Packaging Industry producers are seeking the most efficient methods
to produce their end - products to gain economical advantages in
today's market place. Historically, typical sheet thermoforming
facilities acquired sheet from outside sources or produced their
own roll stock for subsequent forming operations. Although the in-line
sheet thermoforming process has been available for many years, the
recent trend by high volume proceducers has been to integrate the
sheet product on line, in-line, with the thermoforming operator.
Several benefits are obtained from such systems:-
 |
Reduced energy consumption in the total
process |
 |
High Volume Production |
 |
Continuous operations improves efficency |
 |
Direct process feed back of thermormed skeletal
reclaim |
 |
Roll stand system down - sized, reduceing
space utilisation |
 |
Timely production of furnished goods, reducing
inverntory level requirements. |
Packaging resins typically processed include Polypropylene, Polystyrene,
Polyester, ABS and Polyethylene. End products consist primarily
of packaging goods like Cups, Plates and Containers. Producers have
applied the system to both shallow and deep draw goods. The extrusion
complex is closely coupled with the downstream equipment, with the
thermoforming line is to retain residual heat in the sheet, reducing
the reheat demand at the forming station. In addition, the down
sized sheet conditioning unit brings a lower capital cost for the
extrusion complex, plies a reduced floor plan requirement. The extrusion
complex is designed to reprocess 100% of the clean, ground, thermoformed,
skeletal sheet which may be a monolayer or Co-extruded structure
improving the overall process efficiency.
Courtesy: E.J.Smith, Davis Standard
Corporation, U.S.A. SPE Extrusion Division Newsletter, March 2000.
|