Solid material comminution or disintegration – Apparatus – Comminuting elements
Patent
1986-05-20
1988-05-31
Eley, Timothy V.
Solid material comminution or disintegration
Apparatus
Comminuting elements
241195, B02L 1818
Patent
active
047475528
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention concerns a roll grinding blade for the production of starch from starch plants such as potatoes, as well as for the production of processed food or juice such as from root crops, fruits and vegetables.
BACKGROUND ART
Conventional trigonal cone- and saw teeth-like roll grinding blades have a drawback that the product recovery rate is lowered as the grinding efficiency is increased.
That is, the roll grinding blades for the production of sweet potato starch have trigonal cone-like blade elements sets to a rotational roll made of highly soft steels, in which the best starch recovery rate is obtainable when the easily abrading blade elements are abraded such that the crests of the trigonal cones are abraded by about one-half into a trapezoidal shape. However, the blade elements abraded to the trapezoidal shape involve a defect that not only the grinding efficiency is reduced but also they fail to perform complete grinding, for example, by yielding chips, i.e., waste pieces of potatoes, thus requiring re-grinding by a grinder.
There has been a roll grinding machine for the production of Irish potato starch having saw teeth-like grinding blades which can detachably be mounted to a roll but, since the saw teeth-like shape undergoes a great resistance and requires abrasion, it has a defect that the detaching and attaching device to the roll is complicated to increase the cost and that it cannot be utilized for the production of sweet potato starch because of the low product recovery rate.
Grinding of root crops, fruits, vegetables, etc. by a grinder for the production of processed food or juice therefrom involves a demerit of poor fabrication efficiency.
The cutter of a juicer also has a defect that the blade elements, being of a trigonal cone- or trigonal plate-like shape, are not satisfactorily bite into the material to be processed and are abraded rapidly.
The rotational blade shown in Japanese Patent Application No. Sho 59-937431 also has a drawback that the grinding efficiency is reduced if the starch recovery rate is increased.
That is, all of the conventional grinding blades have a conflicting relationship between the product recovery rate and the grinding efficiency. Therefore, they are defective in that the grinding efficiency can not be improved.
The conflicting relationship between the product recovery rate and the grinding efficiency is caused by that all of the blade elements of the conventional grinding blades are mono-layered blades.
The objects of this invention is to overcome the problems in the drawbacks of the conventional mono-layered blades and provide a grinding blade capable of improving the grinding efficiency remarkably without reducing the quality or the recovery rate of products.
DISCLOSURE OF INVENTION
Accordingly, this invention basically concerns a stacked blade which is suitable to the grinding of matters to be processed such as the pulverization of starch cell membranes and formed by stacking protruding plate-like blade members as desired.
Specifically, this is a blade member comprising protruding plate-like blade elements each of a flat and rhombic planar shape and having leading blade tips at the top ends on the left and right sides meeting each other with an acute angle and cutting blade tips at the respective edges thereof where the side surfaces meet the upper and the lower surfaces, which are stacked by an appropriate number as desired.
The roll grinding blade has a feature in that the stacked blade members are arranged at the circumferential surface of a rotational roll with the leading blade tips being directed to the rotating direction, by any method such as of mounting fixedly or detachably to the rotational roll.
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings show an embodiment of the roll grinding blade according to this invention, wherein
FIG. 1 is a front elevational view of the roll grinding blade according to this invention,
FIG. 2 is a side elevational view thereof,
FIG. 3 is an enlarged perspective view of a blade member of
REFERENCES:
patent: 1375862 (1921-04-01), Shelton
patent: 3039505 (1962-06-01), Mast
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