DE43497C

DE43497C - Forming machine with rammers moving independently of each other

Info

Publication number: DE43497C
Application number: DENDAT43497D
Authority: DE
Original assignee: M. R. MOORE in Indianopolis, Indiana, V. St. A., Nr. 450 Bellefontaine Street
Publication date: 1901-07-26
Also published as: DE42009C

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Neuerung an der unter No. 42009 patentirten Formmaschine mit unabhängig von einander bewegten Stampfern besteht darin, dafs an Stelle der einzeln in getrennten Gehäusen durch den Druck eines Mediums mittelst Treibkolben vorbewegten Stampfer eine Anzahl ausgebildeter Stampfer zusammen in einem gemeinsamen Gehäuse durch den Druck eines Mediums vorbewegt werden.The innovation on the under No. 42009 patented molding machine with independent of tamper moving with each other consists in the fact that instead of the individually in separate housings through the pressure of a medium by means of propulsion pistons advanced rammers a number of trained rammers together in a common housing can be advanced by the pressure of a medium.

Fig. ι und 2 zeigen diese Modification unter Anwendung von Flüssigkeitsdruck.Fig. Ι and 2 show this modification using liquid pressure.

Die Stampfer D sind von solcher Gröfse, Form und Anzahl, dafs sie in ihrer Gesammtheit das Innere von A mit solcher Genauigkeit ausfüllen, dafs sie mit einander einen wasserdichten Verschlufs bilden, jedoch im Stande sind, sich frei und leicht an einander vorbei zu bewegen. Sie sind hohl, aus Metall oder sonst geeignetem Material und innen mit Federn E armirt. Das Innere des Kastens A ist mit einer Vertiefung zur Aufnahme der Packung C ausgestattet, welche durch Rahmen B an ihrem Platz gehalten und welch letzterer durch Bolzen oder Schrauben an A befestigt wird:The pounders D are of such size, shape, and number that in their entirety they fill the interior of A with such accuracy that they form a watertight seal with one another, but are able to move freely and easily past one another. They are hollow, armirt of metal or other suitable material and lined with feathers E. The inside of the box A is provided with a recess for receiving the package C, which is held in place by frame B and which the latter is fastened to A by bolts or screws:

Mittelst kleiner Löcher C^l kann Flüssigkeit aus dem Innern des Kastens nach der Aufsenseite der Vertiefung hinter die Packung gelangen, so dafs letztere bei eintretendem Druck durch diese Flüssigkeit nach innen gegen die Stampfer geprefst und damit in Berührung gehalten wird.Means small holes C ^l may be liquid from the interior of the box according to the supervisor side of the recess get behind the pack, the latter is at eintretendem pressure geprefst by this liquid inwardly against the tamper and thus kept in contact DAF.

Jede Feder E stützt sich gegen eine Scheibe e\ welche von einem Bolzen oder einer Stange e² getragen wird und sich durch die Mutter d², wie durch den Kastendeckel A erstreckt, wo sie mit einer Mutter e³ versehen ist. Vermittelst dieser Schraubenmuttern e³ werden die Stangen e² angezogen und den Federn eine geeignete Spannung zum Gegendrücken gegen die Köpfe d² der Stampfer ertheilt, so dafs die Stampfer nach oben gegen den Kastendeckel gedrückt bezw., wenn in Wirksamkeit gewesen, in ihre Anfangslage zurückgeschnellt werden. Unter jeder Schraubenmutter e³ ist eine Packung angebracht, welche das Lecken rund um die Stäbe durch die Löcher von A verhütet. In der Deckplatte ist eine mit Schraubengewinde versehene Oeffnung a² angebracht, durch welche Flüssigkeit unter Druck zugeführt und der Abflufs derselben ermöglicht wird. Zu- und Abflufs werden durch eine auf der Zeichnung nicht dargestellte geeignete Absperrvorrichtung regulirt. Die unter Druck durch α² zugelassene Flüssigkeit preist auf die Köpfe der Stampfer, überwindet die Spannung der Federn, drückt die Stampfer hernieder gegen den Sand und comprimirt und preist denselben auf und um das in dem Formkasten abzuformende Modell. Jeder Stampfer wird so weit heruntergehen, bis der hauptsächlich von der Dichtigkeit des Sandes herrührende gröfsere Widerstand dem wirkenden Druck gleich geworden ist, wonachEach spring E is supported against a washer e \ which is carried by a bolt or rod e ² and extends through the nut d ² , as through the box cover A , where it is provided with a nut e ³ . By means of these nuts e ³ , the rods e ^{2 are} tightened and the springs are given a suitable tension to counter-press against the heads d ^{2 of} the tamper, so that the tamper is pressed up against the box lid or, if it has been in effect, snapped back into its initial position will. A packing is attached under each nut e ^{3 to} prevent leakage around the rods through the A holes. In the cover plate is provided with a screw thread opening a ² , through which liquid is supplied under pressure and the drainage of the same is made possible. Inflow and outflow are regulated by a suitable shut-off device, not shown in the drawing. The liquid admitted under pressure by α ² presses on the heads of the rammers, overcomes the tension of the springs, presses the rammers down against the sand and compresses and presses the same on and around the model to be molded in the molding box. Each tamper will go down until the greater resistance, mainly due to the tightness of the sand, has become equal to the pressure acting, after which

Claims

the movement of the tamper and further compaction of the sand ceases. the The effect can be made variable by adding larger feathers to individual feathers Gives tension than others. After the liquid has been drained, the springs pull the rammers back and the molding box can be removed.

A second innovation consists in the fact that in place of the independently of each other through Dead weight acting tamper a number arranged in a common housing Tamper is loaded by springs, the compression of the sand layers by means of their tension occurs when, by any means, the tamper group is advanced against the sand or the sand is advanced against the tamper group will. The springs allow the tamper to give in or to pull back under the pressure until the same can be regulated The tension of the springs has become the same.

The tampers C mounted in the housing A are of such a size and shape that they exactly fill the opening of the box. The drawing shows the same with a square cross-section, but they can also be designed on three or more sides, depending on whether these shapes are more suitable for the circumstances. They can be made of any suitable material; however, it is advisable to make them out of metal and hollow and to provide them with rubber buffers d .

Each tamper has a screw-threaded pin e with a nut f , which goes through a hollow bolt g screwed into the box-shaped frame A.

Spiral springs h are arranged around these pins e , the ends of which bump against the tamper C on the one hand and against a disk h ^l held by the bolts g on the other hand. The tension of the springs h is adjusted by these bolts g and the stud nuts f.

G instead of the adjustment screws can also contain two or more screws g ^l as shown in FIG. 5, be located.

The effectiveness of this deck box can easily be seen from FIG.

A sandpit J is attached above a molding box, which contains a model K resting on the movable table L , and the deck box A above it. The latter is connected by strong rods M to a plate N , of which a toggle mechanism O presses against the table L and thereby against the deck box A. This force can also be used in other ways, e.g. B. by means of liquid pressure generated.

As soon as the rammers press on the sand, it does not matter whether the deck box is against the table to or the latter moves towards the deck box, the sand is compressed so long until the resistance to further pressing is equal to the tension of the springs. As soon as the sand gets into this state is, every pounder gives in; there is no further compression there. It follows that the degree of compression by means of that provided for the springs Adjustment can be regulated, and that the whole surface of the molding box is completely one is subject to controllable pressure, regardless of the difference in strength the sand layers and the shape of the model, as well as regardless of the extent of the Movement and the intensity of the force by which the pressure is produced.

Patenτ claim:

In the case of patent no. 42009 marked molding machine:

a) the replacement of the rammers, which can be individually moved forward by the pressure of a medium against the driving piston (M), with rammers (D) which are designed as pistons and which are arranged close together in a common housing in which they are jointly loaded or advanced by the pressure of a medium which tampers can be provided with adjustable springs (E) for the purpose of dividing a variable counter pressure against the pressure of the medium, or

b) the replacement of the rammers acting by their own weight with rammers (C, Fig. 3 and 4), which are arranged close together in a common housing and are loaded by means of adjustable springs (h) , due to their tension when the tamper group moves against each other and the molding box, the sand layers are compacted until the resistance of the compacted sand layers under each tamper has become equal to the stressing spring tension, the adjustment of the springs being effected by hollow screws g or screws g / Fig. 5, in connection with the arrangement of a pressure plate L (Fig. 3), by means of which the molding boxes are pushed forward against the tamper.