What is sheet extrusion ?
extrusion is the process of converting plastic pellets or powder into cut sheets
or rolls of plastic. This sheet can be further processed into parts via
thermoforming. The sheet extrusion process can yield sheet products with
thickness ranging from less than 0.010 in. (film) up to and exceeding 2.0 inch,
with widths as great as 30 ft.
What is thermoforming ?
Thermoplastic sheet is re-softened in heated ovens and then forced into contact
with a mold surface by air pressure or vacuum to define the part's inside or
outside shape. The mold only contacts the softened plastic on one side. In
general the appearance side of the part is the non-mold contact side.