Method and adjustable length mold for manufacturing a foamed packaging assembly

摘要

A package forming apparatus which produces containers by means of molding thermoplastic material. A mold having a fixed cross-section but a variable length mold cavity is provided by a mold core having a bottom ring means outer shell unit in operative association with the mold core but which is movable axially of the mold core to vary the operative length of the mold and a removable top end plate is provided for the mold cavity.