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 extruded thermoplastic composition includes: (a) from about 20 wt % to about 75 wt % of a ceramic fiber component; (b) from about 15 wt % to about 70 wt % of a polybutylene terephthalate (PBT) component including a high molecular weight PBT and a low molecular weight PBT; (c) from about 5 wt % to about 23 wt % of a polycarbonate component; and (d) from about 1 wt % to about 10 wt % of a compatibilizer component. Methods of making the extruded thermoplastic composition are also described.

Calibration method for machines for the production of segmented extruded products comprising the steps of: activating an extrusion process according to a plurality of operating parameters suitable for producing a segmented extruded product having at least one segmentation portion (6); injecting a marker at the segmentation portion (6) during its extrusion; detecting a plurality of characterizing parameters of the marker and/or of the segmentation portion (6), by selecting at least one of spatial distribution of the segmentation portion (6) and axial and/or radial position of the segmentation portion (6); selecting at least one operating parameter according to at least one of the detected characterizing parameters, so as to modify spatial distributions and/or axial and/or radial positions of the segmentation portion (6).

The present development is an extrusion coated barrier film with perforated holes for breathability and a moisture vapor barrier. More specifically, the coated barrier material comprises biaxially oriented nylon film extrusion coated with a blend of an acid copolymer and at least one block copolymer material made up of rigid polyamide blocks and soft polyether blocks. The extrusion coated barrier film can be thermally laminated to expanded polystyrene (EPS) foam boards, which can be used as housewrap, roofing underlayment, or in other construction materials.

Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

An additive manufacturing system, which can include a 3D printer, includes in at least one aspect: a build platform; a carriage and a rack configured to hold different manufacturing tools, including an extrusion tool; a heating device associated with the extrusion tool; a 3D motion system configured to move the carriage between the rack and a build space associated with the build platform, and to move the carriage within the build space associated with the build platform; and one or more computers programmed to trigger the heating device to begin pre-heating the extrusion tool at a point before mounting of the extrusion tool to the carriage by the 3D motion system, such that the material in the extrusion tool is melted by a point in the manufacturing process when the extrusion tool will be mounted on the carriage and in position to extrude material in the build space.

A molding method of a resin molded product in which it is possible to increase the welding strength between the core member and the resin sheets. In a molding method of a resin molded product in which a core member including a foaming element is interposed between at least two resin sheets in a melted state into a laminated product, wherein the resin sheets include fibrous filler, and while melting surfaces of the core member by heat of the resin sheets, the core member and the resin sheets are welded onto each other, and the core member and the resin sheets are clamped by a metallic mold, to mold the resin molded product.

A method of enhancing surface electrical conductivity of an article formed of a conductive polymer material, such as a conductive polymer film, includes the step of providing an article formed of a conductive polymer. The conductive polymer is made up of a dielectric polymeric material and conductive fibers. A desired pressure is applied to at least a portion of the article while simultaneously heating at least a portion of the article to a desired temperature. The desired pressure and the desired temperature are maintained on at least a portion of the article for a desired time period. This method reduces a polymer-rich skin layer on the surface of the conductive polymer material and helps to randomize the orientation of the conductive fibers on the surface.

The present specification generally relates an aliphatic polyester material and a process for converting said aliphatic polyester material into a textile that is preferable for use as an artificial leather substrate. The present invention discloses: (i) a novel aliphatic polyester composition comprising a polyhydroxyalkanoate (referred to herein as PHA), an ethylene-vinyl acetate copolymer resin (referred to herein as EVA) or similarly functional such material, and an ester of citrate acid plasticizer or similarly functional such material; and (ii) an inventive process for converting the novel aliphatic polyester composition into a textile by (a) melt extruding the aliphatic polyester material into an aliphatic polyester sheet; (b) heating said sheet; and (c) monoaxially or biaxially orienting said sheet in the machine direction followed by orientation in the transverse direction; and/or heating the monoaxially or biaxially oriented sheet at a temperature above the Tg of both the polyhydroxyalkanoate and ethylene-vinyl acetate resin components but below the melting point of the polyhydroxyalkanoat component.

The invention describes a process for starting up a film production in a film manufacturing machine, in particular a blown film machine, by means of a control device, comprising the following steps: detecting a start-up request setting start-up parameters providing film material commencing the film production setting film production parameters.