Post-welding cooldown, which of the following is recommended for the mold interior?

• A. Apply a release agent to the interior.
• B. Clean the inside of the mold with a soft bristle brush or soft cotton cloth.
• C. Soak the mold in water to remove salts.
• D. Leave the interior untouched to save time.

Answer: (D)

After welding, the mold interior should be kept as is to protect the surface and avoid introducing contaminants. Any action that adds a coating, fibers, or moisture can alter the surface finish or leave residues that affect the next casting. A release agent would leave a film that might transfer to the part and require cleaning; cleaning with a brush or cloth could shed fibers or particles; soaking in water risks corrosion or salt deposits and needs drying before reuse. Leaving the interior untouched minimizes handling, preserves the mold’s current state, and saves time until the next scheduled maintenance or cycle.