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What are the Fundamental Differences In Between Plastics Granulators and Shredders?

Apr. 08, 2020

Granulation, grinding, slicing and shredding are all usual ways to describe the particular task of size-reduction of scrap that results from plastic processing. Every plastics processing center not only creates a certain level of imperfect product that is rejected as scrap, yet also produces scrap from starting up and dialing-in their manufacturing procedure.

Central Granulator

Central Granulator

Redeeming scrap products can make the distinction between earnings and also loss. However to be important-- whether it is reused back right into the processor sold to others for reusing-- scrap needs to be minimized to a manageable, consistent, and functional size. As well as doing this is the role of plastics granulators and also shredding devices. You can use Plastic Shredder for Home if you need it.

So, what are the standard differences between granulators and shredders and where do they overlap?


Granulators, a typical view in Plastic Shredder Supplier, can be identified right into two teams:

" Beside-the-press" designs are typically made use of to grind relatively little volumes of sprues, runners, and off-spec parts, as well as edge trim from film lines, for prompt recycling back into the procedure.

Central Granulator is normally larger and also much more effective, meant to size-reduce large volumes of scrap from multiple processing lines or molding cells. They might be fitted with unique feeding hoppers to suit lengthy parts like pipe or account extrusion, broad products like a sheet, or to take a break as well as granulate off-spec and also start-up movie rolls. (An unique category of main granulators-- heavy-duty or "hog" granulators, are developed to deal with huge, heavy components and also purgings.).

Generally, granulators run with high rotor speeds (conventional granulators operate at 400-500 rpm) with relatively low torque. (Also supposed "low-speed" granulators have blades that transform at upwards of 190 rpm.) Granulators run largely by cutting/slicing products, with rotors that take duplicated, little bites of product. For cutting power, they depend upon high-horsepower motors as well as hefty flywheels. Also after that, granulators can be subject to jamming as well as feasible blades damages if large parts are dropped in too swiftly.

Shredders are designed for centralized, high-volume work. They commonly operate at lower speeds (100 to 130 rpm), with motor/rotor layouts maximized for high torque that allow them to eat through almost anything. Therefore, shredders are typically seen in recycling applications for numerous products-- timber, steel, as well as paper-- along with plastics. Plastics shredders are developed with single-shaft or dual-shaft styles.

Single-shaft shredders cut scrap downward against one or more stationary bed blades. They usually make use of a bigger electric motor which, together with the stationary bed-knife style, enables heavier-duty procedure, yet makes upkeep and solution much easier. Single-shaft shredders are considered very effective on stiff plastic, film, as well as fiber materials and also, because of this, are quite prominent in the plastics sector.

Dual-shaft shredders designs utilize 2, counter-rotating shafts that cut against each various other to shred scrap. They are thought to be much more efficient in shredding bulky scrap but are extra complex, much more prone to shaft damage and also call for more blade upkeep, since 2 sets of knives are utilized-- one on each shaft.

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