摘要:
A mixing head has traces of the reactive mixture of synthetic resin components removed therefrom by insertion into a housing or rinsing flange into which a rinsing liquid, e.g. hot water, is forced via nozzles or orifices trained inwardly of the plane of the mixing head. The mixture of rinsing liquid and removed residue is passed through a bag filter in which the residue is collected and the rinsing liquid is recirculated.
摘要:
Molded articles comprising at least one layer of polyurethane are produced in a batch process by mixing polyurethane-forming components to form a reactive mixture that is flowed through a channel having at least one opening through which a gas is introduced and sprayed on a substrate surface. The device suitable for carrying out this batch process includes a cylindrical mixing chamber, a flow channel through which the reactive mixture flows and is sprayed onto the surface of a substrate where it cures thereon. The flow channel is cleaned by a stream of gas.
摘要:
Plastic residues in mixing apparatuses and molding tools filled from these are removed by a method in which the said residues are vaporized by heating.
摘要:
One aspect of the invention pertains to a device for mixing and dispensing fluids, which generally includes a housing; a mixing chamber having a first inlet for introducing a first fluid into the mixing chamber, a second inlet for introducing a second fluid into the mixing chamber, and an outlet through which fluid may exit the mixing chamber; and a valving rod received within the mixing chamber and movable between an open position, in which the first and second inlets are in fluid communication with the mixing chamber, a cleaning position, in which the valving rod substantially seals closed the first inlet but does not seal closed the second inlet, and a closed position, in which the valving rod substantially seals closed the first and second inlets.
摘要:
A dispenser for dispensing foamable compositions includes a first module comprising a first housing, a fluid flow fitting in the first housing, a shutoff valve in the first housing and in fluid communication with the fluid flow fitting. The dispenser further includes a second module comprising: a second housing, a valving chamber in the second housing for receiving fluid from the shutoff valve and the fluid flow fitting; and an attachment for securing the first and second modules to one another with the valving chamber in fluid communication with the shutoff valve and the fluid flow fitting so that foam precursors can travel from the foam fittings to the valving chamber, and be dispensed from the chamber to form foam.
摘要:
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.
摘要:
A dispenser for mixing foam precursor chemicals and dispensing the foamable mixture includes a first module containing shutoff valves and a second module containing a dispensing valve assembly. The dispensing valve assembly includes a valve body of a self-lubricating material and a valving rod which is reciprocatingly retracted in a valve passage of the valve body to uncover orifices which supply the precursor fluids into the valve passage, from which the mixed chemicals are dispensed. The dispensing valve assembly includes a die spring which urges a washer to compress the valve body along its axis to help prevent cold flow of the valve body away from the valving rod. The valving rod is scraped by inner surfaces of the hole in the washer through which the valving rod is retracted and extended. The die spring is preloaded and retained by a load cylinder which is fixed in the bore in the second housing which contains the dispensing valve.
摘要:
One aspect of the invention pertains to a device for mixing and dispensing fluids, which generally includes a housing; a mixing chamber having a first inlet for introducing a first fluid into the mixing chamber, a second inlet for introducing a second fluid into the mixing chamber, and an outlet through which fluid may exit the mixing chamber; and a valving rod received within the mixing chamber and movable between an open position, in which the first and second inlets are in fluid communication with the mixing chamber, a cleaning position, in which the valving rod substantially seals closed the first inlet but does not seal closed the second inlet, and a closed position, in which the valving rod substantially seals closed the first and second inlets.
摘要:
A device for removing plastics residue from a cleaning piston having an end face and a mixer head outlet pipe of a counter-current injection mixer head, wherein the device comprises a stripping plunger having a stripping edge; a mortar for receiving the stripping plunger, the mortar comprising an outlet opening for disposing the plastics residue from the mortar which is disposed at an angle to an impact face of the mortar; a hydraulic device for bringing the mixer head and the stripping plunger towards each other in the cleaning position, in which the stripping edge of the stripping plunger is aligned with the end face of the cleaning piston, wherein the axis of the cleaning piston is situated between the mortar and the stripping plunger; and a hydraulic device for moving the stripping plunger parallel to the end face of the cleaning piston into the mortar and towards the impact face of the mortar.
摘要:
A cleaning assembly is provided for a foam dispensing apparatus which intermittently supplies a solvent to the discharge port of the dispensing apparatus for removal of accumulations of dispensed foam therefrom. The cleaning assembly is constructed from a body having a wall forming an opening extending therethrough in communication with the discharge port of the dispensing apparatus. At least one passageway is formed in the body for discharging the solvent from a supply thereof onto the face of the dispensing apparatus surrounding the discharge port.