| 摘要 |
An apparatus for making convex goblets made of thermoplastic material starting from a goblet-like blank (10) obtained by molding with the thermoplastic material, comprising:
- a first station, which is constituted by an oven (11) for heating the blank (10) provided with cooling means (12) at the mouth (13) of the blank (10),
- a second station, constituted by a mold (14) that comprises two first parts (15), which have two complementary impressions (16) that reproduce the final shape of the goblet (10a) and a third part (17) constituted by a solid body (18) supported on a footing (19) of the second station, the solid body (18) having at least one portion (20), directed toward two two first parts (15), which is frustum-like, is shaped complementary to the mouth of the two first parts (15) and defines an annular element (21) that constitutes a resting region for the rim (22) of the blank (10), the solid body (18) being furthermore provided with an axial hole (23), which is centered on the mold (14) and widens into the frustum-like portion (20) so as to define a cavity (24), an elastic sealing gasket (25) being inserted in the cavity (24) and being deformable by penetration of an expander cone (26), which is centered and coupled to a cylindrical body (27) which is perforated for the passage of blowing air, the cylindrical body (27) being inserted in the axial hole (23) and being connected to mechanical means for translational motion. |
