An extruder screw conveying raw materials while kneading them includes a screw main body, conveyance portions, barrier portions, and paths. The conveyance portions convey the raw materials in an axial direction. The paths each include an entrance and an exit. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in the same direction as a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position outside the conveyance portions in which the entrance is opened.

Provided is a kneading device that can check a progress of wear of an inner wall face of a kneading chamber provided in a casing without stopping the kneading device. A kneading device includes a sensor-mount space provided in a wall of a casing, a wear detecting sensor of which a detecting section is disposed at a bottom of the sensor-mount space, and a controller that receives a signal output from the wear detecting sensor, the controller including a wear determining unit that determines that wear of an inner wall face of a kneading chamber has progressed based on a change in the signal.

An extruding system includes a mixing unit configured to mix a polymeric material with a blowing agent and to form a mixture, and an injection unit coupled to the mixing unit and configured to inject the mixture. The mixing unit includes a mixing cartridge, a first mixing screw and a second mixing screw, the first and second mixing screws are disposed in the mixing cartridge. A method of extruding a mixture includes mixing a polymeric material and a blowing agent in a mixing cartridge of a mixing unit by at least one of a first and second mixing screws to form the mixture; conveying the mixture from the mixing unit to an injection unit; and discharging the mixture from the injection unit into a molding device. The mixture is sequentially in contact with the first mixing screw and the second mixing screw.

A molded product production system includes a powdery material mixing and feeding device configured to feed mixed powdery materials including at least two types of powdery materials, a filler configured to fill, with the mixed powdery materials fed by the powdery material mixing and feeding device, a die bore of a compression-molding machine, a sensor configured to measure a mixing degree of the mixed powdery materials fed by the powdery material mixing and feeding device, and a molded product removal mechanism configured to distinguish a molded product obtained by compression molding mixed powdery materials having a mixing degree measured by the sensor out of a predetermined range from a molded product obtained by compression molding mixed powdery materials having a mixing degree within the predetermined range.

The invention describes an advanced mixing and metering technology with online analytics for a supply of formulated liquid thermosetting resins into an open or closed mold. The application addresses where a precise control of the composition of formulated components is required. Composite structures used in primary and secondary structural aerospace applications manufactured in Infusion or RTM processes are possible examples.

An extruder screw conveying raw materials while kneading them includes a screw main body, conveyance portions, barrier portions, and paths. The conveyance portions convey the raw materials in an axial direction. The paths each include an entrance and an exit. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction. The exit is opened in the outer circumferential surface of the screw main body at a position outside the conveyance portions in which the entrance is opened.

Method for manufacturing a composite material, comprising the following steps: a) plasticizing a binder in an extruder, wherein the binder comprises a polymer; b) providing a mixture of a cellulosic material and a hydrophobic agent dissolved and/or dispersed in a liquid carrier; c) mechanically shearing and drying the mixture in an extruder whereby liquid is at least partly extracted from the mixture or is not present in liquid form anymore; and d) blending the dried mixture with the plasticized binder.

A conveyer module, small fragments of which are detectable by X-ray and magnetic sensors, is formed from a compounded mixture of a polyketone, stainless steel powder, and barium sulfate powder. The thermoplastic polymer comprises a polyketone constituting less than 95.5% by weight of the mixture. The stainless steel constitutes at least 0.5% by weight of the mixture, and the barium sulfate constitutes at least 4% or more by weight of the mixture.

A method of filling a mold comprising filling a majority of a mold cavity with an extrudate from at least one extruder wherein the extrudate, which is conveyed to an inlet of the mold, is at a pressure of 1-500 psi, subsequently isolating the mold cavity from a conduit which conveys the extrudate to the mold cavity, and subsequently using a pressurization member to fill a remainder of the mold cavity with additional extrudate, wherein the pressurization member excepts a pressure above 500 psi on the additional extrudate.

A process for reducing the hydrophobic functional group-containing volatile organic compound content and hydrophilic volatile organic compound content of recycled polyolefin comprising an acid washing step followed by an alkaline/neutral washing step.