Method and apparatus for making composite bathtubs

摘要

The inner shell (1) is deep drawn and has its edge located on a tensioning tool base plate. A preformed steel shell (2) is arranged so that an intermediate space removes between it and the plastic inner shell. The two shells are tensioned at their edges using a frame, and a sealed ring space is located next to the inner shell collar. Filler is injected into the intermediate space via the bath outlet opening (2a).