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| Author | Topic: Weber Screws |
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plus planner Senior Member Posts: 5 |
posted August 25, 2006 12:49 PM
   
Hi, im new here but i need an answer to my problem. How much water should i put in the screws , after they came back from refurb empty. Many thanks i have learnt many new things about extruding just reading these forums pls keep up the good work. IP: Logged |
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Tom C Moderator Posts: 765 |
posted August 25, 2006 01:03 PM
Wow, I'm not sure what you are talking about. What kind of extruder, and water filled screws? ------------------ Tom Cunningham www.ExtrusionTechnicalServices.com IP: Logged |
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plus planner Senior Member Posts: 5 |
posted August 26, 2006 02:14 PM
Hi the extruder is a Weber DS 85 with parallel screws that we put distilled water inside them to stop burning at the screw tips. But after the refurb they have come back empty.The people who did the work on them filled them last time, but they forgot this time. I was wondering how much percentage wiseto put in. IP: Logged |
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Tom C Moderator Posts: 765 |
posted August 26, 2006 02:37 PM
Running water into and out of screw while they are running is commonplace, but I've not run into screws with water sealed in them before. PVC is typically run on this extruder, and melt temperatures are well above the boiling point of water at ATM pressure. I don't think water will boil in a closed system that is full, but the pressures could be very high. What you want to accomplish is heat transfer from the tip to the rear of the screw. When partially filled the water could turn to stream at the tip, travel to the back of the screw, and condense providing good heat transfer. I think this would work much better than totally full.
------------------ Tom Cunningham www.ExtrusionTechnicalServices.com IP: Logged |
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plus planner Senior Member Posts: 5 |
posted August 26, 2006 04:35 PM
Yes i know that , what i need to know is how much water.For example 75% or 90% of the capacity. You get where im going now. Many thanks IP: Logged |
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Tom C Moderator Posts: 765 |
posted August 26, 2006 07:34 PM
Since I'm a moderator on this forum, and other people rarely answer questions I try to help out as I can. Because I've never even heard of doing this before, I don't know the amount. I was trying to help you rationalize the amount. Of course you could always call Weber and ask them rather than being annoyed with us. If I were forced to quess, as you may be forced to, I would fill it 50%. ------------------ Tom Cunningham www.ExtrusionTechnicalServices.com IP: Logged |
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plus planner Senior Member Posts: 5 |
posted August 30, 2006 03:44 AM
Sorry you took it the wrong way i didnt mean to offend anyone.Thanks for your help and i have now re fitted the screws with 60% distilled water.Now i know this forum is here i will be using it to sort any of my problems being a mechanical maintenance fitter in an extrusion factory. Many thanks IP: Logged |
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