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Blow Molding Machine To Produce Range From 200L To 20000L Storage Water Tank

Blow Molding Machine To Produce Range From 200L To 20000L Storage Water Tank

The keys points of blow molding process control: 1) for extrusion blow molding of the blow molding machine used to produce range from 200L to 20000L storage water tank Pay attention to the control of parison sag and wrinkle defects. If the length is too long, the wall thickness will decrease and the residual material will also increase. If the vertical extension is not enough and the parison is too short, it will not be able to expand.

Blow molding machine used to produce range from 200L to 20000L storage water tank

Blow molding machine used to produce range from 200L to 20000L storage water tank.jpg

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The keys points of blow molding process control:

1) for extrusion blow molding of the blow molding machine used to produce range from 200L to 20000L storage water tank

Pay attention to the control of parison sag and wrinkle defects. If the length is too long, the wall thickness will decrease and the residual material will also increase. If the vertical extension is not enough and the parison is too short, it will not be able to expand.

2) wrinkle phenomenon

When the shape of the billet is reduced to a certain length, the upper melt can not bear the circumferential stress caused by the self weight of the billet. Generally, the high melt strength, the small expansion of the diameter of the billet, the high extrusion rate and the large gap of the die mouth help to improve the wrinkle.

3) uneven wall thickness

Another problem is that when the parison is falling, the wall thickness is uneven. Usually, there are six side nuts on the die of the die, which can be used to adjust the gap between the mandrel and the die.

4) do a good job of exhausting

In order to get a good surface quality, we must pay attention to the exhaust, such as the sand blasting on the surface of the mold, the granularity less than 180#, and the blow molding of the hard plastic, the exhaust hole, the exhaust needle and the exhaust tank. In addition, it is also helpful to improve the bulging pressure to improve the appearance of the products.

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