METHOD OF APPARATUS BOBBIN FOR AUTOMATIC FIRE SENSING WIRE

摘要

PURPOSE: A bobbin manufacturing method for an automatic fire detecting wire is provided to measure the precise resistance value according to temperature change, and to uniformly measure the resistance value for each internal sections of the fire detecting wire through a uniform mixing. CONSTITUTION: A bobbin manufacturing method for an automatic fire detecting wire includes following steps; manganese oxide, nickel oxide, chrome oxide, ethanol, and milling balls are agitated and mixed for three days; a mixed solvent is produced by drying the mixed raw material after filtering and removing ethanol; a subsidizing solvent is produced by mixing a lubricant, polyvinyl alcohol, and liquid paraffin; the mixed solvent and the subsidizing solvent are mixed, and the mixture is aged by treating with heat; a bobbin is formed in a rod shape by pouring the fermented mixture into a mold; and the rod shaped bobbin is dried and treated with heat.