The extrusion is the action to give form or to mold a mass causing
get out for an especially arranged opening. The extrusión of polymers is an industrial process, based on the same principle of the
general extrusion, nevertheless the engineering of polymers has developed specific parameters for the plastic. The melted polymer is forced to pass through a mouthpiece, through the push generated by the revolving action of a "screw of Archimedes" that revolves concentrically in a controlled temperatures
camera call cannon, with a precise separation among both elements. The material polimérico is fed through a hopper in an extreme of the machine and due to the action of push
it melts, flows and mixes in the cannon being obtained on the other side with a
pre-stablished geometric profile.
is a pieces production process starting with a sheet of plastic materials
(ABS, PVC, HIPS, PP, PET, etc.) previously obtained and that by the action of the heat supplied by a screen, plate or oven, elevates the temperature of
the sheet to be ideal for deformation. Then with the utilization of a mold added to the action of compressed air or
vacuum (inclusive can be both) causes adheres laminates to the mold which by being
cold stiff the piece. In some cases to stretch laminates pre-formers are utilized. The molds can include edges to separate the contour of the piece
from the flat sheet, which remained with the "hole" generated by the extraction of the piece.
The molding by injection is a
semi-continuos process that consists of injecting a polymer in melted state in a closed
mold to pressure and cold, throughout an small orifice call floodgate. In that mold the material solidifies, beginning to crystallize in polymers
semi-crystallines. The piece or final piece is obtained upon opening the mold and remove the
molded piece from the cavity.