KNOCKED DOWN FLANGE

Knocked Down Flange is a critical defect and occurs when the cover and body hooks do not interlock in a localized area of the double seam which is usually 1 to 2 inches in length.

POTENTIAL CAUSES:

  • Damaged body flange.

  • Mushroomed flange.

  • Incorrect seamer setting.

  • Damaged cover.

  • Seaming lever sluggish.

  • Product knocking down flange at make up.

  • Incorrectly set chuck bell cover guide.

SUGGESTED REMEDY:

  • Check can handling system for smooth transfer of can.

  • Check filler and incoming cans from can manufacturer.

  • Check cap feed and can feed chain fingers for proper timing.

  • Check cap centering cam setting.

  • Check seaming lever for broken springs and proper end play setting.

  • Keep seamer clean and control product filling.

  • Rest chuck bell cover guides to end clearance at .10” - .20” to both front and back.