US1779485A - Core-making apparatus - Google Patents

Description

z.2s,193,0.` J RMCVWWE 1,779,485

CORE MAKING APPARATUS Filed March 6, 1928 2 Sheets-Sheet l ATTORNEYS Oct. A28, 1930. J. R. McwANE CORE MAKING APPARATUS Filed March 6, 1928 2 Sheets-Sheet 2 ...lv/IIIIHTIM ATTORNEYS Patented Oct. 28, 1930 @UNITED STATES JAMES n. YIi/IevvANn, or BIRMINGHAM, ,ALABAMA7 AssIGNon To MGWANE cAs'rv IRON 4PIPE COMPANY, QP PIRMINGIIAMALABAMA, AconPonATIoNoP ALABAMA PATENT yo1=1=1cxn conn-MAKING APPARATUS lApplication led MarchA 6,

Y preferred embodimentof the invention:

paratus, showing Fig. 1 is an elevation of a core making apthe pit for Vthe sand'in Vsection;and` "n f Fig. 2 isa sideelevation ofthesame,showing the pit in cross-section. i

f Apparatus for making green sand cores for use in casting pipes have 'been-in use for many years. In these, the sand is drooped through a chute onto the core bar while Ait is revolving. l The core knife cuts off the ex cessy sand, leaving the core the eXact'siZerequired. However, with thev usual type of green sandcore apparatus it is impossible to put the core bars in on one side and take them out on the other.. For the purposel of continuous operation,`itis very desirable to keep the cores going in one general direction, avoiding the loss of time and labor which is necessarily involved when the cores are moved into and out of the apparatus on one side. The purpose of this invention isto provide an apparatus making possible movement of the cores in one direction. Apparatus embodying the invention forms a useful element in a pipe foundry such as is-described and claimed in my application, Serial No. 220,731, filed September 20,1927.

Referring further to the drawings, there is shown a core making apparatus comprising a frame, a sand handling mechanism for delivering green sand to points above the ycore bar, a sand delivering member, and a rotary core bar support beneath the sand delivering member. As disclosed in the aforesaid application, the apparatus is located between the core bar reconditioning zone, and the assembling` Zone, where the core bars are assembled with the flask sections, and is open on one side to theruns or rails which are conveniently used to carry the core bars, and is open on the other side to that part of the plant where the core 192s. seria1N0.259,529.

bar carrying crane travels. The apparatus-is sobuilt as to permit uni-directional movement ofthe core bars therethrough, the core bars being moved laterally into the position whereKY green sand is distributed over them, and being moved laterally after the cores are formed thereon in the same direction to a position upon a core bar support such as is described `in my application, Ser. No. 257,708, filed F ebruary 28,1928. Y i,

The frame shown in the drawings comprises columns 5, beams 6 supported by `the columns and braced bylattice bars 7, and the necessary angle plates and crosspieces for supporting the motors andother parts without destructive vibration. The .columns are atthe opposite ends of the machine, and

the beams 6 are high overhead, so that a clear space through the machine is `provided for travel of the core bars laterally. "A coreV bar 8 is shown' in Figs." 1 and 2 as restingfona rotary support 9 such as kthe one described and claimed in my application entitled Gore bar supports filed August 30, 1927, Serial No. 216,467. Cross beams 1Q extend above the rotary support 9 and carry standard pneumatic or electric hoists (not shown) which are provided with members to lfit in the two ends of thecore bars to pick them up andfconvey them laterally toward and away from the core bar supports 9, moving them always in one direction. If desired, theremay be four such hoists, two on each beam-,10, permitting one pairto be used vfor conveying the core bars into core-forming position, and the other'pair for conveying cores onto the support previously mentioned. 1 Y n To elevate the green sand to a level well rabove the core bars, so that it 'may be distributed as uniformly as possible over the entire length thereof, and jalso to recover the green .sand which does not clingto the core bar but falls below, there is a flight conveyor 11 driven by a motor` 12 supported -on beams Y 6. V,For convenienceof illustration, the fiight length of the machine underneath the core bar supports 9 and which receives through a grating 14 the green sand falling off the core bar during formation of the core. The upper run of the iiight conveyor travels in a kind of a trough 15 extending the greater part of the length of the apparatus having an opening or series of openings (not shown) in the bottom thereof for distributing the sand as uniformly as possible into a chute 16 whose lower end tapers and terminates a shortdistance above the core bar, as shown. Preferably the chute 16 is vibrated, as by amotor 17, when sand is being delivered to the core bar, and means may also be provided to shut off iiow of the sand when desired. Such details are not ldescribed at length here, nor shown clearly in the drawings, because they lform no part of the present invention. A fresh supply of sand is delivered to the flight conveyor preferably at one end of the apparatus, and is brought to the apparatus by means of a belt chute or the like (not shown) according to the layout of the plant.

It will be clear that instead of using a single conveyor, as shown, three or four separate conveyors may be used to do the same work,

namely, one in the pit, one at either end of the pit and rising vertically, and one at the top of the apparatus. Any conveyor arrangement which will recover the sand from below the core bar supports and convey an adequate supply of it to such an elevation as to permit distribution upon the rotating core bar, but which affords a clear space through the apparatus for unidirectional movement of the core bars, is Ydeemed to be within the scope of the present invention.

Obviously the invention may be embodied in other forms.

What is claimed is 1. Core making apparatus comprising, in combination, an open frame; a sand elevator on the frame; said frame, because of said opening, being constructed and arranged for receiving the core bars on one side and for taking the completed cores out on the opposite side, and the sand elevator being located to one side, out of the way, thus making possible the movement of the core bars through the apparatus without retracting the path of movement into the apparatus.

2. Core making apparatus having an open frame providing a passageway permitting lateral movement of the core bars therethrough; and means for distributing sand upon core bars when supported in the passageway; the apparatus permitting movement of the core bars therethrough without interference with the movement of other core bars as they are brought up to the apparatus.

3. Core making apparatus comprising, in combination, an open frame; a conveyor for carrying core sand to the upper part of the frame; said conveyor operating in a vertical plane which is approximately at right angles to the direction in which the core bars move; the apparatus being suliiciently open to permit passage of the core bars in one direction through the apparatus; and means for distributing the core sand which is lifted by the conveyor over the surfaces of the core bars.

4. Core making apparatus comprising, in combination, an open frame; a conveyor for carrying core sand to the upper part of the frame; said conveyor operating in a vertical plane which is approximately at right angles to the direction in which the core bars move; said conveyor being continuous and running over the top of the apparatus to deliver the core sand above the core bars, and passing beneath the core bars to collect the core sand which falls below them; the apparatus being sufliciently open to permit passage of the core bars in one direction through the apparatus; and means for distributing the core sand, which is lifted by the conveyor, over the surfaces of the core bars.

5. Core making apparatus comprising, in combination, an open frame; a conveyor for carrying core sand to the upper part of the frame; the apparatus being suliciently open to permit passage of the core bars in one direction through the apparatus; a core bar support located in the passageway in the apparatus; a pair of horizontal beams at each side of and above the passageway to support core bar handling means and permit travel thereof with a core bar through the opening in the frame; and means for distributing the core sand, which is lifted by the conveyor, over the surfaces of the core bar.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature.

JAMES R. MCWANE.

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