The melt is forced and compressed through the die. Once cooled with either water or other coolants, the extrusion is sized and cut to desired length. Rounded corners if non circular. Hollow profiles with compartments are completly inclosed and can have different wall thicknesses. Hollow profiles with compartments and lugs are similar to the above yet have ribs or flanges.
Solid profiles have no compartments and can be of any X-section.
Composite profiles are made of several materials, or of several sections or differen colored materials. Give generous radii to improve flow and to reduce stress. Check here for an illustration of a extrusion process. Feel free to send us your comments, tips, tricks and hints for injection molding to us in the Plastique Forum .