What machines are used to manufacture extruder screws for 3D printers?

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SUMMARY

This discussion focuses on the manufacturing processes and machines used to create extruder screws for 3D printers. Key machines mentioned include axial NC grinders and modified 4-axis engravers, which can be adapted for specific screw designs. The conversation emphasizes the complexity of extruder screws, which typically feature multiple sections with varying diameters and pitches. Participants suggest researching CNC machining techniques and benchmarking existing manufacturing methods to inform the design of a modular machine tool for lathe integration.

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  • Understanding of CNC machining principles
  • Familiarity with lathe operations and modifications
  • Knowledge of screw design specifications, including OD, ID, and pitch
  • Experience with tool post grinders and milling tools
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  • Research "CNC machining techniques for screw manufacturing"
  • Explore "Axial NC grinder specifications and applications"
  • Investigate "4-axis CNC engraver modifications for screw production"
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Engineers, machinists, and students involved in mechanical design, particularly those focused on 3D printing technology and screw manufacturing processes.

Tung Jian Seng
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Currently I am working on an assignment about making an extruder screw for screw based 3D printer. I am confused that actually what kind of machines those manufactures out there using to manufacture this kind of extruder screws ?
 
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Welcome to PhysicsForums. :smile:

A Google Images search on extruder screw design gives lots of good hits. Here is one:



1613849829478.png
 
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berkeman said:
Welcome to PhysicsForums. :smile:

A Google Images search on extruder screw design gives lots of good hits. Here is one:



View attachment 278388

Thanks a lot ! But I have a doubt... wondering how actually this kind of screw is made by those manufacturers and what kind of machines they using.
 
How are regular steel screws made? I suppose since the threads on the extruders are farther apart with flat surfaces between them (the shaft body), you would use a milling tool that moves along removing material down the length of the shaft. Have you tried using Google or Google Images with good search terms to find examples of various screw manufacturing processes? Google-fu is an important skill to develop... :smile:
 
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berkeman said:
How are regular steel screws made? I suppose since the threads on the extruders are farther apart with flat surfaces between them (the shaft body), you would use a milling tool that moves along removing material down the length of the shaft. Have you tried using Google or Google Images with good search terms to find examples of various screw manufacturing processes? Google-fu is an important skill to develop... :smile:
Yesss I have searched on the Google. But I can only find those big plastic extruder screw manufacturing process. So I am curious about how are small sizes extruder screws for 3D printer are made by those manufacturers :)
 
Tung Jian Seng said:
Currently I am working on an assignment about making an extruder screw for screw based 3D printer. I am confused that actually what kind of machines those manufactures out there using to manufacture this kind of extruder screws ?
Welcome, Tung!
Do you have to make the screws or also to design them?
Can’t you find spare parts if for existing printer?
 
Tung Jian Seng said:
So I am curious about how are small sizes extruder screws for 3D printer are made
Can't you just machine them?
 
An extruder screw usually has three separate sections, each with a different OD, ID, pitch and profile. That makes it difficult for the average workshop.
I would use an axial NC grinder.
A modified 4-axis engraver could do the job if the head was replaced with a 90° degree head and a cutting disk.
What are the dimensions and details of the screw you require?
 
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  • #10
Lnewqban said:
Welcome, Tung!
Do you have to make the screws or also to design them?
Can’t you find spare parts if for existing printer?
Hi, Lnewqban !
I need to design a modular machine tool that can be added on a lathe machine and make extruder screws for 3D printer.
 
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  • #11
Baluncore said:
An extruder screw usually has three separate sections, each with a different OD, ID, pitch and profile. That makes it difficult for the average workshop.
I would use an axial NC grinder.
A modified 4-axis engraver could do the job if the head was replaced with a 90° degree head and a cutting disk.
What are the dimensions and details of the screw you require?
I need to design a machine tool that can be added on a lathe where it can be used on making extruder screws for 3D printer. I am planning to use an angle grinder. But before that I need to survey how those manufacturers actually making this screw. The survey is for benchmarking purpose.
 

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  • #12
anorlunda said:
Can't you just machine them?
It is a project I need to design a machine tool that can be added on a lathe where it can be used on making extruder screw for 3D printer. But before that I need to do benchmarking. So I want to know what kind of machines that manufacturers out there actually using on making this kind of extruder screws.
 
  • #13
Tung Jian Seng said:
I am planning to use an angle grinder.
Your screw is simple with only one ground flute. A tool post grinder will do that job. You might use an angle grinder as a crude tool post grinder.

You will need to modify the lathe. The lead screw on a lathe is probably finer than the screw you are grinding. Because the pitch of the extruder screw is longer, you will need to drive the lathe lead-screw very slowly with a motor and reduction gearbox. The chuck holding the extruder screw is then driven from the lead screw through a reduction ratio that sets the pitch of the thread you are grinding.
 
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  • #14
Last edited:
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  • #16
Tung Jian Seng said:
It is a project I need to design a machine tool that can be added on a lathe where it can be used on making extruder screw for 3D printer. But before that I need to do benchmarking. So I want to know what kind of machines that manufacturers out there actually using on making this kind of extruder screws.
BTW, is this project for schoolwork?
 
  • #17
berkeman said:
BTW, is this project for schoolwork?
Yupp it is a schoolwork.
 
  • #18
Okay, thanks. I'll move the thread to the schoolwork forums for you now.
 
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  • #19
berkeman said:
Okay, thanks. I'll move the thread to the schoolwork forums for you now.
Thank you very much !
 
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