Exothermic Cutting
Exothermic cutting is facilitated by using an electrode fabricated from a single elongated strip of metal roll formed into a generally cylindrical elongated electrode shape. Electrodes can be continuously formed to length by randomly coining the strip before roll forming to facilitate breaking of individual electrodes from the roll formed product. Exothermic cutting using an electrode or burning bar of the type wherein a mass of metal is ignited in the presence of an oxidizing gas (e.g. oxygen) to form a flame or products of combustion which can be directed at a structural shape for cutting or piercing of the structural shape. In particular the invention relates to a lightweight portable self-contained system that can be used by such diverse parties as emergency rescue squads and metal reclaimers. An exothermic electrode provides a mass of oxidizable metal, and in the presence of an oxidizing gas (e.g. oxygen) and a source of ignition, will produce a flame which can be directed against a work piece which may be a part of a fixed land structure, marine structure or similar object. In the hands of a skilled operator a cutting, piercing or burning operation can take place.
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The electrode includes an outer hollow conductor, an inner conductor disposed inside and outer hollow conductor. The inner conductor is configured so as to form the boundaries of two chambers and configured to form a third chamber between the outer hollow conductor and an inner conductor. The three chambers are of substantially equal cross-sectional size whereby even gas flow is produced and even consumption of the electrode is provided. There are many cutting electrodes for use underwater and on land using the oxygen arc method, mentioned, supra. There are minor differences among these electrodes, the length of the electrode, for example, or the thickness of the conductor wall of the electrode. The major differences are the configuration of the internal conductor inserted inside the outer conductor, or the material from which the electrode is made. The slice cutting system uses a special torch that supplies oxygen and power to a patented arc air slice exothermic cutting rod. . Electrodes can be used to burn, cut of pierce structural materials such as cast iron, steel, concrete and rock, the latter being either natural or synthetic in air or under water. Reliable Paper products are produced with only the highest quality raw materials by an experienced team of dedicated professionals.
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