Tramp metal separation device

• US 5,188,239 A
• Filed: 06/17/1991
• Issued: 02/23/1993
• Est. Priority Date: 06/17/1991
• Status: Expired due to Fees

• Current Assignee: Industrial Magnetics, Inc. (IMI Holding Corp.)
• Original Assignee: Industrial Magnetics, Inc. (IMI Holding Corp.)
• Inventors: Stowe, Michael W.
• Primary Examiner(s): Valenza, Joseph E.
• Application Number:
  US07/716,049
• Time in Patent Office: 617 Days
• Field of Search: 209/217, 209/223.1, 209/228, 209/229, 209/231, 209/636, 210/222, 210/223, 277/228
• US Class Current: 209/223.1
• CPC Class Codes: B03C 1/284 with associated cleaning means, e.g. retractable non-magnetic sleeve

Abstract

A tramp metal separation device adapted to be removably inserted into a housing which directs pelletized raw material to an industrial machine and to separate tramp metal contaminants therefrom. A drawer frame having an outer face plate with a plurality of openings disposed therethrough is adapted to be removably inserted into the housing. A plurality of cylindrical magnets adapted to be inserted through the plurality of openings in the outer face plate are secured to a drawer plate. In one embodiment of the present invention, the at least one silicon-based O-ring disposed in a groove in on of the plates so as to form an air tight seal between the face plate and the magnetic drawer. Additionally, a plurality of silicon-based O-rings may be disposed in grooves on the inner surface of the openings so as to form a wiper mechanism to aid in removing particles from the magnets.

Claims

1. An improved removable tramp metal separation device adapted to be removably inserted through a side opening of a housing which directs granular raw material therethrough and to separate tramp metal contaminants therefrom, the improvement comprising said device being formed of a drawer frame having wiper means and a magnet unit, slidably interconnected such that upon removal of the device from the housing the drawer frame can slide relative to the magnet unit to wipe tramp metal from the surface thereof.

2. The device of claim 1, wherein said drawer frame including an outer face plate having a plurality of openings therein;

and

said magnet unit is formed from a plurality of cylindrical magnets secured to a drawer plate so as to extend substantially perpendicularly away from one side of said drawer plate, said plurality of cylindrical magnets being adapted to be inserted through said plurality of openings in said outer face plate.

3. The device of claim 2, wherein said wiper means comprises a plurality of silicon-based O-rings corresponding in number to said plurality of openings in said face plate are disposed in a respective groove on the surface of said openings in said face plate so that said magnet unit can slidably engage said drawer frame such that upon removal of the device from the housing, the drawer frame can slide relative to the magnet unit to wipe tramp metal from the surface thereof.

4. A removable tramp metal separation device adapted to be removably inserted into a housing which directs granular raw material therethrough and to separate tramp metal contaminants therefrom, comprising:

a drawer frame adapted to be removably inserted into said housing, said drawer frame including an outer face plate having a plurality of openings therein;

a magnet unit formed from a plurality of cylindrical magnets secured to a drawer plate so as to extend substantially perpendicularly away from one side of said drawer plate, said plurality of cylindrical magnets being adapted to be inserted through said plurality of openings in said outer face plate; and

a plurality of silicon-based O-rings corresponding in number to said plurality of openings in said face plate are disposed in a respective groove on the surface of said openings so that said magnet unit can slidably engage said drawer frame such that upon removal of the device from the housing, the drawer frame can slide relative to the magnet unit to wipe tramp metal from the surface thereof.

5. The device of claim 4, wherein said magnets are at least partially formed from a ceramic material.

6. The device of claim 4, wherein said magnets are at least partially formed from a alnico material.

7. The device of claim 4, wherein said magnets are at least partially formed from a rare earth neodymium material.

8. The device of claim 4, wherein said magnets are formed of a magnetic material pressed into a hollow cylindrical stainless steel casing.

9. The device of claim 4, wherein said face plate and said drawer plate are at least partially formed of a transparent material.

10. A tramp metal separation device for use separating tramp metal contaminants from pelletized raw material in industrial machines, comprising:

a housing adapted to receive pelletized plastic material and direct said pelletized material on to an industrial fabrication machine;

a drawer frame adapted to be removably inserted into said housing, said drawer frame including an outer face plate having a plurality of openings therein, the surface of each of said openings having a groove disposed therein;

a silicon-based gasket operative to provide an air tight seal between said drawer frame and said housing when said device is assembled;

a plurality of silicon-based O-rings corresponding in number to said plurality of openings, each of said O-rings being disposed in the groove of one of said openings;

a drawer plate; and

a plurality of cylindrical magnets corresponding in number to said plurality of openings in said outer face plate of said drawer frame and secured to said drawer plate so as to be positioned apart from one another and extend substantially perpendicularly away from one side of said drawer plate, said plurality of cylindrical magnets being adapted to be inserted through said plurality of openings in said outer face plate of said drawer frame into said housing when said drawer frame is inserted into said housing,

whereby said gasket provides an air tight seal between said drawer frame and said housing when said device is assembled, said O-rings are operative to form a substantially air-tight seal about said plurality of magnets when said drawer frame is inserted into said housing, said plurality of magnets are adapted to retain tramp metal contaminants in the raw material passing through the housing when said drawer frame is inserted into said housing, and said drawer plate may be moved away from said face plate when said drawer frame is removed from said housing to move said plurality of magnets relative said face plate to remove tramp metal contaminants from said magnets.

11. The device of claim 10, wherein said magnets are at least partially formed from a ceramic material.

12. The device of claim 10, wherein said magnets are at least partially formed from a alnico material.

13. The device of claim 10, wherein said magnets are at least partially formed from a rare earth neodymium material.

14. The device of claim 10, wherein said face plate and said drawer plate are at least partially formed of a transparent material.

15. The device of claim 10, wherein said gasket is disposed in a groove in said housing.

16. The device of claim 10, wherein said gasket is disposed in a groove on said face plate.