Patent EP-2230218-A1 (EP)
Inventor: DIEKÄMPER LARS
IPC: C03B9/353
Filed: 2010-01-22
Abstract: The form opening- and form locking mechanism of a glass machine, comprises a compressed-air cylinder drive (3), by which piston (6) of the form opening- and form locking mechanism is adjustable, a comparison unit and a signal giver. The feed- and withdrawal areas (19, 27) of the compressed-air cylinder drive are connected over a first and/or a second valve arrangement at a compressed air source (28). The second valve arrangement by which the withdrawal area of the compressed-air cylinder drive is connected at the compressed air source is formed as proportional valve. The form opening- and form locking mechanism of a glass machine, comprises a compressed-air cylinder drive (3), by which piston (6) of the form opening- and form locking mechanism is adjustable, a comparison unit and a signal giver. The feed- and withdrawal areas (19, 27) of the compressed-air cylinder drive are connected over a first and/or a second valve arrangement at a compressed air source (28). The second valve arrangement by which the withdrawal area of the compressed-air cylinder drive is connected at the compressed air source is formed as proportional valve, whose flow cross-section is regulatable by a control unit corresponding to the result of desired value/actual value related to the piston movement in the compressed air cylinder. The first valve arrangement by which the feed area of the compressed air cylinder drive is connected at the pressure source is formed as three/two-way valve. The first valve arrangement by which the feed area of the compressed-air cylinder drive is connected at the compressed air source is formed as proportional valve, whose flow cross-section is regulatable by a control unit corresponding to the result of the desired value/actual value related to the piston movement in the compressed air cylinder. The second proportional valve and the first valve arrangement formed as three/two-way valve or as first proportional valve are connected to a damping arrangement by which a compressed air flow leaving the compressed-air cylinder drive is swirled. The piston pole of the compressed-air cylinder drive is associated to a way-sensor by which the actual position of the piston and the form opening- and form locking mechanism is detectable and is connected to a signal evaluation unit by which the way sensor signals in position-, speed- and/or acceleration data and/or actual value of the piston movement in the compressed-air cylinder are convertible. The signal evaluation unit of the way-sensor and a feed-/output unit by which the desired value for the piston movement in the compressed-air cylinder is integrated into the comparison unit are connected to the comparison unit by which the actual value is compared with the desired value for the piston movement in the compressed-air cylinder and a signal corresponding to a deviation of the actual value from the pre-determined value is applied to the control unit. A signal indicating the feed process and/or the withdrawal process of the piston is applied on the control unit in cooperation with the way-sensor by the signal giver.