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| Author | Topic: extruder gearbox |
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uwit Member Posts: 1 |
posted March 07, 2007 01:48 AM
  
hello, we're having problem with our single screw extruder,particularly in the gearbox, bec. the extruder will run for few days, but after that, the pinion gear of the gearbox gets wornout,means all the teeth gets damages. We're using Horizontal type gearbox, size 140,ratio 14:1, while the extruder specs is; barrel O.D = 150mm , screw dia.90mm, length 2115mm, 10 heater @ 2kw ea. We're extruding LLDPE. I will appreciate your recomendations on this... thank you IP: Logged |
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Steve H Moderator Posts: 407 |
posted March 07, 2007 03:47 AM
Hello uwit Welcome to the single screw forum Can you post some pictures that show the wear and general layout of the gearbox. Do you have the makers name of your machine? ------------------ If at first you don't succeed, skydiving is not for you. IP: Logged |
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Bob Cunningham Senior Member Posts: 124 |
posted March 12, 2007 11:42 AM
If your gearbox is seizing, are you replacing both gears each time? If not, how do you manage to get it running again? Sounds like some big problems that will require a rebuild. -Bob C. IP: Logged |
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plastics Senior Member Posts: 27 |
posted March 13, 2007 11:00 AM
Can you update me on your motive power on this extuder and throughput you achieve on LLDPE and max rpm of screw run.Look like you have wor reduction gear box and need to switch to a helical gear box.Also if you let us now the gearbox manufacture it would help. We can assist in replacement of any component for any extruder,including screws ,barrels,etc. please get in touch vijay boolani BEC  lastic@vsnl.com or inf@boolani.comweb:www.boolani.com
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gpedicino Member Posts: 3 |
posted July 26, 2007 06:34 PM
Check the tolerance, between the screw and barrels, some time big tolerance more than 1-2 mm, cause high vibration to the gearbox and in counsecuence damage it. Rember that the screw has just one point for attach, the gear box attach. the effect of deflection in big tolerance cause what I explain before regards Giacomo IP: Logged |
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