Iimpawu zokusebenza: Uhlobo lwamva nje lwe-PVC yombane yokuvelisa i-bushing line line ithatha i-twin-screw extruder enemveliso ephezulu kunye nokusebenza kakuhle kweplastiki, kwaye ixhotyiswe nge-mold elungiselelwe ukuyila kwendlela yokuhamba. Imibhobho emine ikhupha ngokulinganayo kwaye isantya se-extrusion sikhawuleza. Iitanki ezine zokupholisa i-vacuum ziyakwazi ukulawulwa ngabanye kwaye zilungelelaniswe ngaphandle kokuchaphazela omnye nomnye kwinkqubo yokuvelisa.