Patent ID: 7138083
Filing Date: 2006-11-21
Classification: B28B,H01J

Abstract:
1. A method for manufacturing an arc tube body, which comprises a main tube portion to be a discharge space and thin tube portions for accommodating electrodes, using a pair of molds and a material to be injected thereinto, comprising at least: disposing a core in a hollow space formed by the molds before injecting the material, the core comprising portions for forming an internal shape of the thin tube portions, a portion for forming an internal shape of the main tube portion, and a shaft disposed in the portions for forming an internal shape of the thin tube portions; injecting the material into a space between the molds and the core, the material being a slurry containing ceramic powder, a solvent, and a hardening agent as main components; forming a hardened slurry by solidifying the slurry injected into the hollow space where the core is disposed; taking out the hardened slurry integrated with the core from the molds and separating the hardened slurry and the core; and firing the hardened slurry from which the core has been separated.