FIELD: roller unit for guiding tube in extrusion plant for making different-diameter tubes and such extrusion plant.
SUBSTANCE: roller unit includes at least one roller mounted in holder. There are means for automatically positioning said roller in vertical direction depending upon its load. Extrusion plant includes extruder, adjustable calibrating device and cooling apparatus. Tube being made is guided along guide that at least partially is made of row of roller units arranged one after another in unloading direction. Rollers of row of roller units have at least two different geometries. There are also means for automatically positioning rollers in vertical direction depending upon diameter of made tubes.
EFFECT: possibility for automatically adjusting for different diameters of tubes, good supporting of made tube which is guided being maximally centered.
9 cl, 5 dwg
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