Hot Wire Cutter: Modification of Gas Stick Into Portable Styrofoam Cutting Tool - Video

This video demonstrates how to make a simple hot wire cutter by utilizing thermal energy from a gas match fire to heat a metal wire. Technically, a wire installed vertically above the fire pit serves as a heat conductor that will reach a high temperature point in a short time. The working principle relies on the transfer of heat by conduction from the flame to the wire, so that the wire is able to melt polymer materials such as styrofoam or foam when in contact.

The wire used is most likely a thin steel or nickel wire that has a melting point far above the temperature of a gas match fire, but is able to retain heat well. Tying the wire to the match body using a thread winding or additional wire aims to maintain the stability of the wire position so that it remains right in the flame path. The use of this tool is very effective for processing small details or cutting curved profiles on styrofoam which is difficult to do with an ordinary knife because of the risk of breaking the foam granules.

In terms of technical safety, this modification has a risk to the integrity of the plastic structure if used for a long time, because the heat from the wire can spread to the gas valve. Therefore, the use of this tool should only be for a short duration (intermittent use) to avoid melting the internal components of the match. Cutting styrofoam with hot temperature also releases chemical vapor, so the work is recommended to be done in an area with good ventilation.

This tool is a practical solution for mock-up or handicraft hobbyists who need a hot cutting tool without relying on electricity. The cutting efficiency depends on the diameter of the wire; the thinner the wire, the smaller the width of the cutting path (kerf), which results in a more precise and neat cut.