using plastic tubes as a mandrel

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using plastic tubes as a mandrel

Author	Message
hadi1990	h hadi1990 posted 4 Years Ago HOT Topic Details
h Group: Forum Members Posts: 15, Visits: 651	Hello, I tried making tubes by wrapping prepreg around POM rod without using any release agent. after removing the part from oven, due to the thermal expansion of the POM rod, the cured tube jut slipped out. I was curious to know if anyone has made tubes using other types of plastics( PTFE Teflon, PET, ) as a mandrel. would be great to share your experiences
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Fasta	Fasta posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	+x hadi1990 - 5/3/2020 1:51:13 PM Hello, I tried making tubes by wrapping prepreg around POM rod without using any release agent. after removing the part from oven, due to the thermal expansion of the POM rod, the cured tube jut slipped out. I was curious to know if anyone has made tubes using other types of plastics( PTFE Teflon, PET, ) as a mandrel. would be great to share your experiences I have done a few s mall parts with Delrin as a mandrel/core and it work great. Yes there is a reasonable amount of expansion and the parts just fall out without the need for any release agents. Not sure how it would go with a length as it may bend ?? Fastacraft Facebook page
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Lester Populaire	L Lester Populaire posted 4 Years Ago HOT Post Details
L Group: Forum Members Posts: 311, Visits: 13K	POM is one of the best materials in my opinion. PTFE would probably work even better due to the higher temperature stability, but isn't necessary and expensive. And to avoid deformation i would recommend to rest the tube in an aluminum angle extrusion during curing so everything stays straight.
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