What is POM?

POM, chemically known as polyacetal copolymer, is a highly crystalline, thermoplastic engineering plastic. Our company frequently utilizes POM resin in various gear-related products and has experience molding POM resins containing additives such as carbon powder and calcium carbonate powder.
The standard molding conditions for POM include a resin temperature of 190–210°C, a mold temperature of 60–80°C, and pre-drying at 80–90°C for 3 to 4 hours.

If POM remains stagnant, it generates formaldehyde gas, which has a very strong pungent odor. To ensure safety, our company avoids allowing formaldehyde gas to stagnate for more than 10 minutes. When stopping the molding process, we purge the system and lower the cylinder temperature before shutting down. As a company standards , we either purge or reduce the cylinder temperature before stopping operations. Additionally, for production efficiency, gas vents are always installed at the final filling positions, and regular maintenance is performed, similar to other general resins. For products with significant wall thickness variations or those requiring complex slide mechanisms, CAE analysis is conducted to determine the optimal gate and gas vent positions before proceeding with mold production.