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PLASTICS & FILM

Plastics and Film Blown and Cast:

Machine alignment in the above industries is critical due to the nature of the process where a product is conveyed through a web path and also from the point of extrusion.

Typical alignment checks should include:

All rolls/units being on a common centre line.
All rolls/units being 90 degrees to centre line, (parallelism).
All rolls/units level and at the correct elevations.
Straightness of extruder bores.
Vertical and plumb for blown extruders.
Profiling of cast extruders.

Extruder

Typical problems directly attributed to mis-alignment.

Poor web tracking
Slack edges/wrinkling
Mis-registration
Excessive vibration

Mechanical failure on items such as:

Bearings
Bushes
Roll journals and roll covers
Stretching of plastics/film
At the point of extrusion- uneven product thickness, poor temperature control, marks and shadows
Poor lamination

By carrying out the alignment at the initial stage of a new installation or by re-aligning an existing line can result in:

Increase running speeds.
Improved quality/productivity.
Minimising product and energy waste.
Reduction in maintenance costs /down time.
 
Other typical applications in these industries could include:
 
Laser shaft alignment on pumps /motors/Gear boxes and line shafts See laser shaft alignment for more information.
Profile of extruder die.

Extruder Die
  
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