Types of stretch wrappers
There are basically three types of stretch wrappers: manual, semi-automatic and automatic.
With manual wrapping, an operator applies film to the load unit without the use of a machine. Semi-automatic stretch wrappers perform this task autonomously and wrap the palletised goods with stretch film. There are basically two types of semi-automatic machines: turntable wrappers and rotary arm wrappers. With turntable wrappers, the load rotates on a turntable in the wrapping zone; on rotary arm models, the load remains still while a spinning arm with the stretch film rotates around the goods and applies the film.
Automatic stretch wrappers are generally categorised as ring wrappers, among others. The film rolls are attached to a rotating ring that revolves around the pallet. Depending on the wrapping program, the ring moves up and down. Unlike turntable machines, the packaged goods remain stationary during the wrapping process.
Fully automatic ring wrappers enable a high throughput of up to 160 pallets per hour. This level of performance is especially important in automated lines and offers a clear advantage over semi-automatic stretch wrappers, which are not capable of operating at such high speeds.