A screw-driven extrusion system includes a novel screw-drive extruder. The extruder includes a motor-driven screw. The screw moves solid pellets from a feed hopper into a section that is actively heated. The solid pellets fully liquefy as they pass through the heated section. A control system controls screw, heating, and optionally cooling, operations to selectively control flow of liquefied material from the extruder's tip. The dynamically-controlled can continuously adjust its feed speed and temperature to keep up with continuously changing demands of a larger control system involved in monitoring and running a corresponding 3-D printer in an additive manufacturing process. In contrast to wirefeed extrusion systems that rely on the rigidity of the material in wire-formed feedstock, this screw-driven extrusion system is well-suited to use of less-rigid thermoplastic elastomers for the manufacture of objects for use in soft robotics, medical and mold-making applications.

The invention relates to the production of PSA in a planetary gear extruder. During filling and after passing a passage on a dispersing ring using a lateral arm extruder, the products are degassed.

A method for producing thermally crosslinkable polymers in a planetary roller extruder is presented. The planetary roller extruder has a filling part and a compounding part made of a roller cylinder region that comprises at least two, preferably at least three coupled roller cylinders, planetary spindles of which are driven by a common central spindle. The polymers are supplied in a plasticized state. The filling part is supplied with a vacuum. The flow temperatures of the central spindle and the at least two roller cylinders under a vacuum are set such that the polymers to be degassed remain in the plasticized state. One or more liquids, such as thermal crosslinkers, crosslinking accelerators, dye solutions, or dye dispersions, are metered to the plasticized polymers downstream of the vacuum degassing, preferably in a continuous manner. Finally, the resulting mixture is directly supplied to a coating assembly.

The disclosure relates to various measures for increasing the cooling effect on a planetary roller extruder section/module. Those measures include a choke being arranged at an outlet of the planetary roller extruder section or module, a distance between centerlines of adjacent planetary spindles being at least equal to an outer diameter of the planetary spindles, providing a pressurized melt supply, having a cooling section composed of several sections/modules, providing at least one section/module in which a flow, during melt supply is converse to the conveying direction of the extruder, and providing cooling tubes arranged within the central spindle.

The disclosure relates to various measures for increasing the cooling effect on a planetary roller extruder section/module. Those measures include a choke being arranged at an outlet of the planetary roller extruder section or module, a distance between centerlines of adjacent planetary spindles being at least equal to an outer diameter of the planetary spindles, providing a pressurized melt supply, having a cooling section composed of several sections/modules, providing at least one section/module in which a flow, during melt supply is converse to the conveying direction of the extruder, and providing cooling tubes arranged within the central spindle.

A wax melt blank is produced with an extrusion process and intended to later be cut to length into individual wax melts. The wax melt blank includes at least about fifty percent by weight of wax, a fragrance, and up to about fifty percent by weight of a filler. The wax, the fragrance, and the filler are homogeneously dispersed within the wax melt blank.

A wax melt blank is produced with an extrusion process and intended to later be cut to length into individual wax melts. The wax melt blank includes at least about fifty percent by weight of wax, a fragrance, and up to about fifty percent by weight of a filler. The wax, the fragrance, and the filler are homogeneously dispersed within the wax melt blank.

A method for producing low density polyester foam utilizing low I.V. polyester feedstock includes providing a low intrinsic viscosity raw material. The low intrinsic viscosity raw material includes between 25% to 100% of a post consumer polyester and has an intrinsic viscosity of less than 0.8 dl/g. The intrinsic viscosity of the low intrinsic viscosity raw material is increased via a de-condensation reaction configured to support foaming. The intrinsic viscosity of the low intrinsic viscosity raw material is increased to 1.1 dl/g or greater. A starting formulation is created including the low intrinsic viscosity raw material with the increased intrinsic viscosity. The starting formulation is foamed to create the polyester foam. Wherein, the polyester foam produced has a specific gravity of less than 0.65 g/cc.

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 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.