Blow moulding machine with a pneumatically operated blow air valve and a method for operating such a blow moulding machine
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Sep 15, 2014
filing date -
Sep 13, 2013
priority date (Note) -
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Abstract
An apparatus for molding plastic preforms into plastic containers, includes an application unit for applying a gaseous medium onto the plastic performs. The application unit includes at least one valve unit for controlling the gaseous medium to be supplied to the plastic preform. The valve unit has a working piston that is movable between at least two positions, and a control piston that is movable between at least two positions. Movement of the control piston is coupled, at least at times, to movement of the working piston. The valve unit includes a sealing unit that substantially prevents a gas flow between the working chamber and the control chamber at least in one position of the working piston and a membrane body that seals at least one area of the control piston against at least one area of the control chamber.
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