Page 120 - Industrial Cutting of Textile Materials

Manual cutting equipment in textile cutting operations 107

when the operator's hand is removed from the lever. A separate on/off switch is situated
on the top of the machine. During the cutting process, the operator must wear special
protective gloves (see Fig. 8.8).

8.3.6 The disadvantages of working with a round-knife machine

The round shape of the cutting device significantly limits the height of the cut spread
that can be no more than approximately one-fourth of the knife diameter. As the sur-
face of the cutting device is large, the machine has limited manoeuvrability. It cannot
make an abrupt change in the cutting direction or cut contours with a large degree of
curvature. Because of the round shape of the cutting device, the machine cannot be
used to cut notches.

8.4 The small round-knife cutting machine (rotary shears)

Special small-sized round-knife cutting machines are available for cutting single or
multiple plies of material (for spreads up to 10 mm) (see Fig. 8.9). These differ in shape,
have a small diameter knife (typically 50 mm), and are light in weight (0.5–1.5 kg).

Fig. 8.8 Work process using protective gloves.