Needle Shutoff Nozzle
Needle shutoff nozzles use an actuated needle to seal the melt channel, providing precise melt control and preventing drooling, stringing or leakage. They are applicable for foaming plastics and can be combined with a filter or static mixer to add further function, helping reduce injection cycle time.
Technical data
| PARAMETER | UNIT | RN-I | RN-II | RN-III |
|---|---|---|---|---|
| Max. Shot Weight (Ref.) | gram | 700 | 6000 | 30000 |
| Max. Screw Size (Ref.) | mm | Φ60 | Φ120 | Φ240 |
| Max. Machine Size (Ref.) | tonnage | 300 | 1200 | 3000 |
| Body Length (L1) | mm | 140 | 178 | 246 |
| Tip Length (L3) | mm | 20/65/85/100 | 30/60/90/120 | 48/98/128 |
| Body Diameter (G) | mm | Φ60 | Φ80 | Φ115 |
| Air Pressure (Ref.) | Bar | 6 | 8 | 10 |
| Hydraulic Pressure (Ref.) | Bar | 30 | 40 | 50 |
| Max. Inj. Pressure (Ref.) | Bar | 3000 | 3000 | 3000 |
| Max. Temperature | °C | 400 | 400 | 400 |
Engineering highlights
- Prevent drooling, stringing or leakage
- Applicable for foaming plastic (chemical or physical)
- Reduced injection cycle time
- Combine use with filter or static mixer to achieve more function
PRODUCT VIDEO
Frequently Asked Questions
A needle shutoff nozzle controls the flow of molten plastic with a needle mechanism. It is designed to provide positive shutoff and help prevent melt from continuing to flow from the nozzle after injection.
Controlled nozzle shutoff can help improve process consistency, reduce drooling, and provide more stable melt flow during repeated injection cycles.
Yes. The pneumatic or hydraulic actuation system can precisely control the sealing of flow channel and achieve screw parallel charge and also micro-foaming situation.
Important factors include machine nozzle connection, injection unit dimensions, material characteristics, injection pressure, temperature, and required flow capacity.
Yes. ROOTIER can manufacture customized needle shutoff nozzles according to machine drawings, dimensions, connection standards, and application requirements.