CN114621536A - PVC-UH pipe and production process thereof - Google Patents
PVC-UH pipe and production process thereof Download PDFInfo
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- CN114621536A CN114621536A CN202011464265.9A CN202011464265A CN114621536A CN 114621536 A CN114621536 A CN 114621536A CN 202011464265 A CN202011464265 A CN 202011464265A CN 114621536 A CN114621536 A CN 114621536A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 80
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 76
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 38
- 229920003023 plastic Polymers 0.000 claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 239000003381 stabilizer Substances 0.000 claims abstract description 23
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 claims abstract description 22
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical class [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000004698 Polyethylene Substances 0.000 claims abstract description 22
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims abstract description 22
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000000049 pigment Substances 0.000 claims abstract description 22
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 229920000573 polyethylene Polymers 0.000 claims abstract description 22
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 22
- 239000002184 metal Substances 0.000 description 22
- 238000005086 pumping Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- 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
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of polyvinyl chloride pipe production, and particularly relates to a PVC-UH pipe and a production process thereof, wherein the raw materials are as follows in parts by weight: PVC (SG-5): 40-50 parts; polyvinyl chloride PVC (SG-3): 40-50 parts of polyvinyl chloride (PVC) or polyvinyl chloride (SG-4): 40-50 parts; activated calcium carbonate: 5-15 parts of a solvent; calcium zinc stabilizer (307G): 4-5 parts; monoglyceride: 0.1-0.2 parts; polyethylene wax: 0.5-1 part; plastic impact resistant agents MBS, CPE, acrylates: 5-10 parts; pigment (titanium dioxide): 0.1-0.5 parts of the following raw materials in parts by weight: preparing materials; starting the high mixing pot and the low mixing pot for mixing materials; extrusion molding and temperature control; cooling and shaping in vacuum; the pipe is easy to extrude and shape, the production process is simple, and the cost is saved; improved physical and mechanical properties, high ring stress and high impact resistance.
Description
Technical Field
The invention belongs to the technical field of polyvinyl chloride pipe production, and particularly relates to a PVC-UH pipe and a production process thereof.
Background
The PVC-UH (high-performance rigid polyvinyl chloride) pipe adopts polyvinyl chloride as a main raw material, is added with necessary auxiliary agents, is formed by extrusion processing, is used as a novel innovative water supply pipe, improves the mechanical property of a product on the basis of the traditional PVC-U pipe and PVC-M pipe, improves the pipe connection mode, has more excellent pressure resistance, impact resistance and tensile property, has the advantages of acid and alkali resistance, light weight, long service life and the like, and is more and more widely used in the production and life of people. However, the PVC-UH pipe material in the prior art also has the problems of difficult extrusion molding, unstable physical and mechanical properties and complex production process.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a PVC-UH pipe and a production process thereof, wherein the PVC-UH pipe has the advantages of cost saving, easy extrusion and shaping, good physical and mechanical properties and simple production procedures.
The purpose of the invention is realized by the following technical scheme:
the PVC-UH pipe comprises the following raw materials in parts by weight: PVC (SG-5): 40-50 parts; polyvinyl chloride PVC (SG-3): 40-50 parts of polyvinyl chloride (PVC) or polyvinyl chloride (SG-4): 40-50 parts; activated calcium carbonate: 5-15 parts of a solvent; calcium zinc stabilizer (307G): 4-5 parts; monoglyceride: 0.1-0.2 parts; polyethylene wax: 0.5-1 part; plastic impact resistant agents MBS, CPE, acrylates: 5-10 parts; pigment (titanium dioxide): 0.1 to 0.5 portion.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-3): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts of a mixture; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 50 parts of a mixture; polyvinyl chloride PVC (SG-3): 50 parts of a mixture; activated calcium carbonate: 15 parts of (1); calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of (A); pigment (titanium dioxide): 0.5 part.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-4): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts of a mixture; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 50 parts of a mixture; polyvinyl chloride PVC (SG-4): 50 parts of a mixture; activated calcium carbonate: 15 parts of (1); calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of (A); pigment (titanium dioxide): 0.5 part.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-3): 45 parts of (1); activated calcium carbonate: 8 parts of a mixture; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part.
Further, the raw materials are proportioned according to the following parts by weight: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-4): 45 parts of (1); activated calcium carbonate: 8 parts; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part.
Furthermore, the invention also comprises a production process of the PVC-UH pipe, which comprises the following steps:
the method comprises the following steps: proportioning, weighing the raw materials according to the formula proportion, and intensively putting the raw materials into a batch feeder;
step two: mixing materials, starting a high mixing pot and a low mixing pot, sequentially putting the materials in a feeding device into the high mixing pot, putting the materials into the low mixing pot when the temperature of the high mixing pot reaches 125 ℃, cooling the materials to 45 ℃ in the low mixing pot, and transferring the cooled materials into a storage bin for later use;
step three: putting the materials obtained in the second step into an extruding machine, wherein the temperature of the first section of the extruding machine is controlled to be 190-195 ℃, the temperature of the second section is controlled to be 190-185 ℃, the temperature of the third section is controlled to be 185-180 ℃, the temperature of the fourth section is controlled to be 180-175 ℃, and the temperature of the fifth section is controlled to be 175-170 ℃; the temperature of a first area of the die is controlled to be 155-160 ℃, the temperature of a second area of the die is controlled to be 160-165 ℃, the temperature of a third area of the die is controlled to be 165-170 ℃, the temperature of a fourth area of the die is controlled to be 175-180 ℃, the temperature of a fifth area of the die is controlled to be 190-195 ℃, the temperature of a buckling die base is controlled to be 190-195 ℃, the temperature of a mouth die is controlled to be 195-210 ℃, and the temperature of a core die is controlled to be 200 ℃;
step four: vacuum cooling and shaping, wherein the cooling water temperature is controlled below 35 ℃, and the vacuum degree is controlled to be 0.03-0.04 MPA;
step five: drawing and cutting at fixed length, adjusting the drawing speed and cutting at fixed length;
step six: and (4) flaring.
Furthermore, the rotating speed of a screw of the extruding machine is controlled to be 20-25 r/min.
In the invention, because the temperature has direct influence on the plasticizing degree, the high polymer material can not be melted at the temperature lower than 80 ℃ and is in a glass state, the material in the glass state is brittle and hard, and the material can not be processed in the glass state; when the temperature is increased to 160 ℃, the material is in a high elastic state, but the material cannot flow in the area, so that the material can only become soft, and the viscoelasticity is increased; in addition, for any stabilizer, when the temperature is higher than 200 ℃, the material is heated for a long time and decomposed, so when the plasticization degree is controlled, the temperature can only be controlled between 160 ℃ and 200 ℃, the material can reach the processing state of the PVC melt and has fluidity, and when the temperature of the PVC is set between 170 ℃ and 180 ℃ in the temperature range of 40 ℃, the plasticization is better.
Has the advantages that: the PVC-UH pipe is easy to extrude and shape, the production process is simple, and the cost is saved; the physical and mechanical properties are improved, the ring stress reaches 42MPA from the original 38MPA, the impact resistance is high, the water hammer resistance is effectively improved, and the toughness of the material is improved.
Drawings
FIG. 1: the invention discloses a schematic structural diagram of a die body section temperature control device and a cooling and shaping device of an extruding machine in embodiment 1.
FIG. 2: schematic structural diagram of metal hose bracket in embodiment 1 of the invention
In the figure: 1. the automatic temperature control device comprises an extruding machine, 11 parts of an automatic temperature control device, 12 parts of a core die, 13 parts of a die body section temperature control device, 14 parts of a head body, 15 parts of a high-pressure cold air metal hose, 16 parts of a hot air back-pumping metal hose, 17 parts of a high-pressure cold air machine, 18 parts of a vacuum shaping box, 19 parts of a high negative pressure air extracting device, 20 parts of a PVC-UH pipe material, 121 parts of a straight cylinder section, 122 parts of a conical section, 123 parts of an axial through hole and 124 parts of a metal hose support.
Detailed Description
The following is a detailed description of the present invention for further explanation. The invention is not limited to the claims, and all equivalent structures or equivalent processes that can be directly or indirectly applied to other related technical fields using the contents of the specification and the drawings are included in the scope of the invention.
Embodiment 1, a PVC-UH pipe, the raw material ratio is as follows by weight: PVC (SG-5): 40-50 parts; polyvinyl chloride PVC (SG-3): 40-50 parts of polyvinyl chloride (PVC) or polyvinyl chloride (SG-4): 40-50 parts; activated calcium carbonate: 5-15 parts of a solvent; calcium zinc stabilizer (307G): 4-5 parts; monoglyceride: 0.1-0.2 parts; polyethylene wax: 0.5-1 part; plastic impact resistant agents MBS, CPE, acrylates: 5-10 parts; pigment (titanium dioxide): 0.1 to 0.5 portion.
A production process of the PVC-UH pipe comprises the following steps:
the method comprises the following steps: proportioning, weighing the raw materials according to the formula proportion, and intensively putting the raw materials into a batch feeder;
step two: mixing materials, starting a high mixing pot and a low mixing pot, sequentially putting the materials in a feeding device into the high mixing pot, putting the materials into the low mixing pot when the temperature of the high mixing pot reaches 125 ℃, cooling the materials to 45 ℃ in the low mixing pot, and transferring the cooled materials into a storage bin for later use;
step three: putting the materials into an extruding machine 1, wherein the temperature of a first section of the extruding machine 1 is controlled to be 190-195 ℃, the temperature of a second section of the extruding machine 1 is controlled to be 190-185 ℃, the temperature of a third section of the extruding machine is controlled to be 185-180 ℃, the temperature of a fourth section of the extruding machine is controlled to be 180-175 ℃, and the temperature of a fifth section of the extruding machine is controlled to be 175-170 ℃; the temperature of a first area of the die is controlled to be 155-160 ℃, the temperature of a second area of the die is controlled to be 160-165 ℃, the temperature of a third area of the die is controlled to be 165-170 ℃, the temperature of a fourth area of the die is controlled to be 175-180 ℃, the temperature of a fifth area of the die is controlled to be 190-195 ℃, the temperature of a die holder is controlled to be 190-195 ℃, the temperature of a die ring is controlled to be 195-210 ℃, the temperature of a core die is controlled to be 200 ℃, and the rotating speed of a screw of an extruding machine 1 is controlled to be 20-25 revolutions per minute;
step four: vacuum cooling and shaping, wherein the cooling water temperature is controlled below 35 ℃, and the vacuum degree is controlled to be 0.03-0.04 MPA according to the pipe diameter;
step five: drawing and cutting in fixed length, adjusting the drawing speed according to the diameter of the pipe, and cutting in fixed length;
step six: and (4) flaring.
Furthermore, the rotating speed of a screw of the extruding machine is controlled to be 20-25 r/min.
Referring to fig. 1 and 2, the extruder 1 comprises an automatic temperature control device 11, and the automatic temperature control device 11 comprises an intelligent temperature control meter, a pressure spring type thermocouple, an alternating current contactor and a heating coil which are electrically connected in sequence; when the intelligent temperature control instrument is used, after the instrument is electrified, pipe forming temperature parameters are preset on the intelligent temperature control instrument, the pressure spring type thermocouple carries out temperature measurement at a sampling rate of more than 2 times/second and transmits the temperature measurement to the instrument, a display window of the instrument simultaneously displays a Set Value (SV) and a measured value (PV), signals are output to a contact of the alternating current contactor according to level signals, zero-crossing trigger silicon controlled rectifiers, analog quantity and the like, and the alternating current contactor controls the on-off of power supply and heating of the heating coil through closing, so that the measured temperature and the set temperature are balanced and consistent.
Automatic temperature regulating device 11 is including installing die body section temperature regulating device 13 on the mandrel 12 of extruding machine 1, mandrel 12 includes straight section of thick bamboo 121 and toper section 122, toper section 122 is located extruding machine 1 head body 14, straight section of thick bamboo 121 center is equipped with axial through-hole 123, die body section temperature regulating device 13 is installed on the inner wall of straight section of thick bamboo 121 of mandrel, die body section temperature regulating device 13 includes mica heating plate, thermocouple and the control of outside PLC of the interior wall mounting of straight section of thick bamboo 121 of mandrel, the high temperature resistant material of mica heating plate inner wall mounting.
The plastic extruding machine 1 further comprises a plurality of high-pressure cold air metal hoses 15 and a hot air back-pumping metal hose 16, a heat insulation layer is arranged on the wall 15 of the high-pressure cold air metal hose, the high-pressure cold air metal hoses 15 and the hot air back-pumping metal hose 16 are uniformly distributed in an axial through hole 123 in the center of the core mould straight cylinder section 121 in the circumferential direction, one end of each high-pressure cold air metal hose 15 is connected with an outlet of a high-pressure air cooler 17 mounted outside the head body 14 of the plastic extruding machine, the other end of each high-pressure cold air metal hose penetrates out of the axial through hole 123 to a vacuum shaping box 18, air outlets of the high-pressure cold air metal hoses 15 are uniformly distributed in the circumferential direction along the inner wall of the PVC-UH pipe, and the air outlet direction is perpendicular to the inner wall of the PVC-UH pipe; one end of the hot air back-pumping metal hose 16 is connected with a suction opening of a high negative pressure air draft device 19 arranged outside the extruder head body 14, and the other end of the hot air back-pumping metal hose is uniformly distributed in an axial through hole 123 in the center of the straight cylinder section in the circumferential direction; when the pipes are cooled and shaped, on one hand, the outer wall of the PVC-UH pipe 20 can be cooled and shaped through cooling water in the vacuum shaping box 18, on the other hand, cold air blown out from a high-pressure air cooler 17 is used for cooling the inner wall of the PVC-UH pipe 20 through a plurality of high-pressure cold air metal hoses 15, and hot air after heat exchange is pumped out through a hot air back-pumping metal hose 16 to achieve a better cooling effect and ensure the vacuum degree of the vacuum shaping box; the hot air pumping metal hoses 16 and the high-pressure cold air metal hoses 15 sequentially pass through the core mold tapered section 122 and the head body 14 backward, and are respectively connected with the core mold tapered section 122 and the head body 14 in a sealing manner.
A metal hose support 124 is arranged in an axial through hole 123 in the center of the straight cylinder section 121, a plurality of hot air pumping metal hoses 16 are arranged, and the high-pressure cold air metal hoses 15 can be fixedly installed through the metal hose support 124.
In the third step, the temperature of the machine body and the screw of the extruding machine can be increased, when the rotating speed of the main machine screw is normal, the feeding amount is increased, the torque is increased to improve the plasticization degree, in addition, the plasticization degree is adjusted by reducing or increasing the temperature of the confluence core, and during material mixing, a good curing period (12-48 h) is provided for dry materials.
Example 2, the raw materials are proportioned as follows in parts by weight: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-3): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts of a mixture; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part, the production process is the same as that of the embodiment 1, the pipe prepared according to the raw material proportion has excellent mechanical property, ring stress and impact resistance, the production cost is relatively low, and the processing process is difficult to control.
Example 3, the raw materials are in the following parts by weight: the raw materials are proportioned as follows by weight: PVC (SG-5): 50 parts of a mixture; polyvinyl chloride PVC (SG-3): 50 parts of a binder; activated calcium carbonate: 15 parts of (1); calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of a binder; pigment (titanium dioxide): 0.5 part, the production process is the same as that of the embodiment 1, the pipe prepared according to the raw material proportion has excellent mechanical property, ring stress and impact resistance, the production cost is relatively high, and the processing process is difficult to control.
Example 4, the raw materials are in parts by weight as follows: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-4): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part, the production process is the same as that of the embodiment 1, the mechanical property, the ring stress and the impact resistance of the pipe prepared according to the raw material proportion can meet the standard requirements, the production cost is relatively low, and the processing process is relatively easy to control.
Example 5, the raw materials are in the following parts by weight: PVC (SG-5): 50 parts of a mixture; polyvinyl chloride PVC (SG-4): 50 parts of a mixture; activated calcium carbonate: 15 parts of (1); calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of (A); pigment (titanium dioxide): 0.5 part, the production process is the same as that of the embodiment 1, the mechanical property, the ring stress and the impact resistance of the pipe prepared according to the raw material proportion can meet the standard requirements, the production cost is relatively high, and the processing process is relatively easy to control.
Example 6, the raw materials are in the following parts by weight: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-3): 45 parts of (1); activated calcium carbonate: 8 parts of a mixture; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part, the production process is the same as that of the embodiment 1, the pipe prepared according to the raw material proportion has excellent mechanical property, ring stress and impact resistance, the production cost is relatively high, and the controllability of the processing process helps to promote and control.
Example 7, further, the raw materials are mixed according to the following parts by weight: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-4): 45 parts of (1); activated calcium carbonate: 8 parts; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part, the production process is the same as that of the embodiment 1, the mechanical property, the ring stress and the impact resistance of the pipe prepared according to the raw material proportion can meet the standard requirements, the production cost is relatively low, the processing process is relatively easy to control, and the yield is obviously improved.
Claims (9)
1. The PVC-UH pipe is characterized in that the raw materials are proportioned according to the following parts by weight: the raw materials are proportioned as follows by weight: PVC (SG-5): 40-50 parts; polyvinyl chloride PVC (SG-3): 40-50 parts of polyvinyl chloride (PVC) or polyvinyl chloride (SG-4): 40-50 parts; activated calcium carbonate: 5-15 parts of a solvent; calcium zinc stabilizer (307G): 4-5 parts; monoglyceride: 0.1-0.2 parts; polyethylene wax: 0.5-1 part; plastic impact resistant agents MBS, CPE, acrylates: 5-10 parts; pigment (titanium dioxide): 0.1 to 0.5 portion.
2. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material ratio is as follows: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-3): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts of a mixture; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part.
3. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material ratio is as follows: PVC (SG-5): 50 parts of a binder; polyvinyl chloride PVC (SG-3): 50 parts of a binder; activated calcium carbonate: 15 parts of a mixture; calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of a binder; pigment (titanium dioxide): 0.5 part.
4. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material ratio is as follows: PVC (SG-5): 40 parts of a mixture; polyvinyl chloride PVC (SG-4): 40 parts of a mixture; activated calcium carbonate: 5 parts of a mixture; calcium zinc stabilizer (307G): 4 parts of a mixture; monoglyceride: 0.1 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.1 part.
5. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material ratio is as follows: PVC (SG-5): 50 parts of a mixture; polyvinyl chloride PVC (SG-4): 50 parts of a mixture; activated calcium carbonate: 15 parts of (1); calcium zinc stabilizer (307G): 5 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 1 part; plastic impact resistant agents MBS, CPE, acrylates: 10 parts of (A); pigment (titanium dioxide): 0.5 part.
6. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material proportion is as follows: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-3): 45 parts of (1); activated calcium carbonate: 8 parts of a mixture; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part.
7. The PVC-UH pipe material as recited in claim 1, characterized in that the raw material ratio is as follows: PVC (SG-5): 45 parts of (1); polyvinyl chloride PVC (SG-4): 45 parts of (1); activated calcium carbonate: 8 parts of a mixture; calcium zinc stabilizer (307G): 4.3 parts of a mixture; monoglyceride: 0.2 part; polyethylene wax: 0.5 part; plastic impact resistant agents MBS, CPE, acrylates: 5 parts of a mixture; pigment (titanium dioxide): 0.4 part.
8. A process for the production of PVC-UH pipes according to claim 1: the method is characterized by comprising the following steps:
the method comprises the following steps: proportioning, weighing the raw materials according to the formula proportion, and intensively putting the raw materials into a batch feeder;
step two: mixing materials, starting a high mixing pot and a low mixing pot, sequentially putting the materials in a feeding device into the high mixing pot, putting the materials into the low mixing pot when the temperature of the high mixing pot reaches 125 ℃, cooling the materials to 45 ℃ in the low mixing pot, and transferring the cooled materials into a storage bin for later use;
step three: putting the materials obtained in the second step into an extruding machine, wherein the temperature of the first section of the extruding machine is controlled to be 190-195 ℃, the temperature of the second section is controlled to be 190-185 ℃, the temperature of the third section is controlled to be 185-180 ℃, the temperature of the fourth section is controlled to be 180-175 ℃, and the temperature of the fifth section is controlled to be 175-170 ℃; the temperature of a first area of the die is controlled to be 155-160 ℃, the temperature of a second area of the die is controlled to be 160-165 ℃, the temperature of a third area of the die is controlled to be 165-170 ℃, the temperature of a fourth area of the die is controlled to be 175-180 ℃, the temperature of a fifth area of the die is controlled to be 190-195 ℃, the temperature of a buckling die base is controlled to be 190-195 ℃, the temperature of a mouth die is controlled to be 195-210 ℃, and the temperature of a core die is controlled to be 200 ℃;
step four: vacuum cooling and shaping, wherein the cooling water temperature is controlled below 35 ℃, and the vacuum degree is controlled to be 0.03-0.04 MPA;
step five: drawing and cutting at fixed length, adjusting the drawing speed and cutting at fixed length;
step six: and (4) flaring.
9. A process for the production of PVC-UH-pipes as claimed in claim 8, characterised in that the extruder screw speed is controlled between 20 and 25 rpm.
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| CN202011464265.9A CN114621536A (en) | 2020-12-14 | 2020-12-14 | PVC-UH pipe and production process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115232415A (en) * | 2022-07-28 | 2022-10-25 | 苏州国宇碳纤维科技有限公司 | HPVC modified material for protective tube and preparation method of HPVC cable protective tube |
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| CN115232415A (en) * | 2022-07-28 | 2022-10-25 | 苏州国宇碳纤维科技有限公司 | HPVC modified material for protective tube and preparation method of HPVC cable protective tube |
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Application publication date: 20220614 |