Granulators are used for reducing the size of plastic waste such as runner systems or scrap components. This allows suitable material to be
re-processed. Smaller units can be located next to a processing machine, for example, to be fed a runner system by a robot or sprue-picker, this being processed and fed back into the machine in a ‘closed loop’ system. Larger units can be used to meet the needs of a whole factory, being able to process larger items. These centralised systems tend to be isolated from the rest of the production area, as noise levels can be high.
Shreddersare generally used to break down large cumbersome items such as film bales, plastic purgings, automotive bumpers, pipes, profiles and even voluminous parts such as bins. In order to re-use the shredded material, it may first have to be granulated.