CA1234675A - Mold wear compensator - Google Patents
Mold wear compensatorInfo
- Publication number
- CA1234675A CA1234675A CA000459273A CA459273A CA1234675A CA 1234675 A CA1234675 A CA 1234675A CA 000459273 A CA000459273 A CA 000459273A CA 459273 A CA459273 A CA 459273A CA 1234675 A CA1234675 A CA 1234675A
- Authority
- CA
- Canada
- Prior art keywords
- casting
- mold
- face
- mold wall
- wall members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Finishing Walls (AREA)
Abstract
MOLD WEAR COMPENSATOR
ABSTRACT OF THE DISCLOSURE
A mold for continuous casting of molten metal has front, rear and opposed side walls is arranged in a rectangular or box-like configuration and is open at the top and bottom to define a mold cavity. As the metal being cast flows downwardly through the mold, the metal contacts a bearing member at the lower end of the mold. The bearing member reduces contact between the metal and the mold wall thus reducing wear of the mold wall. The bearing member is adjustable to control the degree of contact between the metal and the mold wall.
ABSTRACT OF THE DISCLOSURE
A mold for continuous casting of molten metal has front, rear and opposed side walls is arranged in a rectangular or box-like configuration and is open at the top and bottom to define a mold cavity. As the metal being cast flows downwardly through the mold, the metal contacts a bearing member at the lower end of the mold. The bearing member reduces contact between the metal and the mold wall thus reducing wear of the mold wall. The bearing member is adjustable to control the degree of contact between the metal and the mold wall.
Description
~2~ 5 1 l85.03~ MOLD WEAR COMPI~NSATOR
BACKGROVND OF THE INVENTION
l[n the process of continuously casting steel strands, molten metal is poured into the open upper end of ~ hollow box-like mold. As the molten metal flows downwardly through the mold, the metal is partially cooled, thus forming ~
skin which surrounds a molten metal core. The partially cooled metal strand continues to flow downwardly through the open bottom end of the mold in the form of a continuously slab, billet or the like. The molds used in this process generally comprise a pair OI spaced apart, parallel front and rear walls ~nd a pair of spaced apart, parallel opposed side walls. Each of the walls is m~de of a relatively heavy, outer backing plate construction and an inner copper or copper-like facing or liner. The exposed inner surfaces of the facing form the inner casting surfaces o the molds.
As the partially cooled metal strand flows vertically downwardly through the open bottom end of the mold, the downwardly moving strand is typically withdraYsn from the mold and carried by rollers through a cooling zone and the axes of successive rollers follow an arcuate path such thflt the molten strand follows an ~rcu~te path from the vertical to the horizont~. Water or other cool~nt is sprayed on the molten strand as the strand is c~rried by the rollers and the coolant aids in solidifying the metal strand. As the metal strand moves along the arcuate path from the vertical to the horizontal, the molten strand hardens and solidifies into a solid slab which may thereafter be cut to desired lengths.
In the continuous casting process as heretofore described, coolant is also flowed through the steel jacket or backing plate of e~ch of the mold members to assist in cooling the molten strand to thus aid in solidification of the strand.
`~
~34~
,, ~
11~5.03 Heretofore, the copper or copper-like ~aces of the mold wall members have been subjected to wear resulting in wear patterns and the ~mount of wear on each of the mold f~ces is frequently unequ~. The wear on the mold faces is cAused by at least three factors. A first cause of wear is the abrasion of the met~l strand against the copper face. Even though El mold flux powder is utilized, the abrasion of the hot molten met~ ~gainst the copper face cRuses consideraMe we~r.
A second cQuse OI wear and a substantial cause of the unequal wear of the copper faces is the misalignment of the rollers below the mold. The misalignment of the rollers causes a shifting of the partially molten strand ~nd causes a greater force on portions of the mold wall faces. Furthermore, the movement of the continuous strand in an arcuate path causes stresses which result in unevenly distributed forces against various portions of the copper or copper-like faces.
Yet another factor causing wear on the copper faces is unequal cooling of the strand as the strand moves through the mold and this unequal cooling occurs not only in the top-t~bottom direction but also in the side-to~ide direction of the mold.
It may be appreciated that the uneven wear on the copper mold f~ces changes the dimension of the mold cavity and, therefore, the cross-sectional size and shape of the continuous slab is not eonstant. That is, not only may the bottom of the mold gradually increase in overall size but, in addition there is curvature imparted to the surfaces of the slab. A~l of this requires additional machining of the slab, in addition to cutting the slab to length, so that the exterior surfaces of the finished slab are flQt and so that the cross-section of the slab is ConStQnt.
~;~3~6~
1185.03. Prior to the present invention it was necessary to re-machine the copper facings, to eliminQte the wear patterns, after ~bout 30,00~40,000 tons of molten metsl have been CQSt. This re-machining required extensive time intervals of shutting down the casting operation so that the facings cnuld be ccoled, removed, and r~machined. Of course, it was possible ~o have a duplicate set of facings available so that worn facings could be removed from the mold w~ll backing members and replacement ~acings fastened to the mold w~l backing members. Thus while one set of facings were being re-machined to eliminate wear patterns a second set of facings could ~e utilized. While this reduces the shut~own time of the casting operetion, there is an increased cost because duplicate sets of mold facings are required for each mold.
Another solution to this proolem has been the application of a hard facing such as nickel or chrome on the interior casting surfsce` of lthe mold but this slso substantially increases ~he cost of the mold facing.
SUMMARY OF THE INVENTlON
The present invention overcomes the aforementioned problems by a totally new approach to solving the problem of uneven wear of the mold wall facings.
According to the principles of the present invention, additionsl wear or bearing surfaces are positioned below the mold oetween the bottom of the mold cavity and the first set of rollers. These bearing surfaces function as an extension of the mold ~nd engage the cast strand to substantially reduce contact between the strand and the bottom of the mold wall facing thus substantially reduc-ng any uneven we~r on the mold wall facings.
3~5 1185.03_ The be~ring surface according to the principles of the present invention may be one or more bearing surfQces for each mold wall and the bearing sur~ce, which functions like an extension of the mold, may be adjustable inwardly ~nd outwardly such that ~s the bearing surface WeArs~ the be~ring surf~ce may be adjusted inwardly to maint~in the desired function of reducing contact between the strand and the bottom pQrtion of the mold facing.
The bearing surfaces of the present invention are subst~ntially smaller, in a vertical direction, then the mold wall itself and these be~ring surfaces substanti~lly extend the useful life of the mold facings. Furthermore, because of the relatively small size of the bearing surf~ces, they are substantially less expensive to replace. In addition, because of the small size of these bearing surfaces, if they are to be re-machined there is a subst~ntial reduction of the time interval during whi~h the c~sting operation must be shut down.
`` 123A675i 1185.03_ BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing objects and advantages of the present invention, together with other benefits which may be attRined by its use, will become more ~pparent upon reading the following detailed description of the invention taken in conjunction with the drawings.
ln the drawings, wherein like reference numerals identify corresponding components:
Figure 1 is a perspective illustration of a continuous casting mold;
Figure 2 is a front elevational view of the interior mold wall with the wear pattern illustrated thereon;
Figure 3 is a perspective illustration of a mold wall with the bearing surfaces of the present invention positioned at the bottom of the mold wall;
Figure 4 i~ a side elevation~ ~iew as seen in the plane of arrows 4-4 of Figure 3; and Figure 5 is a cross-sectional view as seen in the direction of arrows 5-5 of ~igure 4.
~ 3~
1185.031 DETAlLED DESCRIPTION OF T~IE INVENTION
, A continuous casting mold 10, illustrated in Yigure 1 typically CDmpriSes Q pair OI opposed, spaced apart from Emd rear mold wall members 11, 12, respectively, and a pair of opposed, spaced apart side mold wall members 13, 14, respectiYely. The four mold wall members are configured as Q generally square or rectangular box~ e container open a$ the top and bottom with the side wall members 13, 14 adjustably clamped between the front ~nd rear wall members 11, 12, to define a casting csvity 15 therebetween. Molten metQl is poured into the upper, open end of the cavi~y 15 and solidified metal in the form of a slab having Q solidified skin enclosing a molten metal core emerges from the open lower end of the mold cavity. The slab emerging from the lower open end of the casting csvity will be engaged by rollers which cause the sla~ to follow a downward arcuste path from the vertical tow~rd the horizontal 8S iS well known.
The front and rear mold wall members 11, 12 are each formed as a laminate structure including a copper or copper-like facing 16 mounted to a steel jacket or steel backing plate 17.
Similarly, the side wall members 13, 14 are each formed AS a laminate structure including a copper or copper-like f~ce plate 18 mounted to a steel jacket or steel backing plate 19.
Conventional adjustment means 20 are provided to spread apart the front and re~ mold wall members so that the side wall members may be moved toward or away from each other thereby adjusting the width of the casting cavity 15, with each of the copper facing plates positioned to contact the molten metal during the casting operation.
~23~
1185.0~ As is conventional, means are provided for cooling the molten metal during the casting operstion. Specifically, each of the copper ~acing plates 16, 18 is provided with R plur~lity of vertical chflnnels or grooves 21 machined in one face thereof. Each of the steel backing plstes 17, 19 are provided with upper and lower horizontal grooves 22, 23 which function flS
headers with the grooves 22, 23 being in communicRtion with each of the vertical channels 21 when the copper facing is secured to the steel backing plate. Inlet and outlet ports 249 25, respectively, are machined through the steel backing plate in fluid communication with the headers 22, 23 such that upon introduction of a coolant such as water into the inlet port 24, the coolant ~lows through the header, through the ch~nnels, through the opposite header and emerges through the outlet port 25.
Prior to the present invention, for reflsons previously discussed such as abrasion of the cast molten metal against the fscing plates, misalignment of the rollers below the mold relative to the cavity and unegual cooling, the copper facing plates 16, 18 tend to wear unevenly. Figure 2 illustrates the typical wear patterns which develop on a copper facing plate including a first section 30 which would exhibit the greatest amount of wear, ~nd second, third and fourth sections 31, 32 and 33, respectively, which exhibit successively less weflr. After the casting of 20,000-40,000 tons of steel, the wear on an individu~l facing could be as high QS .04û inch for section 30, .030 inch at 31, .020 inch in section 32 and .D10 inch in section 33. It should be appreciated that wear patterns will exist on fll~ four of the copper facings.
To substantially reduce if not eliminate these wear patterns on the facing plates themselves, the present invention provides bearing means 40 for substantially reducing contact between the cast molten met~l strand and the copper facing plates 16, 18. The bearing means are easi'y replaceable, relatively inexpensive, and serve as 8 vertical extension of the mold cavity walls at the lower end of the mold.
~23~L6~
1185.~\ _ With reference to Figures 3, 4, and 5, the preferred bearing means of the present invention includes a first mounting block 41 mounted to the bottom of the b~cking plate 17 by a plurallty of bolts 42. The mounting block 41 which may be made of steel, includes a transverse bore 43 therethrough with the axis of the bore being perpendicular to the direction of casting of the molten metal. Specifically the bore 43 extends from the outside toward the inside of the mold and the bore is provided with an axial keywfly 44.
The bearing mesns 4û also includes a bearing surface block 45 which may be made of copper or which has a copper facing and is secured to a shaft 46. Shaft 46 is dimensioned to fit within the transverse bore 43 ~nd includes an axial key 47 to engage the keyway 44 in the~ mounting block. The combination of the key and keyway prevents rotational motion of the bearing surface 45.
It is desired to be able to adjust the position of the bearing surface block 45 relative to the cavity and means are provided to accomplish such adjustment. In the illustrated embodimlent, shRIt 46 includes a plurality of teeth 48 formed one side of the shaft in the nature of a rack. Gear means 49 is mounted by a mounting bracket 50 to the ba~king plate 17 and a lever or other advancin~ means 51 is provided to rotate the gear 49 in either direction to thereby advance or withdraw the toothed rack shaft 46. Movement of the shaft 46 results in corresponding linear movement of the bearing surface block 45.
As illustrated in Figure 4, the position of the bearing surface block 45 in contact with the solidified skin 52 of the molten metal strand 53 provides a space or separation 54 between the strand 53 and the copper facing 16 at the bottom end of the mold cavity thereby substantially reducing wear and substanti~lly eliminating any Imeven wear of the copper facing plates.
--` 123~L6~;
1185.0~ The present invention contemplates the prvvision of bearing means 40 for one or more of the mold wall members 1l, 12, 13 and 14. Ln addition, the bearing means mQy include n single bearing surface block 45 extending the full side to-side dimesion of the mold wQIl f~cing or, as illustrated in Figure 3, there may be a plur 1ity of such bearing surface blocks 45 each of which would be individually adjustable.
It may be appreciated that QS the beEIring surface block 45 wears, the position of the shaft 46 is advanced inwardly toward the strand to thus reduce contact between the strand 53 and the mold wall facing 16. Such sdjustment may be accomplished during Q eontinuous casting operation or between casting operations.
Should the copper bearing surface block 45 become worn, it may be easily replaced by advancing the gear 4~ so that the sh~ft 46 m~y be withdrawn from the mounting block 41 and a new bearing block-shaft combination inserted into the mounting block.
It should be appreciated that the bearing surface means may be attached to the bottom of the mold or, alternatively, may be secured to the rollers below the moldl or may be independently mounted between the bottom the mold and the top of the first set of rollers.
The foregoing is a complete description of a preferred embodiment of the present invention. Various changes may ~e made without departing from the spirit and scope of the present invention. The present invention, therefore, should be limited only by the following claims.
What is claimed is:
BACKGROVND OF THE INVENTION
l[n the process of continuously casting steel strands, molten metal is poured into the open upper end of ~ hollow box-like mold. As the molten metal flows downwardly through the mold, the metal is partially cooled, thus forming ~
skin which surrounds a molten metal core. The partially cooled metal strand continues to flow downwardly through the open bottom end of the mold in the form of a continuously slab, billet or the like. The molds used in this process generally comprise a pair OI spaced apart, parallel front and rear walls ~nd a pair of spaced apart, parallel opposed side walls. Each of the walls is m~de of a relatively heavy, outer backing plate construction and an inner copper or copper-like facing or liner. The exposed inner surfaces of the facing form the inner casting surfaces o the molds.
As the partially cooled metal strand flows vertically downwardly through the open bottom end of the mold, the downwardly moving strand is typically withdraYsn from the mold and carried by rollers through a cooling zone and the axes of successive rollers follow an arcuate path such thflt the molten strand follows an ~rcu~te path from the vertical to the horizont~. Water or other cool~nt is sprayed on the molten strand as the strand is c~rried by the rollers and the coolant aids in solidifying the metal strand. As the metal strand moves along the arcuate path from the vertical to the horizontal, the molten strand hardens and solidifies into a solid slab which may thereafter be cut to desired lengths.
In the continuous casting process as heretofore described, coolant is also flowed through the steel jacket or backing plate of e~ch of the mold members to assist in cooling the molten strand to thus aid in solidification of the strand.
`~
~34~
,, ~
11~5.03 Heretofore, the copper or copper-like ~aces of the mold wall members have been subjected to wear resulting in wear patterns and the ~mount of wear on each of the mold f~ces is frequently unequ~. The wear on the mold faces is cAused by at least three factors. A first cause of wear is the abrasion of the met~l strand against the copper face. Even though El mold flux powder is utilized, the abrasion of the hot molten met~ ~gainst the copper face cRuses consideraMe we~r.
A second cQuse OI wear and a substantial cause of the unequal wear of the copper faces is the misalignment of the rollers below the mold. The misalignment of the rollers causes a shifting of the partially molten strand ~nd causes a greater force on portions of the mold wall faces. Furthermore, the movement of the continuous strand in an arcuate path causes stresses which result in unevenly distributed forces against various portions of the copper or copper-like faces.
Yet another factor causing wear on the copper faces is unequal cooling of the strand as the strand moves through the mold and this unequal cooling occurs not only in the top-t~bottom direction but also in the side-to~ide direction of the mold.
It may be appreciated that the uneven wear on the copper mold f~ces changes the dimension of the mold cavity and, therefore, the cross-sectional size and shape of the continuous slab is not eonstant. That is, not only may the bottom of the mold gradually increase in overall size but, in addition there is curvature imparted to the surfaces of the slab. A~l of this requires additional machining of the slab, in addition to cutting the slab to length, so that the exterior surfaces of the finished slab are flQt and so that the cross-section of the slab is ConStQnt.
~;~3~6~
1185.03. Prior to the present invention it was necessary to re-machine the copper facings, to eliminQte the wear patterns, after ~bout 30,00~40,000 tons of molten metsl have been CQSt. This re-machining required extensive time intervals of shutting down the casting operation so that the facings cnuld be ccoled, removed, and r~machined. Of course, it was possible ~o have a duplicate set of facings available so that worn facings could be removed from the mold w~ll backing members and replacement ~acings fastened to the mold w~l backing members. Thus while one set of facings were being re-machined to eliminate wear patterns a second set of facings could ~e utilized. While this reduces the shut~own time of the casting operetion, there is an increased cost because duplicate sets of mold facings are required for each mold.
Another solution to this proolem has been the application of a hard facing such as nickel or chrome on the interior casting surfsce` of lthe mold but this slso substantially increases ~he cost of the mold facing.
SUMMARY OF THE INVENTlON
The present invention overcomes the aforementioned problems by a totally new approach to solving the problem of uneven wear of the mold wall facings.
According to the principles of the present invention, additionsl wear or bearing surfaces are positioned below the mold oetween the bottom of the mold cavity and the first set of rollers. These bearing surfaces function as an extension of the mold ~nd engage the cast strand to substantially reduce contact between the strand and the bottom of the mold wall facing thus substantially reduc-ng any uneven we~r on the mold wall facings.
3~5 1185.03_ The be~ring surface according to the principles of the present invention may be one or more bearing surfQces for each mold wall and the bearing sur~ce, which functions like an extension of the mold, may be adjustable inwardly ~nd outwardly such that ~s the bearing surface WeArs~ the be~ring surf~ce may be adjusted inwardly to maint~in the desired function of reducing contact between the strand and the bottom pQrtion of the mold facing.
The bearing surfaces of the present invention are subst~ntially smaller, in a vertical direction, then the mold wall itself and these be~ring surfaces substanti~lly extend the useful life of the mold facings. Furthermore, because of the relatively small size of the bearing surf~ces, they are substantially less expensive to replace. In addition, because of the small size of these bearing surfaces, if they are to be re-machined there is a subst~ntial reduction of the time interval during whi~h the c~sting operation must be shut down.
`` 123A675i 1185.03_ BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing objects and advantages of the present invention, together with other benefits which may be attRined by its use, will become more ~pparent upon reading the following detailed description of the invention taken in conjunction with the drawings.
ln the drawings, wherein like reference numerals identify corresponding components:
Figure 1 is a perspective illustration of a continuous casting mold;
Figure 2 is a front elevational view of the interior mold wall with the wear pattern illustrated thereon;
Figure 3 is a perspective illustration of a mold wall with the bearing surfaces of the present invention positioned at the bottom of the mold wall;
Figure 4 i~ a side elevation~ ~iew as seen in the plane of arrows 4-4 of Figure 3; and Figure 5 is a cross-sectional view as seen in the direction of arrows 5-5 of ~igure 4.
~ 3~
1185.031 DETAlLED DESCRIPTION OF T~IE INVENTION
, A continuous casting mold 10, illustrated in Yigure 1 typically CDmpriSes Q pair OI opposed, spaced apart from Emd rear mold wall members 11, 12, respectively, and a pair of opposed, spaced apart side mold wall members 13, 14, respectiYely. The four mold wall members are configured as Q generally square or rectangular box~ e container open a$ the top and bottom with the side wall members 13, 14 adjustably clamped between the front ~nd rear wall members 11, 12, to define a casting csvity 15 therebetween. Molten metQl is poured into the upper, open end of the cavi~y 15 and solidified metal in the form of a slab having Q solidified skin enclosing a molten metal core emerges from the open lower end of the mold cavity. The slab emerging from the lower open end of the casting csvity will be engaged by rollers which cause the sla~ to follow a downward arcuste path from the vertical tow~rd the horizontal 8S iS well known.
The front and rear mold wall members 11, 12 are each formed as a laminate structure including a copper or copper-like facing 16 mounted to a steel jacket or steel backing plate 17.
Similarly, the side wall members 13, 14 are each formed AS a laminate structure including a copper or copper-like f~ce plate 18 mounted to a steel jacket or steel backing plate 19.
Conventional adjustment means 20 are provided to spread apart the front and re~ mold wall members so that the side wall members may be moved toward or away from each other thereby adjusting the width of the casting cavity 15, with each of the copper facing plates positioned to contact the molten metal during the casting operation.
~23~
1185.0~ As is conventional, means are provided for cooling the molten metal during the casting operstion. Specifically, each of the copper ~acing plates 16, 18 is provided with R plur~lity of vertical chflnnels or grooves 21 machined in one face thereof. Each of the steel backing plstes 17, 19 are provided with upper and lower horizontal grooves 22, 23 which function flS
headers with the grooves 22, 23 being in communicRtion with each of the vertical channels 21 when the copper facing is secured to the steel backing plate. Inlet and outlet ports 249 25, respectively, are machined through the steel backing plate in fluid communication with the headers 22, 23 such that upon introduction of a coolant such as water into the inlet port 24, the coolant ~lows through the header, through the ch~nnels, through the opposite header and emerges through the outlet port 25.
Prior to the present invention, for reflsons previously discussed such as abrasion of the cast molten metal against the fscing plates, misalignment of the rollers below the mold relative to the cavity and unegual cooling, the copper facing plates 16, 18 tend to wear unevenly. Figure 2 illustrates the typical wear patterns which develop on a copper facing plate including a first section 30 which would exhibit the greatest amount of wear, ~nd second, third and fourth sections 31, 32 and 33, respectively, which exhibit successively less weflr. After the casting of 20,000-40,000 tons of steel, the wear on an individu~l facing could be as high QS .04û inch for section 30, .030 inch at 31, .020 inch in section 32 and .D10 inch in section 33. It should be appreciated that wear patterns will exist on fll~ four of the copper facings.
To substantially reduce if not eliminate these wear patterns on the facing plates themselves, the present invention provides bearing means 40 for substantially reducing contact between the cast molten met~l strand and the copper facing plates 16, 18. The bearing means are easi'y replaceable, relatively inexpensive, and serve as 8 vertical extension of the mold cavity walls at the lower end of the mold.
~23~L6~
1185.~\ _ With reference to Figures 3, 4, and 5, the preferred bearing means of the present invention includes a first mounting block 41 mounted to the bottom of the b~cking plate 17 by a plurallty of bolts 42. The mounting block 41 which may be made of steel, includes a transverse bore 43 therethrough with the axis of the bore being perpendicular to the direction of casting of the molten metal. Specifically the bore 43 extends from the outside toward the inside of the mold and the bore is provided with an axial keywfly 44.
The bearing mesns 4û also includes a bearing surface block 45 which may be made of copper or which has a copper facing and is secured to a shaft 46. Shaft 46 is dimensioned to fit within the transverse bore 43 ~nd includes an axial key 47 to engage the keyway 44 in the~ mounting block. The combination of the key and keyway prevents rotational motion of the bearing surface 45.
It is desired to be able to adjust the position of the bearing surface block 45 relative to the cavity and means are provided to accomplish such adjustment. In the illustrated embodimlent, shRIt 46 includes a plurality of teeth 48 formed one side of the shaft in the nature of a rack. Gear means 49 is mounted by a mounting bracket 50 to the ba~king plate 17 and a lever or other advancin~ means 51 is provided to rotate the gear 49 in either direction to thereby advance or withdraw the toothed rack shaft 46. Movement of the shaft 46 results in corresponding linear movement of the bearing surface block 45.
As illustrated in Figure 4, the position of the bearing surface block 45 in contact with the solidified skin 52 of the molten metal strand 53 provides a space or separation 54 between the strand 53 and the copper facing 16 at the bottom end of the mold cavity thereby substantially reducing wear and substanti~lly eliminating any Imeven wear of the copper facing plates.
--` 123~L6~;
1185.0~ The present invention contemplates the prvvision of bearing means 40 for one or more of the mold wall members 1l, 12, 13 and 14. Ln addition, the bearing means mQy include n single bearing surface block 45 extending the full side to-side dimesion of the mold wQIl f~cing or, as illustrated in Figure 3, there may be a plur 1ity of such bearing surface blocks 45 each of which would be individually adjustable.
It may be appreciated that QS the beEIring surface block 45 wears, the position of the shaft 46 is advanced inwardly toward the strand to thus reduce contact between the strand 53 and the mold wall facing 16. Such sdjustment may be accomplished during Q eontinuous casting operation or between casting operations.
Should the copper bearing surface block 45 become worn, it may be easily replaced by advancing the gear 4~ so that the sh~ft 46 m~y be withdrawn from the mounting block 41 and a new bearing block-shaft combination inserted into the mounting block.
It should be appreciated that the bearing surface means may be attached to the bottom of the mold or, alternatively, may be secured to the rollers below the moldl or may be independently mounted between the bottom the mold and the top of the first set of rollers.
The foregoing is a complete description of a preferred embodiment of the present invention. Various changes may ~e made without departing from the spirit and scope of the present invention. The present invention, therefore, should be limited only by the following claims.
What is claimed is:
Claims (13)
1. In the continuous casting metal mold formed of a pair of opposed, spaced apart front and rear mold wall members and a pair of opposed spaced apart side mold wall members, each of said front, rear and side mold wall members having a substantially planar interior casting face, the front, rear and side mold wall members arranged to form a roughly rectangular and cross-section open upper and lower ended primary casting cavity defined by said interior casting faces, the improvement comprising:
bearing surface means below at least one of said interior casting faces, said bearing surface means including a generally flat auxiliary casting face, said auxiliary casting face extending inwardly beyond the plane of the interior casting face such that the plane of the auxiliary casting face is inwardly offset with respect to the plane of the interior casting face to form an inwardly stepped region adjacent the exit portion of the primary casting cavity, said stepped region directing the metal strand away from the exit portion of the primary casting cavity.
bearing surface means below at least one of said interior casting faces, said bearing surface means including a generally flat auxiliary casting face, said auxiliary casting face extending inwardly beyond the plane of the interior casting face such that the plane of the auxiliary casting face is inwardly offset with respect to the plane of the interior casting face to form an inwardly stepped region adjacent the exit portion of the primary casting cavity, said stepped region directing the metal strand away from the exit portion of the primary casting cavity.
2. The invention as defined in claim 1, wherein at least two bearing surface means are provided, one below and adjacent to each of the front and rear mold wall members, each of said bearing surface means including a generally flat auxiliary casting face.
3. The invention as defined in claim 1 wherein said casting face of the bearing surface means is adjustable toward and away from the plane of the opposed interior cast-ing face.
4. The invention as defined in claim 2 wherein the casting face of the bearing surface means is adjustable during continuous casting.
5. The invention as defined in claim 1 wherein said casting face of the bearing surface means includes a plurality of discrete generally flat auxiliary casting faces.
6. The invention as defined in claim 1 wherein said bearing surface means is secured to said mold.
7. In a continuous casting metal mold formed of a pair of opposed, spaced apart front and rear mold wall members and a pair of opposed spaced apart side mold wall members, each of said front, rear and side mold wall members having an interior casting face, said mold wall members arranged to form a box-like open upper and lower ended cast-ing cavity defined by said casting faces, the improvement comprising:
bearing means including an additional generally flat casting face positioned below said mold such that upon casting a metal strand, the strand will contact the addition-al casting face for reducing contact between at least one mold wall member face and the metal strand being cast.
bearing means including an additional generally flat casting face positioned below said mold such that upon casting a metal strand, the strand will contact the addition-al casting face for reducing contact between at least one mold wall member face and the metal strand being cast.
8. The invention as defined in claim 7 including bearing means positioned below both said front and rear mold wall members each including an additional generally flat casting face for reducing contact between the metal strand being cast and both said front and rear mold wall member faces.
9. The invention as defined in claim 7 wherein said bearing means additional casting face is adjustable inwardly and outwardly relative to said casting cavity.
10. The invention as defined in claim 7 wherein said bearing means additional casting face includes a plurality of discrete generally flat casting faces.
11. The invention as defined in claim 7 wherein said bearing means additional casting face includes a plurality of discrete generally flat casting faces each of which is selectively and independently adjustable.
12. The invention as defined in claim 7 wherein said bearing means additional casting face is adjustable during casting.
13. The invention as defined in claim 7 wherein said bearing means is secured to said mold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56884484A | 1984-01-06 | 1984-01-06 | |
| US568,844 | 1990-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1234675A true CA1234675A (en) | 1988-04-05 |
Family
ID=24272972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000459273A Expired CA1234675A (en) | 1984-01-06 | 1984-07-19 | Mold wear compensator |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS60148644A (en) |
| BE (1) | BE900446A (en) |
| BR (1) | BR8403964A (en) |
| CA (1) | CA1234675A (en) |
| DE (1) | DE3445783A1 (en) |
| FR (1) | FR2557821B1 (en) |
| GB (1) | GB2152412B (en) |
| IT (1) | IT1237358B (en) |
| SE (1) | SE8403750L (en) |
| ZA (1) | ZA845709B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH461713A (en) * | 1967-03-22 | 1968-08-31 | Concast Ag | Device for supporting a strand in continuous casting plants |
| CH602223A5 (en) * | 1976-12-30 | 1978-07-31 | Concast Ag | |
| FR2445744A1 (en) * | 1979-01-04 | 1980-08-01 | Clesid Sa | Continuous casting machine for slabs - where narrow mould walls are hinged on plates supporting edges of semi-solid slab |
| FR2517227A1 (en) * | 1981-12-01 | 1983-06-03 | Clesid Sa | METAL CONTINUOUS CASTING MACHINE, IN PARTICULAR FOR A MULTI-LINE COUPLING INSTALLATION |
-
1984
- 1984-07-17 SE SE8403750A patent/SE8403750L/en not_active Application Discontinuation
- 1984-07-19 CA CA000459273A patent/CA1234675A/en not_active Expired
- 1984-07-24 ZA ZA845709A patent/ZA845709B/en unknown
- 1984-08-08 GB GB08420137A patent/GB2152412B/en not_active Expired
- 1984-08-08 BR BR8403964A patent/BR8403964A/en unknown
- 1984-08-28 BE BE0/213551A patent/BE900446A/en not_active IP Right Cessation
- 1984-09-14 IT IT8467918A patent/IT1237358B/en active
- 1984-09-14 FR FR8414126A patent/FR2557821B1/en not_active Expired
- 1984-09-20 JP JP59195903A patent/JPS60148644A/en active Pending
- 1984-12-12 DE DE19843445783 patent/DE3445783A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| IT8467918A0 (en) | 1984-09-14 |
| ZA845709B (en) | 1985-03-27 |
| SE8403750L (en) | 1985-07-07 |
| BE900446A (en) | 1984-12-17 |
| DE3445783A1 (en) | 1985-08-29 |
| FR2557821B1 (en) | 1987-10-09 |
| BR8403964A (en) | 1985-08-20 |
| GB8420137D0 (en) | 1984-09-12 |
| FR2557821A1 (en) | 1985-07-12 |
| GB2152412B (en) | 1987-10-14 |
| SE8403750D0 (en) | 1984-07-17 |
| IT1237358B (en) | 1993-05-31 |
| JPS60148644A (en) | 1985-08-05 |
| GB2152412A (en) | 1985-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |