Bi-metal single conical twin screw and barrel is a kind of barrel with a 2-2.5mm-thick alloy caot on the barrel inner wall which has the ability to resist abrasion,erosion and high-temperature.And its useful service life is greatly improved contrast to common nitrating barrel.Bimetal has more obvious advantages when processing PVC calcium powder high formulations and increase wear life。
The twin-screw bimetallic screw produced by our company uses a special alloy powder to spray weld the alloy on the screw flights. It can use different alloys and welding methods for different functions of the screw.
Bi-metal single conical twin screw and barrel is a kind of barrel with a 2-2.5mm-thick alloy caot on the barrel inner wall which has the ability to resist abrasion,erosion and high-temperature.And its useful service life is greatly improved contrast to common nitrating barrel.Bimetal has more obvious advantages when processing PVC calcium powder high formulations and increase wear life。
The twin-screw bimetallic screw produced by our company uses a special alloy powder to spray weld the alloy on the screw flights. It can use different alloys and welding methods for different functions of the screw.
Conical twin screw and barrel parameters：
| Screw specification(d/D) | Effective length(mm) | Extrusion ability(Kg/h) | Screw speed(rpm) |
| Φ35/Φ77 | 810 | 40-70 | 5~50 |
| Φ45/Φ90 | 990 | 50-80 | 5~45 |
| Φ50/Φ105 | 1070 | 100-150 | 4~45 |
| Φ51/Φ105 | 1220 | 100-150 | 4~45 |
| Φ55/Φ110 | 1220 | 120-180 | 4~40 |
| Φ60/Φ125 | 1320 | 150-200 | 4~40 |
| Φ65/Φ120 | 1440 | 200-250 | 4~40 |
| Φ65/Φ132 | 1440 | 200-250 | 4~40 |
| Φ70/Φ140 | 1460 | 220-300 | 4~40 |
| Φ75/Φ150 | 1480 | 250-320 | 4~35 |
| Φ80/Φ143 | 1800 | 300-360 | 4~35 |
| Φ80/Φ156 | 1660 | 300-360 | 4~35 |
| Φ92/Φ188 | 2000 | 400-500 | 4~35 |
