Patent EP-2230219-A1 (EP)
Inventor: DIEKAEMPER LARS
IPC: C03B9/36
Filed: 2010-01-22
Abstract: The blowhead mechanism of a glass machine, by which a blowhead is pivotable to the finished molds after introducing parison into the finished molds of the glass machine, pivoting away an inverter mechanism of the machine and reheating the parison, comprises a compressed air cylinder drive (3), where the blowhead is pivotable using a piston (6) of the cylinder drive, and a comparison unit, to which a signal evaluating unit (9) of a displacement sensor (8) and an input-/output unit are connected. A feed- and a discharge chamber of the cylinder drive are connected to a compressed air source. The blowhead mechanism of a glass machine, by which a blowhead is pivotable to the finished molds after introducing parison into the finished molds of the glass machine, pivoting away an inverter mechanism of the machine and reheating the parison, comprises a compressed air cylinder drive (3), where the blowhead is pivotable using a piston (6) of the cylinder drive, and a comparison unit, to which a signal evaluating unit (9) of a displacement sensor (8) and an input-/output unit are connected. A feed chamber and a discharge chamber of the cylinder drive are connected to a compressed air source over a first- or second valve device. The second valve device, by which the discharge chamber is connectable to the compressed air source, is formed as proportional valve, whose flow cross-section is controlled by a control unit corresponding to the result of target value/actual value comparison related to the piston movement in a compressed air cylinder (4). The first valve device, by which the feed chamber is connectable to the compressed air source, is formed as three/two-way valve or as proportional valve, whose flow cross-section is controlled by the control unit corresponding to the result of target value/actual value comparison related to the piston movement in the compressed air cylinder. The first and second valve devices are arranged in the form of a single valve construction unit and are connected to the common compressed air source. The second proportional valve and the three/two-way valve or the first proportional valve are connectable to a damping device, by which the compressed air stream leaving the compressed air cylinder drive is damped. The displacement sensor, by which the actual position of the piston and the blowhead mechanism or the blowhead of the glass machine is detectable, is arranged to a piston rod (5) of the cylinder drive and is connected to the signal evaluating unit, by which the displacement sensor signals are convertable into position data, speed data and/or acceleration data or actual value of the piston movement in the compressed air cylinder. The target value are inputted into the comparison unit by the input-/output unit for the piston movement in the compressed air cylinder. The actual value is compared with the target value by the comparison unit for the piston movement in the compressed air cylinder, where a signal corresponding to the deviation of the actual value from the target value is applied to the control unit. The blowhead mechanism includes a signaler, by which a signal indicating the feed operation or discharge operation of the piston is applied to the control unit in cooperation with the displacement sensor.