DE7704865U1 - DEVICE FOR TREATMENT OF MATERIALS BY MEANS OF A ROTATING DRUM - Google Patents

Description

Dipl.-Ing. H. MITSCHERLICH ': i 11-8000 M D N CH EN 22

Dipl.-Ing K. GUNSCHMANN "'Steinsdorfstrasse 10

D, .......,. V /. KÖRBER, 7. pibS!,; "?;

Dipl.-Ing. J. SCHMIDT-EVERS

PATENTANWÄLTE L — f '

Expert N.V. '

Willemstad , Curacao / Netherlands Antilles Handelskade 24

Utility model registration

Device for the treatment of materials by means of a rotatably driven drum

The innovation "relates to a device for treatment solid and / or liquid materials, especially for cooling and drying molding sand and for cooling Castings, by means of a lying drum rotatably driven by an anti-friction element, the drum on one end has a round central inlet opening and at the other end an outlet, which inlet opening has a considerably smaller diameter than the drum shell,

In the case of drums with a large diameter, the gear rings attached to the drum circumference are used to drive the Drum expensive.

! The innovation creates a ^ less expensive device of the type mentioned above that the drive element at the insertion end of the drum around the attacks round, central import mouth.

If the passage of at least the central part of the drum decreases in the direction of the discharge, the drum becomes preferable Driven by two ring gears, which have essentially the same diameter, which is considerable is smaller than the largest diameter of the drum shell, where oiner of the ring gears near the import mouth and the another ring gear near the discharge is attached around the drum circumference.

7704865 06/23/77

The innovation is shown below on the basis of a drawing

explained in more detail. ^

In the drawing show schematically:

Figures 1 and 2 each a view of a different device according to the innovation,

Figure 3 is a view in the direction of arrow III in Figure 1, and

FIG. 4 shows a view in the direction of the arrows IV in FIG.

The devices of Figures 1 to 4 each contain an elongated drum 1 with an insertion end 2 and a Discharge end 3. This drum 1 can, for example, be used for cooling, drying, mixing, sorting or for other types of treatment of solid and / or liquid materials, but especially for cooling and drying of Molding sand and for cooling castings. Depending on Intended use, additional precautions can be taken, e.g. perforation of the wall, internal burner, Inner nozzles, inner guide vanes, air suction means and the like., But since the innovation is essentially the type of As regards the suspension and the drive of the drum, such additions are not shown.

The drum 1 is located above a recessed part 4 of a foundation 5 and is in the lying position by means of Rollers 75 supported.

The jacket 78 of the rotatably mounted drum 1 of Figures 1 and 2 has a large diameter c [of, for example, 2 to 3 Meters up. The drum 1 has a round, central inlet opening 76 at its inlet end and at its outlet end a discharge 77. The import mouth 76 has a diameter

7704865 23.oa77

t_ of, for example, 1 meter, which is thus considerably smaller than the diameter cj of the central part of the drum 1. According to the innovation ^ _y t attached to the round, central entry orifice 76, a ring gear 68 which may thanks to the arrangement of the import orifice 76 has a small diameter verh'ältnismässig h. A drive element driven by a motor 79, which is formed by a gear wheel 80, acts on the ring gear 68. With this type of drive, a large, expensive toothed ring is avoided, which would be required when driving the drum 1 with a toothed ring surrounding the jacket 78. If the ring gear 68 works together with a chain, there is also the advantage that a short chain can suffice.

The device according to FIGS. 3 and 4 contains a lying drum 1 mounted on rollers 75, the two Wears ring gears 84 and 81 on the circumference, which have almost the same diameter e. The diameter e is considerable smaller than the largest diameter w of the drum shell 78, the passage of which from the central part in the direction of the Discharge 77 decreases. One ring gear 84 is near the inlet port 76 and the other ring gear 81 is near the outlet 77 of the drum circumference attached. This device has the advantage that the ring gears 84 and 81 as a result of their being the same Shape and its relatively small diameter can be produced at a moderate cost price, while the drive of the drum 1 by means of the two gears 82 driven by a common motor 83 prevents the skew the drum 1 prevented with certainty.

7704865 06/23/77

Claims (2)

PROTECTION CLAIMS 1. Device for the treatment of solid and / or liquid materials, in particular for cooling and drying molding sand and for cooling castings, by means of a lying drum rotatably driven by a drive element, the drum having a round central inlet opening at one end and a round central inlet opening at its at the end has a discharge, which inlet opening has a considerably smaller diameter than the drum shell, characterized in that the drive element engages at the inlet end of the drum (1) around the round, central inlet opening (76). 2. Device according to claim 1, wherein the passage of at least the central part of the drum decreases in the direction of the discharge, characterized in that the drum (1) is driven via two toothed rims (84, 81) which have substantially the same diameter (e) which is considerably smaller than the largest diameter (w) of the drum shell (78), with one of the gear rims (84) near the inlet opening (76) and the other gear ring (81) near the discharge (77) around the Drum circumference is attached. The patent attorney 7704865 06/23/77