CN103350500A - Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) - Google Patents
Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) Download PDFInfo
- Publication number
- CN103350500A CN103350500A CN2013103152162A CN201310315216A CN103350500A CN 103350500 A CN103350500 A CN 103350500A CN 2013103152162 A CN2013103152162 A CN 2013103152162A CN 201310315216 A CN201310315216 A CN 201310315216A CN 103350500 A CN103350500 A CN 103350500A
- Authority
- CN
- China
- Prior art keywords
- machine barrel
- molecular weight
- weight polyethylene
- uhmwpe
- extruding
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene), and aims to solve the problems of high viscosity, poor fluidity, and susceptibility to fracture and degradation during the manufacturing process of the UHMWPE. The machine barrel of an extruder adopts a groove machine barrel; pins are arranged on the machine barrel; a copper sheathing is mounted around each pin. The extruder machine barrel provided by the invention can increase the friction between material and the machine barrel to guarantee strong forward transportation capacity, and is easy to plasticize and mix; the pins can be replaced conveniently; the copper sheathings outside the pins can achieve the functions of sealing, positioning and adjustment, so as to increase the extruding efficiency of the extruder and the mass of the UHMWPE.
Description
Technical field
The present invention relates to a kind of machine barrel of extruding ultrahigh molecular weight polyethylene.
Background technology
Ultra-high molecular weight polyethylene (Ultra-High Molecular Weight Polyethylene UHMWPE) was at first succeeded in developing with Ziegler catalyst by U.S. Unichem in nineteen fifty-seven.This is a kind of line polymer, and molecular weight is usually 1,000,000-5,000,000, and degree of crystallinity is 65-85%, and density is 0.92-0.96g/cm
3Compare with numerous polymeric materials, UHMWPE has the advantages that coefficient of friction is little, abrasion are low, chemical resistance is good, but also has the good characteristics such as shock-resistant, resistance to pressure, frost resistance, heat insulating ability, self lubricity, ant-scaling, stress cracking resistance, wholesomeness.These good characteristics make UHMWPE tubing have important practical value.Be described as " the novel thermoplastic engineering material that is emerging rapidly ", in various fields, have important practical value.
At present, when ultra-high molecular weight polyethylene being produced the plastic products such as various tubing, sheet material, profile shapes as raw material, extrusion by melting and mould forming method have usually been adopted.So-called extrusion by melting refers to: the raw material that enters extruding machine barrel is extruded behind conveying, compacting, the fusion plastification realizing under the effect of screw rod, and the material of extruding enters die for molding again.As everyone knows, the UHMWPE molecular weight is unordered entanglement between the extraordinary strand up to millions of, and its molecule segment shows as melt viscosity up to 10 to the warm-up movement delay of response
8Pa.S.Just because of the molecular weight of UHMWPE is very large, viscosity is high, does not almost have flowability, does not have viscous state, only has rubbery state, so cause easily material to expand in extruder when adopting common screw to extrude, back pressure is very high, can't realize extruding; Critical shear rate is extremely low in addition, and melt fracture occurs easily; Because the coefficient of sliding friction is low, skids easily in the time of charging; Heat release in the extrusion and accumulation of heat are difficult to control, cause macromolecules degradation, so that the molecular weight less than 1,000,000 of goods, cause all premium properties of ultra-high molecular weight polyethylene also to weaken thereupon and disappear, seriously restrict the application of UHMWPE, become the hot subject of material educational circles and industrial circle joint exploration since the eighties.
Summary of the invention
The invention provides a kind of extrusion method of ultra-high molecular weight polyethylene.
For solving the problem that exists in the ultra-high molecular weight polyethylene production process, the technical step that the present invention adopts is: the ultra-high molecular weight polyethylene raw material of molecular weight 〉=2,000,000 is sent in the extruder, pass through successively after conveying, compacting and the heating, realized extruding according to specific technique by extruder.
Above-mentioned machine barrel increases frictional force between material and the machine barrel at feed zone Bian with groove machine barrel (IKV system), thereby keeps the very forward conveying capacity of Strong, does not also affect charging even the mould back pressure is very high.
On the above-mentioned machine barrel pin is set, thereby material is cut apart, converged with mixing, make the material in the screw channel even.Need fluting at the screw rod corresponding with this barrel pins position, and footpath, the end of screw rod is corresponding with the barrel pins position.
Pin on the above-mentioned machine barrel is convenient for changing.Some extruder arranges pin at screw rod, because the pin wearing and tearing are very serious in the extrusion, needs frequent, but the pin on the screw rod is not easy to realize changing.
Pin on the above-mentioned machine barrel has been outside equipped with the copper sheathing of sealing, location and regulating action.
The specific embodiment
The machine barrel of a kind of extruding ultrahigh molecular weight polyethylene of the present invention the steps include: the ultra-high molecular weight polyethylene raw material of molecular weight 〉=2,000,000 is sent in the extruder, passes through successively after conveying, compacting and the heating, is extruded by extruder.The feed zone Bian of extruder barrel arranges pin with groove machine barrel (IKV system) on the machine barrel, pin is outside equipped with copper sheathing.
The present invention increases frictional force between material and the machine barrel at the feed zone Bian of machine barrel with groove machine barrel (IKV system), can keep the very forward conveying capacity of Strong, does not also affect charging even the mould back pressure is very high.Pin is set on the machine barrel, can cuts apart material, converge with mixing, make the material in the screw channel even, and plasticizing effect is good.The effect that the outer copper sheathing that arranges of pin can play sealing, location and regulate.
Claims (4)
1. the machine barrel of an extruding ultrahigh molecular weight polyethylene is characterized in that: described machine barrel at feed zone Bian with groove machine barrel (IKV system).
2. the machine barrel of a kind of extruding ultrahigh molecular weight polyethylene according to claim 1 is characterized in that: on the described machine barrel pin is set.
3. the machine barrel of a kind of extruding ultrahigh molecular weight polyethylene according to claim 1, it is characterized in that: the pin on the described machine barrel is convenient for changing.
4. the machine barrel of a kind of extruding ultrahigh molecular weight polyethylene according to claim 1, it is characterized in that: the pin on the described machine barrel has been outside equipped with the copper sheathing of sealing, location and regulating action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103152162A CN103350500A (en) | 2013-07-25 | 2013-07-25 | Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103152162A CN103350500A (en) | 2013-07-25 | 2013-07-25 | Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103350500A true CN103350500A (en) | 2013-10-16 |
Family
ID=49306959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103152162A Pending CN103350500A (en) | 2013-07-25 | 2013-07-25 | Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103350500A (en) |
-
2013
- 2013-07-25 CN CN2013103152162A patent/CN103350500A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104045901B (en) | The processing method of ultra-high molecular weight polyvinyl composite and production said composition tubing | |
| Zhang et al. | Extrusion processing of ultra-high molecular weight polyethylene | |
| CN202318878U (en) | Screw rod assembly of double-screw extruder | |
| CN203637196U (en) | Equipment for producing polyolefin foamed plastic product | |
| CN109354703A (en) | A kind of class graphene composite material preparation method in-situ inserted based on polymer graphite | |
| CN102558675A (en) | Polypropylene material with high melt strength and preparation method thereof | |
| CN104017265A (en) | Ultra-high molecular weight polyethylene composite tube | |
| CN103772796A (en) | Expanded graphite modified injection molding grade ultra-high molecular weight polyethylene and preparation method thereof | |
| CN101249719B (en) | Extrusion method of super high molecular weight polyethylene nearby melting point | |
| US20140149089A1 (en) | Simulation device, program, and recording medium | |
| CN104530537B (en) | A kind of preparation method and former of high viscosity resins sheet material | |
| CN101733856B (en) | Method for preparing modified ultrahigh molecular weight polyethylene anti-flaming tubular product | |
| CN103350499A (en) | Screw for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) | |
| CN103350500A (en) | Machine barrel for extruding UHMWPE (Ultra High Molecular Weight PolyEthylene) | |
| CN102492208A (en) | Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer | |
| US3309436A (en) | Extrusion method | |
| CN103275469B (en) | PET (polyethylene terephthalate)/TPR (thermal plastic rubber) alloy strapping tape and preparation method thereof | |
| CN204505776U (en) | A kind of extruder | |
| CN204505770U (en) | A kind of extruder of singe screw | |
| CN103963264A (en) | Efficient and energy-saving plastic product extrusion molding system | |
| CN101693402A (en) | Production method of ultra-high molecular weight polyethylene products | |
| CN109228220B (en) | Melt extrusion-flow/calendaring molding method and device for high-viscosity material | |
| CN103692599A (en) | Production method and equipment for foamed plastic product | |
| CN201960729U (en) | Ultrahigh molecular weight polyethylene extruder | |
| NL2023518B1 (en) | A method for continuously manufacturing UHMWPE products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131016 |