Silicon carbide in the glass industry use common sense

1, the cooling section and all of paragraph

Glass liquid flow through the process of cooling and all of paragraph should be uniform cooling of the molten glass to fit the molding temperature, if you do not take any measures, on both sides of the forehearth heat middle part less heat will cause the glass middle ofboth sides of the temperature gradient is large, i.e. the temperature unevenness of the same section of the molten glass, so that the viscosity of the molten glass is inconsistent, directly affect the molded mass, to reserve cooling hole in order to align the temperature of the feed solution, on the one hand, in the cooling section, by adjusting the cooling holes,how much the degree of opening to regulate the cooling of the intermediate portion of the cooling section of the forehearth, so that temperature uniformity; the other hand, the use of a dedicated silicon carbide auxiliary heating to achieve.Silicon carbide are generally uniformly arranged in the top of the molten glass in the forehearth, the molten glass to keep a certain distance from the downward radiation heating.In order to ensure the material Road, both sides of the heated middle of the unheated five rods (ie dual heating element silicon carbide) is generally used in the glass the forehearth industry dedicated silicon carbon rod.It is made up of two identical heating body and three cold end using a special process welded together, i.e. in two heating element indirectly a cold end, the total length of the three forehearth corresponding to the width of the material (in the importthe double threaded Road silicon carbide) in the middle part of the silicon carbide heat or less heat close to the side wall parts fever, coupled with reasonable design, you can guarantee that the glass liquid flow temperature uniformity decline.Forehearth design, some manufacturers also use the diameter-type silicon carbide (three silicon carbide), which is welded by a heating element and two cold end.

Forehearth choose three silicon carbide silicon carbide is heated glass solution was heated on both sides of the wall, so to ensure that the temperature of each section Forehearth, can play a supplementary role in the side wall of heat dissipation, but nowhere near the homogenizing effectfive silicon carbide.Homogenizing effect by the the forehearth structure and silicon carbide heating regardless of the selection of three rods or five rods, to decide, and Forehearth various sections eventually reach the high temperature by the control system to manipulate.

2 spout Section

Glass flow through homogenizer segment, the uniform temperature down to an appropriate value, if not controlled, the temperature of the spout at the still difficult to ensure that gobs have a constant and uniform temperature so that the temperature is too high or too low will affectThe gobs shape, the ultimate impact of the glass container forming quality.Thus, the scientific method is spout individually controlled.Spout heating generally have the following two forms:

(A) surround the choice of two gun-type silicon carbide and a three silicon carbide heating around the spout.

(B) The selection of the two slotted silicon carbide and a three silicon carbide cloth around the spout, spout heating.