A dispersive mixing element for co-rotating twin screw extruder is disclosed. The element for co-rotating twin screw extruder comprises of a continuous flight helically formed thereon having a lead L, wherein either the flight transforms at least once from an integer lobe flight into a non-integer lobe flight in a fraction of the lead L and transforms back to an integer lobe flight in a fraction of the lead L or the flight transforms at least once from a non-integer lobe flight into an integer lobe flight in a fraction of the lead L and transforms back to a non-integer lobe flight in a fraction of the lead L.

A co-rotating twin screw extruder for forming fragments is disclosed. The extruder comprises of an intake zone for receiving one or more excipient(s) suitable for oral dosage or one or more excipient(s) suitable for oral dosage along with one or more active pharmaceutical ingredient, a melt zone for softening at least one excipient to form a viscous mass or melt and a fragmenting zone for fragmenting and cooling the viscous mass into cooled fragments and an extruder outlet for recovering the cooled fragments from the extruder.

A dispersive mixing element for co-rotating twin screw extruder is disclosed. The element for co-rotating twin screw extruder comprises of a continuous flight helically formed thereon having a lead L, wherein either the flight transforms at least once from an integer lobe flight into a non-integer lobe flight in a fraction of the lead L and transforms back to an integer lobe flight in a fraction of the lead L or the flight transforms at least once from a non-integer lobe flight into an integer lobe flight in a fraction of the lead L and transforms back to a non-integer lobe flight in a fraction of the lead L.

The invention relates to mixing elements that have a larger number of basic geometric periods per section and an improved dispersing effect for multi-shaft screw extruders comprising screw shafts that co-rotate in pairs. The invention further relates to the use of the mixing elements in multi-shaft screw extruders, a corresponding screw extruder comprising the mixing elements, and a method for extruding kneadable materials.

Provided is a technology capable of producing a paste with desired viscosity. A twin-screw extruding kneader includes: a housing; two rotational shafts arranged inside the housing; and paddles arranged around each rotational shaft. A paddle length L1 and a clearance C1, and a paddle length L2 and a clearance C2 are set to satisfy a conditional expression shown in the following Math. 1, the paddle length L1 being the sum of thicknesses of all the paddles arranged around the rotational shaft in a stiffly kneading zone, the clearance C1 being the smallest gap width between the paddle arranged in the stiffly kneading zone and the housing, the paddle length L2 being the sum of thicknesses of all the paddles arranged around the rotational shaft in a diluting zone, the clearance C2 being the smallest gap width between the paddle arranged in the diluting zone and the housing.
(L1 /C1)/(L2/C2)1.4[Math. 1] L1: Paddle length in stiffly kneading zone C1: Clearance in stiffly kneading zone L2: Paddle length in diluting zone C2: Clearance in diluting zone

A method and a device for admixing additives into a polymer melt made of non-extracted polyamide 6 are disclosed. The polymer melt is combined in a highly concentrated form with an additional melt flow without additives and mixed therewith. Additionally, a part of the melt is branched off from a main melt flow (3), wherein the sub-melt flow (4) is transported into a dispersing device (5) and is supplied and mixed with one or more additives (12). The side-melt flow (4) with additives is then returned into the main melt flow (3), mixed with the main melt flow, and subsequently supplied for further processing.

A kneading apparatus (21) that makes it possible to easily obtain a kneaded material having a favorable property includes: a screw (23) for extruding polyethylene which has been fed through a feed opening (27); a first heater (24) for heating the polyethylene which is extruded by the screw (23); and a second heater (25) for preheating liquid paraffin which is to be added, through a side-feed opening (28), to the polyethylene which is extruded by the screw (23).

The present disclosure relates to a process for preparing granules from an input material or a powder material. The process comprises feeding the input material for granulation in the 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 optionally collecting the granules from a discharge zone of the processor, wherein feed rate of the steam into the processor is determined based on feed rate of the input material into the processor. A co-rotating twin-screw processor for preparing granules is also discl

A co-rotating twin screw extruder for forming fragments is disclosed. The extruder comprises of an intake zone for receiving one or more excipient(s) suitable for oral dosage or one or more excipient(s) suitable for oral dosage along with one or more active pharmaceutical ingredient, a melt zone for softening at least one excipient to form a viscous mass or melt and a fragmenting zone for fragmenting and cooling the viscous mass into cooled fragments and an extruder outlet for recovering the cooled fragments from the extruder.

The present invention discloses a biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing method and device. The method is characterized in that: the conveying volume of materials formed between two or three engaged eccentric rotors, which are formed by spiral structures and eccentric cylindrical structures connected alternately, and an inner surface of a stator changes periodically along the axial direction and the radial direction of the rotors, achieving the volume pulsed deformation plasticizing and conveying of the materials during engaged rotation of the two or three engaged eccentric rotors. The device's eccentric rotors are all formed by length-varying spiral structures and eccentric cylindrical structures connected alternately; the spiral structures of the eccentric rotors are engaged to each other; the axial positions of eccentric cylindrical structures of the two or three rotors are the same. The present invention can implement extrusion of polymer materials or implement, in combination with a plunger injection unit, injection molding of polymer materials, and have many features such as desirable mixing and plasticizing effects for materials, a short thermo-mechanical course, low power consumption, and wide adaptability.