Composite body for industrial vehicle, construction method and mouldings

A composite material body for a heavy-duty vehicle comprising a main body and a tailgate. The main body consisting of a base, a front wall and two lateral walls comprises structural reinforcements in a porous material and is produced by vacuum infusion molding using a rigid mold and a flexible counter-mold. Independent claims are also included for a method of producing the body including the steps of: (i) waxing a rigid mold; (ii) placing of a first mat and inserts; (iii) placing of a first skin of fibers; (iv) placing of first structural reinforcements on the first skin; (v) placing of the core of optionally preformed balsa and/or PVC foam; (vi) placing of a second skin; (vii) placing of a flexible counter-mold over the ensemble; (viii) airtight fitting together of the edges of mold and counter-mold; (ix) creation of a vacuum between them; (x) feeding in resin; (xi) polymerization; (xii) demolding; (xiii) finishing and for a mold and counter-mold to implement the method.