After shaping, glassware suffers from internal strain, which reduces its strength. Annealing techniques are used to relieve these stresses, and the effect of glass processing is comparable to that of metal processing.
Annealing heats the glass to a high temperature and keeps it there for a long period to reduce stress and temperature gradients, then gradually cools the glass to prevent stress, and lastly quickly cools the glass to ambient temperature. It’s something I’m going to do. Annealing is often performed at a temperature of 500 ° C (900 ° F).
The thickness of the glass affects how long the product maintains warmth and how quickly it heats and cools during the cycle. According to the standard rule, the required annealing time increases in proportion to the square of the thickness.
For modern glass producers, annealing is done in an annealing furnace. The annealing furnace is a tunnel furnace equipped with a conveyor belt that gently transports the goods through the heating chamber. To guarantee that the glass goes through the required heating and cooling cycles, just a burner is positioned at the front of the chamber.