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
