Volume : I, Issue : V, October - 2012

Improvements of Result: At H4 Cutting and Forming Machine

Bhasker Shrivastava

Abstract :

For making of glass H4 (Borosilicate), is used extensively in the glassblowing process lampworking, which involves using a burner torch to melt and form glass, using a high speed steel tool. H4 is referred to as "hard glass grade" which is used for making halogen lamp for auto vehicles. Raw glass used in halogen lampworking comes in hollow work tubes. H4 glass has a very low thermal expansion coefficient, about one–third that of ordinary glass. This reduces material stresses caused by temperature gradients, thus making it more resistant to eaking. This makes it a popular material for objects like halogen lamp, where it is essential to have very little deviation in shape. The softening point (temperature at which viscosity is approximately 107.6 poise) of type 7740 Pyrex is 820 °C (1,510 °F). The analyzed result from Nov.2011 to July2012 and gets the satisfactory results at H4 cutting and forming machine in halogen lamp making process.

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Article: Download PDF   DOI : 10.36106/ijsr  

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Bhasker Shrivastava Improvements of Result: At H4 Cutting and Forming Machine

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