Body Buckling
By the looks of things, this can got straight up smooshed in the seamer. This can on the left came from a brewery that had recently switched can suppliers, and although the general size of the can was the same, the exact specs for pin height were not referenced before the run. Pin height is the measurement between the raised lifter pad and the chuck. We will also see this type of damage when the spring pressure in the lifter is set too high, in essence slamming the can into the chuck and crushing it. Lastly, body buckling may occasionally be caused in the filler when the snift times are set long with the limiting nuts are set too high. Once the pressure in the can is low enough, the fill heads crunch the body of the can.
Order Of Operations:
Ensure pin height is correct, when compared to your provided spec sheet for your specific can size. Adding or removing shims as needed.
Check that spring pressure is within range (110-120 ft lbs).
You may want to check the housing of the lifter and make sure that either;
The spring is not broken.
the housing isn't filled with gunk, keeping the spring from compressing.
Reduce the throttle for the lifter in quarter turn clockwise increments to decrease lift speed/force.
Check that the height of the cans are reflective of the spec sheet you have been given and not outside of their tolerance.
***If your pin height is unknown, the equation for setting pin height is:
Can Height - Lid Countersink - .042 = Pin Height.***
