tag:blogger.com,1999:blog-8471106642347408850.post8591755089915603003..comments2023-02-21T08:11:32.219-07:00Comments on RepRap Ideas: Exturder Thermal Modelgeo01005http://www.blogger.com/profile/05207244129346213313noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8471106642347408850.post-65911976522579988922009-01-13T13:03:00.000-07:002009-01-13T13:03:00.000-07:00Thanks for the analysis. I am surprised the model ...Thanks for the analysis. I am surprised the model is such a close fit ignoring convection as without the constriction the effect of convection was noticeable in my results. Also a previous experiment I did, mounting it vertically caused the heatsink to get much hotter because it absorbed the convected heat from the heater. I expect that is currently the case in my other design my other design.<BR/><BR/>The main reason for not going much thinner was that it is hard to centre the tube accurately after threading it. Since the heatsink is plenty cool enough I think halving the length of the constriction would have a benefit.<BR/><BR/>I think 5mm PTFE would not stand the extrusion pressure. The 10mm piece I used does bulge noticeably.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.com