err...it works fine at temperatures around 120 C. but can anyone propose an alternative design that would work?by rammstein737 - Tissue Engineering
basically I want to make bone scaffolds, So I would be extruding PCL with a diameter of about 100 microns. The main idea is to increase the pressure at the exit end without backflow. (check attached diagram above) Do you know any design other than mine that would work in this case? Like for example, another idea is to keep it as a normal linear screw extruder for half the length and tapering thby rammstein737 - Tissue Engineering
Its still in design stage, havent decided about the material - maybe steel...I have normal screws in my lab which are small and work fine using the material (cant recall exactly what )----by tapering,I don't mean to an extent where screw tip would be too small, so that shouldn't be a problem....The screw root i presume would be less than 12mm in diameter, thats where I need help because I can'tby rammstein737 - Tissue Engineering
Hi all, I want to fabricate a tapered barrel screw extruder for extruding pcl through a 100 micron nozzle. Please refer the attached diagram. The outer diameter of the larger end is 24mm and is constant. Also, I wish the inner diameter at the larger end to be 14mm. The length of the barrel is 84 mm; you can increase the length if it is to increase the extrusion rate. Can you please tell me whatby rammstein737 - Tissue Engineering
oh..thats awesome! ....is it possible for you to share a website giving info about the above said extruder? or any pics? Thanks a ton!by rammstein737 - Tissue Engineering
hmm....yeah 50 micron is too small for the nozzle but then thats what i want. Since you're saying that back flow is a serious problem, would back flow reduce if i used a tapered screw extruder or a step screw extruder? Are there any other alternatives or use screw extruders of a different design?by rammstein737 - Tissue Engineering
Hi all, I have a screw extruder that's being used to make bone scaffolds. The nozzle that I have fixed to the bore at the outlet is of diameter 100 microns. I plan to replace it with one having 50 microns diameter. The material being used for extrusion is polycaprolactone (pcl). Should I have any problems like back flow due to the pressure exerted? If there are any problems, would a tapered screby rammstein737 - Tissue Engineering