| Tempered glass problem analysis and solving common quality |
| Date：2013-11-18 Author：zhaoyang Hits：1305 |
| The appearance quality glass has many manifestations , we follow it appears in different stages of the production process , will be divided into two broad categories: ① the original quality defects caused by the glass sheet appearance quality problems, such as : point-like defect ( bubbles , inclusions ) , scratches, optical distortion , etc. ; ② steel process caused by the appearance of quality problems , such as: glass flatness problem ( wave pattern , goodness of fit , the board surface deformation ) , optical aspects ( central gray, stress spots too heavy, iridescent phenomenon ) , white Road , scratches , pitting and so on. The most common are: point-like defects ( bubbles , inclusions ) , scratches, and other optical distortion . Bubbles, inclusions and optical distortion inherent flaws of the original plate , scratches in the original piece of glass formed during the production and handling of . If the original film to reach the appropriate standards , not only will Tempered glass quality in appearance to reach " glass " national standards, but also greatly increase the fryer tempered glass , uneven distribution of stress , blew , mechanical strength , thermal stability and poor performance of various safety risks , resulting steel Furnace shutdown, clean oven , making the product yield and productivity decline , rising production costs , resulting in unnecessary waste. Tempered glass producers even by adjusting the steel furnace process parameters can not avoid the occurrence of such quality problems , the business only through strictly controlled production management system, strengthen training for employees , the operator proficiency test content and the corresponding test methods, the original glass rigorous screening , to avoid the problem of the original glass inflow reprocessing stage . Class 1 , curved tempered glass flatness bad problem . Such problems are usually considered on its goodness of fit index , finished appearance when curved tempered glass fit degrees less than the design requirements, mainly the following three phenomena occur : Finished glass and design requirements appear distorted bias. This shows the need for glass bending steel rollers location is not placed correctly , the glass bending roller is not parallel to the center line , if this is the case , the operator needs to adjust the position of the stage glass, the topsheet , the glass the center line of the bending roller are parallel . Finished glass and curved designs with varying depths . This shows that the steel process parameter setting problem : In the heating phase , the heating temperature of the glass is not enough ; during the cooling phase, the main gate of the wind and the lower air outlet when the hair is not synchronized, the hair is a first open hair , a hair- opened after . If the hair to open the air outlet , the molded depth of the glass bending will increase, on the contrary , to open the air outlet on the hair , after forming a curved glass depth is reduced, the arc according to a design depth . At this point the operator can re-adjust the process parameters , appropriate adjustments to the glass bending depth. The operator can adjust the heating time and the quench section of the bending time , or the curved section of the drive chain tension level , through the steel to adjust process parameters or the equipment to solve such problems . |
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