PFAFF 3806

Integrated sewing station for closing rub-down seams

Working method

The photocell controls following functions at the seam end:

Automatic stopping of the machine with the needle down (which facilitates accurate positioning of the next part)
Chain cutting
Presser foot lifting

The length of the protruding thread chain can be set via parameter. The length of the starting thread chain is constant approx. 8 mm (-12/22) or 12 mm (12/23). The thread chain is clamped between sewing cycles and is not released until shortly after the next sewing cycle has begun. This ensures a reliable and seam start (and prevents the thread from being drawn into the needle hole). All the operator has to do is insert, guide and remove the workpiece.

Features

Highest Output of 2,000 pairs of shoes in 480 minutes, sewing an 8-cm-long
curved heel seam
Elastic and flexible seam; no bursting of the heel seam at high pressure
Sturdy sewing parts enable closing heel seams on shoes or boots made from heavier materials
Shift-free sewing of problem materials ensured by a favourable combination of feed mechanisms (top feed stroke can be set independently of the bottom feed stroke; in addition, the pressure of presser foot and vibrating presser can be varied separately)
Consistently high quality of the sewn parts, largely independent of the operator‘s skill, as a result of partial mechanization of the work cycle
Low training costs: The simple operation of the machine, reduced to a minimum by automatic control sequences (via parameter or photocell)
3806-12/22: For processing heavy fabrics
3806-12/23: For processing light to medium heavy fabrics as well as operations with narrow radii the bottom with trimming unit for the precise positioning of tape beginning and tape end