The DPC drum chipper is a machine especially designed to process fibrous bark, as well as wood residues, which are usually mixed with this kind of material.

The machine mainly differs in its innovative construction characteristics, allowing the absorption of a very irregular volume of material, chipping it with high efficiency and productivity rates.

The equipment does not offer any resistance to the material infeed thanks to the big compacting roll, that guarantee a continuous operation and a complete directed material feed to the shredding process.



 

- Great durability;

- Exclusive feeding system with a variable height infeed section, allowing great volume absorption;

- Modern and simple conception which feature standard component operation and maintenance easiness;

- Anti-wearing protection at the high wearing areas - guaranteeing longer durability;

- Knives and counter-knife system designed to allow fast changes, avoiding adjustments needs;

- High mechanical availability;

- Complete Service Support through a technician team;

- High performance through planned training and after-sale service.

Processing material (1) is introduced in the machine through the in-feed belt (2), the lower conveyor roller system (3) and teethed upper compacting roller (4), which bring the material to the machine entrance until reaching the chipping rotor (5). 

The compacting roller hood articulation around its shaft allows the in-feed section opening that varies, according to processing material volume (per equipament technical limits).

Upon arrival at the chipping rotor, processing material is forced against it due to transporting rollers actions, being cut in uniform lengths by the knives (6) and first counter knife (7) and then, discharged after being classified by the incorporated screen (8), in chip shape. Eventual over sized chips,  bigger than designed by the machine project are re-chipped by the second counter-knife (9) until to reach the acceptable size.

Described working system is flexible and final processed chip size control is allowed, through changing of variable components such as: rotor rotation, knives quantity, in-feed speed and chip screen mesh.

Rotor hood (10) and the compacting roller (11) can be easily moved. When they are open, the system is mechanically blocked and the anti-diving hydraulic system is driven, for chipper additional safety.

Knife fixation system is done through clamps (12) and bolts. No wedges and hydraulic devices are required.
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Extremely sturdy and designed to minimize wearing.

Dynamically balanced and fixed to the shaft through an expanding ring system.

Over dimensioned clamps and bolts guarantee the knives stability.

Replaceable wearing plates increase the rotor life and bring the rotor back to original conditions ensuring the correct contact surface for the knife, the machine safety and high performance.

With four usable and resharpening edges. Easy to remove allows fast changes and quick checking.

Bi-part comb with interchangeable counter-knife clamp.

Fixed to the main machine frame guarantee more stability during the re-chipping process.

Hydraulically activated, enables the rotor to reach a complete stoping in 30 seconds, reducing considerably the knife changes time and gives additional safety in case of an emergency shut down.

Sturdy and properly selected for each processing material type the screen. Guarantees the desired size chipped material.

Several items guarantee equipment safe operation:

Mechanical devices for hoods, bearings, rotor and counter-knife locking.

Electrical sensors to avoid involuntary start of the machine.

Hydraulic sensors for valves to immediately block in case of a hose breakage.

Sign plates.

Lower rollers manufactured with interchangeable system segment, guarantee maintenance easiness and quick change of worn parts.

A heavy duty upper compacting roller with replaceable teeth, provides a huge volume material absorption, together with an excellent tractioning performance.

For machines with motors higher than 150 kW, a motor base is supplied together with a driving pulley, support bearings and elastic couplings for an efficient power transmission.

Power transmission between traction rollers done through gears and chains. Sprockets are fastened by taper lock sleeves for easy assembling and disassembling. 

Technical Specifications

DPC Model	Production (t / h) (*)	Power (kW) (**)	Opening Height X Width (mm)	Maximum Log Diameter (mm)	Chips Length (mm)	Knives Quantity (pcs)	Rotor's Diameter (mm)	Rotor's Diameter (mm)
400/600/3RT	up to 14	50 - 150	400 x 600	200	10 - 70	2 - 4	700	6000
500/800/4RT	14 - 20	150 - 250	500 x 800	300	10 - 100	2 - 4	1000	9500
700/1000/5RT	20 - 60	250 - 700	700 x 1000	400	10 - 100	2 - 5	1200	15000
800/1300/6RT	60 - 110	700 - 1200	800 x 1300	500	10 - 100	2 - 6	1600	24500
1000/1700/6RT	110 - 200	1100 - 2000	1000 x 1700	600	10 - 100	2 - 6	2000	38000

* Production calculated based on wood with 40% humidity, humid weight of 800 kg/m3 and 25/30mm - long chips.
** Installed power is directly related to the desired production.
*** Chip length may change according to necessity and is related to the machine performance