CN111483126A - Preparation process of reinforced plastic pipeline material - Google Patents

Preparation process of reinforced plastic pipeline material Download PDF

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Publication number
CN111483126A
CN111483126A CN202010352162.7A CN202010352162A CN111483126A CN 111483126 A CN111483126 A CN 111483126A CN 202010352162 A CN202010352162 A CN 202010352162A CN 111483126 A CN111483126 A CN 111483126A
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China
Prior art keywords
extrusion
parts
cavity
reinforced
shell
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CN202010352162.7A
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Chinese (zh)
Inventor
张玉勇
姜俊杰
张哲�
姜浩
刘磊
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Anhui Chaoxing New Material Technology Co ltd
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Anhui Chaoxing New Material Technology Co ltd
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Priority to CN202010352162.7A priority Critical patent/CN111483126A/en
Publication of CN111483126A publication Critical patent/CN111483126A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/144—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration at the plasticising zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/3001—Extrusion nozzles or dies characterised by the material or their manufacturing process
    • B29C48/3003—Materials, coating or lining therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B29C48/3366—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a die with concentric parts, e.g. rings, cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/503—Extruder machines or parts thereof characterised by the material or by their manufacturing process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/69—Filters or screens for the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • 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
    • 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
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/04—Thermoplastic elastomer

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a preparation process of an enhanced plastic pipeline material, which comprises three procedures of glass fiber pretreatment, raw material mixing and melt co-extrusion; wherein, the glass fiber pretreatment is obtained by immersing chopped fibers into a treatment solution formed by a coupling agent of vinyl triacetoxy silane and an ethanol solution, and stirring and drying; the reinforced outer layer and the reinforced inner layer are both prepared by taking polypropylene as a matrix, adding auxiliary agents with different functions and uniformly stirring, wherein the reinforced additive is prepared by taking high-strength polyester filaments as a framework fabric, coating a thermoplastic polyurethane elastomer after infrared heating and shaping, calendering, cutting and crushing, is compatible with polypropylene during melt extrusion, further forms a network structure with a polypropylene molecular chain and improves the strength of the pipe. The reinforced plastic pipeline material disclosed by the invention has the advantages that the longitudinal retraction rate reaches 1.5-1.8%, the tube heating oven test conforms to the GB/T8803 specification, the tube is free from cracking in the falling test, and the strength and the impact resistance are good.

Description

Preparation process of reinforced plastic pipeline material
Technical Field
The invention relates to the technical field of pipeline materials, in particular to a preparation process of an enhanced plastic pipeline material.
Background
The plastic pipe is used as an important component of chemical building materials and is widely applied to the fields of building water supply and drainage, town water supply and drainage, gas pipes and the like. The existing plastic pipes mainly comprise a UPVC drain pipe, a UPVC water supply pipe, an aluminum-plastic composite pipe, a polyethylene water supply pipe and a polypropylene PPR hot water pipe, the strength of the materials used by the existing plastic pipes is not high, the thickness required by the pipe wall is large after the existing plastic pipes are manufactured into the pipes, the existing plastic pipes cannot have enough strength and long service life, and the ageing resistance and the corrosion resistance can be further improved.
The prior art (CN109988374A) discloses a preparation method of a high-strength plastic pipeline material, which comprises the steps of putting weighed PVC, resin, nano-silica, lime, polyvinyl alcohol and vinyl resin into a high-speed mixer, stirring and drying at 30-40 ℃ to obtain a first dried substance; putting the weighed carbon fibers, glass fibers, silicon carbide, silicon dioxide, magnesium carbonate, Suzhou soil, a heat-resistant modifier and stainless steel fiber yarns into a high-speed mixer, and stirring and drying at the temperature of 20-45 ℃ to obtain a second dried substance; extruding and granulating the first drying material and the second drying material by a double-screw extruder to obtain a base material; and crushing the base material into particles to obtain the high-strength plastic pipeline material. The pipeline manufactured by the method has excellent performance, and has higher strength, aging resistance, corrosion resistance and better abrasion resistance compared with the existing plastic pipeline. The following technical problems are found to exist: 1) the strength of the pipe cannot be improved by forming a network structure with a polypropylene molecular chain, so that the impact resistance of the pipe is poor; 2) the shearing, crushing, extruding, secondary extruding, die orifice extrusion molding and cooling of the raw materials of the pipe cannot be realized through a matched plastic pipe extruder, so that the quality of the pipe is unstable, and the raw material cost and the processing cost are increased.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a preparation process of a reinforced plastic pipeline material.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a preparation process of an enhanced plastic pipeline material, which comprises the following steps:
s1, glass fiber pretreatment: according to the weight parts, 10-15 parts of absolute ethyl alcohol and 160 parts of 120-type water are uniformly mixed to obtain an ethanol solution, 1.5-4 parts of vinyl triacetoxysilane is dissolved in the ethanol solution to obtain a treatment solution, 20-40 parts of chopped glass fiber is immersed in the treatment solution, stirred at 70-80 ℃ for 1-2h, and dried at 100-type water and 120 ℃ to obtain pretreated glass fiber;
s2, mixing the raw materials: according to the weight parts, 85-120 parts of polypropylene, 5-10 parts of reinforcing additive, 3-8 parts of silicon dioxide, 2-6 parts of diatomite and 0.6-1.5 parts of antioxidant are uniformly mixed to prepare a reinforcing outer layer mixture; uniformly stirring 125 parts of 110-one polypropylene, 6-15 parts of reinforcing additive, 2-4 parts of lubricant, 0.5-1 part of antioxidant and 0.5-2 parts of benzoyl peroxide to prepare a reinforcing inner layer mixture;
s3, melt co-extrusion: starting a first motor and a vacuum pump of the plastic pipe extruder, wherein a motor shaft of the first motor drives a driving belt pulley to rotate, a transmission belt and a driven belt pulley rotate along with the driving belt and the driven belt pulley, the driven belt pulley drives an extrusion screw to rotate, and the vacuum pump is used for vacuumizing an inner cavity of an extrusion shell through a vacuum pipe;
adding a reinforced inner layer mixture from a first feeding box, continuously shearing and crushing the reinforced inner layer mixture by a first crushing cutter and a second crushing cutter after the reinforced inner layer mixture enters a feeding cavity, filtering the mixture by a first filter plate and a second filter plate, allowing the filtered mixture to fall into an inner cavity of an extrusion shell, heating the filtered mixture and extruding the filtered mixture by an extrusion screw to form a reinforced inner layer, and moving the reinforced inner layer towards an extrusion die orifice;
in the extrusion process of the extrusion screw, part of the reinforced inner layer mixture flows into the secondary extrusion cavity through the filter screen, the second motor is started, and the secondary extrusion screw is driven by the second motor to extrude the reinforced inner layer mixture to the periphery of the extrusion screw through the filter screen;
adding a reinforced outer layer mixture from a second feeding box, adding 25-45 parts of pretreated glass fiber and 0.5-2 parts of benzoyl peroxide according to parts by weight after the reinforced outer layer mixture enters a feeding cavity, filtering by a first crushing knife and a second crushing knife, allowing the filtered glass fiber and the filtered benzoyl peroxide to fall into the cavity of the die through the feeding cavity, extruding the filtered glass fiber and the filtered benzoyl peroxide to the periphery of the inner layer of the pipe along with the rotation of an extrusion screw rod, enabling a flow channel layer to facilitate the flowing of raw materials of the outer layer of the pipe, and extruding at the temperature of 190 ℃ and 210 ℃ to form a reinforced outer layer; and circulating cooling water is introduced from the water circulation port, the cooling water is sprayed out from the spray hole after passing through the water storage area and the spray column, and the reinforced plastic pipeline material is obtained after cooling.
As a further aspect of the present invention, the preparation method of the enhancing additive is as follows:
1) fabric sizing: shaping the skeleton fabric by using an infrared heating oven, wherein the processing temperature is 160-175 ℃;
2) coating: coating a thermoplastic polyurethane elastomer with the thickness of 0.1-0.2mm on the shaping framework fabric, and plasticizing by infrared heating at 210-220 ℃;
3) rolling, cutting and crushing: and (3) calendering the thermoplastic polyurethane elastomer to the surface of the coated and shaped skeleton fabric at the temperature of 190-210 ℃, cutting and crushing to obtain the reinforcing additive with the particle size of 10-20 meshes.
As a further scheme of the invention, the specification of the skeleton fabric is that the density of warp and weft is 32 × 10 pieces/inch, 1000D/5 high-strength high-shrinkage polyester filaments are adopted in the warp direction and twisted for 60-80 turns/meter, the yarns S, Z are twisted and arranged at intervals, 1000D/5 high-strength medium-shrinkage polyester filaments are adopted in the weft direction and twisted for 60-80 turns/meter, and the tensile strength of the thermoplastic polyurethane elastomer is 40N/mm2The tear strength was 41N/mm and the elongation at break was 600%.
As a further scheme of the invention, the polypropylene is low-fluidity polypropylene, the melt flow rate under the conditions of 230 ℃ and 2.16kg of load is 1.0-4.0g/10min, the length of the chopped glass fiber is 0.2-0.3mm, and the fiber dispersibility is 100%.
In a further embodiment of the present invention, the antioxidant is one or more of 2, 6-di-tert-butyl-p-cresol, tert-butyl-p-hydroxyanisole and tert-butyl-p-hydroxyanisole, and the lubricant is one or more of magnesium stearate, erucamide, glycerol tristearate and n-butyl stearate.
As a further scheme of the invention, the plastic pipe extruder comprises a base, a belt box, a transmission mechanism and an extrusion mechanism, wherein the belt box, the transmission mechanism and the extrusion mechanism are arranged on the base;
the transmission mechanism comprises a first motor, a driving belt pulley, a driven belt pulley and a transmission belt, wherein the first motor is fixed on the base, the driving belt pulley, the driven belt pulley and the transmission belt are arranged in the belt box, a motor shaft of the first motor is fixedly connected with the axis of the driving belt pulley, and the transmission belt is arranged around the periphery of the driving belt pulley and the driven belt pulley; the extruding mechanism comprises an extruding shell, an extruding screw rod, an extruding die orifice and a cooling box, wherein the extruding shell is cuboid and is arranged on one side of the belt box, the extruding screw rod is horizontally arranged in an inner cavity of the extruding shell, one end of the extruding screw rod is fixedly connected with the axis of the driven belt pulley, and the other end of the extruding screw rod extends into the extruding die orifice; a first feeding box is arranged at the top of the extrusion shell close to the belt box, and a second feeding box is arranged at the top of the extrusion die opening; the bottom of the extrusion shell, which is close to the belt box, is connected with a vacuum pump through a vacuum tube; a secondary extrusion cavity is formed in the bottom of the extrusion shell, which is close to the extrusion die orifice, a filter screen communicated with the inner cavity of the extrusion shell is arranged at the top of the secondary extrusion cavity, a secondary extrusion screw communicated with the filter screen is arranged in the secondary extrusion cavity, and one end of the secondary extrusion screw is connected with a motor shaft of a second motor; the diameter of the mesh of the filter screen is 0.6-1.2 cm;
the extrusion die comprises a die opening shell and a die opening, a feeding cavity communicated with the feeding cavity is obliquely arranged on the periphery of the die opening close to the extrusion shell side, and a plurality of runner cavities are equidistantly arranged on the periphery of the die opening far away from the extrusion shell side.
As a further scheme of the invention, the first feeding box and the second feeding box have the same structure and comprise feeding cavities, wherein one side of each feeding cavity is provided with a vertical anti-seismic mounting plate, the top and the bottom of each anti-seismic mounting plate are respectively provided with a buffer spring, the anti-seismic mounting plates are connected with a plurality of first filter plates facing the feeding cavities, the end parts of the first filter plates are connected with first crushing cutters, the other side of each feeding cavity is provided with second filter plates staggered with the first filter plates, and the end parts of the second filter plates are connected with second crushing cutters; the bottom of the anti-seismic mounting plate is provided with a negative pressure fan; wherein, the diameter of the filter holes of the first filter plate and the second filter plate is 0.2-0.4 mm.
As a further scheme of the invention, the cooling box comprises a cooling shell and a water circulation port, wherein the water circulation port is arranged on the periphery of the cooling shell, a water storage area is arranged in an inner cavity of the cooling shell, a plurality of jet flow columns facing to a cavity of the cooling shell are arranged on the inner side of the water storage area, and jet holes are formed in the jet flow columns.
The invention has the beneficial effects that:
1. the preparation process of the reinforced plastic pipeline material comprises three procedures of glass fiber pretreatment, raw material mixing and melt co-extrusion; wherein, the glass fiber pretreatment is obtained by immersing chopped fibers into a treatment solution formed by a coupling agent of vinyl triacetoxy silane and an ethanol solution, and stirring and drying; the reinforced outer layer and the reinforced inner layer are both prepared by taking polypropylene as a matrix, adding auxiliary agents with different functions and uniformly stirring, wherein the reinforced additive is prepared by taking high-strength polyester filaments as a framework fabric, coating a thermoplastic polyurethane elastomer after infrared heating and shaping, calendering, cutting and crushing, is compatible with polypropylene during melt extrusion, further forms a network structure with a polypropylene molecular chain and improves the strength of the pipe. Through performance tests, the reinforced plastic pipeline material disclosed by the invention has the advantages that the longitudinal retraction rate reaches 1.5-1.8%, no bubbles or cracks exist, a pipe heating oven test meets the GB/T8803 specification, the pipe is not cracked in a falling test, a falling hammer impact test reaches 6.8-7.5%, the ring stiffness is 4.8-5.2%, the physical and mechanical properties are excellent, and the strength and the impact resistance are good.
2. During glass fiber pretreatment, a large amount of hydroxyl groups are arranged on the surface of the chopped glass fiber and can act with a vinyl silane coupling agent, the compatibility of the glass fiber and a polypropylene matrix is improved, the dispersion uniformity of the glass fiber is improved, the strength of a pipe is improved, vinyl silane is grafted to a polypropylene molecular chain under the action of a small amount of initiator benzoyl peroxide in the melting extrusion process, the interface bonding strength of the glass fiber and the polypropylene matrix is further improved, meanwhile, vinyl silane plays a role of a cross-linking point, the polypropylene molecular chain forms a network structure, and the glass fiber compensates for the strength reduced by the fracture of a small part of the polypropylene molecular chain.
3. In the melting co-extrusion process, a first motor and a vacuum pump of a matched plastic pipe extruder are used, a motor shaft of the first motor drives a driving belt pulley to rotate, a transmission belt and a driven belt pulley rotate along with the driving belt pulley, the driven belt pulley drives an extrusion screw to rotate, and the vacuum pump is used for vacuumizing an inner cavity of an extrusion shell through a vacuum tube; adding a reinforced inner layer mixture from a first feeding box, continuously shearing and crushing the reinforced inner layer mixture by a first crushing cutter and a second crushing cutter after the reinforced inner layer mixture enters a feeding cavity, filtering the mixture by a first filter plate and a second filter plate, allowing the filtered mixture to fall into an inner cavity of an extrusion shell, heating the filtered mixture and extruding the filtered mixture by an extrusion screw to form a reinforced inner layer, and moving the reinforced inner layer towards an extrusion die orifice; in the extrusion process of the extrusion screw, part of the reinforced inner layer mixture flows into the secondary extrusion cavity through the filter screen, the second motor is started, and the secondary extrusion screw is driven by the second motor to extrude the reinforced inner layer mixture to the periphery of the extrusion screw through the filter screen; adding a reinforced outer layer mixture from a second feeding box, adding pretreated glass fiber and benzoyl peroxide after the reinforced outer layer mixture enters a feeding cavity, continuously shearing and crushing by a first crushing knife and a second crushing knife, filtering by a first filter plate and a second filter plate, dropping into the cavity of the die through a feeding cavity, extruding at the periphery of the inner layer of the pipe along with the rotation of an extrusion screw, and enabling a flow channel layer to facilitate the flow of raw materials at the outer layer of the pipe to extrude to form a reinforced outer layer; circulating cooling water is introduced from the water circulation port, the cooling water is sprayed out from the spray hole after passing through the water storage area and the spray column, and the reinforced plastic pipeline material is obtained after cooling; the matched plastic pipe extruder can efficiently realize the shearing, crushing, extruding, secondary extruding, die orifice extrusion molding and cooling of the raw materials of the inner layer and the outer layer of the pipe, so that the pipeline material with stable quality is obtained, the production efficiency is improved, and the raw material cost and the processing cost are reduced.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of the plastic pipe extruder of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
FIG. 3 is a cross-sectional view of a first and second addition tank of the present invention.
FIG. 4 is a cross-sectional view of an extrusion die of the present invention.
In the figure: 1. a base; 2. a belt box; 3. a first motor; 4. a drive pulley; 5. a driven pulley; 6. a drive belt; 7. extruding the outer shell; 8. extruding a screw; 9. extruding a die orifice; 10. a cooling tank; 11. a first charging box; 12. a second feed box; 13. a vacuum tube; 14. a vacuum pump; 15. a secondary extrusion cavity; 16. a filter screen; 17. secondary extrusion screw; 18. a second motor; 19. a feeding cavity; 20. an anti-seismic mounting plate; 21. a buffer spring; 22. a first filter plate; 23. a first crushing cutter; 24. a second filter plate; 25. a second crushing cutter; 26. a negative pressure fan; 27. a die opening housing; 28. a mold cavity; 29. a feeding cavity; 30. a runner cavity; 31. cooling the housing; 32. a water circulation port; 33. a water storage area; 34. a jet flow column; 35. and an orifice.
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
Referring to fig. 1 to 4, the preparation process of the reinforced plastic pipe material of the embodiment includes the following steps:
s1, glass fiber pretreatment: uniformly mixing 13 parts by weight of absolute ethyl alcohol and 146 parts by weight of water to obtain an ethanol solution, dissolving 3 parts by weight of vinyl triacetoxysilane in the ethanol solution to obtain a treatment solution, immersing 35 parts by weight of chopped glass fibers in the treatment solution, stirring for 1.5 hours at 76 ℃, and drying at 115 ℃ to obtain pretreated glass fibers;
s2, mixing the raw materials: according to the weight parts, 106 parts of polypropylene, 8 parts of reinforcing additive, 6 parts of silicon dioxide, 4 parts of diatomite and 1.2 parts of antioxidant are uniformly mixed to prepare a reinforcing outer layer mixture; uniformly stirring 116 parts of polypropylene, 13 parts of a reinforcing additive, 3 parts of a lubricant, 0.6 part of an antioxidant and 1.2 parts of benzoyl peroxide to prepare a reinforcing inner layer mixture; the polypropylene is low-fluidity polypropylene, the melt flow rate is 1.0-4.0g/10min under the conditions of 230 ℃ and 2.16kg of load, the length of the chopped glass fiber is 0.2-0.3mm, and the fiber dispersibility is 100%. The antioxidant is tert-butyl p-hydroxyanisole, and the lubricant is glycerol tristearate.
The preparation method of the enhancing additive comprises the following steps:
1) fabric sizing: shaping the skeleton fabric by using an infrared heating oven, wherein the processing temperature is 167 ℃;
2) coating: coating a thermoplastic polyurethane elastomer with the thickness of 0.15mm on the shaped framework fabric, and performing infrared heating and plasticizing at 218 ℃;
3) rolling, cutting and crushing: and (3) calendering the thermoplastic polyurethane elastomer to the surface of the coated and shaped skeleton fabric at 202 ℃, cutting and crushing to obtain the reinforcing additive with the particle size of 10-20 meshes.
The specification of the skeleton fabric is that the density of warp and weft is 32 × 10 per inch, 1000D/5 high-strength high-shrinkage polyester filaments are adopted in the warp direction and twisted for 60-80 turns/m, the yarn is S, Z twisted and arranged at intervals, 1000D/5 high-strength medium-shrinkage polyester filaments are adopted in the weft direction and twisted for 60-80 turns/m, and the tensile strength of the thermoplastic polyurethane elastomer is 40N/mm2The tear strength was 41N/mm and the elongation at break was 600%.
S3, melt co-extrusion: a first motor 3 and a vacuum pump 14 of the plastic pipe extruder are started, a motor shaft of the first motor 3 drives a driving belt pulley 4 to rotate, a transmission belt 6 and a driven belt pulley 5 rotate along with the driving belt pulley, the driven belt pulley 5 drives an extrusion screw 8 to rotate, and the vacuum pump 14 vacuumizes an inner cavity of an extrusion shell 7 through a vacuum tube 13;
adding a reinforced inner layer mixture from a first feeding box 11, after the reinforced inner layer mixture enters a feeding cavity 19, continuously shearing and crushing by a first crushing cutter 23 and a second crushing cutter 25, filtering by a first filter plate 22 and a second filter plate 24, falling into an inner cavity of an extrusion shell 7, heating and extruding by a rotary extrusion screw 8 to form a reinforced inner layer, and moving towards an extrusion die orifice 9;
in the extrusion process of the extrusion screw 8, part of the reinforced inner layer mixture flows into the secondary extrusion cavity 15 through the filter screen 16, the second motor 18 is started, and the secondary extrusion screw 17 is driven by the second motor 18 to extrude the reinforced inner layer mixture to the periphery of the extrusion screw 8 through the filter screen 16;
adding a reinforced outer layer mixture from a second feeding box 12, adding 25-45 parts of pretreated glass fiber and 0.5-2 parts of benzoyl peroxide according to parts by weight after the reinforced outer layer mixture enters a feeding cavity 19, continuously shearing and crushing by a first crushing knife 23 and a second crushing knife 25, filtering by a first filter plate 22 and a second filter plate 24, then dropping into a die cavity 28 through a feeding cavity 29, extruding the mixture at the periphery of the inner layer of the pipe along with the rotation of an extrusion screw 8, facilitating the flow of the raw material of the outer layer of the pipe by a flow channel layer 30, and extruding the mixture at the temperature of 190 ℃ and 210 ℃ to form a reinforced outer layer; and circulating cooling water is introduced from the water circulation port 32, passes through the water storage area 33 and the jet flow column 34 and is sprayed out from the jet flow hole 35, and the reinforced plastic pipeline material is obtained after cooling.
Example 2
Referring to fig. 1 to 4, the preparation process of the reinforced plastic pipe material of the embodiment includes the following steps:
s1, glass fiber pretreatment: uniformly mixing 14 parts by weight of absolute ethyl alcohol and 136 parts by weight of water to obtain an ethanol solution, dissolving 3.5 parts by weight of vinyl triacetoxysilane in the ethanol solution to obtain a treatment solution, immersing 32 parts by weight of chopped glass fibers in the treatment solution, stirring for 1.8 hours at 76 ℃, and drying at 115 ℃ to obtain pretreated glass fibers;
s2, mixing the raw materials: uniformly mixing 112 parts of polypropylene, 9 parts of a reinforcing additive, 7 parts of silicon dioxide, 5 parts of diatomite and 1.4 parts of an antioxidant in parts by weight to prepare a reinforcing outer layer mixture; uniformly stirring 122 parts of polypropylene, 14 parts of a reinforcing additive, 4 parts of a lubricant, 0.8 part of an antioxidant and 1.2 parts of benzoyl peroxide to prepare a reinforcing inner layer mixture; the polypropylene is low-fluidity polypropylene, the melt flow rate is 1.0-4.0g/10min under the conditions of 230 ℃ and 2.16kg of load, the length of the chopped glass fiber is 0.2-0.3mm, and the fiber dispersibility is 100%.
The antioxidant is formed by mixing 2, 6-di-tert-butyl-p-cresol and tert-butyl-p-hydroxyanisole according to the mass ratio of 1:1, and the lubricant is formed by mixing magnesium stearate and erucamide according to the mass ratio of 2: 1.
The preparation method of the enhancing additive comprises the following steps:
1) fabric sizing: shaping the skeleton fabric by using an infrared heating oven, wherein the processing temperature is 172 ℃;
2) coating: coating a thermoplastic polyurethane elastomer with the thickness of 0.18mm on the shaped framework fabric, and performing infrared heating and plasticizing at 216 ℃;
3) rolling, cutting and crushing: and (3) calendering the thermoplastic polyurethane elastomer to the surface of the coated and shaped skeleton fabric at 206 ℃, cutting and crushing to obtain the reinforcing additive with the particle size of 10-20 meshes.
The specification of the skeleton fabric is that the density of warp and weft is 32 × 10 per inch, 1000D/5 high-strength high-shrinkage polyester filaments are adopted in the warp direction and twisted for 60-80 turns/m, the yarn is S, Z twisted and arranged at intervals, 1000D/5 high-strength medium-shrinkage polyester filaments are adopted in the weft direction and twisted for 60-80 turns/m, and the tensile strength of the thermoplastic polyurethane elastomer is 40N/mm2The tear strength was 41N/mm and the elongation at break was 600%.
S3, melt co-extrusion: a first motor 3 and a vacuum pump 14 of the plastic pipe extruder are started, a motor shaft of the first motor 3 drives a driving belt pulley 4 to rotate, a transmission belt 6 and a driven belt pulley 5 rotate along with the driving belt pulley, the driven belt pulley 5 drives an extrusion screw 8 to rotate, and the vacuum pump 14 vacuumizes an inner cavity of an extrusion shell 7 through a vacuum tube 13;
adding a reinforced inner layer mixture from a first feeding box 11, after the reinforced inner layer mixture enters a feeding cavity 19, continuously shearing and crushing by a first crushing cutter 23 and a second crushing cutter 25, filtering by a first filter plate 22 and a second filter plate 24, falling into an inner cavity of an extrusion shell 7, heating and extruding by a rotary extrusion screw 8 to form a reinforced inner layer, and moving towards an extrusion die orifice 9;
in the extrusion process of the extrusion screw 8, part of the reinforced inner layer mixture flows into the secondary extrusion cavity 15 through the filter screen 16, the second motor 18 is started, and the secondary extrusion screw 17 is driven by the second motor 18 to extrude the reinforced inner layer mixture to the periphery of the extrusion screw 8 through the filter screen 16;
adding a reinforced outer layer mixture from a second feeding box 12, adding 25-45 parts of pretreated glass fiber and 0.5-2 parts of benzoyl peroxide into the reinforced outer layer mixture after the reinforced outer layer mixture enters a feeding cavity 19 according to the parts by weight, continuously shearing and crushing the reinforced outer layer mixture by a first crushing knife 23 and a second crushing knife 25, filtering the reinforced outer layer mixture by a first filter plate 22 and a second filter plate 24, then allowing the filtered reinforced outer layer mixture to fall into a die cavity 28 through a feeding cavity 29, extruding the filtered reinforced outer layer mixture to the periphery of the inner layer of the pipe along with the rotation of an extrusion screw 8, and allowing a flow channel layer 30 to facilitate the flow of the raw materials of the outer layer of the; and circulating cooling water is introduced from the water circulation port 32, passes through the water storage area 33 and the jet flow column 34 and is sprayed out from the jet flow hole 35, and the reinforced plastic pipeline material is obtained after cooling.
Example 3
Referring to fig. 1 to 4, the preparation process of the reinforced plastic pipe material of the embodiment includes the following steps:
s1, glass fiber pretreatment: uniformly mixing 15 parts by weight of absolute ethyl alcohol and 156 parts by weight of water to obtain an ethanol solution, dissolving 3.6 parts by weight of vinyl triacetoxysilane in the ethanol solution to obtain a treatment solution, immersing 36 parts by weight of chopped glass fibers in the treatment solution, stirring for 2 hours at 80 ℃, and drying at 115 ℃ to obtain pretreated glass fibers;
s2, mixing the raw materials: uniformly mixing 112 parts of polypropylene, 9 parts of a reinforcing additive, 7 parts of silicon dioxide, 5 parts of diatomite and 1.3 parts of an antioxidant in parts by weight to prepare a reinforcing outer layer mixture; uniformly stirring 120 parts of polypropylene, 13 parts of a reinforcing additive, 4 parts of a lubricant, 0.7 part of an antioxidant and 1.6 parts of benzoyl peroxide to prepare a reinforcing inner layer mixture; the polypropylene is low-fluidity polypropylene, the melt flow rate is 1.0-4.0g/10min under the conditions of 230 ℃ and 2.16kg of load, the length of the chopped glass fiber is 0.2-0.3mm, and the fiber dispersibility is 100%.
The antioxidant is prepared by mixing tert-butyl p-hydroxyanisole and tert-butyl p-hydroxyanisole according to the mass ratio of 1:1, and the lubricant is prepared by mixing glycerol tristearate and n-butyl stearate according to the mass ratio of 1: 2.
The preparation method of the enhancing additive comprises the following steps:
1) fabric sizing: shaping the skeleton fabric by using an infrared heating oven, wherein the processing temperature is 172 ℃;
2) coating: coating a thermoplastic polyurethane elastomer with the thickness of 0.2mm on the shaped framework fabric, and performing infrared heating and plasticizing at 220 ℃;
3) rolling, cutting and crushing: and (3) calendering the thermoplastic polyurethane elastomer to the surface of the coated and shaped skeleton fabric at 208 ℃, cutting and crushing to obtain the reinforcing additive with the particle size of 10-20 meshes.
The specification of the skeleton fabric is that the density of warp and weft is 32 × 10 per inch, 1000D/5 high-strength high-shrinkage polyester filaments are adopted in the warp direction and twisted for 60-80 turns/m, the yarn is S, Z twisted and arranged at intervals, 1000D/5 high-strength medium-shrinkage polyester filaments are adopted in the weft direction and twisted for 60-80 turns/m, and the tensile strength of the thermoplastic polyurethane elastomer is 40N/mm2The tear strength was 41N/mm and the elongation at break was 600%.
S3, melt co-extrusion: a first motor 3 and a vacuum pump 14 of the plastic pipe extruder are started, a motor shaft of the first motor 3 drives a driving belt pulley 4 to rotate, a transmission belt 6 and a driven belt pulley 5 rotate along with the driving belt pulley, the driven belt pulley 5 drives an extrusion screw 8 to rotate, and the vacuum pump 14 vacuumizes an inner cavity of an extrusion shell 7 through a vacuum tube 13;
adding a reinforced inner layer mixture from a first feeding box 11, after the reinforced inner layer mixture enters a feeding cavity 19, continuously shearing and crushing by a first crushing cutter 23 and a second crushing cutter 25, filtering by a first filter plate 22 and a second filter plate 24, falling into an inner cavity of an extrusion shell 7, heating and extruding by a rotary extrusion screw 8 to form a reinforced inner layer, and moving towards an extrusion die orifice 9;
in the extrusion process of the extrusion screw 8, part of the reinforced inner layer mixture flows into the secondary extrusion cavity 15 through the filter screen 16, the second motor 18 is started, and the secondary extrusion screw 17 is driven by the second motor 18 to extrude the reinforced inner layer mixture to the periphery of the extrusion screw 8 through the filter screen 16;
adding a reinforced outer layer mixture from a second feeding box 12, adding 25-45 parts of pretreated glass fiber and 0.5-2 parts of benzoyl peroxide according to parts by weight after the reinforced outer layer mixture enters a feeding cavity 19, continuously shearing and crushing by a first crushing knife 23 and a second crushing knife 25, filtering by a first filter plate 22 and a second filter plate 24, then dropping into a die cavity 28 through a feeding cavity 29, extruding the mixture at the periphery of the inner layer of the pipe along with the rotation of an extrusion screw 8, facilitating the flow of the raw material of the outer layer of the pipe by a flow channel layer 30, and extruding the mixture at the temperature of 190 ℃ and 210 ℃ to form a reinforced outer layer; and circulating cooling water is introduced from the water circulation port 32, passes through the water storage area 33 and the jet flow column 34 and is sprayed out from the jet flow hole 35, and the reinforced plastic pipeline material is obtained after cooling.
Example 4
Referring to fig. 1-4, the present embodiment provides a plastic pipe extruder, which is suitable for melt co-extrusion molding of the reinforced plastic pipe material of the present invention, and includes a base 1, a belt box 2 mounted on the base 1, a transmission mechanism, and an extrusion mechanism.
Wherein, drive mechanism includes first motor 3, drive pulley 4, driven pulley 5, driving belt 6, and on first motor 3 was fixed in base 1, drive pulley 4, driven pulley 5, driving belt 6 located belt box 2, and the motor shaft of first motor 3 and the axle center fixed connection of drive pulley 4, and driving belt 6 encircles the periphery that sets up at drive pulley 4 and driven pulley 5. The extruding mechanism comprises an extruding shell 7, an extruding screw 8, an extruding die orifice 9 and a cooling box 10, the extruding shell 7 is cuboid and is arranged on one side of the belt box 2, the extruding screw 8 is horizontally arranged in an inner cavity of the extruding shell 7, one end of the extruding screw is fixedly connected with the axle center of the driven belt pulley 5, and the other end of the extruding screw extends into the extruding die orifice 9. The top of the extrusion shell 7 close to the belt box 2 is provided with a first feed box 11, and the top of the extrusion die orifice 9 is provided with a second feed box 12. The bottom of the extrusion housing 7 near the belt box 2 is connected to a vacuum pump 14 via a vacuum tube 13. The bottom of the extrusion shell 7 close to the extrusion die opening 9 is provided with a secondary extrusion cavity 15, the top of the secondary extrusion cavity 15 is provided with a filter screen 16 communicated with the inner cavity of the extrusion shell 7, a secondary extrusion screw 17 communicated with the filter screen 16 is arranged in the secondary extrusion cavity 15, and one end of the secondary extrusion screw 17 is connected with a motor shaft of a second motor 18. Wherein the diameter of the mesh of the filter screen 16 is 0.6-1.2 cm.
First charging box 11 is the same with the structure of second charging box 12, including feeding chamber 19, one side of feeding chamber 19 is equipped with vertical antidetonation mounting panel 20, the top and the bottom of antidetonation mounting panel 20 all are equipped with buffer spring 21, be connected with the first filter 22 of a plurality of towards feeding chamber 19 on the antidetonation mounting panel 20, the end connection of first filter 22 has first crushing sword 23, the opposite side of feeding chamber 19 is equipped with the second filter 24 crisscross with first filter 22, the end connection of second filter 24 has the second to smash sword 25. The bottom of the anti-seismic mounting plate 20 is provided with a negative pressure fan 26. Wherein the first filter plate 22 and the second filter plate 24 have filter holes with a diameter of 0.2-0.4 mm.
The extrusion die orifice 9 comprises a die orifice shell 27 and a die orifice cavity 28, a feeding cavity 29 communicated with the feeding cavity 19 is obliquely arranged on the periphery of the die orifice cavity 28 close to the extrusion shell 7, and a plurality of runner cavities 30 are equidistantly arranged on the periphery of the die orifice cavity 28 far away from the extrusion shell 7.
The cooling box 10 comprises a cooling shell 31 and a water circulation port 32, wherein the water circulation port 32 is arranged on the periphery of the cooling shell 31, a water storage area 33 is arranged in an inner cavity of the cooling shell 31, a plurality of jet flow columns 34 facing to a cavity of the cooling shell 31 are arranged on the inner side of the water storage area 33, and jet holes 35 are formed in the jet flow columns 34.
The working method of the plastic pipe extruder in the embodiment comprises the following steps:
s1, starting the first motor 3 and the vacuum pump 14, driving the driving belt pulley 4 to rotate by the motor shaft of the first motor 3, driving the driving belt 6 and the driven belt pulley 5 to rotate along with the driving belt, driving the extrusion screw 8 to rotate by the driven belt pulley 5, and vacuumizing the inner cavity of the extrusion shell 7 by the vacuum pump 14 through the vacuum tube 13;
s2, adding inner-layer raw materials of the pipe from the first feeding box 11, enabling the inner-layer raw materials of the pipe to enter the feeding cavity 19, continuously shearing and crushing the inner-layer raw materials by the first crushing cutter 23 and the second crushing cutter 25, filtering the inner-layer raw materials by the first filter plate 22 and the second filter plate 24, enabling the inner-layer raw materials to fall into the inner cavity of the extrusion shell 7, heating the inner-layer raw materials, extruding the inner-layer raw materials by the rotation of the extrusion screw 8 to form a pipe blank, and moving the pipe blank towards the direction of;
s3, in the extrusion process of the extrusion screw 8, part of the raw material of the inner layer of the pipe flows into the secondary extrusion cavity 15 through the filter screen 16; the second motor 18 is started, the second motor 18 drives the secondary extrusion screw 17 to extrude the raw material of the inner layer of the pipe to the periphery of the extrusion screw 8 through the filter screen 16, so that the raw material of the inner layer of the pipe can be continuously extruded conveniently;
s4, adding the outer layer raw material of the pipe from the second feeding box 12, enabling the outer layer raw material of the pipe to enter the feeding cavity 19, then enabling the outer layer raw material of the pipe to be continuously sheared and crushed through the first crushing cutter 23 and the second crushing cutter 25, enabling the outer layer raw material of the pipe to fall into the die cavity 28 through the feeding cavity 29 after being filtered by the first filter plate 22 and the second filter plate 24, enabling the outer layer raw material of the pipe to be extruded out of the periphery of the inner layer of the pipe along with the rotation of the extrusion screw 8, and enabling the outer layer raw material of the pipe;
and S5, circulating cooling water is introduced from the water circulation port 32, passes through the water storage area 33 and the jet flow column 34 and is sprayed out from the jet flow hole 35, and the pipe is cooled and discharged.
Comparative example 1
This comparative example differs from example 1 in that step S3 does not add pre-treated glass fiber and benzoyl peroxide.
Comparative example 2
This comparative example differs from example 1 in that no reinforcing additive is added in step S2.
Examples of the experiments
According to the industrial standard CJ/T278-:
TABLE 1 enhanced plastic pipe material physical and mechanical property test
Figure BDA0002472229780000151
As can be seen from the table above, the reinforced plastic pipeline material of the embodiment of the invention has the advantages that the longitudinal retraction rate reaches 1.5-1.8%, and the reinforced plastic pipeline material has no bubbles and cracks and is superior to a comparative example; the test of the pipe heating oven accords with the GB/T8803, the pipe falling test has no crack, and the falling hammer impact test reaches 6.8-7.5 percent, which is superior to the comparative example; the ring stiffness was between 4.8% and 5.2%, both > 4.0%, superior to the comparative examples. Therefore, the reinforced plastic pipeline material prepared by the invention has excellent physical and mechanical properties, and good strength and impact resistance.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims (8)

1. A preparation process of a reinforced plastic pipeline material is characterized by comprising the following steps:
s1, glass fiber pretreatment: according to the weight parts, 10-15 parts of absolute ethyl alcohol and 160 parts of 120-type water are uniformly mixed to obtain an ethanol solution, 1.5-4 parts of vinyl triacetoxysilane is dissolved in the ethanol solution to obtain a treatment solution, 20-40 parts of chopped glass fiber is immersed in the treatment solution, stirred at 70-80 ℃ for 1-2h, and dried at 100-type water and 120 ℃ to obtain pretreated glass fiber;
s2, mixing the raw materials: according to the weight parts, 85-120 parts of polypropylene, 5-10 parts of reinforcing additive, 3-8 parts of silicon dioxide, 2-6 parts of diatomite and 0.6-1.5 parts of antioxidant are uniformly mixed to prepare a reinforcing outer layer mixture; uniformly stirring 125 parts of 110-one polypropylene, 6-15 parts of reinforcing additive, 2-4 parts of lubricant, 0.5-1 part of antioxidant and 0.5-2 parts of benzoyl peroxide to prepare a reinforcing inner layer mixture;
s3, melt co-extrusion: a first motor (3) and a vacuum pump (14) of the plastic pipe extruder are started, a motor shaft of the first motor (3) drives a driving belt pulley (4) to rotate, a transmission belt (6) and a driven belt pulley (5) rotate along with the driving belt pulley, the driven belt pulley (5) drives an extrusion screw (8) to rotate, and the vacuum pump (14) pumps vacuum to an inner cavity of an extrusion shell (7) through a vacuum pipe (13);
adding a reinforced inner layer mixture from a first feeding box (11), wherein the reinforced inner layer mixture enters a feeding cavity (19) and then is continuously sheared and crushed by a first crushing knife (23) and a second crushing knife (25), a first filter plate (22) and a second filter plate (24) are filtered and fall into an inner cavity of an extrusion shell (7), a reinforced inner layer is formed after heating and rotary extrusion of an extrusion screw (8), and the reinforced inner layer moves towards an extrusion die orifice (9);
in the extrusion process of the extrusion screw (8), part of the reinforced inner layer mixture flows into the secondary extrusion cavity (15) through the filter screen (16), the second motor (18) is started, and the second motor (18) drives the secondary extrusion screw (17) to extrude the reinforced inner layer mixture to the periphery of the extrusion screw (8) through the filter screen (16);
adding a reinforced outer layer mixture from a second feeding box (12), adding 25-45 parts of pretreated glass fiber and 0.5-2 parts of benzoyl peroxide according to parts by weight after the reinforced outer layer mixture enters a feeding cavity (19), continuously shearing and crushing by a first crushing knife (23) and a second crushing knife (25), filtering by a first filter plate (22) and a second filter plate (24), dropping into a die cavity (28) through a feeding cavity (29), extruding at the periphery of the inner layer of the pipe along with the rotation of an extrusion screw (8), enabling a flow channel layer (30) to facilitate the flow of the outer layer raw material of the pipe, and extruding at the temperature of 190 plus 210 ℃ to form a reinforced outer layer; circulating cooling water is introduced from the water circulating port (32), the cooling water passes through the water storage area (33) and the jet flow column (34) and then is sprayed out from the jet flow hole (35), and the reinforced plastic pipeline material is obtained after cooling.
2. The process for preparing a reinforced plastic pipe material according to claim 1, wherein the reinforcing additive is prepared by the following steps:
1) fabric sizing: shaping the skeleton fabric by using an infrared heating oven, wherein the processing temperature is 160-175 ℃;
2) coating: coating a thermoplastic polyurethane elastomer with the thickness of 0.1-0.2mm on the shaping framework fabric, and plasticizing by infrared heating at 210-220 ℃;
3) rolling, cutting and crushing: and (3) calendering the thermoplastic polyurethane elastomer to the surface of the coated and shaped skeleton fabric at the temperature of 190-210 ℃, cutting and crushing to obtain the reinforcing additive with the particle size of 10-20 meshes.
3. The preparation process of the reinforced plastic pipeline material as claimed in claim 2, wherein the skeleton fabric has a warp and weft density of 32 × 10 pieces/inch, 1000D/5 high-strength high-shrinkage polyester filaments are adopted in the warp direction and twisted for 60-80 r/m, the yarns are arranged at intervals in a twisting mode of S, Z, 1000D/5 high-strength medium-shrinkage polyester filaments are adopted in the weft direction and twisted for 60-80 r/m, and the tensile strength of the thermoplastic polyurethane elastomer is 40N/mm2The tear strength was 41N/mm and the elongation at break was 600%.
4. The process for preparing a reinforced plastic pipe material as claimed in claim 1, wherein the polypropylene is low-fluidity polypropylene, the melt flow rate under the condition of 230 ℃ and 2.16kg load is 1.0-4.0g/10min, the length of the chopped glass fiber is 0.2-0.3mm, and the fiber dispersibility is 100%.
5. The process for preparing a reinforced plastic pipe material as claimed in claim 1, wherein the antioxidant is a mixture of one or more of 2, 6-di-tert-butyl-p-cresol, tert-butyl-p-hydroxyanisole, and the lubricant is a mixture of one or more of magnesium stearate, erucamide, glycerol tristearate, and n-butyl stearate.
6. The process for preparing the reinforced plastic pipe material according to claim 1, wherein the plastic pipe extruder comprises a base (1), a belt box (2) arranged on the base (1), a transmission mechanism and an extrusion mechanism;
the transmission mechanism comprises a first motor (3), a driving belt pulley (4), a driven belt pulley (5) and a transmission belt (6), wherein the first motor (3) is fixed on the base (1), the driving belt pulley (4), the driven belt pulley (5) and the transmission belt (6) are arranged in the belt box (2), a motor shaft of the first motor (3) is fixedly connected with the axis of the driving belt pulley (4), and the transmission belt (6) is arranged around the periphery of the driving belt pulley (4) and the driven belt pulley (5); the extruding mechanism comprises an extruding shell (7), an extruding screw (8), an extruding die orifice (9) and a cooling box (10), the extruding shell (7) is cuboid and is arranged on one side of the belt box (2), the extruding screw (8) is horizontally arranged in an inner cavity of the extruding shell (7), one end of the extruding screw is fixedly connected with the axis of the driven belt pulley (5), and the other end of the extruding screw extends into the extruding die orifice (9); a first feeding box (11) is arranged at the top of the extrusion shell (7) close to the belt box (2), and a second feeding box (12) is arranged at the top of the extrusion die orifice (9); the bottom of the extrusion shell (7) close to the belt box (2) is connected with a vacuum pump (14) through a vacuum pipe (13); a secondary extrusion cavity (15) is formed in the bottom, close to the extrusion die opening (9), of the extrusion shell (7), a filter screen (16) communicated with the inner cavity of the extrusion shell (7) is arranged at the top of the secondary extrusion cavity (15), a secondary extrusion screw (17) communicated with the filter screen (16) is arranged in the secondary extrusion cavity (15), and one end of the secondary extrusion screw (17) is connected with a motor shaft of a second motor (18); the diameter of the mesh of the filter screen (16) is 0.6-1.2 cm;
the extrusion die orifice (9) comprises a die orifice shell (27) and a die orifice cavity (28), a feeding cavity (29) communicated with the feeding cavity (19) is obliquely arranged on the periphery of the die orifice cavity (28) close to the extrusion shell (7), and a plurality of runner cavities (30) are equidistantly arranged on the periphery of the die orifice cavity (28) far away from the extrusion shell (7).
7. The preparation process of the reinforced plastic pipeline material according to claim 6, wherein the first feeding box (11) and the second feeding box (12) have the same structure and comprise a feeding cavity (19), one side of the feeding cavity (19) is provided with a vertical anti-seismic mounting plate (20), the top and the bottom of the anti-seismic mounting plate (20) are respectively provided with a buffer spring (21), the anti-seismic mounting plate (20) is connected with a plurality of first filter plates (22) facing the feeding cavity (19), the end parts of the first filter plates (22) are connected with first crushing cutters (23), the other side of the feeding cavity (19) is provided with second filter plates (24) staggered with the first filter plates (22), and the end parts of the second filter plates (24) are connected with second crushing cutters (25); a negative pressure fan (26) is arranged at the bottom of the anti-seismic mounting plate (20); wherein the diameter of the filter holes of the first filter plate (22) and the second filter plate (24) is 0.2-0.4 mm.
8. The preparation process of the reinforced plastic pipeline material as recited in claim 6, wherein the cooling tank (10) comprises a cooling shell (31) and a water circulation port (32), the water circulation port (32) is arranged on the periphery of the cooling shell (31), a water storage area (33) is arranged in the inner cavity of the cooling shell (31), a plurality of jet flow columns (34) facing the cavity of the cooling shell (31) are arranged on the inner side of the water storage area (33), and jet holes (35) are arranged in the jet flow columns (34).
CN202010352162.7A 2020-04-28 2020-04-28 Preparation process of reinforced plastic pipeline material Withdrawn CN111483126A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113309907A (en) * 2021-06-07 2021-08-27 安徽杰蓝特新材料有限公司 High-strength PP pipe for drainage and processing technology thereof
CN113580604A (en) * 2021-07-28 2021-11-02 浙江隆源高分子科技有限公司 EVA sheet production process and equipment
CN115125730A (en) * 2022-08-01 2022-09-30 湖南佑华医疗用品有限公司 Isolation clothes with high protective performance and preparation method thereof
CN117183276A (en) * 2023-09-11 2023-12-08 石家庄通达塑料制品有限公司 Extruder and process for plastic pipe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113309907A (en) * 2021-06-07 2021-08-27 安徽杰蓝特新材料有限公司 High-strength PP pipe for drainage and processing technology thereof
CN113309907B (en) * 2021-06-07 2022-07-26 安徽杰蓝特新材料有限公司 High-strength PP pipe for drainage and processing technology thereof
CN113580604A (en) * 2021-07-28 2021-11-02 浙江隆源高分子科技有限公司 EVA sheet production process and equipment
CN115125730A (en) * 2022-08-01 2022-09-30 湖南佑华医疗用品有限公司 Isolation clothes with high protective performance and preparation method thereof
CN117183276A (en) * 2023-09-11 2023-12-08 石家庄通达塑料制品有限公司 Extruder and process for plastic pipe
CN117183276B (en) * 2023-09-11 2024-04-16 石家庄通达塑料制品有限公司 Extruder and process for plastic pipe

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Application publication date: 20200804