| 摘要 |
<p>A method and an apparatus of providing, by an ultrasonic welding process, a liquid and gas proof connection by means of an all around extending plastic welded sealing joint e.g. between an inner lid and an outer container sleeve (15) or any other object having an open end, and which apparatus comprises at least one matrix (17> for carrying a container sleeve (1), means for forming and introducing a closing part, e.g. a lid (2), having fold up edge rims in an open end of the container sleeve (1), and means (10) for weld connecting the container sleeve (1) and the lid (2), and in which the weld connection means comprises a solid plunge (6) adapted to be placed inside the lid (2) after the lid has been pressed down into the container sleeve (1), at least two but preferably three or four, co-operating, separate ultrasonic weld tools (10) arranged on the exterior side of the container (1), which weld tools (10) enclose the largest portion of the container periphery, and arranged to concurrently with each other and by a predetermined force press the ultrasonic weld tools (10) against the outer surface of the container using the inner solid plunge (6) as a counter die, and means (7-9) for creating ultra sound of a predetermied frequency and a predetermined force in the weld tools (10) in order to establish heat of welding temperature in the common surface between the plastic layers (4), or the plastic materials, of the container sleeve (1) and the lid (2). <IMAGE></p> |
