The Principles of Plastic Welding

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					            The Principles of Plastic Welding

These days, we're all looking for ways to expand our services. For those who
want to include plastic welding into their repertoire, know that many of the
principles are the same as welding metal. To start, you need a good joint
prep. You'll also need the right heat and air pressure, plus the right filler
(although some forms of plastic welding such as ultrasonic welding may not
need any fillers). Lastly, as in metal welding, plastic welding requires that
you have the right tip. Just like many kinds of metal exist, it's the same with
plastics. By the way, the word "plastic" is rooted in the Greek termplastikos,
which means "fit for molding."

Plastic falls into two main groups: thermoset and thermoplastic. Thermoset
plastics are not conducive to welding because no matter how much heat is
applied, they do not soften or melt. A prime example of this is polyester. On
the other hand, thermoplastics will melt with heat. Thermoplastics include
polytetrafluoroethylene, polyethylene and polystyrene. Polystyrene is used
widely      in    packaging,   notably     the   plastic   shopping      bag.
Polytetrafluoroethylene, or PTFE, is frequently used as a non-stick coating
for cookware. Resistant to corrosion, PTFE is also used to make laboratory
containers, tubing’s and plumbing thread seal tapes. Lastly, polystyrene is
used to make plastic models, DVD cases and smoke detectors.

Each thermoplastic requires specific heat and pressure to melt. It will be
necessary to know what type of plastic you're welding and its requirements.
In general, the best filler is the same material you're welding. Along with the
proper tip, consider also if the plastics being welded together are of different
thickness. If they differ, then this will be a factor in whether the final product
will be compromised.

One big advantage that plastic welding has over metal welding is that
advances have allowed plastic to be an ideal medium for fast, high-volume
plastic assembly.
To learn more about the insand outs of plastic welding, specifically when
you're planning to weld large volumes, refer to the world leader in plastic
assembly, Plastic Assemby Systems, visit:

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