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Reasons And Countermeasures For Low Level Of Tempered Glass
Jul 04, 2017

Reasons and countermeasures for low level of Tempered Glass

The flatness and thickness of toughened glass when used on the one hand, a deformation of the reflection of optical glass, optical distortion will also attack on the other hand, when used for sandwich glass composition after the close of laminated glass thickness, the deformation of the optical, further influence the visual effect of goods, part of the laminated glass thinning can also affect the bonding properties of goods; If toughened glass sinuosity owe good, application Yu Zhongkong glass, knead in kneading going to constitute different Ding Jiao inequality, affect the appearance quality, also affect the sealing quality, and may constitute a part of the super thick, further affect the device. So it is very important to control the flatness of the Tempered Glass.

The factors of the steel glass are analyzed

The deformation of toughened glass mainly comes from the aspect of li; The first is the accuracy of the rollers, and the second is the unevenness of stress.

The steel glass with the problem of the roller is not good

1.1.1 heating roller deformation

The general level of the roller table glass tempering furnace, roller is made of fused quartz or ceramic materials, it has good thermal shock and thermal stability, but because sometimes its internal structural nonuniformity may cause thermal deformation under the high temperature heating especially attack. Tempered Glass The heat deformation of the rollers must lead to the twists and turns of the rollers, and also the deformation of the glass in the movement of the roller.

1.1.2 the roller is worn

Table after a long time to apply and repetitive, must cause the roller wear, especially on the sorting table of adhesive compare the solid impurities, generally use grinding method for finishing, long time of use and frequently cause of roller grinding uneven, on the one hand, on the same table appear uneven thickness or offset, on the other hand between roller and roller sometimes because not replacement are used together, the uneven thickness of old and new roller or degree of wear of roller roller use will cause uneven thickness. The emergence of the above results will be the roller run appearance, on the uneven glass in this table are heated to softening temperature and transmission in the uneven roller, softening of the glass will appear deformation, the deformation reserves to glass is enhanced in the future will make toughened glass attacks after deformation.

1.1.3 Tempered Glass deformation of wind grate roller

Glass agile is passed to the grid wind after heating furnace heating roller table, glass at the moment is still in the softening condition, if the wind gate roller deformation will affect the smoothness of the glass, and the easiest to make the wind gate roller deformation factors mainly has two kinds: one is the transmission roller twists and turns, the second is table appearance of insulation material is incomplete.

The heat distortion caused by the uneven heating temperature

1.2.1 Tempered Glass appearances are up and down when heated temperature when the glass is passed on to the heating roller, roller under the glass appearance and touch, heating roller directly in the form of conduction heat exchange with glass, glass appearance is through thermal radiation on the heating of the glass on the appearance, the appearance of the heat transfer rate is higher than the appearance of the heat transfer rate, when does not accept when heated, the heat balance for the glass appearance under the temperature lower than the temperature on the appearance, and in the beginning when heated glass is typical of elastomer, glass thermal coefficient and high contrast (line swell coefficient of the glass is 9 x 10 /. C), because of the external temperature is higher than the temperature on the appearance, the appearance of the swell rate is higher than the appearance, the twists and turns up the glass surrounding up from the table, constitute the glass was heated and only center supported by roller, when the glass is touch with roller bearing first arrived in continuous heating softening temperature and accept all of the glass component, the center of the glass will "flow" deformation, ask thinning resulting in part of roller marks or even optical deformation, on the other hand, when the glass was heated to softening temperature all Tempered Glass after flattening, but the difference in temperature did not see, this glass is uniform cooling to room temperature with temperature difference on the surface of the glass when hot shorten the shorten of big ice face, constitute to heat the twists and turns.