PP Plastic Shredder and PP Grinding Machine for Recycling

The full range of rigid and woven polypropylene: dairy, beverage and logistics crates. Bottle caps and closures. PP woven sacks (cement, fertiliser, grain bags). Molded furniture like chairs, tables and stools. And general PP molding scrap. Bulky and woven items go through the dual shaft shredder first. Small dense items like caps can feed straight into an RE-series grinder. If you have an unusual PP item, bring a sample for a trial. That settles it faster than any datasheet.

Three types, each for different scrap. A dual shaft shredder uses two slow, interlocked shafts to tear bulky, hollow and flexible plastic such as crates, furniture, woven sacks and film. A single shaft shredder turns one rotor against fixed blades, with a screen that sets the piece size, and suits thick lumps, purgings and heavy rigid parts. A grinder, or granulator, cuts smaller pieces and shred into uniform regrind against a screen. For mixed PP, the usual line pairs a dual shaft PP plastic shredder with an RE grinder. Which suits you depends on your material and volume, and a trial on your own scrap settles it.

Geometry. A crate is a rigid hollow box bigger than most grinder throats. On a high-speed rotor it bounces, deflects and jams long before it cuts. A dual shaft machine’s two counter-rotating shafts grip the item and pull it down between interlocked blades, tearing it apart with torque. The same grip-and-rip action handles curved furniture shells and folded sacks. Grinders excel at the next stage: turning that coarse shred into uniform granules. See the dual shaft shredder range for how the mechanism works.

Wrapping is the classic failure mode for woven PP on single-rotor, high-speed machines: the tape winds around the shaft like thread on a bobbin. Slow-turning dual shaft designs are far more resistant because the interlocked blades keep pulling material down and through rather than letting it spin. Practical tips that help further: feed sacks in batches rather than a continuous stream, and keep strapping and liner bags out of the feed. Raj Electricals also builds dedicated machines for cement bag and non-woven bag shredding.

A dual shaft shredder produces a deliberately uneven coarse shred. That is normal for dual shaft machines and is exactly what granulators and large recyclers buy for further processing. If your buyer is an injection molder, or you reuse material in-house, add the RE-series PP grinding machine: its screen, 12–15 mm as standard, sets the granule size and can be made to your specification. You can start by selling shred and add the grinder once volumes justify capturing the extra margin.

Yes, meaningfully. Single-colour lots (all-blue crates, all-white caps) can be reprocessed into visible parts and command better rates. Mixed-colour regrind generally goes into black or dark masterbatch applications at lower prices. The sorting costs you only labour at the collection stage, so keep colour lots separate before shredding. Source segregation is the cheapest value-add in the whole PP recycling chain.

Every machine is quoted to the job, so there is no price list. What moves the number is the model and its capacity, the motor, your material, MS or SS construction and the options you add, such as a blower, a conveyor or a control panel, plus how you feed and discharge the machine. Our guide to plastic shredder machine price walks through each of those. Send us your material and daily volume and we will size the machine and quote it.

Yes. Send or bring a representative lot (your heaviest crate, your dirtiest sacks) and we will arrange a trial so you can verify throughput and output on your actual material. We also provide installation and maintenance service on site, spares support across India, and export builds with motors matched to your country’s voltage. Contact us to arrange a trial.