Industry News

Window glass

Views : 325
Update time : 2015-12-08 11:20:15

An inferior kind of window glass, the materi- als of which are sand, kelp, and soap-boilers' waste,

is made by blowing the metal into cones, about a foot in diameter at their base ; and these, while hot, are  touched on one side with a cold iron dipped in water. In normal, it cut by window machine is more smooth.


This produces a crack, which runs through the whole length of the cone. The glass then expands into a sheet somewhat resembling a fan. This is supposed to be the oldest method of manufacturing window or plate glass.


The window glass produced in the manner first described, is called crown glass ; and the other, broad glass. But by neither of these methods can the lar- gest panes be produced.


The blowing for these differs from the methods just described, in that the material is blown into an irregular cylinder, open at its further end. When a sufficient number of these cylinders have accumulated, the end to which the blowing iron had been attached, is capped offby drawing round it a circle of melted glass, and the cylinder is divided longitudi-nally by touching it through its whole length with a hot iron.


The cylinders, in this state, are put into the annealing oven, where, by aid of a heat which raises the glass to redness, it is expanded into sheets. These sheets are then broken into panes of several sizes by the aid of a diamond and a straight edge, as in the case of glass blown by other methods. "

Related News
The role of hardware accessories for doors and Windows The role of hardware accessories for doors and Windows
Mar .08.2021
Hardware accessories is responsible for the frame of door window and door tightly coupled components, metal price is not high, not its existence, Windows will only become a death, will lose the meaning of the doors and Windows. We from the performance of