A kneading state detection device includes an acquisition unit that, when an extrusion molding machine that kneads a raw material or kneads a raw material and an additive is in operation, acquires an output of an AE sensor installed on a housing of the extrusion molding machine, and a determination unit that determines a kneading state of the raw material, based on a comparison between a change in intensity of the output of the AE sensor acquired by the acquisition unit and a threshold.

A process for extruding plastic compositions is provided. The process comprises providing a multi-screw extruder with screw elements and conveying, kneading, mixing, degassing or compounding the plastic compositions in the multi-screw extruder using the screw elements.

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.

Device and method for dispersing solids, liquids and gases in an extruder, having at least one shaft (1) and one housing (2), wherein at least one disk (4) with recesses is attached to the shaft, which at least one disk co-rotates with the shaft, and a non-co-rotating disk (3) is arranged immediately adjacent to the disk either in a product flow direction or counter to the product flow direction, which non-co-rotating disk likewise has recesses, and wherein the co-rotating disk is connected to the rotating shaft and has a gap (14) with respect to the housing, and the non-co-rotating disk is connected to the housing and has a gap (15) with respect to the rotating core shaft.

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 screw machine includes an inductive heating device for processing of material to be processed. The inductive heating device is used to heat the material in a heating zone. In the heating zone, at least one housing portion is made of an electromagnetically transparent material at least partly, the material being non-magnetic and electrically non-conductive, whereas at least one treatment element shaft is made of an electrically conductive material at least partly. The inductive heating device includes at least one coil formed integrally with a component of the at least one housing portion, in particular in such a way as to form a hybrid component. During the processing of the material, the inductive heating device generates an alternating magnetic field that produces eddy current losses in the at least one treatment element shaft, the eddy current losses leading to a temperature increase of the at least one treatment element shaft.

A method for the improved extrusion of polyethylene polymers comprising passing polyethylene through a single stage, twin screw extruder comprising a solid polymer conveying zone, a polymer melting zone, a dispersive mixing zone, and a distributive mixing/pumping zone, in which the throughput and screw speed are optimized to reduce the number of gels present, ensure complete polymer melting within the polymer melting zone, and to minimize polymer degradation.

A device, to homogenise plastics material melts, has a homogenising element with a plurality of flow channels, which differ with respect to at least one feature from the group length, cross sectional area and cross sectional shape. When flowing through the homogenising element, the plastics material melt is divided into a plurality of part streams, which, in each case, flow through an associated flow channel. When leaving the respective flow channel the part streams have different flow speeds so the plastics material melt is expanded and sheared on transition to a uniform flow. As a result, a homogenisation of the plastics material melt takes place in a simple, efficient and effective manner.

Methods for improved colorant dispersion in polymer materials using solid-state shear pulverization, as compared to mixing techniques of the prior art, to address concerns relating to colorant agglomeration, plating-out and the like.

In a method for producing a mixture of a metallic matrix material and an additive, a metallic bulk material is molten in a multi-shaft screw machine in a heating zone thereof by means of an inductive heating device to form a metal matrix material. As the at least one housing portion of the housing of the multi-shaft screw machine is made of a non-magnetic and electrically non-conductive material at least partly in the heating zone, a high and efficient energy input for melting the metallic bulk material is achievable in a simple manner. The additive for producing the mixture is admixed to the metallic matrix material by means of treatment element shafts of the multi-shaft screw machine.