HDPE Grinder Machine for HDPE and LDPE Recycling

Yes. HDPE and LDPE are both polyethylenes and cut well on the same blade-and-screen system, and the machine does not care about the density difference. What matters commercially is keeping the regrind streams separate: HDPE regrind goes back into rigid products (pipes, containers), LDPE into films and flexible goods, and a mixed batch fetches less. Most plants run the two materials in separate batches on one machine and simply clear the chamber between runs.

HDPE pipes recycle very well, and pipe regrind is in steady demand from pipe extruders themselves. The practical question is feeding: a 6-metre pipe does not drop into a grinder hopper. Pipes are pre-cut into sections sized to the machine’s throat (a 20″ × 20″ throat, for example, takes correspondingly sized pieces), and thick-wall sections should go to the higher-HP models so the rotor keeps cutting without stalling. Tell us your pipe diameters and how thick the walls are, and we will specify the right model.

The blower conveys regrind pneumatically out of the cutting chamber into collection bags the instant it passes the screen. Without it, light PE regrind piles up under the machine and someone must keep raking and bagging it. With it, the chamber stays clear (steadier throughput), the floor stays clean, fine dust ends up in the bag instead of the air, and one operator runs the whole station. For dedicated HDPE and LDPE work running full shifts, that usually makes the blower worth having. See the RE Series CB Grinder with Blower page for blower motor ratings per model.

Most blow molding and injection molding lines in India accept regrind from a standard screen comfortably, blended with virgin granule. The screen controls output size: 12–15 mm is standard, and we make it to your buyer’s or your own line’s specification. Because the screen is a replaceable part, you can change regrind size later without changing the machine.

That depends on your product and quality standards. Common practice in Indian blow molding and pipe extrusion is to blend a proportion of clean, single-grade regrind with virgin material, with the ratio set by trial against your product’s strength and finish requirements. The grinder’s job is to give you regrind clean and uniform enough that the blend works: single polymer, consistent size, no overheated or degraded material. Your polymer supplier or our team can advise starting ratios for your application.

Every machine is quoted to the job, so we do not publish prices. What moves the number is the model and its capacity, the material and how thick it is, the motor rating, MS or SS construction, and options such as blower discharge and the screen size. Our guide to what drives machine cost walks through each of those. Send us your material and daily volume and we will size the machine and quote it.

Convert your scrap to kilograms per day, divide by your working hours, and size against your heaviest material rather than your average, because thick-wall and bulky items grind slower than thin bottles. As a guide, the RE12 is rated at 60–80 kg/hr, the RE16 at 150–250 kg/hr and the RE20 at 250–400 kg/hr. With a blower, the RE25CB is rated at 400 kg/hr and the RE30CB at 550 kg/hr on light material. Our machine selection guide covers this step by step.

Yes on all three. Bring your HDPE or LDPE scrap and we will run a live trial before you buy. We provide installation and maintenance service on site, with service and spares support across India, and blades can be re-sharpened as routine maintenance. For export orders we supply motors matched to your country’s voltage and frequency. Contact us to arrange a trial.