Patent EP0304607A2 successfully refreshed from Google Patents.
EP0304607A2
Expired / Lapsed
EP
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Apparatus for making matrix coatings
Assignee: Hazelett Strip Casting Corp
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Filing: 1984-11-06
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Granted: —
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Expires: 2004-11-06
Abstract
Abstract An apparatus for making fusion-bonded matrix coatings on endless, flexible metallic casting belts for continuous casting machines is described. The fusion-bonded matrix coating comprises a nonmetallic refractory material interspersed substantially uniformly throughout a matrix of heat-resistant metal or metal alloy, for example nickel or nickel alloy. The coating is applied to a revolving belt (10,20) being supported and driven by pulleys (34,36) in a machine by thermally spraying a powdered mixture directly onto the roughened casting surface of the belt. The machine holds the revolving belt under tension and applies cooling to the rear surface of the revolving belt (10,12) opposite to the region where the thermal spray gun (66) is applying the coating to the belt (10,20), and causes the thermal spray gun (66) to traverse uniformly traversely across the belt. The result is to insulate and protect the underlying belt from intimate molten metal contact. The life of the coated belts is dramatically increased, and the surface quality and properties of the cast product are significantly improved.
Inventors
- 👤 Norman J. Bergeron
- 👤 Wojtek S. Szczypiorski
- 👤 James G. Villa
- 👤 S. Richard Hazelett
- 👤 R. William Hazelett
- 👤 Dean A. Boozan
- 👤 Thomas E. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:11
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B05; B05B; B05B13/00; B05B13/02; B05B13/04; B05B13/0463; B05B13/0468; B05B13/0473; B22D11/0637; B22D11/0665; B22D11/0671
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
110 words
A machine for applying an insulative and protective coating on an endless flexible casting belt characterized by: a plurality of spaced circular cylindrical pulley rolls (12,14,28, ,30,34, 36,108,110,112,114) having substantially parallel axes, drive means for rotating at least one of said pulley rolls for revolving a casting belt (10,20) around said pulley rolls, means for tensioning (48,50) the belt revolving around said rolls, means for steering (70) the belt revolving around said rolls, a thermal spray gun (66) and means for supporting (98,90) said gun and for traversing (92,94) said gun back-and-forth relative to said revolving belt (10,20) with said gun aimed at said belt from a predetermined stand-off distance.
Claim 2
Dependent Claim
110 words
A machine for applying an insulative and protective coating on an endless flexible casting belt characterized by: a plurality of spaced circular cylindrical pulley rolls (12,14,28, ,30,34, 36,108,110,112,114) having substantially parallel axes, drive means for rotating at least one of said pulley rolls for revolving a casting belt (10,20) around said pulley rolls, means for tensioning (48,50) the belt revolving around said rolls, means for steering (70) the belt revolving around said rolls, a thermal spray gun (66) and means for supporting (98,90) said gun and for traversing (92,94) said gun back-and-forth relative to said revolving belt (10,20) with said gun aimed at said belt from a predetermined stand-off distance.
Claim 3
Dependent Claim
29 words
The machine as claimed in claim 1, in which: said thermal spray gun (66) is at a stand-off distance of at least 12,7 cm from said revolving belt (10,20).
Claim 4
Dependent Claim
48 words
The machine as claimed in claim 1 or 2, in which: said supporting and traversing means (90,92,94,98) reverses the back-and-forth traversing of said thermal spray gun (66) in the vicinity of the edges of the belt outside of the area which is intended to face the molten metal.
Claim 5
Dependent Claim
94 words
The machine as claimed in any of claims 1 to 3, which: one of said circular cylindrical pulley rolls (12,14, 28,30 ,34,36,108,110,112,114) is a working roll, said thermal spray gun (66) is aimed at said belt (10,20) as said belt travels partially around said working roll, and a continually moistened heat-resistant jacket or sheath of porous or spongy material affixed around the periphery of said working roll for the purpose of retaining a controlled amount of aqueous liquid and thus cooling the reverse surface of said belt in the region of the thermal-spray impingement.
Claim 6
Dependent Claim
84 words
The machine as claimed in any of claims 1 to 4,, in which: one of said circular cylindrical pulley rolls (12,14,28 ,30,34 ,36,108,110,112,114) is a working roll, said thermal spray gun (66) is aimed at said belt (10,20) as said belt travels partially around said working roll, and a continually moistened, stationary fibrous mass (109) extends substantially the width of said casting belt (10,20) and in contact with the reverse side of said belt before said belt comes into contact with said working roll.
Claim 7
Dependent Claim
90 words
The machine as claimed in any of claims 1 to 4, in which: there are at least four circular cylindrical pulley rolls (108, 110 ,112,114), said thermal spray gun (66) is aimed at said casting belt (10,20) as said belt travels between a pair of said pulley rolls, cooling means (116) for cooling the reverse side of the said casting belt opposite the point of thermal-spray impingement, and means (117, 118 ,120,122) for supporting and traversing said cooling means (116) in synchronous opposed alignment with said thermal spray gun (66).
Claim 8
Dependent Claim
80 words
The machine as claimed in any of claims 1 to 6, in which there are at least four circular cylindrical pulley rolls (108,110,112,114), said thermal spray gun (66) is aimed at said casting belt (10,20) as said belt travels between a pair of said pulley rolls, and a cooling mass (109) of continually moistened fibrous material is pressed against the reverse side of said casting belt (10,20) opposite the region of impingement of the thermal spray from said gun (66).
Claim 9
Dependent Claim
41 words
A machine as claimed in claim 6, in which: said cooling means is a nozzle (116) for applying coolant liquid or mist to the inner surface of the belt opposite the region of impingement of the thermal spray from said gun.
Claim 10
Dependent Claim
57 words
A machine as claimed in claim 8, in which: a leadscrew (92) traverses said thermal spray gun (66) transversely with respect to the belt (10,20) another leadscrew (118) traverses said cooling nozzle (116) and said two leadscrews (92,118) are mechanically interconnected for synchronizing the traversing of said nozzle (116) with respect to said thermal spray gun (66).
Claim 11
Dependent Claim
64 words
A machine as claimed in claim 7, in which: a leadscrew (92) traverses said thermal spray gun (66) transversely with respect to the belt (10,20), another leadscrew (118) traverses said mass of moistened fibrous material (109), and said two leadscrews are mechanically interconnected for synchronizing the traverse of said cooling mass (109) of moistened material with the traverse of said thermal spray gun (66).
Claim 12
Dependent Claim
34 words
A machine as claimed in claim 6, 7, or 8, , in which: said cooling means (116) is operatively associated with said drive means for stopping cooling action whenever the drive means is stopped.
Claim 13
Dependent Claim
68 words
A machine as claimed in any of the preceding claims 1 to 11, in which said drive means revolves said belt (10,20) at relatively high speed around said pulley rolls (12,14, 28,30,34 ,36,108,110,112,114), and said traversing means (90,92,94) traverses said thermal spray gun (66) laterally at a relatively slow speed for causing the path of impingement of the thermal spray on said belt (10,20) to be generally helical.
Claim 14
Dependent Claim
72 words
A machine as claimed in any one or more of claims 1 through 12, characterized in that sensing means (196) senses the lateral position of the revolving belt (10,20), and said means (90,92,94) for supporting and traversing said gun back-and-forth are controlled by said sensing means (196) for causing said thermal spray gun to traverse uniformly relative to the revolving belt (10,20) regardless of any lateral movements of the revolving belt (10,20).
Claim 15
Dependent Claim
140 words
A machine as claimed in claim 13, characterized in that: said means for supporting and traversing said gun (66) include at least one trackway (176,178) extending transversely of the belt (10,20) parallel to the region of the belt (10,20) on which the thermal spray from said gun (66) is impinged, carriage means (180,182) freely movable along said trackway (176,178) transversely relative to the belt (10,20), a leadscrew (92) rotatably mounted on said carriage means (180,182) extending parallel with said trackway (176,178), drive means (94) for rotating said leadscrew (92) for moving the gun (66) for traversing the gun (66) transversely with respect to the belt (10,20), and motive means (188) under the control of said sensing means (196) for moving said carriage means (180,182) along said trackway (176,178) in response to the sensed lateral position of the revolving belt (10,20).
Claim 16
Dependent Claim
102 words
A machine as claimed in claim 14, characterized in that: said sensing means (196) is an element for engaging an edge of the revolving belt (10,20), support means (192,194) extends from said sensing element (196) to said carriage means (180,182) for holding said sensing element (196) at a fixed position relative to the carriage means (180,182), and said motive means (188) urges said carriage means (180,182) in a direction along said trackway (176,178) for causing said sensing element (196) to remain in contact with the edge of the revolving belt (10,20) regardless of any lateral (edgewise movements of the revolving belt (10,20).
Claim 17
Dependent Claim
58 words
A machine as claimed in claim 15, characterized in that: said motive means (188) includes spring means (188) having one end attached in fixed position relative to the machine, and the other end of said spring means (188) is linked to said carriage means (180,182) for urging said carriage means (180,182) in said direction along said trackway (176,178).
Claim 18
Dependent Claim
79 words
A machine as claimed in claim 16, characterized in that: said sensing element (196) is a roller (196) having its axis extending perpendicular to the plane of the belt (10,20) near said roller (196) for allowing said roller (196) to roll along the edge of the belt (10,20) and said spring means (188) acts to maintain said roller (196) in rolling contact with the belt edge for following any lateral movements of the revolving belt (10,20) in either direction.
Claim 19
Dependent Claim
92 words
A machine as claimed in claim 13 to 17, characterized in that: said carriage means (180,182) has a straight accurate guide surface (99) spaced from the leadscrew (92) and extending parallel with the leadscrew (92), said gun (66) has a carrier (98) engaging the leadscrew (92), said carrier (98) has at least one wheel (198,200) mounted thereon, and said wheel (198,200) is in rolling contact with said straight accurate guide surface (99) for guiding and steadying said gun carriage (98) as the gun carriage is traversed by rotation of the leadscrew (92).
References Cited (Backward Citations)
No citation records indexed.
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