Molding apparatus for molding opening devices and packaging machine having a molding apparatus

Abstract

A molding apparatus for molding an opening device onto a packaging material web comprises at least one mold unit couplable to the packaging material web; and an injection device configured to inject molten polymer into the mold unit. The injection device comprises a cavity configured to receive the molten polymer, an inlet configured to allow for introduction of the molten polymer into the cavity, a first outlet configured to allow for an outflow of a first portion of the molten polymer from the cavity, a first valve element configured to selectively open and close the first outlet, a second outlet configured to allow for an outflow of a second portion of the molten polymer from the cavity, a second valve element configured to selectively open and close the second outlet and a pressurizing unit in fluidic connection with the cavity and configured to pressurize the molten polymer within the cavity.

Dependencies are inferred from the claim text.