Solid material comminution or disintegration – Apparatus – Comminuting elements
Patent
1977-02-22
1978-09-26
Larson, Lowell A.
Solid material comminution or disintegration
Apparatus
Comminuting elements
76101A, 29460, 407 54, B02C 712
Patent
active
041163923
ABSTRACT:
A pulp refining disk composed of an annular base and sets of radially oriented, tempered knife blades projecting from the base is formed by fabricating a model of the disk of wood or other soft material having the same profile as the intended finished disk, including projecting vanes corresponding to the blades in the finished disk. Then the disk model is pressed upside down into molding material to form a negative image of the disk model. Following removal of the model from the mold, tempered blades are placed cutting-edge-down into the slots formed in the mold by the vanes in the disk model, the blades being taller than the slots so that their back edges project somewhat into the part of the mold formed by the model base. Then one or more circular rings are positioned in the mold on the projecting back edges of the blades, concentric with the circular array of blades. Finally, a settable liquid is poured into the mold which flows around the back edges of the blades and around the rings so that when the material sets, there is formed solid annular blades projecting from the disk. The material sets at a temperature sufficiently low that the blades do not lose their temper.
REFERENCES:
patent: 1090533 (1914-03-01), Heinkel
patent: 1532040 (1925-03-01), Conradson
patent: 1834750 (1931-12-01), Trembour et al.
patent: 2036656 (1936-04-01), Stowell et al.
patent: 2278958 (1942-04-01), White et al.
patent: 3574914 (1971-04-01), Carter
Inox Industria E Comercio de Aco S/A
Larson Lowell A.
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