A production method for a resin molding includes: preparing fiber-reinforced resin by continuously feeding a long roving containing a reinforcing fiber, with its length unchanged, into base resin that has been heated to be plasticized; forming a resin molding using the fiber-reinforced resin; and heating the formed resin molding in a non-oxidizing atmosphere.

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.

An object is to manufacture molded bodies having a small variation among products even if the mixture amount of a metal powder is increased when molding is performed by directly introducing not only a metal powder but also a powdered resin into an injection molding machine. In a metal powder mixed resin molded body manufacturing method for manufacturing a molded body by kneading a molding material including a metal powder, a thermoplastic resin powder, and an additive agent, molding is performed by an injection molding machine in which a molding screw is arranged. The molding screw of the injection molding machine includes a feeding portion, a compressing portion, and a metering portion that are continuously and integrally provided, the feeding portion and the compressing portion are constituted by an one-line spiral flight, the flight of the compressing portion includes a plurality of sub-flights that extend in a spiral manner in a screw axis direction and the sub-flights each have a polygonal shape with rounded corner portions, and the sub-flights are arranged such that the corner portions are shifted by a set angle in a circumferential direction about the screw axis, and the metering portion is provided with a plurality of blending/aligning portions each having gear-like protrusions and recesses in a circumferential direction about the screw axis.

The present invention relates to a volume pulsed deformation plasticating and conveying method and device by an eccentric rotor. The rotation of the eccentric rotor and the rolling of the rotor in the inner cavity of a stator during constant reverse revolutions cause the volume of the material between the eccentric rotor and the stator to periodically change alternatively along the axial direction and the radial direction of the stator, thereby enabling the volume pulsed deformation plasticating and conveying of the material. The volume pulsed deformation plasticating and conveying device consists of a stator, of which the inner cavity comprises multiple alternatingly disposed spiral segments and straight segments, and an eccentric rotor comprising multiple alternatingly disposed eccentric spiral segments and eccentric straight segments. The eccentric rotor is disposed in the inner cavity of the stator. The eccentric spiral segments and the eccentric straight segments of the eccentric rotor correspond one-to-one with the spiral segments and straight segments of the stator. The present invention can be used as the extruding system of an extruder or be combined with different plunger injection units to form a plasticating injection device of an injection molding machine. The present invention has a short thermo-mechanical distance for the materials, low energy consumption, and wide adaptability.

A wood powder fiber reinforced polyolefin-based resin composition contains: a matrix polyolefin-based resin which is not a polyethylene; a wood powder fiber; an acid-modified polyethylene; and an olefin-based or styrene-based elastomer, wherein the wood powder fiber is embedded in contact with the acid-modified polyethylene, or contains 45 mass % to 65 mass % of a matrix polyolefin-based resin which is not a polyethylene; 5 mass % to 30 mass % of a wood powder fiber; an acid-modified polyethylene in an amount of 0.25 to 4.0 times the mass % of the wood powder fiber; and 10 mass % to 30 mass % of an olefin-based or styrene-based elastomer, wherein the acid-modified polyethylene is present in contact with a periphery of the wood powder fiber, and the elastomer is present in contact with a periphery of the acid-modified polyethylene or is present independently of the acid-modified polyethylene.

A wood powder fiber reinforced polyolefin-based resin composition contains: a matrix polyolefin-based resin which is not a polyethylene; a wood powder fiber; an acid-modified polyethylene; and an olefin-based or styrene-based elastomer, wherein the wood powder fiber is embedded in contact with the acid-modified polyethylene, or contains 45 mass % to 65 mass % of a matrix polyolefin-based resin which is not a polyethylene; 5 mass % to 30 mass % of a wood powder fiber; an acid-modified polyethylene in an amount of 0.25 to 4.0 times the mass % of the wood powder fiber; and 10 mass % to 30 mass % of an olefin-based or styrene-based elastomer, wherein the acid-modified polyethylene is present in contact with a periphery of the wood powder fiber, and the elastomer is present in contact with a periphery of the acid-modified polyethylene or is present independently of the acid-modified polyethylene.