Bench top Lab Mill

by **Dr. Dick** on Mon Jul 16, 2001 11:29 am

Dan
Did you resurface the rolls in house or send them out side?

Did you check for "roundness" after the rolls were refinished? It sounds like one or both rolls are not a true round. You can check this out using a lathe by centering the roll in the chuck and rotating while bringing a magic marker or crayon in on the bit holder.

Did you check that the rolls were properly centered when they were remounted in the mill? Did you check for wear in the bearings and are you sure that everything was replaced in the original orientation and nothing was reversed?

If I recall correctly you can't get a piece of paper between the closed rolls of a new mill.

Hope this helps.

Dr. Dick

by **mike marini** on Wed Jul 18, 2001 8:48 am

Hi Dan
The rolls should not "chew" at each other even without material. I believe after you verify all of Dr. Dicks suggestions, it should fix the problem.
Let us know how you make out

Mike Marini
Plant Systems Moderator
mmarini@plastics.com

Website · by **BOB MOORE** on Wed Jul 18, 2001 10:50 am

GOOD MORNING, IT SOUNDS TO ME THAT THE BUSHINGS ARE WORN OUT! REMOVE THE TOP HALF OF EACH BUSHINE AND USE PLASTIC GAUGE TO CHECK FOR WEAR OR EGG SHAPED BUSHINGS.

BOB MOORE INJECTION MOLDING MACHINE SERVICE
P.O. BOX 51247
RIVERSIDE, CA 92517
909 209 0505
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