US1535802A - Method of multiple casting - Google Patents

Description

April 28, 1925.

v. F. B ENDIXEN METHOD OF MULTIPLE CASTING Filed July 18, 1923 2 Sheets-Sheet 1 Qwvwnfoc 4 7 V. F; BENDIXEN METHOD OF MULTIPLE CASTING April 28, 1925.

Filed July 18, 1925 ,2 Sheets-Sheet 2 f atented Apr. 28, 1925.

UNITED STATES VICTOR F. BENDIXEN, 0F CHIGAGD, ILLINOIS.

METHOD OF MULTIPLE CASTING;

Application filed July 18,

To all whom it may GORGGWL."

Be it known that I, VICTOR F. BENDIXEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Method ofMultiple Casting, of which the following is a specification.

This invention relates to a new and imfplfivetl method of casting whereby, with practically the same equipment as ordinarily used, the output can be doubled.

Afurther object is to provide a method requiring practically no more labor in the preparation of the mold than is required in arranging the mold to produce approximately one-half the number of articles at one casting operation following the old method of casting. v

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists in certain novel steps in the method hereinafter described and illustrated in the drawings, it being understood that various changes maybe made in the method without departing from the spirit of the invention as claimed.

In the accompanying drawings- Figure 1 is a section through the drag of a mold and showing the same assembled with a draw plate and a pattern in carrying out the first step of the method.

Fig. 2 is a section showing the draw plate, positioned on top of the drag and assembled with the cope, pattern, and sprue pin.

Fig. 3 is a section through the assembled drag and cope with the core supported therebetween.

. Fig. 4 is an elevation of a multiple casting that can be produced, and showing the connecting vertical sprues.

Fig. 5 is a plan view of the multiple casting, the main vertical sprue being in section.

In trying out the method constituting the present invention a flask of usual or any preferred construction is used. The pattern, indicated at 1, and which can be formed with the usual horizontal gate horn 2 is placed on a draw plate 3 after which the drag t of the flask is placed on the draw plate and sand 5 packed in the usual manner around the pattern and within the drag. The drag is then inverted and the draw plate and the pattern removed therefrom. This will leave in the sand in the drag an impression of the pattern, said impression having been indicated at 6 in Fig. 2. The

1923. semi no. 652,414.

draw plate 3 is then placed in position on the drag as shown in Fig. 2 with the pattern l resting thereon. The cope 7 is placed on the draw plate andsand is packed therein in the usual way as indicated at 5. A sprue pin 8 is first placed in the cope so as to extend down to the pattern. Thus after the sand has been packed and the pin 8 and the pattern 1, have been removed, there will be left in the cope an impression of the patternand also a vertical gate indicated at 9 in Fig, After the pattern impression has been made in the sand in the cope, a core 10 is placed between the sand. contained intliecope and drag, the said core being so shaped that its opposed faces are duplicates and the metal receiving faces above and below the core are also duplicates. Gates 11 are formed in the core at suitable pointsso as to establish communication between the upper and lower gates of the cope and drag.

After the parts have thus been assembled, as shown in Fig. 3, the molten metal is poured into themain gate 9 and will spread through the horizontal gate 12 and the vertical gate 11 so as to fill all of the cavities in the flask. Thus whenthe molded structure is removed from the flask it will be found to consist of oppositely disposed sets of similar castings indicated at 0, these castings being connected by horizontal sprues H and vertical sprues V while a single main sprue M extends upwardly from the structure. These sprues can be removed from the casting and thus it will be seen that by following the method described, the capacity of a flask can be doubled with practically no added cost.

It will be apparent that when casting, the sprue gate 9 will be sufficient to act as a vertical feed gate for the mold. In case the runner gate horn gate--is forn'ied in the core this gate becomes at the same time a vertical sprue gate.

Various shapes of castings can be pro duced as desired and it is to be understood that any standard flask including snap flasks, can be used without altering them.

It will be obvious that instead of providing the pattern with portions for making impressions of the horizontal gate, the said gates can be cut in the sand.

For practical reasons it may be of advantage to have a different pattern for the cope than in the drag. This can be accomplished lllt) llO by having a different pattern on the reverse side of the draw plate or having a difierentpattern on a replica draw plate. The molding operation remains practically the same as described above.

hen for any reason, the drawboard is not wanted the process will slightly difler from the above described and the process will be as follows: Placing the drag on a regular bottom board, positioning a core with holes for vertical gates inside the drag, positioning the pattern on the core, packing sand within the drag, around and upon the pattern and core, inverting the drag lifting out the core, drawing the pattern, replacing the core, positioning the pattern on the core or on a bottom board, placing a copeon the drag oron the bottom board, packing sand within the cope and around and upon the pattern and around a sprne pin within the cope, removing the pin, drawingthe pattern, replacing the cope on the drag and then pouring metal in the mold.

It may also be desirable to use a difl'erent pattern in the cope than in the drag. This is accomplished by simply positioning the other pattern in place of the one already used on the core or bottom board. Other- Wise the operations remain the same as described above.

What is claimed is The method of multiple casting which includes forming a pattern impression in each of the opposed members of a flask, said in'ipressions being duplicates, interposing between the impressions a core having its opposed faces duplicated and extending equally into the respective impressions, said core being formed with vertical gates extending therethrough, there being horizontal gates in the mold members communicating with the vertical gates, and then pouring metal into the mold.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

VICTOR F. BENDIXEN. lVitnesses:

A. FREEBERG, BERNIE RONNEBERG.

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