USRE27469E

USRE27469E - Quick-change mounting for water-cooled mold

Info

Publication number: USRE27469E
Authority: US
Current assignee: United States Steel Corp
Priority date: 1970-05-04
Filing date: 1970-05-04
Publication date: 1972-09-05

Abstract

A CONTINUOUS-CASTING MOLD IS MOUNTED IN A VERTICALLY RECIPROCATING HORIZONTAL RECTANGULAR FRAME. ON EACH OF TWO OPPOSITE SIDES OF THE FRAME, SEPARABLE COOLING-WATER MANIFOLDS ARE MOUNTED, ONE ON THE OTHER, WITH SELF-ACTING MAKE-AND-BREAK CONNECTIONS THEREBETWEEN. THE MOLD IS SECURED WITHIN THE FRAME TO BEAMS BRIDGING THE UPPER MANIFOLDS. PIPING CONDUCTS WATER FROM THE UPPER MANIFOLDS TO AND FROM WATER-COOLING PASSAGES IN THE MOLD. FLEXIBLE HOSE CONNECTED TO THE LOWER MANIFOLD PROVIDES FOR A SUPPLY OF COOLING WATER THERETO AND ITS RETURN. ON LIFTING THE BEAMS, AND THE UPPER MOLD-SUPPORTING MANIFOLDS, THE SELF-ACTING CONNECTIONS ARE BROKEN.

Description

Sept. 5, 1972 C, BQDE, JR Re. 27,469

QUICK-CHANGE MOUNTING FOR WATER-COOLED MOLD llc INVENTOR.

CHARLES H- BODE,JR BYMM ATTORNEY Se'pf- 5, 1972 c. H. BODE, JR

QUICK-CHANGE- MUNTING FOR WATER-COOLED MOLD 5 Sheets-Sheet 2 v Original Filed Oct. l5, 1964 El @M` ATTORNEY Sept. 5, 1972 c. H. BODE, JR

QUICK-CHANGE MOUNTING FOR WATER-COOLED MLD4 5 Sheets-Sheet 5 Original Filed Oct. 15, 1964 H w E? n 2 2 N R m mm E A 0 W w T lllllll l 5 w M m m m w Y INVENTOR CH ARLES H. B 005,118. BY M1 91%,

ATTORNEY Y Sept. 5, 1972 c. H. BoDE, JR

QUICK-CHANGE MNTING FOR WATER-COOLED MOLD 5 sheets-sheet 4 original Filed oct. 15, 1964 NVENTOR. cHARu-:s H. Bouma.

ATTORNEY Sept. 5, 1972 C. H. BODE, JR

QUICK-CHANGE MOUNTING FORWATER-GOOLED MOLD Original Filed Ot. l5. 1964 A TER our WATER m 5 Sheets-Sheet 5 INVENTOR. CHARLES H. BODEJR BY M25. $5250.

ATTORNEY AInited"States Patent O 27,469 QUICK-CHANGE MOUNTING FOR WATER-COOLED MOLD Charles H. Bode, Jr., Upper St. Clair Township, Allegheny County, Pa., assignor to United States Steel Corporation Original No. 3,381,743, dated May 7, 1968, Ser. No. 404,002, Oct. 15, 1964. Application for reissue May 4, 1970, Ser. No. 34,663

Int. Cl. B22d 11/00, 27/08 U.S. Cl. 164-283 8 Claims Matter enclosed in heavy brackets I' appears in the original patent but forms no part of this reissue specilication; matter printed in italics indicates the additions made by reissue.

ABSTRACT F THE DISCLOSURE A continuous-casting mold is mounted in a vertically reciprocating horizontal rectangular frame. On each of two opposite sides of the frame, separable cooling-water manifolds are mounted, one on the other, with self-acting make-and-break connections therebetween. The mold is secured within the frame to beams bridging the upper manifolds. Piping conducts water from the upper manifolds to and from water-cooling passages in the mold. Flexible hose connected to the lower manifold provides for a supply of cooling water thereto and its return. On lifting the beams, and the upper mold-supporting manifolds, the self-acting connections are broken.

This invention relates to mountings for Amolds used for the continuous casting of molten metals such as steel.

To start the casting operation, the molten metal is poured into the upper end of a tubular reciprocating mold to a predetermined level while the lower end is closed by a removable plug called a start bar. After initial solidification the casting is started downwardly under the control pinch rolls engaging the starter bar. The equipment for mounting the mold, called an oscillator frame, includes stationary and movable members, the latter being adapted to be raised and lowered periodically, and cooling water for the mold must be conducted through tlexible hoses from stationary headers or the like. Heretofore, these hoses have been connected by couplings requiring manual making and breaking whenever the mold in use is to be removed and replaced by another and the labor involved causes delays and inconvenience.

Delays in changing a mold not only cause the continu-l ous-casting apparatus to stand idle; they also cause dislocations in other operating areas of the mill of which the continuous-casting apparatus is a part.

The object of the present invention is to eliminate this problem of coupling manipulation by workmen, so that mold-change time is reduced. l

To disclose the principles of my invention, a specific example of a quick-change mounting for a continuouscasting mold is 'disclosed in the accompanying drawings.

In these drawings:

FIG. 1 is a side elevation, with parts broken away and parts in section, of my quick-change mounting;

IFIG. 2 is a front elevation, with parts broken away and parts shown in section;

lFIG. 3 is a top plan view, with parts broken away;

FIG. 4 is a horizontal cross section taken on line 4-4 in FIG. 1;

i FIG. 5 is a vertical section taken on the line 5--5 in FIG. 4; and

FIG. 6 is a diagrammatic perspective view showing the arrangement of fluid passages between the mounting and mold.

ice

Referring now to FIGS. 1 to 3 and especially to FIG. 1, the quick-change mounting of my invention includes a mold oscillator frame, indicated generally at 10, and comprising a base 11 and a vertically reciprocable upper-portion 12. The latter includes liquid-conducting portions 13 or manifolds having connections 14 for exible hoses '15.

My mounting includes a mold-support frame 16 removably positioned on the upper portion 12 and having liquid-conducting portions of manifolds 17 located to register with the liquid conducting portions 13. 'I'his frame 16 has cross beams 18 which support the vertical openended tubular mold 19. Conduits 20, which may be rigid pipes, connect the liquid-conducting portions 17 of the mold support frame 16 with the upper and lower ends of the mold 19.

The liquid-conducting portions 13 of frame 10 are connected to the liquid-conducting portions 17 of the moldsupport frame 16, by mutually registering separable liquid connections which include upwardly extending nipples 21 integral with the upper portion 12 of mold-oscillator frame 10, and openings 22 or nipple sockets therefor in frame 16.

The base 11 of frame 10 is a four-sided structure which has the shape of an open rectangle as seen in plan view. The four sides thereof include two opposite sides 11a and 11c which are parallel to the face walls of the molds 19 and the other two sides 11b and 11d which are parallel to the edge walls of mold 19. Sides 11b, 11e and 11d are of -equal width while side 11a is wider to support a motor and an associ-ated drive mechanism.

Base 11 has a bottom 30 secured to a suitable supporting structure, such as licor 31 (shown in FIG. 2). Base 11 has .vertical walls 33 which extend upwardly from the edges of bottom 30 and support

horizontal platforms

34 and 35. Platform 34 is a four-sided

structure having sides

34a, 34b, 34c, and 34d of equal width arranged in the form of an open rectangle as seen in plan |view.

Sides

34h, 34c, and 34d overlie sides 11b, 11o and 11d respectively of base 11. Platform 35 is a rectangular structure at a slightly lower elevation than platform 34 and lying adjacent to side 34a thereof.

The upper portion 12 of frame 10 is reciprocated up wardly and downwardly by means of cams 36 driven by motor 37 through a drive system which includes a pair of bevel gears 38 as well as the necessary shafts 39 and couplings 40. Cams 36 are supported by platform 34 at each of the four corners thereof. Motor 37 and bevel gears 38 are supported on platform 35. Details of drive mechanisms of this sort are known and will therefore not be further described here.

'Ihe upper portion 12 of frame 10 comprises a rectangle 45 made up of four I-

beam lengths

45a, 45h, 45e, and 45d joined together at their ends. Rectangle 45 rides on cams ,[46] 36. The I-

beam lengths

45a, 45h, 45c, and 45d are located directly above

sides

34a, 34h, 34c, and 34d respectively of platform 34. The I-beam lengths are narrower than the platform sides and are aligned so that the inner edge of each I-bearn length lies substantially directly above the corresponding inner edge of platform 34. The I-

beam lengths

45a, 45h, 45c and 45d are joined together at their ends 'by

corner pieces

46a, 46h, 46c, and 46d.

Portions of I-

beam lengths

45b and 45d are cut away to provide space for liquid-conducting portions 13 of frame 10. These portions 13 are formed by rectangular metal tubes 47a and 47h welded to I-beams 45h and 45d.

The reciprocable portion 12 of oscillator frame 10 is guided for vertical motion by means of a plurality of guide roller mechanisms 50, 50a, 50h, 50c, and 50d, which are identical in construction and are mounted on the four

sides

34a, 34h, 34c, and 34d respectively of platform 34 and on the corresponding

sides

45a, 45h, 45e, and 45d respectively of rectangle 45. Each of the guide '

oller mechanisms

50a, 50b, 50c, and 50d comprises a pair )f guide brackets 52 secured to the platform 34, rollers i3 on guide brackets 52, a pair of vertical guide strips i5a, 55b, 55e, and 55d welded to the adjacent 1-

beam engths

45a, 45h, 45o and 45d, respectively, and having vear surfaces 56 thereon for contact with rollers 53. The tuide strips 55b and 55d are also welded to tubes 47a ind 47b respectively of liquid-conducting portions 13. Iompression springs '57 are provided for resisting the upvard movement of the portion 12 of the frame 10. The nountings for compression springs 57 include studs 58 raving screw-threaded ends, the lower one `fixedly engagng the base 11 of the frame 10 and the upper one carryng a washer 59 for springs 57. The vertical guides 55 Llso carry a plate 60 at the lower end thereof, which las holes to permit free passage of shafts 58 therethrough md which serve as bearings for springs 57. Thus springs i7 are confined between abutmcnts 59 and '60, and are :ompressed by the upstroke of portion 12 of frame 10, Lnd expand on the downstroke. A pair of compression prings 57 is located along each of the four sides of frame .0.

The space in each of the two liquid-conducting porions 13 is divided by a vertical partition 63 into an inlet ection 61 and an outlet section 62 of about equal size. lhe inlet sections 61 receive cooling Water from iixed leaders (not shown), and the outlet sections 62 return :ooling water to similar fixed headers (not shown). Verical partitions 63a divide each of the inlet and outlet ections in liquid-conducting portions 13 into a plurality if chambers 64 (eight in each liquid-conducting portion L3 are shown in the drawings herein), and the hose conlections 14, one for each chamber 64, extend outwardly rom the side walls of tubes 47a and 47b. Openings in hese tubes 47a and 47b provide liuid communication beween liquid-conducting portion 13 and the fixed headers 'not shown) through hose connections 14 and flexible noses 15.

A plurality of the nipples 21 extend upwardly from penings in the top walls of tubes 47a and 47b and pro- 'ide fluid communication between liquid-conducting porions 13 of frame 10 and liquid-conducting portions `17 f frame 16. One nipple extends from each of the chamers 64 in liquid-conducting portions 13.

Frame 16 includes spaced metal tubes 66 between which `xtend a pair of beams 18 welded thereto. Tubes 66 rest n I-beams 45h and 45d respectively when mold support rame 16 is in metal casting position on mold oscillator rame 10. Beams 18 extend longitudinally of the casting f ynd are welded to the exterior walls of mold 19. Liquidonducting portions 17 occupy all of tubes 66 except for he ends. Partitions 67 separate the liquid-conducting porions 17 from the ends. The two liquid-conducting porions 17 of frame 16 lie directly above the liquid-conductng portions 13 of frame 10 when frame 16 is resting o n rame 10.

The liquid conducting portions 17 of frame 10 are each ivided into two sections of approximately the-same size y internal partition 68. One of these sections 69 serves s an inlet for cooling water from the sections 61 of quid-conducting portions 13 of frame 10, and the other ection 70 serves as a return section to receive water from told 1'9. Each of these two sections is subdivided by partions 71 into a plurality of chambers 72, each one of fhich is in communication with one of the chambers 64 1 liquid-conducting portions 13 of the frame `10 through conduit 20.

Each of the tubes 66 has a reinforcing plate 73 above 1e liquid-conducting portion 17 therein and a pair of :inforcing plates '74 and 75 below it. Plates 74 and 75 rovide reinforcement in the area of contact between ame 10 and mold support frame 16. These reinforcing lates extend beyond tubes 66 to form a ilange, are bolted igether, and are spaced apart by a thin layer of elastoieric sealing material.

Reinforcing plates 74 and 75 have openings 22 therein which register with nipples 21, to provide iiuid communication between the liquid-conducting portions 13 and 17 of mold frame 10 and frame 16 respectively. A iiuidtight seal preventing escape of cooling Water is provided by O-rings 76 in a recess in the exterior of nipples 21 and in contact with the internal wall constituting opening 22 in tube 66. An additional O-ring 77 is preferably located in a recess in the upper walls of tubes 47a and 47b to provide sealing engagement between the tube walls and plate 75.

Referring now to FIGS. 4 and 5, mold 19 includes a pair of

iianges

80 and 81 at the upper and lower ends thereof respectively. Cooling water ows upwardly through mold 19 from lower flange 81 to upper liange 80. Piping indicated generally at 20 includes a plurality of conduits 20a connecting lower liange 81 with the inlet sections 69 of liquid-conducting portions 17 in frame 16. These do not need to be disconnected during mold changes. A plurality of conduits 20h of similar structure connect the upper liange 80 with the outlet sections 70 of liquid-conducting portions 17. Conduits 20a extend from the side walls of liquid-conducting portions 17, while conduits 20h extend from the upper walls of liquid-conducting portions 17.

Mold 19 comprises inner and

outer walls

82 and 83 respectively defining cooling passages therebetween. The inner walls 82 define the shape of the casting and separate the casting from the cooling chambers in mold 19. The outer walls 83 define the exterior of mold 19 and serve as the walls to which beams 18 are attached. As will be seen in FIG. 4, a plurality of cooling chambers 84 are provided in mold 19. Each of the cooling chambers 84 extends the entire height of mold 19 and is separated from the adjacent chambers by vertical partitions 85. Each chamber 84 has an inlet opening in lower flange 81 and an outlet opening in upper flange 80. Outer wall 83 of mold 19 may be made of any structurally strong metal such as steel or copper, as is known in the art. It is necessary for inner walls 82 to have a high heat conductivity, and for this reason copper is a preferred material of construction for these wa ls.

FIG. 6 shows a piping diagram of the water connections between the mold and the mold-support frame. As already explained, each of the two liquid-conducting portions 17 in the frame 16 is subdivided into inlet and

outlet sections

69 and 70 respectively, the inlet sections being in communication with the lower mold iiange 81 through inlet conduits 20a and the outlet sections being in communication with the upper mold flange 80 through outlet conduits 20b. It will be noted that cooling water passes from an inlet section 69 in one of the liquid-conducting portions through a chamber 84 in mold 19, thence to an outlet section 70 in the opposite liquid-conducting portion 17.

The apparatus is illustrated herein with the mold support frame 16 in metal-casting position on mold oscillator frame 10. Frame 16 is correctly positioned on frame 10 by cylindrical pins 9,0 projecting upwardly from

corner plates

46a, 46h, 46c, and 46d at each corner thereof. These pins are received in cylindrical bores 91 near the ends of tubes 66 in frame 16. The frame 16 is held in place by clamps 93 mounted on

corner plates

46a, 46b, 46c, and 46d. Each clamp has an arm 94 which engages a flange 95 on tube 66, and a handle 96 having a cam surface 97 for moving clamping arms 94 between tight and loose positions.

To remove frame 16, cooling water is shut off at the stationary headers (not shown) which supply flexible hoses 15. Then handles 96 are raised to release frame 16. The mold 19 and frame 16 are then lifted off frame 10 by a crane. Eyebolts 98 may be provided to permit engagement by crane hooks. A new mold and mold-support frame are set in place on mold-oscillator frame 10, and secured by clamps 93. The apparatus is again ready for metal casting.

It will be seen that the novel mold-support frame and oscillator-frame structure of this invention permit changing of molds without the necessity of disconnecting the flexible hoses which supply cooling water to the mold. This saves a considerable amount of time.

Furthermore, in effect the mold-support frame 16 provides a means connected to the mold for supporting the latter and for supplying cooling liquid thereto. The upper portion 12 of the stationary frame portion, with its liquidconducting portion 13 and hose connections 14, provide means for moving this first means up and down with the iiexible hoses or conduits 15 supplying cooling liquid thereto. The first and second means are of course separable. The intertting male and

female members

21 and 22 provide self-acting make-and-break [points] joints disconnecting or reconnecting the cooling-liquid supply between the first and second means as required during their separation and replacement.

The mold-mounting structure of this invention permits rapid changing of molds simply by lifting one mold from the oscillator frame and placement of another mold thereon, without disconnection of any water hoses as was previously necessary. Substantial savings in labor are achieved and down time is held to a minimum.

Certain rfeatures of construction shown and described herein as incidental to my claimed invention, are not part thereof but are the invention of another and will be claimed in an application to be filed. These features include the means for supporting, actuating and guiding the mold oscillator fname 12. More specifically, they comprehend cams 36 and rollers engaged thereby, the motor 37 and shafting connecting it to the cams, the location and mounting of bearing rollers on frame 10, details and location of the guide-roller mechanisms 50, 50a, etc., springs 57 and their mounting on and [connecting] connections to frames 11 and 12, respectively.

What is claimed is:

1. A liquid-cooled continuous-casting mold and mounting means therefor comprising a mold-oscillator frame i11- cluding liquid-conducting portions having hose connections, ilexible hoses connected to said hose connections permitting oscillation of said frame, a mold-support frame having liquid-conducting portions separably supported by said mold-oscillator frame, the liquid-conducting portions of said two frames having mutually registering separable liquid connections forming a Huid-tight seal and permitting passage of a cooling medium therebetween, an open-ended tubular mold having cooling-Water passages supported by said mold-support frame, and conduit means connecting said cooling-water passages with the liquid-conducting portions of said mold-supporting frame, said mold-oscillator frame including a stationary base and a vertically reciprocable upper portion, said vertically reciprocable upper portion including said liquidconducting portions.

2. A liquid-cooled continuous-casting mold and mounting means therefor as defined by claim 1 characterized by said vertically reciprocable upper portion being a rectangle, and said liquid-conducting portions comprising a pair of metal tubes on opposite sides of said rectangle.

3. The mold and mounting means of claim 1 wherein said vertically reciprocable upper portion is a rectangle, and wherein said liquid-conducting portions comprise a pair of metal tubes on opposite sides of said rectangle.

4. A liquid-cooled continuous-casting mold and mounting means therefor comprising a mold-oscillator frame including a stationary base and a vertically reciprocable upper portion, said vertically reciprocable upper portion including liquid-conducting portions having hose connections, exible hoses connected to said hose connections permitting oscillation of the upper portion of said oscillator frame, a mold-support frame separably supported on said oscillator frame, said mold-support frame including liquid-conducting portions located above the liquid-conducting portions of the mold-oscillator frame, said liquidconducting portions of said two frames having mutually registering separa-ble, liquid connections forming fluidtight passage means between said liquid-conducting portions of said two frames, said mold supporting frame also including a supporting beam lixedly secured to said liquidconducting portions in said mold-supporting frame, a vertical open-ended tubular mold having cooling-water passages lixedly supported on 'said supporting beam, and conduit means connecting said cooling-water passages with said liquid-conducting portions of said mold-support frame.

5. The continuous-casting mold and mounting means of claim 4 wherein said vertically reciprocable upper portion of 'said mold-oscillator frame is a rectangle, and wherein said liquid-conducting portions of said moldoscillator frame and said mold-support frame each include a pair of tubes on opposite sides of said mold.

6. Apparatus for mounting a continuous-casting mold comprising a base, a horizontal open frame carried on said base, means guiding vertical reciprocating movement of said frame on said base, means providing separable upper and lower liquid-coolant passages extending along opposite sides of said frame, beams bridging said coolant-passage means, a mold within said frame secured to said beams, relatively permanent connections from said upper coolant-passage means to the mold, exible coolantliquid hose connected to said lower coolant-passage means, and self-acting make-and-break connections between said upper and lower coolant-passage means effecting a break when the upper coolant-passage means is raised from its normal position resting on said lower coolant-passage means.

7. In a continuous-casting apparatus which includes a mold-oscillating frame, a mold-support frame supported on said mold-oscillating frame, an open-ended mold supported on said mold-support frame and having passages in its walls for circulating cooling liquid, and means for oscillating at least a portion of said mold-oscillating frame, said mold-support frame and said mold, the combination therewith of an improved construction for conducting cooling liquid into and out of said passages, said construction comprising liquid-conducting means on said mold-oscillating frame, cooperating liquid-conducting means on said mold-support frame and being connected with said passages, and quick-disconnect means affording communication between' the liquid-conducting means on the two frames.

8. A combination as defined in claim 7 in which the liquid-conducting means on: said mold-oscillating frame includes inlet and outlet manifolds, the liquid-conducting means on said mold-support frame includes inlet and outlet manifolds, and said quick-disconnect means provides registering openings in the respective manifolds.

References Cited The following references, cited by the Examiner, are of record in the patented tile of this patent or the original patent.

UNITED STATES PATENTS 2,348,020 5/19-44 Norris -164-76x 2,871,534 2/1959 Wieland 164-s3x 3,066,364 12/1962 Baier 16e-82 3,098,269 7/1963 Baier 164-283 3,313,006 4/1967 Barbe et a1 164-283 FOREIGN PATENTS 1,069,045 2/1954 France.

R. SPENCER ANNEAR, Primary Examiner U.S. Cl. X.R. 164-128, 260