Plastic recycling machine

Most film and bottle recycling lines do not fail at washing or pelletizing. They struggle at the very first step: the material arrives as dense, wire-tied bales, and someone has to turn a one-tonne compressed block into a loose, steady feed stream. Two machines get proposed for that job — the hydraulic guillotine cutter and the shredder — and choosing the wrong one is expensive in both directions. Here is how they actually differ. Bale opening and pre-cutting decide whether the shredder downstream receives a steady stream or a series of shocks. What Each Machine Actually Does A hydraulic guillotine cutter is a slicing machine. The bale is positioned under a heavy blade, and hydraulic pressure drives the blade down through the compressed block in a single stroke, cutting it into slabs. Wires are cut in the same pass. Its output is not small pieces — it is manageable sections that fall apart into loose material a conveyor and shredder can handle. A shredder is a tearing machine....

Your flakes can pass every washing and density-separation step and still come out dirty — with paper labels, film fines, and dust clinging to them. Those contaminants are too light for sink-float tanks and too small for screens. A zig-zag air classifier removes them with the one property they cannot hide: they weigh almost nothing. This guide covers how the machine works, where it belongs in the line, and how its settings are tuned. Inside the zig-zag column, rising air lifts labels, film fines, and paper while dense flakes fall to the outlet. How a Zig-Zag Air Classifier Works Material enters a vertical column folded into a zig-zag path. A controlled air stream rises through the column. Dense PET, HDPE, or PP flakes are too heavy for the airflow and cascade downward from bend to bend until they discharge at the bottom. Light fractions — paper labels, film fines, fibers, and dust — are carried upward, collected through the top hood, and routed to a cyclone and dust filtration. T...

"We already have a magnet on the line — why do we need an eddy current separator?" Because they remove completely different metals. A magnetic separator catches ferrous metal and is blind to aluminum and copper. An eddy current separator (ECS) ejects non-ferrous metal and does nothing for steel. Lines that install only one of the two end up with the other half of the contamination still in the flake. Here is how each technology works, and the order they belong in. An eddy current separator throws non-ferrous metals forward off the belt while plastic falls straight down. The Dividing Line: Ferrous vs Non-Ferrous   Magnetic Separator Eddy Current Separator Removes Ferrous metals: iron, steel, tinplate Non-ferrous metals: aluminum, copper, brass, bronze Principle Permanent or electromagnetic field attracts and holds ferrous pieces A fast-spinning alternating-pole rotor induces eddy currents in non-ferrous pieces; the opposing field repels them off the belt Blind spot A...

Cold washing removes loose dirt. It does not remove hot-melt label glue, cooking oil, grease, or the food residue baked onto post-consumer PET and HDPE flakes — and those are exactly the contaminants that downgrade flake quality and price. That gap is what hot washing exists to close. This article explains when a hot wash step actually pays for itself, how a continuous hot washer works, and how to size one for a washing line. A continuous hot washer keeps flakes immersed in heated washing solution while a high-speed rotor scrubs them. What Hot Washing Removes That Cold Washing Cannot Heat and chemistry do the work that friction alone cannot. In a heated alkaline solution, label adhesives soften and release, oils and grease emulsify instead of smearing across flake surfaces, and dried food residue hydrates and lifts off. The contaminants a hot washer is built for are specific: Hot washing targets Hot-melt and pressure-sensitive label glue Oils, grease, and fat residues from f...

Plastic bottles pile up in offices, schools, laboratories, hotels, and small factories — not in tonnes, but steadily, every day. They are too bulky to store, too light to transport economically, and far below the volume that justifies an industrial shredding line. A small plastic bottle shredder fills that gap: a compact machine that reduces PET bottles and small containers to flakes at the point where the waste is generated. This guide explains what these machines can and cannot do, the specifications that matter, and how to judge whether one fits your site. A compact shredder of the RTMS-C120 class: benchtop footprint, industrial cutting components. What a Small Bottle Shredder Is — and Is Not A small bottle shredder is a low-speed, high-torque cutting machine sized for intermittent, small-batch work. It takes whole PET bottles and similar small rigid containers and cuts them into flakes that take up a fraction of the storage space, are cheaper to move, and are ready for washin...

Every small molding shop and print studio has the same corner: a bin of sprues, runners, failed prints and purge lumps that nobody wants to pay to haul away, but that is far too good to throw in the trash. A mini shredder turns that corner into a small, steady stream of reusable regrind — right where the scrap is produced, with one operator and a standard power socket. This guide is about that workshop job specifically: what the Rumtoo RTMS-C120 mini compact shredder does in a small business, and how to pick the right blade setup for yours. Made for small shops, in short Bench-scale footprint: 650 × 300 × 780 mm — parks beside a molding machine or a printer bench Single-phase power: 220V as standard, 120V on request — no three-phase install, no electrician project One-person machine: 1.5 kW gear motor, automatic reverse clears jams without opening the chamber Two blade setups: a 5 mm general-purpose set, or a 3 mm set for finer, reuse-ready flake The RTMS-C120: a 101...