RocTool SAS of Le-Bourget-du-Lac, France, known for using electromagnetic induction to process composites, with Visteon Corp. has adapted Cage System technology to the plastics injection molding arena.
Injection molding by induction can be applied to thin or overmolded parts, any type of cosmetic part and materials with strong viscosity, such as elastomers.
Visteon worked with RocTool for three years to adapt the process to injection molding as a way to improve quality and reduce costs.
Traditional injection molding requires high injection speed and a lot of pressure to fill the cold mold, as the plastic starts to solidify during the shot. That can cause molded-in stresses, making it hard to make flat parts.
As an alternative, the RocTool method uses electromagnetic induction to heat the surface of the mold quickly — in five to 10 seconds — so the mold is close to the temperature of the liquid plastic.
Molders can optimize the thickness of the part, cutting weight, the company said.
Alex Guichard, chief executive of RocTool, said the company is developing two tools equipped with the technology to be installed in France by the end of this year. RocTool said it wants to license the Cage System to resin makers and processors.
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