PURPOSE: To obtain a granular low melting alloy for sealing a fluorescent lamp which has a uniform compsn. and grain size and permits easy weighing and insertion through a capillary by dropping the low melting alloy in a molten state into a refrigerant and cooling quickly the same.
CONSTITUTION: A low melting alloy consisting of 15W57wt% Sn, 5W40% Pb, 30W72% Bi, 4W50% In or further 4W25% Hg, etc. is produced. Such alloy raw material 1 is charged into a vessel 3 and is heated by a heater 4 to keep the material melted. The molten alloy is extruded from a nozzle 2 and is successively dropped into a refrigerant 6, by which the alloy is quickly cooled and a granular alloy 7 is obtd. The bore of the nozzle 2 is preferably set at about 0.15W1.0mm, the distance between the nozzle 2 and a refrigerant liquid surface 8 at about 2W100mm and the extruding pressure from the nozzle 2 in an about 0.01W0.2kg/cm2 range. The low melting alloy for sealing a fluorescent lamp which has a uniform comps. and about 1.5W20mm grain size is easily obtd. by the above-mentioned method.
| JPS61239558 | MANUFACTURE OF FLUORESCENT LAMP |
| JPS5277487 | EXHAUST HEAD |
| JP2005332698 | IMAGE FORMATION DEVICE AND ITS MANUFACTURING METHOD |
HAGA MASAKATSU
YORIFUJI TAKASHI
OOSHIMA TERUO
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