CN104760261A - Preparation process of PE (Poly Ethylene) ultra-large-diameter thin-wall pipe material - Google Patents
Preparation process of PE (Poly Ethylene) ultra-large-diameter thin-wall pipe material Download PDFInfo
- Publication number
- CN104760261A CN104760261A CN201510134061.1A CN201510134061A CN104760261A CN 104760261 A CN104760261 A CN 104760261A CN 201510134061 A CN201510134061 A CN 201510134061A CN 104760261 A CN104760261 A CN 104760261A
- Authority
- CN
- China
- Prior art keywords
- machine head
- preparation technology
- extruder
- super large
- large caliber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a preparation process of a PE (Poly Ethylene) ultra-large-diameter thin-wall pipe material. The preparation process adopts an improved machine head of an extruding machine. The improved machine head comprises an opening mold, an opening mold seat, a sizing sleeve, a core mold, a machine head body and a connector which are connected in sequence, wherein the opening mold is arranged in the opening mold seat; the two sides of the machine head body are provided with adjusting screws; the tail end of the machine head body is provided with the connector; the machine head body is internally provided with an air flowing channel; and the air flowing channel extends outwards from the side surface of the tail end of the machine head body and is communicated with the gas discharging pipeline at the outer part. The preparation process has the advantages that internal air cooling is added, and the air flowing direction is opposite to the extruding direction of the pipe material, so that the cooling effect of the pipe material is improved; by the method, the inner part of the pipe material is cooled simultaneously, so that the problems of non-circularity and nonstandard caused by drooping of melt due to reduction of the gravity and delayed and insufficient cooling are prevented; and the heat of the machine head is guaranteed to be taken away as little as possible, the internal temperature of the machine head is uniform, the action is obvious and the effect is remarkable.
Description
Technical field
The present invention relates to a kind of preparation technology of PE super large caliber thick-wall tube, belong to polyvinyl piping materials technical field.
Background technology
Super large caliber heavy wall PE pipeline typically refers to the solid wall pipe road of external diameter (DN) at more than 1000mm.In recent years, the demand of heavy caliber PE pressure pipeline is constantly continuing to rise, wherein, high density polyethylene (High DensityPolyethylene, referred to as " HDPE "), with its have good heat resistance and cold resistance, chemical stability good, also there is the various features such as higher rigidity and toughness, mechanical strength be good, and be subject to the favor of people, be widely used.
HDPE is high crystalline polymer, and molding shrinkage, 1.5%-3%, in manufacturing process, uses extruder fusion plastification to extrude, melting tube blank extrude from die head after by sizing tube, need accurately to control its size in cooling procedure.This process not only can adopt vacuum sizing method but also can adopt interior compression set shot, and they all require that melting tube blank is by after sizing tube, cools sizing rapidly, to ensure the accurate external diameter of tubing and ovality requirement.Particularly for super large caliber thick-wall tube, heavy wall pipe easily stays due to deadweight and causes wall unevenness even, and heat radiation difficulty, external diameter is difficult to control.Therefore, cooling sizing seems very important, it is very difficult for carrying out uniform cooling rapidly to the HDPE tubing of super large caliber heavy wall, although by after vacuum cooled sizing, pipe outer surface is cooling curing, but tubing major part is still in molten condition, and melting heat is passed to tube surfaces rapidly, also uncured melting internal layer is very easily sagging under the deadweight of tubing, cause tube wall thickness uneven and larger to ovality.Therefore, be used alone cooling water tank fountain cooling system, be difficult to resist melt sagging due to Action of Gravity Field.
Therefore, a kind of preparation technology for PE super large caliber thick-wall tube of design is needed badly.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of preparation technology of PE super large caliber thick-wall tube.
Technical scheme of the present invention is as follows:
A preparation technology for PE super large caliber thick-wall tube, comprises the following steps,
(1) by weight, get raw material high density polyethylene (HDPE) 100 parts, black master batch 2-6 part, mix, obtain mixed material;
(2) by the mixed material that step (1) obtains, dry more than 30 minutes at 80-90 DEG C, then mixed material is put into high-speed mixer and mix, and squeeze into dry feed bin be cooled to 25-45 DEG C in mixer after;
(3) mixed material in dry feed bin is delivered to hopper, enter extruder by hopper to extrude, obtain tubing, the technological parameter extruded is as follows: extruder body temperature: 230-190 DEG C, merging core temperature: 230-190 DEG C in extruder, the head temperature of extruder: 190-230 DEG C; The engine speed of extruder: 20-100 rev/min;
(4) tubing step (3) obtained is by vacuum water tank porch calibration sleeve sizing, then vacuum cooled sizing is carried out, inner to tubing Air flow at head while vacuum cooled sizing, then cool further through water tank spray after tubing goes out vacuum water tank, obtain shaping pipe;
(5) shaping pipe fixed length cutting step (4) obtained, coding, packaging.
Preferably, in step (1), the water content < 0.05% of described high density polyethylene (HDPE); The water content < 0.05% of described black master batch.
Preferred further, in step (1), before batch mixing, respectively moisture detection is carried out to raw material high density polyethylene (HDPE) and black master batch, when water content >=0.05%, use materal drier to dry raw material.
Preferably, in step (3), the mixed material in dry feed bin is delivered to hopper by vacuum automatic charging machine.The advantage of this design is, is carried out the conveying of mixed material by vacuum automatic charging machine, effectively can ensure the impact of mixed material not by external environment in running, keep away from moisture, contaminated.
Preferably, in step (3), the head of described extruder comprises the mouth mould, mouth die holder, calibration sleeve, core, handpiece body and the connector that connect successively; Described mouth mould is placed in a mouthful die holder, the both sides of described handpiece body are provided with adjustment screw, the connector described in end installation of described handpiece body, the inside of described handpiece body is provided with air flow channel, and described air flow channel is stretched out by the side of handpiece body end and to be connected with the outlet pipe of outside.
Preferably, the bilateral symmetry of described handpiece body is provided with two outlet pipes, described two outlet pipes are all connected with air flow channel.
Preferred further, in described air flow channel, the flow direction of air is contrary with the direction of tube extrusion in head.The advantage of this design is, by the end air intake cooling pipe material inner wall from extruding pipe material, make the flow direction of cooling-air contrary with the direction of tube extrusion, outer pipe wall is by vacuum sizing spraying cooling simultaneously, make tubing inside cool in this approach simultaneously, thus make tube forming.Tubing is from going out die head position, and inside and outside wall just starts to cool simultaneously, and the wall thickness deviation that unlikely melt gravity sag causes is irregular very greatly, and cools the overproof problem of out-of-roundness enough do not caused not in time.
Preferably, in step (1), described high density polyethylene (HDPE) selects extrusion grade high density polyethylene (HDPE), melt mass flow rate at 0.2-0.4g/10min, sag resistant property resin.
Beneficial effect of the present invention is:
Preparation technology of the present invention is based in original production technology mode, increase inner air cooling, air-flow direction is contrary with tubing production mode reform, to increase the cooling effect of tubing, make tubing inside cool in this approach simultaneously, prevent from weakening melt gravity sag and cool the overproof problem of out-of-roundness enough do not caused not in time, and can ensure that the least possible heat of head is taken away by air, ensure that head internal temperature is even, and save electricity consumption, raising energy efficiency.Preparation technology of the present invention and the improved technology equipment used by this technique thereof, rational technology, equipment are reliable, and Be very effective, has good economic benefit and market value, be worthy of popularization.
Accompanying drawing explanation
Fig. 1 is the handpiece structure schematic diagram in the present invention after extruder improvement;
Fig. 2 is the head principle schematic in the present invention after extruder improvement;
Fig. 3 is the process chart of preparation technology of the present invention.
Wherein: 1, cross-head; 2, outlet pipe; 3, head feed pipe; 4, air flow channel; 5, tubing.
Detailed description of the invention
Below by embodiment, also the present invention will be further described by reference to the accompanying drawings, but be not limited thereto.
Embodiment 1:
The present embodiment provide one to prepare preparation technology that bore is the polyvinyl piping materials of DN1600 × 94.11.0MPa, its processing step is as follows:
(1) prepare burden: by weight, get raw material high density polyethylene (HDPE) 100 parts, black master batch 2 parts, high density polyethylene (HDPE), black master batch are mixed, 80-90 DEG C of oven dry, and keep more than 30 minutes in this temperature range.Select high density polyethylene (HDPE) melt mass flow rate at 0.26-0.4g/10min, sag resistant property resin.
(2) extrude: the mixed material that step (1) obtains is delivered to hopper from dry feed bin by vacuum automatic charging machine, puts into extruder extruding pipe material, extruder head used is the head after improving, as illustrated in figs. 1 and 2; The technological parameter extruded is as follows: extruder body temperature: 230-190 DEG C, merging core temperature: 230-190 DEG C in extruder, the head temperature of extruder: 190-230; The engine speed of extruder: 20 revs/min, raw material is plastified by hopper, is transported to mould;
(3) cooling and shaping: by the tubing extruded in step (2) by vacuum water tank porch calibration sleeve sizing, vacuum cooled sizing is simultaneously inner to tubing Air flow at head, air flow is contrary with the direction of tube extrusion in head, cool further through water tank spray after tubing goes out vacuum water tank, such tubing from go out die head position inside and outside wall just cool simultaneously, the wall thickness deviation that unlikely melt gravity sag causes is irregular very greatly, and cool the overproof problem of out-of-roundness enough do not caused not in time, finally obtain shaping pipe.
(4) fixed length cutting, coding: shaping pipe spray printing, fixed length cutting, packaging that step (3) is obtained.
Wherein, before step (1) batch mixing, need to carry out moisture detection respectively to raw material high density polyethylene (HDPE) and black master batch, when water content >=0.05%, use materal drier to dry raw material.
In step (3), the cross-head after improvement comprises the mouth mould, mouth die holder, calibration sleeve, core, handpiece body and the connector that connect successively; Described mouth mould is placed in a mouthful die holder, the both sides of described handpiece body are provided with adjustment screw, the connector described in end installation of described handpiece body, the inside of described handpiece body is provided with air flow channel, and described air flow channel is stretched out by the side of handpiece body end and to be connected with the outlet pipe of outside.The bilateral symmetry of described handpiece body is provided with two outlet pipes, and described two outlet pipes are all connected with air flow channel.In air flow channel, the flow direction of air is contrary with the direction of tube extrusion in head.Whole technical process as shown in Figure 3.
Embodiment 2:
The present embodiment provide one to prepare preparation technology that bore is the polyvinyl piping materials of DN1600 × 94.11.0MPa, processing step as described in Example 1, its difference is: in step (1), get black master batch 6 parts to mix with high density polyethylene (HDPE) 100 parts, 80-90 DEG C of oven dry, and keep more than 60 minutes in this temperature range; In step (2), engine speed: 100 revs/min.
Embodiment 3:
The present embodiment provide one to prepare preparation technology that bore is the polyvinyl piping materials of DN1400 × 82.41.0MPa, its processing step is as follows:
(4) prepare burden: by weight, get raw material high density polyethylene (HDPE) 100 parts, black master batch 2 parts, high density polyethylene (HDPE), black master batch are mixed, 80-90 DEG C of oven dry, and keep more than 30 minutes in this temperature range.Select high density polyethylene (HDPE) melt mass flow rate at 0.26-0.4g/10min, sag resistant property resin.
(5) extrude: the mixed material that step (1) obtains is delivered to hopper from dry feed bin by vacuum automatic charging machine, puts into extruder extruding pipe material, extruder head used is the head after improving, as illustrated in figs. 1 and 2; The technological parameter extruded is as follows: extruder body temperature: 230-190 DEG C, merging core temperature: 230-190 DEG C in extruder, the head temperature of extruder: 190-230; The engine speed of extruder: 20 revs/min, raw material is plastified by hopper, is transported to mould;
(6) cooling and shaping: by the tubing extruded in step (2) by vacuum water tank porch calibration sleeve sizing, vacuum cooled sizing is simultaneously inner to tubing Air flow at head, air flow is contrary with the direction of tube extrusion in head, cool further through water tank spray after tubing goes out vacuum water tank, such tubing from go out die head position inside and outside wall just cool simultaneously, the wall thickness deviation that unlikely melt gravity sag causes is irregular very greatly, and cool the overproof problem of out-of-roundness enough do not caused not in time, finally obtain shaping pipe.
(4) fixed length cutting, coding: shaping pipe spray printing, fixed length cutting, packaging that step (3) is obtained.
Wherein, before step (1) batch mixing, need to carry out moisture detection respectively to raw material high density polyethylene (HDPE) and black master batch, when water content >=0.05%, use materal drier to dry raw material.
In step (3), the cross-head after improvement comprises the mouth mould, mouth die holder, calibration sleeve, core, handpiece body and the connector that connect successively; Described mouth mould is placed in a mouthful die holder, the both sides of described handpiece body are provided with adjustment screw, the connector described in end installation of described handpiece body, the inside of described handpiece body is provided with air flow channel, and described air flow channel is stretched out by the side of handpiece body end and to be connected with the outlet pipe of outside.The bilateral symmetry of described handpiece body is provided with two outlet pipes, and described two outlet pipes are all connected with air flow channel.In air flow channel, the flow direction of air is contrary with the direction of tube extrusion in head.Whole technical process as shown in Figure 3.
Embodiment 4:
The present embodiment provide one to prepare preparation technology that bore is the polyvinyl piping materials of DN1400 × 82.41.0MPa, processing step as described in Example 3, its difference is: in step (1), get black master batch 6 parts to mix with high density polyethylene (HDPE) 100 parts, 80-90 DEG C of oven dry, and keep more than 60 minutes in this temperature range; In step (2), engine speed: 100 revs/min.
Claims (8)
1. a preparation technology for PE super large caliber thick-wall tube, comprises the following steps,
(1) by weight, get raw material high density polyethylene (HDPE) 100 parts, black master batch 2-6 part, mix, obtain mixed material;
(2) by the mixed material that step (1) obtains, dry more than 30 minutes at 80-90 DEG C, then mixed material is put into high-speed mixer and mix, and squeeze into dry feed bin be cooled to 25-45 DEG C in mixer after;
(3) mixed material in dry feed bin is delivered to hopper, enter extruder by hopper to extrude, obtain tubing, the technological parameter extruded is as follows: extruder body temperature: 230-190 DEG C, merging core temperature: 230-190 DEG C in extruder, the head temperature of extruder: 190-230 DEG C; The engine speed of extruder: 20-100 rev/min;
(4) tubing step (3) obtained is by vacuum water tank porch calibration sleeve sizing, then vacuum cooled sizing is carried out, inner to tubing Air flow at head while vacuum cooled sizing, then cool further through water tank spray after tubing goes out vacuum water tank, obtain shaping pipe;
(5) shaping pipe fixed length cutting step (4) obtained, coding, packaging.
2. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 1, is characterized in that, in step (1), and the water content < 0.05% of described high density polyethylene (HDPE); The water content < 0.05% of described black master batch.
3. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 2, is characterized in that, in step (1), before batch mixing, respectively moisture detection is carried out to raw material high density polyethylene (HDPE) and black master batch, when water content >=0.05%, uses materal drier to dry raw material.
4. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 1, is characterized in that, in step (3), the mixed material in dry feed bin is delivered to hopper by vacuum automatic charging machine.
5. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 1 or 2, it is characterized in that, in step (3), the head of described extruder comprises the mouth mould, mouth die holder, calibration sleeve, core, handpiece body and the connector that connect successively; Described mouth mould is placed in a mouthful die holder, the both sides of described handpiece body are provided with adjustment screw, the connector described in end installation of described handpiece body, the inside of described handpiece body is provided with air flow channel, and described air flow channel is stretched out by the side of handpiece body end and to be connected with the outlet pipe of outside.
6. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 5, it is characterized in that, the bilateral symmetry of described handpiece body is provided with two outlet pipes, described two outlet pipes are all connected with air flow channel.
7. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 6, it is characterized in that, in described air flow channel, the flow direction of air is contrary with the direction of tube extrusion in head.
8. the preparation technology of PE super large caliber thick-wall tube as claimed in claim 1 or 2, it is characterized in that, in step (1), described high density polyethylene (HDPE) selects extrusion grade high density polyethylene (HDPE), melt mass flow rate at 0.2-0.4g/10min, sag resistant property resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134061.1A CN104760261B (en) | 2015-03-25 | 2015-03-25 | A kind of preparation technology of PE super large calibers thick-wall tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134061.1A CN104760261B (en) | 2015-03-25 | 2015-03-25 | A kind of preparation technology of PE super large calibers thick-wall tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104760261A true CN104760261A (en) | 2015-07-08 |
| CN104760261B CN104760261B (en) | 2017-08-25 |
Family
ID=53642517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510134061.1A Active CN104760261B (en) | 2015-03-25 | 2015-03-25 | A kind of preparation technology of PE super large calibers thick-wall tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104760261B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476243A (en) * | 2016-10-20 | 2017-03-08 | 南阳森源塑胶有限公司 | The anti-pore production technology of coloured PE tubing |
| CN107418015A (en) * | 2016-05-24 | 2017-12-01 | 天津市明志实业发展有限公司 | A kind of superhigh molecular weight polyethylene idler overcoat pipe processing technique |
| CN111890662A (en) * | 2020-07-01 | 2020-11-06 | 深圳市沃尔核材股份有限公司 | Synchronous extrusion system and method of multi-pipe extruder |
| CN114523644A (en) * | 2022-02-16 | 2022-05-24 | 公元管道(安徽)有限公司 | Polyethylene large-caliber solid-wall pipe forming die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000071010A (en) * | 1998-08-28 | 2000-03-07 | Hitachi Cable Ltd | Continuous pipe extruding equipment |
| CN101775180A (en) * | 2009-12-29 | 2010-07-14 | 山东华信塑胶股份有限公司 | Impact-resistant modified polyvinyl chloride tube material and preparation process thereof |
| CN103360659A (en) * | 2012-04-03 | 2013-10-23 | 李胜春 | High-performance high-density polyethylene (HDPE) pipe fitting |
| CN103568240A (en) * | 2013-07-17 | 2014-02-12 | 扬州巨业耐磨复合材料有限责任公司 | Extruding and forming method of polyethylene pipe for water supply |
-
2015
- 2015-03-25 CN CN201510134061.1A patent/CN104760261B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000071010A (en) * | 1998-08-28 | 2000-03-07 | Hitachi Cable Ltd | Continuous pipe extruding equipment |
| CN101775180A (en) * | 2009-12-29 | 2010-07-14 | 山东华信塑胶股份有限公司 | Impact-resistant modified polyvinyl chloride tube material and preparation process thereof |
| CN103360659A (en) * | 2012-04-03 | 2013-10-23 | 李胜春 | High-performance high-density polyethylene (HDPE) pipe fitting |
| CN103568240A (en) * | 2013-07-17 | 2014-02-12 | 扬州巨业耐磨复合材料有限责任公司 | Extruding and forming method of polyethylene pipe for water supply |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418015A (en) * | 2016-05-24 | 2017-12-01 | 天津市明志实业发展有限公司 | A kind of superhigh molecular weight polyethylene idler overcoat pipe processing technique |
| CN106476243A (en) * | 2016-10-20 | 2017-03-08 | 南阳森源塑胶有限公司 | The anti-pore production technology of coloured PE tubing |
| CN111890662A (en) * | 2020-07-01 | 2020-11-06 | 深圳市沃尔核材股份有限公司 | Synchronous extrusion system and method of multi-pipe extruder |
| CN114523644A (en) * | 2022-02-16 | 2022-05-24 | 公元管道(安徽)有限公司 | Polyethylene large-caliber solid-wall pipe forming die |
| CN114523644B (en) * | 2022-02-16 | 2023-12-26 | 公元管道(安徽)有限公司 | Polyethylene large-caliber solid wall pipe forming die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104760261B (en) | 2017-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103786324A (en) | Process for producing double-wall corrugated pipe | |
| CN101352916B (en) | Method for producing heat-resisting polyethylene tube | |
| CN103395183B (en) | The manufacturing equipment of a kind of biaxial-orienting PVC and polyolefine material tubing and processing condition and method thereof | |
| CN104760261A (en) | Preparation process of PE (Poly Ethylene) ultra-large-diameter thin-wall pipe material | |
| CN103770308B (en) | Irrigate with double-deck PE pipe preparation method and equipment thereof | |
| CN105754215A (en) | Manufacturing method of PP (polypropylene) double-wall corrugated pipe | |
| CN106589585A (en) | High strength polypropylene (PP-HM) double-wall corrugated pipe and production technology | |
| CN102672934B (en) | Production method of buried cracking-resistant polyethylene pipeline for fuel gas | |
| CN1986626A (en) | No-blocking filtering irrigation rubber-plastic pipe and its production process | |
| CN1095533C (en) | Metal pipe with heat-insulating foamed plastic coating and its manufacture | |
| CN203994736U (en) | Pvc pipe material modification on-line continuous production line | |
| CN103707482B (en) | Possesses high-strength and high oxygen polyolefin pipe and preparation method thereof simultaneously | |
| CN101844384A (en) | Preparation method of large-caliber plastic pipe | |
| CN111347699A (en) | Preparation method of PE water supply pipe | |
| CN107351354B (en) | Tube extruding machine head of three-layer plastic composite tube with middle layer fiber oriented along circumferential direction | |
| CN204036802U (en) | The single-screw extruder of threaded machine barrel | |
| CN209937615U (en) | Screw type plastic extrusion device for manufacturing peroxide crosslinked polyethylene pipe | |
| CN114474643A (en) | Production equipment and process of ultrathin high-polymer pipe | |
| CN208774020U (en) | Heavy wall pipe and bar integrated production equipment | |
| CN106243552A (en) | A kind of PVC O reducer pipe production technology | |
| CN112724552A (en) | PVC-M impact-resistant pipe and preparation method thereof | |
| CN101249717A (en) | Method and equipment for manufacturing fire engine hose | |
| CN206883866U (en) | A kind of extrusion die of ultralight clay extruder | |
| CN103923375A (en) | Special pipe for spray pump and production method of special pipe | |
| CN104387649B (en) | Special shrinkage-cavity prevention material for thick-wall PE (polyethylene) pipe and method for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |