USRE12886E - bonvillain - Google Patents

Description

, P. BONVILLAIN. APPARATUS FOR MAKING PATTERN PLATES.

APPLICATION FILED JAN. 28, 1908.

Reissued Nov. 24,1908.

2 SHEETS-SHEET'I.

rm: NORRIS rzrnu'cu, WASHINGTON, :2y I:

P. BONVILLAINF APPARATUS FOR MAKING PATTERN PLATES.

APPLICATION FILED JAN. 28, 1908.

12,886. v Reissued No'vp24, 1908.

2 SHEETS-SHEET Z.

in: "cams PErERs co., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

PHILADELPHIA, PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

APPARATUS FOR MAKING PATTERN-PLATES.

No. 12,886. Specification of Reissued Letters Patent. Reissued Nov. 24, 1908.

Original No. 843,066, dated February 5, 1907, Serial No. 218,627. Application for reissue filed January 28, 1908. Serial No. 413,128.

To all whom it may concern: them has two half-holes (Z (Z, disposed 011 the 55 Be it known that I, PHILIBERT BoNvIL-- line y, and holes 6 e on a line perpendicu- LAIN, a citizen of the Republic of France, lar to the line 00 y, the half-holes (Z (Z being and a resident of Paris, France, have in equally distant from the holes 6 6, so that vented certain new and useful Improvements when the parts a, and b of the flask are placed in Apparatus for Making Pattern-Plates, of one upon the other, Figures 1 and 2, the which the following is a specification. four half-holes (Z (Z on joint plane a2 1 and In mechanical molding, notably, it is comthe two holes 0 e are alined, while when the mon to employ instead of pattern plates two parts are arranged side by side, Figures 10 known as pattern-plates, these having 3 and 4, the centers of the two complete upon one face both the lower part and the holes formed by the four half-holes (Z (Z and upper part. of a pattern, the two parts being the centers of the two holes 6 e are located symmetrically disposed. If two moldings exactly at the four corners of a perfect be taken from such a pattern-plate in two square.

15 flasks and then the two flasks be super- In a foundry the flasks a b are chosen of posed so that the print of each upper part such form and size that they will accommoregisters with the print of each lower part date the largest patterns with which they of the pattern, then two complete moldings are intended to be used. These flasks are of the piece may be obtained therefrom. pierced with holes f to facilitate moving or 20 This invention has for its object the proopening by an appropriate means, and the duction of an apparatus for the manufacture straight line joining the axes of these holes f of these pattern-plates which shall permit passes through the center of gravity of each impressions from a pattern without mistakes half of the flask. and with precision, which impressions shall The mode of employing these special 25 be perfectly symmetrical with respect to a flasks is as follows: At first a sand mold is geometrical axis, and also to make the patmade with or from the pattern by employing tern-plates of dimensions to correspond with both parts a and Z) of the special moldingthe molding-flasks in connection with which box disposed one above the other, their they are to be used, requiring only a small. right-hand sides being closed by plates 0 c,

30 number of special flasks for the purposes of as shown in Figure 1. In this molding the the invention; patterns are located in the most convenient In the accompanying drawings, Figure 1 manner without regard to the position of is a vertical section of a flask of which the the holes 6 e or (Z (Z. For instance, if these two parts are superposed. Figure 2 is a patterns are long pieces they should be 35 plan View corresponding with Figure 1. placed parallel to the longer axis of the box,

Figure 3 is a vertical section through both and if they are wide pieces they should be parts assembled side by side. Figure 4 is a located so as to avoid unnecessary loss of plan view corresponding with Figure 3. available space and, in fact, in the best pos- Figure 5 is a plan view representing the sible manner to include them. in the molding- 40 flask or molding-box, the object of the inboxes without regard to the pin-line being vent-ion, in combination with a patterneither parallel or perpendicular to the main frame. Figure 6 is a plan view showing a axis. This being done, part Z) lifted vermodified arrangement. tically from part a by suitable mechanical The special flask comprises two symmetdevices, as already alluded to, and the plates 45 rical parts a b exactly alike and capable of c 0 having been removed the parts a and Z) being accurately superposed, as shown in are placed side by side, as shown in Figures Figure 1. The two parts of this flask are 3 and 4:. The pattern being then removed each open on one side, and each of these from the sand, the pattern-plate is cast. openings can be closed by a plate, as c 0, It generally occurs that the castings in the 50 Figures 1 and 2. These two parts of the flask a 7) do not occupy the entire space in special flask are carefully matched in order this flask, and under these conditions it is that they may be mounted one upon the other not necessary to make the pattern-plate as or placed side by side with perfect accuracy, large as the flask, and for the molding of it as shown in Figures 3 and 4:, and each of the form of flask is chosen, according to the arrangement of the prints or impressions and so that it will contain these with sufficient space around them and so that the pattern-frame 1 may be conveniently placed upon the mold, Figures 5 and 6. This pattern-frame 1 is furnished with ears pierced with openings m. The pattern-frame 1 being placed upon the flask a b, spindles are introduced and perfectly adjusted in the openings 71v and d or e, and plaster or cement is oured into the flask and left until it is su ciently hard. Then on removing the spindles, which have been carefully placed in the openings m, Figures 5 and 6, before the material is set they leave in the mass two openings, which later serve in fixing the pattern-plate upon the molding-machine and also for locating the flask employed in the molding upon this plate, so as to insure perfect regularity of all the castings obtained by this process.

The openings in the pattern-frame 1 are separated by the same distance as the openings for thespindles of the ordinary moldingflask.

Figure 5 represents the position of a pattern-frame 1 for providing for prints smaller than the available surface of the special flask a b. Figure 6 represents the position of a pattern-frame 1 for a rectangular print of which the longest side is perpendicular to the line 00 y. In either of these two cases the pattern-frame 1 may be turned ninety degrees if it be desired to change the position of the longer axis of the pattern with respect to the joint plane of the flasks.

Instead of making the pattern-plate larger than the molding flask, as is the general practice, it is preferable to make it of the same dimensions as the flask.

The patternframe 1 serves, when the mold to be made is much smaller than the flask, to make a pattern which has only the necessary dimensions. Vith this pattern so made one may employ flasks having only the dimensions of the particular frame 1. Vithout the frame 1 or one having the same dimensions it would be necessary to employ flasks having the dimensions of the frames.

Having now fully described my invention, what I claim as new herein, and desire to secure by Letters Patent, is

1. In an apparatus for the manufacture of symmetrical pattern-plates, the combination of two similar halfflasks, removable plates for closing the sides of these flasks, the half-flasks being provided with half openings in the plane of junction and with openings in a plane perpendicular to the plane of junction, the parts being arranged to form a complete flask of which the sides are pierced with holes located at the corners of a square, and a pattern-frame having arms pierced with holes at the same distance from each other as those in the half-flasks, substantially as described and for the purpose specified.

2. In an apparatus for the manufacture of pattern plates, the combination of two similar half-flasks, removable plates for closing the sides of these flasks, a plurality of pattern frames of diiferent sizes, each of which is adapted to fit inside the flasks, and means whereby the pattern frame is positioned with its center-line over the line of joinder of the half-flasks when they are placed side by side.

3. In apparatus for the manufacture of pattern-plates, the combination of two similar half-flasks, removable plates for. closing the sides of these flasks, a pattern-frame adapted to fit inside the half flasks, and means whereby the pattern-frame is positioned with its counter-line over the line of joinder of the half flasks when they are placed side by side and holes through the pattern-frame in positions corresponding to those of the pins on the flask with which the pattern-plate is to be used.

4. In an apparatus for the manufacture of pattern-plates, the combination of two similar half-flasks each having a removable side plate whereby the half-flasks may be matched together to form a single flask when the two side plates are removed and a pattern-frame adapted to fit inside the assembled half-flasks and provided with means whereby it is centered on the half-flasks and havin other positioning means located on opposite sides of its center-line and inside the assembled half-flasks.

5. In an apparatus for the manufacture of pattern plates, the combination of two similar half-flasks which may be matched together to form a single flask, and a plurality of pattern frames of different sizes, each of which is adapted to fit inside the assembled half-flasks and each of which is provided with a pair of projecting arms having means engaging the flasks whereby the frame is centered thereover.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

PHILIBERT BONVILLAIN.

Witnesses:

DEAN B. MAsoN, JULIEN CANERUE.

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