| 摘要 |
<p>Thermoforming machine for molding and/or stamping articles from thermoplastic film, comprising upper and lower molds (23, 24) that are opened and closed by means of moving parts (6) comprising toggle clamps (8, 9) disposed symmetrically with respect to the mid plane (7) of the machine, comprises counterrotating drive motors (10) that operate the toggle clamps via cranks (11) mounted so that there are no moving parts in the vicinity of the mid plane. An independent claim is also included for operating a thermoforming machine as above by operating the cranks at different angles in their individual opening and closing cycles, the cycles being divided into individual sections in which the rotational speeds differ from one another so that the overall movement times remain equal.</p> |
