Blow molding is a manufacturing process which forms hollow plastic parts, consisting of three main types: extrusion, injection, and injection stretch. The blow molding process begins by melting down the plastic and forming it into a parison, a tube-like piece of plastic with a hole in one end. The parison is clamped into a mold and compressed air is blown into it until the plastic fills the mold. Once the plastic has cooled and hardened, the mold opens up and the part is ejected.
Temperature control units, like Delta T Systems,’ are used in blow molding applications to cool process molds. Molds must be cooled quickly to maintain a high quality product and to increase part production output. Some blow molding applications will require a central chilling system which is used to cool the process water. To avoid condensation, the piping of a custom temperature control unit can be insulated with elastomeric closed-cell foam like the one shown below.