DE249101C

DE249101C -

Info

Publication number: DE249101C
Application number: DENDAT249101D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- M 249101 KLASSE 31 h. GRUPPE- M 249101 CLASS 31 h. GROUP

MICHEL JOHANN LACKNER in DORTMUND.MICHEL JOHANN LACKNER in DORTMUND.

Schabloniertellers.Stencil plates.

Patentiert im Deutschen Reiche vom 17. Februar 1910 ab.Patented in the German Empire on February 17, 1910.

Den Gegenstand der Erfindung bildet eine Vorrichtung zur Herstellung von Lehmformen für gegossene Muffen- und Flanschenröhren durch Schablonieren. ·The subject of the invention is a device for the production of clay molds for cast socket and flanged pipes by stenciling. ·

Bisher hat man gußeiserne Rohre in stehenden Sandformen hergestellt, welche dadurch gebildet werden, daß in dem Formkasten der Sand um das Rohrmodell herum festgestampft wird, oder daß der Sand lose in den Formkasten eingefüllt und durch ein oben verjüngtes, von unten nach oben durch den Formkasten bewegtes Rohrmodell verdichtet und an die Wand gepreßt wird.So far, cast iron pipes have been produced in standing sand molds, which thereby be formed that in the molding box, the sand is tamped around the pipe model is, or that the sand is poured loosely into the molding box and through a tapered top, The pipe model moved from bottom to top through the molding box is compressed and pressed against the wall.

Von ι den Herstellungskosten machen neben den Materialkosten die Formerlöhne einen großen Teil aus.From ι the manufacturing costs account in addition to the material costs, the Formerlöhne a large part.

Bei der Erfindung handelt es sich um eineThe invention is one

Vorrichtung, durch welche die zur Herstellung von Maschinenguß bereits bekannten Lehmformen auch für die Erzeugung von Rohren hergestellt werden.Device through which the clay molds already known for the production of machine casting can also be used for the production of pipes.

Die Bildung der Lehmform für das zu gießende Rohr'geschieht, ähnlich wie dies bei der Herstellung von Sandformen und bei der Erzeugung von Zementrohren bereits bekannt ist, dadurch, daß man dem Rohrmodell eine nach oben verjüngte Form gibt und es zentrisch von unten nach oben durch den Formkasten bewegt, wodurch die eingebrachte Formmasse (im vorliegenden Fall Lehm) gegen die Formkastenwand gepreßt wird. Die anderen Eigenschaften des Lehms bedingen aber einerseits eine Aufrauhung der Formkastenwand zum Halten des Lehms, andererseits eine Belastung des Lehms, weil er sonst nicht genügend in den engen Zwischenraum fließen würde.The formation of the clay mold for the pipe to be poured happens in a similar way to that of already known in the manufacture of sand molds and in the manufacture of cement pipes is by giving the pipe model an upwardly tapered shape and it is centric moved from bottom to top through the molding box, whereby the introduced Molding compound (in the present case clay) is pressed against the molding box wall. The others On the one hand, however, the properties of the clay cause the molding box wall to be roughened to hold the clay, on the other hand a burden on the clay because otherwise it would not enough would flow into the narrow space.

In der Zeichnung stellt Fig. 1 einen Formkasten für Muffenrohre und Fig. 2 einen solchen für Flanschenrohre dar. Die Fig. 3, 4 und 5 zeigen Einzelheiten.In the drawing, FIG. 1 shows a molding box for socket pipes and FIG. 2 shows one for flanged pipes. Figs. 3, 4 and 5 show details.

b ist das Rohrmodell, welches hier besser als Schablonierteller bezeichnet wird. Seine zentrische Führung geschieht im allgemeinen durch eine in der Achse des Formkastens angebrachte Führungsstange c, welche unten und oben in Halslagern d und e gehalten wird. Es ist für die Wirkungsweise der Einrichtung gleichgültig, ob die Bewegung des Schabloniertellers, wie in der Zeichnung angedeutet, durch am Teller, mittels der Ösen f angreifende Zugmittel g von oben erfolgt oder ob die hebende Kraft auf den Teller durch irgend eine mechanische Vorrichtung von unten wirkt. b is the pipe model, which is better referred to here as the stencil plate. Its central guidance is generally done by a guide rod c mounted in the axis of the molding box, which is held at the top and bottom in neck bearings d and e . It is irrelevant for the operation of the device whether the movement of the stencil plate, as indicated in the drawing, takes place by pulling means g acting on the plate by means of the eyelets f from above, or whether the lifting force on the plate is effected by some mechanical device from below works.

Der Lehm wird nach geeigneter Aufbereitung auf dem Schablonierteller b in den Formkasten α eingebracht, fließt beim Hochziehen des Tellers nach dem Umfange ab und wird durch die Tellerkante an die Wand des Formkastens gestrichen.After suitable preparation, the clay is placed in the molding box α on the stencil plate b , flows off when the plate is pulled up and is brushed against the wall of the molding box through the edge of the plate.

Im allgemeinen reicht ein einmaliger Durchgang des Schabloniertellers nicht aus, sondern es ist eine Wiederholung nötig, indem die Form zuerst roh schabloniert (gewischt), dann vorgetrocknet, Hierauf genau geschlichtet und dann fertig getrocknet wird.In general, a single pass through the stencil plate is not enough, but a repetition is necessary by first stenciling (wiping) the form roughly, then pre-dried, then precisely sized and then dried completely.

Claims

Socket pipes are expediently poured with the socket facing up because of the easier removal of the cast pipe from the mold. The sleeve is made either by a special molding box placed on the smooth tubular shape or in the manner shown in FIG Sense is rotated. The shapes for flanged pipes are essentially stenciled in the same way (Fig. 2). The upper flange is produced in a specially attached molding box η. Form 0 is also specially set for the lower flange. So that the cast pipe can shrink, a removable intermediate piece j> is switched into the molding box in a known manner. An important point for the success of the clay mold is the correct adhesion and retention of the clay on the wall of the molding box. In order to achieve this, the wall must be artificially roughened with a kind of grating. This grating or roughening can be effected in various ways, for example by means of ribs or other projections h cast onto the molding box (FIGS. 1 and 2) or by special bars i (FIGS. 4 and 5) made of angle iron or other profile iron attached to the wall . This grating also has the purpose of preventing the clay from slipping through between the edge of the plate and the wall of the molding box when the stenciling plate b loaded with clay is let into the molding box a. When the plate goes down, a fraction of the clay remains over the protrusions of the grating and avoids the creation of cavities over the protrusions when it rises, i.e. when the shape is formed. For the success of the clay mold, it is also important for the clay to flow evenly against the wall of the molding box, which is generally achieved by the appropriate toughness of the clay and the conical shape of the stencil plate b. This process is supported by particular loads on the clay mass, e.g. B. by placing a ring-shaped weight "" (Fig. 1) .. In the case of flanged tubes, the shape must be destroyed after each casting because of the protruding flanges at both tube ends. Socket pipes can be pulled up out of the mold immediately after solidification as a result of the shrinkage, whereby the shape is retained if the clay is suitable and can be used repeatedly for casting after renewed blackening before it has to be completely renewed. Godfather nt-A ν Proverbs:

1. Device for the production of clay molds for cast socket and Flange pipes by stenciling by means of a centrally guided, tapered upwards Stenciling plate, characterized in that the molding box wall is roughened by projections which correspond to those of the cone-shaped stencil plate holding the draining clay, but the centric one Do not hinder the pulling through of this plate.

2. Embodiment of the device according to claim 1, characterized in that that an artificial load against the necessary pressure for the drainage of the clay mass causes the molding box wall.

1 sheet of drawings.