The apparatus of the invention includes: an acquisition unit 101 that acquires input information including resin properties and acquires, as output information, a specified value of a physical quantity related to a kneaded resin or a kneading machine; a storage unit 16 that stores a knowledge file 162 containing correlations among the input information, the physical quantity and a plurality of screw configurations; and a search unit 106 and a configuration generator unit 107 together that infers, on the basis of the input information and the knowledge file 162, such a screw configuration that is able to meet the specified value.

A method for directly preparing a foamed polylactic acid (PLA) product from a PLA melt includes PLA melt preparation, feeding, and two-stage extrusion. In the two-stage extrusion, a pressure at an outlet of a first-stage twin-screw extruder is 15 MPa to 17 MPa, a PLA melt is fed at a rate of 250 kg/h, a foaming additive is fed at a rate of 7.5 kg/h to 10 kg/h, and a foaming gas is fed at a rate of 2.8 L/h to 7.5 L/h. The method can ensure both foamability and quality of a material and reduce more than ⅓ of energy consumption; and an obtained product has an adjustable foaming rate of 3 to 25, a crystallinity of 40.3% to 48.5%, a tensile strength of 8.7 MPa to 19.6 MPa, and an apparent density of 0.05 g/cm.sup.3 to 0.4 g/cm.sup.3.

An extruder screw for plasticizing at least one plastic or plastic mixture, including a melting zone, a shaft zone and a mixing zone arranged between the melting zone and the shaft zone, wherein a conveying flight is formed in the melting zone and in the shaft zone, which extends helically along a longitudinal axis of the screw, wherein a conveying flight of the melting zone ends at an end of the melting zone towards the mixing zone and a conveying flight of the shaft zone begins at an end towards the mixing zone. A flight depth of the melting zone continuously decreases along the longitudinal axis of the screw to the mixing zone. Further, an extrusion device having the extruder screw and to a method for plasticizing at least one plastic or plastic mixture.

A screw with a spiral blade for extruding a plastic elastomer while kneading the plastic elastomer, the screw includes a kneading region where the spiral blade is provided with cutout portions being configured to pass pins, and a plasticizing region being arranged on a downstream side in an extrusion direction of the kneading region. The plasticizing region includes a barrier extending between portions adjacently in the extrusion direction of the spiral blade.

A screw with a spiral blade for extruding a plastic elastomer while kneading the plastic elastomer, the screw includes a kneading region where the spiral blade is provided with cutout portions being configured to pass pins, and a plasticizing region being arranged on a downstream side in an extrusion direction of the kneading region. The plasticizing region includes a barrier extending between portions adjacently in the extrusion direction of the spiral blade.

A no solid bed extruder screw for processing a material to a molten state has a body with a helical thread formed thereon, the thread having pushing and trailing surfaces. The body has an outer surface and extends longitudinally between feed and discharge ends. A channel for receiving the material to be processed is defined between the outer surface of the body and an outer diameter of the thread bounded by the pushing surface and the trailing surface of the thread. A volume of the channel decreases in a plurality of revolutions of the thread in a direction from the feed end to the discharge end. A channel depth between the pushing surface and the trailing surface decreases for a first portion of the channel toward the feed end and increases for a second portion of the channel toward the discharge end.

Recently, we have introduced fibrous dosage forms that enable predictable microstructures with a greater range of pharmaceutically relevant properties. Presented herein, accordingly, is a method for the manufacture of such fibrous dosage forms. The method includes extruding a plasticized matrix through an exit port of an extrusion channel to form one or more plasticized fibers, structuring said fibers to a three dimensional structural network by patterning on a translating or rotating stage, and solidifying the patterned structure.

A system and method are presented in which a flow of plastic is extruded to obtain nano-sized features by forming multiple laminated flow streams, flowing in parallel through the non-rotating extrusion system. Each of the parallel laminated flow streams are subjected to repeated steps in which the flows are compressed, divided, and overlapped to amplify the number of laminations. The parallel amplified laminated flows are rejoined to form a combined laminated output with nano-sized features. The die exit is formed to provide a tubular shape.

Provided are a rubber material supplying method and a rubber material supplying device, whereby a rubber material can be smoothly supplied to a rubber inlet even when the width of the rubber material is greater than the width of the rubber inlet. The rubber material supplying method includes a separation step S1, a processing step S2, and an input step S3. In the separation step S1, a plurality of different cutouts 30 are formed in a leading end section GF of a rubber material G, and the leading end section GF is separated into three or more strip shape sections 31. In the processing step S2, second strip shape sections B, and not first strip shape sections 31A, among the plurality of strip sections 31 are each cut out or folded. In the input step S3, the leading end section GF is input to the rubber inlet 3A from the first strip shape sections 31A.

A screw includes a screw main body, a conveyance portion conveying a raw material, and a passage provided in the screw main body. The passage includes a first passage element, a second passage element, and a third passage element. The screw main body has a plurality of cylindrical bodies arranged in an axial direction of the rotating shaft. At least a portion of the conveyance portion is formed on outer peripheral surfaces of the cylindrical bodies adjacent to each other, and the passage is formed in the cylindrical body so as to cross over between the adjacent cylindrical bodies.