| 摘要 |
Sealing station in a thermoforming machine, comprising a thermoforming machine having upper (2) and lower (3) tool parts moved relative to each other by a drive unit (4), is new. An intermediate plate (6) is located between the drive unit and tool upper or lower parts. Pressure chambers in the intermediate plate are linked to a pressure source via pressure lines (8). Sealing station in a thermoforming machine, comprising a thermoforming machine having upper (2) and lower (3) tool parts moved relative to each other by a drive unit (4), is new. An intermediate plate (6) is located between the drive unit and tool upper or lower parts. Pressure chambers in the intermediate plate are linked to a pressure source via pressure lines (8). The machine has two intermediate plates (6) and both upper (2) and lower (3) tool parts are supported on one of the intermediate plates. The first pressure chamber is at the center of the intermediate plate and has dimensions corresponding to the minimum sealing surface. A second pressure chamber in located adjacent to the first pressure chamber in the conveying direction of the cover film and/or supporting film and/or transverse to the conveying direction. Further pressure chambers are located adjacent to and following the second pressure chamber in the film conveying direction and/or transverse to this direction. Shut-off valves and pressure reducers are included in the pressure supply lines (8). Corresponding pressure chambers in the upper intermediate plate and lower intermediate plate are the same size and are connected by lines (12). The tool drive system (4) is an eccentric drive which acts on the lower intermediate plate. Both the upper intermediate plate and tool upper part are mounted on an upper traverse (5). A rigid piston (14) in the intermediate plate directly transfers force from the tool drive system. Pressure is generated by an oil-free compressed air. |
