Wholesale Screw And Barrel For Plastic Twin Screw Extruder Machine
1. Descriptions
Different types of screw elements can be used in a twin screw exturder.Generally here are four major types of screw elements,kneading elements,backward-pumping elements and mixing elements.For each type here are many different kinds.
100% internal spline is checked with a spline plug gauge to ensure the interchangeability of components.
All of our twin screw extruder elements are finished by CNC grinding after heat treatment. The surface roughness of this series is less than Ra0.8, which completely eliminates the influence of heat treatment deformation on the quality of components.
2 .Twin screw extruder screw element parameter:
|
Model |
Screw Major Diameter (D/mm) | Screw Minor Diameter (d/mm) | D/d | Center distance(mm) |
| BM-20 | 21.7 | 14 | 1.55 | 18 |
| BM-25 | 25 | 16.1 | 1.55 | 21.2 |
| BM-35 | 35.6 | 23.6 | 1.51 | 30 |
| BM-50 | 50.5 | 32.5 | 1.55 | 42 |
| BM-52 | 51.4 | 33.8 | 1.52 | 43 |
| BM-60 | 59.6 | 43.8 | 1.37 | 52 |
| BM-65 | 62.4 | 40.5 | 1.54 | 52 |
| BM-68 | 69 | 49 | 1.40 | 60 |
| BM-70 | 70.6 | 47.4 | 1.49 | 60 |
| BM-75 | 71 | 47 | 1.51 | 60 |
3. Screw elements
The geometry of the conveying elements enables a good transport of the product through the extruder. Each conveying element is characterized by its number of flights, its length in millimeters, and its pitch. The pitch is defined as the axial length in millimeters, required for a complete thread. Conveying elements with a large pitch have a greater conveying effect than those with a small pitch. These elements are used to forward the material e.g. at feed openings, in order to avoid that pressure increases excessively at the openings.
4 . Pictures:
