Check out the 3-layer continuous extrusion blow moulding machine ECT 880 CoEx3 by ST BlowMoulding.

The continuous extrusion-blow moulding machines of the EC Series are the natural choice to produce multilayer items with high melt strength HDPE. In the ECT versions the parison is mechanically moved from the extrusion head into the mould.
ECT are top of the range in continuous extrusion-blow moulding machines for industrial applications: high production rate and unmatchable accuracy.

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ECT 880 CoEx3