How to analyze and solve the quality problems of blow molding hollow products?

Today, let's talk about how to analyze and find out the quality problems and solutions of blow molded hollow products about the injection blow molding machine. Let's have a look!
First, the parison structure size is incomplete.
Inappropriate flux injection shall increase the amount of flux injection; The mold filling capacity of inappropriate flux injection and inappropriate flux injection shall increase the mold filling pressure of the flux injection; The proper plasticizing temperature of raw materials and inappropriate flux flow speed should increase the heating temperature of the injection blow hollow molding machine barrel; When the temperature of the parison forming die is low or uneven, the temperature of the die should be increased appropriately to make the temperature of all parts of the die consistent, so as to adjust the assembly position of the die parts.
Injection blow hollow molding machine
Second, there is flash in die blank forming.
If the injection amount of molten material is too large, the amount shall be appropriately reduced. When the injection pressure is high, it should be adjusted to reduce the injection pressure; Adjust when the injection molding quality is poor. If the barrel temperature is too high, the barrel heating temperature should be appropriately reduced.
Third, the parison thickness is uneven.
The installation position of the shaft core is incorrect and needs to be adjusted. When the material temperature is uneven or low, the screw back pressure or the heating temperature of the injection blow hollow forming barrel shall be increased. The mandrel is deformed and needs to be repaired and replaced. If the injection pressure is too high, the injection pressure of the melt should be appropriately reduced.
Fourth, the appearance quality of parison is poor.
There are many sundries inside the raw materials, and the appearance of the parison is irregular, so the raw materials should be replaced and pure materials should be selected; The injection melting temperature is low, and the parison appearance is not bright, so the heating temperature of the injection blow hollow molding machine barrel should be increased.