Problem 1: The condition of thick on the top and thin on the bottom needs to delay the pre-blowing time, or reduce the pre-blowing pressure to reduce the gas flow.
Problem 2: The situation of thick at the bottom and thin at the top is opposite to the problem that has been solved.
Problem 3: There will be wrinkles under the bottleneck, pre-blowing too late or the pre-blowing pressure is too low, or the blank is not cooled well here.
Problem 4: The bottom is white, the main reason is that the bottle is too cold; And at the same time overstretch; Pre-blowing time is too early or pre-blowing pressure is too high.
Problem 5: There is a magnifying glass phenomenon at the bottom of the bottle, too much material at the bottom of the bottle; Preblow too late, preblow pressure is too low.
Problem 6: There are wrinkles inside the bottom of the bottle, and the bottom temperature is too high (the gate is not cooled well); The pre-blowing pressure is too low and the flow rate is too small.
Problem 7: The whole bottle looks cloudy with low transparency and insufficient cooling.
Problem eight: Local white: excessive stretching, where the temperature is too low, or pre-blowing too early, or touching the tensile rod.
Problem 9: The eccentric condition of the bottom of the PET plastic bottle may be related to the temperature of the bottle, stretching, pre-blowing, high pressure blowing, etc. The solution is to first reduce the temperature of the billet; At the same time to speed up the drawing speed; Check the gap between the rod head and the bottom die; Delay the pre-blowing and reduce the pre-blowing pressure; Delay high pressure blowing; After processing, check whether the preform will still appear eccentric.