High-pressure Molding of PVB Interlayer Film to Make Laminated Glass

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High-pressure Molding of PVB Interlayer Film to Make Laminated Glass The Pre-laminated glass have went through the Preheating and Exhausting Air procedure, but the whole pre-laminated glass still have air inside the laminated glass. In order to finally melt the PVB Interlayer film and exhausting all the air out, the pre-laminated glass should be put into the higher pressure laminating autoclave.  There are three steps:

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CNCGLASS PVB FILM

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High-pressure Molding of PVB Interlayer Film to Make Laminated Glass Heating  Put the pre-laminated glass vertically on the bracket, make sure the space between the two pre-laminated glass is equal, so each pre-laminated glass will get the same pressure. Make sure the pre-laminated glass not touch the metal part of the machine, to prevent the part of pre-laminated glass get too high temperature and break out. Close the autoclave and start heating. After the temperature rises up to 50 degree. Increase the pressure inside the autoclave. It's suggested that the speed of increasing pressure and temperature is :0.06MPA/MIN and 5 degree/min. If the temperature and pressure is not synchronous, please adust the machine. If temperature is too fast, then stop increasing the temperature until the pressure catch up, vice verse . 

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High-pressure Molding of PVB Interlayer Film to Make Laminated Glass Maintaining Pressure Stage: The temperature and pressure are very important parameters for making  laminated glass successfully. When the temperature and pressure reach to the setted point (like 120-140 degrees), pay attention to these two parameters carefully. If the temperature is lower than  130 degree, the pressure time should be  longer.But if the temperature is lower than 120 degree, it's not helpful to keep the pressure time longer. And the laminated glass may be not adhesive or not very strong. If the pressure is less than 1.2-1.4MPA, the time for pressure should be longer, but at the same time, the temperature should be 120-140 degrees. If the temperature is higher than 160 degree, the PVB interlayer film will turn yellow. And the laminated glass is failure. 

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High-pressure Molding of PVB Interlayer Film to Make Laminated Glass Cooling with pressure stage After the maintaining pressure stage, it's time to cooling the laminated glass. Still maintain the pressure and open the cooling water to reduce the temperature. When the temperature reaches 45 degree, start to reduce the pressure. When open the autoclave door, check the temperature of the laminated glass up and down, make sure the temperature of the laminated glass is even. Don't reduce the pressure too early, otherwise the bubbles would appear on the edges of the laminated glass. 

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CNCGLASS PVB FILM

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CNCGLASS PVB FILM All rights reserved by CNC GLASS INTERLAYER TECH WWW.CNCGLASS.COM CNC@CNCGLASS.COM BENEXT77@GMAIL.COM 008615013829504 Skype: CNEXT365 Wechat: WECAN365 Line: CNCGLASS EVA film for laminated glass, PVB film, PDLC smart galss film, Glass hardware,

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CNCGLASS PVB FILM

Summary: High-pressure Molding of PVB Interlayer Film to Make Laminated Glass

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