US2124639A - Foundry jacket - Google Patents

Description

July 26, 1938. w; J. SPENSLEY 2,124,639

- FOUNDRY JACKET Filed Nov. 3, 1937 "IN llnllllllillllfllllllll Patented July 26, 1938 PATENT OFFI C FOUNDRY JACKET William J. Spensley, Dubuque, Iowa, assignor to The Adams Company, Dubuque, Iowa, a corporation of Iowa Application November 3, 1937, Serial No. 172,536

5 Claims.

This invention relates to foundry jackets and .has special reference to a metal foundry jacket of improvedformand to a novel method for making the same.

While. foundry jackets are of relatively simple construction, yet numerous difficulties arise in the manufacture .of jackets which will give satisfactory service over a long period of time, due inv a large measure to the severe-conditions under which they are used and to the rough treatment given them by the workmen. They are subjected to rapidly changing temperature which at times becomes very high, and to the prolonged action of very hot gases produced in the casting of metal, which influences tend to damage the metal from which they are made and to warp the sides of the jacket which renders them useless because they will no longer properly fit the molds. When they become warped in this fashion it has been necessary, in the past, to discard the jackets, and thus incur a considerable financial loss.

Important objects of the invention are the provision of a foundry jacket having improved structure resulting in greater strength and lighter weight, which causes the rapid dissipation of gas away from the surface of the jacket to prevent pocketing of the gas against the surface and resultant uneven temperature, which structure permits of replacement of any part of the jacket when damaged without special fitting, and which resists distortion of the jacket in use.

Another object of the invention is the provision of a method for making foundry jacketswhich 35 includes the step of casting suitable side plates and wherein plates from the same molds may be used in the making of diiferent types of jackets.

Otherobjectsand advantages will become apparent from the following description and the accompanying drawing, in which Figure 1 is a perspective view of a jacket embodying my invention;

Fig. 2 is a fragmentary side view showing one corner of a jacket in which the opposed side walls are parallel;

Fig. 3-is a fragmentary side view similar to Fig. 2 showing a jacket in which the side walls are tapered;

Figs. 4 and 5 are top views of Figs. 2 and 3, and

Fig. 6 is a section through an end wall.

The invention contemplates a foundry jacket formed substantially entirely of cast metal of which aluminum or cast iron is preferable. Such jackets have been known in the past but their construction has been such that they are open to a number of serious disadvantages both from the standpoint of the manufacturer and of the user. According to the present invention, I make four cast plates designated generally by the numerals 1, 8, 9 and I I, the plates I and 8 being identical and formingthe sides of the jacket, and the plates 9 and II being identical and forming the end walls of the jacket, These plates are 30 cast with a plurality of vparallelly disposed transversely extending grooves I2 which are spaced longitudinally of the plates on the inner surface thereof. In the present instance these grooves are spaced about three to the inch and form therebetween aplurality of transversely extendingribs I3. The-grooves have sloping side walls .asshown at I4 and the ribs have flat upper surfaces as shown at I5 formed by grinding or otherwise trimming the upper edges of the ribs as by grinding .in a fiat bed grinder so that all of the upper surfaces .or crowns of the ribs are coplanar. The grooves I2 extend the entire distance across the plates and terminate directly on the edges thereof .as shown at I 6 (Figure 1). The outerlsurface ofthe plates. .is provided with grooves IT and. ribs I8 identical in every respect with the grooves I2 and ribs I3, with the exception. that the tops of the ribs are not finished in themanner of the ribs I4, the casting merely being cleaned off on the outer surface in the usual manner. The outer surface of the side members I and 8 is provided with spaced brackets I9 and 2| at one end thereof and 22 and 23 at the opposite end thereof, the brackets beingpreferably cast integral with the plate. The plates 9 and II likewise have brackets 24, 25, 26 and 21 spaced from the edges of the plates in the same planes as the brackets of the plates 7 and 8. The end plates 9 and II are further provided with outwardly extending handle members 28 castintegral with the plates.

vvAfter the casting of the plates and the grindingof the inner surface thereof, the edges of the platesare ground or otherwise trimmed to a proper bevel as shown at I 6 and to open the ends of all of the grooves I2. Likewise the ends of each of the plates are then ground to a slope as shown in Fig. 2 in such manner that'the lower edges of the plates are longer than the upper edges thereof, as will be apparent from Figs. 2 to 5.

The plates are held together at their corners to form' a rectangular structure by means of lower corner members 29 and upper corner mem- 55 bers 3i seated on the brackets of the plates. Thus, the corner member 3| is seated on brackets 22 and 24 of the plates 8 and II, spanning the corner formed by these plates, and likewise, the corner member 29 seats upon brackets 23 and 25 of the plates. similarly spanning the corner. The corner member 3| is secured to the brackets by means of bolts 32 and 33, and the corner member 29 by means of bolts 34 and 35 which pass through holes in the brackets 22 to 25.

These holes are drilled into the brackets while' the plates are rigidly held in fixtures so that the holes always occupy the same relationship with respect to each other and with respect to the plates. It will be seen that the plates are likewise secured together at each corner by means of corner members 36, 31, 38, 39., etc. secured to the plates in like manner, thus fixedly and rigidly holding the plates in the form of a rec-' tangular jacket structure.

In the manufacture of jackets of this character, it is necessary for the manufacturer to provide jackets of the same size at the base but having different degrees of taper. For example, the form shown in Figure 1 is a jacket having a taper of about A" per foot per side, whereas in Fig. 2 the jacket has vertical side walls having no taper. In order to manufacture jackets from the same molds having any desired degree of taper I have provided the plates with sloping ends as shown in Fig. 2, and provide a series of corner members having the distance and relationship between the bolts 32 and the bolts 33 varied through the desired range by steps so that by selecting the proper corner member and securing the same in place on the brackets, the resultant jacket has the desired taper in the side wall. This is illustrated from a comparison of Figs. 4 and 5. Thus, in order to impart the greater taper shown in Figs. 3 and 5, corner members 4| are employed in which the distance and relationship between the two bolts 32 is the same as that found in Figs. 2 and 4, and likewise the distance between the bolts 33 is the same as in Figs. 2 and 4. However, it will be seen that the distance between the bolts 32 and "the top and bottom of the side walls there is no possibility of heated gases being trapped adjacent the side walls of the jacket during the casting operations. The size of the jacket is determined by the plane of the upper edges of the ribs 5 3 and consequently when the jacket is applied to a mold the upper edges of these ribs bear against the sand of the mold leaving the grooves l2 exposed, which thus form conduits for conducting the gases away from the mold and prevent their accumulation adjacent the surface of-the jacket.

This meansthat in use the jacket rapidly assumes a uniform temperature which materially prolongs the life of the jacket. Furthermore, the ribs l8 on the outer surface function as radiating fins tending to' dissipate the heat in the metal. As a result of this construction, foundry jackets made in accordance with this invention never acquire in use anywhere near the high temperature reached by the usual metal jacket. This is further facilitated by the fact that the metal is relatively thin in the areas where the inside and outside grooves pass each other. This means a material reduction in Weight and yet because of placement part which can then be installed in the old jacket without any fitting whatever, and the resultant jacket will have the proper taper and fit. This is possible because of the fact that the holes in the brackets are uniformly spaced and are inserted therein with the plate in a fixture so as to obtain uniformity in production. It is further made possible because the jacket is formed of four separate cast plates, any one of which is removable by removing suitable bolts.

While I have thus described and illustrated a specific embodiment of the invention I am aware that numerous alterations and changes may be made within the spirit of the invention and I do not wish to be limited except as required by the prior art and the scope of the appended claims, in which- I claim:

1. A foundry jacket comprising four independent side members adapted to be connected together at their ends to form a rectangular structure, each of said members having the inner surface provided with parallelly disposed grooves closely spaced along the entirelength thereof, said grooves terminating at the edges of said side members for communication therewith behind the inner plane of the member, and having closely spaced grooves on the outer surface thereof extending longitudinally of said plates, spaced brackets at each end of said members having prearranged holes, corner members shaped to span the corners of said structure and seat on said brackets, and bolts passing through the corner members and said brackets to retain said side members in prearranged relationship as deter mined by the size of said corner members.

2. A foundry jacket comprising four independ ent cast metal side members adapted to be connected together at their ends to form a rectangular jacket structure, each of said members having an inner surface provided with transverselyextending parallelly disposed grooves closely spaced along the entire length thereof, said grooves extending completely across the side members and terminating at the edges thereof for communication therewith behind the inner plane of the member, said members also having closely spaced grooves on the outer surface thereof extending longitudinally of said plates providing small areas of thin cross-section in the regions where the inner and outer grooves cross for reduced weight and rapid dissipation of heat, spaced brackets at each end of said members having holes in prearranged relationship, corner pieces shaped to span the corners of said jacket structure and seat on end brackets of adjacent sidemembers,

and bolts in spacedrelation on the corner members and passing through the holes of said brackets to secure said side members in prearranged relationship as determined by the size of said corner members. 1

3. A foundry jacket of cast metal comprising plates secured together at their ends to form a rectangle, each of said plates having an inner surface provided with transversely extending parallelly disposed grooves closely spaced along the entire length thereof, said grooves extending completely across the side members and terminating at the edges thereof for communication therewith behind the inner plane of the member, said members also having closely spaced grooves on the outer surface thereof extending longitudinally of said plates providing small areas of thin cross-section in the regions where the inner and outer grooves cross, for reduced weight and rapid dissipation of heat.

4. The method of making a foundry jacket comprising casting flat metal plates with transversely extending parallelly disposed grooves on one side thereof providing intermediate upstanding ribs, said grooves being closely spaced along the entire length thereof and extending completely across said plates, with parallelly disposed closely spaced grooves on the opposite sides of the plates extending lengthwise thereof, and with outstanding brackets on the last mentioned sides adjacent the ends of said plates, grinding the ends of said plates on a slope, finishing the surface of said plates to produce coplanar upper edges on said ribs, securing said plates in a fixture, drilling holes in' said brackets according to a uniform pattern, and securing said plates together in the form of a rectangle by connecting the brackets at abutting ends of said plates by means of corner members of a shape dependent upon the taper of said jacket, and bolts received in said drilled holes.

5. The method of making a foundry jacket comprising casting flat metal plates with transversely extending parallelly disposed grooves on one side thereof providing intermediate upstanding ribs, said grooves being closely spaced along the entire length thereof and extending completely across said plates, with parallelly disposed closely spaced grooves on the opposite sides of the plates extending lengthwise thereof, and with outstanding brackets on the lastmentioned sides adjacent the ends of said plates, grinding the ends of said plates on a slope, finishing the surface of isaid plates to produce coplanar upper edges on said ribs, securing said plates in a fixture, drilling holes in said brackets according to a uniform pattern, and connecting said brackets by means of any of a plurality of corner members dependent upon the relative slope to be imparted to said side walls to produce a jacket of any desired taper.

WILLIAM J. SPENSLEY.

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