Abstract: The disclosed apparatus includes a detonation chamber constructed in the form of a barrel, a spark plug mounted in the barrel and powder feeding and gaseous mixture delivering systems communicating with the detonation chamber. The powder feeding system include a batchmeter communicating with the source of carrier gas by means of a gas conduit with a control member of the carrier gas feed controller for controlling the quantity of carrier gas delivered to the batchmeter within a unit of time mounted thereon. The apparatus also includes a control system having a powder detector for detecting powder in the detonation products, electrically connected with a control unit. The control unit effects switching on of the mechanisms and the systems in a predetermined succession and switching on of the actuating mechanism of the carrier gas feed controller, depending on the detector signal indicative of the powder presense in the detonation products.

Abstract: A coating is applied to a workpiece by ejecting a powdered material towards the workpiece using the energy of explosion in a recurrent cyclical operation. To produce an explosion, introduced into a combustion chamber of a detonation gun are a powdered coating material suspended in the stream of an inert gas and a gaseous explosive mixture formed by mixing a combustible gas and an oxidizing gas with or without an addition of an inert gas. During the coating process the explosive mixture is formed continuously, and cyclically filling the combustion chamber by portions of the explosive mixture is accomplished by feeding the inert gas to the pipe connecting the mixing chamber to the combustion chamber, which enables regular termination of the stream of explosive mixture and prevents the flame from spreading to the mixing chamber.