BATAVIA, OHIO — Milacron Inc. has developed a new way to blow mold polycarbonate water bottles and, for injection molding, introduced a Wearstar package on its screws and barrels, with a three-year warranty.
Milacron's Service Parts operation developed the Wearstar program, which is available for any make, model or age of injection molding machine.
A superalloy feedscrew, barrel, tip assembly and end cap are designed for high-wear processes, such as 50 percent glass-filled nylon and liquid-crystal polymers, as well as processing temperatures as high as 500° F, the company said.
Milacron points out the package is not recommended or warranted for fluoropolymers, ferrites or powdered metals.
Milacron's Plastics Technologies Group is based in Batavia.
In blow molding, Milacron has applied for a patent on a way to extrusion blow mold PC water bottles with a smooth, thick, calibrated neck interior.
The company said health codes in Far Eastern countries mandate that style of bottle because of the perception that water can stagnate in interior neck grooves.
Until now, bottles with a smooth finish on the interior of the neck have been manufactured using the more-expensive and slower injection blow molding process.
Key to the process is closed-loop control of the parison.
Milacron has developed the extrusion blow process for an undisclosed bottle producer in the region, and has sold five Eclipse E75 machines with 5-pound accumulator heads to the company.
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