US1353472A - Foundry practice - Google Patents

Description

A. HAASE.

FOUNDRY PRACTICE.

APPLICATION FILED NOV. 3. I919.

1,353,472. Patntedsep 21,1920.

fizz/enfan ARNOLD H'AAsE UNITED STATES PATENT OFFICE.

ARNOLD HAASE, or sen r zAivcisoo, oAL FoamA- I FOUNDRY PRACTICE.

T 0 all whom it may concern.

Be it known that I, ARNOLD vH AsE, a citizen of the United States, and a resident of the city and county of SanFrancisco, State of California, have made a new and useful inventionto wit, Improvements in Foundry Practice; and I do hereby declare the following to be a full, clear, concise, and

exact description ofthe same.

The invention relatesto improvements in foundry practice and more particularly to patterns and the method of molding and casting.

The primary obj ect of the invention is to reduce the cost of production, by reducing the amount of labor and equipment in the production of a given quantity of castings. Other objects and advantages will appear as this description progresses. r

In this specification and the annexed drawings, the invention isillustrated in the form considered to be the best,but it is to be understood that the invention is not limited to such form, because it may be embodied in other forms; and it is also to be understood that in and'by the claims following the description, it is desired to cover the invention in whatsoever form it may be embodied.

In the accompanying one sheet of drawings, I

Figure 1 is a plan view of the core, print side of a pattern andmatch'board constructed in accordance with this invention.

Fig. 2 is a vertical section of the same, locked in a flask and -taken on the line 11 11, Fig. 1.

Fig. 3 is a similar view of the flask with the pattern removed and the core in place. Fig. 4 is a cross section of the same, taken on the line IV-IV Fig. 3.

Broadly stated, the invention involves the duplication of patterns on opposite sides of a core print and connecting all of the patterns by suitable runners connected through a core, whereby the capacity of the flask is doubled with very little additional labor.

In detail, the construction illustrated includes the match board 1 provided with the conventional guide plates 2 adjustably attached to the match board and having the guide notches 3 within the openings 4 through the match board. The core print 6 is fixed to the face of the match board. The patterns 7, 7 are fixed to the face of the core print 6 and connected by the runners 8, 8

arrangement all of the patterns are Specification of Letters Patent. Patented Sept, 21, 192() Application filed November 3, 1919. Serial No. 335.449.

in the usual manner.

The patterns 9, 9 are fixed to the opposite side of the match board 1 1 and connected by the runners 11. These patterns may be similar inform, as shown, or mayconsist of a variety of shapes, Where'- by a'single casting'may be duplicated or a set of articles or a varietyof castings may be produced in a single cast, in accordance with the combination of patterns arranged on the match board. Y

Referring to Fig. 2 the match board isi'ndrag and the follower board 17 laid thereon; the whole is then inverted as shown in Fig. 2. The sprue 18' provided with the pins 19 is inserted so that these pins extend into sockets provided in one of the runners 8. The cope is then rammed full of sand,

in the usual manner, to form a mold ofthe patterns 9. The sprue 18 is then removed to form the gate 19' through the cope.

After ramming, the-cope is then lifted gently from the drag 12 and laid to one side; then the match board is removed from the drag; then the core 21, that is formed in the exact shape of the core print 61is placedwithin the print impression in the drag; then the cope is carefully replaced and alined with the drag'as shown in Fig. 3.

The core is provided with a runneropening 22, transversely joining the gates 23 and 24 formed by the runners 8 and 11. By this joined by the gates and runners, With the sprue opening 19". The cope and drag are now clamped together or weighted in the usual manner ready for casting.

The manner of casting is conventional.

The molten metal is poured into the sprue hole 19' and flows through the intercommunicating gates and runners to fillall the molds above and. below the core 21, that divides-the cope and the drag,withinwhich complete castings have been made separated by the core 21. This method differs in operation from conventional practice, in which fa part of the casting is made inthe drag and the rest of the same casting is made in the cope, the parting line being between the cope and the drag. In the present instance the parting line is the surface of the core 21, which performs the function of drag to the cope and cope to the drag, thu's'doubling the capacity of the flask with very slight additional labor. v

The sprue 18 may be duplicated on the opposite runner 8 to form a riser or shrinkage gate and all other expedients in foundry practice such as the'placing of cores, chaplets and other practices desirable in patterns are susceptible of adaptation in the practice of this invention. 7

The match. board is a common expedient in molding practice 'to save time and render repetition in molding a given pattern. more uniform. In the practice of this invention the match board can be dispensed with and the patterns attached directly :to the opposite sides of the core print 6, the operation of molding and ramming into the cope or drag being in accordance with the practice in vogue with patterns having core prints.

In other instances, certain forms of patterns are susceptible of treatment by this method, by eliminating the core print, by laying the core 21 on the follower board 17, with the patterns superimposed thereon, then ramming upon the drag in the usual manner, then invertingthe drag, removing the core, then removing the patterns beneath, then replacing the core, then superimposing the patterns upon the opposite side of the core ramming up the cope, then separating the cope from the drag and removing the patterns, then replacing the cope and locking 7 up the flask and casting as described. The

gates runners etc. connecting the various molds formed in v this manner are formed through the core so that the molten metal flows to all molds. 7

Having thus described this invention, what I claim and desire in Letters Patent is 1. The combination of a plurality of complete patterns; and a match board and a core print interposed between said complete patterns.

2.. .The combination of a plurality of complete patterns facing in opposite directions,

and a match board and a core print interforming molds in the drag and the'cope of a flask, and separating said molds by a core betweensaid drag and cope; pouring molten metal into said molds permitting the metal to cool and separating the independent castings from the molds and the 'separating' medium. 7

5 The method of casting consisting in forming independent molds in the'separable members of a flask; interposing a separating medium between the molds in the flask members filling said independent molds with molten metal through intercommunicating passages in saidseparating medium permitting the metal to 'cool and separating the independent castings from the molds and the separating medium. 7

6. The method of casting consisting in forming molds in the drag and cope of a flask, separating said molds by a core between said drag and cope, said core having gates connecting said molds with passages connecting said gates; pouring molten metal into said passages permitting the metal to cool and separating the independent castings from the molds and the separating medium.

In testimony. whereof, I have hereunto set my hand at SanFrancisco, California, this 18th day of October, 1919.

1 ARNOLD HAASE. In presence of LINCOLN V. JoHNsoN.

Images