中空玻璃设备预压排气需要操作什么？

（1）辊压排气法：
(1) the rolling and exhaust method:
合好的玻璃经过预热进入辊压机，经中空玻璃设备道辊挤压后，进入恒温箱，再经第二道辊挤压，排气、封边完成此过程。出第二道辊后，夹层玻璃四周应呈现一整圈透明带将边部封好，避免高压釜内气体回流产生汽泡。其它部位可以有分布均匀的不透明部分存在。此工艺要求玻璃表面温度必须严格控制，既不可温度太高，使封边过早，内部气体无法排出；又不可温度太低，封边不完全，产生回流汽泡。
The closed glass enters the roller press through preheating. After the first roll of the hollow glass equipment, it is squeezed into the thermostat and then squeezed through second rolls, and the process is completed by the exhaust and the edge. After second rolls, the whole glass should be surrounded by a transparent belt to seal the edges so as to avoid the backflow of bubbles in the autoclave. Other parts can be distributed evenly and opaque. This process requires that the glass surface temperature must be strictly controlled, not too high temperature, so that the sealing edge is too early, the internal gas can not be discharged; and the temperature is not too low, the sealing edge is not complete, producing reflux bubble.
合好的玻璃预热后表面温度<span>20－25℃左右，中空玻璃设备道胶辊间隙应比夹层玻璃总厚度小1MM左右，压力为0.2–0.5MPA左右。第二道胶辊间隙应比夹层玻璃总厚度小2MM左右，压力为0.4–0.6MPA左右。

The surface temperature of the combined glass is about <span>20 - 25, and the gap between the first roll of the hollow glass equipment should be about 1MM smaller than the total thickness of the laminated glass, and the pressure is 0.2&ndash and 0.5MPA. The gap between the second cots should be about 2MM smaller than the total thickness of the sandwich glass, and the pressure is 0.4&ndash and 0.6MPA.

入第二道辊时玻璃表面温度一定要严格控制在60―80℃左右。生产时首先准备好所需加工的玻璃制品，尽可能连续、不间断地进行生产，避免因间隔时间长，恒温箱温度变化过剧，造成玻璃表面温度无法准确控制。
When entering second rolls, the surface temperature of glass must be strictly controlled at 60 to 80 degrees Celsius. The production of glass products needed to be processed is first prepared in production, as long as possible, continuous and continuous production, avoiding long interval and temperature change of the thermostat, which can not control the temperature of the glass surface accurately.
辊压排气法的优点：可连续生产，产量高，节约能源。
The advantages of rolling exhaust method are continuous production, high yield and energy saving.
（2）真空减压排气法
(2) vacuum decompression exhaust method
将合片好的玻璃放入真空袋内或四周套上真空胶圈，加热至<span>80-100摄氏度，经冷抽、热抽，利用压差将玻璃／PVB中间膜界面中的空气排出并封边。如果温度、真空度、时间不够，由于排气不够及玻璃与胶片贴合不够紧密，易造成气泡，或易在煮沸实验时起泡。
Put the good glass into the vacuum bag or around the vacuum ring, heat to <span>80-100 degrees Celsius, cold pumping, hot pumping, the use of pressure difference in glass / PVB middle film interface air discharge and sealing edge. If the temperature, vacuum and time are not enough, because the exhaust is not enough and the glass is not tight enough with the film, it is easy to cause bubbles or easy to froth in boiling experiments.
中空玻璃设备小编建议：减压真空度为650MMHG以上，冷抽温度为25℃左右，冷抽时间20分钟以上；热抽时玻璃表面温度需达到70―120℃，时间在40分钟以上。
It is suggested that the vacuum vacuum degree is above 650MMHG, the cold pumping temperature is about 25 C, and the cold pumping time is more than 20 minutes. The temperature of glass surface should be 70 to 120 C when hot pumping, and the time is more than 40 minutes.
采用真空减压排气法生产具有复杂轮廓的玻璃，质量较好，但这种小批量生产方法需要手工操作。
The vacuum relief exhaust method is used to produce glass with complicated profile. The quality is better, but this small batch production method needs manual operation.