Description of Screw Elements
The screw elements within the plastic pelletizing machine are crucial for the plastic processing procedure. Selecting the appropriate type and material of screw elements ensures efficient and stable operation of the machine, resulting in the production of high-quality plastic pellets.
Classification of screw elements
1.Conveyor blocks
2.Cut blocks/meshing blocks
3.Special elements (TME, ZME, SK and others)
The main parameters of the screw element - lead/pitch
1.Wide pitch elements are typically used in the inlet and outlet sections of extruders.
2.Narrow pitch elements are employed where material compression or complete filling with filler is necessary.
3.Increasing the pitch reduces residence time and filling degree, narrows residence time distribution, increases drag flow, and enhances pressure sensitivity. It also accelerates the speed at which the material is conveyed by the towed stream. However, wide pitch elements are less effective in generating the pressure needed to overcome flow channel constraints. Nevertheless, within normal pressure ranges, their pumping capacity exceeds that of narrow pitch elements.
4.Reverse screw elements generate back pressure to ensure complete filling with 100% material.
The material of the threaded element
38 CrMoAl
| Model | L/D | Screw national standard diameter |
| H-20B | 28~60 :1 | 21.7mm |
| H-35B | 28~60 :1 | 35.6mm |
| H-50B | 28~60 :1 | 51mm |
| H-65B | 28~60 :1 | 62.4mm |
| H-75B | 28~60 :1 | 71.5mm |
FAQ
1:How many years of experience do you have?
Over 15 years experience in extruder industry.
2:Are you traders or manufacturers?What is the area of the factory?
We are manufacturer,The factory is over 5000 square meters.
3:Screw and barrel accessories, who is produced?
Our factory manufactures it ourselves
4:Can I have a sample order for extruder?
Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.
5:How to proceed an order for ?
Firstly ,let us know your requirements or application.
Secondly ,We quote according to your requirements or our suggestions.
Thirdly ,customer confirms the samples and places deposit for formal order.
Fourthly, We arrange the production.
Finally, arrange delivery
6: Provide technology and formula?
For orders over a certain amount, we will provide the technology and formula to help you complete the project.
7: Have a catalogue?
HLD Album.pdf
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