This concerns a screw pump for the extrusion of plastic materials, which is extremely compact and so it can be inserted in-line in a plastic material filtration system, encapsulating within it a duct parallel to the axis of the screw.

This concerns a screw pump for the extrusion of plastic materials, which is extremely compact and so it can be inserted in-line in a plastic material filtration system, encapsulating within it a duct parallel to the axis of the screw.

Various measures increase 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.

Various measures increase 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 three-dimensional (3D) printing system and method for printing with the 3D system. The 3D system includes a pneumatic dispense gun for mixing a thermoset resin and catalyst and dispensing a catalyzed resin to a rotary dispense valve for application of the catalyzed resin to a substrate on a movable table. The dispense gun contains a catalyst injection unit and a mixer for mixing the catalyst with the thermoset resin. The mixer is downstream of the catalyst injection unit and the catalyst injection unit includes a catalyst injector and a distribution ring surrounding the catalyst injector. One or more first pumps are provided for pumping the thermoset resin from a storage container to the pneumatic dispense gun. A second pump is provided for pumping the catalyst from a storage container to the dispense gun.

Exemplary embodiments are disclosed of systems and methods for dispensing thermal management and/or EMI mitigation materials. The system and methods include online remixing prior to dispensing the thermal management and/or EMI mitigation materials. In an exemplary embodiment, a system includes an online remixer configured to be operable for receiving a supply of the thermal management and/or EMI mitigation material including one or more functional fillers within the matrix, and remixing the one or more functional fillers including filler settlement, if any, within the matrix prior to dispensement of the thermal management and/or EMI mitigation. The remixing may reduce the filler settlement, if any, within the matrix and thereby allow for improved viscosity and flow rate of the thermal management and/or EMI mitigation material.

Exemplary embodiments are disclosed of systems and methods for dispensing thermal management and/or EMI mitigation materials. The system and methods include online remixing prior to dispensing the thermal management and/or EMI mitigation materials. In an exemplary embodiment, a system includes an online remixer configured to be operable for receiving a supply of the thermal management and/or EMI mitigation material including one or more functional fillers within the matrix, and remixing the one or more functional fillers including filler settlement, if any, within the matrix prior to dispensement of the thermal management and/or EMI mitigation. The remixing may reduce the filler settlement, if any, within the matrix and thereby allow for improved viscosity and flow rate of the thermal management and/or EMI mitigation material.

The invention relates to the field of 3D printing, particularly to the extrusion method (Material Extrusion), i.e., the layer-by-layer deposition of a molten building material through an extruder head (an extruder). The present device allows for using a wide range of materials when printing, such as liquids, pastes, and melts (including metals), as well as for using pre-treated secondary raw materials. An extruder has, within a single housing, a loading chamber and a removable working chamber having a three-sided rotor (piston) moving therein and an eccentric drive shaft, as well as an extruder tip connected to the housing, said tip having a removable nozzle on its end, a built-in heat sensor, and a built-in heating element. At least one heating element and heat sensor are disposed within the housing. The extruder is disposed on a mounting frame having a drive motor, and said frame fastens to a moving platform of a 3D printer.

One aspect of the present disclosure relates to devices for sealing gaps in an extrusion assembly to provide for a consistent extrusion. In one embodiment, a barrel-shaped sealing device with a resilient protruding edge is used to prevent extrusion material from entering gaps between the piston and the inner surface of the barrel. The sealing device includes a fastener to releasably attach the sealing device to the piston. Sealing rings are inserted into a bottom gap formed between the bottom edge of the barrel and the bottom surface of the die.

One aspect of the present disclosure relates to devices for sealing gaps in an extrusion assembly to provide for a consistent extrusion. In one embodiment, a barrel-shaped sealing device with a resilient protruding edge is used to prevent extrusion material from entering gaps between the piston and the inner surface of the barrel. The sealing device includes a fastener to releasably attach the sealing device to the piston. Sealing rings are inserted into a bottom gap formed between the bottom edge of the barrel and the bottom surface of the die.