What is Blow moulding and how does it work?
The Blow moulding process is directly descended from Glass bottle blowing. To manufacture a Blow moulded product requires an array of special purpose machines comprising Air Compressor, Water chillier unit, Blow moulding Machine, Material Mixing and recycling units. Dry plastic materials are first melted and converted into a solid molten mass; this material is then extruded into a tube of material (referred to as a Parison). Two hollow matching mould cavities close around and encapsulate the Parison which is inflated with high-pressure compressed air. The high-pressure air blows the plastic tube against the mould cavities forming and holding the shape. Chilled water is circulated through the mould to solidify the plastic material. After a predetermined time the moulded shape is released. The perfect and simplest shape for a moulded product is an elliptical hollow (Egg) form.
