Extrusion blow moulding

Its up there with life’s BIG questions

We’ve got no idea what the answer is to 3 of those questions (unless we’ve had a few beers then we could theorise) however we do know a bit about modular pontoons, so here goes!

  1. Plastic resin (granules or powders) are melted in an extruder to around 180 degrees Centigrade and forced out into a hollow tube called a parison.
  2. This parison is then captured by closing it in a cooled metal mould.
  3. Air is then blown into the parison, inflating it into the shape of the mould and therefore the hollow product.
  4. After the plastic has cooled sufficiently, the mould is opened and the product is ejected.

Waste material formed during the process is granulated and fed back to the extruder for re-use.

The selection of the grade of plastic material is critical to the performance of the pontoon float. An Ultra-high Molecular weight High Density Polyethylene material (UHMW-HDPE) is used with characteristics which give a strong and tough, but not brittle, pontoon float. Ultra-Violet inhibitors are added to the plastic material in the extruder to ensure the pontoon floats won’t degrade, even in the fierce sunlight of Central Africa.

So there you have it, that’s how modular pontoons are made. If you’d like to buy or hire one of our pontoons then get in touch with the team, we’d love to help out!