What are the factors that affect the thickness of silicon dioxide films?
The die temperature distribution is not uniform, high and low, so that the film thickness of the uneven blow;
The speed of traction is not constant and changes constantly, which of course affects the thickness of the film.
It is difficult to control the film thickness because of the unsuitable expansion ratio and traction ratio;
The air supply is not uniform around the cooling air ring, resulting in uneven cooling effect, so that the thickness of the film is uneven;
The uniformity of the die gap directly influences the uniformity of film thickness, if the die gap is not uniform, some parts of the large gap, some parts of the gap is small, resulting in output more or less, therefore, the thickness of the film formed is not consistent, some parts of thin and thick parts of some;
