PRODUCTION OF LOW MELTING ALLOY WIRE FOR SEALING FLUORESCENT LAMP

摘要

PURPOSE:To form a low melting alloy for sealing a fluorescent lamp to a uniform compsn. and wire shape and to permit easy weighing and sealing in a hermetic vessel by melting said alloy and injecting and cooling continuously the molten alloy from a nozzle to the surface of a rotary cooling body. CONSTITUTION:An alloy raw material 1 is charged into a vessel 3 and is heated and melted by an electric heater 4. The molten alloy material 1 is injected from a nozzle 2 onto the surface of a rotary cooling body 5 by the gas forced into the vessel 3 from above upon attainment of a prescribed temp. and is thereby quickly cooled to form a continuous alloy wire 6. The bore of the nozzle in this case is made 0.2-2.0mm.phi and the temp. of the low melting alloy to be injected is made higher by 10-100 deg.C than the m.p. thereof. The rotating speed of the body 5 is made 0.2-5.0m/sec and an annular hollow groove 7 is preliminarily formed along the circumferential direction on the surface of the body 5.