Manufactured articles consisting of the coupling of two polyamide-based parts, one of which fiber-reinforced, and a process for the production therof

A process for the production of a manufactured article consisting of the coupling of at least two polyamide-based parts, one of which made of a polyamide matrix optionally loaded with a filler dispersed in the matrix, and the other made of a polyamide matrix reinforced with fibres in their turn made of polyamide, comprising the steps of:

• a) arranging at least one part of a fibre-reinforced composite material, comprising fibres of a polyamide A in a matrix of a polyamide B, or fibres and a matrix of the same polyamide in two different crystalline forms A and B, or fibres (12) and a matrix of the same polyamide in two forms A and B with different molecular weights, wherein the polyamide A of the fibres has a higher melting point than the polyamide B of the matrix;
• b) arranging said part of fibre-reinforced composite material inside the cavity of a mould, said cavity having shape and/or size so as not to be completely occupied by said part;
• c) pre-heating and possibly thermoforming in the mould said part of fibre-reinforced composite material;
• d) injecting a molten polyamide C optionally loaded with a dispersed filler into the space of said cavity not occupied by said part of fibre-reinforced composite material;
• e) allowing the molten polyamide C to solidify, to form a non-fibre-reinforced part (20) optionally loaded with a dispersed filler and removing the manufactured article from the mould,
• wherein steps b) and c) can be performed in any chronological order.