SAL self-contained hopper loaders are mainly used with injection moulding machines, extrusion machines, or other similar machines to realize the automatic conveying of plastic material. It also can collocate with the SICH or SCH collective hoppers to work as a buffer tank on the inlet of the injection moulding machine.

After the proper setup, the hopper loaders can work automatically and independently without frequent adjustment. For high installation positions, it's available to equip with an optional distal switch. The operator can work with the unit without going up and down.