Manufacturing method of ceramic tube

Abstract

A manufacturing method of a ceramic tube comprises the following steps: a, an external mold and a wax-based internal mold are manufactured; b, the wax-based internal mold is positioned inside a holding cavity, and a gap between the wax-based internal mold and the holding cavity is left to form a cavity; c, a powder is poured into the cavity, and the powder is hardened to form a tube blank; d, the external mold is removed from the tube blank; e, the wax-based internal mold is removed from the inside of the tube blank; and f, the tube blank is sintered to form a ceramic tube. During the Step c, the powder is hardened by a static pressure method, and static pressure is set as 100kPa-200kPa / cm<2>. The Step e contains the following steps: e1, high temperature radiation is applied on the position where the wax-based internal mold and the tube blank are contacted by the use of external equipment, the temperature of the position where the wax-based internal mold and the tube blank are contacted is raised to more than 500 DEG C within 3-5 s, and the state lasts for 2-6 s; and e2, double heating is carried out on the wax-based internal mold so as to make the wax-based internal mold flow out. According to the manufacturing method, the internal mold and the powder have a single material component; no chemical reaction happens during the manufacturing process; and demoulding time is fast and the tube will not be cracked.

Description

technical field [0001] The present invention relates to the technical field of "connection or manufacture of tube shells, lead-in wires, and tube sockets", in particular to a method for manufacturing ceramic tube shells, and further, a method for manufacturing ceramic discharge tube shells used as lamp tubes. Background technique [0002] In recent years, with people's requirements for large-area indoor lighting, more and more ceramic discharge tube shells with higher color rendering are used in the manufacture of lamp tubes, although their operating temperature and luminous efficacy are lower than those of quartz tubes used in the past. The glass material is higher, but because its manufacturing shape is olive-shaped and needs to be manufactured in one piece, there are great technical difficulties. [0003] Existing ceramic shell method, such as the Chinese patent document CN102543623 disclosed by the applicant on July 4, 2012, includes the following steps: (1) providing an...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that the production efficiency of the ceramic shell in the prior art is low, the cost is high, and the environment may be polluted, but an inner mold with a single powder material component is provided. No chemical reaction occurs during the process, and the demoulding time is fast and the ceramic shell manufacturing method does not cause shell bursting

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