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Shredders for plastic waste


"RostPoliKraft" Production Company ("RPK") manufactures equipment for processing plastic waste such as single-shaft shredders and two-shaft shredders.
Single-shaft shredders
High performance. Low power consumption
Designed for processing a variety of plastic waste: LDPE, HDPE, LPVED, PET, etc. and composites thereof, consumer goods scrap, defective plastic products and scrap thereof, technological waste – drainings, sweepings, runners, yarns, fibers
Main components:
Shaft
Cutters with 4 cutting edges, extend the service life by 4 times
Interchangeable cutter holders
Adjustable counter cutters
The cutters are made of hardened high-alloy steel
Mesh
Reinforced coating
Opening by means of pneumatic cylinders from both sides
Serviceability
Bearings
Placed out of the crushing chamber
Rugged housing design
Low maintenance
Hydraulic pre-press
Teeth to prevent slippage of material
Segmented guides providing self-cleaning, and also preventing the material entering under the press movable parts
Hydraulic pre-press performs the function of supplying the treated material to the shaft; removable meshes allow to obtain the desired fraction size.
Drive unit
Gearbox with high torque
Mounted on anti-vibration holder
High-quality drive belt
Hydraulic transmission for motors
Hydraulic system
Completely housed in the machine casing
Air cooling system for continuous operation
Adjustable speed of the hydraulic pump
Control Panel
"Intelligent programs"
Automatic control of the shaft loading, which allows:
- In case of overload to avoid damage to the cutters and the motor by enabling auto-reverse
- Stopping the motor in case of "idling" operation

Two-shaft shredders
They are used for crushing of bulky waste.
All shredder assemblies are located and secured on a common frame: grinding block with drive unit, fractioning mesh, feeding hopper, electronic control system.
The shredding block consists of two shafts mounted in the housing on the self-aligning bearing assemblies rotating in opposite directions, which accommodate toothed disc cutters. Grinding discs of shredders are made of high-alloy heat treated steel. They do not require sharpening during operation and are designed for long life. Presence of mineral and metal impurities in the processed raw materials does not affect the work of the shredder and has no any consequences.
Electrical actuator is supplied with protection system that allows shredder to work on different materials. Reverse (backward travel) is automatically activated if foreign objects enter the work area, in case of overloading or jamming, which prevents failure of the main unit.

Classification screen
To obtain calibrated fraction the shredders are equipped with a classification screen installed under the grinding rolls. Structural shapes and sizes of the screen are determined by the manufacturer according to the customer's specifications.

Shredder and auxiliary machinery hydraulic system
Shredder is driven by the adjustable hydrostatic transmission and planetary gearbox.
Hydrostatic transmission consists of an adjustable axial piston pump and an adjustable axial piston motor.
The use of controlled hydrostatic transmissions of the shredder roll drive provides a number of advantages in comparison with the "classical" electro-mechanical drive:
1. Reduction of rated capacity of up to 50%
2. Increased efficiency of up to 60 - 80%
3. Guaranteed protection from falling objects not to be grinded
4. Functions of stopping the rolls under excessive load, reversing and starting to stroke “under backlog”

Shredder is equipped with one hydrostatic transmission, which moves the drive shaft. The driven shaft is moved by the drive shaft through a gear built in the grinding unit.
Shredder is equipped with two hydrostatic transmissions, each drives own shaft. Hydrostatic transmission is driven by electric or diesel motor.

Control system

Management is carried out by means of electronic systems based on programmable controller that allows you to control the shredder, to avoid critical operating conditions, as well as to monitor emergency situations.
The electronic control system controls the motor, performance of hydraulic pumps and motors, auxiliary machinery, auto reverse mode.

Shredder frame

The shredder frame design ensures its stability in operation, handling, and transportation.
For handling the shredder has hoisting frame elements.
The frame design allows its use on unprepared sites with even surface.
Shredder frame is designed to accommodate the hydraulic actuator, electronic control system, auxiliary machinery.
It is possible to develop a frame on the customer specifications.

Feeding hopper
Hopper design ensures accurate feeding of raw materials in the capture zone and grinding by rolls.
The following special versions of hopper are available:
•    For conveyor feeding of raw materials;
•    For manual loading raw materials;
•    With movable side wall;
Feeding hopper can be equipped with:
•    Cover, to avoid release of raw fragments;
•    Exhaust ventilation for bulk or hazardous materials;
•    Ventilation.

Optional equipment

Shredders can be equipped with optional equipment:
•    Belt and chain conveyors;
•    Feeders;
•    Magnetic separators;
•    and so on.
Optional equipment developed and manufactured by PC "RostPoliKraft" ("RPK") is designed for manufactured shredders so that it corresponds to:
•    characteristics of the raw material;
•    methods and speed of loading of raw materials;
•    shredder performance;
•    fraction of derived raw materials at the output;
•    and so on.
Accessories are not included in the basic delivery set and delivered separately on the basis of the agreed customer specifications.

Shredders made by "RostPoliKraft" Production Company are effective and reliable in operation, feature with simple design, easy installation and operation; they may be included in the in-line sorting conveyor lines, possibly modified in accordance with the specifications. Flexible pricing policy of the company will satisfy the customer.


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