US726426A - Molding-machine. - Google Patents

Description

No. 726,426. YPATENTED APR. 28, 1903.

F. W. HASTINGS.

MOLDING MACHINE.

APPLICATION FILED JUNE 22, 1901. RENEWED DEC. 3. 1902. no MODEL. 5 SHEETS-SHEET 1.

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N5. 726,426. PATENTED APR. 28, 1903. P. w. HASTINGS.

MOLDING MACHINE.

APPLICATION FILED JUNE 22, 1901. RENEWED DEC. 3, 1902- 6 SHEETS-SHEET 2.

N0 MODEL.

PATENTED APR. 28, 1903.

F. W-4 HASTINGS.

- MOLDING MACHINE.

APPLIGATION FILED JUNE 22, 1901. RENEWED m0. 3. 1902.

'6 SHEETS-SHEET 3.

N0 MODEL.

No. 726,426. P-ATENTED APR. 28, 1908.

F. W. HASTINGS.

MOLDING MACHINE.

APPLICATION FILED JUNE 22, 1901. RENEWED DEC. 3. 1902.

NO MODEL. 5 SHEETS-SHEET 4.

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No. 726,426. PATENTED APR. 28, 1903.

P. W. HASTINGS.

MOLDING MACHINE.

APPLICATION FILED JUNE 22, 1901. RENEWED DEC. 3. 1902.

N MODEL.

SHEETSP'SHEET 5.

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FRED W. HASTINGS, OF BELVIDERE, ILLINOIS, ASSIGNOR TO NATIONAL SEWING MACHINE COMPANY, OF BELVIDERE, ILLINOIS, A CORPORA- TION or ILLINOIS.

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SFEOIFIGATIQN forming part of Letters Patent No. 726,426, dated April 28, 1903.

Application filed June 22, 1901. Renewed December 3, 1902. Serial No. 133,779- (N0 model.)

To (LZZ whom it may concern.-

Be it known that I, FRED W. HASTINGS, a citizen of the United States, residing at Belvidere, in the county of Boone and State of Illinois, have invented certain new and useful Improvements in Molding-Machines, of which the following is a full, clear, and exact specification.

Myinvention relates to molding-machines or machines for making molds; and it has for its primary object to roll the sand and thus compress it after it is placed in the flask.

Another object of my invention is to so form the flask that the pressure against the top of the sand will cause the sand to peen laterally toward and around the pattern.

Another object of the invention is to so construct the flask-hinges that the same shall possess a tendency to drift the upper flask toward its proper position with relation to the bottom one and at the same time will be so formed as to avoid the accumulation of sand and dirt, which prevents the proper registering of the flasks.

A still further object of my invention is to provide means for separating the flasks in a perpendicular direction with reference to their faces, whereby the features of the pattern which project into the sand of the upper flask will draw properly and not damage the impression.

With these ends in view my invention consists in certain features of novelty in the construction, combination, and arrangement of parts by which the said objects and certain other objects hereinafter appearing are attained, all as fully described with reference to the accompanying drawings and more particularly pointed out. in the claims.

In the said drawings, Figure 1 is a vertical machine, partly in section and partly in elevation, showing the parts as in Fig. 1, but illustrating the roller making its return movement after rolling the-sand as in Fig. l and one of the scrapers leveling the sand even with the top or edges of the flask. Fig. 5is a vertical longitudinal sectional view of the table and two flasks, showing the complete mold with the pattern between the mold members. Fig. 6 is an enlarged detail perspective view of one of the hinge members of the flasks. Fig. 7 is a plan view illustrating the concave or hook-shaped hinge member on one side and on the other side the two hinge members placed together. Fig. 8 is an end view looking toward the right as in Fig. 5. Fig. 9 is a view similar to Fig. 5, showing the upper flask lifted perpendicularly away from the lower flask. Fig. 10 is a similar view of one end of the device, showing the upper flask in the act of being turned back preparatory to removing the pattern; and Fig. 11 is asimilar view showing the manner of allowing the upper-flask hinge members to again settle back into their hooks or companion members while the upper flask is being turnedupwardly from the position shown in Fig. 9 to the position shown in Fig. 11.

1 is a bench or pedestal, which may be of any suitable construction, for supporting a table 2 in any manner that will permit the table to yield under pressure, preferably independently at opposite ends. In the example of the invention shown in the drawings the bench 1 is provided on its upper side with a number of cushions or springs 3, 'whose lower ends are held in place by suitable bosses 4., formed on or secured to the bench, and their upper ends by similar bosses 5, provided on or secured to the under side-of the table 2. The table 2 being thus supported at a distance from the bench 1 by independent springs or cushions, it will be seen that it is adapted for yielding bodily and also teetering on an independent axis. In order, however, that the table 2 may be held against longitudinal vibration, the ends of the bench are provided with vertical guides 6, which project upwardly above the lower edge of the table and permit the table to rise and fall and also teeter, while holding it against un due lateral vibration. The edges of the table, if desired, may be provided with a depending flange 7, engaging between the guides 6 and slightly curved to permit of an easy movement of the table on its independent axis, if necessary. The table may be held against lateral oscillation transversely by similar guides 8, secured to the sides of the bench 1 and projecting upwardly beyond the edge of the table or its depending flange '7. This cushioned table 2 is designed for the support of the match-plate, which is shown at 9, and the flasks placed thereover in the usual or any suitable manner, and in the use of the apparatus the match-plate!) is first laid upon the table, as better shown in Fig. 1, with its imprint turned upwardly in the usual manner, and one of the flasks 10 is then placed upon the match-plate, the pattern 11 having been previously laid in its proper place in the match-plate, and the flask is then filled with sand, which is compressed to the desired degree of density around the pattern by means of a roller 12, supported and guided across the flask in any suitable manner by hand or by power. In the example of the invention shown in the drawings this roller is provided with an axle 13, rigidly secured by set-screw or other suitable device 14 in'two hangersl5, each having bifurcations l6, suspended from trolley-wheels 17, running on overhead rails 18, extending longitudinally of the flasks and parallel with their surfaces, so that as the roller is moved back and forth it will compress the sand in the flask with a uniform density from end to end. The end of the axle 13 may be provided with a handle or grip 19, whereby the roller may be moved back and forth.

In order that the sand may be level in the flask preparatory to passing the roller over it, so that the compression will be uniform throughout the surface of the flask and may also be regulated, the carriage of the roller or some part moving with the roller is provided with a scraper 20, which precedes the roller in its movement across the flask in the manner better shown in Fig. 1, and thus not only levels the sand, but reduces it to a depth or thickness which when compressed to the level of the lower side of the roller will not be too great. This scraper is mounted upon arms 21, which are journaled or pivoted on the axle 13, as better shown in Fig. 3, and held adjustably thereon by means of set-screws 22, so that the depth of the sand may be varied preparatory to the rolling operation.

In the use of the machine the roller 12 should be so positioned with reference to the height of the table 2 and the springs 3 so proportioned in strength and length that the rolling operation will leave a considerable depth of sand above the edge *of the flask, thus avoiding the possibility of the roller coming in contact with the edges of the flask,

where its compressing action would cease, and in order that this depth of sand left above the edge of the flask may be automatically removed or shaved ofl even with the edge of the flask after the rolling operation has been completed the opposite side of the roller-carriage is provided with a scraper 23, which is pivoted at 24 to thelower ends of arms 25, rigidly secured to the axle 13 by means of set-screw 26 or any other suitable device that will hold the arms rigidly while permitting of their adjustment or pivotal movement on the axle 13, if desired. The scraper 23 being loosely pivoted to the arms 25, it will be seen that when the roller travels in one directionthat is to say, in its compressing or rolling movement, as shown in Fig. 1the lower edge of the scraper, which is more or less rounded, will be deflected upwardly by the surface of the compressed sand; but when the roller makes its return movement, if such movement be required, the lower edge of the scraper will automatically dig into the sand and turn downwardly until its edge engages the upper edge of the flask, whereby it will shave the sand off even with the flask, it being understood that the roller is moved first toward the left, as shown in Fig. 1, a sufflcient distance to bring the edge of the scraper 23 at the left-hand edge of the flask and is then moved toward the right until scraper 20 entirely clears the flask and said scraper and the rest of the mechanism carried by the roller-carriage is out of the way of the operator. The downward movement of scraper 23 on its pivot 24 may be limited by shoulder 27 on the end of each of the arms 25.

The operation just described completes one of the mold members, which for the sake of convenience may be termed the drag. After this has been done a bottom board is laid over the flask 10 in the usual manner and said flask, together with the match-plate 9, is inverted on the table 2, the bottom board remaining 11nderneatl1,where the match-plate 9 is now situated, in the usual manner. (Not necessary to illustrate.) The match-plate 9 is then removed from the pattern 11, leaving the pattern in place in the drag. The upper flask or cope, which is shown at 28 in Fig. 5, is then fitted accurately over the lower flask 10 and filled with sand in any suitable way, after which the roller-carriage is passed over it toward the left, the springs 3 yielding under the extra weight and bringing the level of the upper flask down to approximately the same level as that originally occupied by the lower flask during the operation illustrated in Fig. 1, so that the advance scraper 20 will level the sand of the upper flask 28 in the same manner that it levels the sand of the lower flask, as shown in Fig. 1, and the roller 12 will compress the sand in the upper flask as it compressed the sand in the lower flask, and after the compressing operation or movement has been completed the movement of the roller toward the right will cause the scraper 23 to shave off the sand even with the top of the upper flask in the way it did in operating on the lower flask, as shown in Fig. at. The two mold members will then be finished, as shown in Fig. 5, and the flasks will be ready for separation in order that the pattern may be removed. Flasks of this character are ordinarily hinged together at one end so that the upper one may be turned back on its hinges awayfrom the lower one; but this operation or method of separating the flasks to remove the pattern is not feasible where the pattern hasfeatures, such as the features l1, projecting upwardly a considerable distance into the sand of the upper mold member, because this swinging of the mold member on an arc would cause said projecting features of the pattern to tear or damage the mold. According to this invention, therefore, the upper flask is raised perpendicularly with reference to the plane or face of the lower flask in order to clear the projecting features 11 of the pattern, and it is then turned back on its hinges, so that when replaced it will accurately match the lower mold member. Many forms of mechanism for accomplishing this might be resorted to. In the accompanying drawings 1 have shown each end of the bench 1 provided with a vertically-movable lifter comprising a cross-bar 29, secured at opposite ends to vertical guide-bars 30,which run in guides or keepers 31, secured to the bench 1 and guides 6, respectively, and the lower ends of these guide-bars 30 are connected together by a crossbar 32, with which engages the slotted end 33 of a lifter 34, pivoted at 35 to the bottom of bench 1.' These two lifters 34E project toward each other, as shown in Fig. l, and have their contiguous ends flexibly connected to a rod 36, which is pivoted to a treadle 37, whereby the operator may raise both of the lifter-bars 29 by one and the same operation simultaneously. As better shown in Fig. 9, each end of the upper flask or cope 28 is provided with a pair of lateral projections 33 38, the latter of which extends outwardly beyond hooks 39, constituting the hinge members of the lower flask, and said projections are so arranged as to be impinged by the lifter-bars 29 when the latter are raised in the manner shown in Fig. 9, thereby lifting the upper flask and mold member clear of the projections 11 of the pattern. The projections 38 are provided with hinge members, which seat in the hooks 39, as better shown in Figs. 6 and 7, and these hinge members on the upper flask consist of trunnions 40, formed on or secured to the sides of the projections 38 and comprising a coneshaped portion and a smaller or reduced cylindrical portion 41, which fit in complementary surfaces 42 43 (see Fig. 7) in the hooks 39. The trunnions being on the outer sides of the projections 38 and their smaller ends being turned outwardly, it will therefore be seen that the upper flask will possess a tendency to settle toward a central position, and at the same time the hooks 39 are so formed that they do not catch the sand and prevent accurate registering of the flasks. Then the upper flask is raised in the manner shown in Fig. 9, the larger part of the trunnions 40 a1 comes against or is in close proximity to the lifter-bars 29, and hence if at this time the upper flask be turned upwardly on an arc in the manner shown in Fig. 10 it will be held against slipping downwardly end wise by the lifter-bars, and if the lifter-bars are lowered while the upper flask is being thus turned it will be seen that the trunnions of the hinge members will again settle back into their seats in the hooks 39, as shown in Fig. 11, and consequently the upper flask may be turned on end, as shown in Fig. 11, and held or supported in that position by the hand of the operator or by any other suitable way without danger of getting the flask out of accurate registration when it is replaced after the pattern has been removed. The end of the flasks opposite the hinges may, if desired, be provided with the usual dowel 42 and dowel-socket 43. The edges of the flasks are formed on an incline or flaring. the smaller diameter being at the bottom or, more accurately speaking, at the contiguous edges of the flasks when they are together, so that when the sand is being rolled in the flasks the inclined edges will possess a tendency to crowd the sand laterally or inwardly at the bottom, and consequently peen it around the pattern and give it the desired density adjacent to the pattern without the necessity for the employment of special peening implements.

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

1. In a molding-machine, the combination of a yieldingly-supported flask, a pressureroller, and means for guiding said roller IIO across said flask for compressing the sand therein, substantially as set forth.

2. In a molding-machine, the combination of a cushioned flask-table for supporting a flask, a pressure-roller, and means for guiding said roller across said table for compressing the sand in said flask, substantially as set forth.

3. In a moldingmachine, the combination of a cushioned teetering flask table or support, a pressure-roller, and means for guiding said roller across said table or support, for compressing the sand, substantially as set forth.

4. In a molding-machine, the combination of a cushioned teetering and vertically-guided flask table or support, a pressure-roller, and means for guiding said roller across said table or support for compressing the sand; substantially as set forth.

5. In a molding-machine, the combination of a flask, a pressure-roller, means for guiding said roller across said flask, and a scraper at each side of said roller preceding the latter across the flask for leveling the sand therein, said scrapers being adapted to scrape in different planes, substantially as set forth.

6. In a molding-machine, the combination of a flask, a pressure-roller, means for guiding said roller across the flask, and a scraper pivoted on a horizontal axis and adapted to drag across and be deflected upwardly by the sand when moving in one direction, but to engage and scrape the sand when moving in the opposite direction, substantially described.

7. In a molding-machine, the combination of a bench or support, a' flask-table arranged over said support, springs interposed be- FRED W. HASTINGS.

Witnesses:

A. W. HOPKINS, -WILLIS S. BROWN.

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