Fibre-reinforced polymer matrix composites (GFRP, CFRP, etc.) are becoming increasingly important in many manufacturing processes. In this regard and considering that one of the essential elements to control in any production process is cost optimization, the need to reduce the production times of parts made with composites is evident. Traditionally, GFRP or CFRP pieces have been cured in an oven at a certain temperature, so that their curing time is accelerated. In recent years, however, new technolgies have appeared that allow additives to accelerate this process in very interesting ways to optimize industrial processes. Specifically, photopolymerization proposes, through the adhesion of an additive to the compound, to accelerate curing by subjecting the piece to a light source. Traditionally, this type of technique has been used in chambers loaded with UV lamps to carry out this process. In the following project, an alternative system is proposed in which, by using LED lamps embedded directly in the mould, an equivalent result is achieved at a much lower cost. This project aims at the feasibility study of mechanical parts made of glass/polyester composite materials ny a "low cost" process of integrated photopolymerizatioon through a tooling type RTM Light. The idea is to replace the classical polymerization of the composite by exposure at room temperature or in an oven by a UV photopolymerization process as close as possible to the material via a translucent punch equipped with LED tapes. For this, a series of tests will be deveped in wich, using piezoelectric transducers and the variance in their capacitance as the cross-linking of the polymer occurs, its curing kinetics can be studied. This way, it is intended to continue previous stuies already carried out by the Polytech Annecy-Chambéry in which, on the one hand, this low-cost solution is proposed to carry out photopolymerization processes and, on the other hand, the use of piezoelectric transducers is studied as systems to instrumentalize the analysis of the cure of polyester resins.