A single-screw extruder for conveying and plasticizing a meltable material, including a screw and a heated cylinder, wherein the screw is rotatably held in the heated cylinder, the screw has a core and a helical main flight, which is at a first distance from the internal wall of the cylinder, a region of a transition zone and a melting zone has at least two successive, non-overlapping barrier portions, and a cylinder-side outside flight surface of one or more overflow flights is chamfered in full or in part over a flight width such that a conical gap that gets narrower in an overflow direction is formed between the internal wall of the cylinder and the cylinder-side outside flight surface.

An extruder (1) includes a cylinder (2) and a screw (3), and one or more front vents (8a) are provided on the cylinder (2) upstream of a hopper (5) and downstream of a rear vent (7). The cylinder (2) is provided with, between the hopper (5) and the rear vent (7), a liquid supply device (9) for spraying water into the cylinder (2) to cool an interior thereof and a liquid discharge port (12) that is opened in a lower portion of the cylinder (2).

The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length L.sub.K of the kneading zone to an effective length L.sub.S of the screw (L.sub.K/L.sub.S×100) is 21.0 to 50.0%.

In this specification, a method for the manufacture of solid dosage forms is disclosed. The method includes extruding a plasticized matrix through an exit port of an extrusion channel to form one or more plasticized fibers, structuring said fibers to a three dimensional structural network by patterning on a translating or rotating stage, and solidifying the patterned structure.

A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.

A polymer composition comprising carbon nanostructures dispersed within a polymer matrix that includes a thermoplastic polymer having a deflection temperature under load of about 40° C. or more as determined in accordance with ISO 75:2013 at a load of 1.8 MPa and a melting temperature of about 140° C. or more is provided. The carbon nanostructures include carbon nanotubes that are arranged in a network having a web-like morphology and optionally disposed on a substrate.

A single-screw extruder (100), and a method. The extruder (100) comprises—a cylindrical rotor member (1) having diameter (D) and length (L) and comprising a feeding zone (14), —the rotor member (1) arranged in a barrel (2), —the cylindrical surface of the rotor member (1) carrying cavity/cavities and/or projection(s) (5) arranged in helically extending rows, —the helically extending row(s) of the rotor member (1) having a pitch (P) and depth (d) in the feeding zone (14) of the rotor member, and the extruder (100) further compris-ing—a drive system (4) for the rotation of the rotor member (1) in the barrel (2). The relation of the depth (d) to the diame-ter (D) of the rotor member, i.e. d:D, is not more than 1:20, and the relation of the pitch (P) of the rotor member to the di-ameter (D) of the rotor member, i.e. P:D, is not more than 1:4.

An extruder and a long fiber thermoplastic (LFT) extrusion member manufactured thereby, and the extruder uses the LFT as a raw material to produce LFT extrusion members such as LFT sheets, pipes and profiles by a continuous extrusion molding process. The structural improvement of the extruder screw, including the screw body having three different thread groove deep sections, in sequence, a feed section, a compression section and a metering section, so that the LFT extrusion member produced by the extruder has high strength, high stiffness, high dimensional stability, low warpage and resistance to creep.

A rubber extrusion device comprises a control plate having an adjustment flow path communicating with an extrusion flow path formed in a head and an extrusion port formed in a die is interposed between the head and the die; the control plate is slid along and between the head and the die to change a position of a communication region of the extrusion flow path with respect to the adjustment flow path at a leading end opening of the extrusion flow path to set the control plate at a desired position; and unvulcanized rubber, obtained by mixing and kneading rubber material while extruding the rubber material forward with a screw, passes through the extrusion flow path and the adjustment flow path to be extruded from the extrusion port.

The present invention discloses an LCP film production apparatus and method. The apparatus includes: a rack; a screw extrusion device; a T-shaped material port; a squeezing assembly, where the squeezing assembly includes a first roller wheel, a second roller wheel, and a third roller wheel, the first roller wheel and the second roller wheel are fixedly mounted directly below the T-shaped material port side by side, and the third roller wheel is fixedly mounted next to the second roller wheel side by side; and an electromagnetic field generator, fixedly connected to the T-shaped material port and mounted around the T-shaped material port in a circle by means of bolts, where the screw extrusion device is fixedly mounted at the top of the rack, and the T-shaped material port is fixedly mounted on one end of the screw extrusion device. According to the present invention, a field generated by the electromagnetic field generator can disrupt the ordered arrangement of LCP molecules, thereby alleviating or even eliminating the anisotropic problem of transverse and longitudinal tensile strength thereof.