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A combination of Cold Runner Blocks that permit the injection of 2 different kinds of compounds, when moulding rubber to metal bonded parts. The Bi-Cold Runner Block (16 nozzles plus 8 nozzles), each having their own independent temperature control unit, kept constant till the tip of the nozzle. The separation between the Cold Runner Blocks is via titanium spacers, which permit also the passage of air, thus functioning as an insulator. The “quick release system” has been applied to allow a fast removal of the heating plate from the Cold Runner Block, thus avoiding transfer of heat to the nozzles.