The diagram illustrates the various stages in the production of plastic items. Clearly this is a complex process that requires a range of equipment and machinery and, at some stages, skilled workers.
Initially, the raw materials have to be transported from the oil refinery to the plant. On arrival, they are poured into a large drum and from there they pass into a special oven, heating the material at high pressure so that long molecules of plastic form.
The granules are then funnelled into a rectangular moulder with a narrow end. The moulder melts the plastic in order to push it out into a mould. When the plastic has hardened in the mould, the items can be removed and any waste material discarded.
Before they can be packaged, the finished products have to be checked for any problems, so next they are placed on a belt and observed by an expert. If they pass the inspection, they can be packed into boxes and taken to a warehouse for storage.