Material Drying
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Cooling water channel clogging of random copolymer polypropylene injection mold
Fenómeno del problema
Mold cooling effect declines, cooling time is extended, and product demolding temperature rises.
Cooling water channel clogging causes poor local cooling, with warpage, shrinkage cavities and other defects appearing in products, and production efficiency decreases.
Análisis de la causa
(1) Poor cooling water quality; scale gradually builds up and clogs the inner walls of water channels
(2) Unreasonable water channel design, with dead zones where impurities easily deposit
(3) Long-term lack of cleaning and maintenance, with rust or corrosion inside the water channels
(4) Coolant temperature too low causes condensation, and moisture mixes into the water channels
(5) Water channel joints leak, and air enters forming air locks
Solución
(1) Regularly clean cooling water channels, descaling with chemical cleaning agents every 3-6 months
(2) Use soft water or pure water as the cooling medium, adding preservatives
(3) Optimize water channel design, avoiding dead zones and too-small channel diameters (≥8mm)
(4) Control coolant temperature 2-3°C above room temperature to prevent condensation
(5) Check water channel joint seals to ensure no leakage or air locks
Conclusión clave
Water channel clogging is caused by poor water quality and insufficient maintenance; water channels need regular cleaning and cooling water quality improvement.
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