WERKWIJZE EN INRICHTING VOOR HET DOOR STOMP-SPIEGEL-LASSEN MET ELKAAR VERBINDEN VAN EEN DOOR EXTRUSIE VERKREGEN VATROMP MET VATDEKSEL.

摘要

Process and device for connecting together an extruded plastic cylindrical vessel body (2) with a plastic lid (1) by means of butt-welding of edges (4,5) heated with a heated plate (12) the said lid being deformed elastically to a larger diameter prior to butt-welding, the device for expanding the lid (1) having a conical expansion element (9), a supporting ring (10) and locking elements (11) holding the expanded lid at a diameter corresponding to the edge diameter of the body (2).