Engel North America's Variomelt technology heats and then cools injection mold-cavity surfaces during each cycle, before the mold opens. The process lets molders know when the cavities are hot enough to deliver a high-quality part surface with no weld lines, or when the cavities are cool enough to speed cycle times.
Engel's dynamic temperature-control systems keep mold-wall temperature above a resin's crystalline temperature while cavities are being filled. Then Variomelt quickly cools the mold to solidify a part, significantly reducing the chance of molded-in stresses and defects, Engel said.
The injection press maker added that Variomelt also fosters accurate nanostructures, from microscopic, pyramid-like shapes on light-guide panels to nanosized elements in electronic parts and microfluidic devices.
York, Pa.-based Engel said the technology also makes it easier to fill thin-wall parts and cuts cycle times for molding lenses and other thick-wall parts. For example, Variomelt cuts cycle time 30 percent when molding a 30-millimeter-thick polycarbonate lens.
Tel. 717-764-6818, fax 717-764-0314, e-mail [email protected].