US331553A - Gael schlickeysen and eduaed beeslaueb - Google Patents

Description

Patented Dee. 1, 1885.

N. PETERS. Phaln-Lrlhogmphnr. Wishngin, D. C.

(No Model.)

SCHLICKEYSEN 8v E. BRESLAUBR.

SAND MOLDING MAGHINE.

Unirse .tirarse llin'rnnrr tinten.

CARL SCHLCKEYSEN AND EDUARD BRESLAUER, CF BER-LIN, GERMANY, ASSIGNCRS TO SAID SCHLICKEYSEN.

SAND=MLDENG lt'lACiilblE.

SPEOEEFECATION forming part of Letters Patent No. 331,553, dated December l, 1885.

Application filed July 3, 1885; Serial No. 170,610. (No model.)

To all whom. it may concern:

Be it known that we, CARL SOHLIOKEYSEN and EDUARD BensLnUnn, both ci Berlin, in the Kingdom of Prussia, in the Empire of Germany, have invented a certain new and useful Improvement in Machines for Making Molds for Castings, of which the following is a speciiication.

The material for making castings of iron, composed of properly selected earth, technically termed sand,7 in a slightlydampcned condition, requires to be compressed against the pattern to a carefully-determined extent. lf the sand is too slightly compressed, it fails for obvious reasons. lf the sand is compressed too tightly, so as to not allow the air and gases to escape, it equally fails to perform its function properly. Some parts of a pattern being much lower than others, the melder in operating by hand can vary the force of the blows in ramming the sand at different points, so as to produce an equablc effect. There are peculiar difliculties in the way of obtaining the like effect by machinery. 7e have devised machinery which attains this end.

Our machine produces molds with rapidity and economy, requiring no special prepa` ration to adapt it to receive patterns of a great variety of forms, and to produce a mold every part of which is compressed to about the proper degree. Ve operate by means of a device analogous to a screw-propeller, forcing the sand into the box, technically termed flask,77 with great uniformity of pressure. Corresponding` screws have been before used in machines for making tile and brick. We have combined the parts adapting the mechanism to operate successfully in producing molds. Ve have arranged for operating the machine conveniently and rapidly. XVe can` with modifications work under widely-vary ing conditions.

The accompanying drawings form a part of this specification and represent what we consider the best means of carrying out the invention.

Figurel is a central verticalsection through the entire machine, and Fig. 2 is a plan view 0f the lowerportion. The remaining iigures are vertical sections showing modifications. Fig. 3 shows the upper portion of the machine made portable and used to lill a stationary mold. Fig. i represents two conditions, the right side corresponding to Fig. 8, and the left side corresponding to Fig. l,with modifications.

Similar letters of reference indicate corresponding parts in all the iigures where they occur.

Referring to Figs. l and 2, A is a fixed casing of cast-iron.

C is an upright shaft operated by wormgear C and carrying screw-blades C2. It receives rotary motion from a worm, B2, carried on a rapidly-revolving shaft, B, driven by a belt, B3, running on fast and loose pulleys, (shown by dotted lines B.) Theshai'tCis supported in a long bearing, or, more properly, two bearings, in the upper portion of the casing. The sand, properly screened and prepared, is introduced by hand or by machinery, either constantly or at short intervals, in the upper portion, A', ofthe casing, and the screw-blades traverse in a smooth cylindrical portion, A2, of the casing. The sweep of the screw-blades or wings nearly lls the cylindrical interior. The bottoni A2 of the cylindrical casing is nished evenly.

At suitable points on the fixed frame-work are series of stout supports or shelves A5. D is a table supported thereon by dogs E,which are carried in suitable bearings on the under side of the table and pressed forward by springs, one of which is shown at F. These allow the table D to be adjusted to various heights to accommodate desks of different depths. A considerable cavity is formed in the center of the table D, in which plays a lifter, G, operated by levers H, arranged to be actuated by the foot of the attendant to elevate the lifter G a little above the main surface of the table D when desired. The center h of these levers His supported in the table D, and is raised and lowered with the latter in adjusting the machine for different flasks.

M is a moldboard.

M Mz are respectively the cope and drag of a iiask having lugs and guide-pins, as usual.

IOO

P is the pattern. The sand is marked s.

In the drawings, to the right of Fig. 1, we show the condition of the flask when we commence to make the molds according to our invention-that is to say, with the drag filled with sand and the pattern in place.

After a flask is placed in position and before the sand is forced down into it, the treadlelevers H are depressed by the attendant. Through the action of the levers H the lifter is raised to press the upper edge of the cope into firm contact with the lower edge of the cylindrical case A2. A shipper, (not shown,) which may be of any ordinary or suitable construction, operated by a lever worked by the attendant, controls a belt, B3, which, running alternately on and off the fast pulley indicated by the dotted circle B in Fig. 1, starts and stops the screw-bladesv at will.

I is a ring loosely inclosing the cylinder A2. Fins ainserted through the upper ends of the slots fi into corresponding sockets in the cylinder A2, hold this ring firmly up, so that it is of no effect when the machine is used as above described; but under different conditions the ring I serves as a sand-box, as seen in Fig. 3.

Assuming the operator to be familiar with making castings by hand, and to be provided with proper patterns and flasks, thek operation may proceed rapidly.

Fig. 1 shows a flask in position in the machine, the screw-blades having operated to force down the sand and pack it properly in all parts of the interior, so as to constitute a complete mold, requiring only an opening and closing of the flask, and the removal of the pattern,and the establishment by any ordinary or suitable means of the sprue and gate through which the melted metal shall be introduced. The foot of the attendant resting on the treadle gives warning when the lifter is forced down by the continued strong action of the screw-blades G2, so that the upper edge of the cope is a little out of contact with the cylinder A2. Vhen this occurs,the attendant shifts the belt B3 and stops the rotation of the shaft C. The sand is then cut across above the cope by the use of a fine wire provided with handles and operated in the obvious manner. Then the treadle H is released, the lifter G, with its loadi. e., the drag M2 and cope M, both packed with sandsinks out of contact with the sand above, and the flask M2 M may be moved away and a fresh one introduced. The right-hand side of Fig. l shows a flask ready to be slid upon the lifter and to be raised so soon as the flask which now occupies that position is removed.

By drawing outward the several bolts or dogs E and raising or lowering the table D it may be adjusted to various heights.

Parts of the invention may be used without the whole. Some of the most obvious modications are shown in additional figures, and will be briefly described.

Fig. 3 shows the machine operated,as above described,as a portable machine. In this figure the pattern P has been set in good moldingsand s, which is assumed to rest on or in the iioor of the foundry. M is a cope properly placed thereon to receive the sand to form the upper part of the mold. In this figure the pins a2 have been removed, and the ring I has been allowed to descend, so as to form a sandboX resting on the top of the cope. Thus conditioned, the operation of the screw C2 forces down the dampened sand until not only the cope M', but also the ring I, is tightly filled with sand. Now, awirebeing used, asbefore, to sever the sand between the cope M and the ring I, the machine is lifted off and moved to a new place, where the operation may be repeated. 'In this mode of working, the coinpressed sand which fills the ring I should be expelled by hand or by working the screw C2 after the machine is removed from one cope and before applying it on another. The sand thus dropped may be subsequently screened or otherwise broken up and thoroughly loosened, in which condition it is ready to be again shoveled or otherwise put into the upper portion, A, of the machine and reused. Ve esteem it important that the sand is forced down afresh upon the pattern in each instance without having been previously compressed.

Fig. 4 shows on the right-hand side the same mode of working as Fig. 3, except that a number of small castings are being made at the same operation, instead of one large one, and the flask extends out under the iiange of the ring I.

The left-hand side of Fig. 4t shows the general mode of working illustrated in Fig. 1; but in this modification on the left side of Fig. 4 the ring I is omitted and-the cylinder A2 is `provided with a permanently-attached flange. This flange will rest fairly on the cope, and the operation will be successfully conducted with considerable variations in the size of the flask. In this modification shown in Fig. 4 different mechanism from that shown in Fig. 1 is employed to raise and lower the lifter G. In this a rack is attached to the lifter, and it is operated by gearing. The gearing is driven by a crossed belt from the shaft B, suitable friction-clutches (not shown) or other convenient means being employed to engage and disengage the parts, so that this mechanism can be operated to raise the lifter and its load while the screw is at rest, and that the screw is operated to force down the sand while the lifter is at rest. WV is a brake, which serves usefully to allow the proper yielding when the iiask is pressed full. This brake also may serve usefully in controlling the lowering of the lifter and its load when it is desired to remove the flask.

It is not essential that the screw-shaft be always vertical. It may be worked in variouslyinclined or even horizontal positions. We believe it practicable to work the machine in IOO IIO

an inverted position, forcing the sand upward to ill the flask from below, if such mode of working shall lunder any circumstances be required.

Ve propose in some cases to use a large flask with a small cylinder, A2, andV screw, shift-ing the flask relatively to the screw or the screw relatively to the flask, so that all parts of the flask shall be acted on in succession.

The operation of the machine is as follows: The drag of the flask having been filled with sand and the pattern placed in position, either the cope is raised up close to the case A or said ring I is brought into contact with the cope, and the machine is set into operation to complete and pack the sand inthe flask. As soon as the packing is completed, the cope is, by the wire mentioned, struck off from its connection with the casing A or ring I, and is completed for use.

In either case describedthat is to say, whether the drag is employed or the east is made on the foundryfloorthelower half of the mold Vis packed and sifted with partingsan'd in a manner well known to those skilled in the art.

Ve claim as our invention- 1. The combination,with casing A, the drag and cope, and the screw G2, of the lifter G, lever H, and the adjustable table D, as set forth.

2. In a machine for making molds for castings, the casing A, the table D, and means for adjusting it at different heights, in combination with the lifter G and its operating means, and with the screw C2 and its operating means, arranged for joint operation as herein specified.

3. In a machine for making molds for easting, the ring I, having vertical slots t, adapted to rise and sink around the cylinder A, in combination with the screw C2 and with pins ai, as herein specified.

4. The combination, with the cylinder A2, the screw C2, and its operating means C B B B2, Vof the ring I, having slots z', and the pins a2, operating in said slots, as and for the purposes set forth.

In testimony that' we claim the ,foregoing as our invention we have signed our names in presence of two subscribing witnesses.

CARL SCHLICKEYSEN. EDUARD BRESLAUER.

Vitnesses:

B. Roi, M. W. MOORE.

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