Metal Finishing Guide Book

2011-2012 Surface Finishing Guidebook

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Page 36 of 707

Fig. 1. Sisal buffs. BUFF TREATMENTS Treatments may be applied to fabrics (mill treatment) or to the buff after assem- bly (dip treatment). Buff fabrics are frequently hardened and stiffened to promote faster cutting, softened for additional flexibility to conform to contours, strength- ened for longer buff life, or lubricated to prevent burning. Buff fabrics may also be treated to provide improved adhesion of buffing compound, to abrade for heavier cut, or to flameproof and make fire resistant. Treatments must be applied evenly and uniformly to avoid creating hard spots that cause uneven buff- ing. The treatment must not deteriorate with buff age. Unsuccessful treatments weaken the cloth and decrease buff life. CONVENTIONAL, FULL-DISK BUFF DESIGNS Unsewn Buffs Conventional, full-disk buffs are made with die-cut cloth disks. Unsewn, conventional full-disk buffs may be used for luster (Fig. 2). Loose disks are turned to allow the threads of the material to lie in different directions. This results in more even wear, avoiding a square shape after being put into use. One disadvantage of this con- ventional design is that the fabric can fray or ravel. When held against a wheel 35

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