A plastic granulator machine supplier manufactures the size-reduction equipment that turns sprues, runners, rejected parts and purgings into reusable regrind. Specifying the right machine is a throughput question before it is a price question, because an undersized granulator becomes the bottleneck of a whole moulding shop. This guide covers the machine families, the specifications that decide output and the checks to run before ordering.
Machine Types Every Plastic Granulator Machine Supplier Offers
Quotations separate into two families, and the split follows the plant's layout:
- Beside-the-press granulators - compact units next to the moulding machine, sized for roughly 20-150 kg/h of sprues and small parts.
- Central granulating systems - bulk machines in a dedicated area, fed by trolleys or vacuum piping, sized for 200-800 kg/h across the shop.
Compact beside-the-press models cut above a removable bin and are reversed or opened for cleaning between resin or colour changes; slow-speed, sound-insulated versions cost more but cut noise, dust and fines in a working plant.
Specifications That Decide Throughput
Throughput is never a single number, because a machine only reaches its rating on the scrap shape it was tested against. The specifications that actually decide output:
- Cutting chamber geometry - rotor width and diameter set the bite per rotation; wider chambers swallow longer purgings without jamming.
- Blade configuration - two to five fixed blades plus rotating cutters, with shearing profiles for thin-wall parts and oblique angles for thick sections.
- Screen aperture - 6-12 mm screens set the regrind particle size and keep material in the chamber until it is small enough.
- Drive power - 2.2-22 kW across the range, with VFD control protecting the drive when hard parts load the rotor.
Ask for the rated throughput with the test material stated, and for behaviour under a proof load of your heaviest parts.
Safety, Noise and Serviceability
Interlocked access doors, emergency stops and overload protection are the baseline for any rotating-blade machine, and CE-marked control panels are the norm for units shipped to Europe. In service, blade sharpening and replacement are the main consumable cost, so blade steel grade and the expected sharpening interval belong in the quotation, not in an after-sales conversation.
Questions to Ask a Plastic Granulator Machine Supplier
Request the throughput for your actual scrap mix, a particle-size guarantee at the stated screen, the blade steel grade and the electrical drawings before payment. Price is quoted per set against the drive configuration. The custom molding directory lists moulding partners that run granulators in-house, our auxiliary equipment buying guide covers the dryers and chillers that usually sit on the same purchase order, and regrind sourcing connects with the plastic products directory. Machinery suppliers by region are listed in the supplier directory.
Related product categories
The materials and part types discussed above are grouped in our sourcing directory:
