Method of making a sanitary basin

A method of originally making a sanitary basin, comprising the steps of:

• (a) forming a basin body having an upwardly open cavity from a foam synthetic resin;
• (b) heating a deep-drawable thermally softenable plate-shaped blank of a thermoplastic synthetic resin sanitary-basin surfacing material to a deep drawing temperature;
• (c) providing said basin body as a shaping die with a bottom and side walls in a deep drawing press;
• (d) juxtaposing the heated deep-drawable thermally softenable plate-shaped blank on a tensioning frame juxtaposed with the die and pressing the blank against said bottom and side walls with a deep drawing ram to deep draw the blank complementary with said die and line said body with said surfacing material;
• and
• (e) holding said ram against the deep drawn blank and said blank against said body with a pressure and for a duration sufficient to bond said deep drawn blank to said body directly in an intermelting of said body and said deep drawn blank, the temperature to which said blank is heated in step (b) being at least equal to a temperature required for the bonding of said deep drawn blank to said body in step (e).