US1678072A - Tumbling barrel - Google Patents

Description

Ju'ly 24, 1928. F. w. NEvlLLE TUMLING BARREL Filed Nov. 50, 1925 2 Sheets-Sheet F. w. NEVILLE TUMBLING BARREL 'Filed Nov. so, 1925 2 sheets-sneer 2 Fig 5.

patented .lilly 24, 19.28.

yuuiran stares FREDERICK lli/'ALTER NEVELLE, OF

.Lronn ENGLAND, AssIGNoR 1ro J. W. .inclinan & COMPANY LILIVII'IIEL'D7 OF VULCAN NOR-KS, SALFORD, ENGLAND.

TUMBLING BARREL.

Application filed November 30, 1925,` Serial No.

AThis linvention relates to tumbling barrels with or Withouta sand blast adapted to Aclean 'foundry castings after being taken from the nilo-ulds or other articles and its object is to 5 )provide for the extraction or removal from the barrel of the abrasive material, tailings -and dust. j

Tu'inblin barrels for foundry castings -'and other articles hitherto` constructed have .in ecomprised a mechanically rotated, perforated 'drinn into which a jet of abrasive is projected through one end on to articles contained by 'the barrel. `Spent abrasive, foundry-sand, taili-ng and dust fall through the lbarrel perlxforations vinto an enclosing casing and are 'collected either pneumatically or mechanically ythe drum being supported and driven inside the casing by rollers which are con 'sequently Working under bad conditions With lconsequent heavy Wear.

Another construction comprises a double barrel, the sand passing through perforajtions inthe inner barrel being collected ready for re-use in theouter one.

According to the` invention the barrel kis AAconstructed with a conical outer barrel Which it rotates Will cause the loose material to flow itowards one end, a cylindrical perforated inner barrel to receive the castings or :io articles to be cleaned, two end casings be- 1t veenwhichthe barrels are clamped, one fitted 'with an inlet nozzle and the other with lan outlet chamber rotating with the barrel to :receive fthe loose material and discharge it through a. hollow1 central trunnion or passage land aneXtcrior chamber preferably perfolratedtolact as a sieve or screw into which the .ff-peut abrasive material, sand and tailings are finally dscl'iarged.

The inventionwillbe fully described With reference to the accompanying drawings.

Fig. l is a longitudinal section through the apparatus.

Fig. Q. is a transverse section. V

Fig. 3 is a section through the end casing and chamber on line 3-3 Fig. l.

Fig. 4t. is a front elevation of steel end plate.

Fig. 5 is a sectional elevation of discharge end or cabinet when a suction system `is applied tothe apparatus.

The tumbler barrel is built up of a conical outer barrel A of sheet or plate metal and a cylindrical perforated inner barrel B, the barrels being` clamped between and rotating 72,416, and in Great Britain February vs, 1925.

yWith end castings C and D by bolts .or studs a, the end C being `fitted With an injection nozzle E projecting through an aperture rtherein and the end D formed with a chamber l into which the spent abrasive sand and tailings are discharged from the .outer barrel A.

` The discharge chamber Z is of annulary or spiral forni opening through a radial part d1 into a hollow trunnion or passage ,and nis Afitted on .its inner face with a steel plate F which closes the end of the inner barrel B but is provided With annular slots f, forming openings between the outer conical .bar-

rel A and the dischargechamber ci. The dis charge chamber or passagefcZ-Z1 andthe hollow :trunniond2 are so shaped that `.material such 4as sand iwill be raised-and Vfall through the radial passage cll and be delivered out of the 4front of theytrunnion.

The perforated inner barrel B is `fitted into agroove c :in .the nozzle lend ycasting :C and into a groove fl in the end plate F metal. lto

metal and the conical outer barrel is fitted into .a groove@2 inithegnozzle end casting and into aA groove 72 intheplate F, the groove c2 Sbeing preferably tit-ted with a rubber or leatherring to make-adust-tight seal at-the nozzleiend ofthe apparatus.

The barrels A and B are provided with `apertures fitted with doors nl, b1 Vthrough which access may behad yto the 4interior of the conicalrinner barrel B for iplacing and removing'the articles to be cleaned.

The doors comprise van `inner perforated plate b1 conforming tothe contour ofthe barrel B and an outer plate al resting When in position onthe barrel A,'the plates ,being connected together by distance .bolts and clamped onto the barrel A by bolts and nuts.

A coarse conical screen G designed to separate the liner sandnand abrasive from the tailings 1s aliiXed to thexexterior of the delivery end'castingD to receive the material from the discharge passage and trunnion all, and an outer conical casing G1 preferably revolving With it is fitted around the conical screen G. The fine or screened material is delivered from the casing G1 to a chute g1 and the lumps and tailing are delivered from the screen G to the chute g, situated in a dust exhaust box H.

An injector nozzle E is mounted on a bracket at the end of the barrel and a dust shield K is affixed to the face of the nozzleend casting C surrounding the aperture and rotating in close proximity to a iiange e on the nozzle E. Pitched near the periphery of the dust shield K in the casting C a ring o1e holes /c is drilled obliquely 'to the axle of the barrel to permit any abrasive that may splash back through the nozzle opening c to be returned. to the barrel.

The end castings C and D are turned cylindrical on their peripheries to Jform treads which are supported upon and driven by four rollers M keyed to two shafts m rotating in bearings on the standards M1. To the standard M1 a gear case M4 is tixed carrying three gears M2, M3, M2, one gear wheel M2 keyed to each of the shafts m with an intermediate gear wheel M3 between them. rIhe gear wheel M2 is driven by a pulley M5.

When the apparatus is adapted to be used with direct pressure sand blast the dust exhaust box H is divided into two compartments by' vertical partition Ll with a sloping base or chute g1 leading to a hole in the side of the dust box. The base of the dust box I-I is inclined to lead to a chute or outlet g. rlhe top of the box is connected by a pipe 7L to a dust exhaust fan, The exhaust box H is mounted on one of the pillars M1.

Uien the apparatus is adapted. to be used with suction system sand blast a cabinet N (see Fig. 5) is substituted for the dust box H in which the abrasive instead of being delivered down a channel chute is collected in a central chamber a at the bottoni of which a suction system sand valve al is tted while tailings pass over to the compartment a2.

In operation abrasive is injected through the nozzle E on to objects placed in the perforated inner barrel B and as the barrels rotate the dust, tailings and abrasive fall through the perforations into the conical outer barrel A and slide down through the slots f in the plate F into the discharge chamber l in the end casting D, and are discharged from the hollow trunnion Z2 into the conical screen Gr. rEhe tailings and lumps are delivered over the end of the screen G while the screened and cleaned abrasive Jfalls on to the casing G1 and is delivered over the end on to the chute g,

maeva being deliveredusually from there into thek which is'normally connected to the airtight bag or box.`

IVhat I. claim as my invention and desire to protect by Letters Patent is l. A tumbling barrel for cleaning foundry castings comprising the combinationwith a perforated inner barrel to receive the castings, of a conical outer barrel yto collect the fine material as it falls through the perforations, a vcasting at one end with an aperture through which abrasive material may be injected, a casting'at the other end provided withy a discharge` chamber to receive the spent abrasive tailings and dust from the conical barrel and a hollow trunnion leading from the discharge chamber through which the` tailings and dust are discharged.

.2. A tumbling barrel for cleaning foundry castings comprising the combination with a conical outer barrel of'a cylindrical perforated inner barrelto receive thefcastings to be cleaned through the perforations of which spent abrasive tailings and dust fall into the outer barrel, a casting at one end of the barrels, an abrasive injector therein, a casting at the other end of the barrels `formed with discharge passages to receive the spent abrasive, tailings and *dustv from the conical barrel and a hollow trunnion therein through which lthe spent abrasive tailings and dust are discharged, a dust box tted over the discharge end of the barrels and a rotary screen attached tothe discharge end casting within the dustv box to separate the finer used abrasive rom the tailings.

In testimony whereof I have hereunto set my hand.

F. w. NEVILLE.

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