Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1977-02-03
1978-07-04
Custer, Jr., Granville Y.
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241 23, 241 65, B02C 2318
Patent
active
040984630
ABSTRACT:
In a system for comminuting materials containing thermoplastics, the temperature in the comminuting chamber is monitored and a spray of cooling liquid is charged into the cutting chamber when the cutting chamber is at a temperature greater than the boiling temperature of the cooling liquid and less than the melting temperature for the thermoplastic being comminuted. By using heat of vaporization to extract heat from the cutting chamber, the likelihood of the plastic softening and/or melting and clogging the comminuting screen is substantially reduced. A higher throughput of materials is obtained because of material remaining harder. By vaporizing the liquid, the discharged comminuted material may be maintained very dry for later classifying. Preferably, the cooling liquid is discharged intermittently to keep the temperature of the comminuting chamber within predetermined upper and lower temperature limits. The illustrated comminuter comminutes scrap wire and also plastic materials such as vinyl plastic derived from the scrap wire.
REFERENCES:
patent: 1762241 (1930-06-01), Pontoppidan
patent: 2565420 (1951-08-01), Ayers
patent: 3545686 (1970-12-01), Brown
patent: 3815833 (1974-06-01), Vliet et al.
patent: 4000860 (1977-01-01), Gotham
patent: 4015782 (1977-04-01), Granite
Custer, Jr. Granville Y.
Metals & Plastics, Inc.
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