DE611515C - Press casting machine with ascending ram - Google Patents

Description

Press casting machine with ascending plunger They are press casting machines both with ascending, vertically from bottom to top or diagonally from bottom to top, as well as with a horizontally acting plunger and above the press cylinder arranged slider movable transversely to it became known, the slider in one position by means of a transverse opening provided in it, the loading of the Cylinder enables and in a different position during the actual press stroke than Abutment for the metal to be pressed is used. Through the filling opening of the slide ejection of the metal residue is also enabled.

The present invention now relates to such a press casting machine with an ascending plunger and arranged above the cylinder, transversely to him movable slide. According to the invention, one is in the slide during the actual Pneßvorganges the extension of the press cylinder forming recess attached, to which the metal outlet channel leading to the mold is connected, and in their Head an ejector for the metal residue is housed, which is automatic when moving the slide back into the filling position comes into action. The control the ejector, which in the rest position by a spring against the ceiling the recess is pressed when the slide is moved back into the filling position down through a guide bar.

In the known machines, the pressing residue must first be ejected happen and then the plunger causing the ejection to move back to to free the cylinder for filling the molding compound.

The ejection, retraction of the plunger and filling of the molding compound so happens one after the other.

In contrast, there is the advantage. of the present invention therein, that when moving the slide forming the cylinder closure into the ejection position on one side, the residue is ejected, while on the other side at the same time the filling of the exposed press cylinder can be started immediately can.

The invention thus allows' a faster and thus more economical Work.

Another advantage of the invention is that when moving of the slide in the ejection or filling position by ejecting the press residue the special = '. n foot butt piston takes place automatically.

The drawing illustrates an example embodiment with two figures, each in a vertical section through the essential parts.

Fig. I shows the position of the parts before or during the filling of the press cylinder. Fig. z the position of the parts after filling is complete, d. i. in readiness for the now beginning press stroke. The filling position according to Fig. I is also the position for ejecting the metal residue.

The plunger acting from bottom to top is denoted by a, which is driven, for example, by means of a hydraulic piston b coupled to it will. The movement back of the parts a, b into the initial position shown can be by the weight of these parts or by removing the ones under the power piston b Hydraulic fluid. With c the press cylinder is referred to, which is to be pressed has to absorb liquid metal and thereby completed below by the Preßkolbena will. above the press cylinder is movable transversely to it in a manner known per se a slide d attached, which in the starting position according to Fig. i the filling of the cylinder by means of a transverse opening arranged in it - made possible. The pressing of the metal into the form happens in the changed position of the slide d according to Fig.z, in which the slide by means of a recess f provided in it, to which the metal outlet channel g leading to the mold is connected, just above the cylinder c lies. The recess f continues upward into an opening h in which it can be moved a rod i rests, which carries a piston k below, which by a between the Slider d and an upper collar m of the rod supported springs usually after is held up. With o is an opening provided in the cylinder support plate p referred to, which extends down into a corresponding opening g of the machine support frame r continues and over which the slide d comes to rest with the recess /, if the slide is in the position shown in Fig. i. With s finally there is one to Control of the Stangei called certain guide bar.

After the cylinder c has been filled with a suitable amount of liquid metal in the starting position of the parts according to Fig. I, the slide d is brought into the position according to Fig. Z by any suitable control means. Now the plunger a is moved up to the slide rod or a track higher, the slide or piston k serving as an abutment for the metal to be pressed and this is pressed through the channel g into the mold. A solidifying metal residue remains in the recess f, ie in the part thereof lying under the piston k. Now the slide, if necessary after moving the plunger down again, is returned to the starting position according to Fig. I. The head m of the rod i finally hits against the guide bar s, which thereby automatically moves the rod i downwards, compressing the spring it, in such a way that the rigid metal residue standing under the piston k and entrained during the movement of the slide is pushed down through the Openings o, g is ejected. Then the slide is moved back to the position shown in Fig. I, and the pressing process can be repeated.

The metal residue could also be ejected without arranging the guide bar s or a similar automatic control device in such a way that the ejector i, k is driven down by means of a hammer or the like when the ejection position is reached; the ejector i, k can also be omitted entirely and the metal residue% can be ejected by hand.

As can be seen; the new design allows it to avoid that the rigid metal residue is set in the actual press cylinder c and the Plunger in the aforementioned disadvantageous manner as an ejection piston for the Metal residue must serve.

Claims (1)

PATENT CLAIMS: i. Press-casting machine with ascending plunger and slide above the press cylinder, movable transversely to it, which in one position enables the cylinder to be loaded by means of a transverse opening provided in it and in another position, during the actual bounce stroke, as an abutment for the metal to be pressed out serves, characterized by the arrangement of an extension of the press cylinder (c) forming during the pressing process, made in the slide (d) recess (f) to which a preferably perpendicular to the pressing direction, leading to the mold channel (g) is connected, and one housed in the head of the recess (f). Ejection device (m, i, k) for the metal residue, which automatically comes into operation when the slide (d) is moved back into the filling position. z. Press-casting machine according to claim i, characterized by the arrangement of a guide bar (s), by means of which the ejection device (m, i, k) is moved downwards when the slide is moved back into the filling position.