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Plastics extruders perform a manufacturing process whereby a plastics material is pushed and/or drawn through a die to create long objects of a fixed cross-section. Hollow sections are usually extruded by placing a pin or mandrel in the die, and in some cases positive pressure is applied to the internal cavities through the pin. Extrusion may be continuous (producing indefinitely long material) or semi-continuous (repeatedly producing many shorter pieces). Plastics extruders produce many different plastic objects. Extruded plastics can be used in tubing, pipes, rods, rails, seals, or other plastics applications. Plastics extruder manufacturers produce different types of plastics extruders, depending on the requirements of their customers.
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