A nozzle device for producing a random-laid fiber product including a melt nozzle having an arrangement of a plurality of melt channels. The nozzle device including a gas channel having an opening which is associated with a plurality of melt channels of the arrangement, wherein the gas channel is designed to produce a gas emission which the melt emitted from the melt channels collects. The melt nozzle including an arrangement of capillary tubes in order to form the melt channels. A method for producing a nozzle device including providing of a nozzle body having one or more receiving channels and the arranging and fastening of capillary tubes in the one or more receiving channels.

A system and method for reducing draw resonance of a plastic material in molten state, so-called melt, leaving an extrusion group of a plant for the production of plastic film, includes at least one thermostatically-controlled cylinder, having an embracement angle of the melt on the cylinder that is adjustable on the basis of the process rate, i.e., the linear movement speed of the plastic film, and/or on the basis of the temperature measured in the proximity of or in correspondence with the clamping area of the melt in a thermoforming, calibration and cooling group included in the plant and positioned downstream of the system.

A device and method for the production of a tubular film in a blown film method with a blown film line. It includes a lay-flat device and a takeoff device with a pair of take-off rolls, in which the tubular film can be laid flat, and at least one venting device of the previously flattened tubular film. The deaerating device includes a movement device for a cutting device with cutting elements and is arranged in the transport direction of the flattened tubular film downstream of the pair of take-off rolls so that the flattened tubular film can be slit and deaerated by the deaerating device.

A guiding and calibration device (100) of a blown plastic film is described, comprising a bearing structure (1, 2) which includes equidistant rotation fulcrums (3) of rotating structures (4) along an ideal circumference. Each rotating structure (4) comprises a rotating vertical upright (43) and at least one arm (44, 45) fixed to said rotating vertical upright (43). A vertical floating element (5) is rotatably fixed to the at least one arm (44, 45). The device (100) further comprises groups of rectilinear bars (12a, 12b) consisting of at least one pair of rectilinear bars (12a, 12b) parallel to each other and placed slidingly side by side along respective external edges.

The present invention relates to a method for continuously manufacturing UHMWPE products comprising:—providing a counter-rotating twin-screw extruder;—feeding UHMWPE powder into a hopper of said counter-rotating twin-screw extruder;—transporting said UHMWPE powder from said hopper through said counter-rotating twin-screw extruder to an outlet of said counter-rotating twin-screw extruder;—further transporting said UHMWPE powder from said outlet of said counter-rotating twin-screw extruder to an entrance of a heat-controlled tooling system for defining the shape of UHMWPE products;—withdrawing said UHMWPE products from an outlet of said heat-controlled tooling system.

An apparatus for starting an extrusion process, including at least a drawing device having a main frame, a platform arranged on the main frame, a cable winch arranged on the platform and having a drum, and a wire cable that can be wound up on the drum of the cable winch and pulls an extruded plastics pipe in an extrusion line by way of deflection rolls until the pipe is taken over by a take-off device, wherein the platform is movable transversely to an extrusion direction.

A method for producing a tube, which includes: extruding a melt-fabricable fluororesin from a mold of an extruder into a form of a tube, leading the extruded melt-fabricable fluororesin to a cooling device to cool the extruded melt-fabricable fluororesin, and winding a resulting cooled tube onto a winding reel using a winding device. A gas is fed from a head end of the tube wound onto the winding reel into a hollow of the tube, the gas in the hollow is allowed to pass through a gas-introducing entrance of the mold and then through a gas-discharging hole of the mold to discharge the gas outside, thereby allowing the gas to flow along the hollow, and an internal pressure of the hollow is kept higher than atmospheric pressure and lower than 0.5 kgf/cm.sup.2.

A method for producing a tube, which includes: extruding a melt-fabricable fluororesin from a mold of an extruder into a form of a tube, leading the extruded melt-fabricable fluororesin to a cooling device to cool the extruded melt-fabricable fluororesin, and winding a resulting cooled tube onto a winding reel using a winding device. A gas is fed from a head end of the tube wound onto the winding reel into a hollow of the tube, the gas in the hollow is allowed to pass through a gas-introducing entrance of the mold and then through a gas-discharging hole of the mold to discharge the gas outside, thereby allowing the gas to flow along the hollow, and an internal pressure of the hollow is kept higher than atmospheric pressure and lower than 0.5 kgf/cm.sup.2.

A cooling apparatus includes a conveying means which conveys a resin composition formed into a sheet shape along a direction parallel to a surface of the sheet-shaped resin composition and a cooling means which cools the resin composition being conveyed by the conveying means. A temperature of the resin composition just before being cooled by the cooling means is in the range of 40 to 60° C. and the cooling means has a cooling ability to cool the resin composition such that a cooling rate of the resin composition is in the range of 0.2 to 5° C./min. Further, the cooling means includes a fan section having at least one outlet port which discharges cooling air of which temperature is in the range of −40 to 0° C. to the resin composition.

A weatherable, low heat build-up capstock system comprising an acrylic cap, a pigment system that is IR transparent to a greater degree than existing pigment systems, an IR reflective substrate, and an extrusion system for same.