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公开(公告)号：US11498255B2
公开(公告)日：2022-11-15
申请号：US16772223
申请日：2018-12-17
申请人： NEW YORK UNIVERSITY
摘要： A method of extruding filament comprises the steps of cutting a bulk source material into pieces having size S1, performing a first extrusion pass comprising the steps of melting the pieces in an extruding device at a temperature T1 and extruding a first filament at an extrusion speed V1, and performing at least one additional extrusion pass k comprising the steps of cutting the first filament into pieces having size Sk, melting the pieces in an extruding device at temperature Tk, and extruding a final filament at an extrusion speed Vk. A system for extruding filament is also described.
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公开(公告)号：US10792634B2
公开(公告)日：2020-10-06
申请号：US15747021
申请日：2016-08-01
发明人： Radhika Ghike , Vijay Kulkarni , Indu Bhushan , Himadri Sen , Babu Padmanabhan , Vinay Rao
IPC分类号： B01J2/20 , B29C48/40 , B29C48/92 , B01J2/28 , B01J2/30 , A61K9/16 , A61J3/02 , B29B9/06 , B29C48/59 , B29C48/57 , B29C48/04
摘要： A process for preparing granules is disclosed. The process comprises the steps of feeding the input material for granulation in a processor using one or more powder feeders, introducing steam as a granulation activating agent in the processor, granulating the input material in presence of the steam to form granules, and collecting the granules from a discharge zone of the processor. A co-rotating twin-screw processor for preparing granules is also disclosed.
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公开(公告)号：US20190329450A1
公开(公告)日：2019-10-31
申请号：US16462217
申请日：2018-07-03
发明人： Harald Rust
IPC分类号： B29B7/48 , B29B7/74 , B29B7/84 , B29C48/285 , B29C48/44 , B29C48/59 , B29C48/655
摘要： A planetary roller extruder section forms a feed part of an extruder. The planetary roller extruder has an internally toothed housing and an externally toothed central spindle disposed centrally within and at a distance from the housing. Planetary spindles are arranged to rotate in a void between the central spindle and the housing. Each planetary spindle has an external toothing meshing with both the housing and the central spindle. At least one planetary spindle has two axially spaced areas with less than a full set of teeth. Those axially spaced areas include a first area having a first number of teeth and a second area having a second number of teeth. The second number of teeth is less than a full set of teeth and more than the first number of teeth.
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公开(公告)号：US11485063B2
公开(公告)日：2022-11-01
申请号：US17007886
申请日：2020-08-31
申请人： Wuyi University
发明人： Baiping Xu , Huiwen Yu , Shuping Xiao , Yaoxue Du
IPC分类号： B29C48/41 , B29C48/65 , B29C48/425 , B29C48/59 , B29C48/535
摘要： A counter-rotating differential speed extrusion device includes a barrel and a screw mechanism in the barrel comprising a first and second screws. A crest diameter and a root diameter of the first screw are respectively meshed with that of the second screw; the first and second screws counter-rotate in differential speeds at a fixed rotation speed ratio; at least one first intermediate circular arc structure with a trend consistent with that of the crest diameter and the root diameter of the first screw is provided between the root diameter and the crest diameter of the first screw, a second intermediate circular arc structure tangent to the first intermediate circular arc structure and having a trend consistent with that of the root diameter and the crest diameter of the second screw is provided between the root diameter and the crest diameter of the second screw.
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公开(公告)号：US20210308929A1
公开(公告)日：2021-10-07
申请号：US17007886
申请日：2020-08-31
申请人： Wuyi University
发明人： Baiping XU , Huiwen YU , Shuping XIAO , Yaoxue DU
IPC分类号： B29C48/41 , B29C48/535 , B29C48/425 , B29C48/59 , B29C48/65
摘要： A counter-rotating differential speed extrusion device includes a barrel and a screw mechanism in the barrel comprising a first and second screws. A crest diameter and a root diameter of the first screw are respectively meshed with that of the second screw; the first and second screws counter-rotate in differential speeds at a fixed rotation speed ratio; at least one first intermediate circular arc structure with a trend consistent with that of the crest diameter and the root diameter of the first screw is provided between the root diameter and the crest diameter of the first screw, a second intermediate circular arc structure tangent to the first intermediate circular arc structure and having a trend consistent with that of the root diameter and the crest diameter of the second screw is provided between the root diameter and the crest diameter of the second screw.
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公开(公告)号：US11648721B2
公开(公告)日：2023-05-16
申请号：US16530860
申请日：2019-08-02
申请人： WUYI UNIVERSITY
发明人： Baiping Xu , Huiwen Yu , Yaoxue Du
IPC分类号： B29C48/405 , B29C48/425 , B29C48/59 , B29C48/25
CPC分类号： B29C48/405 , B29C48/2517 , B29C48/425 , B29C48/59
摘要： The disclosure discloses a co-rotating dual speed multi-screw extruder and a processing method thereof, the co-rotating dual speed multi-screw extruder enables a first screw and a second screw with the same outer diameter to co-rotate at different speed in a barrel, and the two screws wipe with each other, to achieve self-cleaning in processing; and circular arcs meshed with each other are respectively arranged between root diameters and top diameters of the two screws to form a first step structure and a second step structure, thus breaking an axial symmetry of a cross-sectional contour of the screws, and moreover, the first step structure and the second step structure are periodically meshed in a meshing zone in a staggered manner, so that a flow channel in the meshing zone is changed in a topological way, a strong elongation action and a strong disturbance action are effectively introduced in the meshing zone.
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公开(公告)号：US11027475B2
公开(公告)日：2021-06-08
申请号：US16091815
申请日：2017-04-12
申请人： KOBE STEEL, LTD.
发明人： Kazuhisa Fukutani , Kosuke Higashi
IPC分类号： B22C5/00 , B29C48/395 , B29B7/48 , B29B7/42 , B29C48/80 , B29B7/74 , B29C48/60 , B29C48/385 , B29C48/59 , B29C48/35 , B29C48/525 , B29L7/00
摘要： A screw extruder which extrudes a kneaded material includes a screw having a helical flight provided on an outer peripheral surface of a shaft portion thereof, and a chamber housing the screw. In the screw extruder, a flight thickening portion is provided at a part which is a tip portion of the flight and is on the reverse side of a rotation direction of the flight.
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公开(公告)号：US10532490B2
公开(公告)日：2020-01-14
申请号：US15091802
申请日：2016-04-06
申请人： Davis-Standard, LLC
发明人： John P. Christiano
IPC分类号： B29B7/42 , B29C48/53 , B29C48/535 , B29C48/59 , B29C48/655
摘要： A screw for a plasticating apparatus has one or more helical flights. A portion of the screw has a plurality of advancing grooves arranged in a noncontinuous helix cut in the screw. The advancing grooves are dimensioned to receive material therein as the material is conveyed through the barrel. The screw has a plurality of noncontinuous cross-cut grooves traversing one or more of the advancing grooves. The cross-cut grooves have a second helix angle greater than the first helix angle and less than ninety degrees; and/or one or more of the cross-cut grooves have a third helix angle of about ninety degrees.
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公开(公告)号：US20200001502A1
公开(公告)日：2020-01-02
申请号：US16560614
申请日：2019-09-04
发明人： Harald Rust
IPC分类号： B29B7/84 , B29B7/48 , B29B7/74 , B29C48/285 , B29C48/44 , B29C48/59 , B29C48/655
摘要： A planetary extruder for producing and processing polymers includes a degassing section. The extruder includes a housing and a bushing arranged therein. The bushing has an internal toothing with a pitch diameter and a root circle. An externally toothed central spindle is arranged within the housing. Planetary spindles rotate about the central spindle between the central spindle and the bushing. A heat transfer fluid is guided through fluid channels which extend helically along an outer surface of the bushing and guide the heat transfer fluid axially. A degassing opening is provided to which a negative pressure is applied for degassing. A minimum radial thickness (t) of the bushing between the root circle of the internal toothing on an inside of the bushing and a bottom of the fluid channels on an outside of the bushing is selected based on the pitch diameter (d) of the internal toothing.
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公开(公告)号：US10513051B2
公开(公告)日：2019-12-24
申请号：US15704763
申请日：2017-09-14
发明人： Terry Wayne Williams
摘要： An mixing section for an extrusion screw has an inlet end and an outlet end as well as alternating wiping lands and barrier lands. The wiping lands have a greater helix angle than the barrier lands. The wiping lands and the barrier lands define inlet channels which narrow toward the outlet end and outlet channels which widen toward the outlet end. A helical pattern of mixing channels is cut into the wiping lands and the barrier lands. The mixing channels may be oriented generally at approximately right angles to the wiping lands and the barrier lands. A portion of the extrudate encounters the inside wall surfaces of the mixing channels and changes direction which improves the mixing of the extrudate.
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