Air-cooled rotary disc and mill assembly for pulverizers

Abstract

The invention discloses a pulverizer with an air-cooled cutting disc. The air cooling disc has cutting surfaces on both sides. The cutting surface has an edge that is sharpened to cut input material when the cutting surface faces the cutting surface of the opposing disc. When the cutting surface of the fixed disk faces the housing, the cutting surface acts as a heat sink to cool the fixed disk and the milling assembly with normal air. Air inlets in the housing cover allow air to flow over the cooling surfaces of the mounting plate. Air inlets in the carrier plate allow the carrier plate to direct air flow over the rotating cooling surface. Snubbers restrict air flow across air-cooled surfaces to control the temperature of the shredder, for example during start-up.

Description

technical field [0001] The present invention relates to the field of pulverizers, especially pulverizers. More particularly, the present invention relates to rotating disks and disk refiner assemblies for use in such machines. Background technique [0002] In the past, pulverizers including milling systems have used disc mill assemblies to grind, grind or pulverize various types of materials such as plastics, nylon, polyester and other polymers into powders and other industrial applications. Typically, shredders have cooperating cutting discs with opposing cutting surfaces. Usually, one cutting disc is fixed, often called a stationary disc, and one cutting disc is rotating, usually called a rotary disc. The input material to be shredded is passed between the cutting surfaces of the discs radially from the center to the circumference of the discs by centrifugal force, usually assisted by a vacuum created by a fan that is part of the shredder. [0003] A major issue with sh...

AI Technical Summary

Problems solved by technology

In other cases, the air cannot be efficiently channeled through the rotating disc even though it may be exposed to the air

Additionally, prior art devices can recirculate heated air within the disc cavity, reducing cooling efficiency

[0011] Additionally, heat generation is the limiting factor for most shredders

Increased heat generation limits productivity and conversely, increased heat dissipation increases productivity

Additionally, increased heat generation limits the types of materials that can be shredded

[0012] Thus, prior art pulverizers have several disadvantages related to the manner in which the milling assembly, in particular the fixed and rotating discs, are cooled

Furthermore, the cooling method of the milling assembly, especially of the fixed discs according to prior art assemblies increases the cost of manufacture, assembly and operation and also limits the properties of the material used for the discs

Images