SU1618597A1 - Tumbling barrel - Google Patents

Abstract

The invention relates to equipment for cleaning castings in a foundry and can be used for finishing. The purpose of the invention is to improve working conditions by sealing the discharging unit for cleaning waste when the angle of inclination of the drum changes under its operating conditions. The drum contains an elastic corrugated tubular casing .10 that connects the discharge opening of the bunker funnel 8 to the lid of the hermetic trans sport device 9. kszhu, 10 zypog.glen in a part of the goros: 1 s, t, f-ly, 3 il.

Description

Thebes 1

The invention relates to the field of production, in particular to the equipment for cleaning castings, and can be used for finishing processing,.

The purpose of the invention is to improve the working conditions by sealing the discharge unit of the cleaning waste by changing the angle of inclination of the drum under the conditions of its operation.

1 shows a tumbling drum, side view; in fig. 2 - elastic corrugated tubular casing in which the corrugations are made with different pitch and amplitude; on fig.Z - casing in which the corrugations are made with the same pitch and amplitude.

Galtovochny drum for cleaning castings consists of a working drum

with front casing 1 2 and rear 3 cones, respectively, for loading and unloading castings, support structures 4, frame 5, drum lifting mechanism 6, drum axle T T (slope), bunker funnel 8 for waste removal, conveyor 9 for waste disposal, sealing device 10, the sealing device 10 is equipped with flanges 1 on both sides and can be performed in different ways (figure 2 and 3).

The tool body, in which tumbling is carried out directly, has perforations in its cylindrical part and is installed inside the casing.

1. The casing consists of two parts - the lower and the upper and is equipped with a bunker funnel 8, rigidly fixed in the lower part of the casing and located between the lifting mechanism and the drum swing axis. The bunker funnel has the shape of an upturned versatile pyramid with a discharge hole of a rectangular shape, extended in the direction of the axis of the drum.

The conveyor 9 for waste disposal can be made in the form of a belt, plate, vibratory and other types of conveyor in a closed design. The receiving opening in the cover of the conveyor, for example vibrating, may also have the shape of a rectangle extended in the direction of the axis of the drum and be equal to the shape of the discharge opening of the bunker funnel 8.

The sealing device 10 is made of an elastic material

0

(rubber, polymeric materials, etc.) in the form of a tubular casing, the cross section of which is greater than the discharge opening of the bunker funnel 8.

The sealing device 10 (Figures 2 and 3) is made of different lengths along its forming in each two diametrically opposite points of the perimeter that are equidistant from the drum's swing axis, varying in proportion to its distance from this swing axis. The tubular casing is made corrugated in the transverse direction. In this case, the pitch and amplitude of the corrugation profile in each two diametrically opposite points of the perimeter equidistant from the swing axis increase in proportion to the distance from the swing axis 0 of the drum. As shown in figure 2

TO

R

-2- - k2v

s

but

0

five

0

five

0

five

with b Oh, ./

where t and t

(

- the corrugation profile pitch, respectively, in the perimeter points closest to the swing axis and furthest from it; and S - profile amplitude

the corrugation, respectively, to the nearest to the swing axis and the points of the perimeter farthest from it; a and b are the distances from the swing axis of the far and near points, respectively;

K3 - coefficients of proportionality,

The total length of the corrugated tubular casing varies in the same proportionality, namely K,

K |, K, k

where h

four-

one

h h

 five

b a

and h is the total length of the corrugated tubular casing in the vicinity of the drum swing axis and points farthest from it;

K and K - coefficients of proportionality.

The material for the shirred casing must be such that at an angle

5,161

the tilt of the drum is 0, provided the condition h h 1 without creasing bumps.

Another variant of a corrugated tubular sealing device with different lengths along the generatrix is depicted in FIG. Its corrugations are made with the same pitch and amplitude and are parallel to each other, but their number varies depending on the distance to the axis of swing of the drum.

The corrugated tubular casing has flanges 11 on both sides, which are attached on one side to the discharge hole of the bunker funnel, on the other side to structural elements, for example, to the cover of the conveyor 9 for waste disposal.

The cross section of the corrugated tubular casing should be larger than the discharge hole of the bunker funnel and located concentrically relative to it.

Tumbling drum works as follows.

Using the lifting mechanism 6, the tamping drum is set to an inclined position depending on the required; performance tumbling. Castings are loaded into the drum through the front loading cone 2, the tumbling drum passes, cleaned and discharged through the discharge cone 3. Tumble waste — molding sand, sand, metal dust, etc. — fall through the perforations of the cylindrical part of the drum and accumulate in the bunker funnel 8. A bunker funnel directs and forms a waste stream that flows through the tubular sealing-1 device onto the conveyor 9. The waste stream must be conditioned in such a way that its cross-section is smaller than the cross section. ribbed sealing element. Cleaning waste is removed by conveyor 9. To regulate the performance of the tumbling drum by

5976

Changing the speed of the passage of the flame through it changes the angle of the drum with the help of the lifting mechanism 6. The support structure 4 together with the drum rotates around a tilt axis 7 at a certain angle. In this case, the distance between the discharge hole of the bunker hopper and the receiving device of the conveyor 9 is changed. In addition, when the tumbling drum is in operation, vibrations of both the drum, its supporting structures, and the waste conveyor take place. the hole of the funnel and the conveyor hover within certain limits (200-300 mm).

Change in distance

0 is compensated by stretching or compressing the corrugated tubular sealing device. At the same time, sealing seizures and the nature of waste movement do not occur.

five

Claims (2)

1. Tumbling drum for cleaning castings mounted on a frame 0 with the possibility of changing the angle of inclination, containing a bunker funnel with a clearing waste collection hole, a transport device for their disposal, located under the loading, ,, with a cork hole of the Tunksrnoi funnel, - t l n h. 1 y sh and so that, in order to improve working conditions, the drum is equipped with an elastic corrugated tubular casing designed Q to connect the discharge hole of the bunker funnel with the lid of the sealed transport device, while the casing is filled as a part of the torok, having a cross-sectional shape ds the discharge hole of the hopper funnel. 2. A drum according to claim 1, characterized in that the pitch and amplitude of the casing corrugations are made with an increase of 50 in proportion to the distance from the axis of inclination of the drum. Yu about FIG. 2 /;