Equipment
There are two major types of equipment available for strapping: hand tools and strapping machines. A dispenser is used with both types of equipment to dispense the strap. Some strapping machines have the dispenser built-in, others have a separate powered dispenser, which can automatically load or thread new coils. Non-powered separated dispensers have a pulley which releases and activates a brake to stop the inertia of the coil to keep the strap from over-running onto the floor. Dispensers used on strapping machines have multiple pulleys to act as a way to store strap in a way that can be quickly dispensed. This is required otherwise the strapping machine will draw the strap faster than the dispenser can pay off.
Within hand tools there are manual and automatic tools. Manual tensioners and crimping systems are available for low volume applications. Automatic hand tools are used for higher volume applications. Automatic tools are available using a battery power source or compressed air. Both manual and automatic tools are available as combination tools, which perform the tensioning, sealing and cutting, or as separate tensioners, sealers, and cutters. Manual sealers for plastic strap always use a seal and a crimp joint. Manual and automatic hand sealers for steel can use a seal or a seal-less joint. Automatic hand for plastic strap use a friction weld.
Strapping machines, also known as bundlers, are used for high volume applications or special applications. They are available in horizontal and vertical orientations, however the vertical orientation is far more common. They are also available in bottom seal, side seal, and top seal orientations, which define where the joint is located on the bundle. They are available in semi-automatic and automatic varieties. The automatic versions are designed to be used inline with conveyor systems. A photoeye is used to detect when the bundle is in the correct location, stop the conveyors, and activate the strapping machine.
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