Henan Doing Mechanical Equipment Co.,Ltd
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What are the types of wood chipper?

Wood chipper

High-Torque Roller :
Shredders that make use of high-torque low-speed grinding rollers are growing in popularity for residential use. These shredders are driven with an electric motor and are very quiet, dust free, and self-feeding. Some of these machines are equipped with an anti-jamming feature.

Disc wood chipper:
The original chipper design employs a steel disk with knives mounted upon it as the chipping mechanism. This technology dates back to an invention by German Heinrich Wigger, for which he obtained a patent in 1922.In this design, (usually) reversible hydraulically powered wheels draw the material from the hopper towards the disk, which is mounted perpendicularly to the incoming material. As the disk spins, the knives cut the material into chips. These are thrown out the chute by flanges on the drum. This design is not as energy-efficient as the drum-style design, but produces chips of more uniform shape and size. Most chippers currently used by commercial tree care companies are disk-type.

Consumer-grade disk-style chippers usually have a material diameter capacity of 6 to 18 inches (15 to 46 cm). Industrial-grade chippers are available with discs as large as 160 inches (4.1 m) in diameter, requiring 4,000 to 5,000 horsepower (3,000 to 3,700 kW). One application of industrial disk chippers is to produce the wood chips used in the manufacture of Particle board.

Drum wood chipper:
A modern drum chipper "Bandit Industries Model 1290H"
Newer chippers employ mechanisms consisting of a large steel drum powered by a motor, usually by means of a belt. The drum is mounted parallel to the hopper and spins towards the output chute. The drum also serves as the feed mechanism, drawing the material through as it chips it. It is colloquially known as a "chuck-and-duck" chipper, due to the immediate speed attained by material dropped into the drum.

Chippers of this type have many drawbacks and safety issues. If an operator becomes snagged on material being fed into the machine, injury or death is very likely. Chippers of this type are also very loud. The chips produced may be very large, and if thin material is inserted, it may be cut into slivers rather than chips, and since the drum is directly driven by the engine, materials that are too large or long may stall the engine while usually remaining firmly stuck in the drum.

Newer models have overcome many of these disadvantages with Auto-Feed Plus invented by Kurt Snider Published October 2000 Tree and landscape equipment trader magazine this digitally controlled Tachometer Auto reverses the hydraulic feed wheels. The reversible feed system allows the newer style drum chippers to handle larger diameter materials. Modern drum-style chippers usually have a material capacity of 6 to 20 inches (15–50 cm).

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