Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Patent
1984-11-02
1987-08-25
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
241 66, 2412593, 241260, 2412611, 241290, B02C 434
Patent
active
046887270
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for fine grinding of material samples, especially mineral samples for laboratory experiments, and has a fixed grinding member and a rotating grinding member, which are disposed in such a way that a surface of each faces the other with a slight gap therebetween, with the material which is to be ground being received and passed between these surfaces.
2. Description of the Prior Art
Known fine grinding apparatuses having these features are the so-called grinding arrangements according to which the material is ground between two disk-like grinding members. The disks are either disposed horizontally or vertically, so that the axis of rotation of the rotating disks extends either vertically or horizontally. Among the oldest embodiments of such grinding arrangements are flour mills having grinding stones.
The grinding arrangements of the previously described state of the art are generally designed for production purposes and have a corresponding size. Due to the circular-disk-shaped chamber in which the material is ground, the introduction of the unprocessed material and the discharge of the fine material as such do not cause any particular difficulties; however, a differentiated control of the time the material can be retained in the grinding zone, and hence the possibility for achieving a wide range of the grinding degree, either cannot be achieved at all, or can only be achieved imprecisely. However, it is exactly these requirements which are required of fine grinding apparatus for laboratory experiments, where it is important to be able to explore or study series of many different samples under various conditions.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an apparatus for fine grinding of material samples, especially mineral samples for laboratory experiments, which in principle makes use of the aforementioned type of features, and at the same time can be utilized for relatively soft, hard, and even very hard materials. The apparatus should be able to operate continuously, and the granular size of the discharged material which can be achieved with this grinding apparatus should be able to be adjusted over a very wide range. It is also an object to meet the requirement of a compact manner of construction for adaptation to the space conditions in laboratories, as well as to provide a construction which protects from dust.
The apparatus of the present invention is characterized primarily in that the grinding members are constructed on the one hand as a cylindrical body which is fixed against rotation, and on the other hand as a roller body which rotates coaxially therein; a small annular gap, preferably in the order of magnitude of half of a millimeter, remains between the two grinding bodies; the material which is to be ground is conveyed between this annular gap from an introducing means on one end face of the roller body to a discharge means on the other end face of the roller body, for which purpose appropriate devices are provided; the apparatus is further characterized in that the housing which surrounds the cylindrical body is mounted on relatively resilient bearing blocks in such a way that the lower half of the inner surface of the cylindrical body is pushed upwardly against the lower half of the outer surface of the roller body.
Pursuant to specific features of the present invention the resilient bearing blocks may essentially be formed by respective compression springs. The degree of resilience of the bearing blocks for the cylindrical body of the grinding apparatus may be adapted to be adjustable by means of a hand grip.
The common central longitudinal axis of the two grinding members may be basically horizontal and may be pivotable by suitable means through numerous inclined positions up to an essentially vertical position. The housing, together with its grinding members and the drive unit, may be mounted on a chassis or support means which can be pivoted by means
REFERENCES:
patent: 35036 (1862-04-01), Palmer
patent: 3151817 (1964-10-01), Bond et al.
patent: 3154257 (1964-10-01), Wooten
patent: 3570775 (1971-03-01), Stavely
patent: 3622086 (1971-11-01), Yamagishi
patent: 4067503 (1978-01-01), Broman
patent: 4307846 (1981-12-01), Spelsberg
patent: 4373674 (1983-02-01), Barrera et al.
European Patent Application, 40182, 11-1981.
Artisan Industries Inc., Brochure 12-1947, Bulletin No. 4001.
F. Kurt Retsch GmbH & Co. KG
Rosenbaum Mark
LandOfFree
Fine grinding apparatus for laboratory experiments does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fine grinding apparatus for laboratory experiments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fine grinding apparatus for laboratory experiments will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1918628