printing with polyurethane

[umer-tanveer 0]

Hi

has any one tried to print in polyurethane material with ultimaker2. I tried it but its not moving the material out of nozzle. can anyone help with the temperature settings?

 

[DidierKlein 673]

Hi,

Where did you buy the material? Maybe there's information there?

Are you referring to some flexible materials? If yes you should probably try with another feeder because the stock feeder doesn't work well with flexible filaments

 

[umer-tanveer 0]

it is a flexible material. but it feeds well .. i think the problem is with temperature settings.. cannot figure out what is the suitable temp for it coz it isnt melting

 

[DidierKlein 673]

What is the brand of the filament?

It might be either temperature too low or too much friction in the bowden, or feeder having a hard time moving the material...

 

[umer-tanveer 0]

locally purchased this material in filament shape.. very flexible and rubber like material .. at 240 to 260 it starts burning and smells really bad. at 210 it melts but doesnt extrude ..

 

[DidierKlein 673]

Hard to help you, all i can say is for UM Flexible filaments print at 230°c the trick is to have the most constant speed all the way long, so i print everything at 30mm/s (even the first layer).

Check if the feeder is not jammed with the filament, it happens often that flexible filament goes in every path possible (it helps having IRobertI's feeder from youmagine with the filament guide.

 

[donmilne 1]

I tend to think of PU as a curable resin. Can it be used as a thermoplastic? I can't find any details on melt temperatures etc.

 

[mgg 0]

it really depends on the type of polyurethane. There are thermosetting polyurethanes which do not melt but only decompose. I would be really careful heating up unknown material, as these polymers can have dangerous decomposition products

 

[cecilievf 0]

Have you checked that the material enters the nozzle properly and is not stuck on the edge of the white thermocoupler? I had that issue sometimes when printing with FilaFlex.

Also oiling the material a little bit also helps witht the feeding. For me the friction got too big but only after the material being fed almost completely into the nozzle.