Spring Shut Off Nozzle

Spring shut off nozzle is mainly used to prevent leakage of high flow plastics such as nylons. The nozzle is opened by injection pressure of melt polymers and closed by internal spring force after pressure holding procedure. Furthermore, it can also shorten cycle time.

Application

  • Prevent leakage
  • Shorten cycle time
  • Combination with filter or color mixing

Polymers

PA6, PA66, PE, PP, PS, ABS, PET, etc. (Not applicable for PVC and PC)

Spring Shut Off Nozzle

Parameters Unit SN-1 SN-2 SN-3
Max. Injection Rate cm3/s 300 500 1500
Max. Screw Diameter mm 40 70 120
Max. Machine Tonnage Ton 200 400 1200
Body Length (B) mm 91 123 135
Heater (H) mm Φ45×40L Φ47×60L Φ60×70L
Max. Orifice Diameter mm 3 5 8
Open Pressure Bar 280
Close Pressure Bar 100
Max. Injection Pressure Bar 2500
Max. Temperature ºC 380

 

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