Injection Molding
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Unstable mold temperature control in low density polyethylene '2079851475616104452
Problembeschreibung
Mold temperature fluctuates greatly during production, with obvious temperature differences between cavities.
Unstable mold temperature causes dimensional fluctuation, warpage deformation, and inconsistent appearance of products, affecting product quality and production efficiency.
Ursachenanalyse
(1) Insufficient mold temperature controller power or inadequate water channel flow
(2) Unreasonable mold cooling water channel design, uneven cooling in various parts
(3) Poor cooling water quality; scaling and blockage in water channels reduce flow
(4) Ambient temperature changes affect mold temperature control accuracy
(5) Improper cooling time setting; mold temperature has not reached equilibrium
Lösung
(1) Select a mold temperature controller with sufficient power, ensure mold temperature stable within the 30-60°C range
(2) Optimize mold cooling water channels, ensure uniform cooling of each cavity, arrange pipelines symmetrically
(3) Regularly clean cooling water channels, use soft water or add anti-scaling agent
(4) Install air conditioning in the production environment, control room temperature at 20-25°C
(5) Fully preheat the mold after startup; start formal production after 10-20 shots
Wichtigste Erkenntnis
Unstable mold temperature is caused by improper cooling system design or maintenance; it needs to be solved from the mold temperature controller, water channel design, and maintenance.
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