In a method and a corresponding device for producing an extrudate, starting products are introduced into an extrusion container, heated, and homogeneously intermixed by dual asymmetric centrifugation of the extrusion container. The extrusion container is rotated about a primary rotation axis that extends outside the extrusion container, and is simultaneously rotated about a secondary rotation axis that extends through the extrusion container and is situated at an acute angle with respect to the primary rotation axis. Lastly, the intermixed starting products are jointly extruded from the extrusion container. The method and the corresponding device are particularly suitable for processing small and very small substance quantities.

A method for manufacturing an encapsulating material sheet for a solar battery of the invention includes a step of producing an additive-containing pellet by soaking an additive A into a pellet including a polyolefin-based resin as a main component, a step of injecting the additive-containing pellet into a cylinder from a supply opening in an extrusion molder, and melting and kneading a resin composition including the polyolefin-based resin and the additive A in the cylinder, and a step of molding by extrusion the resin composition from a die in the extrusion molder into a sheet shape.

A rubber extrusion device includes a sensor which detects a deviation from a preset reference position of a rubber extrudate extruded from an extrusion port. Based on this detection data, a control unit provides control for correction of the deviation by adjusting a position of a die relative to a head along a leading end surface of the head or a rotational speed of a screw. A rubber material is mixed and kneaded while being extruded forward by a screw installed inside a cylinder. Resultant unvulcanized rubber is fed into an extrusion flow path and extruded from the extrusion port formed in the die.

The invention relates to a process for producing an extruded sulfur-crosslinkable rubber mixture, comprising the following process steps: A) producing a sulfur-crosslinkable rubber mixture by means of a mixer or providing a sulfur-crosslinkable rubber mixture, where the temperature of the sulfur-crosslinkable rubber mixture is less than 35° C., B) contactlessly adjusting the temperature of the sulfur-crosslinkable rubber mixture produced or provided in step A) to at least 40° C. in a temperature adjustment unit, C) measuring the temperature of the rubber mixture in the temperature adjustment unit and D) feeding the sulfur-crosslinkable rubber mixture that has been measured in step C) into an extrusion unit at a temperature of 35° C. or more and extruding the fed rubber mixture in the extrusion unit. The invention further relates to an apparatus for performing the process and to the use of the apparatus.

A method for processing a thermoset resin mixed with inorganic fibers; said method comprising combining a thermoset resin, an inorganic fiber and water to produce a dispersion.

A poly(oxyalkylene) polymer and a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate, in combination are useful as a polymer processing additive synergist. Polymer processing additive compositions, homogeneously catalyzed olefin compositions, and other extrudable polymer compositions including a poly(oxyalkylene) polymer and a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate are disclosed. Methods of reducing melt defects during the extrusion of a thermoplastic polymer, which may be a homogeneously catalyzed polyolefin, are also disclosed.

A method of extruding a melt of a linear low-density polyethylene (LLDPE) without surface melt fracture, the method comprises heating a melt of the LLDPE to a temperature from 190.0 to 260.0 degrees Celsius; and extruding through a die the heated melt at a shear rate of from 1,100 to 7,000 per second and at a shear stress of greater than 0.40 megapascal, thereby forming a polyethylene extrudate without surface melt fracture.

A charging system for feeding processing material to at least one extruder screw including a hopper configured to conduct the processing material along a feed direction to the extruder screw, and a material reservoir for the gravity-driven feeding of the processing material to the hopper. The charging system also includes a feeding device via which processing material recirculated at the hopper against the feed direction by action of the extruder screw can again be conveyed in the direction of the extruder screw together with processing material fed from the material reservoir.

A system for adjusting a gap in a slot die for producing a polymeric web. The system includes a slot die that has a polymer reservoir that extends between a polymer inlet and a melt outlet. The melt outlet has a first edge and a second edge that each extend longitudinally along the melt outlet. The second edge is opposite the first edge. A plurality of actuators move the second edge along a plurality of positions along a length of the second edge. The first edge is spaced apart from the second edge by a gap that has an adjustable profile. A pressure sensor communicates with the reservoir and measures the pressure of the polymer in the reservoir. A control unit with an algorithm correlates the profile of the gap to the pressure in the reservoir. The algorithm is configured to generate control signals to cause the profile of the gap to be uniform.

Additive manufacturing apparatus and methods for mixing and dispensing materials, and articles with controlled particle concentrations. Additive manufacturing apparatus includes a mixer; a reservoir in fluidic communication with the mixer; and a build plate parallel to the reservoir. Additive manufacturing apparatus includes a mixer and a solid particle dispensing system and/or a slurry dispensing system. A method for handling precursors during additive manufacturing includes (a) providing first and second precursor materials and/or a slurry to a mixer; (b) mixing the materials in the mixer; (c) transporting the mixed materials directly to a reservoir disposed in parallel with a build plate; (d) curing at least a portion of the transported and mixed materials; and (e) repeating step (d) at least once. An article includes a plurality of adjacent layers, a concentration of particles in each layer defining a controlled concentration gradient and/or vary by no more than ±50%.