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10th October 2019, Le Cheylard

Chomarat creates fabrics for super-light car’s underbody part

The new leaf springs made of composites are 60% lighter than their pendants made of steel. © Chomarat

The new leaf springs made of composites are 60% lighter than their pendants made of steel. © Chomarat

Chomarat Group’s composite reinforcements will be featured at the KraussMaffei stand during the next K Messe in Düsseldorf, from 16-23 October. Chomarat has created a glass reinforcement adapted to the mass production of automotive parts, helping to lighten leaf springs by 60% compared to metal.

The new leaf springs made of composites are 60% lighter than their pendants made of steel thanks to KraussMaffei process and the involvement of a network of partners, including Chomarat with G-Ply glass reinforcement. Their strength can be deliberately increased in sections where it is required and the corrosion resistance offers further added value, the company reports.

“We created the fabrics, when Engenuity developed the component, Huntsman supplied the matrix system made of epoxy resin, Johns Manville supplied the glass fibres, Schmidt & Heinzmann manufactured the preforms, Alpex designed the RTM mold and Hufschmied (Bobingen, Germany) took charge of post-mould processing of the component by milling. KraussMaffei has taken over the project management for Hengrui and coordinates the project with the partners,” explained Francisco De Oliveira, at Chomarat.

The stitched UD glass developed for the project is adapted to the HP-RTM process (high pressure resin transfer moulding) used to produce the leaf spring with high weight content of glass fibre. This design of the fabric is said to ofeer an improved permeability that allows the resin flow through the multiple plies of the preforms.

“This new reinforcement includes a binder to allow preform stability and automatization onto the cutting and stacking processes. Chomarat strengthens its developments for the automotive industry by offering a new generation of reinforcements, usable in short cycle time process,” added Francisco De Oliveira.

www.chomarat.com

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