Hollow piece e.g. intake manifold, manufacturing method for internal combustion engine of vehicle, involves forming one of parts on other part by thermoplastic material molding, where latter part comprises rib or edge covered by material

摘要

The method involves forming a part (2) by thermoplastic material molding, where the part includes a rib or an edge (5) projecting at the level of an edge (3) or portion of the assembling edge of the part. A part (2`) is formed on the part (2) by another thermoplastic material molding with over mould with partial of an edge or the portion of assembling edge of the part (2) by the mass of the latter material forming an edge (3`) or a portion of an assembling edge of the part (2`) or an extension (6) of the edge (3), where the rib or edge is entirely covered by the latter thermoplastic material.