CN112895383A - Grating pipe processing technology - Google Patents

Abstract

The invention discloses a grid pipe processing technology which comprises the steps of raw material and equipment inspection, extruder temperature rise and heat preservation, extrusion speed acceleration, cooling and shaping, cutting, detection and crushing, packaging and warehousing, and machine halt and cleaning.

Description

Grating pipe processing technology

Technical Field

The invention relates to the field of communication pipe processing, in particular to a grille pipe processing technology and a grille pipe processing technology.

Background

The grid pipe is a common hard plastic pipe, is formed by melting and extruding polyvinyl chloride resin, is mainly used for a communication cable sheath pipe, has strong pressure resistance, corrosion resistance and excellent water-closing performance, and is widely applied, so that a production and processing process of the high-quality grid pipe with scientific program and accurate connection is needed.

Disclosure of Invention

Aiming at the problems in the background art, the invention aims to provide a grating pipe processing technology and a processing technology, which effectively solve the problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a grating pipe processing technology comprises the following steps:

checking whether a PVC raw material label, the pressure grade of a machine head of an extruder, an opening die, a core rod, a half block, a vacuum shaping box and a sealing washer on a cooling water tank conform to production requirements or not;

step two, polishing the end face and the flow channel of the neck ring with 400-sand-paper 600 meshes of sand paper before mounting the neck ring, determining that the inner heating ring is normal, polishing the neck ring completely with 1000-sand-paper 1200 meshes of sand paper, mounting the neck ring, screwing each screw diagonally during mounting the neck ring and adjusting the gap between the neck ring to ensure the tightness of each screw to be consistent, uniformly screwing the neck ring once before starting the extruder to prevent leakage, and keeping the temperature of the neck ring without the inner heating ring within 30 minutes after mounting the neck ring;

checking whether the water, electricity and gas supply is normal, whether phenomena such as running, overflowing, dripping, leaking and blocking exist or not, processing in time, checking whether all emergency stop buttons are reset or not and whether potentiometers return to zero or not, then switching on a power supply of a main control box of the extruder, checking whether a control panel of the extruder prompts a fault alarm signal or not, and if the control panel displays the fault alarm signal, processing according to the fault alarm signal displayed by the control panel;

opening a cooling water circulation pipeline of the cooling water tank, checking whether a spray head in the cooling water tank is blocked, whether the water outlet direction of the spray head is correct and whether the water pressure meets obvious and unsatisfactory requirements, and timely processing if the water pressure is abnormal;

checking whether the operation of the hot mixer is normal, checking whether the operation of a temperature control meter, a thermocouple, a cooling fan, an oil pump, a cutting machine, a tractor, a pipe turnover frame, a limit switch, a dust collection device, a charging barrel and heaters in all areas of the machine head are normal, wherein the cutting machine is a planetary cutting machine;

sixthly, adjusting the positions of a saw blade and a riding wheel of the cutting machine, the feed depth, the feed speed and the revolution speed according to the specification of a product required by production, adjusting the heights of the riding wheels in a traction pipe and a water tank, ensuring that the center height of the production line is adjusted on a horizontal line, and preventing the pipe from being bent;

step seven, setting code spraying content of the code spraying machine according to production requirements and then waiting;

step eight, heating the extruder, raising the temperature of the neck ring to 140 ℃ for 130-;

section 1 of the barrel	190-200℃	Head 1 area	180-190℃	Speed of main engine	600-700
						Barrel 2 zone	170-185℃	Region 2 of machine head	190-200℃	Traction rotational speed	200-400
Barrel 3 zone	150-165℃	Region 3 of machine head	180-190℃	Rotational speed of feed	500-700
						Section 4 of the barrel	150-165℃
Confluence core	170-175℃

Step nine, adding the raw materials into a thermal mixer for thermal mixing treatment, wherein the thermal mixing temperature is 120-130 ℃, stirring for 30min to uniformly mix the materials, and feeding the mixture into a charging barrel;

step ten, starting a main motor of the extruder, enabling a screw to run at 6-10r/min, increasing the rotating speed until the mouth mold discharges materials, wherein the rotating speed increasing standard is 3-5 r/min until the rotating speed of the screw is increased to 25-35r/min, cleaning the extruded materials after the mouth mold discharges materials, adjusting the mouth mold gap once after the materials are completely plasticized to enable the materials to be uniformly discharged, wrapping the discharged materials on a tractor, starting the tractor to start to drag, and enabling the speed of the tractor to be consistent with the delivery speed of the tube blank in the dragging process;

step eleven, opening a vacuum pump of the vacuum shaping box, controlling the vacuum pressure to be 0.02-0.06 Mpa, attaching the outer wall of the tube blank to the inner wall to form the shape of the tube blank, adjusting the position and the water level of the vacuum shaping box according to the forming condition of the tube blank to fully cool and shape the tube blank, and then adjusting the water pressure to keep the water level of the vacuum shaping box at the position (taking the pointer of the water pressure gauge as the standard for not jumping);

step twelve, after the pipe is basically formed, adjusting the gap of the neck ring mold again, adjusting the rotating speed of the screw rod, the traction speed and the heating temperature of each part of the extruder according to the conditions of the inner wall and the outer wall of the pipe until the product reaches the quality requirement and the maximum production speed, at the moment, continuously sending the pipe blank out of the extruder and forming under the action of a vacuum forming box and a cooling water tank, cutting the formed pipe by a cutting machine to obtain a pipe section meeting the requirement, and sucking sawdust of the collected pipe by a dust suction device to keep the production line and the workshop clean;

and step thirteen, after being checked to be qualified by an inspector, the pipe sections are sent to an ink-jet printer to be printed with product codes and then packaged and put in storage, and the defective products screened out by the inspector are sent to a crushing room to be crushed and recycled as raw materials.

Further, the heat preservation temperature of the neck mold is 130-140 ℃.

Further, the temperature of cooling water in the cooling water tank is 10-20 ℃.

Further, the grid pipe processing technology further comprises a shutdown process, wherein the shutdown process comprises the following steps:

when the production task of the pipe is finished and needs to be shut down, informing a material mixing worker at a hot mixer of the shut-down time in advance and controlling the adding amount of raw materials, decelerating a screw of an extruder to 0 at a speed of 2-5r/min during the shut-down, stopping the screw of the extruder, and then stopping a vacuum pump, a cooling water circulation pipeline, a tractor, a cutting machine and an ink-jet printer in sequence, wherein no excess material exists in the screw after the screw of the extruder stops rotating;

step two, detaching the neck ring, cleaning up the residual materials in the die by using a cleaning tool, polishing the end part and the flow channel of the neck ring by using 300-plus 600-mesh sand paper, coating antirust oil and storing the antirust oil in a specified area;

step three, all potentiometers are adjusted to be zero, and a water source, an air source and a power supply are cut off;

step four, cleaning a dust suction device, bagging and conveying the sawdust to a crushing room to be used as a raw material;

and fifthly, cleaning the ground and the working site, keeping the ground and the equipment clean, and putting the tools and the articles orderly.

Furthermore, the sand paper is metallographic sand paper.

Further, the tool is a copper bar or a copper brazing rod.

The invention has the following beneficial technical effects:

the invention scientifically and comprehensively presents the production and processing process of the grid pipe, the steps are mutually connected and accurately matched, and compared with the prior art, the invention effectively ensures the finished product quality and the production efficiency of the grid pipe and has outstanding progress.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

The grating pipe processing technology comprises the following steps:

checking whether a PVC raw material label, the pressure grade of a machine head of an extruder, an opening die, a core rod, a half block, a vacuum shaping box and a sealing washer on a cooling water tank conform to production requirements or not;

secondly, polishing the end face and the runner of the port mould by using 400-mesh metallographic abrasive paper before the port mould is installed, determining that the inner heating ring is normal, polishing the port mould by using 1000-mesh metallographic abrasive paper, installing the port mould, screwing each screw diagonally during the installation of the port mould, adjusting the gap between the port mould, ensuring the tightness of each screw to be consistent, uniformly screwing each screw once before the extruder is started, preventing leakage, and preserving heat of the port mould without the inner heating ring within 30 minutes after the port mould is installed;

checking whether the water, electricity and gas supply is normal, whether phenomena such as running, overflowing, dripping, leaking and blocking exist or not, processing in time, checking whether all emergency stop buttons are reset or not and whether potentiometers return to zero or not, then switching on a power supply of a main control box of the extruder, checking whether a control panel of the extruder prompts a fault alarm signal or not, and if the control panel displays the fault alarm signal, processing according to the fault alarm signal displayed by the control panel;

opening a cooling water circulation pipeline of the cooling water tank, checking whether a spray head in the cooling water tank is blocked, whether the water outlet direction of the spray head is correct and whether the water pressure meets obvious and unsatisfactory requirements, and if abnormal conditions exist, timely processing, wherein the temperature of cooling water in the cooling water tank is 10-20 ℃;

checking whether the operation of the hot mixer is normal, checking whether the operation of a temperature control meter, a thermocouple, a cooling fan, an oil pump, a cutting machine, a tractor, a pipe turnover frame, a limit switch, a dust collection device, a charging barrel and heaters in all areas of the machine head are normal, wherein the tractor is a crawler-type tractor;

adjusting the positions of a saw blade and a riding wheel of the cutting machine, the feed depth, the feed speed and the revolution speed according to the product specification required by production, adjusting the heights of the riding wheel in a traction pipe and a water tank, ensuring that the center height of the production line is adjusted on a horizontal line, preventing the pipe from bending, and preventing a riding wheel frame and a sizing sleeve from being damaged when the traction pipe is penetrated;

step seven, setting code spraying content of an ink-jet printer according to production requirements and then waiting, wherein the ink-jet printer is an ink-jet printer;

step eight, heating the extruder, raising the temperature of the neck ring to 130 ℃, then heating the temperature of other parts of the extruder to 145 ℃, keeping the temperature for 30-70 minutes after reaching the temperature, specifically keeping the temperature for 30-50 minutes in summer and keeping the temperature for 50-70 minutes in winter, and setting the temperature of each area (+ -10 ℃) and the host machine, the traction rotating speed and the feeding speed (+ -10 RPM) according to the following table after the heat preservation time is up;

section 1 of the barrel	190℃	Head 1 area	180℃	Speed of main engine	600
						Barrel 2 zone	170℃	Region 2 of machine head	190℃	Traction rotational speed	200
Barrel 3 zone	150℃	Region 3 of machine head	180℃	Rotational speed of feed	500
						Section 4 of the barrel	150℃
Confluence core	170℃

Step nine, adding the raw materials into a hot mixer for hot mixing treatment, wherein the raw materials comprise PVC resin raw materials and plastic additives such as calcium carbonate, light stabilizer, heat stabilizer, PE wax, paraffin, stearic acid, chlorinated polyethylene, acrylate modifier, dioctyl ester, whitening agent and the like, the hot mixing temperature is 120-130 ℃, stirring is carried out for 30min, the materials are uniformly mixed, and the mixture is fed into a charging barrel;

step ten, starting a main motor of the extruder, enabling a screw to run at 6r/min, increasing the rotating speed until the mouth mold discharges materials, wherein the rotating speed increasing standard is 3r/min, until the rotating speed of the screw is increased to 27r/min, cleaning the extruded materials after the mouth mold discharges materials, adjusting the mouth mold gap once again after the materials are completely plasticized to enable the materials to be uniformly discharged, wrapping the discharged materials on a tractor, starting the tractor to start traction, and enabling the speed of the tractor to be consistent with the delivery speed of the pipe blank in the traction process;

step eleven, opening a vacuum pump of the vacuum shaping box, controlling the vacuum pressure to be 0.02Mpa, attaching the outer wall of the tube blank to the inner wall to form the shape of the tube blank, adjusting the position and the water level of the vacuum shaping box according to the forming condition of the tube blank to fully cool and shape the tube blank, and then adjusting the water pressure to keep the water level of the vacuum shaping box at the position (taking the condition that a pointer of a water pressure gauge does not bounce as the standard);

step twelve, after the pipe is basically formed, adjusting the gap of the neck ring mold again, adjusting the rotating speed of the screw rod, the traction speed and the heating temperature of each part of the extruder according to the conditions of the inner wall and the outer wall of the pipe until the product reaches the quality requirement and the maximum production speed, at the moment, continuously sending the pipe blank out of the extruder and forming under the action of a vacuum forming box and a cooling water tank, cutting the formed pipe by a cutting machine to obtain a pipe section meeting the requirement, and sucking sawdust of the collected pipe by a dust suction device to keep the production line and the workshop clean;

step thirteen, after the pipe sections are inspected to be qualified by an inspector, the pipe sections are sent to an ink jet printer to be printed with product marks and then packaged and put in storage, and the defective products screened out by the inspector are sent to a crushing room to be crushed and recycled as raw materials.

The grid pipe processing technology further comprises a shutdown process, wherein the shutdown process comprises the following steps:

when the production task of the pipe is finished and needs to be shut down, informing a material mixing worker at a hot mixer of the shut-down time in advance and controlling the adding amount of raw materials, decelerating a screw of an extruder to 0 at a speed of 3r/min during the shut-down, stopping the screw of the extruder, and then stopping a vacuum pump, a cooling water circulation pipeline, a tractor, a cutting machine and an ink-jet printer in sequence, wherein no residual materials are required to be stored in the screw after the screw of the extruder stops rotating;

step two, detaching the neck ring mold, cleaning up the residual materials in the mold by using a cleaning tool such as a copper bar or a copper drill rod, polishing the end part and the flow channel of the neck ring mold by using 300-mesh metallographic abrasive paper, coating antirust oil and storing the antirust oil in a specified area;

step three, all potentiometers are adjusted to be zero, and a water source, an air source and a power supply are cut off;

step four, cleaning a dust suction device, bagging and conveying the sawdust to a crushing room to be used as a raw material;

and fifthly, cleaning the ground and the working site, keeping the ground and the equipment clean, and putting the tools and the articles orderly.

Example two

The grating pipe processing technology comprises the following steps:

checking whether a PVC raw material label, the pressure grade of a machine head of an extruder, an opening die, a core rod, a half block, a vacuum shaping box and a sealing washer on a cooling water tank conform to production requirements or not;

secondly, polishing the end face and the runner of the port mould by using 500-mesh metallographic abrasive paper before installing the port mould, determining that the inner heating ring is normal, polishing the port mould by using 1200-mesh metallographic abrasive paper after the port mould is installed, installing the port mould, screwing the screws diagonally during installing the port mould, adjusting the gap between the port mould, ensuring the tightness of the screws to be consistent, uniformly screwing the screws once before starting the extruder, preventing leakage, and preserving heat of the port mould without the inner heating ring within 30 minutes after the port mould is installed;

checking whether the water, electricity and gas supply is normal, whether phenomena such as running, overflowing, dripping, leaking and blocking exist or not, processing in time, checking whether all emergency stop buttons are reset or not and whether potentiometers return to zero or not, then switching on a power supply of a main control box of the extruder, checking whether a control panel of the extruder prompts a fault alarm signal or not, and if the control panel displays the fault alarm signal, processing according to the fault alarm signal displayed by the control panel;

opening a cooling water circulation pipeline of the cooling water tank, checking whether a spray head in the cooling water tank is blocked, whether the water outlet direction of the spray head is correct and whether the water pressure meets obvious and unsatisfactory requirements, and timely processing if the water pressure is abnormal;

checking whether the operation of the hot mixer is normal, checking whether the operation of a temperature control meter, a thermocouple, a cooling fan, an oil pump, a cutting machine, a tractor, a pipe turnover frame, a limit switch, a dust collection device, a charging barrel and heaters in all areas of the machine head are normal, wherein the tractor is a crawler-type tractor;

sixthly, adjusting the positions of a saw blade and a riding wheel of the cutting machine, the feed depth, the feed speed and the revolution speed according to the specification of a product required by production, adjusting the heights of the riding wheels in a traction pipe and a water tank, ensuring that the center height of the production line is adjusted on a horizontal line, and preventing the pipe from being bent;

step seven, setting code spraying content of an ink-jet printer according to production requirements and then waiting, wherein the ink-jet printer is an ink-jet printer;

step eight, heating the extruder, raising the temperature of the neck ring to 135 ℃, then heating the other parts of the extruder to 155 ℃, keeping the temperature for 30-70 minutes after reaching the temperature, specifically keeping the temperature for 30-50 minutes in summer and keeping the temperature for 50-70 minutes in winter, and setting the temperature of each area (+ -10 ℃) and the host machine, the traction rotating speed and the feeding speed (+ -10 RPM) according to the following table after the heat preservation time is up;

section 1 of the barrel	195℃	Head 1 area	185℃	Speed of main engine	650
						Barrel 2 zone	180℃	Region 2 of machine head	195℃	Traction rotational speed	300
Barrel 3 zone	160℃	Region 3 of machine head	185℃	Rotational speed of feed	600
						Section 4 of the barrel	160℃
Confluence core	172℃

Step nine, adding the raw materials into a hot mixer for hot mixing treatment, wherein the raw materials comprise a PVC resin raw material and plastic auxiliaries such as calcium carbonate, a light stabilizer, a heat stabilizer, PE wax, paraffin, stearic acid, chlorinated polyethylene, an acrylate modifier, dioctyl ester, a whitening agent and the like, stirring for 30min at the hot mixing temperature of 125 ℃, uniformly mixing the materials, and feeding the mixture into a charging barrel;

step ten, starting a main motor of the extruder, enabling a screw to run at 8r/min, increasing the rotating speed until the mouth mold discharges materials, wherein the rotating speed increasing standard is 4r/min, until the rotating speed of the screw is increased to 28r/min, cleaning the extruded materials after the mouth mold discharges materials, adjusting the mouth mold gap once again after the materials are completely plasticized to enable the materials to be uniformly discharged, wrapping the discharged materials on a tractor, starting the tractor to start traction, and enabling the speed of the tractor to be consistent with the delivery speed of the pipe blank in the traction process;

step eleven, opening a vacuum pump of the vacuum shaping box, controlling the vacuum pressure to be 0.04Mpa, attaching the outer wall of the tube blank to the inner wall to form the shape of the tube blank, adjusting the position and the water level of the vacuum shaping box according to the forming condition of the tube blank to fully cool and shape the tube blank, then adjusting the water pressure to keep the water level of the vacuum shaping box at the position (taking the condition that a pointer of a water pressure gauge does not bounce as the criterion), and controlling the temperature of cooling water in a cooling water tank to be 10-20 ℃;

step twelve, after the pipe is basically formed, adjusting the gap of the neck ring mold again, adjusting the rotating speed of the screw rod, the traction speed and the heating temperature of each part of the extruder according to the conditions of the inner wall and the outer wall of the pipe until the product reaches the quality requirement and the maximum production speed, at the moment, continuously sending the pipe blank out of the extruder and forming under the action of a vacuum forming box and a cooling water tank, cutting the formed pipe by a cutting machine to obtain a pipe section meeting the requirement, and sucking sawdust of the collected pipe by a dust suction device to keep the production line and the workshop clean;

step thirteen, after the pipe sections are inspected to be qualified by an inspector, the pipe sections are sent to an ink jet printer to be printed with product marks and then packaged and put in storage, and the defective products screened out by the inspector are sent to a crushing room to be crushed and recycled as raw materials.

The grid pipe processing technology further comprises a shutdown process, wherein the shutdown process comprises the following steps:

when the production task of the pipe is finished and needs to be shut down, informing a material mixing worker at a hot mixer of the shut-down time in advance and controlling the adding amount of raw materials, decelerating a screw of an extruder to 0 at a speed of 4r/min during the shut-down, stopping the extruder screw to ensure that no residual materials exist in the extruder screw, and then sequentially stopping a vacuum pump, a cooling water circulation pipeline, a tractor, a cutting machine and an ink-jet printer;

step two, detaching the mouth mold, cleaning up the residual materials in the mold by using a cleaning tool such as a copper bar or a copper drill rod, polishing the end part and the flow channel of the mouth mold by using 500-mesh metallographic abrasive paper, coating antirust oil and storing the antirust oil in a specified area;

step three, all potentiometers are adjusted to be zero, and a water source, an air source and a power supply are cut off;

step four, cleaning a dust suction device, bagging and conveying the sawdust to a crushing room to be used as a raw material;

and fifthly, cleaning the ground and the working site, keeping the ground and the equipment clean, and putting the tools and the articles orderly.

EXAMPLE III

The grating pipe processing technology comprises the following steps:

checking whether a PVC raw material label, the pressure grade of a machine head of an extruder, an opening die, a core rod, a half block, a vacuum shaping box and a sealing washer on a cooling water tank conform to production requirements or not;

secondly, polishing the end face and the runner of the port mould by using 600-mesh metallographic abrasive paper before installing the port mould, determining that the inner heating ring is normal, polishing the port mould by using 1200-mesh metallographic abrasive paper, installing the port mould, screwing the screws diagonally during installing the port mould, adjusting the gap between the port mould, ensuring the tightness of the screws to be consistent, uniformly screwing the screws once before starting the extruder, preventing leakage, and preserving heat of the port mould without the inner heating ring within 30 minutes after installing the port mould;

checking whether the water, electricity and gas supply is normal, whether phenomena such as running, overflowing, dripping, leaking and blocking exist or not, processing in time, checking whether all emergency stop buttons are reset or not and whether potentiometers return to zero or not, then switching on a power supply of a main control box of the extruder, checking whether a control panel of the extruder prompts a fault alarm signal or not, and if the control panel displays the fault alarm signal, processing according to the fault alarm signal displayed by the control panel;

opening a cooling water circulation pipeline of the cooling water tank, checking whether a spray head in the cooling water tank is blocked, whether the water outlet direction of the spray head is correct and whether the water pressure meets obvious and unsatisfactory requirements, and timely processing if the water pressure is abnormal;

checking whether the operation of the hot mixer is normal, checking whether the operation of a temperature control meter, a thermocouple, a cooling fan, an oil pump, a cutting machine, a tractor, a pipe turnover frame, a limit switch, a dust collection device, a charging barrel and heaters in all areas of the machine head are normal, wherein the tractor is a crawler-type tractor;

sixthly, adjusting the positions of a saw blade and a riding wheel of the cutting machine, the feed depth, the feed speed and the revolution speed according to the specification of a product required by production, adjusting the heights of the riding wheels in a traction pipe and a water tank, ensuring that the center height of the production line is adjusted on a horizontal line, and preventing the pipe from being bent;

step seven, setting code spraying content of an ink-jet printer according to production requirements and then waiting, wherein the ink-jet printer is an ink-jet printer;

step eight, heating the extruder, raising the temperature of the neck ring die to 140 ℃, preserving heat, heating the temperature of other parts of the extruder to 160 ℃, preserving heat for 30-70 minutes after reaching the temperature, specifically, preserving heat for 30-50 minutes in summer and preserving heat for 50-70 minutes in winter, and setting the temperature (+/-10 ℃) of each area, the host machine, the traction rotating speed and the feeding speed (+/-10 RPM) according to the following table after reaching the heat preservation time;

section 1 of the barrel	200℃	Head 1 area	190℃	Speed of main engine	700
						Barrel 2 zone	185℃	Region 2 of machine head	200℃	Traction rotational speed	400
Barrel 3 zone	165℃	Region 3 of machine head	190℃	Rotational speed of feed	700
						Section 4 of the barrel	165℃
Confluence core	175℃

Step nine, adding the raw materials into a hot mixer for hot mixing treatment, wherein the raw materials comprise a PVC resin raw material and plastic auxiliaries such as calcium carbonate, a light stabilizer, a heat stabilizer, PE wax, paraffin, stearic acid, chlorinated polyethylene, an acrylate modifier, dioctyl ester, a whitening agent and the like, stirring for 30min at the hot mixing temperature of 130 ℃, uniformly mixing the materials, and feeding the mixture into a charging barrel;

step ten, starting a main motor of the extruder, enabling a screw to run at 10r/min, increasing the rotating speed until the mouth mold discharges materials, wherein the rotating speed increasing standard is 5r/min, until the rotating speed of the screw is increased to 35r/min, cleaning the extruded materials after the mouth mold discharges materials, adjusting the mouth mold gap once again after the materials are completely plasticized to enable the materials to be uniformly discharged, wrapping the discharged materials on a tractor, starting the tractor to start traction, and enabling the speed of the tractor to be consistent with the delivery speed of the pipe blank in the traction process;

step eleven, opening a vacuum pump of the vacuum shaping box, controlling the vacuum pressure to be 0.06Mpa, attaching the outer wall of the tube blank to the inner wall to form the shape of the tube blank, adjusting the position and the water level of the vacuum shaping box according to the forming condition of the tube blank to fully cool and shape the tube blank, then adjusting the water pressure to keep the water level of the vacuum shaping box at the position (taking the condition that a pointer of a water pressure gauge does not jump) and controlling the temperature of cooling water in a cooling water tank to be 10-20 ℃;

step twelve, after the pipe is basically formed, adjusting the gap of the neck ring mold again, adjusting the rotating speed of the screw rod, the traction speed and the heating temperature of each part of the extruder according to the conditions of the inner wall and the outer wall of the pipe until the product reaches the quality requirement and the maximum production speed, at the moment, continuously sending the pipe blank out of the extruder and forming under the action of a vacuum forming box and a cooling water tank, cutting the formed pipe by a cutting machine to obtain a pipe section meeting the requirement, and sucking sawdust of the collected pipe by a dust suction device to keep the production line and the workshop clean;

step thirteen, after the pipe sections are inspected to be qualified by an inspector, the pipe sections are sent to an ink jet printer to be printed with product marks and then packaged and put in storage, and the defective products screened out by the inspector are sent to a crushing room to be crushed and recycled as raw materials.

The grid pipe processing technology further comprises a shutdown process, and the shutdown process comprises the following steps:

when the production task of the pipe is finished and needs to be shut down, informing a material mixing worker at a hot mixer of the shut-down time in advance and controlling the adding amount of raw materials, decelerating a screw of an extruder to 0 at a speed of 5r/min during the shut-down, stopping the screw of the extruder, and then stopping a vacuum pump, a cooling water circulation pipeline, a tractor, a cutting machine and an ink-jet printer in sequence, wherein no residual materials are required to be stored in the screw after the screw of the extruder stops rotating;

step two, detaching the neck ring mold, cleaning up the residual materials in the mold by using a cleaning tool such as a copper bar or a copper drill rod, polishing the end part and the flow channel of the neck ring mold by using 600-mesh metallographic abrasive paper, coating antirust oil and storing the antirust oil in a specified area;

step three, all potentiometers are adjusted to be zero, and a water source, an air source and a power supply are cut off;

step four, cleaning a dust suction device, bagging and conveying the sawdust to a crushing room to be used as a raw material;

and fifthly, cleaning the ground and the working site, keeping the ground and the equipment clean, and putting the tools and the articles orderly.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (6)

1. A grating pipe processing technology is characterized by comprising the following steps:

checking whether a PVC raw material label, the pressure grade of a machine head of an extruder, an opening die, a core rod, a half block, a vacuum shaping box and a sealing washer on a cooling water tank conform to production requirements or not;

step two, polishing the end face and the flow channel of the neck ring with 400-sand-paper 600 meshes of sand paper before mounting the neck ring, determining that the inner heating ring is normal, polishing the neck ring completely with 1000-sand-paper 1200 meshes of sand paper, mounting the neck ring, screwing each screw diagonally during mounting the neck ring and adjusting the gap between the neck ring to ensure the tightness of each screw to be consistent, uniformly screwing the neck ring once before starting the extruder to prevent leakage, and keeping the temperature of the neck ring without the inner heating ring within 30 minutes after mounting the neck ring;

checking whether the water, electricity and gas supply is normal, whether phenomena such as running, overflowing, dripping, leaking and blocking exist or not, processing in time, checking whether all emergency stop buttons are reset or not and whether potentiometers return to zero or not, then switching on a power supply of a main control box of the extruder, checking whether a control panel of the extruder prompts a fault alarm signal or not, and if the control panel displays the fault alarm signal, processing according to the fault alarm signal displayed by the control panel;

opening a cooling water circulation pipeline of the cooling water tank, checking whether a spray head in the cooling water tank is blocked, whether the water outlet direction of the spray head is correct and whether the water pressure meets obvious and unsatisfactory requirements, and timely processing if the water pressure is abnormal;

checking whether the operation of the hot mixer is normal, and checking whether the operation of a temperature control meter, a thermocouple, a cooling fan, an oil pump, a cutting machine, a tractor, a pipe turnover frame, a limit switch, a dust collection device, a charging barrel and heaters in all areas of the machine head is normal;

sixthly, adjusting the positions of a saw blade and a riding wheel of the cutting machine, the feed depth, the feed speed and the revolution speed according to the specification of a product required by production, adjusting the heights of the riding wheels in a traction pipe and a water tank, ensuring that the center height of the production line is adjusted on a horizontal line, and preventing the pipe from being bent;

step seven, setting code spraying content of the code spraying machine according to production requirements and then waiting;

step eight, heating the extruder, raising the temperature of the neck ring to 140 ℃ for 130-;

section 1 of the barrel 190-200℃ Head 1 area 180-190℃ Speed of main engine 600-700 Barrel 2 zone 170-185℃ Region 2 of machine head 190-200℃ Traction rotational speed 200-400 Barrel 3 zone 150-165℃ Region 3 of machine head 180-190℃ Rotational speed of feed 500-700 Section 4 of the barrel 150-165℃ Confluence core 170-175℃

Step nine, adding the raw materials into a thermal mixer for thermal mixing treatment, wherein the thermal mixing temperature is 120-130 ℃, stirring for 30min to uniformly mix the materials, and feeding the mixture into a charging barrel;

step ten, starting a main motor of the extruder, enabling a screw to run at 6-10r/min, increasing the rotating speed until the mouth mold discharges materials, wherein the rotating speed increasing standard is 3-5 r/min until the rotating speed of the screw is increased to 25-35r/min, cleaning the extruded materials after the mouth mold discharges materials, adjusting the mouth mold gap once after the materials are completely plasticized to enable the materials to be uniformly discharged, wrapping the discharged materials on a tractor, starting the tractor to start to drag, and enabling the speed of the tractor to be consistent with the delivery speed of the tube blank in the dragging process;

step eleven, opening a vacuum pump of the vacuum shaping box, controlling the vacuum pressure to be 0.02-0.06 Mpa, attaching the outer wall of the tube blank to the inner wall to form the shape of the tube blank, adjusting the position and the water level of the vacuum shaping box according to the forming condition of the tube blank to fully cool and shape the tube blank, and then adjusting the water pressure to keep the water level of the vacuum shaping box at the position (taking the pointer of the water pressure gauge as the standard for not jumping);

step twelve, after the pipe is basically formed, adjusting the gap of the neck ring mold again, adjusting the rotating speed of the screw rod, the traction speed and the heating temperature of each part of the extruder according to the conditions of the inner wall and the outer wall of the pipe until the product reaches the quality requirement and the maximum production speed, at the moment, continuously sending the pipe blank out of the extruder and forming under the action of a vacuum forming box and a cooling water tank, cutting the formed pipe by a cutting machine to obtain a pipe section meeting the requirement, and sucking sawdust of the collected pipe by a dust suction device to keep the production line and the workshop clean;

and step thirteen, after being checked to be qualified by an inspector, the pipe sections are sent to an ink-jet printer to be printed with product codes and then packaged and put in storage, and the defective products screened out by the inspector are sent to a crushing room to be crushed and recycled as raw materials.

2. The grating pipe processing technology as claimed in claim 1, wherein the heat preservation temperature of the die is 130-140 ℃.

3. A grating pipe processing technology as claimed in claim 1, wherein the temperature of the cooling water in the cooling water tank is 10-20 ℃.

4. A grid tube machining process according to claim 1, further comprising a shutdown process, the shutdown process comprising the steps of:

when the production task of the pipe is finished and needs to be shut down, informing a material mixing worker at a hot mixer of the shut-down time in advance and controlling the adding amount of raw materials, decelerating a screw of an extruder to 0 at a speed of 2-5r/min during the shut-down, stopping the screw of the extruder, and then stopping a vacuum pump, a cooling water circulation pipeline, a tractor, a cutting machine and an ink-jet printer in sequence, wherein no excess material exists in the screw after the screw of the extruder stops rotating;

step two, detaching the neck ring, cleaning up the residual materials in the die by using a cleaning tool, polishing the end part and the flow channel of the neck ring by using 300-plus 600-mesh sand paper, coating antirust oil and storing the antirust oil in a specified area;

step three, all potentiometers are adjusted to be zero, and a water source, an air source and a power supply are cut off;

step four, cleaning a dust suction device, bagging and conveying the sawdust to a crushing room to be used as a raw material;

and fifthly, cleaning the ground and the working site, keeping the ground and the equipment clean, and putting the tools and the articles orderly.

5. The grating pipe processing technology as claimed in claim 1 or 4, wherein the sand paper is metallographic sand paper.

6. A grating pipe processing technology as claimed in claim 4, wherein the tool is a copper rod or a copper brazing filler metal.

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