DE152556C

DE152556C -

Info

Publication number: DE152556C
Application number: DENDAT152556D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

- JVr 152556 KLASSE 31 c. - JVr 152556 CLASS 31 c.

zur Entfernung des Sandes.to remove the sand.

In großen und gut eingerichteten Gießereien werden die Formkästen an gewissen Stellen gefüllt, darauf durch Kräne nach anderen Orten geschafft, an welchen der Guß ausgeführt wird; darauf werden sie über Gruben in dem Boden des Gießhauses gebracht, in welche man den Sand fallen läßt, und aus denen er dann durch Förderbänder, Elevatoren o. dgl. in Behälter übergeführt oder auf demIn large and well-equipped foundries, the molding boxes are in certain places filled, then carried by cranes to other places where the casting was carried out will; then they are brought into pits in the floor of the foundry house which one lets the sand fall, and from which it is then carried by conveyor belts, elevators o. The like. Transferred to the container or on the

ίο Boden der Formerei aufgehäuft wird, so daß er von den Formern wieder von neuem benutzt werden kann; der Sand wird also in einem geschlossenen Kreislauf zu der Stelle zurückgeführt, an welcher er ursprünglich zur Herstellung der Formen entnommen war. Der beschriebene Arbeitsgang sichert sowohl hinsichtlich der Zeit als auch des Arbeitsaufwandes den wirtschaftlichen Betrieb in den Gießereien. Damit aber bei diesem Ar-ίο The floor of the molding shop is piled up so that it can be used again by the formers; so the sand is in in a closed cycle to the point at which it was originally was taken to make the molds. The process described secures both economic operation in terms of time and workload the foundries. But with this work

ao beitsgange die Formkästen immer von neuem ohne Zeitverlust benutzt werden können, ist es notwendig, daß der Sand aus denselben möglichst schnell entfernt wird, nachdem das Metall erstarrt und die Gußstücke herausgenommen worden sind.ao walkways the molding boxes can be used again and again without wasting time it is necessary that the sand is removed from them as quickly as possible after the Metal has solidified and the castings have been removed.

Der Erfinder hat gefunden, daß das vorteilhafteste und zweckmäßigste Verfahren zur Entfernung des Sandes aus der Form darin besteht, daß der Formkasten einer Reihe von aufeinander folgenden Stoßen oder Erschütterungen in vertikaler Richtung unterworfen wird. Derartige Erschütterungen werden zweckmäßig dadurch hervorgebracht, daß über der Mündung einer Grube, in welche der Sand aus den Formkästen eingebracht wer-The inventor has found that the most advantageous and convenient method for Removal of the sand from the mold consists in making the molding box a number of subjected to successive impacts or vibrations in the vertical direction will. Such vibrations are expediently brought about that over the mouth of a pit into which the sand from the molding boxes is introduced

den soll, Hebevorrichtungen angeordnet werden, welche die Formkästen periodisch zum Niederfallen auf feste Träger bringen, wobei durch die rasch aufeinander folgenden Stöße eine schnelle Entleerung der Formkästen in die darunter befindliche Grube erfolgt.the should, lifting devices are arranged, which the molding boxes periodically to Fall down on solid supports, with rapid successive shocks the molding boxes are quickly emptied into the pit below.

Einrichtungen, den Formkästen eine Rüttelbewegung zu erteilen, sind zwar an sich nicht neu, auch hat man schon vorgeschlagen, den Formkasten zwecks Entleerung auf eine feste Unterlage fallen zu lassen, doch läßt sich durch die bekannten Einrichtungen die Entleerung der Form nur langsam erreichen. Es unterscheidet sich der Gegenstand der Erfindung dadurch von diesen bekannten Einrichtungen, daß die Form auf gegenüberliegenden Seiten abwechselnd angehoben und wieder fallen gelassen wird, wodurch eine Beschleunigung der Entleerung bewirkt wird. Die dazu benötigten Hebevorrichtungen bestehen zweckmäßig aus parallel zu den festen, zur Aufnahme der Formkästen dienenden Trägern liegenden Schienen, welche vermittels Hängebolzen auf drehbaren Kurvenscheiben ruhen, so daß sie bei der Drehung der Kurvenscheiben eine von der Form derselben abhängige Hebung und Senkung erfahren.Devices to give the molding boxes a shaking movement are not in themselves new, it has also been suggested to move the molding box to a fixed position for emptying To drop the document, but can be emptied by the known facilities reach the shape slowly. It differs the subject of the invention characterized by these known devices that the mold is alternately lifted on opposite sides and again is dropped, causing the emptying to be accelerated. The to it Required lifting devices are expediently parallel to the fixed, for recording the molding boxes serving beams lying rails, which by means of hanging bolts rest on rotatable cam disks so that they are in the rotation of the cams experience an increase and decrease depending on the form of the same.

Eine der Erfindung gemäß ausgeführte Einrichtung ist auf der beiliegenden Zeichnung dargestellt, und zwar zeigt:A device embodied in accordance with the invention is shown in the accompanying drawing shown, namely shows:

Fig. ι einen Grundriß,Fig. Ι a plan,

Fig. 2 einen senkrechten Schnitt nach der \Jvd\ty-y der Fig. 1 undFig. 2 shows a vertical section according to the \ Jvd \ ty-y of Fig. 1 and

Claims

3 shows a vertical section along the line x-x in FIG. A means a pit that is connected at its bottom to a horizontal channel B through which the sand that has fallen into the pit is moved by means of a conveyor device. The pit A is sufficiently large to completely enclose a molding box ίο with its surrounding walls so that the entire contents of the latter can get into the pit. At suitable points the mouth of the pit is spanned by girders B1, which rest on girders B2, which are shifted in the walls of the pit which slide in guides C1 attached to the supports B2. Below the hanging bolts C are the horizontal shafts D, which carry thumb disks E, the boundary surface of which is composed of two semicircles of different diameters and a radially protruding shoulder e. The shafts D with the disks E are mounted so that the lower ends of the hanging bolts slide on the disks and are raised by the disks as the shafts D rotate until they suddenly fall down at the edge of the protruding shoulder pieces e and come with them support their lower ends again on the part of the disk E where it has the smallest diameter The s which the sand is to be removed is placed on the carrier Βλ and then lifted alternately on two opposite sides by the rails ΒΆ; when suddenly falling, the molding box falls on the girders i? 1, while the rails B3 move down to below the upper edge of the girders .B1. With the continued rotation of the shafts D, which are driven by a drive shaft D1 through the bevel gears Z) 2, the raising and sudden dropping of the flask is repeated as necessary. The fact that the cams are offset from one another so that the ends of the molding box are alternately lifted and falling down, the molding box receives not only a shock in the vertical direction, as in the known devices, but at the same time a certain lateral shaking movement, through which the loosening of the Sand and its removal is accelerated. It should also be mentioned that if the flasks are emptied by pounding and hammering against the walls or other parts, as has hitherto been customary, there is great wear. This disadvantage is completely avoided by the method forming the subject of the invention and the device described. Godfather NT-A ν Proverbs:

1. Device for dropping molding boxes on a solid base for Removal of the sand characterized by a moving device that has opposite sides or ends the flask alternately lifts and lets fall on solid support.

2. Embodiment of the device according to claim 1, characterized by parallel to the fixed, serving as a support carrier (B ¹ J running movable rails (B ³ J, which are equipped with hanging bolts (C) , which with their lower ends on of rotatable Support the thumb disks (E) carried by shafts (D) and alternately lift them up and bring them down.

1 sheet of drawings.