Abstract: A process and means for joining polyamide parts by friction welding, whereby the particles, called "turnings" formed and expelled from the welded joint are captured. In the production of many containers composed of relatively hard polyamides, having melting points above 250 degrees Celsius, it is necessary to prevent the turnings from falling into the inside of the container. This is particularly true when the turnings cannot be rinsed or sucked from the interior with relative ease or minimal cost, such as when walls, ribs or chambers are present inside the container. In the past, recesses have been provided near the joint to collect the turnings, however, such recesses did not prevent all turnings from being thrown into the interior of the container.
January 14, 1988
Date of Patent:
April 24, 1990
Verwaltungsgesellschafft Geiger Plastic GmbH & Co. KG