A method and an apparatus for extrusion of fiber-reinforced plastic material for the additive manufacture of a component is disclosed. The fiber-reinforced plastic material is supplied to the extrusion apparatus and heated in a heating zone of the extrusion apparatus in order to then supply the fiber-reinforced plastic material to an extrusion nozzle of the extrusion apparatus, at which a material thread comprising fiber-reinforced plastic material is extruded for the component to be manufactured. In order to convey the fiber-reinforced plastic material through the heating zone, a screw conveyor of the extrusion apparatus is utilized, which has a length-diameter ratio of less than a set value. In the heating zone a maximum volume is provided for the fiber-reinforced plastic material and a rotational speed of the screw conveyor is limited to a maximum of speed.

An easily tearable film includes polyamide resin components including more than 20 parts by mass and 70 parts by mass or less of a semi-aromatic polyamide resin A and less than 80 parts by mass and 30 parts by mass or more of an aliphatic polyamide resin B; wherein the semi-aromatic polyamide resin A is constituted of a diamine-derived constituent unit and a dicarboxylic acid-derived constituent unit; 60 mol % or more of the diamine-derived constituent units are derived from metaxylylenediamine; 60 mol % or more of the dicarboxylic acid-derived constituent units are derived from an α,ω-linear aliphatic dicarboxylic acid having from 4 to 10 carbons; and the molar concentration of phosphorus atoms, the total molar concentration of alkali metal atoms and the total molar concentration of alkaline earth metal atoms, and Mn of the semi-aromatic polyamide resin satisfy predetermined relationships.

A sealing device for sealing the intermediate space between a housing and a shaft rotatably mounted in the housing, having a first plate-shaped body with a front face, a rear face, and a first opening, which extends from the front face to the rear face and is suitable for feeding through the shaft, and having a cooling line, which runs in the body and is suitable for conducting a cooling medium. The first body is suitable for being tightly secured to the housing such that the shaft rotatably mounted in the housing is guided through the first opening. The first opening is suitable for introducing sealant such that the sealant seals an intermediate space between the shaft and the first body. The cooling line is guided around the first opening between a cooling line inlet and a cooling line outlet for the cooling medium such that heat produced from rotating the shaft can be dissipated by the cooling medium in a spatially homogenous manner.

A nozzle assembly for a printer head of a 3D printer includes a guide held in a fixed position relative to the printer head and extending from a first end to a second end along a longitudinal axis. A drive mechanism extends from a feed end to a discharge end along the longitudinal axis. The feed end defines a feed opening for receiving a filament from a feed system, and the discharge end defines a discharge opening for discharging the filament from the nozzle assembly. The drive mechanism is movable relative to the guide, and the drive mechanism includes a drive surface for engaging the filament and causing the filament to move from the feed opening to the discharge opening, in response to the drive mechanism moving relative to the printer head. The nozzle assembly further includes a motor for moving the drive mechanism relative to the printer head.

An extruder screw includes a screw body. The screw body is rotated about an axis parallel to a direction of conveyance of a raw material. A conveyance portion having a flight is provided on the outer peripheral surface of the screw body. The flight is configured to convey the raw material along the axis of the screw body when the screw body is rotated. A passage for permitting the raw material fed by the flight to pass therethrough to the outer peripheral surface of the screw body is provided in the screw body in a position deviated from the axis of the screw body.

A modular extrusion system for forming an article includes a support frame and a plurality of print head modules removably connected to the support frame. Each of the print head modules includes a printer head, a printer nozzle, a hopper, and an integrated control module. The hoppers are configured for holding a plurality of polymer pellets. The printer heads of the plurality of print head modules each include a body defining a barrel, a rotating extrusion screw extending through the barrel, and one or more heaters at least partially surrounding the barrel for melting the plurality of polymer pellets into a polymer resin formulation. The printer nozzles are configured for printing and depositing the polymer resin formulation onto a substrate to form the article. The modular extrusion system also includes a control system communicatively coupled to each of the integrated control modules for controlling the modular extrusion system.

An extruder screw for the plasticizing of at least one plastic material or a plastic material mixture, with a melting zone, a wave zone and a mixing zone arranged between the melting zone and the wave zone, wherein a conveying web extending in a helix-like manner along a screw longitudinal axis is formed in the melting zone and in the wave zone, wherein a conveying web of the melting zone terminates at an end of the melting zone facing the mixing zone, and a conveying web of the wave zone begins at an end facing the mixing zone. The application also relates to an extrusion device with this extruder screw, and a method for plasticizing at least one plastic material or a plastic material mixture.

Exemplary embodiments are disclosed of systems and methods for dispensing thermal management and/or EMI mitigation materials. The system and methods include online remixing prior to dispensing the thermal management and/or EMI mitigation materials. In an exemplary embodiment, a system includes an online remixer configured to be operable for receiving a supply of the thermal management and/or EMI mitigation material including one or more functional fillers within the matrix, and remixing the one or more functional fillers including filler settlement, if any, within the matrix prior to dispensement of the thermal management and/or EMI mitigation. The remixing may reduce the filler settlement, if any, within the matrix and thereby allow for improved viscosity and flow rate of the thermal management and/or EMI mitigation material.

A mixing device includes a base, a side tube and a primary extruder screw. The base includes an upper case body and a lower case body cooperating with each other to define an accommodating space. The upper case body has a first inlet and a second inlet communicating with the accommodating space and adapted respectively for passage of two materials into the accommodating space therethrough. The lower case body has a third inlet communicating with the accommodating space. The side tube cooperates with the third inlet to be adapted for passage of elastic fillers into the accommodating space therethrough. The primary extruder screw is operable for mixing the elastic fillers with a reaction product made by the two materials to form a molding material.

Disclosed is a novel 3D-printer system for printing elastically deformable rubber parts such as rubber seals where the uncured rubber source material is partially cured before printing each rubber layer of the rubber part. Furthermore, disclosed is a novel 3D printing method for 3D-printing an elastically deformable rubber body using the 3D-printer system.