US1123035A - Molding-machine. - Google Patents

Description

A. W. TANNER. MOLDING MACHINE.- APPLICATION FILED APR. z, 1916s,

191 289035 Patented Dec. 29, 191%l @A uw f @v/@7% 'E @Mommy oEEioE. y

ALFRED W. TANNER, OF ROCK ISLAND, ILLINOIS. 'i

HOLDING-MACHINE.

Specication of Letters Patent.

Patented Dec. 29, 1914.

Application met April a, 191e. serial m., 553,024. l

To all whom 'it may concern Be it known that I, ALFRED W. TANNER, a

citizen of the United States, residing at Rock Island, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Molding-Machines; and I do hereby declare the following to be a full, clear, and exact description of the in' vention, such as'will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in molding machines, and particularly to compressed air machines for closely packing and molding sand around the pattern orf mold in a flask. y

The object in view is the provision of a plurality of associated means for packing sand around a pattern or mold `by the use of compressed air which forces the sand properly in place and causes a proper distribution of the-same.

A-further object of the invention is the arrangement in a machine of the class de? scribed of a hopper provided with a pivotally mounted nozzle and a feeding screw located in the hopper for forcing' sand into .the nozzle, in combination with air feeding means for mixin with the sand during the discharge thereo so as to cause the sand to pack in the flask properly around the pattern.

With these and further objects in view, the invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter more fully deyscribed and claimed. 4

In the accompanying drawingsr-Fl ure 1 is a side elevation of an embodiment o the invention. Fig. 2 is a vertical sectional view through a hopper, nozzle and surrounding parts embodying certain features of the 1nvention.

l In forming a molding machine embodying the invention the same is provided witha hopper, containing sand to which hopper is connected a pivotally mounted. 'nozzle having any desired kind of opening therein. This nozzle is mounted so as to move in any direction so as to cause the discharge of sand from the hopper to any point in a iiask placed near the nozzle. In the hopper is varranged a feeding screw for positively forcing or feeding sand into the nozzle. In ad- Vdition to the screw for feedin the sand into the nozzle a tube is' passe through the shaft of the sand feeding screw and into a short distance of the nozzle for providing an air blast'for the sand in order that the ,sand may be properly packed around the pattern 1n the flask. A compressed air tank is'provided for maintaining any desired air pressure for the air pipe leading tothe discharge snozzle and also for providing pressure for,

a hand nozzle which is used as an auxiliary means for blowing of any loose sand or foreign substance that may be in, or on-the mold, at any point desired.

In order that the invention may be more clearly understood, an embodiment of the same is shown in the accompanying drawings in which- 1 indicates a hopper for containing sand. This hopper may be of any desired slze, but is preferably formed conical and merges into a discharge pipe 2 having a partiglobular enlargement Sover which lits a similar enlargement 4 of nozzle 15.

This

arrangement of nozzle aridV enlargements provides a universal joint arrangement for the nozzle in order that the same ma be moved as desired for directing and pac g sand in liask 6.

Mounted in hopper 1 isa feeding screw 7 which tapers approximately pro ortionately to the taper of hopper 1 an is designed to stir the sand in hopper 1 and to.

force the same in a steady stream into pipe 2 and from thence out nozzle 5. In order that screw 7 may be moved or rotated, the shaft 8 thereof has secured thereto a gear 9 which meshes with gear 10. Gear 10 is carried by shaft 11 which receives power through a belt 12 and pulley 13. When screw 7 is not working belt 12 is shifted to the idler 14 so that the various parts will not be under any strain or tension. In order to shift belt ,12 treadles 15 and 16 areprovided which are connected to belt shifter 17 by means of cables or ropes 18 and 19. These cables or ropes pass over suitable pulleys 20 and 21 and are connected to belt shifter 17 in any desired manner for' causing the same to slide in its supports 22 and 23. B this arrange- 'ment whenever it is desire to feed sand from hopper 1 treadle 16 is depressed for moving -belt 12 to pulley 13. When this is done power istransmitted through the lmechanism above set forth toscrew 7 for causing the same to force the sand into n'ozzle 5 and from thenceinto ask 6. At the same time that screw7 is placed in opera- 8 of sc1ew7 and downwardly to near the lower. end of pilpe 2 for mixing the sand just previously to t e discharge of the same for causing the sand to be sprayed and packed tightly about the pattern or mold' in the flask, If for any reason there should .be any loose'sand or foreign substance in, or

on the mold, air may be turned Aon at 29 for 4sl'ipplying" compressed air to pipe 30,w hc'h air `will be discharged out lof nozzle A3l and thereby remove 'said loose sand. or foreign. substance.

Pipe 30 is' a flexible pipe and may be of any desired length, so that nozzle 31 may be manually moved about ilask 6 for blowing olf loose vsand or foreign substances.

Tank is maintained supplied with com.- pressed air by a suitable pump 32, but obviolisly if Ithere is an air lin'e available, p'r jss ure therefrom 'can be utilized in lieu Y of the tank and pump.

In testimony whereof'I aliix my in presence oftwo witnesses. vthe @1a-ss described, a ALFRED wrTANNER,

` sand containing hopper, a nozzlehavihg a i universal joint connection `with the lower portion of the hopper, a'positive lmechanica l feed for forcinglthe sandl from the hop- 4per into the nozzle, means for discharging compressed air longitudinally centrally through the nozzle during the delivery of sand Itherethrou h, the hopper and nozzle being disposed n' the feeding of the sand through the nozzle by gravity, and means supplemental to the air supplypipe for delower portion of the hopper-,a screw, within the hopper, means forl rotating the screw for mechanically forcing sand downwardly in the hopper' 'tdw'ard the nozzle thereof, the screw-being axially tubular, and means for deliver-in -air under pressure through the screw ang'delivering the sand into the nozzle axially thereof at a point .below the lo'wer end of the -screw.

Y Witnesses: n

R. U. BAUGHMAN, `F. W. JoHNsoN.

signature

Images