What is Profile Extrusion
Extrusion process is a kind of production technique for plastic. and profile extrusion means extrusion of a molding product which have many kinds of parameters except for sheet or film products.
Generally, profile extrusion will consist of hollow types and solid types. these products could be tube, frames, or any door seals or others. they are produced this way so can be called profile extrusion.
To process hollow shapes a pin or mandrel is utilized inside the die to form the hollow sections. Multiple hollow sections require multiple pins. To create these hollows a source of air is required to allow the center of the product to maintain shape and not collapse in a vacuum. Usually an air source will be utilized to keep the correct airflow in the cavity.
If two or more materials are required to make a product, the co-extrusion process is used. For example, a white drinking straw that has 2 colors of stripes on it, requires a total of 3 extruders.
Each extruder feeds a different material or variation of the same material into a central co-extrusion die.
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