The following nine problems are common to our blow molding machine manufacturers and hollow blow molding machines. Let us analyze and hope that they will help us.
The first point: the eccentricity of the plastic bottle bottom, and the plastic preform temperature, stretching, pre-blowing, high-pressure blowing, etc. may be related.
The second point: when the bottom of the plastic bottle is white, it is usually due to excessive stretching, or the plastic preform is too cold, or the pre-blowing pressure is too high, or the pre-blowing is too early.
The third point: the partial whitishness of the plastic bottle is generally due to excessive stretching, or the whitish temperature is too low, or the stretching rod is encountered, or the pre-blowing is too early.
The fourth point: the case of thick upper and lower thinner, generally because the pre-blowing is too early, can reduce the pre-blowing pressure, or reduce the air flow, or delay the pre-blowing time.
The fifth point: the plastic bottle bottom has a magnifying glass phenomenon, generally because the pre-blowing is too late, or the pre-blowing pressure is too low, or the plastic bottle bottom material is too much.
Sixth point: The case of thick and thin is generally because the pre-blowing is too late, the pre-blowing pressure can be increased, or the gas flow can be increased, or the pre-blowing time can be advanced.
Seventh point: The turbidity of the entire plastic bottle is generally due to insufficient cooling.
Eighth point: There are wrinkles in the bottom of the plastic bottle, usually due to pre-blowing too late, or the flow is too small, or the pressure is too low, or the bottom temperature is too high.
The ninth point: When the plastic bottle neck is wrinkled, it is generally because the plastic preform at the plastic bottle neck is not well cooled, or the pre-blowing is too late, or the pre-blowing pressure is too low.