The compressed air will push the piston within air cylinder. The upper part of piston and vibrating bar is connected with the rocking pin, so the vibrating bar will press the lapped part of packaging belt when moving down.
There is an elliptic hole at the center of vibrating bar. This hole is connected with the eccentric shaft of pneumatic motor. The pneumatic motor rotates at a high speed (10000rpm), so the vibrating bar conducts reciprocal motion quickly. Hence, the lapped part of packaging belt is fused by the heat produced by friction. When the vibration timer reaches the set time, vibration stops and fusion completes.
Both upper and lower parts of the packaging belt are stuck while extruding.
When tension straps,if the strap gets deviated,you can press this button to loose the strap and adjust it.After Finsih tensioning and welding,you need to press button to take down the machine