Tuyere sealing means and silencer

摘要

A tuyere sealing means and silencer having a bell-shaped nozzle. A plurality of cutouts are included in the nozzle and receive radially movable ramp-type valve elements which are adapted to engage with a seal with the plurality of a punch rod. The valve elements are moved radially outwardly of the nozzle against the force of spring means when the punch rod is inserted through the tuyere sealing means.