Method and Device for Thermally Coating Surfaces, Particularly High-Speed Flame Spraying

Simple SummaryContent extracted from patent full text and abstract with AI.

The patent describes a method and device for thermally coating surfaces, especially through high-speed flame spraying. The core innovation is the use of a shielding gas flow with angular momentum that encases and stabilizes the main spray jet, both of which are jointly passed through an expansion nozzle. This arrangement reduces the divergence of the spray jet and provides both stabilization of the coating process and additional cooling of the device and spray stream, resulting in a more precise, efficient, and high-quality coating application.

Use CasesContent extracted from patent full text and abstract with AI.

• Protective coatings for industrial machine parts to reduce wear and corrosion
• Aerospace component coating for improved thermal and environmental resistance
• Automotive parts coating (e.g., pistons, shafts) for durability enhancement
• Biomedical implant coating to improve material compatibility and longevity
• Electronics manufacturing for precise deposition of conductive or protective layers
• Oil and gas equipment surface reinforcement to minimize maintenance and extend operational life

BenefitsContent extracted from patent full text and abstract with AI.

• Improved precision and control over coating thickness and distribution due to reduced spray divergence
• Enhanced adhesion and density of deposited coatings, leading to fewer defects (porosity, oxidation)
• Increased process efficiency by stabilizing the spray jet and reducing material waste
• Device and spray jet cooling allows higher operational performance without overheating risks
• Applicable to a wide range of thermal spraying and coating processes, including both high- and low-speed, and adaptable to different coating materials
• Reduces equipment wear and the risk of overheating, contributing to longer device life and reduced maintenance costs

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a method for the thermal coating and to a device, particularly for carrying out the method, particularly high-temperature flame spraying, of surfaces. A shielding gas flow (15) to which an angular momentum is applied flows around a spray jet (8). The spray jet and the shielding gas flow are further guided through an expansion nozzle (6), which is connected downstream of a nozzle for generating the spray jet, and a swirl generator (5) for generating the shielding gas flow (15) in a flow direction. The shielding gas flow stabilizes the spray jet. A jet divergence of the spray jet is further delimited by the shielding gas flow. Furthermore, the shielding gas flow also has a cooling effect on the device and the spray jet.