US785908A - Sand-molding machine. - Google Patents

Description

PATENTED MAR. 28, 1905.

J. J. MOGLBLLAND.

SAND MOLDING MACHINE.

APPLIGATIOH FILED JULY 26. 1904.

Y 3 SHEETS-SHEET 1.

No. 785,908 PATENTED MAR. 28, 1905. J. J. MOOLELLAND. SAND MOLDING MACHINE.

APPi-IUATION FILED JULY 26. 1004.

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PATENTED MAR. 28, 1905.

J. J. MQOLELLAND. SAND MOLDING MACHINE.

APPLICATION FILED JUJY 26. 1904.

3 SHEETS-SHEET 3.

Finesse: aj. WW W UNITED STATES Patented Ma1-chf28, 1905.

PATENT OFFICE.

JOHN JAMES MoOLELLAND, OF LONDON, ENGLAND, ASSIGNOR TO THE SAFETY TREAD SYNDICATE LTD., OF LONDON, ENGLAND.

SAND-MOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 785,908, dated March 28, 1905.

Application filed July 26, 1904. Serial No. 218,266.

To all whom it may concern:

Be it-known that I, JOHN JAMES McOLnL- LAND, foreman iron-molder, a subject of the King of Great Britain, and a resident of 7 3 Harrowgate road, South Hackney, London, England, have invented certain newand useful Improvements in Sand-Molding Machines, of which the following is aspecification.

The present invention has reference to sandmolding machines wherein the mold boxes or flasks inclosing the patterns are carried by trolleys which run on tracks beneath a rammer-head which is used for ramming tight the sand in the flasks.

The object of the present invention is to provide suitable and convenient meansfor running the trolleys mechanically to and from the rammer-head in such manner that they may be used alternately or that either one may be used without the other.

In the accompanying drawings I have shown a machine embodying the present improvements. 7

Figure 1 is a plan View; Fig. 2, a frontelevation, and Fig. 3 an end elevation. A

a is a framing overhanging a track Z) and supporting in suitable guides a rammer-head 0. This rammer-head is worked by a rocklever (Z, coupled by a link 6 to the piston-rod of a compressed air or other cylinder f. g g are trolleys running on the track L. So far this arrangement is similar to that in common use; but I will now proceed to describe how the trolleys and mold-boxes are manipulated according to my present invention.

Upon the framing a is an extension which supports a pair of cylinders /l h separately and independently mounted and supplied with motive fluid by means of the pipes 2'. piston-rod of the cylinder it engages by means of its slotted end with a pin on the shortlimb of the cranked lever j, pivoted to the framing. The other limb of the lever j is jointed to a link A, connected to the trolley 9, so that when the lever is rocked the trolley will move to and fro. The piston-rod of the cylinder It is connected by asimilar lever and link k with the trolley g.

The

Z Z are hand-levers for operating the slidevalves of the cylinders it h, so that the latter may be caused by their pistons to pull the trolleys to and fro on the track at the will of the attendant toward and away from the rammer-head.

m n are spring-buffers to prevent the trolleys from overrunning their set positions.

The trolleys comprise plates 0, whereon the patterns rest, and through these plates pass pillars 19, upon the ends of which rest the mold boxes or flasks q. (See Figs. 2 and 3.) The pillars p are mounted upon frames 7' beneath the trolleys, which frames are supported on the rods of pistons s, working in cylinders 6.

Flexible pipes at a are provided, whereby pressure may be led to the cylinders, so as to raise the pistons, and with them the frames 9' and mold-boxes q, thereby lifting them'clear of the patterns, which are left behind on their plates.

In Fig. 2 I have shown in dotted lines the mold-box raised by the piston of the trolley g. From that position it is readily lifted by hand and placed ready for the casting.

Any convenient form of rammer may be employed.

Although the machine as illustrated shows trolleys which may be brought alternately into position under the rammer to have the molds rammed, there being a separate means for moving each trolley, either one with its mold-box can be moved to and fro while the other remains at rest, and hence in cases wherein it may be desirable the mold-box on one trolley alone may be used and no power need be wasted in moving the otherone to and fro.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. In a molding-machine comprising a rammer and trolleys for carrying mold-boxes beneath the said ra'mmer, the combination with said trolleys of motive-power cylinders and pistons working'therein, one such cylinder and piston for each trolley, and independent connections between each piston and its respective trolley.

2. In a sand-molding machine comprising a rammer and trolleys for carrying mold-boxes In testimony whereof I have signed my nanie beneath the said rammer,tl1e combination with to this specification in the presence of two subsaid trolleys of motive-power cylinders and scribing Witnesses.

pistons, one such cylinder and piston for each JOHN JAMES MCCLELLAND. 5 trolley, a lever connected With each of said \Nitnesses:

pistons and a link-rod connecting said lever ALFRED V. BISHOP,

with its respective trolley. HERBERT D. JAMEsoN.

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