Page 125 - Industrial Cutting of Textile Materials

112 Industrial Cutting of Textile Materials

Fig. 8.14 Cloth drill machine by Eastman.
8.7 The hot notching machine

The hot notching machines burn notches on the edges of component bundles (see
Fig. 8.16) (see Chapter 7, Section 7.3.1). These ‘V’-shaped notches have a greater
visibility on loosely structured or knitted materials than the slit notches performed by
straight-knife machines. The notches may be made on fabric spreads up to 250 mm in
height. The weight of notching machines varies between 5 and 7 kg.
The hot notching machine consists of the following main parts: (1) electrical cable,
(2) heat regulator, (3) heated edge, (4) depth guides, (5) handle, (6) on/off switch,
(7) motor, and (8) base plate (see Fig. 8.17).

8.7.1 The heated edge
The hot notching machine has a vertical heated edge that burns a notch into the edge
of the component bundle. It has a fixed or adjustable depth guide to prevent the notch
from being made too deeply. The edge may be heated up to 700°C, depending on the
properties of the fabric.