rail (16) are sequentially installed on one side of the support stand (10), coiled carbon fiber cloth is installed on the outer side of the placement roller (11), the carbon fiber cloth respectively penetrates through the bottoms of the glue spreader (12) and the movable slide rail (16), the servo motor (15) is installed on the other side of the support stand (10), the output end of the servo motor (15) and one end of the glue spreader (12) are connected through gear engagement for transmission, the center of one end of the glue spreader (12) is connected with the glue pump (14) through a rotary connector, glue water tank (13) is installed at gluey pump (14) top, removal slide rail (16) bottom cover is equipped with laser cutting head (17).
5. The high-strength PVC pipe as recited in claim 1, wherein the glue spreader (12) is hollow, and the outer surface of the glue spreader (12) is provided with a plurality of fine glue discharging holes, and the outer surface of the glue spreader (12) is adhered with a plurality of glue coating bristles.
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| CN111136840B (en) * | 2019-12-04 | 2021-12-21 | 厦门创颖工艺品有限公司 | Method for manufacturing handicraft production mold |
| CN111022820A (en) * | 2019-12-19 | 2020-04-17 | 江苏众信绿色管业科技有限公司 | Lining pipe for stainless steel pipeline repair and repair process |
| CN112170093A (en) * | 2020-10-13 | 2021-01-05 | 安庆柯麦机电科技有限公司 | Base material pretreatment system of 5G cabinet |
| CN114770991B (en) * | 2022-03-30 | 2023-01-24 | 江苏致乐管业科技有限公司 | Processing method of PVC (polyvinyl chloride) pipe |
| CN116836489A (en) * | 2023-07-08 | 2023-10-03 | 东莞宝特电业股份有限公司 | A high elasticity PVC cable for robot |
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| JPH06340004A (en) * | 1993-06-01 | 1994-12-13 | Sekisui Chem Co Ltd | Production of fiber-reinforced complex tube |
| CN2867037Y (en) * | 2006-01-19 | 2007-02-07 | 山东首尔设备制造有限公司 | Whole braided bonded composite pipe |
| CN102537538A (en) * | 2011-12-15 | 2012-07-04 | 福安市东风橡胶制品有限公司 | Fluorine rubber-coated hose having carbon fiber as reinforcement layer and manufacture process thereof |
| CN104045942B (en) * | 2014-07-04 | 2016-09-28 | 芜湖中源赛特管业有限公司 | PVC and preparation method thereof |
| CN104896211B (en) * | 2015-04-28 | 2017-06-20 | 南京林业大学 | High-performance wood base composite pressure delivery pipe and preparation method |
| CN205350606U (en) * | 2016-02-17 | 2016-06-29 | 新疆普润节水科技开发有限公司 | Feedwater is with high impact modification PVC -M tubular product |
| CN107501783A (en) * | 2017-08-04 | 2017-12-22 | 安徽博泰塑业科技有限公司 | A kind of pvc pipe extruding-out process of effectively lifting impact strength |
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