Self-cleaning plasticizing venting and extruding apparatus by co-rotating non-twin multi-screws and method thereof

摘要

A self-cleaning plasticizing venting and extruding apparatus by co-rotating non-twin multi-screws and a method thereof are provided, said apparatus comprises a screw mechanism, barrel, feeding port, venting port, discharging port, and driving mechanism. Said screw mechanism comprises non-uniform central screw and lateral screws, the axis of the central screw coincides with the barrel, and the lateral screws are provided on both sides of the central screw and engaged with the central screw; the contour lines of the threads of said central screw and said lateral screws are tangent to the inner wall of the barrel; and said driving mechanism is connected to the central screw and lateral screws. Each screw-uses an asymmetrical flow channel shape, so the flow space is asymmetric, and the compounding intensity and effectiveness enhanced. The dispersion and mixing effects are excellent, generating a self-cleaning effect. The system is suitable for high yield nano-material processing.

主权项

1. A self-cleaning plasticizing venting and extruding apparatus by co-rotating non-twin multi-screws, comprising a screw mechanism, a barrel, a feeding port, a venting port, a discharging port, and a driving mechanism, wherein said driving mechanism is provided at the ends of the barrel respectively, and is connected to the screw mechanism; wherein said screw mechanism is provided inside the barrel, and placed horizontally, and the inner section of the barrel is divided into a solid transporting zone, a melting zone, a venting zone and a compounding and extruding zone; said feeding port is provided above the barrel of the solid transporting zone, said venting port is provided above the barrel of the venting zone, and both the feeding port and the venting port are communicated with the barrel; said discharging port is provided at the end of the barrel, characterized in that said screw mechanism comprises non-uniform shaped central screw and lateral screws, the axis of the central screw is coincided with that of the barrel, the lateral screws are engaged with the central screw, and the contour lines of the threads of the central screw and the lateral screws are tangent to the inner wall of the barrel; said driving mechanism is connected to the central screw and the lateral screws respectively, wherein:
said lateral screws are two screws, left screw and right screw, which are provided on both sides of the central screw respectively, and engaged with the central screw; the inner cavity of said barrel is consisted of three cylinder grooves which are communicated with each other, each of the cylinder grooves is fitted with the left screw, the central screw and the right screw respectively; the central axis distances from the cylinder grooves on both sides to the cylinder groove at the central position are equal to the centerline distances from the central screw to the left screw and right screw; the shape of the cross-section of said left screw is the same as the curve shape formed after the cross-section of the right screw is rotated counterclockwise by 180° along the center point of the cylinder groove of the barrel corresponding to the central screw; with the center points of the cylinder grooves of the barrel corresponding to the central screw and each of the lateral screws respectively as poles, and the rays elicited horizontally rightwards from the poles as polar axes, the shape curve of the cross-section of said central screw meets that:when⁢⁢0⁢°≤θ≤25⁢°,ρ⁡(θ)=(0.32256+0.00392⁢θ+0.000309497⁢⁢θ2-2.57326×10-5⁢θ3+9.28644×10-7⁢θ4+1.8713×10-8⁢θ5-8.12786×10-10⁢θ6-9.61005×10-12⁢θ7)⁢D0;when⁢⁢25⁢°≤θ≤63⁢°,ρ⁡(θ)=0.5⁢D0;when⁢⁢63⁢°≤θ≤123⁢°,ρ⁡(θ)=(0.5+0.000823585⁢(θ-63)-0.00134⁢(θ-63)2+8.00734×10-5⁢(θ-63)3-2.14653×10-6⁢(θ-63)4+2.76223×10-8⁢(θ-63)5-1.37762×10-10⁢(θ-63)6)⁢D0;when⁢⁢123⁢°≤θ≤147⁢°,ρ⁡(θ)=(0.25391-0.00207⁢(θ-123)+0.000573645⁢(θ-123)2-8.45874×10-5⁢(θ-123)3+6.53416×10-6⁢(θ-123)4-2.56256×10-7⁢(θ-123)5+4.47098×10-9⁢(θ-123)6-2.03618×10-11⁢(θ-123)7)⁢D0;when⁢⁢147⁢°≤θ≤205⁢°,ρ⁡(θ)=(0.25374+0.000730048⁢(θ-147)-0.000156535⁢(θ-147)2+3.73081×10-5⁢(θ-147)3-3.07839×10-6⁢(θ-147)4+1.32913×10-7⁢(θ-147)5-3.10949×10-9⁢(θ-147)6+3.74465×10-11⁢(θ-147)7-1.81606×10-13⁢(θ-147)8)⁢D0;when⁢⁢205⁢°≤θ≤243⁢°,ρ⁡(θ)=0.5⁢D0;when⁢⁢243⁢°≤θ≤307⁢°,⁢ρ⁡(θ)=(0.5+0.00369⁢(θ-243)-0.00226⁢(θ-243)2+0.000184965⁢(θ-243)3-7.94221×10-6⁢(θ-243)4+2.00615×10-7⁢(θ-243)5-2.9807×10-9⁢(θ-243)6+2.4097×10-11⁢(θ-243)7-8.17763×10-14⁢(θ-243)8)⁢D0;when⁢⁢307⁢°≤θ≤323⁢°,ρ⁡(θ)=(0.2568-0.00882⁢(θ-307)+0.00414⁢(θ-307)2-0.000908651⁢(θ-307)3+0.000100777⁢(θ-307)4-5.50309×10-6⁢(θ-307)5+1.20454×10-7⁢(θ-307)6-1.95559×10-10⁢(θ-307)7)⁢D0;when⁢⁢323⁢°≤θ≤360⁢°,ρ⁡(θ)=(0.25618+0.00082668⁢⁢(θ-323)-0.000319894⁢⁢(θ-323)2+4.17742×10-5⁢(θ-323)3-2.08266×10-6⁢(θ-323)4+4.80871×10-8⁢(θ-323)5-4.18424×10-10⁢(θ-323)6)⁢D0; wherein, θ is a value corresponding to the polar angle degree, ρ is a polar radius, and D0 is an inner diameter of the cylinder groove of the barrel corresponding to said screw; the shape curve of the cross-section of said right screw meets that:when⁢⁢0⁢°≤θ≤80⁢°,ρ⁡(θ)=(0.28446+0.00173⁢θ-4.07776×10-6⁢θ2+4.49932×10-7⁢θ3-3.26681×10-9⁢θ4)⁢D0;when⁢⁢80⁢°≤θ≤100⁢°,ρ⁡(θ)=(0.49331+0.00156⁢(θ-80)+3.82324×10-5⁢(θ-80)2-4.32369×10-5⁢(θ-80)3+5.05212×10-6⁢(θ-80)4-2.3955×10-7⁢(θ-80)5+4.02621×10-9⁢(θ-80)6)⁢D0;when⁢⁢100⁢°≤θ≤229⁢°,ρ⁡(θ)=(0.49336-0.00325⁢(θ-100)-4.70431×10-6⁢(θ-100)2+2.18207×10-7⁢(θ-100)3-7.76735×10-10⁢(θ-100)4)⁢D0;when⁢⁢229⁢°≤θ≤305⁢°,ρ⁡(θ)=0.25⁢D0;when⁢⁢305⁢°≤θ≤360⁢°,ρ⁡(θ)=(0.25-8.84562×10-5⁢(θ-305)+2.30409×10-5⁢(θ-305)2-8.10513×10-7⁢(θ-305)3+2.00086×10-8⁢(θ-305)4-1.56195×10-10⁢(θ-305)5)⁢D0; wherein, θ is a value corresponding to the polar angle degree, ρ is a polar radius, and D0 is an inner diameter of the cylinder groove of the barrel corresponding to said screw; or, the shape curve of the cross-section of said central screw meets that:when⁢⁢0⁢°≤θ≤23⁢°,ρ⁡(θ)=(0.39546+0.00436⁢θ-0.000328898⁢⁢θ2+0.000049615⁢⁢θ3-2.50164×10-6⁢θ4+5.0823×10-8⁢θ5-4.85534×10-10⁢θ6)⁢D0;when⁢⁢23⁢°≤θ≤145⁢°,ρ⁡(θ)=(0.48059+0.000898536⁢(θ-23)-0.000962297⁢(θ-23)2+5.0179×10-5⁢(θ-23)3-1.28633×10-6⁢(θ-23)4+1.88747×10-8⁢(θ-23)5-1.6028×10-10⁢(θ-23)6+7.32557×10-13⁢(θ-23)7-1.39342×10-15⁢(θ-145)8)⁢D0;when⁢⁢145⁢°≤θ≤202⁢°,ρ⁡(θ)=(0.35035-0.000044154⁢(θ-145)+6.21993×10-5⁢(θ-145)2-8.31288×10-6⁢(θ-145)3+6.56112×10-7⁢(θ-145)4-2.23522×10-8⁢(θ-145)5+3.57533×10-10⁢(θ-145)6-2.18353×10-12⁢(θ-145)7)⁢D0;when⁢⁢202⁢°≤θ≤225⁢°,ρ⁡(θ)=(0.48074-0.00133⁢(θ-202)+0.000542495⁢⁢(θ-202)2-0.000148596⁢(θ-202)3+8.56691×10-6⁢(θ-202)4-1.51835×10-7⁢(θ-202)5)⁢D0;when⁢⁢225⁢°≤θ≤325⁢°,ρ⁡(θ)=(0.34927-0.00583⁢(θ-225)+0.000183457⁢⁢(θ-225)2-5.41662×10-6⁢(θ-225)3+1.25448×10-7⁢(θ-225)4-1.7397×10-9⁢(θ-225)5+1.27967×10-11⁢(θ-225)6-3.77702×10-14⁢(θ-225)7)⁢D0;when⁢⁢325⁢°≤θ≤351⁢°,ρ⁡(θ)=(0.35169-0.000591024⁢⁢(θ-325)+0.000116942⁢⁢(θ-325)2-8.07623×10-6⁢(θ-325)3+3.51208×10-7⁢(θ-325)4-5.2224×10-9⁢(θ-325)5)⁢D0;when⁢⁢351⁢°≤θ≤360⁢°,ρ⁡(θ)=(0.37187+0.00178⁢(θ-351)+0.000238541⁢(θ-351)2-1.61095×10-5⁢(θ-351)3)⁢D0; wherein, θ is a value corresponding to the polar angle degree, ρ is a polar radius, and D0 is an inner diameter of the cylinder groove of the barrel corresponding to said screw; the shape curve of the cross-section of said right screw meets that:when⁢⁢0⁢°≤θ°≤13⁢°,⁢ρ⁡(θ)=(0.49645+0.000256512⁢⁢θ+0.000149725⁢⁢θ2-2.18392×10-5⁢θ3+6.8663×10-7⁢θ4)⁢D0;when⁢⁢13⁢°≤θ≤119⁢°,⁢ρ⁡(θ)=(0.49672+0.0016⁢(θ-13)-0.0001640439⁢⁢(θ-13)2+3.66195×10-6⁢(θ-13)3-4.18633×10-8⁢(θ-13)4+2.44243×10-10⁢(θ-13)5-5.70929×10-13⁢(θ-13)6)⁢D0;when⁢⁢119⁢°≤θ≤360⁢°,⁢ρ⁡(θ)=(0.39857-0.00147⁢(θ-119)-2.94068×10-5⁢(θ-119)2+6.44036×10-7⁢(θ-119)3-4.79428×10-9⁢(θ-119)4+1.70193×10-11⁢(θ-119)5-2.30605×10-14⁢(θ-119)6)⁢D0; wherein, θ is a value corresponding to the polar angle degree, ρ is a polar radius, and D0 is an inner diameter of the cylinder groove of the barrel corresponding to said screw.