CN110645415A - Dampproof high-temperature-resistant PE pipe and processing technology thereof - Google Patents
Dampproof high-temperature-resistant PE pipe and processing technology thereof Download PDFInfo
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- CN110645415A CN110645415A CN201910924743.0A CN201910924743A CN110645415A CN 110645415 A CN110645415 A CN 110645415A CN 201910924743 A CN201910924743 A CN 201910924743A CN 110645415 A CN110645415 A CN 110645415A
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- pipe
- temperature
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- dampproof
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/535—Screws with thread pitch varying along the longitudinal axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
Abstract
The invention discloses a dampproof high temperature resistant PE pipe and a processing technique thereof, which increases the dampproof and high temperature resistant capability of the PE pipe through a dampproof layer and a high temperature resistant layer, increases the service life of the PE pipe under the humid and high temperature conditions, heats the plastic in an external heating cylinder through a heating device of an extrusion molding machine in a heating mode with the heating temperature of 80-120 ℃, so that the PE pipe can not generate the phenomena of numb outer wall and no glossiness of the product, simultaneously, utilizes a vacuum shaping system to cool the pipe in a vacuum box, ensures that the roundness of the pipe is better and the appearance is smoother through the vacuum energy, increases the strength of the PE pipe through the three-stage feeding of a screw rod on the extrusion molding machine, has good color belt material, is easier to extrude, simultaneously, can not cause the abnormal conditions of fatness and unstable production of the pipe, has certain protection on a mold, and ensures that the production qualification rate of the PE pipe is higher, the quality of the product is better.
Description
Technical Field
The invention relates to the technical field of pressure resistance of PE pipes, in particular to a dampproof high-temperature-resistant PE pipe and a processing technology thereof.
Background
PE is polyethylene plastic, the most basic plastic, plastic bags, preservative films and the like are PE, and HDPE is a nonpolar thermoplastic resin with high crystallinity. The appearance of the original HDPE is milky white, and the micro-thin section is semitransparent to a certain degree. PE has excellent resistance to most domestic and industrial chemicals, and PE pipes include medium density polyethylene pipes and high density polyethylene pipes. The series was classified according to wall thickness as SDR11 and SDR 17.6. The former is suitable for conveying gaseous artificial gas, natural gas and liquefied petroleum gas, and the latter is mainly used for conveying natural gas. Compared with a steel pipe, the construction process is simple, certain flexibility is achieved, and more importantly, the PE pipe is not used for corrosion prevention treatment, a large number of working procedures are saved, in the actual use process, the use environment of the PE pipe has higher requirements on the process of the PE pipe, the service life of the common PE pipe is shortened under the conditions of humidity and high temperature, and in the production process of the PE pipe, the phenomena that the outer wall is numb, the product has no glossiness, the outer diameter is smaller and the out-of-roundness is large can be frequently generated, so that the PE pipe with the characteristics of moisture resistance and high temperature resistance and the processing process thereof are designed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a moisture-proof high-temperature-resistant PE pipe and a processing technology thereof, and solves the problems that the service life of a common PE pipe is shortened under the conditions of humidity and high temperature, and the phenomena of numb outer wall, no glossiness, small outer diameter and large out-of-roundness of a product are often generated in the production process of the PE pipe.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a dampproofing high temperature resistant PE pipe, includes PE pipe body, dampproof course and high temperature resistant layer, the dampproof course is coated at the surface of PE pipe body, and thickness is 90-200 microns, the surface of dampproof course is coated to the high temperature resistant layer, and thickness is 180 and gives other materials 200 microns, the high temperature resistant layer is formed by the coating of high temperature resistant priming paint, the dampproof course adopts dampproofing coating to form.
A processing technology of a dampproof high-temperature-resistant PE pipe is characterized by comprising the following steps:
preparing raw material proportion of a PE pipeline, mixing the raw materials well, and adding a certain amount of return materials;
step (B), sucking the mixed raw materials into a dryer through a material sucking device for drying, and sucking the dried raw materials into a hopper;
step (C), after the drying is finished, production is carried out by using production equipment, and the main leading-out device of the production equipment consists of an extrusion system, a transmission system, a heating and cooling system and a vacuum shaping system;
and (D) after production is finished, uniformly pulling out the pipe by using a tractor, and then cutting by using a cutting machine.
In the processing technology of the dampproof high-temperature resistant PE pipe, in the step (A), the PE pipe comprises the following raw materials and components,
polyethylene resin: 80-100 parts of a binder;
expandable polystyrene EPS: 50-60 parts;
HDPE: 30-60 parts.
In the step (B), the drying device includes a dehumidifier, a heater, and a drying box, the air heated by the heater is dried in the drying box, and the moisture is discharged through the dehumidifier, so that the raw material is dried and enters the hopper, and the temperature of the drying device is 120-.
In the step (C), the extrusion system includes a screw, a cylinder, a hopper, a head, and a mold, and the plastic is plasticized into a uniform melt by the extrusion system and continuously extruded out of the head by the screw under the pressure established in the process.
In the processing technology of the moisture-proof high-temperature-resistant PE pipe, in the step (C), the transmission system is used for driving the screw, and the motor, the reducer and the bearing supply the screw with the torque and the rotating speed required in the extrusion process.
In the step (C), the heating and cooling system includes an extruding machine, the extruding machine is used for resistance heating, the heating plates are installed on the machine body, the machine neck and the machine head, the heating device is made of plastic in an external heating cylinder, and the heating temperature is 80-120 ℃.
In the step (C), the vacuum shaping system mainly cools the pipe in the vacuum box, and the pipe is less out-of-roundness and smoother in appearance due to vacuum energy.
In the processing technology of the dampproof high-temperature-resistant PE pipe, three effective lengths of a screw rod on the extruding machine are determined according to the diameter, the screw pitch and the screw depth of the screw rod and respectively comprise a conveying section, a compression section and a metering section, the conveying section is used for preheating, compressing and compacting the material, the extruded material is a solid and is conveyed like a plug, the volume of a screw groove of the compression section is gradually reduced from large, the temperature is required to reach the plasticizing degree of the material to generate compression, the material is compressed to one from the third conveying section to complete the plasticizing, and the metering section is used for keeping the plasticizing temperature of the material and accurately and quantitatively conveying the melt material to supply a machine head at the temperature of 130-140 ℃.
The invention has the beneficial effects that: the PE pipe has reasonable structural design, on one hand, the moisture-proof and high-temperature-resistant capabilities of the PE pipe are improved through the moisture-proof layer and the high-temperature-resistant layer, the service life of the PE pipe is prolonged under the conditions of moisture and high temperature, on the other hand, the PE pipe is heated by the plastic in the external heating cylinder through the heating device for the extrusion molding machine in a heating mode with the heating temperature of 80-120 ℃, so that the phenomena that the outer wall of the PE pipe is numb and the product has no glossiness are avoided, meanwhile, the pipe is cooled in the vacuum box through the vacuum shaping system, the roundness of the pipe is better through vacuum energy, the appearance is smoother, the production qualification rate of the PE pipe is higher, and the quality of the product is better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a process flow diagram of the present invention.
In the figure: 1. PE pipe body, 2, dampproof course, 3, high temperature resistant layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Referring to FIGS. 1-2: the utility model provides a dampproofing high temperature resistance PE pipe, includes PE pipe body 1, dampproof course 2 and high temperature resistant layer 3, its characterized in that: the coating of dampproof course 2 is at the surface of PE pipe body 1, and thickness is 90-200 microns, and the coating of high temperature resistant layer 3 is at the surface of dampproof course 2, and thickness is 180 and supplys with medicinal herbs 200 microns, and high temperature resistant layer 3 is formed by the coating of high temperature resistant priming paint, and dampproof course 2 adopts dampproof coating to form.
A processing technology of a dampproof high-temperature-resistant PE pipe is characterized by comprising the following steps:
step A, preparing the raw material proportion of a PE pipeline, mixing the raw materials well, and adding a certain amount of return materials;
b, sucking the mixed raw materials into a dryer through suction equipment for drying, and sucking the dried raw materials into a hopper;
step C, after drying, producing by using production equipment, wherein the production equipment mainly comprises a leading-out device, a heating and cooling system and a vacuum shaping system;
and D, after the production is finished, uniformly pulling out the pipe by using a tractor, and then cutting by using a cutting machine.
Preferably, in the step B, the drying device includes a dehumidifier, a heater, and a drying box, the air heated by the heater is dried in the drying box, the moisture is discharged through the dehumidifier, so that the raw material is dried and enters the hopper, and the temperature of the drying device is 120-.
Preferably, in step C, the extrusion system comprises a screw, a barrel, a hopper, a head and a die, and the plastic is plasticized into a homogeneous melt by the extrusion system and continuously extruded by the screw under the pressure established in the process.
Preferably, in the step C, the transmission system is used for driving the screw, and the motor, the reducer and the bearing supply the screw with the required torque and rotation speed in the extrusion process.
Preferably, in the step C, the heating and cooling system comprises an extruder, the extruder is heated by resistance, the heating plates are arranged on the machine body, the machine neck and each part of the machine head, and the heating device is made of plastic in an external heating cylinder, and the heating temperature is 80-120 ℃.
Preferably, in the step C, the vacuum shaping system mainly cools the pipe in a vacuum box, and the pipe is less out-of-roundness and smoother in appearance through vacuum energy.
Preferably, the screw on the extruder determines three effective lengths according to the diameter, the screw pitch and the screw depth of the screw, and the three effective lengths are respectively a conveying section, a compression section and a metering section, wherein the conveying section is used for preheating and compacting the material, the extruded material is a solid and is conveyed like a plug, the volume of a screw groove of the compression section is gradually reduced from large, the temperature is required to reach the material plasticizing degree, compression is generated, the plasticizing is completed from the conveying section III to first, the metering section is used for maintaining the plasticizing temperature of the material, and the melt material is accurately and quantitatively conveyed to a machine head at the temperature of 130-140 ℃.
In conclusion, when the invention is used, the moisture-proof and high temperature resistant capabilities of the PE pipe are increased through the moisture-proof layer and the high temperature resistant layer, the service life of the PE pipe is prolonged under the conditions of moisture and high temperature, the heating device for the extrusion molding machine heats the plastic in the cylinder from the outside in a heating way with the heating temperature of 80-120 ℃, so that the PE pipe can generate a heating mode without the phenomena of numb outer wall and no glossiness of the product, meanwhile, the pipe is cooled in the vacuum box by utilizing the vacuum forming system, the roundness of the pipe is better through the vacuum energy, the appearance is smoother, the strength of the PE pipe is increased through the three-section feeding of the screw on the extrusion molding machine, the color belt material is plasticized well and is easier to extrude, meanwhile, the abnormal conditions of pipeline fatness and unstable production can not be caused, the matched mold has certain protection, so that the production qualification rate of the PE pipe is higher, the quality of the product is better.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a dampproofing high temperature resistance PE pipe, includes PE pipe body (1), dampproof course (2) and high temperature resistant layer (3), its characterized in that: the outer surface of the PE pipe body (1) is coated with the moisture-proof layer (2), the thickness of the moisture-proof layer is 90-200 microns, the outer surface of the moisture-proof layer (2) is coated with the high-temperature-resistant layer (3), the thickness of the high-temperature-resistant layer is 180-200 microns, the high-temperature-resistant layer (3) is formed by coating high-temperature-resistant primer, and the moisture-proof layer (2) is formed by coating moisture-proof paint.
2. The processing technology of the PE pipe with moisture resistance and high temperature resistance as claimed in claim 1, comprising the following steps:
preparing raw material proportion of a PE pipeline, mixing the raw materials well, and adding a certain amount of return materials;
step (B), sucking the mixed raw materials into a dryer through a material sucking device for drying, and sucking the dried raw materials into a hopper;
step (C), after the drying is finished, production is carried out by using production equipment, and the main leading-out device of the production equipment consists of an extrusion system, a transmission system, a heating and cooling system and a vacuum shaping system;
and (D) after production is finished, uniformly pulling out the pipe by using a tractor, and then cutting by using a cutting machine.
3. The processing technology of the dampproof high-temperature-resistant PE pipe as claimed in claim 2, wherein the processing technology comprises the following steps: in the step (A), the PE pipeline comprises the following raw materials and components,
polyethylene resin: 80-100 parts of a binder;
expandable polystyrene EPS: 50-60 parts;
HDPE: 30-60 parts.
4. The processing technology of the dampproof high-temperature-resistant PE pipe as claimed in claim 2, wherein the processing technology comprises the following steps: in the step (B), the drying equipment comprises a dehumidifier, a heater and a drying box, the air of the raw material heated by the heater is dried in the drying box, and the moisture is discharged through the dehumidifier, so that the raw material is dried and enters the hopper, and the temperature of the drying equipment is 120-150 ℃.
5. The process for preparing the PE pipe with moisture resistance and high temperature resistance according to claim 2, wherein the process comprises the following steps: in step (C), the extrusion system comprises a screw, a barrel, a hopper, a head and a die, and the plastic is plasticized into a uniform melt by the extrusion system and continuously extruded out of the head by the screw under the pressure established in the process.
6. The processing technology of the dampproof high-temperature-resistant PE pipe as claimed in claim 2, wherein the processing technology comprises the following steps: in the step (C), the transmission system is used for driving the screw, and the motor, the reducer and the bearing supply the screw with the required torque and rotation speed in the extrusion process.
7. The processing technology of the dampproof high-temperature-resistant PE pipe as claimed in claim 2, wherein the processing technology comprises the following steps: in the step (C), the heating and cooling system comprises an extruding machine, the extruding machine adopts resistance heating, heating sheets are arranged on the machine body, the machine neck and the machine head, and a heating device is used for heating the plastic in the cylinder from the outside, and the heating temperature is 80-120 ℃.
8. The processing technology of the dampproof high-temperature-resistant PE pipe as claimed in claim 2, wherein the processing technology comprises the following steps: in the step (C), the vacuum shaping system mainly cools the pipe in a vacuum box, and the pipe is less out-of-roundness and smoother in appearance through vacuum.
9. The processing technology of the dampproof high-temperature-resistant PE pipe according to claim 7, characterized in that: the screw on the plastic extruding machine determines three effective lengths according to the diameter, the screw pitch and the screw depth of the screw, and the three effective lengths are respectively a conveying section, a compression section and a metering section, wherein in the conveying section, a material is preheated and compacted under pressure, after extrusion, a solid is conveyed like a plug, the volume of a screw groove of the compression section is gradually reduced from large, the compression is generated when the temperature reaches the plasticizing degree of the material, the material is compressed to one from the third conveying section to complete the plasticization, and in the metering section, the material keeps the plasticizing temperature, and the melt material is accurately and quantitatively conveyed to be supplied to a machine head at the temperature of 130-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910924743.0A CN110645415A (en) | 2019-09-27 | 2019-09-27 | Dampproof high-temperature-resistant PE pipe and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910924743.0A CN110645415A (en) | 2019-09-27 | 2019-09-27 | Dampproof high-temperature-resistant PE pipe and processing technology thereof |
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| CN110645415A true CN110645415A (en) | 2020-01-03 |
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| CN202528412U (en) * | 2012-03-30 | 2012-11-14 | 上海金湖挤出设备有限公司 | Efficient polyolefin single screw rod extruder with length-diameter ratio of 33 |
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