Method for producing a basin integrated in a receiving plane, receiving plane for carrying out the method and monobloc assembly obtained by the method

A method for producing a basin (1) integrated in a work surface, called the receiving plane (2), comprising an upper surface (2a) and a lower surface (2b), according to which method the receiving plane is pierced right through and an opening (3) adapted to receive the basin is formed, wherein:

• an injection mould (10) for thermoplastic synthetic material is used, comprising:
• a first shell of generally concave shape, called the lower shell (12), adapted to bear on the lower surface (2b) of the receiving plane and
• at least one shell of generally convex shape, called the upper shell(s) (13, 13a, 13b), adapted to bear on the upper surface (2a) of the receiving plane and form with the lower shell a moulding cavity, called the impression (16), with the shape of the basin to be obtained,
• the receiving plane (2) is installed in the mould so as to clamp the periphery of the opening (3) of the receiving plane between the lower shell and an upper shell in such a way that at least part of the edge (3a) of the opening constitutes a continuous peripheral wall of the mould connecting the lower shell to the upper shell,
• a thermoplastic synthetic material is injected into the impression (16) so as to form a basin (1) moulded onto the receiving plane (2).