Abrading – Machine – Tumbling device
Patent
1996-09-30
1998-07-14
Eley, Timothy V.
Abrading
Machine
Tumbling device
451326, 241 793, B24B 3100, B24B 3102
Patent
active
057795274
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a stone bevelling machine, which, specifically, rounds the corners of stone to, for example, process the stone in such a way as to make it appear natural.
BACKGROUND ART
Popular conventional stone bevelling machines have protruding vanes facing toward the center of and attached to the inner walls of either a polygonal or circular cylinder. Stone is loaded into the cylinder, whereupon the cylinder is made to rotate. The vanes within the cylinder scratch up the stone, causing the stone to either collide with the vanes or with other stones, bevelling the corners by either breaking (chipping) or chafing the stone.
As the above mentioned type of bevelling machine processes stones, however, the stone chips and powder are retained within the cylinder during the process, creating a kind of cushion that absorbs and weakens the impact between the stones and the vanes or other stones. The longer a bevelling operation is carried out, the lower the processing efficiency becomes, rendering processing time unpredictable. Productivity is further lowered, because additional work is required to separate the stones from the chips and powder after bevelling.
The object of this invention is to resolve the above mentioned problems, by offering a stone bevelling machine that improves and stabilizes processing efficiency and makes possible excellent productivity.
SUMMARY OF THE INVENTION
To achieve the object of this invention, the bevelling machine of this invention has vanes mounted inside a rotating polygonal cylinder and has a charge port on one side and a discharge port on the other side, with a size-regulator gate located between these two ports.
More specifically the invention provides a bevelling machine equipped with a cylinder, a partition, and feeder vanes. The cylinder of the bevelling machine has a charge port on one end and a discharge port on the other end. The partition separates the space within the cylinder into a charge port side zone and a discharge port side zone and has a size-regulator gate that selectively allows only stones of a specified diameter or smaller to pass through the partition. There are a multiplicity of feeder vanes fixed at least to inner walls of the charge port side zone, protruding inwardly.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1A and 1B show an embodiment of the stone bevelling machine of this invention, with FIG. 1A being a vertical cross-section along the rotational axis and FIG. 1B being a cross-sectional view taken along the line 1B--1B of FIG. 1A;
FIG. 2 is a partially broken front view of an embodiment of the bevelling machine of this invention;
FIG. 3 is a side view from the left side of the machine of FIG. 2;
FIGS. 4A and B show the liners that are structural components of the cylinder of the machine of FIG. 2, with FIG. 4A being a front view and FIG. 4B a right-side view;
FIG. 5 is a partial diagonal view of the inner part of the machine of FIG. 2, when the charge-port door has been opened;
FIGS. 6A and B show the size-regulator gate in the partition of the machine of FIG. 2, with FIG. 6A being a front view and FIG. 6B a cross-sectional view taken along the line 6B--6B of FIG. 6A;
FIGS. 7A, 7B and 7C are diagrams showing stones prior to and after processing with the bevelling machine of this invention;
FIG. 8 is an axial sectional drawing showing a trommel that has been applied to the bevelling machine of this invention;
FIG. 9 is a diagonal view of the trommel of FIG. 8 as viewed from the right side; and
FIG. 10 is a diagonal view of the trommel of FIG. 8 as viewed from the left side.
DETAILED DESCRIPTION OF THE INVENTION
The operation of this invention will be explained in conjunction with FIGS. 1A and B. FIGS. 1A and 1B show a stone bevelling machine of this invention as a model, with 1A being a vertical cross-section along the rotational axis and (B) being a cross-section along the line 1B--1B of FIG. 1A.
In FIGS. 1A and B, the stone bevelling machine 1 is comprised of the hexagonal cylinder 2 rotated by a drive source (n
REFERENCES:
Form PCT/ISA/210 for PCT/JP95/00551.
Eley Timothy V.
Maehashi Industries Co., Ltd.
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