DE185667C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

-JVI 185667- CLASS 31 b. GROUP

undivided models.

Patented in the German Empire on December 16, 1905.

Most of the molding machines in use to date will Model plates used, d. H. Plates on which the divided or undivided to be formed Models attached or with which they are made in one piece. The production Such plates are costly and time consuming and cannot be passed through the former be done by yourself, but it requires specially trained forces. A Changing the models is in most cases impossible or at least cumbersome and time consuming. It is precisely the latter circumstance that has resulted in commercial foundries where many small parts are manufactured also in malleable foundries, in key and lock production and the like. Shaping according to model plates and the molding machines have not yet found acceptance because of the diversity the number of casts required by a model an exchange almost daily and Recomposition of the models on the model plates is necessary.

In order to give every shaper the opportunity to use the Assemble models as required and manufacture the shapes on a machine can, the following process is recommended, which forms the subject of the invention.

The worker first stamps on a molding box and knocks the models out one piece must exist up to the dividing line in the sand so that the models lying half in the sand and half protruding. This box I with the so embedded Instead of a model plate, he brings models into a machine, which will be described in more detail below. For the time being, only the general work process should be mentioned (see Figs. 4 to 12). on This molding box, which is now used as a pattern plate, is placed by the moulder with another molding box II, fill this with sand and press it (Fig. 4). So that no sticking together of the two sand areas takes place, the plane of separation is previously made with a thin one Layer of coal dust interspersed. After box II is pressed, both Box I and II clamped together and turned so that box I now comes up (Fig. 5); Box II is lowered, with Box I on four pegs touches down (Fig. 6), while the models because of their weight sit in box II stay. After box. I is removed, box II serves as a model plate. on a box III is set (Fig. 7), pressed in the same way, turned over (Fig. 8) and lowered so that the models are in box III (Fig. 9). This is on put a box IV in box III and repeat the same game (Fig. 10, 11 and 12), until the models are in Box IV and

Claims (3)

Box III can be removed and so on. In this way you can work continuously by moving the models from one box half to the other.
The machine shown in FIGS. Ί and 2 is used to carry out this process. It consists of a base plate 1 which carries a press beam 2 with an extendable counter press plate 4 through four columns 3. The press cylinder 5, in which the piston 6 moves with the press plate 7, is fastened to the plate 1. The raising and lowering of the piston is effected and regulated by a controller 15. Arms in which the four pins 8 are screwed are attached to the press cylinder. Furthermore, a lever 9 is hinged to the cylinder 5, which prevents the pressure plate 7 from sinking by itself if water should be lost due to any leaks. On the base plate 1, two guide posts IO are also attached, in which two racks 11 move; they are accommodated by two in protective housings 12 Gears (not shown) moved on a common shaft 13 sit; the latter can be rotated by lever 14. The racks carry bearings 16 for the pin 17; the latter each carry two oppositely directed Pins 18 (see also FIG. 3), over which plates 19 and 20 are slipped and by means of plug-in wedges be attached. The way in which the plates 19 and 20 are fastened is here only for example, suppose they can of course just as well by clamping screws or some another facility can be accomplished. Likewise, the lifting and lowering of the rods 11 can also be replaced by eccentrics by gears or by lever action be effected immediately. : The way of working is as follows: A plate or a board 19 is attached to the pins 18 in the manner described, then the piston 6 with the pressure plate 7 can go so high that the latter rests against the board 19; then it is determined by lever 9. Box I, which was tamped on by hand and in which half of the models are embedded, is now placed on the board 19. Box II is placed on this box, provided with a filling frame 21 (FIG. 1) necessary for the task of sand, and pressed by pulling the counterpressure plate 4 forward and applying pressure again under the piston. When the pressure is released, the piston sinks until it is held again by the lever 9. The Gegenpreßplatte 4 is then moved back, taken from the filling frame 21 and placed a plate or board 20 to the box II and fixed by Vorsteckkeile (see F'G x 3) · I ^st this is done, one raises the so clamped together box by folding of lever 14 and rotates it by 180 ° so that box II comes down and box I comes up. Then you remove the wedges that hold the now also below board 20, press the lever 9 to the side, whereupon the piston 6 and plate 7 and with them the two boxes continue to sink, until due to the peculiar position of the lifting pins 8 and them Corresponding approaches to the molding box, the box at the top with its lugs hits the pins 8 and remains there, while the box below and with it the models continue to follow the movement of the piston. The box that remained on the pins is then removed, the piston 6 is allowed to rise again and is determined by the lever 9, whereupon a new box is placed and the game just described is repeated. The four pins 8 do not form a rectangle, but a trapezoid (see FIGS. 13 and 14). The flaps 22 of the molding box are accordingly attached so that they just fit on the four pins when the box is on top (FIG. 13), but pass the pins when the box is rotated. In this way it is achieved that when the piston is lowered, only the upper box can always sit on the pins, while the lower box can follow the movement of the piston. It is not necessary that the pins form a straight trapezoid; they can also be arranged in the form of an oblique parallelogram or a triangle or in such a way that they are not symmetrical to the center line from (FIG. 13) of the pivot pin 17. It is also not necessary that straight pins serve as a support, but there can be any other fixed support points can be arranged in this way. The boxes can of course just as easily be pressed by fluid pressure or air pressure as done by lever pressing by hand. In Figs. 1 and 2 is only an example a hydraulic machine is shown. Godfather NT-A ν Proverbs: i. Process for simultaneous molding with several loose undivided models, characterized in that in continuous operation over the in a box or frame up to the dividing plane models embedded in the box halves, a second box or frame is filled with molding sand and pressed, these two boxes or frames are then clamped together and turned, then the first box was lifted off and now on top of it now containing the models Box again another third box shaped in the same way will. 2. Machine for the production of molds according to the method according to claim i, characterized in that vertically displaceable to a horizontal Axis rotatable pins (17) each carry two oppositely directed pins (18) for receiving the plates connecting the pins (19, 20), which the between Hold them together molding box for the purpose of common turning, but alternately when pressing the molding sand can be removed. 3. Machine according to claim 2, characterized in that the molding box with corresponding flaps in one position for the purpose of separating them on fixed, asymmetrical to the axis of rotation of the molding box Put on support points or pins (8) while these tabs are fixed to them when turning the box Passing points. 1 sheet of drawings.