JP2018095531A5

JP2018095531A5 -

Info

Publication number: JP2018095531A5
Application number: JP2016243500A
Authority: JP
Filing date: 2016-12-15
Publication date: 2019-09-12
Anticipated expiration: 2036-12-15

Description

上記の構成において、生産工程でガラスリボンの状態を検出するとともに、その検出結果に基づいてガラスリボンの生産不良が検出された時に、第二ローラの内部冷却温度を、生産工程における内部冷却温度から準備工程における内部冷却温度に切り替えてもよい。このようにすれば、生産工程でガラスリボンの生産不良が生じた時に、第二ローラの内部冷却温度を準備工程における内部冷却温度に自動的に切り替えることができる。 In the above configuration, as well as detect the state of the glass ribbon in the production process, when the production defects of the glass ribbon is detected based on the detection result, internal cooling temperature of the second roller, the internal cooling temperature in the production process To the internal cooling temperature in the preparation step. In this way, when the production failure of the glass ribbon occurs in the production process, the internal cooling temperature of the second roller can be automatically switched to the internal cooling temperature in the preparation process.

Claims

A method for producing a glass article using a downdraw method,
A production process in which the glass ribbon formed by the molded body is gradually cooled while being conveyed in a state of being sandwiched by upper and lower annealing rollers, and the glass that has flowed down from the molded body before the production process is moved by the annealing roller. With a preparatory step of sandwiching in order and bringing the glass ribbon closer to the shape,
The annealing roller is disposed in a first temperature region that is higher than the strain point of the glass ribbon in the production process, and in a second temperature region that is lower than or equal to the strain point of the glass ribbon in the production process. Second roller,
The method for producing a glass article, wherein the second roller has an internal cooling temperature in the production process higher than an internal cooling temperature in the preparation process.

The method for producing a glass article according to claim 1, wherein in the production step, the internal cooling temperature of the first roller is lower than the internal cooling temperature of the second roller.

The first roller includes a first shaft portion having a passage through which a cooling fluid can flow, and a first roller body provided in the first shaft portion,
The said 2nd roller is equipped with the 2nd axial part which has a channel | path which can distribute | circulate a cooling fluid inside, and the 2nd roller main body provided in the said 2nd axial part, The Claim 1 characterized by the above-mentioned. The manufacturing method of the glass article of 2.

The glass article according to claim 3, wherein an internal cooling temperature of the second roller is adjusted by changing a supply flow rate of the cooling fluid to the second shaft portion in the preparation step and the production step. Manufacturing method.

The method for producing a glass article according to claim 3 or 4, wherein the supply of the cooling fluid to the second shaft portion is stopped in the production process.

The second shaft portion is made of metal supported on both ends,
The second roller body is provided on both sides of the second shaft portion in the axial direction,
The said 2nd axial part has a metal exposure part between the said 2nd roller main bodies in the axial direction of the said 2nd axial part, The manufacture of the glass article of any one of Claims 3-5 characterized by the above-mentioned. Method.

The second shaft portion is made of metal that is cantilevered,
The method for manufacturing a glass article according to any one of claims 3 to 5, wherein the second roller body is provided on one axial side of the second shaft portion.

The preparation step includes an adjustment step of adjusting the thickness of the glass and the direction of warpage, and after the adjustment step, the internal cooling temperature of the second roller is changed from the internal cooling temperature in the preparation step to the production step. The method for producing a glass article according to claim 1, wherein the method is switched to an internal cooling temperature.

As well as detect the state of the glass ribbon in the production process, when the production defects of the glass ribbon is detected based on the detection result, internal cooling temperature of the second roller, the internal cooling temperature in the production process The method for producing a glass article according to claim 1, wherein the temperature is switched to an internal cooling temperature in the preparation step.

The method for producing a glass article according to any one of claims 1 to 9, wherein the glass ribbon after slow cooling in the production step is wound into a roll.