一、炉温加热曲线不对，温度过高或者过低都会导致喷塑层变色The heating temperature curve is wrong, temperature is too high or too low will cause discoloration of spray layer.
二、固化炉局部温度过高或者过低导致喷塑层变色，比如说靠近加热炉出风口的位置温度，容易导致局部变色Curing oven temperature is too high or too low and cause the local spray layer color, such as near the furnace outlet position of the highest temperature, easily lead to local color.
三、加热炉内热输送管道破裂也会导致后面的炉温过低从而使得喷塑层变色The temperature is too low will lead back so that the spray layer heating furnace heat discoloration of pipeline rupture.
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