Stirrer for glass manufacture

Patent metadata

Field	Value
Publication number	US-2016347638-A1
Application number	US-201415117415-A
Country	US
Kind code	A1
Filing date	Feb 25, 2014
Priority date	Feb 25, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

The present invention provides a stirrer for manufacturing glass including a stirrer shaft and a multi-staged rod-shaped stirrer blade fixed so as to penetrate through the stirrer shaft. This stirrer blade is a hollow cylindrical body including: a cylinder obtained by seam welding of two opposing sides of a flat plate made, for example, from strengthened platinum containing platinum or a platinum alloy as a matrix and metallic oxide dispersed in the plate; and a disk welded to an entire circumference of both ends of the cylinder and made from an identical material, and it penetrates so that a weld line crosses a center axis of the stirrer shaft, and is fixed so that a locus of an end portion of the blade forms a spiral shape. In addition, the rod-shaped stirrer blade has a core layer showing a dispersed structure that exists in a cross-sectional structure at a fixing portion with the stirrer shaft and does not receive heat effect resulting from fixing. The present invention is effective in stirring of molten glass having high viscosity, and has enhanced stirring operation and improved durability against deformation and damage.

First claim

1 . A stirrer for manufacturing glass, comprising a stirrer shaft and a multi-staged rod-shaped stirrer blade penetrating through and fixed to the stirrer shaft, wherein
the rod-shaped stirrer blade is a hollow cylindrical body comprising: a cylinder obtained by seam welding of two opposing sides of a flat plate made of strengthened platinum or a strengthened platinum alloy containing platinum or a platinum alloy as a matrix and metallic oxide dispersed in the plate; and a disk welded to an entire circumference of both ends of the cylinder and made from an identical material, the rod-shaped stirrer blade penetrates through the stirrer shaft so that a weld line due to the seam welding crosses a center axis of the stirrer shaft, and is fixed so that a locus of an end portion of the blade forms a spiral shape, and the rod-shaped stirrer blade has a core layer showing a dispersed structure that exists in a cross-sectional structure at a fixing portion with the stirrer shaft and is not thermally affected due to fixing.

2 . The stirrer for manufacturing glass according to claim 1 , wherein the stirrer blade is fixed at intervals of 10 to 20 mm from a previous step of the stirrer blade.

3 . The stirrer for manufacturing glass according to claim 1 , wherein the number of steps of the stirrer blade is 4 to 10.

4 . The stirrer for manufacturing glass according to claim 1 , wherein the stirrer blade has a core layer having a thickness of 0.1 to 1.0 mm on average in the cross-sectional structure at the fixing portion with the stirrer shaft.

5 . The stirrer for manufacturing glass according to claim 1 , wherein the strengthened platinum or strengthened platinum alloy constituting the stirrer blade has a zirconium oxide or an yttrium oxide dispersed in the blade as a dispersed metallic oxide.

6 . The stirrer for manufacturing glass according to claim 1 , wherein the strengthened platinum alloy constituting the stirrer blade has a platinum-rhodium alloy or a platinum-gold alloy as a matrix and contains a metallic oxide dispersed in the blade.

7 . The stirrer for manufacturing glass according to claim 2 , wherein the number of steps of the stirrer blade is 4 to 10.

8 . The stirrer for manufacturing glass according to claim 2 , wherein the stirrer blade has a core layer having a thickness of 0.1 to 1.0 mm on average in the cross-sectional structure at the fixing portion with the stirrer shaft.

9 . The stirrer for manufacturing glass according to claim 3 , wherein the stirrer blade has a core layer having a thickness of 0.1 to 1.0 mm on average in the cross-sectional structure at the fixing portion with the stirrer shaft.

10 . The stirrer for manufacturing glass according to claim 2 , wherein the strengthened platinum or strengthened platinum alloy constituting the stirrer blade has a zirconium oxide or an yttrium oxide dispersed in the blade as a dispersed metallic oxide.

11 . The stirrer for manufacturing glass according to claim 3 , wherein the strengthened platinum or strengthened platinum alloy constituting the stirrer blade has a zirconium oxide or an yttrium oxide dispersed in the blade as a dispersed metallic oxide.

12 . The stirrer for manufacturing glass according to claim 4 , wherein the strengthened platinum or strengthened platinum alloy constituting the stirrer blade has a zirconium oxide or an yttrium oxide dispersed in the blade as a dispersed metallic oxide.

13 . The stirrer for manufacturing glass according to claim 2 , wherein the strengthened platinum alloy constituting the stirrer blade has a platinum-rhodium alloy or a platinum-gold alloy as a matrix and contains a metallic oxide dispersed in the blade.

14 . The stirrer for manufacturing glass according to claim 3 , wherein the strengthened platinum alloy constituting the stirrer blade has a platinum-rhodium alloy or a platinum-gold alloy as a matrix and contains a metallic oxide dispersed in the blade.

15 . The stirrer for manufacturing glass according to claim 4 , wherein the strengthened platinum alloy constituting the stirrer blade has a platinum-rhodium alloy or a platinum-gold alloy as a matrix and contains a metallic oxide dispersed in the blade.

16 . The stirrer for manufacturing glass according to claim 5 , wherein the strengthened platinum alloy constituting the stirrer blade has a platinum-rhodium alloy or a platinum-gold alloy as a matrix and contains a metallic oxide dispersed in the blade.

Assignees

• Tanaka Precious Metal Ind
• Tanaka Precious Metal Ind

Inventors

• Shinohara Tetsuo
• Naganuma Tsutomu

Classifications

• C03B5/1875 Primary

  of the screw or pump-action type · CPC title

• C22C5/04

  Alloys based on a platinum group metal · CPC title

• C03B5/1675

  Platinum group metals · CPC title

• C03B5/187 Primary

  with moving elements · CPC title

• B01F27/90

  with paddles or arms · CPC title