Extruding Nylon...PA12
By abuhafss
Published: April 16th, 2011
Published: April 16th, 2011
I want to extrude simple rigid tube 10mm outer diameter and 8mm inner in Nylon 12 (PA-12) but, the raw material is not available with the local stockist. Only injection molding grade is available. I tried to extrude it but, when I apply heat at the beginning of the barrel, the material melts and jams the screw. And if do not apply heat at the beginning, the motor seems to be not powerful enough to drive the material to the nozzle.What should I do???
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You may want to contact a
You may want to contact a company called RTP..They have several companies in the United States..They specialize in custom compounding..
It's fine if you can get
It's fine if you can get extrusion grades (Degussa is now Evonik and there are other suppliers) but if you can't, you have to adapt --
first, make sure material is dried enough but not too much. Water is a plasticizer as well as a degrading agent (hydrolysis) for nylons.
remember that the molding grade should be less viscous (longer molecules) than the extrusion grade.
If motor can't take load, maybe top speed is too high. Some motors only deliver top power at top speed, so are lower in power at lower speeds. Possibly a set of pulleys carefully specified will solve the problem.
It should be possible to find the appropriate combination of preheat temperature (dryer) and barrel temps that will make it work.
ALGriff, Forum moderator, algriff@griffex.com
It's fine if you can get
It's fine if you can get extrusion grades (Degussa is now Evonik and there are other suppliers) but if you can't, you have to adapt --
first, make sure material is dried enough but not too much. Water is a plasticizer as well as a degrading agent (hydrolysis) for nylons.
remember that the molding grade should be less viscous (longer molecules) than the extrusion grade.
If motor can't take load, maybe top speed is too high. Some motors only deliver top power at top speed, so are lower in power at lower speeds. Possibly a set of pulleys carefully specified will solve the problem.
It should be possible to find the appropriate combination of preheat temperature (dryer) and barrel temps that will make it work.
ALGriff, Forum moderator, algriff@griffex.com
At my last job, we made fuel
At my last job, we made fuel lines (multiple layers) for automotive use. We used a lot of nylon. All of ours came from a company in Germany (Degussa). The material they manufacture is of a very good quality. This was all extrusion grade materials.
At my last job, we made fuel
At my last job, we made fuel lines (multiple layers) for automotive use. We used a lot of nylon. All of ours came from a company in Germany (Degussa). The material they manufacture is of a very good quality.