APPARATUS FOR AIRFLOW CONTROL DURING THE GLASS FORMING IN A MOULD

摘要

Apparatus for airflow control at the glass forming in a mould, comprising a multi­ way valve (8), in which body (1) a piston valve (2) is placed. Behind the valve (8) an ejector (9) is arranged. The piston valve (2) is provided with a central hole (19) and in the body (1) of the valve (8) the piston valve (2) is placed slidingly in the direction of the longitudinal axis of the valve (8). In one extreme position the piston valve (2) fits closely to the sealing seat (17), and sealing part of the sealing seat (17) covers the central hole (19) of the piston valve (2). On the external edge of the sealing seat (17) at least one passage hole (18) is arranged. In the opposite extreme position the piston valve (2) by its central hole (19) connects to the interconnecting channel (4) and at the same time the piston valve (2) covers an input (5) of the pressure medium in the body (1) of the valve (8). Behind the sealing seat (17) in the body (1) of the valve (8) a reducing channel (6) is created, to which the ejector (9) is connected.