A device and a method for producing reaction plastics, including a first metering device with a first metering unit and a second metering unit, each of which is suitable for receiving and dispensing a first mixing component in a metered manner, a second metering device which is suitable for receiving and dispensing a second mixing component in a metered manner, and a mixing device which is suitable for receiving and mixing the first mixing component dispensed by the first metering unit and/or the second metering unit of the first metering device and the second mixing component dispensed by the second metering device. For this purpose the first metering unit and the second metering unit are connected to the mixing device such that prior to beginning the mixing process, the first mixing component can be brought to an operating state required for the mixing process, in particular an operating pressure, by guiding the first mixing component from the first metering unit to the second metering unit via the mixing device.

A spray gun for a plural component system is provided. The spray gun includes a first component delivery line and a second component delivery line. The spray gun also includes a nozzle, configured to receive and mix a first component received from the first component delivery line with a second component received from the second component delivery line. The spray gun also includes an air purge system configured to, when the spray gun is in a non-actuated position, purge the nozzle of the first and second components and, when the spray gun is in an actuated position, aid in atomization of the mixture of the first and second components.

A mixing method provided by the invention comprises steps of melting a solid-state polymer raw material into a flowable molten raw material fluid to flow into a mixing space at a first volume flow rate, when the raw material fluid entering the mixing space, introducing a foaming agent in a fluid form into the mixing space simultaneously or at a different time, mixing the foaming agent with the molten raw material fluid into a mixture in the mixing space, circulating the mixture in the mixing space at a second volume flow rate, and causing the second volume flow rate greater than the first volume flow rate.

A device and a method for producing reaction plastics, including a first metering device with a first metering unit and a second metering unit, each of which is suitable for receiving and dispensing a first mixing component in a metered manner, a second metering device which is suitable for receiving and dispensing a second mixing component in a metered manner, and a mixing device which is suitable for receiving and mixing the first mixing component dispensed by the first metering unit and/or the second metering unit of the first metering device and the second mixing component dispensed by the second metering device. For this purpose the first metering unit and the second metering unit are connected to the mixing device such that prior to beginning the mixing process, the first mixing component can be brought to an operating state required for the mixing process, in particular an operating pressure, by guiding the first mixing component from the first metering unit to the second metering unit via the mixing device.

Apparatuses for producing and dispensing a reaction mixture include a mixing head for mixing the reaction components that are fed via two supply lines. The apparatuses also include a decompression system to relieve pressure from the supply lines to avoid the reaction components seeping into the mixing head. The decompression system includes two pressure vessels each with two sides, separated by a membrane. One of these sides forms an expansion chamber for the reaction component, while the other side is connected to a pneumatic system. With this pneumatic system, the expansion chamber can be pressurized before the production of the reaction mixture. After the production of the reaction mixture, the pressure can be relieved.

The invention concerns an apparatus (1) for the dispersion of an expansion gas even in supercritical conditions, e.g. carbon dioxide, in a reactive resin, of the kind in which a reaction chamber having an input (27) for gas and an input (37) for resin is provided. Advantageously, the chamber is a dispersion and containment chamber made into a casing (2) of predetermined high resistance susceptible to sustain high pressure and is divided into two sections (6,7) by a head (14) of a dispersion and mixing cylinder-piston group (4) in fluid communication between themselves by means of at least one pouring passage (31, 36, 32, 39) provided with a static mixer (38), motor means (3) being provided for piston (34) control of said mixing cylinder-piston group (4). The invention also concerns a process for the formation of a polyurethane foam starting with the dispersion of carbon dioxide, even supercritical, in a reactive resin in which at least one initial dispersion and mixing controlled phase of the two components is provided in a dispersion and containment chamber under pressure divided into two sections (6,7) by a head (14) of a cylinder-piston mixing group (4) in fluid communication between themselves by means of at least one pouring passage (31, 36, 32, 39) provided with a static mixer (38) and in which adduction, dispersion and mixing occurs under high pressure (at least greater than 75 bar).

A foam dispenser having a metal housing has a spool valve socket therein. A metal handle extends from the housing. A spool valve is disposable within the spool valve socket. A trigger couplable to the spool valve enables the spool valve to be rotated between open and closed orientations within the housing. The spool valve has internal channels for selectively passing liquids through the spool valve in the open orientation and not in the closed orientation. The spool valve also has a channel for selectively passing a gas through the spool valve in both the open and closed orientations.

A device (1) and method for the production of plastic parts (2), having a first plastic feed device (3a) for feeding a first liquid plastic starting component (K1); a second plastic feed device (3b) for feeding a second liquid plastic starting component (K2); a mixing device (5) with a mixing chamber (6), wherein in the mixing chamber the liquid plastic starting components that can be fed by the plastic feed devices can be mixed to form a plastic mixture (KG); a discharge nozzle (7) for discharging the plastic mixture; and a cooling device (8) for the mixing device, wherein a drying device (9) surrounding the mixing device at least in regions is provided, wherein the drying device has a separating device (10), a drying chamber (T) formed between the separating device and the mixing device, and a desiccant feeding device (11) opening into the drying chamber are disclosed.

A device includes a source for at least one liquid plastic component, and a metering device. The source is configured to intermittently supply the at least one liquid plastic component for the metering device. A buffer device with a variable buffer volume is between the source and the metering device, and the buffer device is connected to the source via an inlet opening and to the metering device via an outlet opening.

The invention relates to a device (1) and method for the production of plastic parts (2), having a first plastic feed device (3a) for feeding a first liquid plastic starting component (K1); a second plastic feed device (3b) for feeding a second liquid plastic starting component (K2); a mixing device (5) with a mixing chamber (6), wherein in the mixing chamber the liquid plastic starting components that can be fed by the plastic feed devices can be mixed to form a plastic mixture (KG); a discharge nozzle (7) for discharging the plastic mixture; and a cooling device (8) for the mixing device, wherein a drying device (9) surrounding the mixing device at least in regions is provided, wherein the drying device has a separating device (10), a drying chamber (T) formed between the separating device and the mixing device, and a desiccant feeding device (11) opening into the drying chamber.