阅读说明：本技术 一种高强度耐磨的pvc穿线管及其生产工艺 (High-strength wear-resistant PVC (polyvinyl chloride) threading pipe and production process thereof ) 是由 申建 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种高强度耐磨的PVC穿线管及其生产工艺,该PVC穿线管先挤出熔融制得混合料A,再挤出熔融制得混合料B,最后将混合料A和混合料B混合均匀后送至双螺杆挤出机中挤出成型制成管材；该PVC穿线管具有优异的耐磨性能和机械强度；该生产工艺通过使用挤出造粒设备制备填充母粒的原料母粒A、母粒B,以及制备填充母粒；该挤出造粒设备制备通过将原料在第一挤出仓中熔融、剪切后输送至第二挤出仓中进一步的熔融、剪切,使得原料混炼的均匀,使得生产的母粒A或者母粒B品质高,然后将高品质的母粒A、母粒B制备填充母粒,得到更高品质的填充母粒,从而使得该PVC穿线管具有高机械强度、高耐磨性能。(The invention discloses a high-strength wear-resistant PVC (polyvinyl chloride) threading pipe and a production process thereof, wherein the PVC threading pipe is extruded and melted to prepare a mixture A, then extruded and melted to prepare a mixture B, and finally, the mixture A and the mixture B are uniformly mixed and then are sent to a double-screw extruder to be extruded and molded to prepare a pipe; the PVC threading pipe has excellent wear resistance and mechanical strength; the production process comprises the steps of preparing raw material master batches A and B of filling master batches by using extrusion granulation equipment, and preparing the filling master batches; this extrusion granulation equipment preparation is through carrying further melting, shearing in the second extrusion storehouse with the raw materials after melting, shearing in first extrusion storehouse for the mixed even of raw materials, the master batch A or the master batch B quality of making production is high, then with high-quality master batch A, master batch B preparation packing master batch, obtain higher quality packing master batch, thereby make this PVC threading pipe have high mechanical strength, high wear resistance.)

1. The high-strength wear-resistant PVC threading pipe is characterized by comprising the following components in parts by weight:

50-70 parts of PVC resin, 25-35 parts of polytetrafluoroethylene, 10-20 parts of ultrahigh molecular weight polyethylene, 3-6 parts of butyl stearate, 12-18 parts of tert-butylbenzene diphenyl phosphate, 10-15 parts of diethylene glycol dibenzoate, 3-5 parts of microcrystalline paraffin, 2.5-4.5 parts of glycerol monopalmitate, 4-8 parts of hexamethyl phosphoric triamide, 2-3 parts of erythritol, 5-10 parts of nano zirconium carbide, 8-12 parts of tungsten disulfide, 10-15 parts of cast stone powder, 1.5-2.5 parts of aluminum hydroxy distearate, 1-2 parts of bisphenol A disalicylate and 16-22 parts of filling master batch;

the high-strength wear-resistant PVC threading pipe is prepared by the following steps:

the method comprises the following steps: putting PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat to 90-100 ℃ by friction, and discharging when the temperature is reduced to below 45 ℃ to obtain a mixture A;

step two: adding the rest raw materials into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat by friction to 85-95 ℃, and discharging when the temperature is reduced to below 40 ℃ to obtain a mixture B;

step three: and (3) uniformly mixing the mixture A and the mixture B, and then sending the mixture A and the mixture B into a double-screw extruder for extrusion molding to prepare the pipe.

2. The high-strength wear-resistant PVC threading pipe according to claim 1, wherein the filling master batch comprises the following components in parts by weight:

30-40 parts of sillimanite, 20-30 parts of obsidian, 15-20 parts of coal gangue, 10-15 parts of illite, 1.5-2.5 parts of ethoxy aminopropyl polydimethylsiloxane, 3-5 parts of stearic acid, 8-12 parts of trioctyl trimellitate, 5-10 parts of dioctyl phthalate, 2-3 parts of dimer linoleic acid copolymer, 2-3 parts of octyl dodecanol beeswax ester, 4-6 parts of OP wax, 25-35 parts of ethylene-propylene-styrene-acrylonitrile copolymer, 20-30 parts of ethylene-vinyl acetate copolymer and 40-50 parts of high-density polyethylene.

3. The high-strength wear-resistant PVC threading pipe according to claim 1, wherein the filling master batch is prepared by the following steps:

the method comprises the following steps: uniformly mixing sillimanite and illite, crushing, sieving with a 150-200-mesh sieve, calcining at 820-880 ℃ for 1-2 h, cooling to room temperature, adding trioctyl trimellitate and octyl dodecanol beeswax, mixing at high speed for 4-6 min, inputting into a first feed hopper (105) of an extrusion granulation device together with an ethylene-propylene-styrene-acrylonitrile copolymer, and performing melt extrusion granulation to obtain master batch A;

step two: uniformly mixing obsidian and coal gangue, crushing and sieving with a 150-200 mesh sieve, calcining at 900-950 ℃ for 1-2 h, cooling to room temperature, adding ethoxy aminopropyl polydimethylsiloxane, dioctyl phthalate and dimer linoleic acid copolymer, mixing at high speed for 3-5 min, inputting into a first feed hopper (105) of an extrusion granulation device together with ethylene-vinyl acetate copolymer, and performing melt extrusion granulation to obtain master batch B;

step three: uniformly mixing the prepared master batches A and B with high-density polyethylene, OP wax and stearic acid to obtain filling master batch raw materials, inputting the filling master batch raw materials into a first feed hopper (105) of an extrusion granulation device, feeding the filling master batch raw materials into a first extrusion bin (106), heating a heating wire on the inner wall of the first extrusion bin (106) to melt the raw materials of the filling master batches, shearing the raw materials by a first threaded rod (115), conveying the sheared raw materials into a first extrusion die head (107), extruding the melted filling master batch raw materials into a second feed hopper (108) by the first extrusion die head (107), feeding the filling master batch raw materials into a second extrusion bin (109), heating the heating wire on the inner wall of the second extrusion bin (109) to further melt the filling master batch raw materials, shearing the melted filling master batch raw materials by a second threaded rod (119), conveying the melted filling master batch raw materials into a second extrusion die head (121), and forming the melted filling master batch raw materials by a plurality of cylindrical molds (127) of the second extrusion die head (121), the stretching cylinder (125) operates to drive the cutting plate (122) to do circulating up-and-down motion, the cylindrical filling master batch raw material is cut into particles, the particles fall into the cooling water tank (104) through the discharge hole (126), and the particles are cooled by cooling water in the cooling water tank (104), so that the filling master batch is obtained.

4. The high-strength wear-resistant PVC threading pipe according to claim 3, wherein the working process of producing the filling master batch by the extrusion granulation equipment is as follows:

the method comprises the following steps: starting a first driving motor (113), wherein the first driving motor (113) drives a first main belt pulley (114) and a first auxiliary belt pulley (112) to drive a first gearbox (101) to operate so as to drive a first threaded rod (115) to rotate;

step two: the method comprises the following steps of putting raw materials for filling master batches into a first feed hopper (105), enabling the raw materials to enter a first extrusion bin (106), heating a heating wire on the inner wall of the first extrusion bin (106) to melt the raw materials, shearing the raw materials by a first threaded rod (115), and conveying the raw materials to a first extrusion die head (107);

step three: a second driving motor (117) is started, the second driving motor (117) drives a second main belt pulley (118) and a second auxiliary belt pulley (116) to drive a second gearbox (110) to operate, and therefore a second threaded rod (119) is driven to rotate;

step four: the melted raw materials are extruded into a second feed hopper (108) through a first extrusion die head (107), the raw materials enter a second extrusion bin (109), heating wires on the inner wall of the second extrusion bin (109) are heated to further melt the raw materials, and the raw materials are sheared by a second threaded rod (119) and then conveyed into a second extrusion die head (121);

step five: the melted raw materials form a cylinder shape through a plurality of plastic holes (127) of the second extrusion die head (121), the stretching cylinder (125) is started, the stretching cylinder (125) operates to drive the cutting plate (122) to do circular up-and-down motion through the movable rod, and the cylindrical raw materials are cut into particles;

step six: the granular raw material falls into the cooling water tank (104) through the discharge port (126), and is cooled by the cooling water in the cooling water tank (104), thereby obtaining the filled master batch.

5. The PVC threading pipe with high strength and wear resistance as claimed in claim 1, wherein the production process of the master batch A and the master batch B is the same as that of the filling master batch.

6. A production process of a high-strength wear-resistant PVC threading pipe is characterized by comprising the following steps:

the method comprises the following steps: putting PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat to 90-100 ℃ by friction, and discharging when the temperature is reduced to below 45 ℃ to obtain a mixture A;

step two: adding the rest raw materials into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat by friction to 85-95 ℃, and discharging when the temperature is reduced to below 40 ℃ to obtain a mixture B;

step three: and (3) uniformly mixing the mixture A and the mixture B, and then sending the mixture A and the mixture B into a double-screw extruder for extrusion molding to prepare the pipe.

Technical Field

The invention relates to the technical field of threading pipe production, in particular to a high-strength wear-resistant PVC threading pipe and a production process thereof.

Background

With the rapid development of urban construction in China, a large number of farmers transfer from rural areas to urban areas for living, in order to meet the requirements of people who transfer to urban areas for living on materials and spiritual culture, a plurality of public gathering places need to be constructed in a matched manner, power supply lines in the public gathering places are exposed and concealed, exposed lines are mainly laid on ceilings and floors, but more combustible and combustible materials exist in ceilings and floors, so that the lines in the public gathering places need to be protected by using threading pipes, otherwise, fire disasters are caused by short circuit caused by aging of the lines and the like, and great loss is caused to the life and property safety of people.

Patent application No. CN201711043843.X discloses a PVC threading pipe and a preparation method thereof. The PVC threading pipe is prepared from the following raw materials: the threading pipe has the advantages of high flame retardance and high compression resistance, and also has the characteristics of good bending property, low-temperature impact resistance and the like. The following disadvantages still exist: (1) the PVC threading pipe has poor wear resistance and is easy to be damaged by friction during installation; (2) the mixing number of times is few in this PVC threading pipe production process, and mixing effect is poor, and the PVC threading pipe quality that obtains is not high.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a high-strength wear-resistant PVC threading pipe and a production process thereof: (1) the PVC threading pipe is characterized in that a mixture A is prepared from PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol, a mixture B is prepared from polytetrafluoroethylene, ultrahigh molecular weight polyethylene, tert-butyl diphenyl phosphate, microcrystalline paraffin, tungsten disulfide, aluminum hydroxy distearate and bisphenol A disalicylate, and the mixture A and the mixture B are uniformly mixed and then are sent to a double-screw extruder to be extruded and molded to prepare the pipe, so that the problems that the existing PVC threading pipe is poor in wear resistance and easy to be damaged due to friction during installation are solved; (2) the raw materials are put into a first feed hopper, the raw materials enter a first extrusion bin, a heating wire on the inner wall of the first extrusion bin is heated to melt the raw materials, and after the raw materials are sheared by a first threaded rod, conveying the raw materials to a first extrusion die head, extruding the molten raw materials into a second feed hopper through the first extrusion die head, feeding the raw materials into a second extrusion bin, heating a heating wire on the inner wall of the second extrusion bin to further melt the raw materials, shearing the raw materials by a second threaded rod, conveying the mixture into a second extrusion die head, forming a cylindrical molten raw material by a plurality of shaping holes of the second extrusion die head, through tensile cylinder operation through the movable rod drive cutting board make circulation up-and-down motion, cut cylindric raw materials into graininess, it is few to have solved mixed number of times in the current PVC threading pipe production process, and mixing effect is poor, the not high problem of PVC threading pipe quality that obtains.

The purpose of the invention can be realized by the following technical scheme:

a high-strength wear-resistant PVC threading pipe comprises the following components in parts by weight:

50-70 parts of PVC resin, 25-35 parts of polytetrafluoroethylene, 10-20 parts of ultrahigh molecular weight polyethylene, 3-6 parts of butyl stearate, 12-18 parts of tert-butylbenzene diphenyl phosphate, 10-15 parts of diethylene glycol dibenzoate, 3-5 parts of microcrystalline paraffin, 2.5-4.5 parts of glycerol monopalmitate, 4-8 parts of hexamethyl phosphoric triamide, 2-3 parts of erythritol, 5-10 parts of nano zirconium carbide, 8-12 parts of tungsten disulfide, 10-15 parts of cast stone powder, 1.5-2.5 parts of aluminum hydroxy distearate, 1-2 parts of bisphenol A disalicylate and 16-22 parts of filling master batch;

the high-strength wear-resistant PVC threading pipe is prepared by the following steps:

the method comprises the following steps: putting PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat to 90-100 ℃ by friction, and discharging when the temperature is reduced to below 45 ℃ to obtain a mixture A;

step two: adding the rest raw materials into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat by friction to 85-95 ℃, and discharging when the temperature is reduced to below 40 ℃ to obtain a mixture B;

step three: and (3) uniformly mixing the mixture A and the mixture B, and then sending the mixture A and the mixture B into a double-screw extruder for extrusion molding to prepare the pipe.

As a further scheme of the invention: the filling master batch comprises the following components in parts by weight:

30-40 parts of sillimanite, 20-30 parts of obsidian, 15-20 parts of coal gangue, 10-15 parts of illite, 1.5-2.5 parts of ethoxy aminopropyl polydimethylsiloxane, 3-5 parts of stearic acid, 8-12 parts of trioctyl trimellitate, 5-10 parts of dioctyl phthalate, 2-3 parts of dimer linoleic acid copolymer, 2-3 parts of octyl dodecanol beeswax ester, 4-6 parts of OP wax, 25-35 parts of ethylene-propylene-styrene-acrylonitrile copolymer, 20-30 parts of ethylene-vinyl acetate copolymer and 40-50 parts of high-density polyethylene.

As a further scheme of the invention: the filling master batch is prepared by the following steps:

the method comprises the following steps: uniformly mixing sillimanite and illite, crushing, sieving with a 150-200-mesh sieve, calcining at 820-880 ℃ for 1-2 h, cooling to room temperature, adding trioctyl trimellitate and octyl dodecanol beeswax, mixing at a high speed for 4-6 min, inputting into a first feed hopper of an extrusion granulation device together with an ethylene-propylene-styrene-acrylonitrile copolymer, and performing melt extrusion granulation to obtain master batch A;

step two: uniformly mixing obsidian and coal gangue, crushing and sieving with a 150-200 mesh sieve, calcining at 900-950 ℃ for 1-2 h, cooling to room temperature, adding ethoxy aminopropyl polydimethylsiloxane, dioctyl phthalate and dimer linoleic acid copolymer, mixing at high speed for 3-5 min, inputting into a first feed hopper of an extrusion granulation device together with ethylene-vinyl acetate copolymer, and performing melt extrusion granulation to obtain master batch B;

step three: uniformly mixing the prepared master batches A and B with high-density polyethylene, OP wax and stearic acid to obtain filling master batch raw materials, inputting the filling master batch raw materials into a first feed hopper of an extrusion granulation device, feeding the filling master batch raw materials into a first extrusion bin, heating a heating wire on the inner wall of the first extrusion bin to melt the raw materials of the filling master batches, shearing the raw materials by a first threaded rod, conveying the raw materials into a first extrusion die head, extruding the melted filling master batch raw materials into a second feed hopper by the first extrusion die head, feeding the filling master batch raw materials into a second extrusion bin, heating the heating wire on the inner wall of the second extrusion bin to further melt the filling master batch raw materials, shearing the melted filling master batch raw materials by a second threaded rod, conveying the raw materials into a second extrusion die head, forming a plurality of shaping cylindrical holes by a second extrusion die head, and driving a cutting plate to circularly move up and down by the operation of a stretching cylinder, cutting the cylindrical filling master batch raw material into granules, enabling the granular filling master batch raw material to fall into a cooling water tank through a discharge port, and cooling by cooling water in the cooling water tank to obtain the filling master batch.

As a further scheme of the invention: the working process of the extrusion granulation equipment for producing the filling master batches is as follows:

the method comprises the following steps: starting a first driving motor, wherein the first driving motor drives a first main belt pulley and a first auxiliary belt pulley to drive a first gearbox to operate so as to drive a first threaded rod to rotate;

step two: the method comprises the following steps of putting raw materials for filling master batches into a first feed hopper, feeding the raw materials into a first extrusion bin, heating a heating wire on the inner wall of the first extrusion bin to melt the raw materials, shearing the raw materials by a first threaded rod, and conveying the raw materials into a first extrusion die head;

step three: a second driving motor is started, and the second driving motor drives a second main belt pulley and a second auxiliary belt pulley to drive a second gearbox to operate so as to drive a second threaded rod to rotate;

step four: extruding the molten raw materials into a second feed hopper through a first extrusion die head, feeding the raw materials into a second extrusion bin, heating a heating wire on the inner wall of the second extrusion bin to further melt the raw materials, shearing the raw materials by a second threaded rod, and conveying the raw materials into a second extrusion die head;

step five: the melted raw materials form a cylinder shape through a plurality of shaping holes of the second extrusion die head, a stretching cylinder is started, the stretching cylinder operates to drive a cutting plate to circularly move up and down through a movable rod, and the cylinder-shaped raw materials are cut into particles;

step six: the granular raw materials fall into a cooling water tank through a discharge port, and are cooled by cooling water in the cooling water tank to obtain the filling master batch.

As a further scheme of the invention: the production process of the master batch A and the master batch B is the same as that of the filling master batch.

As a further scheme of the invention: a production process of a high-strength wear-resistant PVC threading pipe comprises the following steps:

the method comprises the following steps: putting PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat to 90-100 ℃ by friction, and discharging when the temperature is reduced to below 45 ℃ to obtain a mixture A;

step two: adding the rest raw materials into a kneader for kneading, discharging the materials into a cold mixer for cooling when the materials generate heat by friction to 85-95 ℃, and discharging when the temperature is reduced to below 40 ℃ to obtain a mixture B;

step three: and (3) uniformly mixing the mixture A and the mixture B, and then sending the mixture A and the mixture B into a double-screw extruder for extrusion molding to prepare the pipe.

The invention has the beneficial effects that:

(1) the production process of the high-strength wear-resistant PVC threading pipe comprises the steps of preparing a mixture A from PVC resin, butyl stearate, diethylene glycol dibenzoate, monopalmitin, hexamethylphosphoric triamide, nano zirconium carbide, cast stone powder, filling master batches and erythritol, preparing a mixture B from polytetrafluoroethylene, ultrahigh molecular weight polyethylene, tert-butyl diphenyl phosphate, microcrystalline paraffin, tungsten disulfide, aluminum hydroxy distearate and bisphenol A disalicylate, uniformly mixing the mixture A and the mixture B, and then sending the mixture A and the mixture B to a double-screw extruder for extrusion molding to prepare a pipe; the PVC threading pipe has excellent wear resistance, good safety coefficient, excellent mechanical strength, aging resistance, chemical corrosion resistance and heat resistance, can avoid friction damage caused by laying and mounting of the pipe, greatly prolongs the service life of the PVC pipe, increases the application field of products and has wide application prospect;

detect the performance of this wear-resisting PVC threading pipe of high strength, the testing result: the tensile strength is 51-63MPa, the bending strength is 64-86MPa, and the ring stiffness is 60-75kN/m²The abrasion loss is 0.49-0.61 g;

(2) according to the production process of the high-strength wear-resistant PVC threading pipe, disclosed by the invention, the raw material master batches A and B of the filling master batches and the filling master batches are prepared by using the extrusion granulation equipment, wherein the filling master batches are important raw materials for improving the wear resistance and the mechanical strength of the PVC threading pipe;

the first screw rod is driven to rotate by driving a first main belt pulley and a first auxiliary belt pulley through the operation of a first driving motor, the raw material is put into a first feed hopper, the raw material enters a first extrusion bin, a heating wire on the inner wall of the first extrusion bin is heated to melt the raw material, the raw material is conveyed into a first extrusion die head after being sheared by the first screw rod, the raw material enters a second extrusion bin by driving a second main belt pulley and a second auxiliary belt pulley to drive a second gearbox to rotate through the operation of a second driving motor, the melted raw material is extruded into a second feed hopper through the first extrusion die head, the raw material enters the second extrusion bin, the heating wire on the inner wall of the second extrusion bin is heated to further melt the raw material, the raw material is conveyed into a second extrusion die head after being sheared by the second screw rod, the melted raw material passes through a plurality of holes of the second extrusion die head to form a shaping cylinder, starting a stretching cylinder, driving a cutting plate to circularly move up and down through a movable rod by the operation of the stretching cylinder, cutting the cylindrical raw material into particles, enabling the particles of the raw material to fall into a cooling water tank through a discharge port, and cooling the particles of the raw material by cooling water in the cooling water tank to obtain master batches A and B or filling master batches; this extrusion granulation equipment preparation is through carrying further melting, shearing in the second extrusion storehouse with the raw materials after melting, shearing in first extrusion storehouse for the mixed even of raw materials, the master batch A or the master batch B quality of making production is high, then with high-quality master batch A, master batch B preparation packing master batch, obtain higher quality packing master batch, thereby make this PVC threading pipe have high mechanical strength, high wear resistance.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of an extrusion granulation apparatus according to the present invention;

FIG. 2 is a schematic view showing the internal structure of the first extrusion chamber according to the present invention;

FIG. 3 is a schematic view showing the internal structure of a second extrusion chamber according to the present invention;

FIG. 4 is an enlarged schematic view taken at A of FIG. 1 in accordance with the present invention;

fig. 5 is a bottom view of a second extrusion die of the present invention.

In the figure: 101. a first gearbox; 102. a first support base; 103. a load-bearing base; 104. a cooling water tank; 105. a first feed hopper; 106. a first extrusion chamber; 107. a first extrusion die; 108. a second feed hopper; 109. a second extrusion chamber; 110. a second gearbox; 111. a second support base; 112. a first secondary pulley; 113. a first drive motor; 114. a first primary pulley; 115. a first threaded rod; 116. a second secondary pulley; 117. a second drive motor; 118. a second primary pulley; 119. a second threaded rod; 120. a granulating mechanism; 121. a second extrusion die; 122. cutting the board; 123. a support pillar; 124. mounting a plate; 125. stretching the cylinder; 126. a discharge port; 127. and (4) forming a hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.