Uneven transverse wall thickness of blow molding products


Cause of occurrence:

①Parison extrusion skew 

②The temperature difference between the mould sleeve and the mould core is large. 

③The shape of the product is asymmetrical 

④The blow molding ratio of the Parison is too large.

Solution measures:

①Adjust the deviation of the gap width of the die so that the thickness of the blank wall is uniform. 

②Lifting or lowering the heating temperature of the mould sleeve, and improving the internal and external temperature deviation of the mould 

③The parison is pre-clamped and pre-expanded before the mold is closed so that the parison is suitably offset in the thin-wall direction 

④Reduce the blow molding ratio of parison

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