Abstract: Bell-shaped mould for encapsulated articles with mouldable seal, formed by a piece comprising a nozzle (4) with vertical walls (5) and lampshade-shaded part (6) with a planar edge (7) and, opposite, a rod (8) with a through-hole (9) for inserting a guide (10) with slits (13) for the exit of the air from the seal (2). The guide (10) is a body in the form of a sword with a grip (11) for handling and with a rounded tip (12). The slits (13) are the cruciform-section configuration of the sword-like body of the guide. The mould is arranged in such a manner as to be grouped in a grid (15) of multiple units connected by connection segments (16) and provided with support feet (17). The mould is made from phosphorescent PP or PE plastic material.