IMISA 1922 - PK Primary Impact Breakers

COMPONENTS

Generously sized, precisely machined on NC units.

BODYFRAME

Rugged electric welding execution, consisting of the base frame and to the upper casing (in two halves, for opening purpose).

ANVILS

Impact surfaces armoured by high-content Mn steel linings.

ROTOR

Enbloc steel casting or electric welding construction, solidly coupled to the main shaft by means of cone friction clamps.

SHAFT

Special Cr-Ni-Mo steel, vacuum melted, forged and ground, pre-arranged for bearings removal under oil pressure.

HAMMERS

Mn steel or special wear –resistant alloy bars, cutting edge shaped.

BEARING HOUSING

Original IMISA design, cast steel execution, interchangeable.

BEARINGS

Double roller row, self aligning, dust shielding by multiple labyrinths, long lasting grease lubrifications.

FEEDING CHUTE

Strong electric constructions, equipped with a chaines curtain slowing down the arriving material and preventing possible outside ejections of crushed fragments.

HYDRAULIC ACTUATORS

Opening of the crushing chamber by means of hydraulic cylinders operated through a centralized accessory box and easied by fast clampings equipment.

DRIVING GROUP

Squirrel cage type electric motor and hydraulic coupling, V-belts transmission system with fully enclosed protection carter.

TIP SPEED

It may be rated within wide ranges to optimiza the output and the quality of the production, as weel as to proportionate the wears at best.

DESCRIPTION

The primary impact croushers type “PK” are designed to break the raw material by means of a sequence of violent strokes, direct and indirect, inside a crushing chamber. The material, entering along a feeding slide, is repeatedly hit by a set of special steel bars located along the generatrix of a cylindrical body revolving at high speed: the produced fragments, in their turn, are hurled against two periferal anvils, armoured by special wear-resistant steel plates, which are causing a further comminution.

The inclination of the anvils is adjustable in order to allow to enlarge or to reduce the opening for the passing materials, thus forcing more or less strongly the crushing process and shaping the products as cubical as possible. Furthemore, the anvils being pivoting around their own supports, they are allowing a way out to any uncrushable junk occasionally entrapped into the crushing chamber. By virtue of this operational principle it is possible to reach very high reduction ratios (1:10 and even more), with evident economic benefits in terms of capital investment.

Being conceived as primary crushers, the “PK” line units are not equipped with the sizing grate and, therefore, the outgoing material does not avail of a given size on its own: a proper recycling closed loop may solve the problem. These crushers can not be used for processing wet or soft materials (like wood, plastic, rubber, clay or similar), nor highly abrasive materials, because in the latter case the cost of the resulting wears might not be economically justified.

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PK Primary Impact Breakers