This issue of Best Practices goes to South Elgin, Ill., and custom molder Hoffer Plastics Co. — and Hoffer's magnetic attraction to Bunting Magnetics Corp. The message: A relatively small investment can head-off major production problems and costly downtime.
Several years ago, Hoffer installed Bunting FF drawer magnets on the feed throats of the company's machines. The magnets remove metal contamination from plastic material before the resin enters the press, where the metal can cause major damage to the equipment and get into the molded part.
It can be expensive. "At least $1,500 to $5,000 of part expenses will be incurred if metal gets into the hot runner or mold," said Charlotte Canning, Hoffer's vice president of brand and culture.