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Hot-wire foam cutter
A hot-wire foam cutter is a tool used to cut polystyrene foam and similar materials. The device consists of a thin, taut metal wire, often made of nichrome or stainless steel, or a thicker wire preformed into a desired shape, which is heated via electrical resistance to approximately 200°C. As the wire is passed through the material to be cut, the heat from the wire vaporises the material just in advance of contact.
The depth of the cut is limited only by the wire length. Width of cut is limited by throat, if any.
==Types of wire used==
* Preformed, manually or with pliers.
* Tensioned, held tight by a frame with springs or (equivalently) by a bow. Many indicate a preference for single-strand stainless steel wire over nichrome wire, in diameters ranging from .008 inches(0.2032mm) to .020 inches(0.508mm) for frame-tensioned cutters. Musical instrument strings and leader wire used for fishing lures are readily available and inexpensive. Commercial cutting equipment often uses the nickel-based alloy wire Rene 41, a high-strength alloy which maintains most of its tensile strength at cutting temperatures.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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