Title:
ガラス管の製造方法
Document Type and Number:
Japanese Patent JP6911331
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a glass tube, the manufacturing method being capable of improving a quality of a relatively large-sized glass tube.SOLUTION: A manufacturing method is provided in which a molten glass Ga is formed into a cylindrical shape by flowing down the molten glass Ga along a compact 20, a formed cylindrical shaped molten glass Ga is heated in a heating furnace 30 to make it a softened state, then a glass tube G is formed by solidifying it through a slow cooling, the glass tube G is formed to a predetermined tube diameter and a length with an inside of the glass tube G vacuumed when the formed glass tube G is cut into a predetermined length, the glass tube G is sealed at a predetermined cut position P, and the glass tube G is cut (wrenched off).SELECTED DRAWING: Figure 1
Inventors:
Yonezawa Takedai
Tatsuya Tanaka
Tatsuya Tanaka
Application Number:
JP2016221193A
Publication Date:
July 28, 2021
Filing Date:
November 14, 2016
Export Citation:
Assignee:
Nippon Electric Glass Co., Ltd.
International Classes:
C03B17/04
Domestic Patent References:
| JP2012167004A | ||||
| JP2008516875A | ||||
| JP2000203864A | ||||
| JP48041247B1 | ||||
| JP7138037A | ||||
| JP52125521A | ||||
| JP2002531366A |
Attorney, Agent or Firm:
Yanouchi Foreign Patent Office