US1337585A

US1337585A - Molding-machine

Info

Publication number: US1337585A
Application number: US307319A
Authority: US
Inventors: Elmer O Beardsley; Walter F Piper
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-06-28
Filing date: 1919-06-28
Publication date: 1920-04-20
Anticipated expiration: 1937-04-20
Also published as: US1335642A

Description

Eo. BEARDSLEY AND w. P. PIPER.l

MOL'DING MACHINE. APPLICATION FIL'ED IuNE 28, 1919.

1,337,585. V Patented Apr. 20, 1920.

3 SHEETS-'SHEET I.

E. 0. BEARDSLEYvND W. F. PIPER.

MOLDING MACHINE.

APPLICATION FILED JUNE 28.19I9.

Patented Apr. 20, 1920.

3 SHEETS-SHEET 2.

:buzz"fz/L7M E. 0. BEARDSLEY AND W. F. PIPER.

MOLDING MACHINE.

APPLICATION FILED IuNE 28,1919.

Patented Apr. 20, 1920.

3 SHEETS-SHEET 3.

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ELHERO. BEARDSLEY, OF CHICAGO, AND WALTER F. PIPER, OF OAK PARK, ILLINOIS.

HOLDING-MAGHpIN E.

. Bpecication of Letters Patent.

Application tiled June 28, 1919. Serial No. 307,319.

' To all whom z't mag/concern:

Be it knownthat we, Enma O. Enanos- LEY and WALTER F. PIPER, both citizens of the United States and residents of Chicago, in the county of (,look and State of -Illino1s, and Oak Park, in the county of Cook and State of Illinois, respectively, have inventedcertain new 'and useful Improvements in Moldin -Machines of which the following is a fu clear, and exact description.

The invention relates to molding apparatus and more particularly to that type 1n which the sand or mold-material is forcibly projectedA into a flask by a rotor. An example of such apparatus is set forth in Patent No. 1,309,833, dated July 15, 1919.

The present object of the invention is to provide means for automatically controlling the path of movement of a laterally movable projector-head so that it will be operated to project sand into all portions of a flask to properly form a mold in accord- -ance with the pattern in the flask. In making molds with a projector-head, it has been found possible to operate the head through a predetermined path vin accordance with the pattern, so that the necessity of manually controlling the movement of the projector-head vcan be dispensed with.

A further object of the invention is to provide a controlling apparatus which may be readily changed to adapt it for operating the projector-head for making molds which' are diiierent in shape. A

The invention consists in the several novel features hereinafter set forth and more particularly deined by claims at the conclusion hereof.

In the drawings: Figure 1 is a side elevation of a machine embodying the invention. Fig. 2 is a side view of the ramming head, the case being shown in section on line 2,-2 of Fig. 1. 3 is a vertical longitudinal section. Fig. 4 is a detail of one of the controlling cams. Fig. 5 is a plan. Fig. 6 is a side elevation. Fig. 7 is a section taken on line 7-7 of Fig. 5.

The invention is illustrated as embodied in a machine comprising a mast 10 which is provided at its upper end with a post 11 on which is journaled, for horizontal rotation,

a tubular jib 12. which has a socket 13l around the standard 11. Anti-friction .bearings 13 are provided between post 11 ming head sustained thereb can swing hori, zontally and relatively to the jib. The pivotal connection between the arm and the )1b.cons1sts of a hollow bracket 1 5 or socket on the jib and a post 16 which is fixed to the arm 14 and mounted in anti-friction bearings 17 in said bracket. This form of connection4 makes it possible to locate the arm immediately below the jib. The casing 20 of an electric motor 21 is bolted to a bracket 22 on the lower end of post 11 and arm 14 comprises a hollow sleeve 23 which is bolted to one side of the motor-casing 20 and supports the ramming head and serves also as an inclosure for the shaft 24 which extends between the electric motor 21 and the rotor of the ramming head. This shaft is mounted in a bearing 25 in the outer end of the sleeve 23 and a bearing 26 adjacent the inner end of the sleeve. The rotor for the sand for filling the molds is fixed to the outer end of shaft 24.

A yoke comprising a hub 28 which is fixed to the sleeve 23, and arms 28 which have outwardly extending members 29 support the casing or stator of the ramming head. The casing has an arcuate or peripheral wall 30 and an integral outer side wall 31. The inner side of the casing or stator is open. This casing is bolted to the yoke.

A conveyor-chute 37 containing a suitable sieve or riddle 38 is supported from the jib 12 by resilient bars 39 which have their ends respectively secured to theV jib and to the chute. r:The inner 9nd of chute 37 is adapted to receive -sand from a suitable source of supply, such as a hopper 40 to which sand will be fed in anydesired manner. The outer end of chute 37 discharges into the upper open end of an inclined chute 35 which is fixedly mounted on the arm 14, and is supported by bars 36 so that the relation between the arm, chute 35 and the ramming head remains fixed. The upper end of the chute 35 and the outer end ofthe chute 37 are alined with the axis about which the arm 14 swings, so that the relative movement of the chutes will maintain the discharge into the chute 35. The chute 37 and the riddle therein are vibrated by a pitrnan 41 which is pivoted to chute 3 .operates shaft 43 and eccentric 42.

.mounted on said bracket and a pinion on the ously by gravity.

The chute 35, as more clearly seen in Figs. 2 and 3, discharges into the open inner side of the ramming head. The rotor is adapted to receive the sand at the openv side of the head and to project 'it downwardly into the mold, and comprises a hub 5() and a cylindrical body 51, integral with the hub and secured to shaft 24, 'an inclined guldefiange 52 which is flared inwardly from the periphery of the inner side of the cyhndrical body 51 and directs the sand onto the body 51. A curved outwardly extending bed 54, integral with the rotor body, 1s adapted to support the projector-blade 5.5. Said blade is curved to fit the bed 54 and 1s provided with an inner side wall 56 which has a curved edge 57 and is adapted to function as a positive shear-blade for the sand, so that as the rotor is revolving, the wall 56 will shear a portion of the sand issuing from the lower end of the chute from the sand in the chute. The rotor is operated at a high speed and its curved base and centrifugal force cause the wad of sand which has been separated from the supply in the chute 35 to wedge and impact itself in the corner between the outer end of the plate and the arcuate wall 3() of the casing, so that before the wad reaches the point of discharge, at 60, it will have been densified and packed into a proper mass for projection into the mold. This construction of ramming head is peculiarly adapted for high speed operation, such as has been found necessary to form good molds.

A protective housing 61, which is out of contact with the rotor, is suspended from the extensions 29 ofthe supporting yoke. The inner side of the stator is open and the wall 30 of the stator or casing begins at a point which is reached by the projectorL blade shortly before it reaches the incoming sand stream from chute 35 and terminates at 60, where the wad will be discharged truly downward into vthe mold. If that portion of the housing adjacent the discharge point is substantially alined with the casing where the wad is released, great wear occurs and this is measurably overcome by offsetting the wall 64 of the protective housing, so that it will be disposed in off-set relation with respect to the discharge point 60. A three- The automatic mechanism for controlling the path of movement of the projector-blade 4 and the placement of the sand into different portions of a flask comprises mechanism for automatically moving and controlling the jib and mechanism for automatically moving and controlling the arm 14 and by compounding the movements produced by these mechanisms any desired path of movement may be given to said head. A housing 61a is secured to the jib 12 anda cross-shaft 62 is journaled in said housing. A worm-gear 63 in said housing is keyed to shaft 62. A worm 64 on an inclined shaft 65l which has its lower end mounted in housing 61a and its upper end in bracket 45 drives gear 63. A ybevel-gear 66 on shaft 43 meshes with a similar gear 67 on the upper end of shaft El to drive the gearing in housing 61a which is adapted to operate the controlling mechanisms for the jib l2 and arm 14. A gear 68 -rigid with the socket 13 of the'jib is operated to rotate the jib by a rack 69 which meshes with said gear, is slidably supported on and by the jib and has a roller 70 at its outer end which is operated by a cam 71 on shaft 62. Cam 7l is provided with a groove 72 which is shaped to impart movement to the jib and in accordance with the path of movement of the jib which is necessary to ram and fill a flask, and in accordance with the pattern in the flask. For eX ample, if an arcuate'movement alone was desired, cam 71 would be formed to reciprocate the rack 69 to oscillate the jib within the desired limits. A gear 74 is rigid with the bracket 22 of the arm 14. A rack 75 is slidably mounted on the j ib 12, meshes with gear 74, and hasva roller 75a at its inner .end which extends into a groove 76 in a camy 77 which is secured to rotate with cross-shaft 62. This cam 77 and gearing are adapted to automatically operate and control the path of movement of the arm 14 relatively to the jib. The cam may be formed of any suitable shape and to swing the arm in any .regular or irregular path.

Cams

71 and 77 are changeably secured to shaft 62 so that cams of different shapes my be substituted which are adapted to impart different characters of movements or different strikes according to the path necessary to cause the projector head to traverse all portions of the flask which may be necessary to form Athe molds around different patterns or lill different flasks. The cams are simultaneously operated so that movements of the jib and arm will be compounded and by using different cams and different relative timing between the gearings, substantially any desired path of movement may be provided for the head at the-outer end of arm 14. This construction exemplifies mechanism for automatically operating a projector-head in a horizontal plane and in any predetermined path,

Lacasse according to the cams employed, and adapt the machine for automatic operation so that an operator for guiding and controlling the path of movement of the head will be dispensed with. l,

In the operation of the machine, the flask 80 is placed beneath and within rangefyof movement of the ramming head and approximately abouta foot below the lower Aend of the head.

The delivery of the sand from the chutebetween the delivery and discharge points of the stator. The operation of this apparatus at the high speed indicated-has been found, in practice, to produce good molds very rapidly. l/hen the rotor reaches the discharge terminal 60 of the stator, the wads of sand will be released and will be projected downwardly into the ilask.

While the projector is operating, the cams 7l and 77 and the gearings for the jib 12 and arm 14.- respectively operated thereby, will swing the ib and arm without attention on the part of the operator to cause the head to move in the path necessary to properly fill the flask and pack the sand around all portions of the pattern in the flask, so as to form a god mold.

A characteristic of supporting the ramming head by a jib and arm which are pivotally connected so as to permit onlylateral movement, and which permitthe ramming head to be moved laterally to discharge the sand into all portions ofy the flask, is that the angle of delivery of the sand into the flask is not varied by the movement of the ramming head to fill all parts of the flask. In practice, it has been found that the most eiicient angle of delivery is substantially vertical when the flask is horizontal, because at such angle of delivery, the wads will successively pack in or build up the mold with the least displacement of the previously delivered sand in the mold. When the angle of delivery is substantially obtuse or acute with respect to the plane of the mold, the

wads of sand, when projected into the flask at high speed will tend to displace and disrupt the sand which has been previously delivered into the mold.

The invention exemplifies a molding machine provided with a projector-head and mechanism for automatically controlling. its

movement to fill a flask and form a mold, ih which manual control for, and movement of, the head are dispensed with.

The invention is not to be understood as restricted to the details set forth, since these may be modified Within the scope of the appended claims, without departing from the spirit and scope of the invention.

, Having thus described the invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a molding machine, the combination of a projector for the mold-material, mechanism for driving the projector, means to movably support .the projector and mechanism for automatically controlling the path of movement of the projector over a flask.

tion of a projector for the mold-material,

mechanism for driving the projector, means to movably support the projector, and mechanism for automatically moving the projector over a flask to make a mold and controlling the path of movement.

3. In a molding machine, the combination of a projector for the mold material, mechanism for driving the projector, means to movably support the projector, comprising an arm and mechanism for automatically controlling the movement of said arm.

4. In a molding machine, the combination of a projector for the mold-material, mechanism for driving the projector, means to movably support the projector comprising a plurality of pivotally movable elements, and mechanism -for moving and automatically controlling the path of movement of said elements.

5,'In a molding machine, the combination of a projector for the mold-material, mechanism for driving `the projector, means to movably support the projector, `and mechanism comprising a cam for automatically controlling the path of movement of the projector over a flask.

6. In a molding machine, the combination of a projector for the mold-material,

mechanism for driving the projector, means .ing a plurality of pivotally movable elements and mechanism 4for moving and automatically controlling the path of movement v of said elements comprising cams.

8. In a molding machine, the combination of a projector for the mold-material, mechanism for driving the projector, means to movably support the projector comprising a jib and an arm pivoted-to the outer y end of the jib, means for automatically operating and controlling the movement of to movably support the projector, compristhe jib, and means for automatically oper-sn ing a plurality of plvotally movable eleating and controlling the movement of the arm.

9. In a molding machine, the combinaytion of a projector for the mold-material,

mechanism for driving the projector, means to movably support the projector and power-operated mechanism for automatically controlling the path of movement of the projector over a flask.

l0. In a molding machine, the combination of a projector for the mold-material, mechanism for driving the projector, means to movably support the projector and power-operated mechanism for automatically moving the projector over a flask to make a mold and controlling the path of movement.

11. In a molding machine, the combination of a' projector for the mold-material, mechanism for driving the projector, means to' movably support the projector compris-` ing an arm', and power-operated mechanism for automatically controlling the movement of said arm.

l2. In a molding machine, the combination of a projector for the mold-material,

mechanism for driving the projector, means ments, and power-operated mechanism for moving and automatically controlling the path of movement of'said elements.

13. In a molding machine, the combinationA of a projector for the .mold-material, mechanism for drivin the projector, means to movably support t e projector comprising a jib and an arm pivoted to the outer end of the jib, power-operated means for automatically operating and controlling the movement of the jiban'd means for automatically operating and controlling the movement of the arm. j

14. In a molding machine, the combination ofv a projector for the mold-material, mechanism fordriving the projector, means .to movably support the projector comprising a jib and an arm pivoted to the'outer end of the jib, poWer-operated-means for automatically operatmg and controlling 1 the movement of the jib, and power-operated means or automatically operating and controlling the movement of the arm.

l ELMER O. BEARDSLEY.

WALTER F. PIPER.