Apparatus for taking in (1) a bulkware-comprising material, more particularly a pulverulent, granular, rolling or flocculent material, which is supplied to the intake apparatus (1) via at least one metering device (22), and which is processed further in a multi-shaft extruder, where the intake apparatus (1) comprises a number N of rotatable shafts (4, 4', 4", 4'",...), where each individual shaft (4, 4', 4", 4'",...) extends in a cavity (2) parallel to the axial direction (A) of the multi-shaft extruder; the intake apparatus (1) is configured to take in at least two substreams (13', 14', 15', 16') of the intake material that are substantially equal and definable in terms of mass flow rate, where each substream (13', 14', 15', 16') can be fed to a respective material feed zone (13, 14, 15, 16) from each of which a rotatable shaft arrangement (4, 4', 4", 4'", 7, 7') branches off, said arrangement being configured to take in the substream (13', 14', 15', 16'), which arrangement houses a processing element (9). Metering device (22) for feeding a bulkware-comprising material, more particularly a pulverulent, granular, rolling or flocculent material, to an intake apparatus (1), the metering device being configured to feed the total material stream to the intake apparatus (1) in at least two substreams (13', 14', 15', 16') of the intake material that are substantially equal and definable in terms of mass flow rate, for each of the material feed zones (13, 14, 15, 16).
The invention relates to a device (1) for feeding a bulk goods-containing material, in particular a pulverulent, granular, rolling, or flaked material which is supplied to the feed device (1) via at least one metering device (22) and which is further processed in a multi-shaft extruder. The feed device (1) comprises a number N of rotatable shafts (4, 4', 4", 4'",...), and each individual shaft (4, 4', 4", 4'",...) runs parallel to the axial direction (A) of the multi-shaft extruder in a cavity (2). The feed device (1) is designed to feed at least two sub-streams (13', 14', 15', 16') of the material to be fed, said streams being substantially identical in terms of mass flow in a definable manner, and each sub-stream (13', 14', 15,' 16') can be fed to a material feed zone (13, 14, 15, 16), from which a respective rotatable shaft assembly (4, 4', 4", 4'", 7, 7') extends, said shaft assembly being designed to feed the sub-stream (13', 14', 15', 16'), wherein the feed device (1) is designed to change the adhesion and/or the slide resistance and/or the slip resistance of the material.
B29C 48/793 - Traitement thermique de la matière à mouler par extrusion ou des pièces ou des couches préformées, p. ex. par chauffage ou refroidissement en amont de la zone de plastification, p. ex. chauffage dans la trémie
Device for lateral flow charging of an extruder in which material is fed to at least one conveyor screw disposed in an extruder housing. The material contains gaseous concomitant materials, wherein a degassing housing for receiving an air flow is disposed on the extruder housing, which air flow acts in the extruder housing and which is directed contrary to the conveying direction of the conveyor screw.
In a multi-shaft extruder for the processing of free-flowing material having a barrel and a plurality of co-rotating, tightly intermeshing conveyor shafts (1 to 3) arranged in parallel which have at least two flights and are each guided in a bore (1′ to 3′) in the barrel, each conveyor shaft (1 to 3) is spaced with the ridge (O) of one of its flights from the bore wall (1′, 2′, 3′) by a clearance over at least part of the processing length of the extruder, whereas a gap is formed between the ridge (a, b, c) of another of its flights and the bore wall (1′, 2′, 3′). The conveyor shafts (1 to 3) are arranged in an offset manner relative to each other at an angle such that, at least in one rotational position, the conveyor shaft (2) arranged between two conveyor shafts (1 to 3) is coatable with the free-flowing material on its flanks (A, B) between its ridges (b, O) by means of the gap-forming ridges (a, c) of the two adjacent conveyor shafts (1 and 3), with the said flanks (A, B) being cleanable again from the free-flowing material by means of the ridges (O) of the two adjacent conveyor shafts (1 and 2) spaced from the bore wall (1′, 2′, 3′) by a clearance in at least one further rotational position of the conveyor shaft.
B29C 48/27 - NettoyagePurgeÉvitement de la contamination
B29C 48/40 - Moyens pour plastifier ou homogénéiser la matière à mouler ou pour la forcer dans la filière ou la matrice utilisant des vis entourées par un fourreau coopérant, p. ex. des extrudeuses à vis simple utilisant au moins deux vis parallèles, p. ex. extrudeuses à vis doubles
B29C 48/59 - Vis caractérisées par les détails du pas de vis, p. ex. la forme du pas de vis d’alimentation en matière
B29C 48/425 - Moyens pour plastifier ou homogénéiser la matière à mouler ou pour la forcer dans la filière ou la matrice utilisant des vis entourées par un fourreau coopérant, p. ex. des extrudeuses à vis simple utilisant au moins deux vis parallèles, p. ex. extrudeuses à vis doubles utilisant au moins trois vis
B29B 7/48 - MélangeMalaxage continu, avec dispositifs mécaniques de mélange ou de malaxage avec dispositifs de mélange ou de malaxage mobiles rotatifs avec plus d'un arbre à dispositifs à engrènement, p. ex. à vis qui s'engrènent
B29B 7/70 - Entretien des rouleaux, p. ex. nettoyage
B29C 48/25 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires
The invention relates to a side-stream feeding device for an extruder, in which the material (18) is fed to at least one conveyor screw (17) arranged in an extruder housing (15). The material contains gaseous accompanying substances. A degassing box (5) for receiving a flow of air is arranged on the extruder housing (15), said flow of air being effective in the extruder housing (15) and being directed counter to the conveying direction of the conveyor screw (17).
An extruder is provided that has a housing with at least two axially parallel shafts which are capable of being driven in the same direction and with at least two-flight intermeshing conveying elements stripping each other at an axial distance (Ax) with a small clearance over the entire circumference. The extruder has a distance between the comb of the at least one further flight and the inner wall of the housing. Each conveying element has at least two conveying sections rotated through an angle, wherein each conveying section has an axial length corresponding to at most the outer diameter of the conveying element.
The aim of the invention is to drive an extruder (1) comprising several shafts (3) that are arranged along a circle, provided with treatment elements (4), said shafts (3) being connected to the drive shafts (11) of a gear box (7), provided with output pinions (12, 13). Said output pinions (12, 13) are axially offset such that adjacent drive shafts (11) have a different length (L1, L2) between the ends facing the extruder (1) and the output pinions (12, 13). The axially offset output pinions (12, 13) respectively engage with a sun gear (18, 19). One sun gear (19) is connected to a torsion hollow shaft (21) and the other sun gear (18) is connected to a torsion inner shaft (22) that is arranged therein. Said torsion hollow shaft (21) and the torsion inner shaft (22) are designed such that the difference of the torsion rotational angle caused by the various lengths (L1, L2) of the drive shafts (11) is compensated by a different torsion of the torsion hollow shaft (21) and the torsion inner shaft (22).
An extruder comprises a displacement part with a housing, inside of which at least one screw shaft is housed and which is provided, at one end, with a material entry opening for the material to be processed and, at the other end, with a material outlet opening for the processed material, and with an intermediate opening between the material entry opening and the material outlet opening for discharging gas from the displacement part. A material retaining device is connected to said intermediate opening and has at least one screw shaft inside an intermediate housing. This screw shaft extends from the intermediate opening to a gas discharge opening in the intermediate housing and conveys material entering the intermediate housing back into the displacement part. To this end, the screw section of the screw shaft facing the displacement part has a direction of thread that returns into the displacement part, and the screw section of the screw shaft facing away from the displacement part has an opposite direction of thread.
According to the invention, a fiber strand supply unit (32a, 32b, 32c, 32e, 32f, 32g) comprises at least one fibre strand introduction opening (80a, 80b, 80c, 80f, 80g) that leads to a process chamber (76, 136), said process chamber (76, 136) comprising a transfer zone (30a, 30b) that is provided, in at least one operating mode, to be filled to between 30 % and 80 % with a fibre strand additive mixture (92), and at least one first compression area (36) arranged after the fibre strand introduction opening (80a, 80b, 80c, 80f, 80g) and provided to reduce a conveyed gas volume (94) to about at least one quarter of the volume thereof.
B29C 47/10 - Alimentation en matière à mouler de l'extrudeuse
B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)
B29C 47/40 - utilisant au moins deux vis qui s'engrènent
The invention relates to a multi-shaft extruder device comprising a fibre strand supply unit (32b, 32c, 32d). According to the invention, said fibre strand supply unit (32b, 32c, 32d) comprises at least two fibre strand supply openings (128, 130, 160 - 166, 252).
B29C 47/10 - Alimentation en matière à mouler de l'extrudeuse
B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)
B29C 47/40 - utilisant au moins deux vis qui s'engrènent
A multi-shaft extruder has at least six worm shafts (4) between an exterior housing (9) and an interior housing (10), wherein the worm shafts are disposed in a circle (7). The drive (1) of the multi-shaft extruder has two pinion shafts (2), which are partitioned into groups of identical design and disposed on a circle, the shafts being radially driven from the inside and the outside at equal forces and in the same direction, and are disposed diametrically opposed from each other. The shafts are coaxially connected to the worm shafts (4) of the process part (5) via couplings (3), wherein the worm shafts (4) have a feed length (L) of at least six Do, and a Do/Di ratio of 1.5 to 1.93, wherein Do represents the outside diameter and Di represents the inside diameter of the feed screws (11, 12, 13), and the torque density of the extruder is at least 50 Nm/cm3.
The invention is based on a granulated rod-shaped long fibre material formed from fibre material (14) impregnated with plastic (12). It is proposed that at least 10% of fibres (16) of the fibre material (14) are shorter than a length (18) of the granulated rod-shaped long fibre material.
B29C 45/00 - Moulage par injection, c.-à-d. en forçant un volume déterminé de matière à mouler par une buse d'injection dans un moule ferméAppareils à cet effet
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