Injection Molding Issues BleedingBleeding can lead to an increase in scrap and rejects, plus unnecessary downtime. Bleeding solutions → rustNothing can hinder your mold and process faster than rust and corrosion. Rust Solutions → Gas buildupGas buildup can lead to burning, splay, and other defects on molded parts. buildup solutions → StickingEliminate sticking to decrease cycle time and maintenance. sticking solutions → Try a Free Sample