Equal sized spherical beads

• US 8,256,091 B2
• Filed: 07/30/2008
• Issued: 09/04/2012
• Est. Priority Date: 11/17/2000
• Status: Active Grant

• Current Assignee: Wayne O. Duescher
• Original Assignee: Wayne O. Duescher
• Inventors: Duescher, Wayne O.
• Primary Examiner(s): Banks, Derris
• Assistant Examiner(s): PARVEZ, AZM A
• Application Number:
  US12/221,265
• Publication Number:
  US 20080299875A1
• Time in Patent Office: 1,497 Days
• Field of Search: 295/271, 295/272, 264/12, 264/11, 264/13, 264/15, 451/527, 451/56, 65/211, 65/214
• US Class Current: 29/527.2
• CPC Class Codes: B24D 18/00 Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
• CPC Class Codes: Y10T 29/4998 Combined manufacture including applying or shaping of fluent material
• CPC Class Codes: Y10T 29/49982 Coating

Abstract

A method of producing equal-sized spherical shaped beads of a wide range of materials is described. These beads are produced by forming the parent bead material into a liquid solution and by filling equal volume cells in a sheet with the liquid solution. The sheet cells establish the volumes of each of the cell mixture volumes which are then ejected from the cells by an impinging fluid. Surface tension forces acting on the ejected equal sized solution entities form them into spherical beads. The ejected beads are then subjected to a solidification environment which solidifies the spherical beads. The beads can be solid or porous or hollow and can also have bead coatings of multiple material layers.

Claims

1. A process of making uniform sized spherical beads comprising:

a) providing a cell sheet having an array of cell sheet through holes;

i) the cell sheet through holes each have equal cross sectional areas;

ii) the cell sheet having a nominal thickness wherein the cell sheet nominal thickness is equal at each cell sheet through hole location;

b) mixing at least two distinct materials into a liquid medium that is hardenable or solidifiable, the liquid medium comprising;

at least one i) inorganic molecules, organic materials, metals, and at least one ii) a liquid carrier;

c) filling the cell sheet through holes with the liquid medium to form liquid medium volumes wherein the volume of the liquid medium contained in each liquid medium volume is approximately equal to respective cell sheet cell volumes;

d) ejecting the liquid medium volumes from the cell sheet by subjecting the liquid medium volume contained in each cell to an impinging fluid wherein impact of the impinging fluid dislodges the liquid medium, volumes from the cell sheet thereby forming independent liquid medium entities;

e) shaping the ejected independent liquid medium entities into independent liquid medium spherical entities by at least surface tension forces acting on the liquid medium lump entities; and

f) introducing the independent spherical liquid medium entities into a solidification environment to at least solidify the surface of the independent spherical liquid medium entities to form independent, uniform sized spherical beads.

2. The process of claim 1 wherein at least one of the at least two distinct materials is selected from the group consisting of microbes, pharmaceuticals, vitamins, seeds, agricultural nutrients, antiseptics, reagents, fertilizers, herbicides and pesticides.

3. The process of claim 1 wherein the spherical beads are porous.

4. The process of claim 3 wherein the porous spherical beads are saturated with or act as carriers for materials selected from the group consisting of pharmaceuticals, vitamins, nutrients, seeds, herbicides, pesticides and fertilizers.

5. The process of claim 1 wherein the solidification environment comprises elevated temperature gas.

6. The process of claim 1 wherein the solidification environment is a dehydrating liquid.

7. The process of claim 1 wherein the cell sheet is a woven wire mesh screen.

8. The process of claim 7 wherein the woven wire mesh screen cell sheet is reduced in thickness by compressive force before the introduction of the liquid mediums.

9. The process of claim 1 wherein the cell sheet forms a continuous belt.

10. The process of claim 1 wherein the cell sheet comprises a disk shape having an annular pattern of cell sheet through holes.

11. The process of claim 1 where at least one component of the mixed liquid comprises an inorganic oxide material.

12. The process of claim 1 where the spherical beads are fired at high temperatures to produce beads.

13. The process of claim 1 where the standard deviation of the average diameter size of the spherical beads is less than 30% of the average bead diameter size.

14. The process of claim 1 where the standard deviation of the average diameter size of the spherical beads is less than 20% of the average bead diameter size.

15. The process of claim 1 where the standard deviation of the average diameter size of the spherical beads is less than 10% of the average bead diameter size.

16. A process of making uniform sized spherical beads comprising:

a) providing a cell sheet having an array of cell sheet through holes;

i) the cell sheet through holes each have equal cross sectional areas;

ii) the cell sheet having a nominal thickness wherein the cell sheet nominal thickness is equal at each cell sheet through hole location;

b) mixing at least two distinct materials into a liquid medium that is hardenable or solidifiable, the liquid medium comprising;

at least one i) inorganic molecules, organic materials, metals, and at least one ii) a liquid carrier;

c) filling the cell sheet through holes with the liquid medium to form liquid medium volumes wherein the volume of the liquid medium contained in each liquid medium volume is approximately equal to respective cell sheet cell volumes;

d) ejecting the liquid medium volumes from the cell sheet by subjecting the liquid medium volume contained in each cell to an impinging fluid wherein impact of the impinging fluid dislodges the liquid medium, volumes from the cell sheet thereby forming independent liquid medium entities;

e) shaping the ejected independent liquid medium entities into independent liquid medium spherical entities by at least surface tension forces acting on the liquid medium lump entities; and

f) introducing the independent spherical liquid entities into a cooling solidification environment and cooling the independent spherical liquid medium entities to at least solidify their surfaces to form independent uniform sized spherical beads.

17. A process of making uniform sized spherical beads comprising:

a) providing a cell sheet having an array of cell sheet through holes;

i) the cell sheet through holes each have equal cross sectional areas;

ii) the cell sheet having a nominal thickness wherein the cell sheet nominal thickness is equal at each cell sheet through hole location;

b) mixing at least two distinct materials into a liquid medium that is hardenable or solidifiable, the liquid medium comprising;

at least one i) inorganic molecules, organic materials, metals, and at least one ii) a liquid carrier;

c) filling the cell sheet through holes with the liquid medium to form liquid medium volumes wherein the volume of the liquid medium contained in each liquid medium volume is approximately equal to respective cell sheet cell volumes;

d) ejecting the liquid medium volumes from the cell sheet by subjecting the liquid medium volume contained in each cell to an impinging fluid wherein impact of the impinging fluid dislodges the liquid medium, volumes from the cell sheet thereby forming independent liquid medium entities;

e) shaping the ejected independent liquid medium entities into independent liquid medium spherical entities by at least surface tension forces acting on the liquid medium lump entities; and

f) introducing the independent spherical liquid entities into to a solidification environment wherein the independent spherical liquid entities become solidified by a polymerization process to form independent, uniform sized spherical beads.

18. The process of claim 17 wherein the ejected spherical beads are suspended in space while the ejected spherical beads are in residence in the solidification environment.

19. The process of claim 17 wherein the solidification environment comprises heat, electron beam, light sources, ultraviolet light, infrared sources, microwaves or ultrasonic sources.

20. A process of making equal sized hollow spherical beads comprising:

A process of making uniform sized spherical beads comprising;

a) providing a cell sheet having an array of cell sheet through holes;

i) the cell sheet through holes each have equal cross sectional areas;

ii) the cell sheet having a nominal thickness wherein the cell sheet nominal thickness is equal at each cell sheet through hole location;

b) mixing at least two distinct materials into a liquid medium that is hardenable or solidifiable, the liquid medium comprising;

at least one i) inorganic molecules, organic materials, metals, and at least one ii) a liquid carrier;

c) filling the cell sheet through holes with the liquid medium to form liquid medium volumes wherein the volume of the liquid medium contained in each liquid medium volume is approximately equal to respective cell sheet cell volumes;

d) ejecting the liquid medium volumes from the cell sheet by subjecting the liquid medium volume contained in each cell to an impinging fluid wherein impact of the impinging fluid dislodges the liquid medium, volumes from the cell sheet thereby forming independent liquid medium entities;

e) shaping the ejected independent liquid medium entities into independent liquid medium spherical entities by at least surface tension forces acting on the liquid medium lump entities;

f) introducing the independent spherical liquid entities into bead-blowing environment, generating bead blowing gas within the liquid medium entities wherein gases form at the interior portion of the spherical liquid entities with the result that portions of the mixture materials form a mixture material shell about the gases; and

g) the independent spherical liquid entities are introduced into and subjected to a solidification environment wherein the independent spherical liquid entities become solidified to form independent hollow mixture equal sized spherical beads.

21. The process of claim 20 wherein the hollow bead materials comprise ceramics or oxides and are fired at high temperatures.

22. The process of claim 20 wherein the hollow bead materials are coated with light or other reflective materials.

23. The process of claim 20 wherein the hollow bead materials are porous.

24. The process of claim 20 wherein the hollow beads are filled with gases or liquid materials.

25. A process of making uniform sized spherical beads comprising:

a) providing a cell sheet having an array of cell sheet through holes;

i) the cell sheet through holes each have equal cross sectional areas;

ii) the cell sheet having a nominal thickness wherein the cell sheet nominal thickness is equal at each cell sheet through hole location;

b) mixing at least two distinct materials into a liquid medium that is hardenable or solidifiable, the liquid medium comprising;

at least one i) inorganic molecules, organic materials, metals, and at least one ii) a liquid carrier;

c) filling the cell sheet through holes with the liquid medium to form liquid medium volumes wherein the volume of the liquid medium contained in each liquid medium volume is approximately equal to respective cell sheet cell volumes;

d) ejecting the liquid medium volumes from the cell sheet by subjecting the liquid medium volume contained in each cell to an impinging fluid wherein impact of the impinging fluid dislodges the liquid medium, volumes from the cell sheet thereby forming independent liquid medium entities;

e) shaping the ejected independent liquid medium entities into independent liquid medium spherical entities by at least surface tension forces acting on the liquid medium lump entities; and

f) the independent spherical liquid entities are introduced into and subjected to a solidification environment wherein the independent spherical liquid entities become solidified to form independent mixture equal sized spherical beads; and

g) coating the independent spherical liquid beads with one or more coating layers of coating material.