After the glass sheet is treated by glass tempering furnace, the pitting phenomenon will appear. The pitting phenomenon is also a kind of appearance quality defect of tempered glass. The following main reasons are listed: moisture-proof powder on glass is damped and pasted on glass or there are impurities on glass surface, and it is not cleaned before tempering; the upper furnace of heating furnace is insulated and falls off; the glass is not cleaned after grinding, and it is stored for a long time. Residual glass powder is dried and not cleaned before tempering; ceramic roller in heating furnace is not properly cleaned, resulting in the accumulation of dirt on it; glass explosion furnace, there is residual micro-glass slag on roller.

　　At the same time, coupled with the continuous advancement of frequency conversion technology, the performance requirements of tempering furnace are becoming higher and higher, which not only meets the needs of glass industry, but also has a certain frequency conversion function. Subduction according to the current situation, research and development of glass tempering furnace unit is very good to meet the current needs, together with the glass tempering furnace manufacturers to learn more about it! The subduction glass tempering furnace is suitable for ordinary flat glass, super white glass, screen printing glass, embossed glass, colored glass, on-line LOW-E glass, etc. It is mainly used in furniture glass, household appliances glass, interior decoration glass, building doors and windows glass, curtain wall glass. The performance characteristics are as follows:

(1) The glass tempering furnace adopts the production mode of combining flat steel with bending steel.

(2) By adopting computer arc-adjusting mode and accurate arc-adjusting mechanism, the consistency of glass is improved to a greater extent.

(3) 0.5 mm film can be used when bending steel glass is clamped, and there is no bubble phenomenon.

(4) PLD closed-loop control is adopted in the heating control mode of the furnace wire, and the heating system is intelligent and flexible.

(5) The heating control mode adopts multiple temperature control curves, which enables different glass sheets to enter a furnace at the same time and heat at the same time, so that the quality can be better.

(6) Intelligent protective measures are adopted in the heating mode of glass tempering furnace to avoid losing control of furnace temperature and scalding glass surface.

(7) The variable frequency fan is used for infinite speed regulation, so as to save electric energy to a great extent.

(8) Emergency DC protection system is adopted to avoid glass damage to quartz rollers after power failure.

(9) No. 100 orders can be stored in the control system of glass tempering furnace, and appropriate production process parameters can be adjusted at any time according to production conditions.

(10) Temperature control system of small tempering furnace adopts double protection of time and temperature, which can avoid the phenomenon of glass sticking quartz roller.

Glass tempering furnace adopts advanced automatic control technology, which is suitable for the production of 3-19 mm tempered glass. The products are used in the fields of building, private, aircraft, ship, locomotive, automobile, household appliances and solar energy. The main components of glass tempering furnace are upper stage, heating furnace, cooling section and lower stage, as well as high pressure centrifugal fan, air supply pipeline, electrical control cabinet, operating table, etc.

Glass tempering furnace has the following advantages: AC frequency conversion technology is used in the transmission of each part of the equipment, motor drive, reciprocating drive speed is adjustable; the operation of each part is automatically completed by the control system composed of industrial computer and PLC; the air pressure of the air supply system is automatically adjusted, the upper and lower wind grids are electrically opened, the air volume is electrically balanced, and the main air valve is automatically opened; the main transmission of upper and lower tables is chain drive with simple structure. The step length can be set automatically according to the size of glass. The reciprocating stroke and cycle of glass in heating furnace and wind grate section can be determined automatically according to the size of glass filling.