Masking cylinder bore extremities from internal thermal spraying

摘要

The method involves supporting one or more inflatable mask members adjacent an end of the bore wall. Then pressurizing the inflatable mask member to expand and annularly engage an end of the bore, the mask being constituted of an inflatable and collapsible air tight bag of heat resistant (fibreglass) cloth coated on opposite sides with a sacrificial heat resistant non-stick coating (silicone). The inflatable characteristic of the mask member allows it to conform to the periphery of the cylinder bore extremities, and allows it to be easily installed in or through the component in its deflated condition.