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US 4,343,347 AGranted
Method of making patterned helical metallic ribbon for continuous edge winding applications
AssigneeGeneral Electric Company
InventorsHoward H. Liebermann, Peter G. Frischmann, George M. Rosenberry, Jr.
Life of this patent
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Abstract
Metallic ribbon having cutout patterns therein is fabricated in continuous helical form by directing a melt stream or jet onto a rapidly moving patterned substrate surface.
Claims13
A method of casting patterned metallic ribbons in helical form by chill block melt-spinning including the process steps of:
- a. providing a substrate wheel, said wheel having major opposed top and bottom surfaces and a peripheral edge surface area interconnecting said major surfaces, said top surface lying normal to the axis of rotation of said wheel and being a casting surface;
- b. providing a predetermined pattern on said casting surface forming thereby a patterned casting region, said pattern being delineated by means of barrier lines;
- c. rotating said substrate wheel at a predetermined speed to impart to said patterned casting region a predetermined surface velocity;
- d. positioning a crucible with respect to the moving patterned casting region with the orientation of the longitudinal axis of said crucible with respect to said patterned casting region being defined by the inclination angle .alpha. and azimuthal angle .gamma.;
- e. forming molten alloy of a predetermined composition in said crucible;
- f. ejecting said molten alloy through an orifice in said crucible to form a melt stream having a preferred velocity, said orifice and said melt stream having axes substantially colinear with the axis of said crucible;
- g. impinging said melt stream onto said moving patterned casting region;
- and
- h. rapidly chilling said molten alloy impinging on said moving patterned casting region to form a continuous length of metallic ribbon edge-wound in a helical shape, said ribbon having a substantially uniform cross section, a pair of substantially parallel major surfaces, a pattern of cutouts therein corresponding to said predetermined pattern on said casting surface, and inner and outer peripheral edges of constant radii defined by the motion of said patterned casting region at the locus of impingement of said melt stream thereon.
6 more elements
A method of casting nested patterned metallic ribbons in helical form by chill block melt-spinning including the process steps of:
- a. providing a substrate wheel, said wheel having major opposed top and bottom surfaces and a peripheral edge surface area interconnecting said major surfaces, said top surface lying normal to the axis of rotation of said wheel, said wheel having a casting surface thereon, said casting surface being contiguous with at least said top surface and being the lateral area of the frustrum of a right circular cone, the axis of said right circular cone being substantially coincident with said axis of rotation with the apex of said right circular cone being above said top surface;
- b. providing a predetermined pattern on said casting surface forming thereby a patterned casting region, said pattern being delineated by means of barrier lines;
- c. rotating said substrate wheel at a predetermined speed to impart to said patterned casting region a predetermined surface velocity;
- d. positioning a crucible with respect to the moving patterned casting region with the orientation of the longitudinal axis of said crucible with respect to said patterned casting region being defined by the inclination angle .alpha. and the azimuthal angle .gamma.;
- e. forming molten alloy of a predetermined composition in said crucible;
- f. ejecting said molten alloy through an orifice in said crucible to form a melt stream having a preferred velocity, said orifice and said melt stream having axes substantially colinear with the axis of said crucible;
- g. impinging said melt jet stream onto said moving patterned casting region;
- and
- h. rapidly chilling said molten alloy impinging on said moving patterned casting region to form a continuous length of nested patterned metallic ribbon edge-wound in a helical shape, said ribbon having a substantially uniform cross section, a pair of substantially parallel major surfaces, a pattern of cutouts therein corresponding to said predetermined pattern on said casting surface, and inner and outer peripheral edges of constant radii defined by the motion of said patterned casting region at the locus of impingement of said melt stream thereon, said ribbon leaving said moving patterned casting region with said substantially parallel major surfaces inclined away from the central axis of the helical coil.
6 more elements
A method of casting nested patterned metallic ribbons in helical form by chill block melt-spinning including the process steps of:
- a. providing a substrate wheel, said wheel having major opposed top and bottom surfaces and a peripheral edge surface interconnecting said major surfaces, said top surface lying normal to the axis of rotation of said wheel, said wheel having a casting surface thereon, said casting surface being contiguous with at least said top surface and being the lateral area of the frustrum of a right circular cone, the axis of said right circular cone being substantially coincident with said axis of rotation with the apex of said right circular cone being below said top surface;
- b. providing a predetermined pattern on said casting surface forming thereby a patterned casting region, said pattern being delineated by means of barrier lines;
- c. rotating said substrate wheel at a predetermined speed to impart to said patterned casting region a predetermined surface velocity;
- d. positioning a crucible with respect to the moving patterned casting region with the orientation of the longitudinal axis of said crucible with respect to said patterned casting region being defined by the inclination angle .alpha. and the azimuthal angle .gamma.;
- e. forming molten alloy of a predetermined composition in said crucible;
- f. ejecting said molten alloy through an orifice in said crucible to form a melt stream having a preferred velocity, said orifice and said melt stream having axes substantially colinear with the axis of said crucible;
- g. impinging said melt jet stream onto said moving patterned casting region;
- and
- h. rapidly chilling said molten alloy impinging on said moving patterned casting region to form a continuous length of nested patterned metallic ribbon edge-wound in a helical shape, said ribbon having a substantially uniform cross section, a pair of substantially parallel major surfaces, a pattern of cutouts therein corresponding to said predetermined pattern on said casting surface, and inner and outer peripheral edges of constant radii defined by the motion of said patterned casting region at the locus of impingement of said melt stream thereon, said ribbon leaving said moving patterned casting region with said substantially parallel major surfaces inclined toward the central axis of the helical coil.
6 more elements
Dependencies are inferred from the claim text.