DE383940C - Process for the production of chain molds - Google Patents

Description

Process for the production of chain molds. For this registration is according to the Union Treaty of z. June 191I priority based on registration in the United States of America from .4. May igi8 claimed. The invention relates to a method of making sand molds for casting continuous chains with the help of multi-part models.

The purpose of the invention is to make the sand molds without using them to make inserted cores or moldings castable.

The method according to the invention consists in that two quarter models together with the associated half model part for the connecting link, the one the boxes with the sand mold in them to expose the middle piece of half of the model part, pulls this piece out, connects both molded parts and then pulls out the other part models for half the model part, whereby half of the mold is completed. An identical second half-form is on it brought into congruence with the former, so that a mold for each two half links with the associated connecting link. By rubbing such partial forms together Chains of any length can be cast after inserting finished links.

The invention is shown schematically in the drawing.

Fig. I is a plan view of a model for making a half-mold.

Fig. Z is a vertical section along line II-II: Fig. I, where the sand is already tamped in the box.

From. 3 shows the model board and the model parts attached to it.

Fig.q. and Fig. 5 are side views of the lower and upper flasks.

Figure 6 is a diagram of a finished half-mold.

Fig.7 shows a continuous series of shapes with inlaid, already previously cast intermediate links.

Fig. 8 is a plan of the completed one and verbufidenen Shapes that are provided with sprues to make all supplementary links the same Time to be able to pour.

For the production of the chain, the -lolelle are placed on the model board 3 and .4 attached, each of which corresponds to a quarter of a link. Means Dowels are also on board a in one to the plane of parts 3 and d. right-angled Level the pieces 5, 5 'loosely attached, which together with your piece 6 form the shape form half a link. The pieces 3 u1111 d. are a trifle larger than a finished handlebar and serve to create indentations in the molds, in «-which at the time of completion of the chain used the previously cast handlebars will. The model piece 6 has a downwardly projecting center web 6a, the web of a handlebar.

A hinged frame 7 is placed on the board a. As Fig. I shows, this frame or molding box consists of four side plates that are rigid at I_, L ' connected, hinged at 1-I and connected by a latch at 1 " are. If the latter is loosened, the box can be opened and removed from the mold will. When the hasten is attached to your board, uni becomes the models Stamped sand up to line-1 so that the top of the model piece 0 above line A remains free. Then release powder is applied to the molding sand and the upper exposed part of the model is scattered, and the hinged box 8 is on the box 7 placed, both boxes through the guides 9 in exact coverage being held.

'Then sand up to the surface of the box 8 and do the sprue io stamped around. Latter; is then removed and the upper box 8 becomes finite the S = ind located above the line _1 lifted off. The model part 6 is then taken out of the sand. Now we: - the joint along the line .I with molding paste painted, and the box 8 with its sand is then put back on. The whole The form is then turned over and the board z is lifted off. The loose -lorlell pieces 5. 5 'can then be removed by hand, whereupon the frames 7 and 8 are unlocked and be removed. The> o produced form, which can be dried if necessary could, forms the cap or upper half of the overall shape.

To form the lower half of the mold, the same organ is used repeated, only the sprues are omitted. A sufficient number such mold bases are placed next to one another in a closely spaced series, and in the depressions formed by the model pieces 3, 4 are preferably already Previously cast handlebars (hooks) inserted. Then «-ground up the upper parts of the mold Set the mold bases so that now the molds for those handlebars are ready which are the connection between the finished handlebars inserted in the molds should form.

The metal is now poured in through the sprues io ', whereby the Connecting links are completed and a whole piece of chain is completed. Chain pieces of any length can be connected by connecting the end shackles of the two pieces to be connected into a common shape and a connecting one Intermediate chake pours in the manner described above.

If desired, the entire chain can be passed through the sprues at once iö and joa, as indicated in Fig. 8, can be poured, but it has been shown that Let more even results be achieved when you put all of the in one plane lying handlebars together. Accordingly, preferably first of all the ice, third, fifth, seventh link etc. cast in a common plane, whereupon (lie. "intermediate link, i.e. the second, fourth, sixth link, etc., in the type described above can also be poured in a common plane, worltirch the chain is completed.

Claims (1)

PATENT-ANSPRUCII: Process for the production of chain molds with Aid of partial models, characterized in that the form is made up of lined up The individual parts are put together in two-part boxes placed one on top of the other are formed, with the part of the mold located in each box by a split half-hook model is formed, which connects two quarter-hook models, so that by separating the two parts of the box, a piece of one quarter of the shaky impression training split half-hook model is exposed, whereupon after removal of this piece the two molded parts are connected again and the remaining pieces of the half-chakin model and the quarter-chakin models removed, in such a way that the two boxes can be assembled ready for casting, without special sand cores to have to manufacture and insert.