Downstream rolls for glass manufacture and methods

Patent metadata

Field	Value
Publication number	US-10144667-B2
Application number	US-201213605439-A
Country	US
Kind code	B2
Filing date	Sep 6, 2012
Priority date	Sep 6, 2012
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A downstream roll for glass manufacture comprises at least one millboard piece. At least a portion of an outer peripheral surface of the downstream roll comprises infiltrated ceramic particles. The infiltrated ceramic particles are infiltrated to a depth of about 1 mm to about 10 mm. Further examples of the disclosure include methods for manufacturing a glass ribbon and a downstream roll for glass manufacture.

First claim

What is claimed is:

1. A method for manufacturing a glass ribbon, the method comprising the steps of:
(I) forming a glass ribbon; and
(II) engaging a first edge portion of the glass ribbon with at least one roll; wherein the roll comprises:
a non-infiltrated portion comprising millboard, the millboard having a compressed density between 0.85 g/cc and 0.97 g/cc; and
an outer peripheral portion comprising millboard infiltrated with ceramic particles, the outer peripheral portion having a depth between about 1 mm and about 10 mm;
wherein the ceramic particles are selected from the group consisting of SiO 2 , Al 2 O 3 , ZrO 2 , and mixtures thereof,
wherein the roll comprises between about 1 wt % and about 5 wt % of ceramic particles,
wherein a shore D hardness of the non-infiltrated portion is less than 41 and a shore D hardness of the outer peripheral portion is greater than 45, and
wherein the roll has a spring constant of less than about 4550 N/mm.

2. The method of claim 1 , wherein the step of forming the glass ribbon comprises introducing molten glass into a forming apparatus comprising an upper trough portion and a lower wedge portion.

3. The method of claim 2 , wherein the step of forming the glass ribbon further comprises fusion down-drawing the glass ribbon from the forming apparatus.

4. The method of claim 2 , wherein the roll is positioned downstream from the forming apparatus.

5. The method of claim 2 , wherein step (II) includes driving the at least one roll to pull the edge portion of the glass ribbon from the forming apparatus.

6. The method of claim 1 , wherein the roll comprises a plurality of millboard discs or a monolithic millboard roll.

7. The method of claim 1 , further comprising engaging a second edge portion of the glass ribbon with an additional roll comprising a non-infiltrated portion comprising millboard and an outer peripheral portion comprising millboard infiltrated with ceramic particles to a depth between about 1 mm and about 10 mm.

Assignees

• Langensiepen Ralph Alfred
• Lu Yanxia Ann
• Miao Weiguo
• Corning Inc

Inventors

• Langensiepen Ralph Alfred
• Lu Yanxia Ann
• Miao Weiguo

Classifications

• C03B17/064 Primary

  by the overflow downdraw fusion process; Isopipes therefor · CPC title

• C03B17/068

  Means for providing the drawing force, e.g. traction or draw rollers · CPC title

• C03B35/181

  Materials, coatings, loose coverings or sleeves thereof · CPC title