I am not aware of specific machines dedicated solely to producing flap discs. However, it's worth noting that the industrial and manufacturing landscape is continually evolving, and new technologies and machines may have been developed since then.
Flap discs are abrasive tools used for grinding, blending, and finishing metal and other materials. They typically consist of multiple overlapping abrasive flaps adhered to a backing plate. Flap discs can be made using various manufacturing processes and machinery.
In the abrasive manufacturing industry, there are machines used for cutting, shaping, and bonding abrasive materials to create different abrasive products, including flap discs. These machines may be semi-automatic or fully automatic, depending on the level of automation required for the specific production process.
Full-automatic machines, or fully automated production lines, are commonly used in various industries to streamline the manufacturing process, reduce labor costs, and improve efficiency. It is possible that some manufacturers have developed or adopted full-automatic machines or production lines for flap disc production to enhance productivity and consistency.
To get the most up-to-date information about flap disc manufacturing processes and machinery, I recommend checking with abrasive product manufacturers or industry-specific publications and resources that cover recent advancements in abrasive tool production.