Waste shredder comprising at least two rotors

Abstract

A waste shredder (1) is described, comprising at least one loading chamber (3), two or more rotors (4) placed in seats formed in the bottom wall of the loading chamber (3) and a movable hopper (2) sliding above the loading chamber (3) and provided with a reciprocating translational movement. The hopper (2) has two end walls (B, B') and carries a plurality of stiff vanes (5) placed in the spaces between the rotors (4), the end walls (B, B1) and the stiff vanes (5) protruding downward until they skim the bottom of the loading chamber (3) to press the material (8) to be shredded against the rotors (4). The rotors (4) turn in the opposite direction to the translational movement of the hopper (2) and reverse their direction of rotation when the hopper (2) reverses its direction of translation.

Description

technical field [0001] The present invention relates to a shredder for waste products (such as garbage, industrial waste, recyclable materials, etc.), comprising: [0002] - support members with feeding chambers; [0003] - two or more carrying tool rotors arranged on seats formed on the bottom wall of the charging chamber; [0004] - a movable funnel that slides on the charging chamber and performs a reciprocating translational movement, the funnel has two end walls and carries a plurality of rigid blades located in the space between the rotors: the two end walls and the rigid blades protrude downwards , until they touch the bottom of the feeding chamber, pressing the material to be crushed into the rotor. [0005] The rotor rotates in the opposite direction to the translational movement of the funnel, and when the translational direction of the funnel movement is reversed, its rotation direction is reversed, that is, when the funnel is translated in one direction (for exam...

AI Technical Summary

Problems solved by technology

[0009] However, this type of machine has such limitations that when repairs or maintenance have to be carried out (which is usually very frequent due to the type of work being done), since it is necessary to make the entire crushing line, usually a non-negligible stage, cannot be carried out production operations, each of which is economically and practically expensive

[0010] In particular, in order to ensure the necessary high productivity, existing machines include a rotor with a large diameter and length, which has a large moment of inertia and can therefore be easily broken by hard, unbroken foreign matter ( prone to debris) engages the cutting edge of the rotor, forcing the rotor to stop immediately and causing the cutting tool to be frequently broken or damaged

[0011] In many cases, in order to avoid unacceptable interruption of operations, a spare machine is used to replace the machine that needs to be repaired or maintained, but greatly increases the initial investment cost

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