What characterizes the extrusion process in manufacturing vinyl products?

The extrusion process in manufacturing vinyl products is characterized by shaping material by pushing it through a mold. In this process, raw vinyl material, typically in the form of pellets or granules, is fed into an extruder. Heat is applied to melt the vinyl, and it is then forced through a die, which gives the material its desired profile or shape as it exits. This continuous process allows for the efficient production of long sections of vinyl products, such as piping, sheets, or other custom shapes.

While options involving heating and cooling, casting, or cutting may be relevant in different manufacturing processes, they do not accurately describe the specific mechanics and purpose of the extrusion method for vinyl. In extrusion, the focus is on the positive pressure used to push the molten material through a shaped die, making it distinct from other methods that involve different techniques.