CN111231259B - Integral forming method of PVC corrugated pipe - Google Patents

Integral forming method of PVC corrugated pipe Download PDF

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Publication number
CN111231259B
CN111231259B CN202010197144.6A CN202010197144A CN111231259B CN 111231259 B CN111231259 B CN 111231259B CN 202010197144 A CN202010197144 A CN 202010197144A CN 111231259 B CN111231259 B CN 111231259B
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corrugated pipe
parts
pipe
water
water inlet
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CN111231259A (en
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粟阳
张伟军
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Chongqing Jinshan Yangsheng Pipeline Co ltd
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Chongqing Jinshan Yangsheng Pipeline Co ltd
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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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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
    • B29C48/03—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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/08—Belling or enlarging, e.g. combined with forming a groove using pressure difference
    • 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
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

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

Abstract

The invention belongs to the technical field of corrugated pipe preparation, and particularly relates to an integrated forming method of a PVC corrugated pipe, which comprises the following processing steps: (1) preparing the following raw materials in parts by mass: 50-150 parts of polyvinyl chloride resin, 18-32 parts of nano filling material, 0.5-5 parts of pigment, 2-20 parts of lead-free stabilizer, 1-20 parts of processing aid, 0.1-5 parts of lubricant, 0.1-2 parts of light stabilizer and 1-15 parts of impact modifier; (2) mixing and processing: firstly, mixing the raw materials at 110-130 ℃, and then cooling and stirring the raw materials at 40-52 ℃; (3) and (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder; (4) shaping: the extruded raw materials are sequentially sent into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and the PVC corrugated pipe is shaped and forms a flaring; (5) and (6) cooling and cutting. The PVC corrugated pipe prepared by the scheme has the advantages of improved ring rigidity, good toughness, aging resistance and greatly improved impact strength.

Description

Integral forming method of PVC corrugated pipe
Technical Field
The invention belongs to the technical field of corrugated pipe preparation, and particularly relates to an integrated forming method of a PVC corrugated pipe.
Background
In recent years, the plastic pipeline industry in China is rapidly developed, the application range of the plastic pipeline is continuously expanded, and the field with the largest market potential is the field of buried drain pipes. With the national accelerated treatment of water pollution, the investment in municipal drainage facilities is growing rapidly.
The double-wall corrugated pipe is a pipe with a trapezoidal hollow structure, the cross section of the pipe wall of the double-wall corrugated pipe is of a double-layer structure, the inner wall of the double-wall corrugated pipe is smooth and flat, and the outer wall of the double-wall corrugated pipe is arranged at equal intervals. The double-wall corrugated pipe is widely applied to the fields of municipal engineering, constructional engineering, electrical telecommunication engineering and the like, and can be used as a drain pipe, a blow-off pipe, a building rainwater pipe, a protection pipe of various power cables and the like. The PVC double-wall corrugated pipe takes rigid polyvinyl chloride as a main raw material, is extruded from the inside and the outside respectively, is formed in one step, has a smooth inner wall, a trapezoidal corrugated outer wall and a hollow plastic pipe with a wall between the inner wall and the outer wall. The PVC double-wall corrugated pipe has the advantages of unique structure, high strength, smooth inner wall, small friction resistance, large circulation, light weight, good leakage resistance effect, resistance to corrosion of various chemical media, buried service life of over fifty years and the like, so that the PVC double-wall corrugated pipe is widely applied.
In the process of producing the PVC double-wall corrugated pipe, in order to enable the PVC double-wall corrugated pipe to be directly and rapidly butted, a flared opening is generally processed at the end of the PVC double-wall corrugated pipe. However, with the existing formulation of the PVC double-wall corrugated pipe, due to the problem of formulation components, in the production process, the outer wall and the inner wall of the heated and melted corrugated pipe cannot be well adhered together under the action of air pressure (the flaring die on the corrugated pipe forming machine cannot realize flaring forming of the PVC double-wall corrugated pipe), that is, the PVC double-wall corrugated pipe cannot realize on-line double-layer flaring forming in the production process, and can only be manufactured into a straight pipe form. After the PVC double-wall corrugated pipe is prepared, the PVC double-wall corrugated pipe needs to be conveyed to flaring equipment for independent flaring processing, continuous operation cannot be realized on the preparation and flaring of the PVC double-wall corrugated pipe, the processing flow is multiple, the operation is troublesome, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide an integrated forming method of a PVC corrugated pipe, and aims to solve the problem that the existing PVC double-wall corrugated pipe cannot realize online double-layer flaring forming.
In order to achieve the purpose, the scheme of the invention is as follows: the integral forming method of the PVC corrugated pipe comprises the following processing steps:
(1) preparing the following raw materials in parts by mass: 50-150 parts of polyvinyl chloride resin, 18-32 parts of nano filling material, 0.5-5 parts of pigment, 2-20 parts of lead-free stabilizer, 1-20 parts of processing aid, 0.1-5 parts of lubricant, 0.1-2 parts of light stabilizer and 1-15 parts of impact modifier;
(2) mixing and processing: firstly, mixing and stirring the raw materials at the temperature of 110-;
(3) and (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder;
(4) shaping: the extruded raw materials are sequentially sent into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and the PVC corrugated pipe is shaped and forms a flaring;
(5) and cooling the PVC corrugated pipe, and cutting after cooling.
The working principle and the beneficial effects of the scheme are as follows: by improving the raw material components of the PVC corrugated pipe, the prepared PVC corrugated pipe has the advantages of improved ring rigidity, good toughness, aging resistance and greatly improved impact strength. Except that the quality of the PVC corrugated pipe is improved, in the production process, materials of the outer wall and the inner wall of the corrugated pipe which are heated and melted can be well adhered to the flaring die of the corrugated pipe forming machine, online double-layer flaring forming is realized in the production process, the PVC corrugated pipe does not need to be conveyed to flaring equipment to be subjected to independent flaring processing, the operation steps are reduced, and the production efficiency is effectively improved.
Optionally, the nano-filler material is calcium carbonate powder with the particle size of 800-.
Optionally, the lubricant is sodium polyethylene; the light stabilizer is titanium dioxide; the stabilizer is a calcium-zinc composite stabilizer.
Optionally, the step (1) includes the following raw materials in parts by weight: 90-120 parts of polyvinyl chloride resin, 24-30 parts of nano filling material, 2-3 parts of pigment, 8-12 parts of lead-free stabilizer, 5-10 parts of processing aid, 1-3 parts of lubricant, 0.8-1.2 parts of light stabilizer and 5-8 parts of impact modifier.
Optionally, in the extrusion processing process, the temperature of the barrel 1 region of the extruder main unit is controlled to be 200-; the confluence core is 190 ℃ and 175 ℃. The long-time research of the applicant confirms that the temperature of different areas of the cylinder of the extruder is controlled within the range, the temperature is proper, the extruder is suitable for plasticizing and extruding materials, and the prepared product has good comprehensive performance.
Optionally, in the shaping process, the temperature of the 1-5 area of the double-wall corrugated pipe extrusion mold is controlled at 190-; the temperature of the zone 1-3 of the internal mold is controlled to be 185-190 ℃, and the temperature of the outlet of the internal mold is controlled to be 210-230 ℃. The long-time research of the applicant confirms that the temperature is controlled within the range, so that the material can be stably molded, and the prepared product has better comprehensive performance.
Optionally, the step of forming the flare in step (4) is: two flaring dies which are symmetrically arranged are arranged in a corrugated pipe forming machine, when the two flaring dies are closed, the outer wall of the corrugated pipe is adsorbed on the flaring dies in a vacuumizing mode, and meanwhile, the inner wall of the corrugated pipe is attached to the outer wall of the corrugated pipe in an air pressure increasing mode, so that the inner wall and the outer wall of the corrugated pipe are completely attached to form a flaring. By adopting the mode to perform flaring processing on the PVC corrugated pipe, online double-layer flaring forming is realized in the production process, the PVC corrugated pipe does not need to be conveyed to flaring equipment for independent flaring processing, the operation steps are reduced, and the production efficiency is effectively improved.
Optionally, the corrugated pipe forming machine used in step (4) comprises a frame and two symmetrically arranged operation units; the operation unit comprises a conveying belt, a die set, a cooling water storage tank and a water pump which are fixed on the rack; each mould of the mould group is provided with a cooling mechanism, the cooling mechanism comprises a water inlet pipe, a water outlet pipe, a flow passage, a water inlet passage, a water outlet passage, a first sliding groove and a second sliding groove, the first sliding groove and the second sliding groove are positioned on one side, away from the conveying belt, of the mould, the flow passage, the water inlet passage and the water outlet passage are positioned in the mould, the water inlet pipe is connected with the water inlet passage, and the water outlet pipe is connected with the water outlet passage; the water inlet channel and the water drainage channel are both communicated with the flow channel, the first sliding chute is positioned between the water inlet channel and the flow channel and is communicated with the water inlet channel, and the second sliding chute is positioned between the water drainage channel and the flow channel and is communicated with the water drainage channel; a first magnet is connected in the first sliding groove in a sliding manner, and a first through hole which can be communicated with the water inlet channel is formed in the first magnet; a first elastic piece is connected between the first magnet and the first sliding chute, and the first magnet can block the water inlet channel under the action of the first elastic piece; a second magnet is connected in the second sliding groove in a sliding manner, and a second through hole capable of being communicated with the drainage channel is formed in the second magnet; a second elastic piece is connected between the second magnet and the second sliding chute, and the second magnet can block the drainage channel under the action of the second elastic piece; the conveying belt is provided with an annular connecting pipe, and a water inlet pipe and a water outlet pipe on the die are both communicated with the connecting pipe; the die set comprises a flaring die and a plurality of forming dies, and the flaring die and the plurality of forming dies are arranged in parallel and fixed on the surface of the conveying belt; one end of the water pump is connected with the cooling water storage tank, the other end of the water pump is connected with a water outlet pipe, and the water outlet pipe is communicated with the connecting pipe; the cooling water storage tank is connected with a water inlet pipe which is communicated with the connecting pipe.
And extruding the material through an extrusion die, feeding the extruded material into a corrugated pipe forming machine, and forming a flaring by the corrugated pipe forming machine. When the corrugated pipe forming machine works, the water pump is started, and under the action of the water pump, water in the cooling water storage tank firstly enters the connecting pipe through the water outlet pipe and flows in the connecting pipe. The conveyer belts on the operation unit drive the flaring dies and the forming dies to move, and when the corresponding dies on the two conveyer belts are close to each other and completely closed, the first magnets and the second magnets on the two dies repel each other. When repelling each other between the first magnet on two moulds, first magnet removes and compresses first elastic component along first spout, and when first elastic component was compressed to a certain degree, first opening and inhalant canal intercommunication on the first magnet, the cooling water that flows in the connecting tube this moment can flow in the inhalant canal, and the cooling water in the inhalant canal can be through inhalant canal entering runner in, make the water in the runner take place to flow. When repelling each other between the second magnet on two moulds, second magnet removes and compresses the second elastic component along the second spout, when the second elastic component was compressed to certain extent, second opening and drainage channel intercommunication on the second magnet, the water that rises through heat exchange temperature in the runner this moment can get into the drain pipe through drainage channel to in getting into the connecting tube through the drain pipe, the water in the connecting tube is through the oral siphon at the entering cooling water storage tank, effectively takes away the heat on the runner mould.
In this scheme, the flow range of cooling water is controlled, and the cooling water can not flow in all moulds on the mould group simultaneously, and only when the mould during operation (also when corresponding mould was closed on two conveyer belts promptly), the runner on this mould could just pass through inhalant canal, drainage channel and connecting pipe intercommunication, and the cooling water could just flow between the runner on cooling water storage tank, connecting pipe, this mould, takes away the heat on the mould rapidly, cools off the bellows. Through setting up like this, the pertinence is high, only cools off the mould that needs the cooling, secondly the flow scope of effective control cooling water makes the cooling water accomplish once circulation in shorter flow for the speed of flow, can be rapid carry out quick cooling to the mould that needs the cooling, cooling performance is good.
Optionally, the water inlet pipe is connected to the cooling water storage tank through a first rotary joint; the water outlet pipe is connected to the water pump through a second rotary joint. When the conveyer belt moved, the one end of oral siphon and outlet pipe all can follow the conveyer belt and move together, set up first rotary joint, second rotary joint and can more for effectual oral siphon, the outlet pipe emergence winding of avoiding.
Optionally, the first elastic member and the second elastic member are both springs.
Drawings
FIG. 1 is a schematic structural diagram of a corrugated pipe forming machine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a forming mold in a bellows forming machine according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a bellows forming machine according to an embodiment of the present invention, when two forming molds are closed.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a conveying belt 10, a forming mold 20, a water inlet pipe 21, a water discharge pipe 22, a flow channel 23, a water inlet channel 24, a first sliding groove 25, a first elastic piece 26, a first magnet 27, a first through hole 271, a cooling water storage tank 30, a water inlet pipe 31, a water pump 40, a water outlet pipe 41, a flaring mold 50 and a connecting pipe 60.
Example one
The integral forming method of the PVC corrugated pipe comprises the following processing steps:
(1) preparing the following raw materials in parts by mass: 100 parts of polyvinyl chloride resin, 20 parts of nano filling material, 3 parts of pigment, 10 parts of lead-free stabilizer, 7 parts of processing aid, 2 parts of lubricant, 1 part of light stabilizer and 6 parts of impact modifier. In this embodiment, the nano-filler is calcium carbonate powder with a particle size of 800 meshes, the lubricant is sodium polyethylene, the light stabilizer is titanium dioxide, and the stabilizer is a calcium-zinc composite stabilizer.
(2) Mixing and processing: the raw materials are firstly mixed and stirred at 120 ℃ and the stirring speed is controlled at 1000r/min, and then the raw materials are cooled and stirred at 45 ℃ and the stirring speed is controlled at 80 r/min.
(3) And (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder; in the extrusion processing process, the temperature of a barrel 1 area of the extruder main unit is controlled to be 220 ℃ plus 200 ℃, the temperature of a barrel 2 area is controlled to be 195 ℃ plus 215 ℃, the temperature of a barrel 3 area is controlled to be 185 ℃ plus 200 ℃, the temperature of a barrel 4 area is controlled to be 180 ℃ plus 195 ℃, and the temperature of a barrel 5 area is controlled to be 170 ℃ plus 185 ℃; the confluence core is 190 ℃ and 175 ℃.
(4) Shaping: and (3) sequentially feeding the extruded raw materials into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and shaping the PVC corrugated pipe and forming a flared opening. The flaring method comprises the following steps: two flaring dies which are symmetrically arranged are arranged in a corrugated pipe forming machine, when the two flaring dies are closed, the outer wall of the corrugated pipe is adsorbed on the flaring dies in a vacuumizing mode, and meanwhile, the inner wall of the corrugated pipe is attached to the outer wall of the corrugated pipe in an air pressure increasing mode, so that the inner wall and the outer wall of the corrugated pipe are completely attached to form a flaring. In the shaping process, the temperature of the 1-5 area of the double-wall corrugated pipe extrusion mould is controlled to be 190 ℃ plus 170 ℃, and the temperature of the 6-10 area is controlled to be 230 ℃ plus 195 ℃; the temperature of the zone 1-3 of the internal mold is controlled to be 185-190 ℃, and the temperature of the outlet of the internal mold is controlled to be 210-230 ℃.
(5) And cooling the PVC corrugated pipe, and cutting after cooling.
As shown in fig. 1, the corrugated pipe forming machine used in step (4) of this embodiment includes a frame and two operation units arranged in an up-down symmetrical manner. The operation unit comprises a conveyor belt 10, a mold group, and a cooling water storage tank 30 and a water pump 40 which are both fixed on the frame, wherein in the embodiment, the cooling water storage tank 30 and the water pump 40 are both positioned in the conveyor belt 10. The die set comprises a plurality of dies, in this embodiment, the die set comprises a flaring die 50 and a plurality of forming dies 20, the flaring die 50 and the forming dies 20 are arranged side by side and are all fixed on the surface of the conveying belt 10, specifically, the flaring die 50 and the forming dies 20 are all fixedly mounted on the conveying belt 10 through mounting seats.
Each mold (refer to the flaring mold 50 and the plurality of forming molds 20) of the mold set is provided with a cooling mechanism, as shown in fig. 2, the cooling mechanism comprises a water inlet pipe 21, a water outlet pipe 22, a flow passage 23, a water inlet passage 24, a water outlet passage, a first sliding groove 25 and a second sliding groove, the first sliding groove 25 and the second sliding groove are positioned at the same side of the mold and are positioned at one end of the mold far away from the conveying belt 10, and two ends of the first sliding groove 25 and the second sliding groove are communicated with the outside. Runner 23, inhalant canal 24 and drainage channel all set up in the mould, inhalant canal 24 and drainage channel all communicate with the tip of runner 23 and are located the mould and keep away from one side of conveyer belt 10, and first spout 25 is located between inhalant canal 24 and runner 23 and communicates with inhalant canal 24, and the second spout is located between drainage channel and runner 23 and communicates with drainage channel. The inlet pipe 21 is connected to the inlet passage 24, and the outlet pipe 22 is connected to the outlet passage.
The first sliding groove 25 is slidably and hermetically connected with a first magnet 27, and the first magnet 27 is provided with a first port 271 which can be communicated with the water inlet channel 24. A first elastic part 26 is connected between the first magnet 27 and the first sliding groove 25, when the first magnet 27 is not acted by other external force, the water inlet channel 24 is blocked by the first elastic part 26, and at the moment, external water cannot enter the flow channel 23 through the water inlet channel 24. The first through hole 271 is located at an end away from the first elastic member 26, and when the first magnet 27 compresses the first elastic member 26 to a certain extent, the first through hole 271 of the first magnet 27 communicates with the water inlet passage 24. The second sliding groove slides in the first sliding groove and is connected with a first magnet in a sealing mode, and a first through hole which can be communicated with the drainage channel is formed in the first magnet. And a second elastic piece is connected between the second magnet and the second sliding groove, when the second magnet does not bear other external force, the second magnet blocks the drainage channel under the action of the second elastic piece, and at the moment, water in the flow channel 23 cannot be discharged through the drainage channel. The second through hole is located the one end of keeping away from the second elastic component, and when the second magnet compressed the second elastic component to a certain extent, the second through hole on the second magnet and drainage channel intercommunication. In this embodiment, the first elastic member 26 and the second elastic member are both springs.
An annular connecting pipe 60 (in the embodiment, the connecting pipe 60 is a corrugated pipe) is fixed on the conveying belt 10, and the specific fixing mode can adopt clamping, binding band binding and other modes; when the conveyer belt 10 moves, the connecting pipe 60 moves together with the conveyer belt 10, and the connecting pipe 60 and the die set are always kept in a relatively static state; the water inlet pipe 21 and the water outlet pipe 22 on the dies (referring to the flaring die 50 and the plurality of forming dies 20 on the die set) are both communicated with the connecting pipe 60, and in the embodiment, the water inlet pipe 21 and the water outlet pipe 22 are both flexible and stretchable corrugated pipes. One end of the water pump 40 is connected with the cooling water storage tank 30, the other end of the water pump 40 is connected with a water outlet pipe 41, the water outlet pipe 41 is connected to the water pump 40 through a second rotary joint, and the water outlet pipe 41 is communicated with the connecting pipe 60. The cooling water storage tank 30 is connected with a water inlet pipe 31, the water inlet pipe 31 is connected to the cooling water storage tank 30 through a first rotary joint, and the water inlet pipe 31 is communicated with the connecting pipe 60. The first rotary joint and the second rotary joint can effectively prevent the water inlet pipe 31 and the water outlet pipe 41 from being wound.
And extruding the material through an extrusion die, feeding the extruded material into a corrugated pipe forming machine, and forming a flaring by the corrugated pipe forming machine. When the corrugated pipe forming machine works, the water pump 40 is started, and under the action of the water pump 40, water in the cooling water storage tank 30 firstly enters the connecting pipe 60 through the water outlet pipe 41 and flows in the connecting pipe 60. The conveyor 10 on the running unit drives the flaring dies 50 and the forming dies 20 to move, and when the corresponding dies on the two conveyor 10 are close to each other and completely closed (as shown in fig. 3), the first magnets 27 and the second magnets on the two dies are mutually repelled because the magnetic poles of the first magnets 27 and the second magnets on the corresponding two dies are the same. When the first magnets 27 on the two molds repel each other, the first magnets 27 move along the first sliding grooves 25 and compress the first elastic members 26, when the first elastic members 26 are compressed to a certain degree, the first through holes 271 on the first magnets 27 are communicated with the water inlet channel 24, at this time, the cooling water flowing in the connecting pipe 60 can flow into the water inlet pipe 21, and the cooling water in the water inlet pipe 21 can enter the flow channel 23 through the water inlet channel 24, so that the water in the flow channel 23 flows. When the second magnets on the two molds repel each other, the second magnets move along the second sliding groove and compress the second elastic part, when the second elastic part is compressed to a certain degree, the second openings on the second magnets are communicated with the drainage channel, at the moment, water in the flow channel 23, which rises through heat exchange temperature, can enter the drainage pipe 22 through the drainage channel and enter the connecting pipe 60 through the drainage pipe 22, and the water in the connecting pipe 60 enters the cooling water storage tank 30 through the water inlet pipe 31, so that heat on the molds of the flow channel 23 is effectively taken away.
Example two
The integral forming method of the PVC corrugated pipe comprises the following processing steps:
(1) preparing the following raw materials in parts by mass: 120 parts of polyvinyl chloride resin, 25 parts of nano filling material, 2.5 parts of pigment, 12 parts of lead-free stabilizer, 8 parts of processing aid, 2 parts of lubricant, 1.2 parts of light stabilizer and 8 parts of impact modifier. In this embodiment, the nano-filler is calcium carbonate powder with a particle size of 900 meshes, the lubricant is sodium polyethylene, the light stabilizer is titanium dioxide, and the stabilizer is a calcium-zinc composite stabilizer.
(2) Mixing and processing: firstly, the raw materials are mixed and stirred at 125 ℃ with the stirring speed controlled at 1000r/min, and then the raw materials are cooled and stirred at 48 ℃ with the stirring speed controlled at 100 r/min.
(3) And (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder; in the extrusion processing process, the temperature of a barrel 1 area of the extruder main unit is controlled to be 220 ℃ plus 200 ℃, the temperature of a barrel 2 area is controlled to be 195 ℃ plus 215 ℃, the temperature of a barrel 3 area is controlled to be 185 ℃ plus 200 ℃, the temperature of a barrel 4 area is controlled to be 180 ℃ plus 195 ℃, and the temperature of a barrel 5 area is controlled to be 170 ℃ plus 185 ℃; the confluence core is 190 ℃ and 175 ℃.
(4) Shaping: and (3) sequentially feeding the extruded raw materials into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and shaping the PVC corrugated pipe and forming a flared opening. The flaring method comprises the following steps: two flaring dies which are symmetrically arranged are arranged in a corrugated pipe forming machine, when the two flaring dies are closed, the outer wall of the corrugated pipe is adsorbed on the flaring dies in a vacuumizing mode, and meanwhile, the inner wall of the corrugated pipe is attached to the outer wall of the corrugated pipe in an air pressure increasing mode, so that the inner wall and the outer wall of the corrugated pipe are completely attached to form a flaring. In the shaping process, the temperature of the 1-5 area of the double-wall corrugated pipe extrusion mould is controlled to be 190 ℃ plus 170 ℃, and the temperature of the 6-10 area is controlled to be 230 ℃ plus 195 ℃; the temperature of the internal mold 1-3 area is controlled at 185-190 ℃, and the temperature of the internal mold outlet is controlled at 210-30 ℃.
(5) And cooling the PVC corrugated pipe, and cutting after cooling.
EXAMPLE III
The integral forming method of the PVC corrugated pipe comprises the following processing steps:
(1) preparing the following raw materials in parts by mass: 140 parts of polyvinyl chloride resin, 30 parts of nano filling material, 2.5 parts of pigment, 12 parts of lead-free stabilizer, 10 parts of processing aid, 3 parts of lubricant, 1 part of light stabilizer and 6 parts of impact modifier. In this embodiment, the nano-filler is calcium carbonate powder with a particle size of 850 meshes, the lubricant is sodium polyethylene, the light stabilizer is titanium dioxide, and the stabilizer is a calcium-zinc composite stabilizer.
(2) Mixing and processing: the raw materials are firstly mixed and stirred at 120 ℃ with the stirring speed controlled at 1000r/min, and then cooled and stirred at 45 ℃ with the stirring speed controlled at 800 r/min.
(3) And (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder; in the extrusion processing process, the temperature of a barrel 1 area of the extruder main unit is controlled to be 220 ℃ plus 200 ℃, the temperature of a barrel 2 area is controlled to be 195 ℃ plus 215 ℃, the temperature of a barrel 3 area is controlled to be 185 ℃ plus 200 ℃, the temperature of a barrel 4 area is controlled to be 180 ℃ plus 195 ℃, and the temperature of a barrel 5 area is controlled to be 170 ℃ plus 185 ℃; the confluence core is 190-175 ℃.
(4) Shaping: and (3) sequentially feeding the extruded raw materials into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and shaping the PVC corrugated pipe and forming a flared opening. The flaring method comprises the following steps: two flaring dies which are symmetrically arranged are arranged in a corrugated pipe forming machine, when the two flaring dies are closed, the outer wall of the corrugated pipe is adsorbed on the flaring dies in a vacuumizing mode, and meanwhile, the inner wall of the corrugated pipe is attached to the outer wall of the corrugated pipe in an air pressure increasing mode, so that the inner wall and the outer wall of the corrugated pipe are completely attached to form a flaring. In the shaping process, the temperature of the 1-5 area of the double-wall corrugated pipe extrusion mould is controlled to be 190 ℃ plus 170 ℃, and the temperature of the 6-10 area is controlled to be 230 ℃ plus 195 ℃; the temperature of the internal mold 1-3 area is controlled at 185-190 ℃, and the temperature of the internal mold outlet is controlled at 210-30 ℃.
(5) And cooling the PVC corrugated pipe, and cutting after cooling.

Claims (9)

  1. The integral forming method of the PVC corrugated pipe is characterized by comprising the following steps: the method comprises the following processing steps:
    (1) preparing the following raw materials in parts by mass: 50-150 parts of polyvinyl chloride resin, 18-32 parts of nano filling material, 0.5-5 parts of pigment, 2-20 parts of lead-free stabilizer, 1-20 parts of processing aid, 0.1-5 parts of lubricant, 0.1-2 parts of light stabilizer and 1-15 parts of impact modifier;
    (2) mixing and processing: firstly, mixing and stirring the raw materials at the temperature of 110-;
    (3) and (3) extrusion processing: feeding the mixed raw materials into an extruder, heating, and plasticizing and extruding by the extruder;
    (4) shaping: the extruded raw materials are sequentially sent into a double-wall corrugated pipe extrusion die and a corrugated pipe forming machine, and the PVC corrugated pipe is shaped and forms a flaring;
    (5) cooling the PVC corrugated pipe, and cutting after cooling;
    the corrugated pipe forming machine used in the step (4) comprises a frame and two symmetrically arranged operation units; the operation unit comprises a conveying belt, a die set, a cooling water storage tank and a water pump which are fixed on the rack; each mould of the mould group is provided with a cooling mechanism, the cooling mechanism comprises a water inlet pipe, a water outlet pipe, a flow passage, a water inlet passage, a water outlet passage, a first sliding groove and a second sliding groove, the first sliding groove and the second sliding groove are positioned on one side, away from the conveying belt, of the mould, the flow passage, the water inlet passage and the water outlet passage are positioned in the mould, the water inlet pipe is connected with the water inlet passage, and the water outlet pipe is connected with the water outlet passage; the water inlet channel and the water drainage channel are both communicated with the flow channel, the first sliding chute is positioned between the water inlet channel and the flow channel and is communicated with the water inlet channel, and the second sliding chute is positioned between the water drainage channel and the flow channel and is communicated with the water drainage channel; a first magnet is connected in the first sliding groove in a sliding manner, and a first through hole which can be communicated with the water inlet channel is formed in the first magnet; a first elastic piece is connected between the first magnet and the first sliding chute, and the first magnet can block the water inlet channel under the action of the first elastic piece; a second magnet is connected in the second sliding groove in a sliding manner, and a second through hole capable of being communicated with the drainage channel is formed in the second magnet; a second elastic piece is connected between the second magnet and the second sliding chute, and the second magnet can block the drainage channel under the action of the second elastic piece; the conveying belt is provided with an annular connecting pipe, and a water inlet pipe and a water outlet pipe on the die are both communicated with the connecting pipe; the die set comprises a flaring die and a plurality of forming dies, and the flaring die and the plurality of forming dies are arranged in parallel and fixed on the surface of the conveying belt; one end of the water pump is connected with the cooling water storage tank, the other end of the water pump is connected with a water outlet pipe, and the water outlet pipe is communicated with the connecting pipe; the cooling water storage tank is connected with a water inlet pipe which is communicated with the connecting pipe.
  2. 2. The PVC corrugated pipe integral molding method according to claim 1, characterized in that: the nano filling material is calcium carbonate powder with the grain diameter of 800-1000 meshes.
  3. 3. The PVC corrugated pipe integral molding method according to claim 2, characterized in that: the lubricant is sodium polyethylene; the light stabilizer is titanium dioxide; the lead-free stabilizer is a calcium-zinc composite stabilizer.
  4. 4. A PVC corrugated pipe integral molding method according to any one of claims 1 to 3, characterized in that: the step (1) comprises the following raw materials in parts by weight: 90-120 parts of polyvinyl chloride resin, 24-30 parts of nano filling material, 2-3 parts of pigment, 8-12 parts of lead-free stabilizer, 5-10 parts of processing aid, 1-3 parts of lubricant, 0.8-1.2 parts of light stabilizer and 5-8 parts of impact modifier.
  5. 5. A PVC corrugated pipe integral molding method according to any one of claims 1 to 3, characterized in that: in the extrusion processing process, the temperature of a barrel 1 area of the extruder main unit is controlled to be 220 ℃ plus 200 ℃, the temperature of a barrel 2 area is controlled to be 195 ℃ plus 215 ℃, the temperature of a barrel 3 area is controlled to be 185 ℃ plus 200 ℃, the temperature of a barrel 4 area is controlled to be 180 ℃ plus 195 ℃, and the temperature of a barrel 5 area is controlled to be 170 ℃ plus 185 ℃; the confluence core is 190 ℃ and 175 ℃.
  6. 6. A PVC corrugated pipe integral molding method according to any one of claims 1 to 3, characterized in that: in the shaping process, the temperature of the 1-5 area of the double-wall corrugated pipe extrusion mould is controlled to be 190 ℃ plus 170 ℃, and the temperature of the 6-10 area is controlled to be 230 ℃ plus 195 ℃; the temperature of the zone 1-3 of the internal mold is controlled to be 185-190 ℃, and the temperature of the outlet of the internal mold is controlled to be 210-230 ℃.
  7. 7. A PVC corrugated pipe integral molding method according to any one of claims 1 to 3, characterized in that: the step of forming the flaring in the step (4) is as follows: two flaring dies which are symmetrically arranged are arranged in a corrugated pipe forming machine, when the two flaring dies are closed, the outer wall of the corrugated pipe is adsorbed on the flaring dies in a vacuumizing mode, and meanwhile, the inner wall of the corrugated pipe is attached to the outer wall of the corrugated pipe in an air pressure increasing mode, so that the inner wall and the outer wall of the corrugated pipe are completely attached to form a flaring.
  8. 8. The PVC corrugated pipe integral molding method according to claim 1, characterized in that: the water inlet pipe is connected to the cooling water storage tank through a first rotary joint; the water outlet pipe is connected to the water pump through a second rotary joint.
  9. 9. The PVC corrugated pipe integral molding method according to claim 8, characterized in that: the first elastic piece and the second elastic piece are both springs.
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CN111823533B (en) * 2020-06-19 2022-05-27 安徽博泰塑业科技有限公司 Ultrahigh molecular weight polyethylene tubular product extrusion moulding device
CN113172856B (en) * 2021-04-13 2022-02-18 安徽国登新材料科技有限公司 Corrugated pipe production manufacturing process
CN114379055B (en) * 2021-11-05 2024-02-27 湖北天霖新材料有限公司 Polyethylene double-wall corrugated pipe forming equipment
CN113954329B (en) * 2021-11-10 2023-12-15 重庆金山洋生管道有限公司 Processing equipment for large-caliber reinforced pipe
CN114571639A (en) * 2022-02-17 2022-06-03 陈冠杰 PVC is rolling die cleaning device for pipe processing
CN114571698A (en) * 2022-03-24 2022-06-03 安徽源锂高新材料有限公司 Production process of double-resistance double-wall corrugated pipe

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CN102516688A (en) * 2011-12-12 2012-06-27 杭州波达塑料科技股份有限公司 Environmentally-friendly rigid polyvinyl chloride (PVC) double-wall corrugated pipe and preparation method thereof
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