Shredder machine is a machine used for rough crushing, usually used to process unprocessed raw materials or scraps, making their size smaller. A representative example is the shredding of plastic or rubber scraps as raw materials, which will be melted and granulated to be used to remake plastic bottles, tires, trash cans, and so on. The shredder is applied in the recycling industry, commonly used for crushing large diameter PE plastic pipes, bundled plastic films, large piles of plastic sheets, and plastic lumps.

The applications of shredders generally include:
1. Tear the bad quality products into smaller pieces for recycling.
2. Reduce the volume of unprocessed raw materials for mixing with other materials.
3. Shred organic matter to make biofuels.
4. Shred some textile materials for fiber reuse, such as crushing carpets.