US1227773A - Molding-machine. - Google Patents

Description

J. N. FRANTZL MOLDING MACHINE.

APPLICATION FILED AUG. 15. 1916.

LQWJ'ZS, Patented May 29, 1917.

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JEROME N. FRANTZ, 0F NEWARK, NEW JERSEY, ASSIGNOR TO THE FOUNDRY APPLI- ANGE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented May 29, 1917.

Application filed August 15, 1916. Serial No. 114,960.

To all whom it may concern:

Be it known that I, JEROME N. FRANTZ, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification. My invention relates to molding machines and particularly to arrangements therein, or attachments thereto, adapted to facilitate the separation of the parts of the flask and removal of the pattern from between the same. After the mold has been made in the sand within the flask, it is common, after the mold has been rammed up, to lift off the cope or upper half of flask by hand, then remove the' pattern plate and then lower the cope onto the drag. In this operation, however, great skill is required to prevent lifting the cope and pattern unevenly which is likely to injure the molded surface in the flask. Devices are also known in which mechanical strippers are used such as those which rise from below to lift the pattern from the drag. These are open to the objection, however, that inequalities in the surfaces raised, or wearing of the parts, may cause the pattern to move unevenly.

My invention is intended to overcome these difliculties and to provide a simple and effective means for'removing the pattern from the flask. In accordance with my invention, a supporting member is provided, having fingers or surfaces which are adapted to eX- tend beneath pins or lugs which extend from the side of the cope. This member is slidably mounted, or is so supported that the arms may be projected beneath the pins in the cope or removed from beneath the same. The member is provided with a handle and is pivotally mounted in such a manner that it may be manipulated to cause the arms, of which there are two on each side of the flask, to firmly engage the pins. The member now being held firmly by the handle, relative movement is caused between the cope, whlch is thus suspended, and the pattern and drag. After the pattern and drag have been sufficiently separated from the cope, similar fingers, or surfaces, which may be ad uStably mounted on the member referred to, are caused to engage in the same manner pins or lugs which extend from the sides of the pattern. Further relative movement between the flask-support and the squeezerplate at the top causes separation between the suspended pattern and the drag, whereupon the pattern may be removed laterally and the cope and drag caused to engage, inclosing the completed mold. Other objects of my invention reside in the combinations of parts and improved constructions which will be more fully set forth hereinafter.

In order that a clearer understanding of my invention may be had, attention is hereby directed to the accompanying drawings forming part of this application and illustrating certain embodiments of my invention. In the drawings Figure 1 represents a partial front elevation of a molding machine equipped with my invention, a twopart flask with interposed pattern plate being shown therein, Fig. 2 is a vertical section taken on line 2-2 of Fig. 1, Fig. 3 is a view similar to Fig. 2 showing the cope, pattern and drag separated and Fig. 1 is a horizontal section on line H of Fig. 3.

Referring to the drawings, the molding machine comprises a support'l carried by a piston 2 in an air cylinder 3. The flask is carried by support 1 and comprises the drag 4 and cope 5 with the interposed pattern plate 6.

The two cross beams 7 7 carry the pressingor squeezing-plate 8 which is adapted to enter the 'top of the cope when the support 1 is raised, or when relative movement is caused between plate 8 and support 1 to decrease the distance between the same, to ram the sand in the mold. Cross-bars 7 7 are carried at an adjustable height above the floor on the vertical arms 9 which may be pivoted below cylinder 3 to the frame of the machine so as to permit cross-bars 7 and plate 8 being swung out of the way. The construction described is common and therefore'is not illustrated fully.

The cope 5 is provided in the preferred form of my invention, with a pair of outwardly extending pins 10 on each of two opposite sides and the pattern 6 is similarly provided with a pair of outwardly extending pins 11, 11 on each of the corresponding opposite sides. A bracket 12 is mounted upon cross-rails 7 and carries a sheave 13 provided with a ratchet 1 1, a pawl 15 engaging therewith, and a handle 16. A cord 17 runs over the sheave and is connected at one end to a cross piece 18, the other end of the cord being secured to the sheave.

The cross piece 18 extends across and is secured, to the upper ends of a pair of cylindrical members 19 which are mounted for vertical reciprocation through bearings 20, 20 which are secured between the crossrails 7.

Each vertical member 19 is forked at its lower end, as shown at the right in Fig. 1, and a bar 21 is pivotally mounted in each fork. Each bar 21 has a longitudinal slot 22 therein through which extends the pin 23 which is mounted in the two arms of the fork at the lower end of member 19. The two parallel bars 21 are each provided with a pair of downwardly extending portions 24 from which extend arms 25. Arms 25 extend toward the front of the machine and are preferably inclined on their upper edges at slight upward and rearward angle, as is shown.

The vertical portions 241 are provided with a plurality of bolt openings 26 through any one of which a bolt may be extended to secure a bracket 27 to each arm 24, brackets27v having laterally extending arms 28 parallel and similar to arms 25. A crossbar 29' connects the front ends of members 21 and is provided with a curved handle portion 30 in front. Preferably, cross bar 29 is so secured to members 21 as to give bar 29v a certain amount of play, as by mounting bar 29 on screws 31 extending outwardly from the front ends of members I 21, bar 29 having play between the ends of shown in Figs. 1 and 2.

members 21 and the spaced heads or nuts 32 on bolts 31.

The operation of the device described will be readily apparent. When the flask has been filled with sand and the latter molded about the pattern 33 on patternplate 6, by raising plunger 2 while pressing-plate 8 presses against the upper surface of the sand in the cope, the pattern separating member will be in the position As there shown, fingers or arms. 25 are to the rear of pins 10 on the cope and slightly below the same, while arms 28 are to the rear of pins 11 on the patternplate and a further distance below the same. Brackets 27 carrying arms 28 are, of'course, secured to arms 2 1 at a desired distance below arms 25 in accordance with the height of the cope and pat tern plate. Also, cord 17 has been so adjusted around sheave 13 as to bring the upper surfaces of arms 25 substantially in alinement with the bottom surfaces of pins 10. The frame 21, 24 is now drawn forward, by handle 30 until the upper surfaces of arms 25 firmly engage the bottom surfaces of pins 10, this being permitted by the pin and slot connection between arms 21 and vertical: members 19. The upper surfaces of arms 25 are preferably inclined, as stated, to facilitate this adjustment in case there are inequalities. in the, flask members operated upon and in case ofunequal spacing of the pins 10 in different copes. Also, the bars 21 may be tilted somewhat about pins 23 to permit the firm engagement of all four pins 10 with the corresponding arms25.

The handle 30 is now held firmly in position, while air is released from cylinder 3 to permit support 1 with the drag and pattern thereon to be gently lowered, the cope being held suspended on arms 25. After a sufficient lowering to disengage the pattern from the cope, pins 11 come to rest upon arms 28, the frame 30, 21 being manipulated slightly if required to cause the four pins 11 to seat evenly on arms 28. V The support 1 is again lowered to its bottom position leaving the pattern plate 6 suspended at a point intermediate the cope and drag, as is shown in Fig. 3, whereupon the pattern may be removed by a lateral motion. The cope may-now be lowered upon the drag by releasing pawl 15 from ratchet 1,4, while the operator holds handle 16, and; permits the same slowly to revolve.

In the preferred form of my invention I also provide means whereby the drag may be drawn forwardly upon the support 1 of the piston 2 for the purpose of inspecting the mold therein, and accurately replaced beneath the cope and pattern. For this purpose, I- secure guides 3% on the support 1 having undercut or dove-tail guiding surfaces in which slides 35, 35. are mounted. Slides extend, upwardly a slight distance above guides 34 and have a horizontal plate 36 integral therewith or secured thereto upon which plate the drag 41 may be mounted. Slides 35 also have upwardly-turned extensions 37, 37 at the rear which are adapted to be located to therear of the rear surface of the flask. A horizontal strap portion, 38 extends laterally from one of the rear extensions 37 and then, bends forwardly at right angles, as is shown at 39. Rear extensions 37 and the side extension 39 may be provided with. inwardly directed setscrews 40 or the liketo form accurate stops against which the drag may be adjusted. The slides 35. may be provided with. bent portions 11 at their extreme rear ends to act as stops to prevent slides 35 being drawn side surface of the drag engaged with the side stop pin 40, and it is desired to inspect the molding in the drag, slides 35 and plate 36 with the drag thereon may be drawn forwardly to overhang the support 1 a considerable amount, since the dove-tail engagement of slides 35 in their guides 34 will prevent overturning of the same. The drag may now be accurately replaced in its former position by pushing the slides 35 back until front portions 4-2 thereof engage pins 43.

It should be understood that my invention is not limited to the exact form of construction 'which has been particularly described, but that it is as broad as is indicated by the accompanying claims. It is obvious that the provision of a horizontal axis about which members 21 may be tilted enables arms 25 and 28 to be brought accurately into engagement with the pins on the cope and the pattern plate regardless of inequalities or inaccuracies in the spacing of the pins, and that the provision of tapered upper surfaces on arms 25 also aids in brin ing the arms into firm engagement with the pins of different flasks, once the height of the bars 21 has been approximately determined upon starting operations with flasks of approximate uniformity. The action of my improved devices does not depend upon the use of a particular type of molding machine, but may be used with .various machines in which relatve movement may be obtained between the suspended frame 21 and the support 1, either by raising and lowering the support 1 or otherwise. It should also be observed that while I have described inclined surfaces on frame 21 engaging pins on the cope and pattern, equivalent structure may be employed with like effect.

Vhat I claim is:

1. In a molding machine the combination of a vertically movable support, adapted to receive a flask having a cope and drag with a pattern between the same, means for raising and lowering the support, a frame, a pressing plate carried thereby above the position occupied by the cope, adapted to press against the sand in the top of the cope when the support is raised, and a member mounted on said frame having supporting projections adapted to engage under lugs on the cope, and projections positioned to engage under lugs on the pattern when the latter and the drag are lowered partway beneath the suspended cope, said member being mounted to permit lateral movement thereof, to position said projections beneath the lugs and to remove them from beneath the same, substantially as set forth.

2. In a molding machine the combination of a support, a flask having a cope and drag with a pattern between the same adapted to be supported on said support, said cope and pattern having laterally-extending lugs thereon, a frame, a pressing plate carried thereby above the cope, means for causing relative movement between said support and plate, to increase and decrease the distance between the same, and a member mounted relatively to said plate, having supporting projections adapted to engage under lugs on the cope, and projections positioned to engage under lugs on the pattern after separating movement between said support and plate has separated the suspended cope from the pattern and drag, said member being supported to permit lateral movement thereof, to position said projections beneath the lugs and to remove them from beneath the same, substantially as set forth.

3. In a molding machine the combination of a frame, a vertical support thereon, a pair of horizontally extending members suspended from said support by pin and slot connections, adapted to permit lengthwise movement of said members and pivotal movement thereof, a support adapted to receive a flask having a cope and drag with pattern between the same, said members positioned to extend on opposite sides of the flask, and vertical extensions on said members having portions adapted to extend under lugs on the cope, and also on the pattern, said members being lengthwise movable sufliciently to remove said portions from under said lugs, substantially as set forth.

4. In a molding machine the combination of a frame, a vertical support thereon, a pair of horizontally extending members suspended from said support by pin and slot connections, adapted to permit lengthwise movement of said members and pivotal movement thereof, a support adapted to receive a fiask having a cope and drag with pattern between the same, said members positioned to extend on opposite sides of the flask, vertical extensions on said members having arms adapted to extend under a pair of lugs on each side of the cope, brackets adapted to be secured to said extensions having arms adapted to extend under a pair of lugs on each side of the pattern, and means for securing said brackets in desired adjusted positions on said extensions, said members being movable lengthwise sufliciently to remove all said arms from under said lugs, substantially as set forth.

5. In a molding machine having a support, adapted to support a flask having a cope and drag with a pattern between the same, the combination of a cross member positioned to extendabove the flask, a sheave thereon, a flexible connection about the sheave, and extending downwardly therefrom, a frame comprising a pair of horizon tally extending members positioned to extend, one on each side the flask, suspended from said connection, said frame having a handle in front and vertically spaced por tions adapted to extend under lugs on the cope and pattern, substantially as set forth.

6. In a molding machine having a support, adapted to support a flask having a cope and drag with a pattern between the same, the combination of a cross member positioned to extend above the flask, a Vertically movable frame suspended from the cross member, a pair of horizontally extending members positioned to extend, one on each side the flask, secured to said frame by pin and slot connections, and forwardly extending arms on said members, adapted to extend under a pair of pins on each side of the cope and the pattern, said arms having inclined upper surfaces, substantially as set forth.

7 In a molding machine, the combination of a support, a flask having a cope and drag with a pattern between the same, adapted to be supported on said support, said cope and pattern having laterally extending pins thereon, a cross member above the flask, a frame comprising a pair of horizontally extending members, one on each side the flask, suspended from the cross member by a connection permitting tilting of the frame about a horizontal axis, arms on the frame adaptedto extend under a pair of said pins on each side the cope, and other arms on the frame positioned to extend under a pair of said pins on each side the pattern, the vertical distance between the two sets of arms being greater than that between the pins on the cope and pattern, substantially asset forth.

8. In a molding machine, the combination of a Vertically rec'iprocable support, guides thereon, a plate adapted to receive a flask, having portions slidably mounted in said guides, upwardly-turned rear extensions on said portions, and a horizontal strap portion extending laterally from one of said rear extensions and then forwardly at right angles, said rear extensions and strap portions being adapted, to be engaged by the rear and side of a flask on said plate, when the flask is moved against the same, substantially as set forth.

This specification signed and witnessed this 9th day of August, 1916.

JEROME N. FRANTZ.

Witnesses:

DYER SMITH, WILLIAM I-IIMMELREIOH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

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