What causes slow material storage in blow molding machines?

Based on experience, Ningbo Kinggle Machinery blow molding machine manufacturers have summarized that the core reasons for slow material storage in blow molding machines can be classified into the following four categories. These need to be investigated in combination with the type of equipment and operating status:

I. Abnormal temperature control

If the heating temperature of the screw or barrel does not meet the requirements for material melting, the plastic cannot be softened, resulting in an increase in the resistance of the screw's advancement and a significant decrease in the storage speed.

If the temperature at the discharge port is too high, it may cause local adhesion or blockage of the material, hindering the normal discharge process and indirectly affecting the storage efficiency.

II. Wear or performance issues of mechanical components

After long-term use, the gap between the screw and the barrel becomes larger, resulting in a decrease in plasticizing efficiency and a decline in material conveying capacity, which is manifested as an extended storage time.

In addition, if the servo valve is subject to electromagnetic interference (such as interference from frequency converters), it will cause unstable pressure output and affect the storage speed of materials.

III. Control System Failure

When the electronic ruler is contaminated or malfunctions, it will give back incorrect signals, causing the control system to be unable to adjust the storage volume and resulting in speed fluctuations.

If the control program is abnormal or the sensor signal is distorted, the storage process may be interrupted.

IV. Auxiliary System Issues

If the cold water flow is insufficient or the temperature is too high during the storage process, it may cause the hydraulic oil temperature to rise, indirectly affecting the response speed of the hydraulic system.

The Ningbo Kinggle Machinery blow molding machine manufacturer suggests the inspection sequence:

Check whether the temperature setting matches the actual value;

Detect the signal stability of the electronic ruler and the working status of the servo valve;

Conduct an assessment of the degree of screw wear;

Verify the water pressure and flow parameters of the system;