I'm hoping someone can help me out. We run a Krones Rotina cold-glue labeler, and lately I have been having a heck of a time trying to keep the glue pump running. The glue pump is an air operated piston pump, and it will run fine for a while, and then quits moving. It is not locked up, since we can move the piston up and down easily by hand. If we transfer the pump into a bucket of hot water, turn off the air and manually move the piston up and down to work the pump, then after a few minutes it will begin to work well again. We'll start up the labeller again only to have this happen again after about twenty minutes.
I've rebuilt the pump, replaced the air controls. We have good cool air, with a moisture seperator and buffer tank before the bottling line.
To keep it running nowadays, I have to stand by the machine and pour hot water over the pump whenever it begins to slow down.
Has anyone had this problem with Krones glue pumps? The Krones people can't tell me what to do, and I've replaced everything short of buying a new pump (they are not cheap). Are there any other pumps you can recommend? Or a better way than using a pump to get the glue to the labeller?
I've rebuilt the pump, replaced the air controls. We have good cool air, with a moisture seperator and buffer tank before the bottling line.
To keep it running nowadays, I have to stand by the machine and pour hot water over the pump whenever it begins to slow down.
Has anyone had this problem with Krones glue pumps? The Krones people can't tell me what to do, and I've replaced everything short of buying a new pump (they are not cheap). Are there any other pumps you can recommend? Or a better way than using a pump to get the glue to the labeller?
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