CN105014919A - Single screw extruder of pure ultrahigh molecular weight polyethylene material - Google Patents
Single screw extruder of pure ultrahigh molecular weight polyethylene material Download PDFInfo
- Publication number
- CN105014919A CN105014919A CN201410154424.3A CN201410154424A CN105014919A CN 105014919 A CN105014919 A CN 105014919A CN 201410154424 A CN201410154424 A CN 201410154424A CN 105014919 A CN105014919 A CN 105014919A
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- screw
- molecular weight
- groove
- screw rod
- weight polyethylene
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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
- B29C48/68—Barrels or cylinders
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
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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 single screw extruder of a pure ultrahigh molecular weight polyethylene material. The single screw extruder is mainly composed of a feeding device, a cylinder, a screw, a motor and a transmission device, etc. The cylinder is a sectional type structure. A feeding section part is provided with a detachable neck bush. The neck bush and a screw feeding section have equal length. The inner wall of the neck bush is provided with multi-start helical grooves. The rotation direction of the helical grooves is opposite to the rotation direction of screw channels. The screw adopts a four-section parameter design. A compression section is designed to have two sections with different lengths. The overall compression ratio is designed to be 2-3. The feeding section is designed to be a two-start screw structure. By matching optimization design of cylinder neck bush parameters and screw geometry parameters, the single screw extruder can carry out positive displacement conveying. Thus, the continuous extrusion machining problem of high-viscosity low-friction-coefficient materials such as ultrahigh molecular weight polyethylene is fundamentally solved, and the pure ultrahigh molecular weight polyethylene material can be directly added to be extruded without adding any processing agents. Viscosity average molecular weight can reach 3,000,000-9,200,000. When a special extrusion die is equipped, pipes, profile shapes and bar products of different specifications can be produced continuously.
Description
Technical field
The present invention relates to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder, can be used for the continuous extrusion of the goods such as high molecular weight polyethylene board material, tubing, bar, profile shapes, molecular weight is unrestricted.
Background technology
Ultra-high molecular weight polyethylene (UHMWPE) typically refers to the linear structure polyethylene of viscosity average molecular weigh more than 1,500,000, the linear polyethylene of weight average molecular weight more than 3,000,000, its molecular structure and common polythene are substantially identical, but physical and mechanical properties is considerably beyond common polythene, particularly its resistance to impact, mar proof, chemical resistance, self lubricity and these five characteristics of absorption impact energy are then best in current all plastics.But its viscosity is high, almost there is no mobility, critical shear rate is lower, coefficient of friction is extremely low causes extruding and feeding difficulty, in for a long time, the processing of ultra-high molecular weight polyethylene is only limitted to suppress a sintering or plunger extrusion molding method is main small lot batch manufacture, and production efficiency is low, how to realize high-efficiency and continuous processing ultra-high molecular weight polyethylene, be the problem that countries in the world fall over each other to study always.Traditional single screw extrusion machine Solid Conveying and Melting mechanism is friction towing conveying, in friction towing conveying, when screw rod rotates, solid plug can be regarded as along screw channel direction around " nut " that screw rod rotates, therefore solid plug can be regarded as " nut model " relative to screw motion model, in " nut model ", barrel surface is power to " nut " frictional force, screw surface is resistance to " nut " frictional force, when rotating for preventing screw rod, " nut " is stagnated in barrel surface skidding and is fed forward, barrel surface frictional force must be made to be greater than screw surface frictional force, to guarantee that material is effectively fed forward, as patent document CN201357555Y, CN201224168Y etc.The shortcoming of friction towing conveying mainly comprises: (l) requires harsh to material performance, be difficult to the steady extruding realizing high viscosity, low-friction coefficient material; (2) solid conveying section upbuild voltage capacity is poor, is reverse pressure system along screw axial, and between machine barrel and screw rod, gap causes larger leakage current; (3) transfer efficiency is low, and the serious wear between machine barrel and screw rod, specific energy consumption is larger.Notification number is that JP 1 one 38658 patent document set forth a kind of UHMWPE Single Screw extruder barrel feeding section and is provided with water-cooling jacket, and offer along extruding direction at inner surface and shoal gradually, until the last groove disappeared, screw rod is syllogic, divide feeding section, compression section and metering section, this invention weak point is that the machine barrel of extruder and screw-rod structure parameter are not integrally carry out matched design, positive conveyance cannot be realized, material is fed forward by friction towing mechanism, easily block in the compression section of feeding section and machine barrel, and the shape and size of groove can not dismounting and change, the molecular weight of the ultra-high molecular weight polyethylene raw material of processing is restricted.Summary of the invention the object of the invention is to overcome the deficiencies in the prior art, a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder is provided, what effective solution utilized the high viscositys such as ultra-high molecular weight polyethylene, low-friction coefficient material extrudes processing problems, realize the high-efficiency and continuous of ultra-high molecular weight polyethylene stable extrude processing.To achieve these goals, this invention takes following technical scheme: a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder, comprise machine barrel, screw rod, motor and transmission device, it is characterized in that: in the feeding section of described machine barrel, removable lining is installed, lining and screw rod feeding section isometric, its inwall offers multi-head spiral groove, and the rotation direction of spiral grooves is contrary with screw channel rotation direction; Described groove spiral shell rib pressure surface, groove spiral shell rib rear surface, screw rod spiral shell rib pressure surface and screw rod spiral shell rib rear surface surround semi-enclosed storage compartment; When screw rod rotates, under the promotion of groove spiral shell rib pressure surface and screw rod spiral shell rib pressure surface, storage compartment travels forward along described barrel liner groove direction, and then material is fed forward along barrel liner groove direction in promotion storage compartment, realize the mass transport under groove spiral shell rib pressure surface and the effect of screw rod spiral shell rib pressure surface double-flight driving.
The lining having multi-head spiral groove is adopted to be bumped into machine barrel feeding section inwall, this version is convenient to the groove changing difformity and size, meet different molecular weight, different-grain diameter ultra-high molecular weight polyethylene raw material extrude processing, prevent powder circumference from skidding, improve the charging ability of extruder.Groove shape can be rectangle, trapezoidal or triangle.
The ditch trough number of barrel liner is the 10%-25 % of screw diameter, and gash depth is the 5%-15 % of screw diameter, and ditch groove width is 1.5-6 times of ditch groove depth, and groove lead angle is 30-90 degree.The number of starts of screw rod feeding section is designed to double end, screw rod feeding section screw channel is the 5%-15 % of screw diameter deeply, screw rod feeding section pitch is 0.5-1.5 screw diameter doubly, screw rod such as material section lead angle is 10 degree of-25 degree, increase material conveying propulsive force forward, be detained in case material skids at feeding section.
Adopt four-part form screw rod, the compression section of screw rod is divided into the Liang Ge district that compression ratio is different, i.e. the first compression section and the second compression section, first paragraph compression is smaller, and the second compression section length is 1.5-2 times of the first compression section, make material in compression section by slowly compression, both be conducive to the degassed of material, and improved the compactness of goods, avoid again material to block in compression section, first compression section compression ratio design is less than the second compression section, and overall compression ratio controls at 2-3.
A kind of ultra-high molecular weight polyethylene of the present invention pure material single-screw extruder extruder compared with prior art, the present invention has the following advantages: (l) is all based upon on positive conveyance mechanism because of these methods or structure, material entirety under the common thrust of groove spiral shell rib and screw rod spiral shell rib is fed forward, can realize extruding the stable conveying of high viscosity, low-friction coefficient material, the conveying capacity of extruder significantly improves; (2) material is in course of conveying, avoid solid plug and be subject to strong interlayer shear and interior slip, barrel liner inwall and screw surface are smooth machined surface simultaneously, and frictional force reduces greatly, and cover wearing and tearing are little, specific energy consumption reduces to cause the machine barrel of solid conveying section to feed in raw material; (3) be positive pressure system along screw axial, during extruded product, pressure oscillation is little, and extrude stable, quality of item is high; (4) can not add in processing aid situation, process other ultra-high molecular weight polyethylene raw material of any molecular level, realize charging continous-stable, non-slip, not seize, plasticizing quality is excellent.
Description of drawings 1 is cylinder liner cover sectional view of the present invention; Fig. 2 is mass transport illustraton of model of the present invention.In figure: 1 is groove spiral shell rib pressure surface; 2 is groove spiral shell rib rear surface; 3 is screw rod spiral shell rib pressure surface; 4 is screw rod spiral shell rib rear surface; 5 is storage compartment; 6 is barrel liner groove; 7 is barrel liner; 8 is screw rod feeding section; 9 is screw channel;
Below in conjunction with Figure of description, specific embodiments of the invention are illustrated.
Refer to shown in Fig. 1, be cylinder liner cover sectional view of the present invention, as can be seen from the figure, 6 is barrel liner groove; 7 is barrel liner; 8 is screw rod feeding section; 9 is screw channel.Referring to shown in Fig. 2, is mass transport illustraton of model of the present invention, and 1 is groove spiral shell rib pressure surface; 2 is groove spiral shell rib rear surface; 3 is screw rod spiral shell rib pressure surface; 4 is screw rod spiral shell rib rear surface; 5 is storage compartment.First embodiment: this example processes raw material as 200-300 ten thousand ultra-high molecular weight polyethylene raw material, screw diameter 90mm, draw ratio 25, number of starts 2, dextrorotation, the dark 10mm of feeding section screw channel, reinforced segment length 450mm, pitch equals 0.8 cylinder bore, the first compression segment length 350mm, compression ratio 1.5; Second compression segment length 600mm, compression ratio is 1.8, and overall compression ratio is 2.7; Screw speed 3Or/min, driving power 37KW, barrel liner groove is left-handed, helical angle 50 degree, groove number 12, ditch groove depth 8mm, ditch groove width 16mm.Mass transport operation principle of the present invention is as being shown in Fig. 2, semiclosed storage compartment 5 is surrounded by groove spiral shell rib pressure surface 1, groove spiral shell rib rear surface 2, screw rod spiral shell rib pressure surface 3 and screw rod spiral shell rib rear surface 4, storage compartment 5 top view is parallelogram, parallelogram drift angle is angle between barrel liner groove 6 and screw channel 9, and storage compartment 5 highly equals ditch groove depth and the dark sum of screw channel.When bolt rotary, high density polyethylene (HDPE) material in storage compartment 5 is under the acting in conjunction of groove spiral shell rib pressure surface 1 and screw rod spiral shell rib pressure surface 3, be fed forward along barrel liner groove 6 helical angle, owing to there is interlayer shear and interior slip at barrel liner 7 with screw rod feeding section 8 interface place in the solid plug avoided in storage compartment 5, can realize the positive conveyance of solid plug under the acting in conjunction of machine barrel groove spiral shell rib pressure surface 1 thrust and screw rod spiral shell rib pressure surface 3 thrust, when extruding, maximum output can reach 40 1 50kg/h.Second embodiment: it is 400 1 500 ten thousand ultra-high molecular weight polyethylene raw materials that this example processes raw material, screw diameter 45mm, draw ratio 25, number of starts 2, dextrorotation, the dark 4mm of feeding section screw channel, reinforced long 270mm, pitch equals cylinder bore, the first compression segment length 150mm, compression ratio 1.5; Second compression segment length 300mm, compression ratio is 2, and overall compression ratio is 3, screw speed 20r/min, driving power 7.5Kw, and barrel liner groove is left-handed, helical angle 55 degree, groove number 8, ditch groove depth 5mm, ditch groove width 9mm.
Mass transport operation principle of the present invention is as being shown in Fig. 2, and semiclosed storage compartment 5 is surrounded by groove spiral shell rib pressure surface 1, groove spiral shell rib rear surface 2, screw rod spiral shell rib pressure surface 3 and screw rod spiral shell rib rear surface 4.Storage compartment 5 top view is parallelogram, and parallelogram drift angle is angle between barrel liner groove 6 and screw channel 9.Storage compartment 5 highly equals ditch groove depth and the dark sum of screw channel.When bolt rotary, the low density polyethylene (LDPE) material in storage compartment 5, under the acting in conjunction of groove spiral shell rib pressure surface 1 and screw rod spiral shell rib pressure surface 3, is fed forward along barrel liner groove 6 helical angle.There is interlayer shear and interior slip at barrel liner 7 with screw rod feeding section 8 interface place owing to avoiding solid plug in storage compartment 5, the positive conveyance of solid plug under the acting in conjunction of machine barrel groove spiral shell rib pressure surface 1 thrust and screw rod spiral shell rib pressure surface 3 thrust can be realized.When extruding, maximum output can reach 10-15Kg/h.
The present invention can summarize with other the concrete form without prejudice to spirit of the present invention or principal character, therefore no matter from which point, above-mentioned embodiment of the present invention all can only be thought explanation of the present invention and can not limit the present invention, claims indicate scope of the present invention, therefore, suitable with claims of the present invention contains and any change in scope, all should think to be included in the scope of claims.
Claims (6)
1. a ultra-high molecular weight polyethylene pure material single-screw extruder extruder, comprise machine barrel, screw rod, motor and transmission device, it is characterized in that: in the feeding section of described machine barrel, removable lining is installed, lining and screw rod feeding section isometric, lining inwall offers multi-head spiral groove, and the rotation direction of spiral grooves is contrary with screw channel rotation direction; Described groove spiral shell rib pressure surface, groove spiral shell rib rear surface, screw rod spiral shell rib pressure surface and screw rod spiral shell rib rear surface surround semi-enclosed storage compartment; When screw rod rotates, under the promotion of groove spiral shell rib pressure surface and screw rod spiral shell rib pressure surface, storage compartment travels forward along described barrel liner groove direction, and then material is fed forward along barrel liner groove direction in promotion storage compartment, realize the mass transport under groove spiral shell rib pressure surface and the effect of screw rod spiral shell rib pressure surface double-flight driving.
2. according to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder described in claim 1, it is characterized by: described ditch trough number is the 10-25 % of screw diameter, gash depth is the 5-15% of screw diameter, ditch groove width is 1.5-5 times of ditch groove depth, and groove lead angle is 30-90 degree.
3. according to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder described in claim 1, it is characterized by: screw rod feeding section number of starts is double end, feeding section groove depth is the 5-15 % of screw diameter, feeding section pitch is 0.5-1.5 times of screw diameter, and feeding section lead angle is 10-25 degree.
4. according to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder described in claim 1, it is characterized by: screw rod adopts four-part form design, has two sections of compressional zones, the second compressional zone length is 1.5-2 times of the first compressional zone, and overall compression is than being 2-3.
5. according to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder described in claim 1, it is characterized by: groove shape can be rectangle, trapezoidal or triangle.
6., according to a kind of ultra-high molecular weight polyethylene pure material single-screw extruder extruder described in claim 1, it is characterized by: storage compartment is parallelogram shape.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154424.3A CN105014919A (en) | 2014-04-17 | 2014-04-17 | Single screw extruder of pure ultrahigh molecular weight polyethylene material |
| PCT/CN2015/076762 WO2015158282A1 (en) | 2014-04-17 | 2015-04-16 | Single screw extruder for extrusion of pure materials of ultra-high-molecular-weight polyethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154424.3A CN105014919A (en) | 2014-04-17 | 2014-04-17 | Single screw extruder of pure ultrahigh molecular weight polyethylene material |
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| Publication Number | Publication Date |
|---|---|
| CN105014919A true CN105014919A (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410154424.3A Pending CN105014919A (en) | 2014-04-17 | 2014-04-17 | Single screw extruder of pure ultrahigh molecular weight polyethylene material |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105014919A (en) |
| WO (1) | WO2015158282A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026401A (en) * | 2019-12-25 | 2021-06-25 | 曲阜市海华高科技有限公司 | Method for compounding ultrahigh molecular weight polyethylene film with PTFE film and then twisting and cord manufactured by using method |
| CN113694565A (en) * | 2021-09-02 | 2021-11-26 | 上海盛普机械制造有限公司 | Defoaming device with sectional type screw and ceramic bushing and defoaming method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693361B (en) * | 2017-09-13 | 2024-04-26 | 北京化工大学 | Preparation facilities of high-efficient slowly-releasing nano-drug |
Citations (5)
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|---|---|---|---|---|
| CN1115280A (en) * | 1994-07-18 | 1996-01-24 | 北京化工大学 | Extruding shaper for superhigh molecular weight polymer |
| CN2227016Y (en) * | 1995-08-18 | 1996-05-15 | 中国石油化工总公司 | Single screw arbor extrusion machine |
| CN2351265Y (en) * | 1998-01-16 | 1999-12-01 | 刘资丰 | Super high molecular weight polytene extrusion apparatus |
| CN102152464A (en) * | 2010-11-19 | 2011-08-17 | 北京化工大学 | Single screw extruder on basis of double screw edge push conveying |
| CN204278477U (en) * | 2014-04-17 | 2015-04-22 | 奥卓海（上海）机械有限公司 | Ultra-high molecular weight polyethylene pure material single-screw extruder extruder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252885B (en) * | 2012-02-16 | 2015-04-15 | 北京化工大学 | Grooved-barrel extruder based on radial fusion |
| CN102990899A (en) * | 2012-09-28 | 2013-03-27 | 武汉工程大学 | Forming method and equipment of macromolecular material profile by using single-screw extrusion cylinder |
-
2014
- 2014-04-17 CN CN201410154424.3A patent/CN105014919A/en active Pending
-
2015
- 2015-04-16 WO PCT/CN2015/076762 patent/WO2015158282A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115280A (en) * | 1994-07-18 | 1996-01-24 | 北京化工大学 | Extruding shaper for superhigh molecular weight polymer |
| CN2227016Y (en) * | 1995-08-18 | 1996-05-15 | 中国石油化工总公司 | Single screw arbor extrusion machine |
| CN2351265Y (en) * | 1998-01-16 | 1999-12-01 | 刘资丰 | Super high molecular weight polytene extrusion apparatus |
| CN102152464A (en) * | 2010-11-19 | 2011-08-17 | 北京化工大学 | Single screw extruder on basis of double screw edge push conveying |
| CN204278477U (en) * | 2014-04-17 | 2015-04-22 | 奥卓海（上海）机械有限公司 | Ultra-high molecular weight polyethylene pure material single-screw extruder extruder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026401A (en) * | 2019-12-25 | 2021-06-25 | 曲阜市海华高科技有限公司 | Method for compounding ultrahigh molecular weight polyethylene film with PTFE film and then twisting and cord manufactured by using method |
| CN113694565A (en) * | 2021-09-02 | 2021-11-26 | 上海盛普机械制造有限公司 | Defoaming device with sectional type screw and ceramic bushing and defoaming method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015158282A1 (en) | 2015-10-22 |
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Application publication date: 20151104 |