negative vs positive pressure based V end 2 orizontal reversed double W fan Duct

negative end positive pressure based fan duct, a dispersive higt flow rate air direct to the extrusion convoyed to left, right end down, by a negative pressure, for hight retractive materials when is needed anyway the cooling or normal materials when is needed a glossy effect end dimensional precision, just going up a bit extrusion temperature (from my test 7-12*with fan to 60%)