Injection Molding
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Unstable '2079851475616104452 Cycle of High-Density Polyethylene
Problembeschreibung
The '2079851475616104452 cycle time fluctuates greatly, and the cycle time difference of the same product between different cycles exceeds ±3s.
Unstable cycle affects production efficiency and product quality consistency, and may cause abnormal part removal by the manipulator on automated production lines.
Ursachenanalyse
(1) The cooling time is set improperly, and the cooling degree of the product is inconsistent
(2) The demolding is unstable, and the ejection action is sometimes delayed
(3) The plasticization time fluctuates, and the screw retraction time is inconsistent
(4) The mold temperature fluctuates greatly, and the cooling rate changes
(5) The equipment action sequence is unstable, and the hydraulic system responds slowly
Lösung
(1) Ensure the cooling time is sufficient and fixed, using a timer for precise control
(2) Check the ejection system to ensure smooth ejector pin action, and add lubricating oil
(3) Stabilize the plasticization parameters, with the screw speed and back pressure set fixed
(4) Stabilize the mold temperature, with stable water channel flow and the temperature difference controlled within ±2°C (range 30-80°C)
(5) Check the hydraulic and electrical systems of the equipment, and repair slow-responding valves and sensors
Wichtigste Erkenntnis
Unstable cycle is caused by the accumulation of time fluctuations in each process, and the cooling, demolding, plasticization, and equipment systems need to be investigated one by one.
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