Method for producing pulling rolls for use in manufacturing sheet glass
A pulling roller and heat-resistant technology, applied in the field of flat glass manufacturing, can solve the problems of surface contamination surface defects, the pulling roller can not fully meet the high temperature and long life hardness contamination, sticking to the glass, etc.
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Embodiment 1
[0065] Example 1 - Pulling Roll Life
[0066] In a first example, pulling roll life was evaluated as a function of hardness. Such as figure 1 As shown, the longest pulling roll life is obtained when the average durometer hardness for a particular type of pulling roll is about 41. The longest average pulling roll life was obtained when the average durometer hardness was about 44. figure 1 The dot plot in shows the relationship between life and durometer hardness when the shaft is replaced.
Embodiment 2
[0067] Example 2 - Relationship Between Bulk Density and Hardness
[0068] In a second example, a series of pulling rolls were prepared and evaluated, as detailed in Table 1 below. For each row in Table 1, the sample refractory disks were compressed to a specific bulk density. The durometer hardness of each compressed sample was measured and averaged at six points along the length of the roll.
[0069] figure 2 The middle curve shows the relationship between the material's average durometer hardness and bulk density. Using this relationship, a roll having a predetermined range of durometer hardness can be manufactured by determining a corresponding range of bulk densities. The upper and lower limits in the middle curve show the predicted limits for each subsequent durometer value at various levels of bulk density.
[0070] For example, material A shown in Table 1 is at 0.9-1.2g / cm 3 The detection is performed under various bulk density conditions in the range. The har...
Embodiment 3-
[0074] Embodiment 3-comparative example
[0075] In a comparative example, an assembled knurled sheet product with a fixed compressed length could be produced. A number of heat resistant discs can be selected for the fixed length and the compression force adjusted as needed so that the discs are accommodated in the fixed length. The varying compressive force required to accommodate the disks in a fixed length results in varying hardness on the surface of the assembled knurled sheet product.
[0076] Rather, one aspect of the invention involves selecting a weight of refractory disc that, when disposed within a specific volume of a pulling roll, achieves a target overall density. As described in various embodiments of the present invention, such methods can provide improved uniformity and controlled hardness over conventional methods and materials.
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Abstract
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