US1895219A - Means for drying mold copes - Google Patents

Description

Jan. 24, 1933. E.'F. BEGTRUP MEANS FOR DRYING MOLD COPES Filed April 9. 1932 2 Sheets-Sheet illlll E INVENTfDZiiS B dwa/rd eg a QR MN ms ATTORNEY Jan. 24,- 1933. r E. F. BEGTRVUP 1,895,219

MEANS FOR DRYING MOLD COPES Filed April 9, 1932 2 Sheets-Sheet 2 INVENTOR Edward 1 1369621 BY M HIS ATTORNEY Patented Jan. 24, 1933 EDWARD F. ma ner, or JERS'IE'Y crazy, NEW JERSEY mnimsron nRYINGmonn-oorns Application .nled April 9, 1932 fseriai no." 504,200.

g The invention relates to certaininiprovements in the welding of railway rails and the;

like by the aluminotherlnic or analogous m:

ess, which includes the emit-si of the rail ends in a mold of refractory material toreceive the superheated molten metal which effects the weld, the mold, when employed in.

the application of the methodwithout inter rupting traflic, usually comprising a longitudinally divided lower mold section and a cope section adapted to be applied to the lower section; the instant invention having for its object an improved means forefiecting the V; drying and curing of the cope, section by the otherwise waste heat duringthe usual preheating of the mold and enclosed rail ends.

In a companionapplication,there is described a novel form ofhood designed to accelerate the'preheating of the rail heads and toefi'ect a material economy in time and fuel, and the present invention contemplates the association with a hood, preferably of the type referredto, of means for supporting .the refractory cope member of the mold'immediately above the hood and close enough to be within the zone of radiatedheat from the heated hood, so that the refractory material of the cope will be efiectively dried and preheated ready for application tothe "body of the mold immediately prior to the pouring, or teemingof the superheated molten metal into the mold to effect a weld. s y The invention is illustrated in the accompanyin'g drawings, in which Fig. 1 is a plan'view of a typical mold applied to the welding of girder or trilby rails having the hood and the cope support applied thereto.

Fig. 2 is a sectional elevation on line 2-2 of Fig. 1, the cope support and bail being shown in full elevation. V

Fig. 3 is a side elevation of the hood and cope support. r

Fig. 4 is a perspective view thereof. V Fig. 5is a bottom plan view of the hood. In alumino-thermic rail welding without interruption to traific, it has been customary to use a three part mold, the lower portion of which comprises two halves designed to en- 59 close the rail ends to substantially the level o of the tread surfaces of the rails,soas to leave the tread and thegauge faces or the flanges J of therails free, whereby the wheels of traffl fic may pass over the appliedmold without contacting the latter. The lower mold sections are provided with the usual cavities to receive'the molten metal which efiectsfthe welding together of the rail ends. The rej fractory cope or complementary mold section I is formed tofit the contour of the tops ofthe v rail ends and to engage the upper faces of the lower mold'sections to complete the enclosing of the rail ends. 1 p Durin the preheatingof the railends by means 0 hot gases introduced into the mold,- by means of-a blow torchor similar appara tus, th'eglower mold sections become thorough- 'ly baked and dried, but the upper or cope.

section cannot be effectively dried. or baked during the preheating of the railen'ds, be-y cause: 0 the necessity offrequently removing ithe "cope section to permit passage of traflic. 1

Furthermore, the preheating of-the rail ends" may be greatly facilitated and expedited by the substitution of a reflecting hood for the. A; refractory cope, which will have the effect of i directing the products of combustion .down- V ward against the rail heads before said prodnets are vented, preferably, along the facesof the rail heads. It is, therefore, regarded as uneconomical and impracticable" to effect thepreheating of the. mold with the cope in; ,The. welder is, therefore, conosition. v fronted with the problem of separately drying the refractory cope, because, for best results in rail welding, operations, it should be completely "dry when itis finally applied to" the lower mold sections andthe superheated molten metal is poured to effect the weld, It has, therefore, been customary either to bakethe refractory copes in suitable ovens or furnaces removedfrom the railrwelding opera tions and' apparatus, or, to be satisfied with mediocre and some times unsatisfactory re-.

sults by placingth'e cope in position upon the mold for short periods during the preheating operations inan attempt to effect at least a,

surface drying. of therefraetory materialof the mold? The present invention" contemplates 1 rovision' of means for efiectivel'y preheati mg the rail ends and the lower sections of the a mold with a minimum expenditure of time andpreheating fuel and simultaneously to effect the drying and preheating of the cone 7 sections, thereby eliminating the use of separate ovens and furnaces heretofore emplo ed for the latter operations, when the best results were sought, and these means are exemplified in the accompanying drawings as applied to a mold for effectingthe alumino-thermicwelding of girder or trilby rails.

, V In Fig. 2 of the drawings, 1 and 2indicate -.the lower mold sections, which contain the 1 usual'joint defining cavities about the base, web and under faces "of the rail heads, the

' mold sections extending to substantially the V levelof the tread and flange surfaces of the heads and the mold cavity opening through the top of the mold sections adj acent: the rail headsp? Spanning the openinginjthe top of the body of the mold is a hood 3, comprising a perpendicular side walls 4:, the lower edges' of which. conform to the top of the mold and to the upper faces of the rail heads, except for cut away portions. adjacent theheavier per-- tions of the rail heads to form vents 7" Th top and side wallsof the hood 'are formed' by double arches 5 and 6, the lower edge's'of which contact the top of the mold, the two v arches meeting above and in substantial align ,ment with the rail heads. Secured to the side walls 4 of the hood is a bail,8,'which serves as'a convenient means for applying and removing the hood, and fastenedto the vertical legs of this bail is a rectangular rack 10 over lying the hood and which may be conveniently' formed of angle irons adapted to receive and support the upper flask'section 11 containing the refractory cope 12.

From the foregoingdescription, it will be apparent that, when the hood '3, with thererail ends and will be vented ultimately at the openings 7 along the faces of the rail heads;

a The hot gases will heat the metal of the hood to arelativly high degree and the heat'radi ated. therefrom will impinge the bottom of the refractory cope and thereby dry the late ter to a sufficient extent to enable it to be'applied to the lowermold sections without further drying or curing preparatory to'teem 'ing the superheated molten metal into 'the moldfthatisto say, theirefractory material of the cope will be efl'ectively dried by the waste heat from the preheating operation and may be removed from its supporting rack' above the hood, and, when the latter;

served its urpose 'and'been removed, the 1 cope may e applied immediately to its proper positionon the top of the lower mold sections,

A further advantage of this arrangement is, that the drying of the cope by the radiated heat from the hood continues at all time dur-t ingthe preheating of'the rail ends, because when the hood is'removed to allow the pas- I sage of car wheels, the relative position of thehood andcope i slstillmaintained and consequently the drying continues. WhatIclaimis:

1.1A removable hood adapted to span the open topof arrail" welding mold during preheating of the latter, and means, carried by and ove'rlyingfthe hood for supporting amold cope section immediately above the" hood whereby; the mold cope section may be dried and cured by heat'from the hood.

2. A hood for welding" molds, comprising a bodyportionada'pted' to span the open top of the mold during preheating of the'latter, v

and a mold cope supporting rack attached to and overlying said body portion whereby the mold cope section may be dried and cured by heat from the hood.

3. A hood for welding molds, comprising a body portion'adapted to span the open top, ofv the mold during preheating ofthe latter, a handle connected-to the body portion, and a mold copesupporting rack secured to the handle and overlying thebodypo'rtion;

4. A hood for' welding'molds, comprising a 'body portionfadapted to span the open top of the mold during preheating of the latter,

a bail connected to the body portion and spanning'the top thereof, and'a mold cope supporting rack secured between the, side members of the bail. V

5. A hood for welding walls that double arched top, a'b'ail fixedto the sidewalls 'a'n'd spanning the top ,and 'a' mold cope; supporting 5 rack secured between the side members of the bail."

In testimony whereof I aflixmy signature; ,BEGTRUP. o

, I molds, comprising 1 I i a body portionadaptedtosp an the open top ofthe' mold and having" perpendicular side

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