Composite cork production
Composed corks are produced from an agglomerated body that can have one or two natural cork discs attached on one or two ends. The raw material for the production of granulates, that will later form the agglomerated bodies, is extracted from the leftovers from the production of straight natural corks and discs. These materials are transported from the punching units to the grinding units where they are stored in such way that facilitates the FIFO system.
The first operation is only a rough grinding and aims only to mechanically transform the cork in more homogeneous sized pieces that will feed the mills.
The mills are situated in an underground area of the grinding facility. These mills are equipped with knives and produce a spread of different granulometries. In order to standardize the raw materials, the granulometries need to be separated with the use of an array of sieves.
Once segregated, the granules will be also separated by density, which is done with the use of densimetric tables. These tables use vibration in order to fluidize the granules, so that the lighter ones move at a different speed than the heavier ones allowing the separation of different specific weights in the individual granulometries.
The whole factory is equipped with an automatic control center that allows it to work with no human intervention. Also, the whole factory has a dust removing equipment that removes and collects cork dust that will later be used to power a steam generator producing energy for the factory.