A charging system for feeding processing material to at least one extruder screw including a hopper configured to conduct the processing material along a feed direction to the extruder screw, and a material reservoir for the gravity-driven feeding of the processing material to the hopper. The charging system also includes a feeding device via which processing material recirculated at the hopper against the feed direction by action of the extruder screw can again be conveyed in the direction of the extruder screw together with processing material fed from the material reservoir.

Provided a method for supplying a resin by which appropriate replacement of a cartridge enables resin supply to be performed appropriately. The method for supplying a resin includes: a primary resin supplying step of supplying a liquid resin contained in a first cartridge to a supply target, the first cartridge having a remaining amount of liquid resin smaller than a target supply amount appropriate for one-time resin supply to the supply target; a cartridge replacing step of replacing, after the primary resin supplying step, the first cartridge with a second cartridge already subjected to dripping out; and a secondary resin supplying step of supplying a liquid resin contained in the second cartridge to the supply target after the cartridge replacing step.

In order to provide a filling apparatus which is capable of advantageously delivering a foamable material having a necessary amount into a closed cross section of a vehicle body, in an embodiment of the present invention, there is provided a filling apparatus for filling a closed cross section of a vehicle body with a foamable material is provided, wherein the foamable material is a foamable two-liquid polyurethane material, wherein the filling apparatus comprises a delivering part for delivering the foamable material into the closed cross section of the vehicle body, and wherein the filling apparatus further comprises an input part into which a delivery command value and correction values to set a real delivery amount are input.

Provided a method for supplying a resin by which appropriate replacement of a cartridge enables resin supply to be performed appropriately. The method for supplying a resin includes: a primary resin supplying step of supplying a liquid resin contained in a first cartridge to a supply target, the first cartridge having a remaining amount of liquid resin smaller than a target supply amount appropriate for one-time resin supply to the supply target; a cartridge replacing step of replacing, after the primary resin supplying step, the first cartridge with a second cartridge already subjected to dripping out; and a secondary resin supplying step of supplying a liquid resin contained in the second cartridge to the supply target after the cartridge replacing step.

In order to provide a filling apparatus which is capable of advantageously delivering a foamable material having a necessary amount into a closed cross section of a vehicle body, in an embodiment of the present invention, there is provided a filling apparatus for filling a closed cross section of a vehicle body with a foamable material is provided, wherein the foamable material is a foamable two-liquid polyurethane material, wherein the filling apparatus comprises a delivering part for delivering the foamable material into the closed cross section of the vehicle body, and wherein the filling apparatus further comprises an input part into which a delivery command value and correction values to set a real delivery amount are input.