Patent EP-2230220-A1 (EP)
Inventor: DIEKAEMPER LARS
IPC: C03B9/193
Filed: 2010-01-22
Abstract: The plunger mechanism of a glass machine, comprises a compressed-air cylinder drive (3), with which piston (6) of plunger and/or plunger holder is connected, a comparison unit, and a signal giver. The feed area and the withdrawal area of the compressed-air cylinder drive are connected over a first and/or a second valve arrangement at a compressed air source (20, 28). 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. The plunger mechanism of a glass machine, comprises a compressed-air cylinder drive (3), with which piston (6) of plunger and/or plunger holder is connected, a comparison unit, and a signal giver. The feed area and the withdrawal area of the compressed-air cylinder drive are connected over a first and/or a second valve arrangement at a compressed air source (20, 28). 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 (12) corresponding to the result of an actual value/desired value related to the piston movement in the compressed air cylinder. The second valve arrangement by which the withdrawal area of the compressed air cylinder drive is connected at a pressure source is formed as three/two-way valve. 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 an actual value/desired value related to the piston movement in the compressed air cylinder. The first and the second valve arrangement are arranged in the form of a single valve component and are connected to a joint compressed air source. The first proportional valve and the second proportional valve are connected to an attenuator 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 (8) by which the actual position of the piston and the plunger mechanism and/or the plunger of the glass machine 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 (4) into the comparison unit is integrated 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. The signal indicating the feed process and/or the withdrawal process of the piston is applied on the control unit in the cooperation with the way-sensor by the signal giver.