Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

FP5

HITHEX Résumé de rapport

Project ID: G5RD-CT-2000-00218
Financé au titre de: FP5-GROWTH
Pays: United Kingdom

Needling PANOX end caps on PANOX tubes

PANOX end-caps and PANOX tubes were developed and joined together. Initial attempts to needle separately produced parts resulted in a weak joint. After several modifications, a method was develooped where the layers that build up the end caps were directly needled onto the tubes.

Eight to ten cross shaped pieces were cut out of a PANOX felt and laid up on an antistatic foam mandrel (covered with a latex cap) to build up the end-cap. A poly-glycol-ester was used to keep the felt layers closely together. Additionally, a latex cap was pulled over the structure to hold the pieces together. Subsequently the felt pieces were needled directly onto the PANOX tube with a self developed device that pushed a single needle 120 times per minute into the pre-form and moved the needle along the whole end-cap. When the needle had reached the end of the sample, the sample was turned by a motor a little bit. This process was repeated until the whole end-cap was needled.

One advantage of this new method is that the joint between end-cap and tube is much stronger (compared to making end-cap and tube separately and joining both pieces thereafter). A second advantage is that the production time can be significantly reduced. A possible application is the production of PANOX tubes with end-caps.

Contact

Walter BUCHGRABER, (Technical Director)
Tél.: +44-1992-711111
Fax: +44-1992-768393
E-mail