Method and apparatus for recycling sand
AssigneeSintokogio, Ltd.
InventorsOsamu Masuno, Kazuharu Matsui, Takehiko Matsumoto
Life of this patent
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Abstract
An apparatus to remove adhering material from the surfaces of sand to recycle the sand is disclosed. The apparatus includes a container (13) to hold sand (S) to be processed, the container having a bottom opening; pressing means (17-20) to press the sand in the container downwards; a rotor (10) disposed under the bottom opening of the container (13), the rotor (10) having a surface (11) that contacts the sand in the container; means (2) for driving the rotor (10); and a gap (G) disposed near a place between the container and the rotor. The sand contacts and is abraded by the rotary surface (11 ) of the rotor (10), and the processed sand is discharged by the centrifugal force of the rotor (10) from the gap (G) onto a chute (21).
Claims12
An apparatus to remove adhering material from the surfaces of used sand to recycle the used sand, comprising:
- a container for holding used sand, the container having a bottom opening;
- pressing means for pressing the used sand in the container downwards;
- a rotor disposed under the bottom opening of the container, the rotor having a surface which contacts the used sand in the container, wherein the rotor has an open cavity for containing used sand, and the rotor surface, which contacts the used sand in the container, is itself a surface of used sand in the rotor;
- means for driving the rotor;
- and
- a gap disposed adjacent to the rotor surface so as to discharge processed sand.
An apparatus for removing adhering material from the surface of sand, comprising:
- a container into which the sand may be placed having a bottom opening;
- pressing means for pressing the sand which was placed in the container downwards;
- a rotor disposed under the bottom opening of the container,
- said rotor further having an open cavity in which sand may be contained,
- wherein the open cavity is shaped such that sand contained in the open cavity of the rotor contacts the sand in the container;
- means for driving the rotor;
- and
- a gap disposed adjacent to the rotor surface so as to allow for the discharge of sand which has been processed by the apparatus.
An apparatus for removing adhering material from the surface of sand, comprising:
- a container into which the sand may be placed having a bottom opening;
- pressing means for pressing the sand which was placed in the container downwards including a cylinder provided with a hydraulic circuit having an output;
- a rotor disposed under the bottom opening of the container;
- means for driving the rotor including a motor;
- a detector, which produces a detected value, to detect one of a power level and a current for the motor;
- a pressure control valve to control the output of the hydraulic circuit;
- an input/output controller which is coupled to the detector and the pressure control valve which receives the detected value from the detector as an input signal and transmits an output signal to the pressure control valve which corresponds to a result of calculation such that the detected value becomes a predetermined value;
- and
- a gap disposed adjacent to the rotor surface so as to allow for the discharge of sand which has been processed by the apparatus.
A method for mechanically removing material adhering to surfaces of used sand for recycling the used sand, comprising the steps of:
- arranging a rotor having a surface under a container having a bottom opening, the container holding used sand therein so that the used sand in the container can contact the rotor surface;
- arranging a gap adjacent to the rotor surface;
- feeding used sand to be processed into the container;
- pressing the used sand in the container downwards, and at the same time driving the rotor so as to abrade the used sand by the rotor surface, wherein the rotor surface is a surface of the used sand held in the rotor, thereby removing material adhering to the used sand and discharging processed sand from the gap by a centrifugal force of the rotor.
Dependencies are inferred from the claim text.