Working with foam. Drawing, description

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Working with foam. home workshop

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I offer two ways to cut large sheets of foam. The nichrome thread is suspended vertically (Fig. 1) or stretched horizontally to the table surface (Fig. 2). By adjusting, in the first case, the distance from the thread to the movable guide angle and, in the second case, the height and angle of the thread relative to the table surface, it is possible to obtain workpieces of any shape and size. The expansion of the thread during heating is selected using a load.

By changing the distance between the movable contacts-clamps (of the "crocodile" type), the glow of the thread is regulated.

(click to enlarge)

When working with small foam blanks, there is no need to make a special frame to secure the nichrome thread. To do this, you can use an ordinary jigsaw or hacksaw, replacing the nail file or canvas with nichrome thread (Fig. 3). In this case, it is necessary to carefully isolate the current-carrying contacts on them. Isolate the moving part of the hacksaw that regulates the thread tension from the body with asbestos or a paper gasket, and the tension lamb with a textolite washer.

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