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Common faults of plastic extrusion blow molding machine

Views: 16     Author: Huan Machinery     Publish Time: 2021-04-20      Origin: Huan Machinery

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Common faults of plastic extrusion blow molding machine

1. The discharge of the extrusion blow molding machine is unstable

There are many reasons for the instability of the discharge of the hollow extrusion blow molding machine. It may be that the temperature when starting up is low and cannot meet the standard; the temperature of the extrusion barrel or die is unstable; the screw is stuck with rubber; the back pressure is too high. Low; the filter is clogged. To solve this problem, check these components and make appropriate adjustments.


2.Uneven distribution of product wall thickness

The uneven distribution of the wall thickness of the product is an uncommon problem. The cause of this failure is generally related to the cooling and processing time. When the temperature and heating temperature are uneven, insufficient cooling will affect the wall thickness distribution of extrusion blow molding products, and the hollow needs to be adjusted. Blow molding machine tube wall control technology to alleviate the frequency of failure.


3.Unable to feed the material

Failure to feed may be that the battery is under load, which will affect the feeding of the equipment. If it is serious, it will affect the hollow blow molding machine to fail to produce products normally.


There are so many common failures of the hollow blow molding machine, so in the daily use process, pay attention to the following 4 points

1. In order to reduce the weight sag of the parison, speed up the extrusion rate of the parison and reduce the waiting time of the mold under allowable conditions;

2. In the production process, try to shorten the molding cycle as much as possible on the premise of ensuring that the product is fully cooled;

3. In operation, the inflation pressure must be satisfied, and the blowing rate must be fast;

4. Control the temperature and speed of the extruder, this is to ensure the quality of the preform and the quality of the product;


If you want to know more about our extrusion blow molding machine,please feel free to contact us.





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