Full Metal HOTEND continous CORK/STOPPER

[wilcd]

Hello,I purchased a Full Metal hotend for my Prusa i3,i suffer continuous plastic STOPPER/CORK after 1-2printings,i'm printing on 245-250 with ABS ,air cooler works ok after first layer .. the plastic cork is made between the end of the air sinker and the beginning of the nozzle metal …. once the plastic cork is made i disassembly and clean it using a hot air gun , the hot end works again but after 1-2printing tests i get the same problem again and again ?

I'm not able to fix this permanently…i did purchase full metal jhead because it claims stops this kind of problems but i got this issue , what can i do ?

Thanks in advance

[Alex-w]

1.heating the hotend
2.Release the screws in your hotend

QQ图片20140623094047.jpg (21.75 KiB) Viewed 12264 times

3.Unscrew your hotend and clean up your abs（keep heating）
4.Tighten the hotend
5.Tighten the Release the screws
now you can enjoy printing

[wilcd]

I usually clean it when i get the cork ,, i just don't remove those screws,,i clean using hot air and removing the cork ,, but i get the cork and 1-2printing again … why the cork is produced? how to make a permanent fix and don't get the cork ? what function those screws is ?

[wilcd]

<Yes i cleaned it and removed the cork using a hot air gun like i told before , but the problem come back after clean just making 1-2printings .. how may i fix this permanently ? and ,, what's the function of those screws ?

[Alex-w]

The upper screw‘s function is choke，the other one is Fixed Laying head

[wilcd]

but my question is :

What's the issue so i get the cork continuously ??? ,,it's a nightmare need to clean the hot end each 1-2printings … i would like to know what's the problem so i avoid the cork is made

[Alex-w]

you don't need to clean the hot end each 1-2printings,the problem isthat the choke is not tightened