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UFS supplies a complete line of hardened bore barrels used in the processing of a variety of extrudates, as with screws, barrels are manufactured in with numerous features unique to the desired product being produced. These include jacketed and non-jacketed barrels depending on the desired type of thermal control being used in the process. Whether injection molding, extrusion or expansion processing, all barrel bores are treated with one of the following wear resistant options:
| Type |
Features |
Wearability Rating |
| Carbide Bimetallic |
Furnace spun |
extreme wear |
| Standard Bimetallic |
Furnace spun |
high wear |
| CPM 9-v |
Heat Treated |
extreme wear |
| D-2 tool steel |
Heat Treated |
high wear |
| Nitralloy 135 |
Ion Nitirded |
high wear |
The different barrel types are very important to be supplied with a compatible screw package to optimize processing. Each has a benefit to specific processes with cost effectiveness and process wearability as the key components.
Reconditioned Barrels
Similar to feed screws, optimizing barrel life by re-sleeving process barrels is an important cost saving technique. During the process the barrel core is reused and the worn bore is machined to accept a new sleeve. Any of the aforementioned hardened bores are available for this type of repair. The barrel is brought back to new specifications and is guaranteed as such. It is not cost effective in all case but generally yields 30-40% savings as compared to new. In the case of a break down re-sleeving is usually limits down time considerably as standard deliveries can be expedited to as little as 4-5 days. |
