US880929A - Mold-stripping machine. - Google Patents

Description

No.-880,929. PATENTED MAR. 3, 1908.

- E. P. SLENTZ.

MOLD STRIPPING MACHINE.

APPLICATION FILED AUG 31 1905 EDMUND P. SLENTZ, OF OAK, PENNSYLVANIA.

MOLD-STRIPPING MACHINE.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed August 31, 1905. Serial No. 276,590.

To all whom it may concern:

Be it known that I, EDMUND P. SLENTZ, a citizen of the United States of America, residing at Oak, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Mold-Stripping Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in stripping machines for molds.

The invention belongs especially to a particular type of construction employed for forming metalmolds in which the molding operation is performed above a suitable stripping frame.

Towards the furtherance of the efficiency of the above operation, my invention possesses novel advantages and functions not resident in theprior art and which may be briefly enumerated as follows: first, the advantage of the adjustability of the pattern supporting plate in any position to compensate for the varying sizes of pattern plate; second, the advantage of the adjustability of the frame work to adapt itself to varying sizes of pattern supporting plate, and third, the advantage of effecting a very fine, minute adjustment or movement in a horizontal plane of the pattern supporting plate after the latter has been set and locked in its set position by an adjustable and movable support.

The above and various other novel ad vantages and functions will appear in the course of the following detailed description, reference being had therein to the accompanying drawings, forming a part of this specification, like numerals designating like parts throughout the several views, in which Figure 1, is a side elevation, the side plate being broken away to show the pattern supporting plate, pattern plate and pattern and mechanism connected thereto. Fig. 2, is an end elevation thereof. Fig. 3, is a top plan View, Fig. 4, is a vertical central section of a corner post which is employed at each corner, and Fig. 5 is a detailplan view of a pivoted adjustable supporting leg for effecting a minute adjusting movement in avertical direction of the pattern supporting plate, after the latter has been seated in an approximately correct position. Fig. 6 is a plan view of a block, and shoe movable in connection with the leg shown in Fig. 5. Fig. 7 is a detached plan view of a frame employed in connection with the leg shown in Fig. 5. Fig. 8 is a vertical sectional view of the leg, the block and the shoe shown in Figs. 5, 6 and 7.

My improved mold stripping machine comprises an open frame A mounted upon i a stationary pedestal B supported upon a suitable bed. The frame A comprises a rectangular base frame 1 upon which are mounted at the corners thereof, corner posts 2. To the upper ends of the posts 2, a rectangular top or stripping frame 3, similar in construction to the frame 1 is rigidly secured. While I have shown and described the frames 1 and 3 as rectangular and the corner posts 2 as four in number, this is but an arbitrary configuration and arrangement and in no wise necessary to the successful operation of the machine as the shape of the base and top frames as well as the number of corner posts, may be correspondingly changed to accommodate varying contours of pattern and molds.

An I-shaped metallic plate 4 is rigidly fastened in any desired manner upon the underneath surface of the base frame 1, and the cross bar 5 of said plate 4 rests upon and is secured to the top of the pedestal B. Said plate 4 carries upon the sides thereof depending bearings 5 which are secured in any desired manner. There are four bearings 5 two of which are arranged on each side of the frame A, this arrangement serving to provide two oppositely disposed pairs of axially alined bearings. In each pair of bearings 5 is rotatably mounted a transverse shaft 6 having its ends projecting through said bearings. These shafts 6 are disposed in spaced parallel relation and are in connection with elements operative upon the rotation of said shafts for raising and lowering the mold bed. Mounted upon each side of the frame A, and having rigid connection with the adjacent projecting ends of the shaft 6, are members 7. Each member 7 forms one element of the toggle link connection of the pattern supporting plate hereinafter described. Each member 7 has formed adjacent its base an integral pinion sector 8, and the adjacent sectors 8 on each side of the frame A, are at all times in intermeshing relation to one another. The toggle connection above mentioned is employed in conjunction with the pattern supporting plate and serves upon the rotation of the shaft 6, in the proper direction, to raise and lower said pattern supporting plate with relation to the top frame 3. The other ele ments of the toggle connection embody a by any direct pressure thereupon, in the direction of the vertical plane of the links when in the position just described. Each link 9 has pivotal connection at its upper end as at 12, with the sides of a rectangular frame 13, which serves as a pattern supporting plate. The frame 13 is provided adjacent the corners thereof, with angular recesses or cut out portions 14, which fit over the inwardly projecting corner posts of the frame A, said corner posts fitting in the recesses 14 to serve as guides. These corner posts which have had the general designation 2, are of peculiar construction and embody two members 15 and 16; the member 15 is, more properly speaking, a corner post of the frame A, since it has a positive connection between the top and bottom frames thereof.

The member 16 is formed with an angular corner which fits into the cutout portions 14 of said frame 13, and is adjustably connected with the member 15 by upper and lower threaded bolts 17, which pass loosely through said member 15 and are threaded into the member 16. By turning these bolts in the proper direction, the member 16 of the corner posts 2 can be moved outwardly or inwardly to proper position with relation to the size of the pattern supporting plate for which they constitute guides. For the purpose of locking said member 16 in its predetermined position, after it has been set therein by the bolts 17, I have provided a second series of upper and lower bolts 18, which are threaded into the member 15 and bear against the confronting surface or edge of the member 16 and prevent any movement thereof due to vibration of the machine or the play of said bolts 17;

In effecting a finer adjustment of the vertical position of the pattern supporting plate 13 with relation to the top or stripping frame 3, 'I embody in each of the links 7, a peculiar adjusting device construction as follows: The link 7 is provided with a longi tudinal slot 19, having the general configuration of a parallelogram. In this slot 19 a block 20 is slidably mounted by virtue of a shoe 21 which follows the line of configuration of the slot 19, but is of less length than said slot so as to permit of limited movement therein, in either direction; The movement of the shoe 21, and block 20 carried thereby, is efiected through the agency of a laterally sliding rectangular frame 22, which moves along a recessed transverse guide way 23, shown in Fig. 8 and cut in the link 7, adjacent said slot 19. The frame 22 is formed with inclined edges 24, upon the upper and lower cross bars 25 thereof. distance between the inclined edges 24 is equal to the length of the shoe 21, which fitsinto the frame 22 and has its inclined edges bearing against the confronting inclined edges 24 of said frame 22. For the purpose of moving the frame 22 in the recessed guide way 23, I have provided at each side thereof, adjusting bolts 26, which bear against the sides of the shoe 21, in moving said frame 22 transversely thereto. It is clearly obvious that as the frame 22 is moved transversely, the shoe 21 will ride either in one or the other direction upon the inclined edges 24 of said frame and that this will cause the block 7 to move in a correspond ing direction lengthwise of the link 7. The link 9 has connection with the block 20, adjacent said shoe 21, the fulcrum point thereof being indicated by the opening 27, which extends through said block 20, and. into said shoe 21.-

The parts constructed and arranged as above described are secured together and pivotally attached to the link 9 by means of a bolt 27 as clearly shown in Fig. 8 of the drawing.

In order to limit the downward movement of the pattern supporting plate 13 with relation to the thickness of the pattern supported thereon, a vertical post 28 is employed which is held between the top and bottom frames 3 and 1 of the frame A. Adjustably mounted to slide upon said post 28, is a shelf 29., which is tightened or loosened thereupon by a bolt 30 passing throu h bifurcations 31 in said shelf 29, said hi urcations straddling said post 28. The structure thus described is protected from sand and dirt by depending supplemental walls 32 preferably of sheet metal, which inclose the mechanism on each side of the frame A. The walls 32 are secured to the frame A, adjacent the top frame 3 thereof, by any desirable form of fastening as at 33.

In operation the pattern plate A, which for different patterns varies in thickness, is mounted upon the pattern supporting plate 13 within the frame A. The pattern plate A is then secured to the pattern supporting plate 13, a pattern A being carried by the pattern plate A. The height of the pattern and the thickness of the pattern plate having been measured, one of the shafts 6 is rotated by a crank 34 fitting over the square head 35 of said shaft, thereby im- The parting motion to the links 7 mounted so thereupon The links 7 which receive positive movement from the rotation of the shaft will by virtue of the intermeshing sectors 8, transmit similar motion, but in the opposite direction to the opposite links 7 mounted upon the opposing shaft 6. This upward movement of the links 7 will tend to bring said links together, and carry upwardly therewith the pattern supporting plate 13. When said pattern supporting plate 13 is in such a position that the top of the pattern is above the stripping frame 3, the shelf 29 is set upon the post 28 by tight ening the frictional grip of the bifurcated ends 31 thereof, upon said post 28. The frame 13 is then supported from gravitating downward movement upon said shelf 29.

When the molding operation has been per formed, and it is desired to strip the pattern from the mold, the shelf 29 is moved down wardly upon post 28, thereby allowing the frame 13, due to the weight upon the same, to drop by gravity, at which time the pattern will be stripped by the top frame 3 and the frame A, the mold designated B being shown upon the top of the frame 3 in Figs. 1 and 2 of the drawing. Should it be necessary to effect a very fine adjustment of the height of the frame 13, with relation to the stripping frame 3, the adjusting device upon the toggle link 7 is employed. In this case, the adjusting screws 26 are rotated so that the frame 22, in which said screws are threaded, will have movement in the recessed passage way 23 formed in said link 7. The shoe 21 will ride in the proper direction upon the inclined edges 24 of said frame and thereby impart its movement to the link 9 pivoted thereto at 27. Should the thickness of the pattern plate A be such that theframe 13 can be raised to the limit of its vertical movement, by the engagement of the offset stops 11 with the straight edges of the link 9, a dead center will exist at the fulcrum 10, which it is impossible for any weight to overcome. In this case, the frame 13 is moved downwardly by turning the shaft 6 in the proper direction.

as to draw together the toggle links 7 and 9. If, however, as may be the case where a very thick pattern plate is employed, the frame 13 l cannot be raised to such height that a dead center will be established between the links 7 and 9, the supporting shelf 29 is moved upwardly on the post 28 in the manner hereinbefore described so as to sustain the pattern supporting plate against pressure from above.

hen it is desired to regulate the position of the corner guide post so as to adapt itself to the variations in size of the pattern plates employed, the adjustment is effected by moving the member 16 of the corner post 2, and locking the same by screws 18 as above described.

It is obvious that yarious other minor changes may be made without departing from the scope of my invention as defined in the appended claims, such for instance, as changes in the adjustment of the corner posts, in the adjustment of the shelf, in the shelf itself, and the adjustment of the toggle connections, together with variations in the shape of the frame.

Having fully described my claim In a device of the class described, a standl ard having a rectangular upper portion and I spaced transverse bearings, an open rectangular frame having spaced vertical sides constituting guide members engaging the rectangular upper portion of said standard, a stripping frame mounted upon said rectangular frame, apattern supporting plate associated with said stripping frame, shafts mounted for oscillation in the bearings of said standard, gear segments carried by said shafts and having radially-extending arms, and links between said arms and said pattern supporting plate.

In testimony whereof I affix my signature in the presence of two witnesses:

EDMUND P. SLENTZ.

invention, I

Witnesses:

JOHN S. Pownns, CHAs. OGLESBY.

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