SINO PK could offer you best quality PET preform mould,our PET preform mould cooling system is well-designed and could help you reduce the cycle time efficiently.
The below picture shows the PET preform mould core side cooling system ,the water come in and out like the arrow shows.
The water come in from the center copper tube and spray down, in this way, the cavity side could be even cooled.

Below picture shows the cavity side cooling system:

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