technology | Foam moulding
Right: Schröder of Germany uses Cellmould and two-com- ponent techniques to produce automotive components weighing 10% less than compact parts
showed stiffness improvements of up to 5%, compared to a compact moulded equivalent. Strength-to-weight ratios showed a gain of up to 10% and stiffness-to- weight ratios a gain of up to 19%, depending on the degree of foaming. The Streamoulding process has been under
development for more than five years but the company only started to market it commercially in February of this year. “The technology is undergoing trials at various different stages both at our factory and at potential
AMI’s Guide to:
customers’ premises in Europe. Applications vary from thick and thin wall packaging products to composite materials for the automotive sector,” says Heaton. Heaton says the process has been proven to work with PP, PS, PVC, PA and a range of TPEs. It has been trialled successfully in multi-cavity tooling with hot runner systems, while a special nitrided nozzle has been manufactured for one potential customer for processing PA reinforced with 35% glass fibres. No special post-moulded conditioning is required, he says. The process is also highly controllable, says Heaton. In trials on a prototype mould for German thin wall packaging producer Spies Kunststoffe, the Streamould- ing technology has eased filling of a prototype container with almost no visible evidence of a foamed structure in the 0.7 mm wall.
Click on the links for more information: ❙
www.mecaplast.com ❙
www.trexel.com ❙
www.coralfoam.com ❙
www.wittmann-group.com ❙
www.rndfactory.co.uk
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