US2651823A

US2651823A - Chaplet

Info

Publication number: US2651823A
Application number: US270389A
Authority: US
Inventors: Harvey F Hohlfelder
Original assignee: F HOHLFELDER Co
Current assignee: F HOHLFELDER Co
Priority date: 1951-01-09
Filing date: 1952-02-07
Publication date: 1953-09-15
Anticipated expiration: 1970-09-15

Description

Se t. 15, 1953 H. F. HOHLFELDER CHAPLET Original Filed Jan. 9, 1951 1N VEN TOR. Harvey E Hoh/fe/dw Patented Sept. 15, 1953 CHAPLET Harvey F. Hohlfelder, North Perry, Ohio, assignor to The F. Hohlfelder Company, Cleveland, Ohio, a corporation of Ohio Original application January 9, 1951, Serial No.

205,096. Divided and this application February 7, 1952, Serial No. 270,389

3 Claims.

This invention relates to chaplets for use in supporting cores in foundry molds, the chaplets being made from a single piece of wire. The chaplets are two-headed, i. e., they comprise a stem and a head at each end of the stem, the heads lying in planes extending substantially at right angles to the axis of the stem. In the use of the chaplets, one head rests against the mold and the other head supports the core. The construction of the chaplets is such that they have chaplet without entrapping gas which would a firm support in the mold cavity and firmly supform gas pockets in the casting. The formation port the core so that they will not shift with of gas pockets in a casting not only is objectionrespect to the mold cavity. able from the standpoint of producing an un- This application is a division of my copending sound casting, but also because it tends to preapplication Serial No. 205,096, filed January 9, vent complete fusion of the chaplets. Inthe pre- 1951. ferred form of chaplet which is illustrated, the

In the accompanying drawings which illustrate inside diameter of each of the coils l3 and I4 a preferred embodiment of my chaplet and the is approximately twice the length of either of the method of making the same straight leg portions H or I2, thereby insuring Figure 1 is a perspective view of a chaplet; adequate spaces 15 and lfifor preventing entrap- Figure 2 is a vertical section through a mold ment of gases in the casting. illustrating the manner in which the Chaplets The provision of the straight leg portions H may be used; and I2 between the coils l3 and I4 and the base Figure 3 is a, side elevation and Figure 4 is an [0 which forms the stem of the chaplet gives end elevation of the gripping dies and wire used added rigidity to the chaplet, thereby decreasing in carrying out the first step of my method; the tendency of the core to shift in the mold Figures 5 and 6 are views similar to Figures 3 cavity. It also results in firmer seating of the and 4, respectively, but illustrating the second heads [3 and it against the core and the mold step of my method; than could be obtained if the straightleg por- Figures 7 and 8 are views similar, respectively, tions I l and I2 were omitted. to Figures 3 and 4, but illustrating the third step After the chaplet has been formed from a of my method; and single piece of round wire into the general shape Figures 9 and 10 are views similar, respectively, shown in Figure l, as hereinafter described, the to Figures 3 and 4, but illustrating the fourth step heads l3 and I4 and the straight leg portions I l of my method. and I2 are flattened by pressing them against Referring more particularly to the accompanythe gripping dies used in forming the chaplet. ing drawings, Figure 2 illustrates the use of the The flattening of these parts of the chaplet inchaplets in a molding operation. The mold comcreases the seating area which rests against the prises the usual bottom board 2, drag 3 and cope mold and the core, thereby providing firmer su 4 in which a mold cavity 5 has been formed by port for the core. ramming sand 6 against a pattern not shown. Figures illustrate the Various Steps n The core 1 is supported within the mold cavity making the c p Shown i Figure l. The first by the chaplets 8. Molten metal is poured into step of the method is illustrated in Figures 3 and the mold through a gate 9 leading to the mold 4. A wire, rod or the like designated by reference cavity. numeral 20 is fed between gripping dies 2! and Referring to the other figures and more par- 22 and the dies are brought together to grip the ticularly to Figure 1, the chaplet according to wire within the hole 23 formed by the dies. The my invention is made from a single piece of wire. wire 20 is then cut off to suitable length for form- It comprises a centrally located U-shaped portion ing a chaplet, the

ends

24 and 25 extending rehaving a base I0 and two legs H and 12 extendspectively beyond the

faces

26 and 21 of the dies. ing at substantially right angles to the axis of In the next step of the method which is illusthe base [0. These legs II and I2 are substantrated in Figures 5 and 6, the

ends

24 and 25 of tially straight and extend radially from the base the wire are bent at right angles to the portion [0. The straight leg portion H is extended and 28 of the wire which is gripped by the dies, Thi coiled into an open single-turn coil l3 lying in bending operation produces a, substantially U- a plane extending substantially at right angles to the axis of the base l0. Similarly, the lower straight leg portion I2 is extended and coiled into an open single-turn coil Hi which lies in a plane extending substantially at right angles to the axis of the base Iii. The coils l3 and i4 provide substantial spaces l5 and [6, respectively, so that when the chaplet is in use, molten metal can flow readily into contact with all exposed parts of the shaped piece having a base 28 and two

straight legs

24 and 25.

In the next step of the method which is illustrated in Figures 7 and 8, the dies and wire are brought adjacent to a twirling or coiling machine --not shown-and the

ends

24 and 25 are coiled into the si'ngleloop open coils 1 3 and [4 shown in Figure 1. This coiling operation is carried out in such manner as to retain the straight leg portions II and 12.

In the next step of the method which is illustrated in Figures 9 and 10, the-dies and-formed wire are brought adjacent aypress notshown, which presses the coils I3 and I4 and the straight leg portions H and I2 against the die so as to flatten them. V

In the next step of the method, not illustrated, the dies are opened and the chaplet is ejected therefrom.

Although I have illustrated and described a method of making a-chaplet having the round heads l3 and 14, the method is applicable-to theformation ofchaplets having square or other shaped heads which can readilybe obtained by slight modificationofgthe head-forming mechanism.

While the invention is not limited to the use of any particular size of Wire, the wires most generally-used range from about 1%" to /4' diameter.

From the-above "it -will be seen that I have provided a-two-headed unitary chaplet which-can be'made 'in'a relatively simple manner. The chapletprovides good seating andsupport against both;the moldan'd the-'coreand is ofsuch constructionparticularly due "tothe provision of the straight legportions II and and the open spaces l5 and l6,that:the'chapletsare relatively rigid and strong 'an'd inuse do not-give ris to gas pockets in the castin operation.

The invention is not-limited to the. preferred embodiment but may-'=be'- otherwise embodied or practiced Within the scope of the following claims.

I claim:

1. A chaplet adapted to be positioned substantially entirely within the metalreceiving cavity ofa mold and for suipportinga core or the like therein, said chaplet comprising a single "length tially entirely Within the metal receiving cavity of-a=mold -andfor-supporting a core or the like therein,-=said'-chaplet comprising a single length of wire the :eentral ;portion of which is formed into a connecting stem and the end portions "of which"are"formed"into supporting heads, one at each en'd of the stem, each of said heads consisting of a singleturn of the wir and the adjacent-end of the connecting stem being positioned in a plane substantially at right angles to the main portion of.the stem and being open so as to permit the escape of. gas 1 therethroug'h, the outer face of each head being flat to provide bearing surface -for the chaplet in the mold cavity.

3. A chaplet'adapted'tobe positioned substantially entirely within the metal receiving cavity of a mold and for supporting-acore orthe like thereingsaidchaplet comprising a single length of Wire, thecentralvportion of which is formed into -a connecting stem and the endrportions of which are formed'intosupporting.heads, one at each end of the stem, each' of-said heads comprising substantially one coil of the wire integrally connected With-lthe stem :by:=a leg portion extending at substantially right angles to the stem; the heads: bein'gr positioned in planes substantially at right angieszto thestem and being open so as to permiti-thexescapeiofagas therethrough.

HARVEY 'F. HOI-ILFELDER.

References Cited in the file of this patent UNITED-STATES PATENTS Number Name Date 357,388 Eriksennas '=Nov.-2, 1920 1,563,480 Gibson-in. "113cc. 1.- 19 5 1,987,048 Brunst Jan.- 9, 1935