| 摘要 |
Disclosed is a machine that comprises a moulding cavity (11) with an entry opening and a male part (70) moved by an actuating mechanism between a withdrawn position and a position of insertion in the moulding cavity (11). The moulding cavity (11) comprises: a number, an integer greater than two, of single-wall folding elements (12); an equal number, an integer greater than two, of compound-wall folding elements (13, 13X, 13Y) disposed around the path of the male part and between the single-wall folding elements, defining a polygon; and a equal number, an integer greater than two, of pairs of pressing paddles (14) disposed such that the pressing paddles (14) of each pair flank one of the compound-wall folding elements (13, 13X, 13Y). The pressing paddles (14) are moved, by paddle actuators (15), between retracted position and a pressing position. |
