Patent ID: 8496468
Filing Date: 2013-07-30
Classification: B29C

Abstract:
1. A blow valve of a blow-molding machine for containers, comprising a valve seat which is arranged in a valve chamber between at least one inflow channel mouth and at least one outflow channel mouth and has assigned thereto in the valve chamber a valve piston which is shiftable by a pilot control force linearly between a shut-off position abutting with a closing surface on the valve seat and a lifted open position and which with a piston extension carrying the closing surface passes sealingly shiftably through a bore of a wall defining the valve chamber, wherein a flow path which extends through the valve chamber between the mouths can be shut off in the shut-off position and released in the open position, and for the lateral forced deflection of the flow developing upon lifting of the piston extension in the flow path, the wall and the entirety of the piston extension in contact with the flow include respective trough-like recesses comprising at least one guide surface which is generally inclined relative to the shifting direction of the valve piston.