US814638A - Apparatus for use in manufacturing small metallic pattern-plates. - Google Patents

Description

PATENTED MAR. 6, 1906. P. BONVILLAIN.

ANUFAOTURING SMALL METALLIC PATTERN APPARATUS FOR USE IN M PLATES. APPLICATION FILED MAR.14. 1905.

UNITED STATES PATENT orrron.

PHILIBERT BONVILLAIN, OF PARIS, FRANCE.

APPARATUS FOR USE IN MANUFACTURING SMALL METALLIC PATTERN-PLATES.

To all whom it may concern.-

Be it known that I, PHILIBERT BONVIL- LAIN, a citizen of the Republic of France, and a resident of 6 Rue Blanche, Paris, France, have invented certain new and useful Improved Apparatus for Use in Manufacturing Small Metallic Pattern-Plates, of which the following is a specification, this being a division of my application filed in the United States Patent Ofiice July 29, 1904., under the Serial No. 218,626.

This invention relates to apparatus which, combined together, allow the rapid manufacture of small metallic pattern-plates as used in multiple molding of small castings in foundries; but instead of making a duplex pattern-plate containing on one side the top of the multiple patterns and on the other side the bottom parts of same multiple patterns in which top and bottom of each pattern. must correspond the new apparatus are so combined that they allow the making of small metallic pattern-plates reversible'i. e., having the tops and bottoms of the pattern of one casting or multiple patterns of the same or different casting symmetrically disposed side by side. When ready, three, four, or five of these small metallic pattern-plates, according to size, are inserted in a special frame or pattern-plates table, which form thus assembled constitutes a complete multiple pattern-plate ready for use, and this multiple pattern has the enormous advantage of being variable at will. 6., when the number of copies of one pattern-plate is over the pattern-plate is taken off from the pattern-plate table and replaced instantaneously by another one, so

that the molder never makes more molds than required of each pattern, which is not possible with the present solid multiple-pattern-plate system. It is possible to mold at one time a series of pattern-plates conveniently assembled or juxtaposed but it may'occur that one of these may be required to be molded a less number of times than the others. One may then be withdrawn to obtain a sufficient number of moldings from it, and it may be replaced by another, whereas if the said pattern-plate were made solid with the others this would be impossible, since there would then necessarily result the same number of moldings from each pattern-plate.

In order that the invention may be more clearly understood, apparatus according thereto is illustrated, byway of example, in the accompanying drawings, in which- Specification of Letters Patent.

, Patented March '6, 1906.

Original application filed July 29, 1904, Serial No. 218,626. Divided and. this application filed March 14, 1905. Serial No. 250,067-

Figures 1 to 3 are sectional elevations in the direction of line 3 3 of Fig. 4 of the moldboXes employed for casting a molding-plate arranged in accordance with the successive stages of the operation. Fig. 1 is a perspective view of part of, two superposed frames. Fig. 4 is a plan View of the apparatus shown in Fig. 2. Fig. 5 is a plan of a frame adapted to be inserted between the mold-boxes. Fig. 6 is a sectional elevation of the cast molding-plate in its position on the molding-table, and Fig. 7 a sectional elevation of the molds obtained by means of the molding-plate in their connected position ready for casting.

These apparatus comprise First. Two special frames A and B, closed on their four sides, which when superposed form a complete molding-box, as shown in Fig. 1. Side projections or flanges are provided to assemble them accurately together, either superposed, as in Fig. 1, or placed side by side, as in Figs. 2, 3, and l. It must be noticed that the two sides (marked b b in both frames) are of a particular shape, as shown in Fig. 1 and are provided with grooves to form when assembled together side by side a semicircular groove h, which forms the cen tral line no of the molding-plate. (See Figs. 2 and 3.) Besides, in the edges Z Z semicircular openings are cut at two or three points, as shown in Fig. 1 in order to allow connections between the central and lateral run ners, but not sufliciently large to allow sand to escape when rammed by hand to form a mold.

Second. A special frame (Z with deep side flanges e accurately machined, so as to slide smoothly, but without any lateral play, on the frames A and B, assembled together side by side, as shown in Figs. 2 and 3. This frame at has a central partition f of a special shape having a groove g, provided to obtain on the back of the pattern-plate a rib g, which insures the perfect accuracy of its aXis of symmetry when inserted in the patternplates table.

Third. A special frame 7c, well machined, (so as to be of a perfectly even thickness,) which is inserted between the frames A and B, assembled side by side, and the frame (Z and serves to insure a regular even thickness in all the patternplates, whichare then perfectly interchangeable. The frame Tc has its two internal longitudinal sides grooved, and on these grooves m m slides a rule a, which TIO serves to limit the length of patternlates according to size of patterns or num er of patterns included in each of them.

a Fourth. Two cast-iron block-Weights Z Z, well planed on their smaller fiat surfaces, to load. the whole apparatus when casting patternlates.

Fi th. A pattern-plates table 0, which forms a multiple pattern-plate of which the parts are variable at will, pattern-plates bein very easily inserted in it or taken out to e replaced by other pattern-plates when necessary in order to make only the strict number of copies required of each pattern.

How to make small metal molding-plates: To make a pattern-plate, a first copy of the pattern a is made in the ordinary way, by means of framesA and B. (See Fig. 1.) The top part B, being lifted perfectly truly and level from the part A, is placed side by side to it, and pattern a is taken off from the part A. Part A has the impression of the bottom and inside portion of pattern a, and B has the impression of the top or outside portion of same. This being done, the frame dis put on the top of frames A and B, assembled together, as shown in Fig. 2, and a layer of sand is rammed in it to give the exact counterpart of both above impressions. Frame (1 being removed by lifting it with great care, it is necessary to cut or take off from it part of the sand on all the vertical and inclined walls and to provide ribs wherever necessary to insure sufficient resistance to the pattern-plate to resist the pressure exerted on it when molding. This being done, the frame 7c is put into position, as shown in Figs. 3 and 4, and on the top of it is placed the frame (1 in exactly the same position as before after having limited the length of the pattern-plate by placing a fiat rule n at the right point, accord ing to size of the pattern a. The sectional view in Fig. 3 shows clearly the free space left for the metal that will form the patternplate, cylindrical and annular openings, as shown at i and j, being provided to form parts to support the center parts of the patternplate in the operation of molding and prevent it from bending under pressure. Cast-iron blocks Z Z having been put on the top of the frame cl, planed faces downward and arranged to cover exactly the openings i and j, the metal is poured into the mold thus formed. The pattern-plate thus obtained has therefore on its upper face two distinct impressions, one corresponding to the internal or top shape of the pattern a, while symmetrically disposed side by side is the internal or bottom shape of same pattern ai. 0., a

small pattern-plate having on its medial line a half-round projection to form the runner in the mold with runners from the central part to the patterns and lateral ribs for fixing on the patternplate table. Onthe opposite face the pattern-plate has a shaped rib g, formed by the groove 9, which is to engage in a groove of similar shape on thepattern-plate table 0, which determines the exact position of the pattern-plate. The pattern-plate thus made is ready to be inserted in the patternplate table 0. To do this, the rib formed by the groove 9 and cylindrical and annular projections formed by the openings 1' and j are placed downward, the rib g fitting exactly in the groove (1 on the central partition of the pattern-plate table 0. (See Fig. 6.) Lugs s on a frame 1, placed opposite lugs t of the pattern-plate table 0, bear eccentric bolts 10, which being revolved press bars 1" against the table and the edges of the pattern-plate, thus fixing it firmly. This being done, if we take two successive impressions of the patternplate thus obtained and if we put the second impression on the first one, left-hand side over right-hand side, we have two complete molds of pattern a. (See Fig. 7.) In this double mold the impressions left by the semicircular projections ac in each of them are superposed on each other perfectly accurately, forming a cylindrical channel 1 through which metal is poured into the mold. (See Fig. 7.)

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is The complete apparatus for manufacturing pattern-plates used in foundries consisting of in combination, two similar frames having two faces and their edges machined, a frame adapted to cover the above-mentioned frames and to fit on their edges and provided in the center with a rib at the bottom so as to I

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