Nozzle temperature of hot channels of the mold and the temperature difference very much, therefore, the thermal expansion must be included in the design of the Manifold and Nozzle plate in cold conditions. If thermal expansion calculations are incorrect, hot channel system or the mold will be destroyed or caused the leak.
Of which:
LD Nozzle length (mm)
Nozzle length at LF expansion (mm)
α the coefficient of thermal expansion of the material (1 / ° C)
temperature TR plastic dividers (° C)
temperature TF mold (° C)?
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