A metering and application system for a moisture-curing polymer material includes a reservoir for the polymer material and a first pump and a second pump, wherein the polymer material is conveyable by the first pump from the reservoir to the second pump. In addition, a gas metering device with a defined pressure ratio is provided to bring a gas to a defined pressure, wherein the gas metering device is connected to the input of the second pump on its outlet side. In addition, a mixer for mixing the polymer material and the gas and a valve arranged downstream of the mixer for metering and a nozzle for applying the polymer material/gas mixture are provided.

An apparatus and process for the delivery of material to rolls of a laminator is disclosed.

A gas mixing apparatus includes: a discharge port of gas provided near conduit space through which the high-viscosity material can flow; a piston pump including a cylinder that can communicate with the conduit space through the discharge port, a piston arranged inside the cylinder, and a drive device for moving the piston between a top dead center and a bottom dead center inside the cylinder; a discharge valve that opens and closes the discharge port; and a suction valve that opens and closes a suction port of the gas into a cylinder space, in which the cylinder forms the cylinder space having a predetermined volume when the piston is located at the top dead center, and in which a tip of the piston approaches the discharge port when the piston is moved toward the bottom dead center.

A device adapted to deliver an insulation enhancing polyurethane foam within profiles used in doors, windows and related applications comprising an insulating material supply member (1) extending into a polyurethane forming and discharge member (2) adapted to enter and move linearly along a chamber (25, 35) of a thermally insulated sash or frame profile assembly and deliver therein a polyurethane foam that absolutely abuts onto the walls of the chamber without exerting undesirable stresses thereupon. The insulating material supply member (1) comprises independent pipes (8, 9) delivering a polyol constituent (A) and an isocyanate constituent (B) that are mixed together with a supply of air within a mixing compartment (4) of the polyurethane forming and discharge member (2) to produce the desired insulating material. The polyurethane supplying assembly starts injection at one end of the profile bar having an industrial standard length and moves rearwards to fill the chamber with the polyurethane insulating material.

Dispensing system for dispensing a mixture of a first component and a second component, the dispensing system comprising: (i) a dispensing gun comprising an inlet body with a first passage for feeding in the first component under pressure and a second passage for feeding in the second component under pressure, the first and second passages respectively comprising a closable first outlet and a closable second outlet, which may be operable by means of a handle or trigger of the dispensing gun; (ii) a static mixing nozzle, detachably connectable to the outlets of the body and provided for mixing and dispensing the components, the static mixing nozzle comprising a first section containing a first chamber and a second chamber for conducting the first and second component respectively and a second section, subsequent to the first section (in forwards flow direction), containing a mixing chamber with static mixing elements which promote mixing the first and second components and conducting the mixture to a nozzle tip serving as an outlet for the mixture. According to the invention, at least one of the first and second chambers of the static mixing nozzle contains a series of static backflow prevention elements, arranged for hindering backflow of the respective component within the respective chamber.

A mixing device (10) containing a housing (20) that defines a mixing chamber (30), an A-component feed channel entrance opening (40), a B-component feed channel entrance opening (50), and air feed channel entrance opening (60), and an exit opening (70) where the feed channel entrance openings and exit opening provide fluid communication into and/or out of the mixing chamber, and a static mixing element (80) housed within the mixing chamber between the three entrance feed channels and the exit opening, wherein the air feed channel entrance opening having a cross sectional area that is 0.7 square mm or greater and 7.7 square mm or less.

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 is started. After the production of the reaction mixture, the pressure can be relieved.

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 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 foam dispensing apparatus is capable of dispensing a mixture of a resin component and an isocyanate component. The foam dispensing apparatus includes a resin line and an isocyanate line connected to a manifold. A nozzle is connected to the manifold and the mixture is dispensed through the nozzle. The manifold defines a resin duct in communication with the resin line and the nozzle and an isocyanate duct in communication with the isocyanate line and the nozzle. At least one valve is connected to the resin and isocyanate lines and is moveable between an open position allowing flow through the resin and isocyanate lines and a closed position preventing flow through the resin and isocyanate lines. The valve is disposed exterior to the manifold and the flow is unregulated in the manifold for reducing maintenance of the manifold.