DE210226C

DE210226C -

Info

Publication number: DE210226C
Application number: DENDAT210226D
Authority: DE

Description

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KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- Λ* 210226 KLASSE 31 c. GRUPPE- Λ * 210226 CLASS 31 c. GROUP

FRITZ TEPEL in SCHWELM i.WFRITZ TEPEL in SCHWELM i.W

Patentiert im Deutschen Reiche vom 14. April 1908 ab.Patented in the German Empire on April 14, 1908.

Die Herstellung der Formen für den Guß von Massenartikeln geschieht allgemein dadurch, daß die Formkasten über besonderen Modellplatten gestampft werden. Solche Modellplatten zeigen oft auf einer Seite beide Hälften des Modells, so daß sowohl obere als auch untere Formkasten von dieser Seite abgeformt werden können.The production of molds for the casting of mass-produced articles is generally done by that the molding boxes are stamped over special model plates. Such model plates often show both halves of the model on one side, so that both the upper and lower molding boxes are molded from this side can be.

Gegenstand der Erfindung, ist ein Verfahren zur Herstellung solcher Modellplatten, bei denen die - Modelle zur Herstellung der eigentlichen Formen mitverwendet werden und in einem gewöhnlich mit Gips ausgefüllten Formkasten bis zur Hälfte eingebettet liegen, wobei sie durch Haken in dem Gips festgehalten werden.The subject of the invention is a process for the production of such model plates, in which the - models are used to produce the actual forms and are half embedded in a molding box usually filled with plaster of paris, they are held in place in the cast by hooks.

Die Herstellung dieser Modellplatten geschieht bisher so, daß beispielsweise zur Herstellung zweier Abgüsse zwei Modelle bis zur Hälfte in einen vollgestampften gewöhnlichen Formkasten eingedrückt werden und dann der Oberkasten darüber gestampft wird. Darauf wird der Oberkasten abgehoben und umgedreht; in die Abdrücke des Oberkastens werden nochmals zwei Modelle gelegt, so daß aus dem Sande des Unterkastens die einen Hälften der beiden Modelle und aus dem Sande des Oberkastens die anderen Hälften der beiden Modelle vorstehen. Alsdann wird über jeden Kasten ein weiterer Kasten gesetzt, der gewöhnlich mit Gips ausgegossen wird, und in dem die Modelle durch eingeschraubte Haken 0. dergl. befestigt werden. Werden nun die letzteren Kasten abgehoben, so hat man zwei Modellplatten, über denen die zu den Abgüssen dienenden Kasten gestampft werden können, und zwar ragen aus der einen Modellplatte die einen Hälften der Modelle und aus der anderen Modellplatte die anderen Hälften der Modelle hervor, so daß durch Zusammensetzen der über diesen Modellplatten vollgestampften Formkasten zwei vollständige Formen erhalten werden.The production of these model plates has been done so far that, for example, for production two casts two models halfway into a crammed ordinary The molding box is pressed in and then the upper box is stamped over it. Thereon the upper case is lifted off and turned over; in the imprints of the upper case put two models again, so that one halves out of the sand of the lower case of the two models and from the sand of the upper case the other halves of the two Models protrude. Then another box is placed over each box, the usual one is poured with plaster of paris, and in which the models are attached by screwed hooks 0. Will now If the latter box is lifted off, you have two model plates over which the to the Casts serving box can be stamped, and that protrude from a model plate one half of the model and the other half from the other model plate of the models, so that by assembling the Molding box two complete forms can be obtained.

Während man bei diesem Verfahren zur Herstellung zweier Abgüsse vier Modelle bedarf, soll gemäß der Erfindung die Zahl der erforderlichen Modelle und Modellplatten um die Hälfte verringert werden, wobei ein an sich bekannter zweiteiliger, zusammensetzbarer Formkasten, dessen beide Teile je eine abnehmbare Seitenwand haben, zu Hilfe genommen wird.While this method requires four models to produce two casts, should according to the invention, the number of required models and model plates can be reduced by half, with a known two-part, assemblable Molding box, the two parts of which each have a removable side wall, used as an aid will.

Der verwendete Formkasten besteht in bekannter Weise aus zwei einzelnen Kasten, die jeder mit einer abnehmbaren Seitenwand versehen sind, so daß die beiden Kasten in der unten beschriebenen Weise sowohl zur Herstellung der ersten vollständigen Form übereinander gesetzt, als auch zur Herstellung der Modellplatte nach Wegnahme der Seitenwände nebeneinandergelegt und zusammengesetzt werden können.The molding box used consists in a known manner of two individual boxes that are each provided with a removable side wall so that the two boxes in the described below both to produce the first complete form on top of each other set, as well as for the production of the model plate after removing the side walls can be placed side by side and put together.

Solche eingangs gekennzeichneten Modellplatten wurden bereits durch Abgießen der Modellhälften hergestellt, gemäß der Erfindung sollen jedoch Modelle, die in doppelter Zahl vorhanden oder geteilt sein müssen, zur Bildung der Modellplatte verwendet, also in dieser eingegossen werden. Das Verfahren wird folgendermaßen ausgeführt:Such model plates identified at the beginning have already been made by pouring the Model halves produced, according to the invention, however, models that are in double number must be present or divided, used to form the model plate, i.e. in these are poured. The procedure is carried out as follows:

Mit den beiden Hälften des Formkastens wird zunächst unter Beibehaltung der abnehmbaren Seitenwände eine vollkommene Form von einem Modell in bekannter Weise herge-With the two halves of the flask, a perfect shape is first created while retaining the removable side walls from a model in a known way

7070

Claims

represents; then the two halves are placed after removing their removable side panels juxtaposed and in the impression of the half that formed the upper case, a second Model inserted so that half of both models protrude from the sand. Thereon the model plate is made in such a way that over the assembled box one another box is placed, which is usually

ίο is poured with plaster and in which the Models are attached by screwed hooks or the like, so that from the finished model plate in a known way, one half of each of the two models protrudes. Are now in a known manner over this single model plate the two boxes used for the production of the casting molds are crammed full, so receives By putting these two boxes together, you also get two perfect molds, to produce them, in contrast to the known method, only two models and a single model plate were required. The number of times to make a given Number of molds required model plates and models is thus reduced by half.

The drawing shows the individual stages of this process in FIGS. 1 to 5 and in FIG. 6 1 to 11 show a molding box suitable for implementation and not forming part of the invention represent.

The two-part molding box consists of two independent molding box halves which can be placed one on top of the other and in this position are obtained in a known manner by the pins c and the guides d . A side wall e or f is attached to each half of the box by means of screws and is therefore removable; on this side the boxes are provided with a half guide g at each end. The halves a and b can thus be assembled into a single box after removing the side walls e and_ /, the half guides g complement each other to form two whole guides; the halves are firmly connected to each other in this position by two straps h and screws i.

The procedure is now like this:

As shown in Fig. 1, by means of the two halves of the two-part molding box, which are assembled into a single molding box after removing a side wall can, first of all, a perfect form of J

a model k is produced by stacking and j ramming the two halves a, b . Then the upper half is lifted off, turned over and placed next to the lower half; the inner side walls e, f are removed and the two halves are put together to form a single molding box, and a second model k ^{1 is} inserted into half b, which previously formed the upper box, so that one half each is made of the sand of the assembled box of the two models (Fig. 2).

Above this box a, b the model plate is formed in such a way that a further box I is placed above it, in which the models k and k ¹ are fastened by screwed-in hooks m or the like (FIG. 3).

Then the box / after its contents have solidified is lifted off and turned over and you get a model plate in it, from each of which half of the two models protrudes (Fig. 4).

Two molding boxes tamped over this model plate each contain an imprint of two model halves, the combination of which creates two perfect molds obtained (Fig. 5).

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Process for the production of model plates for mass molding, which show both halves of the model on one side, by means of a molding box, which consists of two independent halves, which can be combined into a single molding box after removing one side wall, characterized in that by means of the two Mold box halves (a and b) an ordinary shape is made from half of the available models, then, leaving the models in the lower molding box half (a), the upper molding box half (b) is lifted off and turned over so that the model impressions contained in it are taken into account the other half of the models can be placed, then this upper molding box half (b) is combined with the former (a) to form a single molding box and the pattern plate is then produced over this composite molding box in such a way that another box (I. ) , which is usually filled with plaster of paris and in which the models are put through a screwed hooks (m) or the like. Are attached so that after solidification of the filling of the box (I) a finished model plate is obtained which has both model halves in the same number and over which the actual casting molds are to be made in the known manner.

1 sheet of drawings.