... PET, PC, PV, PP bottle 5. full automatic the standard operation of GP-Y2L-4000 extrusion blow molding machine ... , preform is conveyed into the blow station, then close the mold, stretch and blow under low pressure and high pressure ... valve to make the air pressure diagram of the machine easier to understand. K. Low cost, high efficiency ... device Full auto small bottle extrusion blow moulding machine