US2017952A - Chaplet - Google Patents

Description

'R. DlTTY Get, 22, 1935.

CHAPLET Filed Feb. 4, 1935 FIG-3 INVENTOR RALPH DUTY Patented Oct. 22, 1935 PATENT OFFICE CHAPLET Ralph Ditty, Shaker Heights, Ohio, assignor to The Federal Foundry Supply Company, Guyahoga Heights Village, Ohio, a corporation of Ohio Application February 4, 1935, Serial No. 4,785

3 Claims.

This invention relates to an improved chaplet for use in molding operations connected with metal founding, and particularly for supporting a core in a mold while metal is being cast.

One object of my invention is to provide an improved chaplet, portions of which will be readily fusible with the metal of the casting.

Another object of my invention is to provide a chaplet which will be firmly anchored in the casting to resist peening operations if such are necessary.

Another object of the invention is to provide a chaplet which will have a strong central shank portion but which will at the same time be readily fused with the metal of the casting substantially throughout the length of the chaplet shank.

Another object of the invention is to provide a chaplet having a single head for supporting a core and having a. shank for supporting the chaplet in the molding sand, the portion of this shank adjacent the head and adapted to be embedded in the metal of the casting being provided with easily fusible portions so that this part of the shank may become integral with the casting when the latter is poured, and the free end of the shank being provided with surface elements parallel to the direction of insertion of the shank into the molding sand so that it may be inserted into the sand more easily and with minimum disturbance of the sand.

Other objects and advantages will be apparent from the accompanying description, taken with the drawing, and the essential features of my invention will be summarized in the claims.

In the drawing, Fig. 1 is a perspective view of one form of my improved chaplet having a straight shank; Fig. 2 is a sectional view along the line 2-2 of Fig. 1; Fig. 3 is a perspective view of a chaplet similar to that of Fig. 1 with a twisted stem; Fig. 4 is a. perspective view of a single headed chaplet having a shank section similar to Figs. 1 and 2 but having a portion of the shank twistedj Fig. 5 is a section, showing a chaplet in position in a mold.

In metal founding requiring the use of cores, chaplets are used to support the cores in place in the mold while the metal is cast. The chaplets are constructed of material which will fuse with the metal of the casting so that the chaplet becomes burnt in and. becomes substantially an integral portion of the casting. When an impervious casting is desired and the conditions during pouring are such that the chaplet is imperfectly fused in place it is usual to resort to peening. This is a hammering of the metal of the chaplet generally longitudinally of the shank to expand the chaplet metal to fill voids between the chaplet and casting. The chaplet must be securely anchored in the casting to resist this peening action.

My improved chaplet attains a satisfactory fusibility throughout the portion of the shank embedded in the metal of the casting, while at the same time retaining strength, firm anchorage and a volume of metal in the chaplet shank well adapted for peening, if such is necessary.

My chaplet comprises in general a suitable head or heads and a shank which in section, at least as to that part embedded in the casting, comprises a relatively large and solid central portion and other portions extending outwardly therefrom in ribs or the like, it being desirable that these outwardly extending portions end in easily fusible edge portions. The shank may be twisted or straight as desired. One advantage of twist- 2 ing is that it more firmly anchors the shank in the casting when fusion between the chaplet and casting is incomplete and peening becomes necessary. Also leakage is not so easy along a tortuous 2 passage as along a straight one.

In the drawing I have illustrated certain forms of my invention although it will be understood that these are illustrative only and I do not desire 'to be limited in the form of my invention otherwise than by the appended claims.

I' have illustrated chaplets having two heads or a single head. The heads shown are both round and square. Some of the heads are perforated and some solid. Certain of the stems or shanks are twisted, others untwisted, and 3 still another is partly twisted and partly untwisted. I reserve the right to combine these various parts in a single chaplet in any desirable mannerto achieve the various ends pointed out herein. 4

In Figs. 1 and 2 I have shown a chaplet having heads I0 which may be square or round or any other desired form and which may be provided with perforations l I, if desired, to promote fusion and. anchoring of the chaplet'head in the casting. The shank i2 is straight and uniform in section throughout its length, although this shank may be twisted as described in connection with a modification. The shank may be secured to the head or heads by butting and spot welding or by 5 perforating the head for the entrance of the shank which may be thereafter upset or otherwise secured to the head. The shank in section is substantially a polygon having outwardly extending rib portions I3 at its corners.

While I have 55 formed. The outwardly projecting portions I3 at the corners may be in the form of ribs as shown and preferably have sharp edges so as to be more readily fusible in the metal of the casting.

The modification of Fig. 3 shows a double 7 V headed chaplet having solid square heads I4 rigidly connected by a shank 15 similar in section "to the shank of Figs. 1 and 2. Here, however, the

shank'is twisted so as to cause the ribs l3a to lie in spirals about the shank. This form fuses readily into the casting and is somewhat more firmly embedded therein than the form of Figs. 1

' and 2 if a peening operation becomes necessary.

The modification shown in Fig. 4 comprises a chaplet having a single round, solid head It and a shank H which is adapted to support the chaplet in the mold. Those skilled in the art will'recognize that in this iorm of chaplet the free end [8 of the shank is embedded in the sand while the portion I9 adjacent the head is embedded in the metal of the casting after the same is poured. The shank of the chaplet of Fig. 4 is similar in cross section to that described in Figs. 1 and 2. I find that by twisting the portion 19 of the shank adjacent the head so as to provide spirally extending ribs l3b adjacent the head, I obtain a better union between this portion of the chaplet and the casting and also provide a'chaplet which better resists peening if this is resorted to. While the entire length of the shank might be twisted yet I find an advantage accrues by leaving untwisted that portion 18 of the shank which is introduced into the sand, so as to provide surface elements on this portion of the shank'extending parallel to the direction of insertion into the molding sand. That is'to say, the ribs I30 and other portions of the surface of the free end of the shank lying parallel to the direction in which the shank is moved in placing it in the sand, provide no opposition to this movement and the chaplet not only is more readily positioned, but also its introduction is accomplished with'minimum disturbance of the sand. This is well illustrated in Fig. 5, where 20 indicates the molding flask, 2| the molding sand, 22 the core, 23 the casting, and 24 the However, for many purposes I 7 chaplet supporting the core, with the head and twisted portion of the chaplet embedded in the casting and the straight portion of the shank thrust into the sand.

This application a continuation in part of my 5 prior application for Chaplet, filed December 29, 1933, Ser. No. 704,499, to which reference may be had it desirableor necessary.

The terms sand and molding sand" as used in the specification and claims are intended to in- 10 elude any mold forming material used in an analogous manner.

What I claim is:'

1. A metal chaplet having a shank which in section comprises a solid central portion substan- 5 tially polygonal in shape, said polygon having a number of sides expressed by a small number such as four, and said section including outwardly extending portions at the corners of said polygon, said outwardly extending portions terminating in 20 edges formed in a manner. to be easily fusible by heat.

V 2. A chaplet having a singlev head and a shank rigidly connected therewith, said shank being prismatic in form and having a small number of 25 faces of the order of four, said shank havinga portion beginning at the head and extending along the shank and which is twisted and thereby is designed and adapted to be firmly held in a casting, and said shank beyond said twisted portion hav- 0 ing a straight untwisted portion adapted for insertion into molding sand or the like without disturbing the same, the untwisted portion being longer than the twisted portion to thereby stabilize the chaplet in its position in the sand. 5

3. A chaplet having a single head and a shank rigidly connected therewith, said shank being prismatic in form and having a small number of faces of the order of four, said shank having a portion beginning at the head and extending along 40 the shank and which is twisted and thereby is designed and adapted to be firmly held in a casting, said shank beyond said. twisted portion having a straight untwisted portion adapted for insertion into molding sand or the like without disturbing the same, the untwisted portion being longer than the twisted portion to thereby stabilize the chaplet in its position in the sand, and the twisted portion having outwardly projecting flanges extending longitudinally along the angles between prism faces.

RALPH DI'I'I'Y.

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