CN101352916B - Method for producing heat-resisting polyethylene tube - Google Patents
Method for producing heat-resisting polyethylene tube Download PDFInfo
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- CN101352916B CN101352916B CN200710044150A CN200710044150A CN101352916B CN 101352916 B CN101352916 B CN 101352916B CN 200710044150 A CN200710044150 A CN 200710044150A CN 200710044150 A CN200710044150 A CN 200710044150A CN 101352916 B CN101352916 B CN 101352916B
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/565—Screws having projections other than the thread, e.g. pins
-
- 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
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a production method of a heat resistant polyethylene tube; the production method is realized by the following steps: preparing raw materials; using a suction system to suck tubing special material into a vacuum charging barrel, switching on a temperature regulating device of the charging barrel to control the temperature of the material in the charging barrel to be 100 minus or plus 5DEG C, then sending dried material into a screw machine barrel of a polyolefine extruding machine; adjusting the temperature at the heating areas of the machine barrel of the extruding machine; adjusting the pressure at the machine head of the extruding machine; melting the heated material in the machine barrel and extruding tube blanks out from a die head necking mold and a core rod which have short structures under a set pressure; diameter setting and cooling of the extruded tube blanks; the production method not only can be used for producing the heat resistant polyethylene tube (PE-RT) on a common polyolefine extruding machine, but also can eliminate the phenomena of tube yellowing, uneven wall thickness and unsmooth inner and outer surfaces in the extruding process caused by poor fluidity and strong viscidity of the heat resistant polyethylene (PE-RT) tubing special material.
Description
Technical field
The present invention relates to a kind of heat-proof polythene (PE-RT) pipe, relate in particular to the production method of a kind of hot and cold water with heat-proof polythene (PE-RT) pipe.
Background technology
Heat-proof polythene (PE-RT) Guan Yin has good heat resistance and long-term withstand voltage properties, in heat resistant type pressure-bearing field, particularly has special advantages on the terrestrial surface radiation engineering is used.China's " catalogue (basis in 2005) is instructed in industry restructuring " classifies it as the encouragement series products, and as national comfortable house recommended products, in the various fields extensive use.
The production principle of heat-proof polythene (PE-RT) pipe: heat-proof polythene (PE-RT) special material for tube is joined in the machine barrel of polyolefin extruder, under the extruding of screw rod rotation, promoting, make raw material fusion plastification under high-temperature and high-pressure conditions; The screw rod that rotates continuously pushes extrusion die to melting charge more then, makes the melt that is extruded from extrusion die become tubing.
Because the processing temperature scope of heat-proof polythene (PE-RT) is not very wide, its melt temperature generally will be controlled at about 195 ℃, improve extrusion equipment melt zone and die head mouth mould section temperature and help improving tubing inside and outside wall surface quality, but the too high meeting of melt temperature makes melt strength reduce, easily decompose, and has reduced the physical and mechanical property of tubing.So the performance that the production method of prior art can cause causing because of heating is decomposed.
How to produce heat-proof polythene (PE-RT) pipe that meets standard-required on general polyolefin single screw extrusion machine, be the problem that the technical staff need solve.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of production method of heat-resisting polyethylene tube, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Prepare raw material: heat-proof polythene (PE-RT) special material for tube belongs to medium density polyethylene, and it is formed by vinyl monomer and octene monomer copolymerization;
With the suction system special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, material temperature in the barrel is controlled at 100 ± 5 ℃, the material after will drying is then sent into the spiro rod machine tube of polyolefin extruder; Described polyolefin extruder adopts the gradation type screw rod: the feeding section spiral groove depth is 50
0 -0.02Mm, below two sections be increased to 65 gradually
-0.14 -0.18Mm; Two 10 ± 1mm circulating heat conduction oil canals are processed in screw rod inside: oil-in 1, oil-out 2; Conduction oil can be realized the cold and hot exchange of conduction oil by the oil-in and the oil-out of oily canal, makes extruder temperature be stabilized in 110 ± 2 ℃;
Adjust the temperature of each thermal treatment zone of extruder barrel;
Adjust the temperature of each thermal treatment zone of extruder die head;
Adjust cross-head pressure;
The fused materials that has been heated to set point of temperature in the machine barrel is extruded pipe with the pressure of regulation from die head mouth mould and plug; Described die head mouth mould and plug adopt short body structure: length is between 110 ± 10mm;
Extrude the sizing cooling of pipe; Described calibration sleeve also comprises: the water nozzle of a 10 ± 0.5mm of processing makes calibration sleeve form a cooling jacket;
Wherein in " adjusting the temperature of each thermal treatment zone of extruder barrel " step: I district, 170 ℃; The II district, 175 ℃; The III district, 180 ℃; The IV district, 185 ℃; The V district, 182 ℃; In " adjusting the temperature of each thermal treatment zone of extruder die head " step: I district, 182 ± 5 ℃; The II district, 181 ± 5 ℃; The III district, 181 ± 5 ℃; The IV district, 181 ± 5 ℃; The V district, 195 ± 5 ℃; In " adjusting cross-head pressure " step: pressure is 16.2Mpa.
Compared with prior art, the invention has the beneficial effects as follows: can on existing general polyolefin extruder, produce heat-proof polythene (PE-RT) and manage, can solve again because of phenomenons such as strong, the mobile poor jaundice of tubing in extrusion, the wall unevenness that causes of viscosity of heat-proof polythene (PE-RT) special material for tube spared, surfaces externally and internally is rough.
Description of drawings
Fig. 1 is the screw-rod structure schematic diagram of general polyolefin single screw extrusion machine;
Fig. 2 is the screw-rod structure schematic diagram that adopts among the present invention;
Fig. 3 is polyolefin die head mouth mould and a mandrel structure schematic diagram in the prior art;
Fig. 4 is die head mouth mould and the mandrel structure schematic diagram that adopts among the present invention;
Fig. 5 is a calibration sleeve structural representation in the prior art;
Fig. 6 is the calibration sleeve structural representation that adopts among the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is further described:
The present invention realizes by following steps:
Raw materials for production are qualified heat-proof polythene (PE-RT) special material for tube;
With the suction system heat-proof polythene (PE-RT) special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, the temperature of charge in the barrel is controlled at 100 ± 5 ℃, then the material of oven dry is sent into the spiro rod machine tube of polyolefin extruder; Described polyolefin extruder adopts the gradation type screw rod;
Adjust the temperature of each thermal treatment zone of extruder barrel: I district, 170 ℃; The II district, 175 ℃; The III district, 180 ℃; The IV district, 185 ℃; The V district, 182 ℃;
According to specification and the wall thickness of producing tubing, adjust the temperature of each thermal treatment zone of extruder die head: I district, 182 ± 5 ℃; The II district, 181 ± 5 ℃; The III district, 181 ± 5 ℃; The IV district, 181 ± 5 ℃; The V district, 195 ± 5 ℃;
Adjusting cross-head pressure is 16.2Mpa;
The fused materials that has been heated to set point of temperature in the machine barrel is extruded pipe with the pressure of regulation from die head mouth mould and plug; Described die head mouth mould and plug adopt short body structure: length is between 110 ± 10mm;
Extrude pipe and carry out liquid-ring type cooling in advance before entering calibration sleeve, tentatively Leng Que pipe enters Vacuum shaping cooling, spray cooling again and soaks cooling.
Scrap build among the present invention:
1. screw rod
1) with the spiral groove depth of original screw rod feeding section by 46
0 -0.02Mm changes 50 into
0 -0.02Mm, below the section be increased to 65 gradually
-0.14 -0.18Mm, (among the figure: homogenizing metering section 10, compression section 20, feeding section 30) as shown in Figure 1 and Figure 2; Changing of spiral groove depth is shallow, has strengthened the contact area of material and machine barrel, has improved the fusion and the plasticizing of material, has reduced processing temperature simultaneously;
2) screw rod inside is processed into two 10 ± 1mm circulating heat conduction oil canals: oil-in 1, oil-out 2, as shown in Figure 2, conduction oil can be realized the cold and hot exchange of conduction oil by the oil-in and the oil-out of oily canal, make extruder temperature be stabilized in 110 ± 2 ℃, prevent prolongation because of process time, cause extruder temperature to rise, thereby influenced the stability of extruding pipe material;
2. die head mouth mould and plug
Change the length of original die head mouth mould and plug into 110 ± 10mm by 140 ± 10mm, as shown in Figure 3, Figure 4.The shortening of die head mouth mould and plug length has reduced the pressure of melt, and it is strong, mobile poor to have solved because of the viscosity of heat-proof polythene (PE-RT) special material for tube, and the inhomogeneous and mould of the tube wall thickness that causes leaks expects phenomenon;
3. calibration sleeve
The water nozzle 3 of a 10 ± 0.5mm of processing on original calibration sleeve makes calibration sleeve form a cooling jacket, as Fig. 5, shown in Figure 6.Extruding pipe material carries out water ring cooling in advance before entering calibration sleeve, tentatively Leng Que pipe helps the sizing moulding, has improved the stability of tubing.
Embodiment 1 (productions of dn20x 2.0 tubing)
With the suction system heat-proof polythene (PE-RT) special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, the material of oven dry is sent into the polyolefin spiro rod machine tube, adjust each Heating Zone Temperature of machine barrel and cross-head pressure by technological requirement, simultaneously the temperature of each thermal treatment zone of extruder die head is adjusted into: I district, 180 ℃; The II district, 179 ℃; The III district, 179 ℃; The IV district, 179 ℃; The V district, 193 ℃; The tubing of producing meets the relevant criterion requirement;
Embodiment 2 (productions of dn25x 2.3 tubing)
With the suction system heat-proof polythene (PE-RT) special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, the material of oven dry is sent into the polyolefin spiro rod machine tube, adjust each Heating Zone Temperature of machine barrel and cross-head pressure by technological requirement, simultaneously the temperature of each thermal treatment zone of extruder die head is adjusted into: I district, 182 ℃; The II district, 180 ℃; The III district, 181 ℃; The IV district, 181 ℃; The V district, 195 ℃; The tubing of producing meets the relevant criterion requirement;
Embodiment 3 (productions of dn32x 2.9 tubing)
With the suction system heat-proof polythene (PE-RT) special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, the material of oven dry is sent into the polyolefin spiro rod machine tube, adjust each Heating Zone Temperature of machine barrel and cross-head pressure by technological requirement, simultaneously the temperature of each thermal treatment zone of extruder die head is adjusted into: I district, 187 ℃; The II district, 186 ℃; The III district, 186 ℃; The IV district, 186 ℃; The V district, 200 ℃; The tubing of producing meets the relevant criterion requirement.
Use the source of raw material among the present invention:
Heat-proof polythene (PE-RT) special material for tube, Dow Chemical, DOWLEX2344E, first material authentication by the international BODYCOTE of certification authority.
The present invention is with heat-proof polythene (PE-RT) special material for tube, join in the improved polyolefin single screw extrusion machine and extrude, easy to process, stable performance, the tubing jaundice can not occur, wall unevenness is even, surfaces externally and internally is rough etc. influences the phenomenon of product quality.
Claims (1)
1. the production method of a heat-resisting polyethylene tube, realize by following steps:
Prepare raw material: heat-proof polythene tubing PP Pipe Compound belongs to medium density polyethylene, and it is formed by vinyl monomer and octene monomer copolymerization;
With the suction system special material for tube is sucked the vacuum barrel, open the barrel temperature adjusting apparatus, material temperature in the barrel is controlled at 100 ± 5 ℃, the material after will drying is then sent into the spiro rod machine tube of polyolefin extruder; Described polyolefin extruder adopts the gradation type screw rod: the feeding section spiral groove depth is 50
0 -0.02Mm, below two sections be increased to 65 gradually
-0.14 -0.18Mm; Two 10 ± 1mm circulating heat conduction oil canals are processed in screw rod inside: oil-in 1, oil-out 2; Conduction oil can be realized the cold and hot exchange of conduction oil by the oil-in and the oil-out of oily canal, makes extruder temperature be stabilized in 110 ± 2 ℃;
Adjust the temperature of each thermal treatment zone of extruder barrel;
Adjust the temperature of each thermal treatment zone of extruder die head;
Adjust cross-head pressure;
The fused materials that has been heated to set point of temperature in the machine barrel is extruded pipe with the pressure of regulation from die head mouth mould and plug; Described die head mouth mould and plug adopt short body structure: length is between 110 ± 10mm;
Extrude the sizing cooling of pipe; Described calibration sleeve also comprises: the water nozzle of a 10 ± 0.5mm of processing makes calibration sleeve form a cooling jacket;
Wherein in " adjusting the temperature of each thermal treatment zone of extruder barrel " step: I district, 170 ℃; The II district, 175 ℃; The III district, 180 ℃; The IV district, 185 ℃; The V district, 182 ℃; In " adjusting the temperature of each thermal treatment zone of extruder die head " step: I district, 182 ± 5 ℃; The II district, 181 ± 5 ℃; The III district, 181 ± 5 ℃; The IV district, 181 ± 5 ℃; The V district, 195 ± 5 ℃; In " adjusting cross-head pressure " step: pressure is 16.2Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710044150A CN101352916B (en) | 2007-07-24 | 2007-07-24 | Method for producing heat-resisting polyethylene tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710044150A CN101352916B (en) | 2007-07-24 | 2007-07-24 | Method for producing heat-resisting polyethylene tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101352916A CN101352916A (en) | 2009-01-28 |
| CN101352916B true CN101352916B (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710044150A Expired - Fee Related CN101352916B (en) | 2007-07-24 | 2007-07-24 | Method for producing heat-resisting polyethylene tube |
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|---|---|
| CN (1) | CN101352916B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105128374A (en) * | 2015-08-24 | 2015-12-09 | 江苏洁润管业有限公司 | PE pipe production technology |
| CN104806846B (en) * | 2015-04-24 | 2016-06-29 | 河北宏广橡塑金属制品有限公司 | Oil transportation insulation flexible compound plastic high voltage conveying pipe production process |
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| CN102601968B (en) * | 2012-03-09 | 2014-06-11 | 天津市盈德意利保温材料有限公司 | Production process of high-density polyethylene outer sheath tube and outer sheath tube mold |
| CN102729501B (en) * | 2012-06-28 | 2016-04-27 | 安徽都邦电器有限公司 | A kind of silicon rubber strengthens the production method of flexible pipe |
| CN103624948A (en) * | 2012-08-20 | 2014-03-12 | 乐普（北京）医疗器械股份有限公司 | Extrusion molding method for medical catheter tube |
| CN103044745B (en) * | 2012-12-05 | 2015-07-22 | 济南赛辰高分子材料有限公司 | Anticorrosive, wax-proof and high-temperature-resistant polyethylene tube for oil extraction and preparation method of polyethylene tube |
| CN104260318A (en) * | 2014-08-12 | 2015-01-07 | 重庆阮氏塑业有限公司 | Method for improving roughness of inner wall and outer wall of PE solid-wall pipeline |
| CN104441674B (en) * | 2014-11-17 | 2016-08-17 | 厦门建霖工业有限公司 | A kind of PE-RT pipeline moulding process |
| CN107588249A (en) * | 2017-10-19 | 2018-01-16 | 广东中讯通讯设备实业有限公司 | A kind of steel strip reinforced pvc pipe and its manufacture craft |
| EP3710734A1 (en) | 2017-11-17 | 2020-09-23 | ExxonMobil Chemical Patents Inc. | Pe-rt pipes and processes for making the same |
| CN108081647A (en) * | 2017-12-13 | 2018-05-29 | 贵州黔峰管业有限公司 | A kind of manufacturing process of PE feed pipes |
| CN109016449B (en) * | 2018-08-30 | 2023-11-24 | 华南理工大学 | Method and equipment for rolling and forming ultrahigh molecular weight polymer based on dynamic extension |
| CN113787689A (en) * | 2021-01-05 | 2021-12-14 | 浙江枫叶管业科技股份有限公司 | High-toughness PE pipe extrusion device and production process |
| CN115558182A (en) * | 2022-10-11 | 2023-01-03 | 吴忠市恒通塑料制品有限公司 | Preparation method of high-temperature-resistant polyethylene heat pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2889694Y (en) * | 2005-12-29 | 2007-04-18 | 施经东 | Cross-linked high density polyethylene pipe extrusion mould |
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2007
- 2007-07-24 CN CN200710044150A patent/CN101352916B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2889694Y (en) * | 2005-12-29 | 2007-04-18 | 施经东 | Cross-linked high density polyethylene pipe extrusion mould |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806846B (en) * | 2015-04-24 | 2016-06-29 | 河北宏广橡塑金属制品有限公司 | Oil transportation insulation flexible compound plastic high voltage conveying pipe production process |
| CN105128374A (en) * | 2015-08-24 | 2015-12-09 | 江苏洁润管业有限公司 | PE pipe production technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101352916A (en) | 2009-01-28 |
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