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Vacuum Sack Lifter
GRIPPING SYSTEMS FOR VACUUM SACK LIFTING
The suction cup is where the grip is decided. RHS builds two for bags, and what sets them apart is the power source behind the vacuum.
For more than 20 years the electric pump suction cup has been the RHS reference for bag handling. Its integrated vacuum pump overcomes the pressure difference between the suction cup and the aspirating system, and that is what keeps the grip firm when the sack is anything but flat. The rubber lower lip adapts to the irregular surface of a filled bag, while an internal net stops residues from being drawn into the circuit. Available in several sizes, it is suited to 90% of the bags handled worldwide.
Where electricity itself is the hazard, the Venturi suction cup takes it out of the equation. It works without electrical power, pumps or solenoid valves, which makes it the natural choice for ATEX environments, where an ignition source can trigger an explosion. Fewer components also mean simpler upkeep: periodic maintenance is quick and easy, a concrete advantage on lines that cannot afford long stops.
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Manipulators for your vacuum bag lifter
The suction cup grips; the manipulator decides where the sack can go. RHS builds the bag version in three configurations sharing the same core: electric pump, suction tube between vacuum pump and suction cup, electrical panel with thermostat for pump management and a balancing system with a depression membrane. What changes is how the machine is anchored and how far the operator can move with the load.
Floor-mounted or self-standing, the column manipulator is built for the fixed workstation, where stability matters more than reach. Its arm rotates 360° around the main axis, so the operator can serve several points around a single anchor without carrying the load across the floor.
Application example: sacks picked from a pallet next to the station and placed on a hopper, a mixer inlet or a bag-tipping shelf, cycle after cycle, with the operator’s effort reduced to guiding the load.
When the floor is occupied by pallets or conveyor belts, the fixed ceiling-mounted manipulator moves the mounting bracket into a raised position. Its suspension system can be adapted to existing structures or designed for independent installation.
Application example: depalletising sacks onto a conveyor in a crowded area, where a column base would take room away from the flow of materials.
Where sacks travel along a line rather than around a point, the sliding ceiling manipulator runs on rails, moved by hand or with a pneumatic motor controlled by the operator. The trolley can be free or motorised, depending on distances and cycle times.
Application example: picking sacks from a row of pallets to feed several stations in sequence, or palletising at the end of a packing line across a wide working area.
