US1750217A

US1750217A - elwell

Info

Publication number: US1750217A
Authority: US
Publication date: 1930-03-11
Anticipated expiration: 1947-03-11

Description

4 Sheets-Sheet l B. L. ELWELL MOLDING APPARATUS Filed April 2,' 1929 March 11, 1930.

March 1l, 1930. B. L. ELWELL. 1,750,217

MOLDING APPARATUS Filed April 2, 1929 4 sheets-sheet 2 BIL;

March l1, 1930. a. l.. ELWl-:LL

MOLDING APPARATUS Filed April 2, 1929 4 Sheets-Sheet 3 jl/,Elwell March 1l, 1930. B. l.. ELWELL MOLDING lAPPARATUS Filed April 2, 1929. 4 Sheets-Sheet 4 Patented Mar. l1, 193@ UNITED STTESV BBADEN L. ELWELL, F GRANITE CITY, ELLNOIS MOLDING- APPARATUS Application filed April 2, 1929. Serial lo. 351,957.

This invention relates to molding apparatus and more particularly to apparatus for forming sand molds, cores or the like.

An important object of the invention is to provide an apparatus for molding or packing sand flasks, core boxes or the like which may be mounted upon a shiftable carriage mounted for movement in one gen-eral direction and being mounted for movement transversely of the general line of movement of the carriage so that it may be successfully positioned over a number of diEe-rent flasks to pack sand therein, or over a number of different parts of the same flask.

A further object of the invention is to produce an apparatus of this character, a construction such that the main sand supply may be made relatively stationary upon the carriage and may therefore be disposed at all times where it is readily accessible for filling.

A further and important object of the invention is to provide a novel and improved means for forming the actual packing operation, which is so constructed that it may be vertically shifted to enable the same to be entered and withdrawn from a flask or moved as the filling of the flask progresses.

A still further object of the invention is 3o to provide a novel and improved packing apparatus wherein the packing is carried on in a manner as closely resembling as possible the packing operation as performed by human hands, and the sand is fed to the packing tool in such manner that it may not clog in its passage to this tool.

These and other objects I attain by the construction shown in the accompanying drawings wherein for the purpose of illustration I have shown a preferred embodiment of my invention and wherein Figure 1 is a vertical sectional view through molding apparatus constructed in accordance with my invention;

Figure 2 is a front elevation thereof, portions being broken away;

Figure 3 is a section on line 3-3 of Figure 2;

Figure 4 is a section on line 4 4 of Figure 3;

Figure 5 is a section on line 5 5 of Figure 1;

Figure 6 is a section on line 66 of Figure 3;

Figure 7 is a section on line 7 7 of Figure 4;

Figure 8 is a vertical sectional view of the trough;

Figure 9 is an enlarged detailed sectional view through the lower end of the packer.

Referring now more particularly to the drawings, the numeral 10 generally designates a carriage comprising upwardly converging corner elements 11, which may conveniently be formed from structural iron. At their lower ends the corner elements and corresponding sides of the frame are connected by longitudinally extending frame elements 12 on which are mounted wheels 13, preferably designed for operation along tracks 14 for a team. At their upper ends corner elements at corresponding ends are connected by transversely extending castings 15, each affording upper and

lower guide rails

16 and 17, while those at corresponding sides of the carriage are connected by headers 18. Adjacent the upper end of one corner member a motor 19 is mounted, the shaft of this motor having a worm gear 20 engaging a worm 21 secured upon one end of a transversely extending shaft 22, which is mounted in bearings 23 carried by a header element 24 connecting the upper ends of the transversely aligned corner members at this side of the frame. The header element 24 further provides bearings 25 for vertically extending shafts 26 paralleling the corner elements connected by the header, and having at their upper ends bevelled gears 27 meshing with bevelled gears 23 carried by shaft 22, and at their lower ends bevelled gears 29 meshing with bevelled gears 30 secured to the axles 31 of the associated wheels 13. Motor 19 should be a reversing motor and it will be obvious upon operation thereof the carriage 10 may be shifted in either direction along the rails.

Mounted upon the rail element 16 by supporting driving wheels 32 is a sub-carriage 33 which in addition to mounting the shaft 34 of the supporting and driving rollers engaging the track 16J mounts a further pair of rollers 35 for engagement with the track 16 and corresponding pairs of rollers 36 for engagement with the track 17. This carriage further provides a support for a motor 37, the armature shaft of which is provided with a worm 38 engaging a worm gear 39 secured to the shaft of the supporting and driving wheels 32.

The sub-carriage provides a vertically directed guide for a ram 40 having formed upon the exterior thereof a rack 41 with which meshes a gear 42 driven by a motor 43 carried by the sub-carriage.

Motors

37 and 43 are of the reverse type and it will be obvious that by controlling these motors the carriage may be caused to shift along the supports 15, or the ram 40 thereof caused to raise and lower if desired.

Supported from the lower end of the ram is a hopper 44, as in the present instance shown as biconic, the discharge outlet of which is in the form of a cylindro-conie nozzle 45, the larger end of which is downwardly disposed. At the upper end of the hopper and adjacent the lower end of the nozzle 45 vertically aligned bearings 4G and 47 are provided through which is directed a vertically extending shaft 48 which extends upwardly through the hollow center of ram 40, and forms at its upper end the armature shaft of a motor 49. To this shaft above the bearing 7 of the nozzle is secured a worm 50, which extends immediately above bearings 47 into the lower end of the hopper 44 and is tapered throughout its length to cor respond to the taper of the nozzle.

To the shaft beneath bearing 47 is secured a packing tool 51 which includes an upper spiral section 52 and a horizontal section 53 disposed at and forming a continuation of the lower end of this spiral section. This packing tool when in operation simulates the action of the molders trowel, the spiral section forcing the sand downwardly, while the horizontal section packs and smooths the sand.

As a means for supplying molding sand to the hopper I provide a receiving or storage hoppe 1 54 carried by the frame and an extensible conveyor mechanism 55 connecting hopper 54 with a supply hopper 5G carried by and discharging into the main hopper 44. The receiving or storage hopper 54 has its lower end formed by a casting 57 having a bottom in the form of a V-shaped trough. The lower end of this casting` is pivotally mounted upon a bracket 59 carried by the carriage, as indicated at 60, and this lower end embodies a shelf 61 or other support for a motor G2.

The armature shaft of this motor drives a shaft 63, which is mounted in a bearing G4 formed in the outer end of the hopper bottom casting through a gear 65. This shaft projects through the inner end of the hopper casting which is open and has secured thereto a worm 6G. Secured to the hopper casting 57 by a cantilever truss 67 and by longitudinally extending brace and guide rods 68 is a plate G9 in which the outer end of the worin shaft G3 has bearing. The rods G8 have slidably mounted thereon a yoke 70, which is pivotally engaged with the ram, as indicated at 71. This yoke surrounds supply hopper 57, allowing sullieient play for relative angular displacement of the yoke and hopper.

The side of the hopper adjacent supply hopper 54 has pivotally connected thereto, as at 72, a tubular conveyor trough section 73, the inner end of which projects through an opening 74 formed in the wall of the hopper, the outer end of which has extensions 75 through which the rods G8 are slidably directed. The adjacent end of the supply conveyor trough casting 57 has secured thereto a substantially V-shaped trough section 76.

Trough sections

73 and 76 are connected by telescopically engaged V-shaped trough sec tions 77, the outer ends of these trough sections at the bottoms thereof being connected by slotted links 78 limiting separation thereof. Each V -shaped trough section 77 has its edges rolled to produce eyes 79 slidably receiving rods 68.

In the use of apparatus of this character, the molding sand is placed in the receiving hopper 54 and the flask, core box or other element in which the sand is to be packed is placed between rails 14. The ram is then manipulated, the carriage and sub-carriage shifted to place the nozzle in the flask, after which operation of the packer and its feed worin and of conveyor screw 6G are started.

Sand is fed from the receiving hopper by the worin 66 to the supply hopper 57 and thus to the main hopper 44 and the feed screw 50. Due to the fact that the nozzle 45 increases in diameter downwardly, the sand may not pack in this nozzle, as in order to do so it must form a wedge within the nozzle against the action of the worm, which has a greater capacity adjacent its lower end than it has at its upper, in other words a greater discharging than feeding capacity.

The packing tool 51 acting upon the material fed thereto forces this material downwardly to pack the saine against material previously fed into the flask, and then flattens out and further packs the material. thus supplied. Alfter the supply delivered to the flask increases the ram may be elevated to maintain the packer in the proper level.

Tn filling an elongated flask this flask may be disposed longitudinally of the tracks 13, and the carriage caused to travel along the tracks during the feeding operation at a desired speed. The controls of the several motors will, of course, be centralized and preferably be arranged so that they permit manipulation thereof by an operator so positioned as to view the packing operation.

Through the use of the extensible conveyor trough it is possible to employ a relatively lined receiving hopper which may be convenient-ly replenished from time to time without distur ing the position of the sub-carriage or of the main carriage, and at the same time any desired adjustment of the position of the packing nozzle may be obtained.

rlhe structure illustrated is obviously capable of a considerable range of change and inocification without in any manner departing from the spirit of the invention, and l accordingly do not limit myself to such specilic structure exceptas hereinafter claimed.

l claim l. In molding apparatus of the character described, a travelling carriage, a vertically shiftable ram carried thereby, a hopper supported from the ram, a discharge nozzle associated with the hopper, and a rotatable packer at the lower end of said nozzle.

2. In molding apparatus of the character described, a longitudinally shiftable carriage, a sub-carriage supported thereby and shiftable upon the carriage transversely thereof, a vertically shiftable ram carried by the subcarriage, a. hopper supported from the ram,

`a discharge nozzle for the hopper, and a rotatable packing element disposed at the discharge end of the nozzle.

ln molding apparatus, a vertically shiftable ram, a cylindro-conic nozzle carried thereby and having its larger end downwardly disposed, a feed screw within the nozzle and having the same taper as the nozzle, a rotatable packer in the lower end of tho nozzle, and means for rotating said feed screw and packer. Y

Ll. ln molding apparatus, a vertically shiftable ram, a cylindro-conic nozzle carried thereby and having its larger end downwardly disposed, a feed screw within the nozzle and having the same taper as the nozzle, a rotatable packer in the lower end of the nozzle, a motor carried by the upper end of the ram, and a shaft driven by said motor and common to said feed screw and packer.

5. ln molding apparatus, a vertically shiftable ram, a cylindro-conic nozzle carried thereby and having its larger end downwardly disposed, a feed screw within the nozzle and having the same taper as the nozzle, a rotatable packer in the lower end of the nozzle, means for rotating said feed screw and packer, a stationary storage hopper, and a conveyor for supplying material from said storage hopper to said nozzle operable in all positions of the nozzle.

6. In molding apparatus of the character described, a travelling carriage, a vertically shiftable ram carried thereby, ahopper supported from the ram, a discharge nozzle associated with the hopper, a rotatable packer at the lower end of said nozzle, a storage hopper carried by the arriage, and a conveyor connecting the hopper of the ram and said storage hopper in all positions of the ram.

7. In molding apparatus of the character described, a longitudinally shiftable carriage. a sub-carriage supported thereby and shiftable upon the carriage transversely thereof, a vertically shiftable ram carried by the subcarriage, a hopper supported from the ram, a discharge nozzle for the hopper, a rotatable packing element disposed at the discharge end of `the nozzle, a hopper carried by the carriage, and a conveyor mechanism connecting the hopper of the carriage and the hopper of said ram in all positions of the ram.

8. In molding apparatus of the character described, a longitudinally shiftable carriage, a sub-carriage supported thereby and shiftable upon the carriagetransversely thereof, a vertically shiftable ram carried by the subcarriage, a hopper supported from the ram, a discharge nozzle for the hopper, a rotatable packing element disposed at the discharge end of the nozzle, a storage hopper carried by the carriage, a screw for discharging the contents of the storage hopper extending through the hopper of the ram, and an eX- tensible trough connecting the outlet of the storage hopper and the inlet of the hopper of the ram.

9, In molding apparatus of the character described, a longitudinally shiftable carriage, a sub-carriage supported thereby and shiftable upon the carriage transversely thereof, a vertically shiftable rain carried by the subcarriage, a hopper supported from the ram, a discharge nozzle for the hopper, a rotatable packing element disposed at the discharge end of the nozzle, a storage hopper pivoted upon the carriage, a discharge worm associated therewith and extended through the hopper of the ram, a support for the worm fixed to the storage hopper and pivoted to the ram, and an extensible trough for said worm connecting the storage hopper and the hopper of the ram.

10. In molding apparatus, a vertically shiftable ram, a cylindro-conic nozzle carried thereby and having its larger end downwardly disposed, a feed screw within'the nozzle and having the same taper as the nozzle, a rotatable packer in the lower end of the nozzle, means for rotating said feed screw and packer, and a horizontally shiftable carriage upon which said ram is supported.

11. In molding apparatus, a vertically shiftable ram, a cylindro-conic nozzle carried thereby and having its larger end downwardly disposed, a feed screw within the nozzle and having the same taper as the nozzle, a rotatable packer in the lower end of the nozzle, means for rotating said feed screw and packer, a horizontally shiftable carriage upon which said ram is supported, a station` ary hopper carried by said carriage, and means for supplying material from said hopper to said nozzle in all positions of said ram.

12. In molding apparatus of the character described, a travelling carriage, a vertically shiftable ram carried thereby, a hopper supported from the ram, a discharge nozzle associated with the hopper, a rotatable packer at the lower end of said nozzle, and means for operating said rotatable packer carried by said ram.

13. In molding apparatus of the character described, a longitudinally shiftable carriage, a sub-carriage supported thereby and shiftable upon the carriage transversely thereof, a vertically shiftable ram carried by the subcarriage, a hopper supported from the ram, a discharge nozzle for the hopper, a rotatable packing element disposed at the discharge end of the nozzle, and means for operating said rotatable packer carried by said ram.

14. In molding apparatus of the character described, a travelling carriage, a vertically shiftable ram carried thereby, a hopper supported from the ram, a discharge nozzle associated with the hopper, a rotatable packer at the loiver end of said nozzle,` a storage hopper carried by the carriage, a conveyor connecting the hopper of the ram and said storage hopper in all positions of the ram, means carried by the ram for operating said packer, and means carried by the carriage for vertically shifting said ram.

15. In molding apparatus of the character described, a longitudinally shiftable carriage, a sub-carriage supported thereby and shiftable upon the carriage transversely thereof, a vertically shiftable ram carried by the subcarriage, a hopper supported from the ram, a discharge nozzle for the hopper, a rotatable packing` element disposed at the discharge end of the nozzle, a hopper carried by the carriage, a conveyor mechanism connecting the hopper of the carriage and the hopper of said ram in all positions of the ram, means carried by the carriage for shifting the carriage, means carried by the sub-carriage for shifting the sub-carriage, and means carried by said ram for operating said packing element.

16. In molding apparatus of the character described, a vertically extending nozzle, means for supporting` the nozzle, means for feeding` molding sand to the upper end thereof, a. Worm Within and fitting the nozzle, a rotatable packing tool at the lower end of said nozzle, and means for operating said rotatable packing` tool and said Worm.

17. In molding apparatus of the character described, a vertically extending nozzle, means for supporting the nozzle, means for feeding molding sand to the upper end there signature.

BRADEN L. EUWELL.