Metal founding – Means to shape metallic material – Plural independent molds
Patent
1988-05-23
1989-07-11
Seidel, Richard K.
Metal founding
Means to shape metallic material
Plural independent molds
164324, 19880301, B22D 3302
Patent
active
048462519
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for the transportation of horizontally split, boxless sand casting molds for foundry purposes from a molding station via a casting station to the knocking-out point by means of a series of transport plates which are guided one against the other along a track and whose length in each case, in the direction of transport, is equal to or only a little larger than the corresponding length of the casting mold placed on it in each case, and against which a drive engages.
An apparatus of this type is known (German Auslegeschrift No. 2,417,197), in which the supporting surfaces of the transport plates for the casting molds are not only of flat design, but also unlimited on all sides in such a way that, in the event of possible jolts, ie. sudden accelerations or decelerations, the casting molds on the transport plates can shift on the transport plates. Such an offset may impair not only the casting mold concerned itself, but also the neighboring casting mold against which it collides. Furthermore, a cast mold has the tendency to swell, ie. it expands under the effect of the casting, and can thus likewise impair adjoining casting molds, in particular those which have not yet been cast, since these themselves do not swell and can therefore easily be dented. Finally, problems may also arise in transferring the casting molds from one transport line to another transport line by once again an offset occurring or mold sand crumbling from the faces of a casting mold.
With respect to the problem of the swelling of a casting in a boxless casting mold, it should be mentioned that although attempts are made to avoid casting parts having different casting weights in one and the same series of successive sand casting molds, since in this case the swelling behavior likewise tends to be different according to the different casting weights, in such a way that a sand casting mold cast with a larger casting weight of course swells more, this cannot of course always be avoided.
The object underlying the invention is seen as creating an apparatus of the type specified at the start, in which no offset of the sand casting molds with respect to the transport plates can occur any longer and a swelling of the sand casting molds after casting cannot result in the possibility of neighboring sand casting molds, whether already cast or still empty, being touched or even impaired or damaged.
This object is achieved in the case of an apparatus of the type mentioned in that each transport plate has at least at one to its ends a face strip arranged substantially vertical to it and directed upward.
This face strip delimits the position of each new sand casting mold brought onto a transport plate from a molding station in the molding machine with respect to the preceding sand casting mold, namely by the face strip being arranged between the two molds. Sudden accelerations or decelerations can thus not lead to displacements or an offset of the sand casting molds on the associated transport plates. If it is desired, furthermore, to prevent particularly reliably that for instance the upper half of the sand casing mold, thus the half above the mold parting or separating line, is displaced or offset with respect to the lower half of the sand casting mold, it is advantageous to design the face strip as a face wall which has a height covering the parting line of the sand casting mold. The height of this face wall can be appropriately equal to the height of the sand casting mold. In any case, a touching of successive or neighboring sand casting molds owing to the swelling process of cast molds is prevented since, according to the invention, a face strip or face wall is always arranged between two successive sand casting molds. In this arrangement, the face strip is preferably arranged at the end of the transport plate facing away from the molding station in such a way that the respective sand casting molds delivered by the molding machine can be simply pushed in the direction of transport onto the transport plate.
Since i
REFERENCES:
patent: 3343591 (1967-09-01), Lorang
patent: 4582193 (1986-04-01), Larsson
Burton Ralph M.
Seidel Richard K.
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