Abstract: The present invention relates to a method for producing semicrystalline polymer material, wherein the predominantly amorphous raw polymer material, in particular granules, to be treated is introduced into a crystallization reactor (1) and is partially crystallized there by being heated, but without melting, and subsequently the semicrystalline polymer material obtained in such a way is removed from the crystallization reactor (1) and at least part of said semicrystalline polymer material is diverted and mixed back into the crystallization reactor (1) in order to reduce the adhesive tendency of the polymer material. According to the invention, the diverted semicrystalline polymer material is combined and mixed with the raw polymer material before being mixed back into the crystallization reactor (1), and the mixture is then introduced into the crystallization reactor (1).

Abstract: The invention relates to a method for producing a thermoplastic polymer material that is filled with at least one filler, preferably calcium carbonate CaCO3, sensitive to hydrolytic degradation and optionally hygroscopic, and produced by way of polycondensation, particularly PET, wherein under vacuum conditions, constant stirring or mixing and an increased temperature, a mixture of not yet melted, optionally softened, polymer material comprising the filler is produced, wherein for this purpose a filler, which at the time of addition has not been pre-dried and has a residual moisture (H2O) of more than 500 ppm, particularly more than 1000 ppm, is used.

Abstract: Disclosed is an apparatus for processing plastics, having a mixing implement rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material is removed, a conveyor being provided, with a screw rotating in a housing wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and on the outflow side, an offset distance between the longitudinal axis and the radial that is parallel to the longitudinal axis, and the diameter D of the container has the following relationship to the diameter d of the screw: D=10·3?{square root over (K·d2)}, where D is the internal diameter in mm of the container d is the diameter in mm of the screw and K is a constant which is in the range from 60 to 180.

Abstract: Disclosed in an apparatus for the processing of plastics, with a container with a rotatable mixing implement, wherein a conveyor being provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, there being, on the outflow side, an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis, and wherein the smallest possible distance (ms) between the implement and screw is described by the following relationship: ms?k*d+K, where d is the diameter of the screw in mm, K is a factor in the range from 20 to 100, more particularly 20 to 80, k is a factor in the range from 0.03 to 0.4, more particularly 0.04 to 0.25.

Abstract: Disclosed is an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a conveyor being provided, with a screw rotating in a housing. The invention is characterized in that the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, there being, on the outflow side, an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis, that the L/D ratio of the screw is ?7, and that the compressing format of the screw begins only from a distance (A) of more than 1.5 times the diameter (d) of the screw.

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a rotatable mixing, where, in a side wall, an aperture is formed, where a conveyor is provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and wherein the ratio (V) of the active container volume (SV) to the feed volume (BV) of the container or of the cutter compactor (1), where V=SV/BV, is one where 4?V?30, where the active container volume (SV) is defined by the formula SV = D 3 ? ? 4 and D is the internal diameter of the container, and where the feed volume (BV) is defined by the formula BV = D 2 ? ? 4 · H , where H is the height of the intake aperture.

Abstract: The invention relates to an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a multiscrew conveyor being provided, with at least two screws rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis of the screw closest to the container, on the outflow side, and the radius that is parallel to the longitudinal axis, and in that the screws co-rotate.

Abstract: The invention relates to an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a conveyor being provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis, and in that screw rotates clockwise, when seen from the starting point of the screw in the direction towards the end or towards the discharge aperture of the conveyor.

Abstract: The invention relates to an apparatus and a method for the processing of plastic material, with a receptacle or cutter-compactor (1) into which the material to be treated can be introduced, in the lower region of which a discharge opening (10) is provided, through which the processed material can be ejected from the receptacle (1), for example into an extruder (11). According to the invention, the receptacle (1) is divided into at least two chambers (6a, 6b, 6c, . . . ) separated from each other by an intermediate base (2?, 2?, . . . ), wherein at least one mixing or comminution tool (7a, 7b, 7c, . . . ) is arranged which acts upon the material in each chamber (6a, 6b, 6c, . . . ), with which the material can be converted into a softened but permanently lumpy or particle-shaped and not melted state and wherein means (5?, 5?, . . . ) are provided which effect or permit an exchange or a transfer of the softened, lumpy, not melted material between each directly adjacent chamber (6a, 6b, 6c, . . . ).

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a rotatable mixing, wherein, in a side wall, an aperture is formed, and a conveyor being provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and wherein the radial distance (mb) between the implement and the inner surface of the side wall of the container is in the range from 15 mm to 120 mm, and complies with the following relationship: mb=k*DB where DB . . . is the internal diameter of the container in mm and k . . . is a constant in the range from 0.006 to 0.16.

Abstract: The invention relates to an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a multiscrew conveyor being provided, with at least two screws rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis of the screw closest to the container and the radius that is parallel to the longitudinal axis, and in that the two screws closest to the intake aperture are counter-rotating relative to one another.

Abstract: Disclosed is an apparatus for processing of plastics, with a container with a mixing implement, and a conveyor provided with a screw rotating in a housing, the housing being divided into two chambers, the frontal chamber having an intake aperture, and the rearward chamber having at least one degassing aperture, the two chambers being connected to one another through a channel having a melt filter, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, wherein the distance from the opening of the channel into the rearward chamber to the degassing aperture is in a range from 1.5 to 15 times the nominal diameter (d) of the screw.

Abstract: Disclosed is an apparatus for the processing of plastics, having a container with a rotatable mixing implement, where a conveyor is provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis and the radial that is parallel to the longitudinal axis, wherein on the internal wall area of the container, there is at least one bar-shaped deflector which is directed into the interior of the container, and the height profile of which decreases in the direction of rotation of the mixing implement, seen from above, and the angle included thereby, over its length, with a plane (E) perpendicular to the axis of rotation of the mixing implements is an acute angle (?).

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a mixing implement rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, and a conveyor, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and wherein the L/D ratio of the screw is ?7, and wherein the setting angle (y) of the radially outermost mixing implement, closest to the base, complies with the following relationship: ?=k*d+K, where d is the diameter of the screw in mm, K is a factor in the range from 15 to 35, k is a factor in the range from 0.08 to 0.2.

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a rotatable mixing implement, wherein the imaginary continuation of the longitudinal axis of a conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis and the radial parallel to the longitudinal axis, wherein in the wall section that is part of the housing and that immediately follows the intake aperture in the direction of conveying and that completely surrounds the screw, a pocket extends in the direction of conveying, starting at the downstream edge of the intake aperture over a length (L), where 0.8 d?L?9 d, where d is the external diameter or the diameter of the envelope curve of the screw in the wall section.

Abstract: The present invention relates to a method for producing a polymer material filled with longer fibers, wherein the fibers, which typically have a residual moisture content of approximately 5 to 8% and a minimum length of more than 2 mm, and the carrier material are mixed and heated in a reactor or cutter-compacter, constantly moving them and optionally comminuting the carrier material, and constantly maintaining the pourability and/or lumpiness. According to the invention, the conditions, and particularly the temperature, in the reactor are adjusted so as to dry the fibers to the lowest residual moisture possible, at which the fibers are just barely sufficiently flexible so as not to break during processing in the reactor, or during an optionally following compression step, for example extrusion.

Abstract: The invention relates to a process and an apparatus for the treatment of a material in the form of fragments or particles which is moved and/or rotated, mixed, heated and, if appropriate, comminuted by at least one mixing element (12, 21) in a receiver or cutter-compactor (1), where, in the course of the process, undesired substances which impair the treatment of and/or further operations on the material are removed from the material by introducing a gas, in particular air or an inert gas, in a region below the level of the material located in the receiver (1) during its operation, or below the level of material of the mixing vortex which forms within the receiver (1), where the gas is forced to flow through at least a subregion of the material, and where the gas then saturated with, or with an increased concentration of, undesired substances is discharged from the receiver (1) in a region above the level of the material located in the receiver (1) during its operation or above the level of the material of th

Abstract: The present invention relates to a filtering device for fluids, in particular thermoplastics, comprising a screen carrier (2) which has a rotationally cylindrical outer face (41) and is mounted rotatably in a rotationally cylindrical recess (5), adapted to its circumference, of a stationary housing (3) and in which a number of screening nests (6) having filter arrangements (7) are formed along its circumference. According to the invention, there is provision whereby the screen carrier (2) is penetrated by a rotationally cylindrical core part (1) and is mounted rotatably on this, the core part (1) and the housing (3) being designed to be stationary and fixed in terms of rotation with respect to the rotatable screen carrier (2). (FIG.

Abstract: The invention at hand relates to a rotor disk (1) to be inserted into a receptacle (2) for the treatment of polymers, having a disk body (3) on whose top side (4) mixing and/or comminuting tools (5) are providable and on whose opposite underside (6) a number of conveying ribs (7) extending from the interior to the exterior are provided with which during operation polymer particles are transportable towards the exterior or, respectively, that during operation exert a force directed from the center (8) of the rotor disk (1) towards the exterior on the polymer particles grasped by the conveying ribs (7). In accordance with the invention it is provided that the conveying ribs (7) are curved concavely in the direction of rotation or, respectively, of movement.

Abstract: Disclosed is a device and a method for processing plastic material with at least one receiving container, wherein at least one mixing and/or comminution tool, rotatable about a rotation axis, is arranged, for mixing and warming the plastic material, and with at least one conveyor for discharging the plastic material from the receiving container, with at least one screw rotating in a housing, where the conveyor is connected, at its material inlet side via an opening which is formed in a side wall of the receiving container, with the interior of the receiving container. An imaginary extension of the central longitudinal axis of the conveyor extends, against the conveyance direction of the conveyor, past the rotation axis of the receiving container, without intersecting this axis, where the longitudinal axis of the conveyor is offset by a separation relative to the radial ray of the receiving container on the discharge side.