An apparatus changes the temperature of thermoplastic material in an extruder head to reduce the time for producing an object. The apparatus includes a cooling device located near the one or more nozzles of the extruder head to change the temperature of the thermoplastic material extruded by the extruder head. The apparatus cools the thermoplastic material to enhance the formation of exterior object features. A heater can also be positioned near the nozzle zone to heat the thermoplastic material to reduce the time for raising the viscosity of the thermoplastic material for forming interior regions of the object.

An apparatus changes the temperature of thermoplastic material in an extruder head to reduce the time for producing an object. The apparatus includes a cooling device located near the one or more nozzles of the extruder head to change the temperature of the thermoplastic material extruded by the extruder head. The apparatus cools the thermoplastic material to enhance the formation of exterior object features. A heater can also be positioned near the nozzle zone to heat the thermoplastic material to reduce the time for raising the viscosity of the thermoplastic material for forming interior regions of the object.

An extrusion device includes a material inlet for feeding an extrusion material into the extrusion device; a material outlet, which is arranged opposite the material inlet along an axis, in order to expel the extrusion material from the extrusion device; a material guidance system for guiding the extrusion material from the material inlet to the material outlet; a body, which is arranged on the axis, is movable along the axis, passes through the material outlet and is designed in such a way that, as the body moves along the axis, a cross-sectional area through which the extrusion material is expelled from the material outlet changes; a drive device, arranged along the axis, for moving the body along the axis; a cooling line system for guiding coolant. Here, a first part of the cooling line system is arranged in the interior of the body and is suitable for guiding the coolant along the axis, a second part of the cooling line system is suitable for guiding the coolant out of the body away from the axis and for conducting said coolant around the drive device, and a third part of the cooling line system is suitable for guiding the coolant outwardly into a discharge line for the coolant at an incline to the axis. The second part of the cooling line system adjoins the first part of the cooling line system, and the third part of the cooling line system adjoins the second part of the cooling line system against a flow direction of the extrusion material from the material inlet to the material outlet.

The present disclosure provides a novel method of 3D printing using frontal polymerization chemistry. This method enables the printing of tough, high quality thermosets in a short time with the option of adding fiber reinforcement. As such, it facilitates fabrication of mechanically robust 3D-printed devices and structures.

The present disclosure provides a novel method of 3D printing using frontal polymerization chemistry. This method enables the printing of tough, high quality thermosets in a short time with the option of adding fiber reinforcement. As such, it facilitates fabrication of mechanically robust 3D-printed devices and structures.

In the method for the continuous production of a heat-insulated, corrugated line pipe (1) with at least one inner pipe (2), a corrugated outer jacket of the line pipe is first produced by means of an extruder (27) and a corrugator (28) and the inner pipe arranged in a foil tube together with a foam-forming starting material is guided into the corrugator, in which the outer jacket of the line pipe which has been corrugated before is filled with the heat-insulating foam. The device (10) provided for carrying out the method has a protective pipe (26) by means of which the inner pipe surrounded by the foil tube can be guided separately from the extrusion and corrugation of the outer jacket into the corrugator.

The invention relates to a cooling nozzle which has a product channel of annular cross-section the circumference of which is closed with the exception of at least one recess. Said recess has the effect that compound exiting the product channel spreads uniformly on a substrate if the compound is sufficiently solid after cooling during passage through the cooling nozzle so that it does not deliquesce on a flat substrate.

A device for producing plastic pipes may include an extruder with a die head and a corrugator, into which a molten plastic tube is introduced by means of the die head to mold the plastic pipe, wherein the corrugator has a molding section, in which molding jaws are guided in pairs in the production direction. In an inlet section of the corrugator, the molding jaws are brought together to form molding jaw pairs towards the start of the molding section, and in an outlet section of the corrugator, the molding jaw pairs are moved apart from each other from the end of the molding section. The guiding apparatus has a guide and/or temperature-control element apparatus having a temperature-control medium channel apparatus through which temperature-control medium can flow, and a guide and/or temperature-control surface apparatus, which faces the outer side of the molding jaws passing through, transferring heat.

A method of manufacturing a polymer film includes melting a resin, extruding the melted resin through a die to produce a polymer film, shaping the polymer film, cooling the polymer film, capturing an image of a test pattern through the polymer film, calculating a modulation transfer function value from the image, and adjusting a process parameter of the melting, the extruding, the shaping, or the cooling based on the calculated modulation transfer function value.

A method of manufacturing a polymer film includes melting a resin, extruding the melted resin through a die to produce a polymer film, shaping the polymer film, cooling the polymer film, capturing an image of a test pattern through the polymer film, calculating a modulation transfer function value from the image, and adjusting a process parameter of the melting, the extruding, the shaping, or the cooling based on the calculated modulation transfer function value.