Unique Mold Cooling Cuts Cycles, Raises Output

New aluminum mold blocks from ThermaForm LLC, Troy, Mich., incorporate conformal cooling technology to reduce cycle times for blow molded bottles.

New aluminum mold blocks from ThermaForm LLC, Troy, Mich., incorporate conformal cooling technology to reduce cycle times for blow molded bottles. ThermaBlocks have been used for a year at Smith Dairy, Orrville, Ohio, to make gallon HDPE milk bottles. At Smith, cycle time was reduced and capacity climbed 14%/cavity/hr, resulting in production of an extra 600,000 bottles/yr. Patented technology puts the water closer to the mold surface and increases the ratio of water to mold surface, according to Michael Mast, general manager. Unlike other multi-piece conformal cooling systems, ThermaBlocks are seamless pre-finished blocks that reportedly reduce mold temperature by 10%, resulting in less bottle-neck ovality, reduced warpage, and less scrap.
 

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Materials: Cycle Time: Science vs. Rules of Thumb—Part 2

Understanding cooling—how a given material develops modulus as it solidifies—requires access to data that provides some insight into the relationship between modulus and temperature. Dynamic mechanical analysis is a helpful tool.