CN111559025A - Production process of environment-friendly cable material - Google Patents

Abstract

The invention relates to a production process of an environment-friendly cable material, which comprises the following steps: the method comprises the following steps: s1, weighing and feeding materials, namely selecting 40-60 parts of polyvinyl chloride resin, 15-20 parts of dioctyl terephthalate, 20-25 parts of calcium carbonate, 6-10 parts of calcium zinc stabilizer and 1-2 parts of PE wax; adding the materials into a mixer in batches and stirring for 1-2 h; s2, extruding and thermoplastic molding, wherein the materials are subjected to different-direction rotation mixing by two screws of a double-screw extruder at the rotating speed of 800-; s3, cutting and cooling, wherein the particles of the material hot-cut from the die surface of the single screw extruder are conveyed to the tail end by a blower, and the cut particles are cooled when the material is conveyed by the blower; s4, sieving, and separating the particles which are subjected to air blast cooling from the particles which are agglomerated together through a vibrating screen; and S5, packaging. The invention has the following advantages: the production quality and the energy production of the cable material are ensured, and the discharge amount of the waste gas of the hydrogen chloride is reduced.

Description

A kind of production process of environmental protection cable material

Technical field:

The invention relates to the field of cable material production, in particular to a production process of environmental protection cable material.

Background technique:

Wire and cable is a wire product that transmits electrical energy, information and realizes electromagnetic energy conversion. It is one of the products that must be matched when using electrical products. To realize the role of electromagnetic energy conversion, it is widely used in electrical equipment, lighting circuits, household appliances, etc., and the quality of cable materials as one of the raw materials of wire and cable is very important.

At present, in the process of producing cable material, single-screw extruding cable material or twin-screw extruding cable material is often used. Low, if the twin-screw extruder is used for extrusion, the material stays in the twin-screw extruder for a short time, the material is weakly subjected to the shear force of the twin-screw, and the extrusion granulation effect is poor. Therefore, it is necessary to carry out mixing and shearing granulation in different extruders. When the material after mixing and extruding enters the single-screw extruder, it is necessary to remove the gas in the material. There are voids, bubbles and dull surfaces on the surface or inside of the pellet products that are sheared and granulated by the machine, which also affects the physical, chemical and electrical properties of the cable material. The most commonly used method is the head of the single-screw extruder Provide vent holes. At present, the resistance at the head of the single-screw extruder is relatively large, and the plasticized material has a phenomenon of bubbling at the exhaust port, which increases the volatile content of the material, and even blocks the exhaust port of the material, which affects the production quality of the cable material;

Secondly, during the mixing process of the existing cable material in the twin-screw extruder, rapid stirring will cause the material to segregate, which will destroy the uniformity of material mixing, and the plasticizing extrusion temperature is controlled above 150 ℃, and the thermoplastic process The thermal decomposition produces a lot of waste gas (mainly ethylene and hydrogen chloride), which pollutes the environment.

Invention content:

The purpose of the present invention is to overcome the above deficiencies, provide a production process of environmental protection cable material, ensure the production quality and energy production of the cable material, and reduce the discharge of hydrogen chloride waste gas.

The object of the present invention is realized through the following technical solutions: a kind of production technology of environmental protection cable material, including:

S1, metering feed intake, choose each raw material composition of following parts by weight, polyvinyl chloride resin 40-60 parts, dioctyl terephthalate 15-20 parts, calcium carbonate 20-25 parts, calcium zinc stabilizer 6- 10 parts, PE wax 1-2 parts; put the materials into the mixer in batches and stir for 1-2h;

S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder. The specific two-stage extrusion device includes twin-screw extruder and single-screw extruder, twin-screw extruder. The angle formed between the extension direction of the extruder and the extension direction of the single-screw extruder is α. The twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the arc transition at the bending point of the bending pipe , and the bending angle of the bending tube is β, α is consistent with β and is 45°-60°, the material is mixed by the two screws of the twin-screw extruder counter-rotating and kneading, the speed is 800-900r/min, the material passes through The bending tube is transported to the single-screw extruder, and the shearing and granulation is completed by the shearing force and frictional force of the single-screw. Both the twin-screw extruder and the single-screw extruder are heated by electric heating and indirect circulating cooling. Water temperature control, plasticizing temperature is 100-150℃, circulating water volume is 1t/h;

S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported;

S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together;

S5, packaging, put the produced granules into the packaging bag to form the product.

2. The production process of an environmentally friendly cable material according to claim 1, characterized in that, in step S2, the specific two-stage extrusion device comprises a twin-screw extruder and a single-screw extruder, and the twin-screw extruder It is connected with the single-screw extruder through a bending tube;

The twin-screw extruder includes a twin-screw extruder shell and two parallel first screws disposed in the twin-screw extruder shell. A feed hopper is provided above the end of the twin-screw extruder shell away from the single-screw extruder. , the exit surface of the twin-screw extrusion shell is communicated with the bending tube, the single-screw extruder includes a single-screw extrusion shell and a second screw placed in the single-screw extrusion shell, and the first screw is far away from the bending tube One end of the second screw and one end of the second screw close to the bending tube respectively penetrate the corresponding twin-screw extrusion shell and the single-screw extrusion shell and are connected with a gear pump, and the outlet of the bending tube is placed above the second screw. ;

The outside of the single-screw extrusion shell and the twin-screw extrusion shell are sequentially provided with a heating chamber and a cooling chamber. The cooling chamber is provided with a temperature sensor, and the heating chamber is provided with a plurality of evenly distributed heating pipes. Two ends of the chamber are connected with circulating water pipes, and a circulating pump is arranged on the circulating water pipes.

A further improvement of the present invention is that: the end of the single-screw extruding shell close to the bending pipe is provided with an exhaust assembly, the exhaust assembly includes an exhaust port and a stainless steel mesh placed in the exhaust port, the stainless steel mesh is horizontally arranged, and the exhaust port There are a plurality of arc baffles arranged up and down dislocation, the opening of the arc baffle is arranged downward, and the arc baffles are placed on the lower side of the stainless steel mesh.

A further improvement of the present invention is that a liquid pouring hole is provided at the position where the arc baffle is connected to the exhaust port, and the liquid pouring hole is inclined upward toward the axis of the exhaust port.

A further improvement of the present invention is that: the material of the arc baffle is stainless steel.

A further improvement of the present invention is that both the first screw and the second screw include a rod body and a helical part, and the thickness of the helical part of the second screw gradually decreases outward from the rod body.

A further improvement of the present invention is that: in step S3, the blast is divided into two sections, each section of the air duct is 3 m long, and each section receives material through a cyclone.

Compared with the prior art, the present invention has the following advantages:

1. After the material is uniformly kneaded by the twin-screw extruder, it is conveyed to the single-screw extruder through a bending tube for shearing and granulation. The change of the flow angle of the material increases the internal friction between the materials and makes the material The gas inside is separated and extruded through a single screw. The gas is discharged through the exhaust component. The material flows to the rotating single screw with the action of gravity, which increases the shear force of the single screw on the material and effectively realizes shear granulation. , The setting of the exhaust component greatly reduces the volatile content in the material, ensures the physical and chemical properties of the cable material produced, avoids the material from the exhaust port, and increases the production capacity.

2. A gear pump is installed on the twin-screw extruder and single-screw extruder to drive the screw to rotate and reduce the resistance of the machine head, so as to effectively solve the phenomenon of material popping during the shearing and granulation process, avoid the blockage of the exhaust port, and ensure the safety of the cable material. Production quality.

3. The two screws of the twin-screw extruder are mixed with counter-rotation, and the rotation speed is 800-900r/min, so as to avoid excessive stirring and cause the material to segregate, thereby destroying the mixing uniformity and ensuring the production quality.

4. The temperature is controlled at 100-150 ℃ through electric heating and circulating cooling, and the granulation quality of the material is guaranteed at the same time of high output. After adding the stabilizer, the output of hydrogen chloride gas is less, and the stabilizer prevents the chain decomposition of polyvinyl chloride. The amount of hydrogen chloride produced in the exhaust gas at this temperature is only 1%-3%.

5. The material accumulates in the head part of the single-screw extruder, and the gear pump drives the single-screw to rotate rapidly, thereby appropriately reducing the resistance of the head, so that the material is sheared and granulated with the second screw, and part of the material is exhausted with the gas. When the material and gas are discharged from the outlet, the material and the gas hit the arc baffle of the exhaust port. The material is separated from the gas by gravity and falls to the second screw. The gas passes through multiple arc baffles and is discharged outwards. Part of the small particle material continues to flow upward with the gas. When it hits the arc baffle again and falls, the small particle material will fall to the upper end face of the arc baffle and drop from the liquid pouring hole to the second screw. The setting of the arc baffle ensures the complete separation of the gas and the material. Even in the case of material escaping, the setting of the arc baffle can still block the material and make it fall.

Description of drawings:

FIG. 1 is a schematic structural diagram of a specific two-stage extrusion device of the present invention.

FIG. 2 is a schematic structural diagram of the exhaust assembly of the present invention.

Fig. 3 is a schematic diagram of the connection between the bent pipe of the present invention and the single-screw extruder.

Labels in the figure:

1-Twin-screw extruder, 2-Single-screw extruder, 3-Bending pipe;

11-Twin-screw extrusion shell, 12-First screw, 13-Feed hopper, 14-Heating chamber, 15-Cooling chamber, 16-Temperature sensor, 17-Heating pipe, 18-Circulating water pipe, 19- circulating pump;

21-single screw extrusion shell, 22-second screw, 23-gear part, 24-exhaust assembly;

221-spiral part, 222-rod body part;

241- exhaust port, 242- stainless steel mesh, 243- arc baffle, 244- liquid pouring hole.

Detailed ways:

In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the embodiments and the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

A production process of environmental protection cable material, comprising:

S1, metering feed intake, choose each raw material composition of following parts by weight, polyvinyl chloride resin 40-60 parts, dioctyl terephthalate 15-20 parts, calcium carbonate 20-25 parts, calcium zinc stabilizer 6- 10 parts, PE wax 1-2 parts; put the materials into the mixer in batches and stir for 1-2h;

S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder. The specific two-stage extrusion device includes twin-screw extruder and single-screw extruder, twin-screw extruder. The angle formed between the extension direction of the extruder and the extension direction of the single-screw extruder is α. The twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the arc transition at the bending point of the bending pipe , and the bending angle of the bending tube is β, α is consistent with β and is 45°-60°, the material is mixed by the two screws of the twin-screw extruder counter-rotating and kneading, the speed is 800-900r/min, the material passes through The bending tube is transported to the single-screw extruder, and the shearing and granulation is completed by the shearing force and frictional force of the single-screw. Both the twin-screw extruder and the single-screw extruder are heated by electric heating and indirect circulating cooling. Water temperature control, plasticizing temperature is 100-150℃, circulating water volume is 1t/h;

S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported;

S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together;

S5, packaging, put the produced granules into the packaging bag to form the product.

In this application, after the material is uniformly kneaded by the twin-screw extruder, it is transported to the single-screw extruder for shearing and granulation through the bending tube, and the change of the flow angle of the material increases the internal friction between the materials. The gas in the material is separated and extruded through a single screw. The gas is discharged through the exhaust component. The material flows to the rotating single screw with the action of gravity, which increases the shear force of the single screw on the material and effectively realizes shearing. Granulation, the setting of the exhaust component greatly reduces the volatile content in the material, ensures the physical and chemical properties of the produced cable material, and avoids the material from the exhaust port.

Among them, the two screws of the twin-screw extruder 1 are counter-rotating and kneading, and the rotation speed is 800-900 r/min, so as to avoid excessive stirring and segregation of materials, thereby destroying the uniformity of kneading and ensuring production quality.

The temperature is controlled at 100-150 ℃ by electric heating and circulating cooling, and the granulation quality of the material is guaranteed at the same time of high output. After adding the stabilizer, the output of hydrogen chloride gas is less, and the stabilizer prevents the chain decomposition of polyvinyl chloride. At this temperature The amount of hydrogen chloride produced in the exhaust gas is only 1%-3%.

Further, in step S2, as shown in FIG. 1 , the specific two-stage extrusion device includes a twin-screw extruder 1 and a single-screw extruder 2, and between the twin-screw extruder 1 and the single-screw extruder 2 Connected by bending pipe 3;

The twin-screw extruder 1 includes a twin-screw extruder shell 11 and two parallel first screws 12 disposed in the twin-screw extruder shell 11 . There is a feeding hopper 13 above one end, the die surface of the twin-screw extruding shell 11 is communicated with the bending pipe 3, and the single-screw extruder 2 includes a single-screw extruding shell 21 and a single-screw extruding shell 21. The second screw 22 in the 21, the end of the first screw 12 away from the bending tube 3 and the end of the second screw 22 close to the bending tube 3 penetrate through the corresponding twin-screw extrusion housing 11 and the single-screw extrusion housing 21 respectively. And connected with a gear pump 23, as shown in Figure 3, the outlet of the bent pipe 3 is placed above the second screw 22;

The outside of the single-screw extrusion shell 21 and the twin-screw extrusion shell 11 are sequentially provided with a heating chamber 14 and a cooling chamber 15. The cooling chamber 15 is provided with a temperature sensor 16, and the heating chamber 14 is provided with a plurality of There are evenly distributed heating pipes 17 , two ends of the cooling chamber 15 are connected with circulating water pipes 18 , and a circulating water pipe 18 is provided with a circulating pump 19 .

In this application, a gear pump 23 is installed on the twin-screw extruder 1 and the single-screw extruder 2 to drive the screws to rotate, thereby reducing the resistance of the machine head, thereby effectively solving the phenomenon of material escaping during the shearing granulation process and avoiding the exhaust port. 241 is blocked to ensure the production quality of the cable material.

Further, the end of the single-screw extrusion shell 21 close to the bending pipe 3 is provided with an exhaust assembly 24. As shown in FIG. 2, the exhaust assembly 24 includes an exhaust port 241 and a stainless steel mesh placed in the exhaust port 241. 242, the stainless steel mesh 242 is arranged horizontally, and the exhaust port 241 is provided with a plurality of circular arc baffles 243 arranged up and down dislocation, the opening of the circular arc baffle 243 is set downward, and the arc baffles 243 are placed on the stainless steel mesh 242. lower position.

Further, a position where the arc baffle 243 is connected to the exhaust port 241 is provided with a liquid pouring hole 244 , and the liquid pouring hole 244 is inclined upward toward the axis of the exhaust port 241 .

The material accumulates in the head part of the single-screw extruder 2, and the gear pump 23 drives the second screw 22 to rotate rapidly, thereby appropriately reducing the resistance of the head, so that the material is sheared and granulated with the second screw 22, and part of the material is accompanied by the gas. The material and gas are discharged to the exhaust port 241, and the material and the gas impinge on the arc baffle 243 of the exhaust port 241. The material is separated from the gas by the action of gravity and falls to the second screw 22, and the gas passes through a plurality of arc baffles. Plate 243 and discharge outward. Once some small particle materials continue to flow upward with the gas, when they hit the arc baffle 243 again, the small particles will fall to the upper end face of the arc baffle 243 and flow through the liquid pouring hole. 244 falls on the second screw 22, the setting of the multi-layer arc baffle 243 ensures the completeness of the separation of gas and material, even in the case of material escaping, the setting of the arc baffle 243 can still block the material and remove it. bring down.

Further, the material of the arc baffle 243 is stainless steel, which prevents the material from accumulating at the exhaust port 241 and blocks the exhaust port 241 , and facilitates the material to slide down into the single-screw extruder 2 .

Further, the first screw 12 and the second screw 22 both include a rod portion 222 and a helical portion 221. The thickness of the helical portion 221 of the second screw 22 gradually decreases outward from the rod portion 222 to increase the shear force on the material.

Further, in step S3, the blast is divided into two sections, each section of air duct has a length of 3m, and each section receives materials through a cyclone.

Example 1

A production process of environmental protection cable material, comprising:

S1, metering feed intake, choose each raw material composition of following parts by weight, 40 parts of polyvinyl chloride resins, 15 parts of dioctyl terephthalate, 20 parts of calcium carbonate, 6 parts of calcium zinc stabilizers, 1 part of PE wax; Put the materials into the mixer in batches and stir for 1h;

S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder. The specific two-stage extrusion device includes twin-screw extruder and single-screw extruder, twin-screw extruder. The angle formed between the extension direction of the extruder and the extension direction of the single-screw extruder is α. The twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the arc transition at the bending point of the bending pipe , and the bending angle of the bending tube is β, α and β are the same and are 45°, the material is mixed by the two screws of the twin-screw extruder counter-rotating and mixing, the speed is 800r/min, and the material is conveyed through the bending tube to the In the single-screw extruder, shearing and granulation are completed by the shearing force and frictional force of the single-screw extruder. The melting temperature is 100℃, and the circulating water volume is 1t/h;

S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported;

S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together;

S5, packaging, put the produced granules into the packaging bag to form the product.

Example 2

A production process of environmental protection cable material, comprising:

S1, metering feed intake, choose each raw material composition of following parts by weight, 50 parts of polyvinyl chloride resins, 18 parts of dioctyl terephthalate, 22 parts of calcium carbonate, 8 parts of calcium zinc stabilizers, 2 parts of PE wax; Put the materials into the mixer in batches and stir for 1.5h;

S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder. The specific two-stage extrusion device includes twin-screw extruder and single-screw extruder, twin-screw extruder. The angle formed between the extension direction of the extruder and the extension direction of the single-screw extruder is α. The twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the arc transition at the bending point of the bending pipe , and the bending angle of the bending tube is β, α and β are consistent and are 60°, the material is mixed by the two screws of the twin-screw extruder counter-rotating and mixing, the speed is 850r/min, and the material is conveyed through the bending tube to the In the single-screw extruder, shearing and granulation are completed by the shearing force and frictional force of the single-screw extruder. The melting temperature is 120℃, and the circulating water volume is 1t/h;

S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported;

S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together;

S5, packaging, put the produced granules into the packaging bag to form the product.

Example 3

A production process of environmental protection cable material, comprising:

S1, metering feed intake, choose each raw material composition of following parts by weight, 60 parts of polyvinyl chloride resins, 20 parts of dioctyl terephthalate, 25 parts of calcium carbonate, 10 parts of calcium zinc stabilizers, 2 parts of PE wax; Put the materials into the mixer in batches and stir for 2h;

S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder. The specific two-stage extrusion device includes twin-screw extruder and single-screw extruder, twin-screw extruder. The angle formed between the extension direction of the extruder and the extension direction of the single-screw extruder is α. The twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the arc transition at the bending point of the bending pipe , and the bending angle of the bending tube is β, α is consistent with β and is 60°, the material is mixed by the two screws of the twin-screw extruder counter-rotating and mixing, the speed is 900r/min, and the material is conveyed through the bending tube to the In the single-screw extruder, shearing and granulation are completed by the shearing force and frictional force of the single-screw extruder. The melting temperature is 150℃, and the circulating water volume is 1t/h;

S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported;

S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together;

S5, packaging, put the produced granules into the packaging bag to form the product.

The tensile strength of the environmental protection cable material prepared in Example 1 of the present application is 14.5MPa, the hydrogen chloride discharge is 3%, the production capacity per hour reaches 1400Kg, and the surface of the cable material has no pores; The tensile strength is 13.8MPa, the hydrogen chloride emission is 1.8%, the production capacity per hour is 1380Kg, and the surface of the cable material has no pores; the tensile strength of the environmentally friendly cable material prepared in Example 3 is 15.2MPa, and the hydrogen chloride emission is 1%. , the production capacity per hour reaches 1500Kg, and the surface of the cable material has no pores. Therefore Example 3 is the best embodiment.

Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. a production technique of environmental protection cable material, is characterized in that, comprises: S1, metering feed intake, choose each raw material composition of following parts by weight, polyvinyl chloride resin 40-60 parts, dioctyl terephthalate 15-20 parts, calcium carbonate 20-25 parts, calcium zinc stabilizer 6- 10 parts, PE wax 1-2 parts; put the materials into the mixer in batches and stir for 1-2h; S2. Extrude thermoplastic, press the material into a specific two-stage extrusion device through a conical forced feeder, and the specific two-stage extrusion device includes a twin-screw extruder and a single-screw extruder, The angle formed between the extension direction of the twin-screw extruder and the extension direction of the single-screw extruder is α, and the twin-screw extruder and the single-screw extruder are connected by a bending pipe, and the bending The arc transitions at the bending point of the tube, and the bending angle of the bending tube is β, the α and β are consistent and are 45°-60°, and the material passes through the counter-rotating mixing of the two screws of the twin-screw extruder. The speed is 800-900r/min. The material is transported to the single-screw extruder through the bending tube, and subjected to the shearing force and friction of the single-screw to complete the shearing and granulation. The twin-screw extruder and the single-screw extruder are The temperature of the extruder is controlled by electric heating and indirect circulating cooling water, the plasticizing temperature is 100-150 °C, and the circulating water volume is 1t/h; S3. Pellet cooling, the material that is eagerly cut from the die surface of the single-screw extruder is transported to the end by the blower, and the pellets are cooled when the blower is transported; S4, sieving, the particles after blast cooling are separated by vibrating screen to separate the particles together; S5, packaging, put the produced granules into the packaging bag to form the product. 2. The production process of an environmentally friendly cable material according to claim 1, wherein in the step S2, the specific two-stage extrusion device comprises a twin-screw extruder (1) and a single-screw extruder ( 2), the twin-screw extruder (1) and the single-screw extruder (2) are connected by a bending pipe (3); The twin-screw extruder (1) comprises a twin-screw extruding shell (11) and two parallel first screws (12) disposed in the twin-screw extruding shell (11). A feeding hopper (13) is provided above the end of the exit casing (11) away from the single-screw extruder (2), and the exit surface of the twin-screw extrusion casing (11) is communicated with the bending pipe (3). , the single-screw extruder (2) comprises a single-screw extrusion shell (21) and a second screw (22) placed in the single-screw extrusion shell (21), the first screw (12) The end away from the bending tube (3) and the end of the second screw (22) close to the bending tube (3) penetrate through the corresponding twin-screw extrusion shell (11) and the single-screw extrusion shell (21) respectively and are connected There is a gear pump (23), and the outlet of the bent pipe (3) is placed above the second screw (22); A heating chamber (14) and a cooling chamber (15) are arranged on the outside of the single-screw extrusion casing (21) and the twin-screw extrusion casing (11) in sequence, and the cooling chamber (15) A temperature sensor (16) is provided, a plurality of evenly distributed heating pipes (17) are arranged in the heating chamber (14), and circulating water pipes (18) are connected to both ends of the cooling chamber (15), so The circulating water pipe (18) is provided with a circulating pump (19). 3. The production process of an environmentally friendly cable material according to claim 2, characterized in that an exhaust assembly (24) is provided at one end of the single-screw extrusion shell (21) close to the bending pipe (3), The exhaust assembly (24) includes an exhaust port (241) and a stainless steel mesh (242) placed in the exhaust port (241), the stainless steel mesh (242) is horizontally arranged, and the exhaust port (241) There are a plurality of circular arc baffles (243) arranged in upper and lower positions, the openings of the circular arc baffles (243) are arranged downward, and the circular arc baffles (243) are placed on the stainless steel mesh (242). lower position. 4. The production process of environmental protection cable material according to claim 3, characterized in that a liquid pouring hole (244) is provided at the position where the arc baffle (243) is connected with the exhaust port (241), so The liquid pouring hole (244) is inclined upward toward the axis of the exhaust port (241). 5 . The production process of an environmentally friendly cable material according to claim 3 or 4 , wherein the material of the arc baffle ( 243 ) is stainless steel. 6 . 6. The production process for an environmentally friendly cable material according to any one of claims 2 to 4, wherein the first screw (12) and the second screw (22) both comprise a rod body (222) and a helical portion (221), the thickness of the helical portion (221) of the second screw (22) gradually decreases outward from the rod body portion (222). 7. The production technique of a kind of environmental protection cable material according to claim 1, is characterized in that, in described step S3, blast is divided into two sections, and each section of air duct is 3m long, and each section receives material by cyclone.

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