Device for the thermal spray application of fusible materials

US4711627A · kind A · utility

Assignee

• Castolin, S.A. · CH

Inventors

• Manfred Oeschsle · Bad Homburg vor der Höhe, DE
• Uwe Szieslo · Idstein, DE
• Karl P. Streb · Remscheid, DE
• Wolfgang Simm · Lausanne, CH

Key dates

• Filing date: Apr 24, 1985
• Grant date: Dec 8, 1987
• Expiry date: Apr 24, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05H1/36
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A spray gun comprises a nozzle defining an elongated, axially extending spray channel, a coaxial inlet leading thereto and having a flow-accelerating contour, and a coaxial combustion chamber leading to the inlet, the combustion chamber having a diameter larger than that of the spray channel. A nozzle head is displaceably mounted in the combustion chamber and is axially adjustable with respect to the inlet, the nozzle head feeding the fusible material into the combustion chamber and carrying a burner nozzle and respective conduits feeding a combustion gas and a spray channel flushing gas into the combustion chamber. An ignition electrode projects into the combustion chamber and is arranged for adjustment with respect to the burner nozzle in a direction transverse to the axis, and a control circuit comprises a switching element for supplying electric current to the ignition electrode whereby a spark is formed between the ignition electrode and the burner nozzle for igniting the combustion gas in the combustion chamber, and respective controllers for feeding the combustion gas and the flushing gas through the respective conduits, the control circuit sequentially operating the control…