METHOD FOR MANUFACTURING GLASS CONTAINER

Title:

METHOD FOR MANUFACTURING GLASS CONTAINER

Document Type and Number:

WIPO Patent Application WO/2018/123073

Kind Code:

A1

Abstract:

Provided is a method for manufacturing a glass container, the method being capable of precisely controlling the position and size of an air bubble to manufacture, with good yield, a glass container having an isolated air bubble in the bottom. The method for manufacturing a glass container having a mouth, a body, and a bottom is characterized by including: a step of forming a glass container having no air bubble formed therein from molten glass; a step of inserting a needle-like object into the bottom of the glass container having no air bubble formed therein, then removing the needle-like object to form an air bubble forming passage; a step of injecting air from the entrance of the air bubble forming passage and forming an inner space in the shape of an inverted tear drop extending from the air bubble forming passage in the bottom of the glass container having no air bubble formed therein to thereby obtain a glass container having an inner space that communicates with the outside; and a step of blocking the entrance of the inverted tear drop-shaped inner space by causing pre-cured glass to flow by the heat retained in the pre-cured glass to obtain a glass container having an air bubble isolated from the outside in the bottom.

Inventors:

SASAKI YUYA (JP)
ARAI KENJIROU (JP)

Application Number:

PCT/JP2017/005105

Publication Date:

July 05, 2018

Filing Date:

February 13, 2017

Export Citation:

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Assignee:

KOA GLASS CO LTD (JP)

International Classes:

C03B9/31; C03B9/335

Foreign References:

JPS5585428A	1980-06-27
JP2002020128A	2002-01-23
JPS5125514A	1976-03-02
JPS557503A	1980-01-19
JPS557503A	1980-01-19
JPS5585428A	1980-06-27

Other References: