PURGING: Device Makes Purging Safer, Simpler

New purge guard is reusable and recyclable.

A new device designed to capture molten plastic purges and create a safer environment for personnel and equipment in plastics processing operations was introduced at NPE2015 by the Dyna-Purge div. of Shuman Plastics. Depew, N.Y. Lava-Shield is the result of a two-year development project and hundreds of field trials. This protective purge guard is said to be easy to use in injection molding, extrusion, compounding, and blow molding. Field studies found that most purges are shot onto cardboard or, even worse, grabbed by hand with a hot glove or rag. Such operations always result in waste because the purge gets contaminated and has to be disposed of—aside from the potential injury to personnel.

Designed with a unique combination of specialty papers, Lava-Shield absorbs and then dissipates heat quickly and will not hold or transfer heat, the company says. When the purge cools, the special non-stick surface releases it, free from contamination, so the purge can be recycled or sold. Lava-Shield can be folded, cut, and shaped to specific needs. This purge guard is reusable up to five times, is made with up to 30% recycled content, and can be recycled along with other waste paper.

One early adopter is Mahle Filter Systems North America, a global supplier to automotive OEM and aftermarket applications. Greg Johnson, injection mold/production supervisor at Mahle’s Murfreesboro, Tenn., plant (photo) was looking for a safer way to handle hot PP and nylon purges from 57 injection machines of 220 to 1000 tons. “Lava-Shield has many benefits for us, including the fact that the guards are reusable and recyclable,” Johnson says. “Most importantly, they are safe and customizable for our specific needs.”

Lava-Shield is available in a 150-count “brick” or 75-count “half-brick.” A free sample is available for qualified applications.