Flexible polyamide: A good alternative to sequential blow moulding

Flexible polyamide: A good alternative to sequential blow moulding

Innovative under-bonnet air guides for Daimler Chrysler manufactured by Solvay Automotive GmbH (Germany)

Significant cost savings can be achieved using hard-soft constructions in plastic instead of the conventional combination of metal and rubber for the manufacture of air feed pipes in automotive construction. Use of Grilon/Grilon ELX in sequential blow moulded pipes has proved particularly suitable for this application. The extrusion blow moulding process can be significantly better controlled than with other, commercially available hard-soft components.

A new, highly flexible Grilon ELX 50 HNZ now offers not only cost-saving potential and processing advantages, in addition it brings a whole range of improved properties.
With the clean air feed shown above, standard bellows can be used due to the low pressure stressing.

However, in order to be able to work without the expensive rubber in high-pressure applications, such as under-bonnet turbo-charger air pipes, EMS-GRIVORY developed and patented a new bellows design and gave it the name MOAX'. With MOAX' very flexible pressure pipes with a very low change in length, not otherwise possible with a standard bellows design, can be manufactured.
This combination of innovative product and a constructive solution will satisfy future requirements for the automotive construction industry.