CN107685436B - A kind of ultra-high molecular weight polyethylene plasticized screw extruder - Google Patents
A kind of ultra-high molecular weight polyethylene plasticized screw extruder Download PDFInfo
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- CN107685436B CN107685436B CN201711067903.1A CN201711067903A CN107685436B CN 107685436 B CN107685436 B CN 107685436B CN 201711067903 A CN201711067903 A CN 201711067903A CN 107685436 B CN107685436 B CN 107685436B
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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
-
- 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
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2526—Direct drives or gear boxes
-
- 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
- B29C48/40—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 using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/425—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 using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders using three or more screws
-
- 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
- B29C48/40—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 using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/435—Sub-screws
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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
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
-
- 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
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
Abstract
A kind of pressure homogenizing adjustable speed screw extruder, including feeder, by force mixed portion and mixing compression unit, feeder includes the feed screw being rotatably provided in first order barrel；The mixing compression unit includes second level barrel, compression screw rod, drive rod；Screw rod cooperation is compressed in the barrel of the second level, and the compression screw rod tail is fixedly connected with drive rod；The portion mixed by force includes connection shell, mixing portion and melt mixing channel, and the mixing portion includes circumferentially perpendicular to drive rod axis along melt mixing channel to spaced at least two mixings sub-portion and driving portion, and the driving portion drives the mixing blade rotation.The pressure is homogenized adjustable speed screw extruder, both compression screw rod is obtained relative to the respective separately adjustable revolving speed of feed screw, obtain melting charge again is forcing mixing to greatly improve melt uniformity into mixing compression unit, cannot not there is moltenly the plasticizing of the raw material of particle suitable for the big raw material components of viscosity more.
Description
Technical field
The present invention relates to the technical fields of extruder, and in particular to a kind of ultra-high molecular weight polyethylene plasticized screw extrusion
Machine.
Background technique
Ultra-high molecular weight polyethylene, which refers to, sticks equal relative molecular mass 1.5 × 106Above linear structure polyethylene.By
It is high in relative molecular weight, it is plasticized following difficult:
1) screw rod is easily blocked, since viscosity is high, mobility is very poor, and the raw material of High molecular weight polyethylene is powdery
, plasticizing phase mutual friction coefficient is extremely low, when being processed with the conventional plasticized screw rod of the prior art, the high-molecular-weight poly second of powdery
" embracing screw rod " phenomenon occurs in being threadingly advanced for alkene, causes material that blocking occurs in machine barrel compression section and stagnates；
2) raw material rheological property is poor, and common polythene melt is in viscous fluid shape, and when ultra-high molecular weight polyethylene melting
Be translucent shape, i.e., typical high glutinous bullet state, viscosity is up to 1.0 × 109PaS, melt flow rate (MFR) (MFR) (2.16kg)
Almost nil, even if testing load is exacerbated to 21.6kg, also difficulty measures its MFR value.And point of ultra-high molecular weight polyethylene
Son amount is bigger, and melting viscosity is bigger, thus brings extreme difficulties to the shear formings processing such as plasticizing, extrusion, injection molding.
Since its viscosity is high, processing and forming is difficult, the production of the product of its non-continuous shapes for a long time substantially according to
Processed by compacting sintering method or with bar, plate, tubing, efficiency is extremely low, make the practical application of ultra-high molecular weight polyethylene by
To limitation.
Ultra-high molecular weight polyethylene is generally tried every possible means modification, to improve its melt under the premise of not changing basic performance
Mobility.1. modified with flow ability modifying agent；Using the flow ability modifying agent of strength, so that the molecule solution of ultra-high molecular weight polyethylene
Winding arrangement is opened, intermolecular lubricity is retained, thus can be while changing polyethylene mobility, but also modeling
Material after change does not lose its original basic performance.2. liquid crystal polymer composite is modified, liquid crystal polymer being capable of letter
Single mobility for improving ultra-high molecular weight polyethylene, the two are combined together under high temperature action, form faint point between the two
Sub- active force forms helical molecular structures, enhances molecule fluid ability.3. it is chemical crosslinking modified, be added peroxide or,
Coupling agent such as silane and siloxanes, can increase the plasticity of ultra-high molecular weight polyethylene.However, it is still desirable to special modeling
The molding of ultra-high molecular weight polyethylene could be completed by changing machinery.Northcentral University Liu Ya blueness CN101003174A discloses a kind of super face
Boundary's fluid forming machine for extruding assistant high molecular material, to be plasticized to ultra-high molecular weight polyethylene, by twin-screw extrusion
Feeding section, compression section and the homogenizing zone of machine are passed through supercritical carbon dioxide (SC-CO2) and infuse after so that it is refined into multiple a fluid streams
Enter, expand contact area, not only reduce the melting temperature of polymer, and reduces the viscosity of polymer melt.
Single-screw compulsory plasticizing.
Due to the friction factor very little of ultra-high molecular weight polyethylene and barrel and screw rod, being easy to skid forms material plug,
It is usually feeding section design axial groove that the prior art, which solves, forces cooling and realizes superelevation using low compression ratio, deep screw channel
The forced conveyance of molecular weight polyethylene, while increasing be kneaded uniformity as much as possible.Beijing University of Chemical Technology He Jimin's
CN2227016Y discloses a kind of UHMWPE Single Screw extruder, and feeding section machine barrel is independently of compression section and metering
Section, can independently cool down, and feeding section barrel liner sets inner sleeve 11, and 11 inner wall of inner sleeve is equipped with axial groove, groove along squeeze out direction by
Gradual change is shallow, until last disappear, prevents powder from axially spinning, while feeding section screw rod uses double end spiral shell rib, improves charging ability；
To improve compression section clogging, compression section BD points are the first compression section BC and the second compression section CD, the first compression section compression ratio
Less than the second compression section, while the second compression section CD and front metering section are equipped with barrel pins, by force along material circumference stirring one
Promote the consolute of material in week.But still not overcoming single screw rod in the conveying of feeding section powder solid plug, compression section material is half
Solid is difficult to be sufficiently mixed close to machine barrel side and close to spiral shell rib slot side, and melt is the band of screw when squeezing out from metering section
Shape object.
Twin-screw mixer plasticizing.
Twin-screw shear ability with higher and stronger conveying capacity, two screw rods mesh together, and material is strong
System promotes, and will not form material plug as single screw extrusion machine, but material compacting is become melt in fluxing zone and continues to cut
Propulsion is cut, finally in metering section by material conveying progressive die tool, it is existing that twin-screw extrusion can effectively solve skidding of the melt in barrel
As, thus can realize the efficient continuous plastication of ultra-high molecular weight polyethylene.The CN1462682A of Jiangsu Shengjie Industry Co., Ltd.
A kind of double screw extruder for medium-high viscosity system is disclosed, two screw rods pass through engagement type spiral shell rib element and non-engagement
Type spiral shell rib element arrangements combine to be formed, and are taken off in the leading portion of Heterodromy double-screw extruder using non-engagement type screwing element
Processing is waved, good mixing property is made it have, small to material cutting, surface of material regeneration area is big, the capacious feature in region of engagement,
Make it that there is the free volume of larger steam in exhaust section, it is easy to accomplish to be vented the optimum efficiency of devolatilization；Engagement type is used in back segment
Screwing element using its preferable transportation performance and self-cleaning effect avoids that the material after the completion of devolatilization is made to be stranded in cylinder for a long time
In vivo.It can be seen that this counter rotation twin screw extruder combined by engagement type screwing element with non-engagement type screwing element is simultaneous
The advantages of for two kinds of counter rotation twin screw extruders of engagement type and non-engagement type, while respective disadvantage is overcome, it is different at one
The dual function feature of two kinds of double screw extruders in the prior art is realized on double screw extruder.But above-mentioned means are main
It is for devolatilization, other function does not reinforce simultaneously.
Thus, it is desirable to design a kind of ultra-high molecular weight polyethylene screw extruder, existing single screw rod plasticizing, twin-screw are broken through
It is kneaded the defect of plasticizing.
Summary of the invention
For above-mentioned defect existing in the prior art, the purpose of the present invention is to provide a kind of ultra-high molecular weight polyethylenes
Plasticized screw extruder.
The object of the present invention is achieved like this, a kind of ultra-high molecular weight polyethylene plasticized screw extruder, including level-one
The rotation axis of screw rod and second level screw rod, the level-one screw rod is intersected and is connected to inclination angle with the rotation axis of second level screw rod；
The level-one screw rod includes compression feeding mechanism, planet is kneaded mechanism and level-one drives gear, and the compression feeding mechanism includes
Main body and compression moulding screw rod are fed, compression moulding screw rod is by level-one sliding tooth wheel drive rotatable engagement in charging main body；Planet kneading machine
Structure rotates the lower periphery for being engaged on compression moulding screw rod；Second level screw rod includes metering machine barrel, kneading screw and secondary drive gear, is mixed
Refining screw rod is rotatably provided in metering machine barrel by the driving of secondary drive gear；
It further include coordinated drive mechanism, the coordinated drive mechanism includes driving motor, driving cone, drives and sets in cone
The helical rack for having axially spaced-apart to arrange, level-one driving gear and secondary drive gear are engaged on respectively on the helical rack.
Further, material chamber, compression taper hole are equipped in charging main body；Compression moulding screw rod includes compression cone and center bolt
Portion, compression cone are rotatably provided in compression taper hole.
Further, it includes planet machine barrel and planetary-screw that planet, which is kneaded mechanism, and charging body exit is fixedly connected with planet
Machine barrel, at least 6 planetary-screws are engaged between planet machine barrel and center bolt portion.
Further, metering machine barrel includes the inclination feeding cylinder intersected with the rotation axis of metering machine barrel with inclination angle, institute
Stating compression moulding screw rod further includes conveying screw rod portion, and conveying screw rod portion rotatable engagement is in the inclination feeding cylinder.
Further, the kneading screw includes feed zone, and what the feed zone was equipped with 3~6 circles send spiral shell rib by force, described strong
Spiral shell rib is sent to constitute rotation profile, the rotation profile adapts to inclination feeding cylinder and measures the space that machine barrel is crossed to form, rotating wheel
Exterior feature is that mid diameter is maximum, and both sides diameter is approximately equal to the convex curve of metering cylinder bore.
Further, the inclination angle is between 45 °~60 °.
Further, the helical rack includes the first helical rack of reduced diameter section and the second helical tooth of enlarged diameter section
Item, the level-one driving gear engage the second helical rack, and the secondary drive gear engages the first helical rack.
Further, further include drive shell, be respectively equipped with and be arranged in pairs at drive shell bottom in the drive shell
Compression moulding screw-bearing seat, driving cone bearing block and kneading screw bearing block on plate and top plate, the driving cone bearing block
The bearing rotary axis bearing rotary axis with the bearing rotary axis of compression moulding screw-bearing seat and kneading screw bearing block respectively
Line has identical angle.
Further, the compression cone is equipped with continuous compression helicla flute and preheating screw slot, and feeds main body
It is equipped with gas vent in compression helicla flute corresponding position on wall, compresses spiral groove depth continuously from depth to shallow.
Further, compression screw rod is equipped with guide portion above compression cone, and the guide portion is equipped with for by powder
It is sent into the deflector chute of compression helicla flute entrance.
The ultra-high molecular weight polyethylene plasticized screw extruder, in order to solve " being suitable for ultra-high molecular weight polyethylene to be kneaded "
The technical issues of " defect for breaking through existing single screw rod plasticizing, twin-screw mixer plasticizing ", mainly take following corrective measure:
1) compression moulding screw rod realizes that the compression of powder is promoted and is plasticized simultaneously
The guide portion of compression moulding screw rod, compression cone constantly compresses powder and helical feed is to charging body exit, Gu
The compression powder of state is effectively plasticized between center bolt and planetary-screw, reaches high viscoelastic body state；
The compression conveying of powder overcomes the high degree of dispersion defect of prior art screw rod transmission, the powder in compression helicla flute
Material compression body obtains effective in preheating screw slot, and heating efficiency greatly improves.
2) coordinated drive of level-one screw rod and second level screw rod
It realizes charging plasticizing respectively using two rank extruder modes and is kneaded metering, but the prior art generally uses list
The mode solely driven, and the rotation axis of level-one screw rod is used to intersect and be connected to inclination angle with the rotation axis of second level screw rod
Mode then eliminates the connected middle vacuum room of usual two-stage extrusion machine, while driving level-one to drive simultaneously using driving cone
Gear and secondary drive gear, obtain fixed transmission ratio, eliminate an engine.
By the mutual cooperation of structure in terms of two above, accomplish to compress charging, compression preheating simultaneously in powder jointly
Shear melting, while making the driving of second level screw rod while driving the driving structure of level-one screw rod, simple and ingenious structure is suitable for viscous
Spend big raw material components cannot not have moltenly the plasticizing of raw material of particle more.
Detailed description of the invention
Fig. 1 is the main sectional view of ultra-high molecular weight polyethylene plasticized screw extruder embodiment of the present invention.
Appended drawing reference in above-mentioned figure:
100 level-one screw rods, 200 second level screw rods, 300 coordinated drive mechanisms, 400 drive shells
10 compression feeding mechanisms, 20 planets are kneaded mechanism, and 30 are kneaded metrological service, 40 driving motors, 50 activation point tune
Complete machine structure
1 charging main body, 2 compression moulding screw rods, 3 material chambers, 4 compression taper holes, 5 guide portions, 6 compression cones, 7 center bolt portions, 8 pressures
Contracting helicla flute, 9 preheating screw slots, 11 level-ones drive gear, 12 level-one drive shafts, 13 compression moulding screw-bearing seats, 14 interval feedings
Mechanism, 15 conveying screw rod portions
21 planet machine barrels, 22 planetary-screws, 23 top flanges, 24 internal tooths, 25 thrust rings
31 metering machine barrels, 32 kneading screws, 33 inclination feeding cylinders, 34 secondary drive gears, 35 secondary drive axis, 36 are kneaded
Screw-bearing seat
41 driving cones, 42 helical racks, 42.1 first helical racks, 42.2 second helical racks, 43 driving cone axis
Hold seat
Specific embodiment
It elaborates, but is not intended to limit the scope of the invention to the embodiment of the present invention below in conjunction with attached drawing.
As shown, a kind of ultra-high molecular weight polyethylene plasticized screw extruder, including level-one screw rod 100 and second level screw rod
200, the rotation axis of the level-one screw rod 100 is intersected and is connected to inclined angle alpha with the rotation axis of second level screw rod 200；It is described
Level-one screw rod 100 includes compression feeding mechanism 10, planet mixing mechanism 20, and the second level screw rod 200 includes being kneaded metrological service
30, the compression feeding mechanism 10 includes charging main body 1 and compression moulding screw rod 2, and compression moulding screw rod 2 is rotatably provided in charging main body 1；
It feeds and is equipped with material chamber 3, compression taper hole 4 in main body 1；Expect that chamber 3 and compression taper hole 4 are hollow rotating body；Expect that chamber 3 is connected to interval feeding
Mechanism 14.Compression moulding screw rod 2 is successively arranged the guide portion 5 of positive cone, the compression cone 6 of back taper and center bolt portion 7, described to lead
Material portion 5 is located in material chamber 3, and 6 rotatable engagement of compression cone is in the compression taper hole 4；It compresses cone 6 and is equipped with helical angle
It is being less than or equal to 45 ° of continuous compression helicla flute 8 and preheating screw slot 9, and is feeding on the wall of main body 1 in compression helicla flute pair
Position is answered to be equipped with gas vent, the compression spiral groove depth of preceding 3-6 circle is continuously from depth to shallow；Guide portion 5 is equipped with for by powder
It is sent into the deflector chute of compression helicla flute entrance；Powder is through helicla flute continued compression and preheats, and exports from charging main body 1 and continues spiral
Export solid compressed stream.Compression moulding screw rod 2 is equipped with level-one drive shaft 12 and the level-one being fixed in level-one drive shaft driving gear
11。
It includes planet machine barrel 21, planetary-screw 22 that planet, which is kneaded mechanism 20, and the charging main body 1 passes through outlet positioning region
1.1 are fixedly connected with the top flange 23 of the planet machine barrel 21, and planet machine barrel has internal tooth 24；At least 6 planetary-screws 22 revolve
Turn to be engaged between planet machine barrel 21 and center bolt portion 7；21 end of planet machine barrel is equipped with thrust ring 25.It wraps in center bolt portion 7
Include positive cone pressure-reducing screw rod section 7.1 and cylindrical shear screw section 7.2；Center bolt portion 7 has the continuous spiral shell of 45 ° of helical angles
Rib.The solid compressed stream is kneaded heating melting during continuous shear stress stretches flakiness of mechanism 20 through planet and becomes piece
The high viscoelastic body of shape, and export spiral from planet machine barrel 21 and be output in second level screw rod 200；
The mixing metrological service 30 of second level screw rod 200 includes metering machine barrel 31, kneading screw 32, and the rotation of kneading screw 32 is set
It sets in metering machine barrel 31, metering machine barrel 31 has the inclination feeding cylinder intersected with the rotation axis of metering machine barrel with inclined angle alpha
33, inclination feeding cylinder 33 is connected to the end of planet machine barrel 21.The compression moulding screw rod 2 further includes conveying screw rod portion 15, described defeated
Send 15 rotatable engagement of threaded shank in the inclination feeding cylinder 33.Kneading screw 32 is equipped with secondary drive axis 35 and is fixed on second level
Secondary drive gear 34 in drive shaft 35.In the feed zone of second level screw rod 200, kneading screw 32, which is equipped with, send by force spiral shell rib 35,3-6
Circle send by force spiral shell rib 35 to constitute rotation profile L, and the rotation profile L adapts to inclination feeding cylinder 33 and metering machine barrel 31 with inclination angle
The space that α is crossed to form, rotation profile L have mid diameter maximum, and both sides diameter is approximately equal to the convex of metering 31 internal diameter of machine barrel
Curvilinear characteristic.The kneading screw 32 is single screw rod or double engagement screws or planetary-screw structure.
Inclined angle alpha is preferably between 45 °~60 °.
It further include coordinated drive mechanism 300, the coordinated drive mechanism 300 includes driving motor 40, driving cone 41, institute
State the rotation of driving motor 40 and drive the driving cone 41, the rotation axis setting of the driving cone 41 respectively with compress screw rod
There is 2 rotation axis and kneading screw 32 identical driving angle β, the driving angle β to be equal to the half of inclined angle alpha, thus
Determine that the lower engagement bus of driving cone 41 is horizontal and is parallel to the rotation axis of kneading screw 32, upper engagement bus is parallel to
The rotation axis of compression moulding screw rod 2, and level-one driving gear 11 and the reference diameter D having the same of secondary drive gear 34It drives.Institute
The axially spaced multiple helical racks 42 of arrangement in driving cone 41 are stated, the level-one driving rotation of gear 11, which is engaged on to be located at, drives
Helical rack 42 on the upper engagement bus of movable cone 41；The rotation of secondary drive gear 34, which is engaged on, is located at driving cone 41
Lower engagement bus on cone tooth 42.
The rotation of 2 upper end of compression moulding screw rod stretches out charging main body 1 and is externally provided with level-one drive shaft 12, consolidates in the level-one drive shaft 12
Surely there are level-one driving gear 11 and activation point adjustment mechanism 50, the level-one drive shaft 12 is equipped with keyway 51, level-one driving
Gear 11 is cooperated in keyway 51 by slide key 52, and activation point adjustment mechanism 50 drives position of the slide key 52 in keyway 51
Which set to adjust it with column helical rack 42 and engage；32 left end of kneading screw is externally provided with secondary drive axis 5 in metering machine barrel 31,
It is equipped with secondary drive gear 34 on secondary drive axis 35 and activation point adjusts structure 50, the secondary drive axis 35 is equipped with
Keyway 51, secondary drive gear 34 are cooperated in keyway 51 by slide key 52, and activation point adjustment mechanism 50 drives slide key
Any engaged to adjust it with part of helical rack 42 52 position in keyway 51.
The helical rack 42 includes the first helical rack 42.1 of reduced diameter section and the second helical rack of enlarged diameter section
42.2, the level-one driving gear 11 is engaged on the second helical rack 42.2, and secondary drive gear 34 is engaged on the first spiral
On rack gear 42.1.In this way, the rotation of level-one screw rod 100 and second level screw rod 200 can be met simultaneously using a driving motor 40
Driving, meanwhile, coordinated drive mechanism 300, which can reach the rotation of compression moulding screw rod 2 and the rotation of kneading screw 32, has fixed turn
Speed ratio.Detailed analysis is as follows:
Assuming that the reference diameter of the first helical rack 42.1 is DIt is small, the reference diameter of the second helical rack 42.2 is
DGreatly, then the second transmission ratio i of the first helical rack 42.1 and secondary drive gear 34 of cone is driven2For i2=driving tooth rotation
Speed/driven gear revolving speed=driving cone the number of teeth/secondary drive number of gear teeth=DIt drives/DIt is small；Drive the second helical rack of cone
42.2 drive the first transmission ratio i of gear 11 with level-one1For i1=driving gear revolving speed/driven gear revolving speed=driving cone tooth
Number/level-one drives number of gear teeth=DIt drives/DGreatly；Therefore, the second transmission ratio i2Greater than the first transmission ratio i1, and the two has fixed proportion,
i2/i1=DGreatly/DIt is small.Therefore, because the second helical rack 42.2 driving level-one of major diameter drives gear 11 slowly to rotate, and
The first helical rack 42.1 driving kneading screw 32 of minor diameter is rotated with fast speed, and compression charging, shearing, which are kneaded, to be needed to turn
Speed is relatively slow, and the kneading screw of metering section then needs quickly to rotate, and maintains the high-elastic condition of ultra-high molecular weight polyethylene.
In order to guarantee that the rotation axis for compressing screw rod 2 and kneading screw 32 have identical driving angle β, the supra polymer
Weight northylen plasticized screw extruder further includes drive shell 400, is respectively equipped with and is arranged in pairs in the drive shell 400
Compression moulding screw-bearing seat 13, driving cone bearing block 43 and kneading screw bearing block 36 on drive shell bottom plate and top plate.Institute
State driving cone bearing block 43 bearing rotary axis respectively with the bearing rotary axis of compression moulding screw-bearing seat 12, kneading screw
The bearing rotary axis of bearing block 37 has identical angle, equal to the half of inclined angle alpha.
The ultra-high molecular weight polyethylene plasticized screw extruder has been accomplished to compress charging, compression preheating simultaneously in powder
Shear melting, while making the driving of second level screw rod while driving the driving structure of level-one screw rod, simple and ingenious structure is suitable for viscous
Spend big raw material components cannot not have moltenly the plasticizing of raw material of particle more.
Claims (10)
1. a kind of ultra-high molecular weight polyethylene plasticized screw extruder, which is characterized in that
Including level-one screw rod (100) and second level screw rod (200), the rotation axis and second level screw rod of the level-one screw rod (100)
(200) rotation axis is intersected and is connected to inclination angle (α)；
The level-one screw rod (100) includes compression feeding mechanism (10), planet is kneaded mechanism (20) and level-one drives gear (11),
The compression feeding mechanism (10) includes charging main body (1) and compression moulding screw rod (2), and charging main body (1) includes material chamber (3) and compresses
Taper hole (4), compression moulding screw rod (2) is by level-one driving gear (11) driving rotatable engagement in charging main body (1)；
Compression moulding screw rod (2) includes the compression cone (6), center bolt portion (7) and defeated of same rotation axis and sequence integrally connected
It send threaded shank (15), compression cone (6) is rotatably provided in compression taper hole (4)；It compresses cone (6) and is equipped with continuous compression spiral
Slot (8) and preheating screw slot (9), compression helicla flute (8) depth of preceding 3-6 circle is continuously from depth to shallow；Feed main body (1) outlet
It is connected to planet and is kneaded mechanism (20), the planet is kneaded mechanism (20) rotation and is engaged on around center bolt portion (7)；
Second level screw rod (200) includes metering machine barrel (31), kneading screw (32) and secondary drive gear (34), kneading screw (32)
By secondary drive gear (34) driving be rotatably provided in metering machine barrel (31) in, metering machine barrel (31) have rotate axis with
The inclination feeding cylinder (33) of inclination angle (α) intersection；Conveying screw rod portion (15) rotatable engagement is in inclination feeding cylinder (33)；
It further include coordinated drive mechanism (300), the coordinated drive mechanism (300) includes driving motor (40), driving cone
(41), driving cone (41) is equipped with the helical rack (42) of axially spaced-apart arrangement, and level-one drives gear (11) and secondary drive
Gear (34) is engaged on respectively on different helical racks.
2. ultra-high molecular weight polyethylene plasticized screw extruder as described in claim 1, which is characterized in that further include drive shell
(400), the compression moulding screw shaft being arranged in pairs on drive shell bottom plate and top plate is respectively equipped on the drive shell (400)
Seat (13), driving cone bearing block (43) and kneading screw bearing block (36) are held, compression moulding screw rod (2) drives cone (41) and mixes
Refining screw rod (32) is rotatably provided in compression moulding screw-bearing seat (13), driving cone bearing block (43) and kneading screw bearing block respectively
(36) in, the bearing rotary axis bearing rotary with compression moulding screw-bearing seat (13) respectively of driving cone bearing block (43)
The bearing rotary axis of axis and kneading screw bearing block (37) has identical driving angle (β).
3. ultra-high molecular weight polyethylene plasticized screw extruder as claimed in claim 2, which is characterized in that planet is kneaded mechanism
It (20) include planet machine barrel (21) and planetary-screw (22), charging body exit is fixedly connected planet machine barrel (21), at least 6 rows
Starshell bar (22) is engaged between planet machine barrel (21) and center bolt portion (7).
4. ultra-high molecular weight polyethylene plasticized screw extruder as described in claim 1, which is characterized in that planet machine barrel bottom connects
Logical inclination feeding cylinder (33) is equipped with thrust ring (25) between planet machine barrel and inclination feeding cylinder.
5. ultra-high molecular weight polyethylene plasticized screw extruder as claimed in claim 4, which is characterized in that the kneading screw
It (32) include feed zone, the feed zone is equipped with sending spiral shell rib (35) by force for 3~6 circles, described that spiral shell rib (35) is sent to constitute rotating wheel by force
Wide (L), the rotation profile (L) adapt to inclination feeding cylinder (33) and measure the space that machine barrel (31) are crossed to form, rotation profile
(L) maximum for mid diameter, both sides diameter is approximately equal to the convex curve of metering machine barrel (31) internal diameter.
6. ultra-high molecular weight polyethylene plasticized screw extruder as described in claim 1, which is characterized in that the inclination angle (α)
Between 45 °~60 °.
7. ultra-high molecular weight polyethylene plasticized screw extruder as described in claim 1, which is characterized in that the helical rack
It (42) include minor diameter DIt is smallThe first helical rack (42.1) and major diameter DGreatlyThe second helical rack (42.2), the level-one drives
Moving gear (11) engages the second helical rack (42.2), and the secondary drive gear (34) engages the first helical rack (42.1).
8. ultra-high molecular weight polyethylene plasticized screw extruder as claimed in claim 7, which is characterized in that level-one drives gear
(11) and secondary drive gear (34) reference diameter D having the sameIt drives, the first helical rack (42.1) and secondary drive gear
(34) transmission ratio i2, the second helical rack (42.2) and level-one drive the transmission ratio of gear (11) for i1, i2>i1, then
9. ultra-high molecular weight polyethylene plasticized screw extruder as claimed in claim 2, which is characterized in that compression moulding screw rod (2) is also
Including level-one drive shaft (12) that is coaxial and being integrally attached at the top of compression cone (6), charging main body (1) is integrally disposed upon driving
On the bottom plate of shell (400), compression moulding screw-bearing seat (13) is arranged in pairs top plate and charging top body plate in drive shell
Between, in level-one drive shaft (12) rotary setting compression moulding screw-bearing seat (13).
10. ultra-high molecular weight polyethylene plasticized screw extruder as claimed in claim 9, which is characterized in that compression screw rod (2) exists
It compresses and is equipped with guide portion (5) above cone (6), the guide portion is equipped with for powder to be sent into leading for compression helicla flute entrance
Hopper.
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| CN201711067903.1A CN107685436B (en) | 2017-11-03 | 2017-11-03 | A kind of ultra-high molecular weight polyethylene plasticized screw extruder |
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| CN201711067903.1A CN107685436B (en) | 2017-11-03 | 2017-11-03 | A kind of ultra-high molecular weight polyethylene plasticized screw extruder |
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| CN107685436B true CN107685436B (en) | 2019-09-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109986755A (en) * | 2018-12-03 | 2019-07-09 | 浙江华晨螺杆制造有限公司 | A kind of segmented plasticizing injecting device and its processing technology |
| AT522057B1 (en) | 2019-01-18 | 2020-09-15 | Engel Austria Gmbh | Plasticizing unit for an injection molding machine |
| CN109878056A (en) * | 2019-04-18 | 2019-06-14 | 应佳慧 | A kind of screw extruder of positive feed |
| 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 |
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| JPH0716910A (en) * | 1993-07-01 | 1995-01-20 | Toyo Sekkei:Kk | Extruder |
| US6585923B1 (en) * | 1998-10-21 | 2003-07-01 | Natural Colour Kari Kirjavainen Oy | Extrusion method and extruder |
| CN101700692A (en) * | 2009-10-13 | 2010-05-05 | 青岛科技大学 | Special section type double-cone screw extrusion molding device |
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| CN107685436A (en) | 2018-02-13 |
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Effective date of registration: 20221228 Address after: 524400 Plant (G02), No. 828, Jiuzhoujiang Avenue, Lianjiang Economic Development Zone, Zhanjiang City, Guangdong Province Patentee after: Guangdong Zhiyue Electric Appliance Co.,Ltd. Address before: 318050 No. 59, Nongken Xinjian branch, Jinqing Town, Luqiao District, Taizhou City, Zhejiang Province Patentee before: Xu Mengyan |
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