A method for production of a molded article from a base substance in a device for mixing of the base substance with a solvent is provided. The method includes mixing a base substance to produce a molding solution with the solvent and at least partially removing the solvent from the mixture; and feeding the molding solution to a device for further processing of a product and diluting the molding solution before further processing. In embodiments, the diluent is introduced to the device before a discharge device and/or in the discharge device.

The invention discloses a central air extraction type pipe extrusion core mold assembly runner and a two-channel air extraction core mold assembly and belongs to the technical field of plastic pipe extrusion. The central air extraction type pipe extrusion core mold assembly runner comprises a core mold assembly and an extruder screw barrel; and a splitter plate arranged between the core mold assembly and the extruder screw barrel. The two-channel air extraction core mold assembly further comprises an air inlet pipe coaxial with the central air extraction pipe. The inner wall of a pipe product is cooled by way of air extraction by the central air extraction pipe, and the inner wall of the core mold assembly is cooled by way of air extraction by the in-mold cooling channel, thereby ensuring product quality and extrusion efficiency.

A multi-screw extruder includes a drive mechanism operable to output a torque through a drive shaft, a plurality of extruder screws each operably coupled to the drive shaft to rotate in response to the torque, each of the extruder screws and including a shaft and a thread, an elongated barrel body defining a plurality of isolated screw compartments extending therethrough and each receiving one of the plurality of extruder screws therein, each screw compartment isolated from each of the other screw compartments along a length of the barrel body, a heater substantially circumscribing each of the screw compartments and operable to provide a heat flux into each of the screw compartments, a common collection chamber in fluid communication with each screw compartment, and a nozzle in fluid communication with the common collection chamber including a material outlet through which a molten printing material may be discharged from the extruder.

An extruder includes a cylinder 2 and a die 5 attached to the cylinder 2. The die 5 has a resin flow path portion 22 to which a molten resin is supplied from the cylinder 2 and a hole 21 which is connected to the resin flow path portion 22 and from which the molten resin is discharged. The extruder further includes a pressure measurement unit 31 configured to measure a pressure of the molten resin in the cylinder 2 or the die 5 and a calculation unit configured to calculate a viscosity of the molten resin based on a measured value of the pressure measurement unit 31.

A manufacturing method of a fiber includes: mixing and stirring a plurality of raw materials, to form a mixed liquid, where the plurality of raw materials includes dry copper nanopowder with a particle size not more than 48 nm, a fiber slurry, and an additive; drying the mixed liquid, to remove moisture of the mixed liquid and form a processed raw material; heating the processed raw material, to make the processed raw material be in a semi-molten state; electrifying the processed raw material in the semi-molten state, and then extruding at least one fibril from the processed raw material in the semi-molten state; stretching the at least one fibril; and performing cooling and shaping on at least one stretched fibril, to form a final fiber product.