Pressure/output Problems Hi All, I've got a problem with one of our extruders that has me stumped. Its a 2.5" barrier flight that extrudes mostly hdpe. Since November, we have had inconsistent output. With everything stablized, pressure slowly drops off by 1000 psi and the extruder amps drop as well. The output drops off affecting our final product. After a minute or two, everything go back to normal. The extruder RPM is steady. All heaters verified and the screw was even replaced. The barrell was measured from one end to the other at 6" intervals. My first impression was slipping but I am not seeing any increase in temnperature. Also acts like its not getting consistent feed. We pulled everything to the feed throat and verified no blockages, everything is clean. The feed section is identical to others in the plant. I'm not sure what do to next!!!! Any ideas? Just a side note, never had a problem until last november. I have 3 others identical to this one with no problems. https://reprap.org/forum/read.php?70,46496,46496#msg-46496 Sun, 17 May 2026 11:48:53 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?70,46496,46541#msg-46541 Re: Pressure/output Problems https://reprap.org/forum/read.php?70,46496,46541#msg-46541
]]> Markus Amsler Plastic Extruder Working Group Thu, 27 May 2010 03:33:49 -0400 https://reprap.org/forum/read.php?70,46496,46496#msg-46496 Pressure/output Problems https://reprap.org/forum/read.php?70,46496,46496#msg-46496
I've got a problem with one of our extruders that has me stumped. Its a 2.5" barrier flight that extrudes mostly hdpe. Since November, we have had inconsistent output. With everything stablized, pressure slowly drops off by 1000 psi and the extruder amps drop as well. The output drops off affecting our final product. After a minute or two, everything go back to normal. The extruder RPM is steady. All heaters verified and the screw was even replaced. The barrell was measured from one end to the other at 6" intervals.

My first impression was slipping but I am not seeing any increase in temnperature. Also acts like its not getting consistent feed. We pulled everything to the feed throat and verified no blockages, everything is clean. The feed section is identical to others in the plant.

I'm not sure what do to next!!!! Any ideas?

Just a side note, never had a problem until last november. I have 3 others identical to this one with no problems.]]> giantsfaninva Plastic Extruder Working Group Wed, 26 May 2010 12:34:46 -0400