How is manufacturing of TV glass shell different than traditional ceramic/glass industries?
The main requirements here are no tolerance for visual defects & tight dimension tolerances as in the final assembly at CRT plant; both panel and funnel are to be joined (fused) together. Each Glass Furnace has a Batch House where raw materials are stored and mixed as per formula (recipe). These raw materials are melted in a furnace. Production method differs depending upon the final shape of glass product desired. As TV glass shell has 2 glass parts – Panel & Funnel, there are 2 furnaces; separate for Panel & Funnel. To obtain shape of say any one of these, there is a hydraulic round press typically with 11 stations. Each Press has a set of MOLDs. Combination of Plunger, SHELL & MOLD gives gob (molten glass cut into proper weight) the desired shape. Panels are then inserted with studs & Funnels are inserted with (anode) Buttons. These glass items pass thro annealing lehrs. Inspection is carried out at lehr end for visual defects & each peace is checked for dimensions which is a critic
