FAQ,News,ZHEJIANG TONVA PLASTICS MACHINE CO.,LTD

08
2019-08 Uneven transverse wall thickness of blow molding products
Parison extrusion skew ②The temperature difference between the mould sleeve and the mould core is large. ③The shape of the product is asymmetrical ④Th...
08
2019-08 Orange peel patterns or hemp spots appear on the surface of blow molding products
Poor exhaust of mould ②Leakage of mould or condensation of mold cavity ③Poor plasticity of parison④Insufficient blowing pressure ⑤Blowing speed is slo...
08
2019-08 Volume reduction of blow molding products
The wall thickness of parison is increases, which leads to the thickening of the wall of the product.②The shrinkage rate of the product is increased, ...

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