US2238584A - Wheel mounting for centrifugal casting machines - Google Patents

Description

April 15, 1941. F. FABER ETAL 2,238,584

WHEEL MOUNTING FOR CENTRIFUGAL CASTING MACHINES Filed June 3, 19:59

M m now 0 u E m m Es m M 0 0 /T 3 MZ .wmm fla latented Apr. 15, 1941- WHEEL MOUNTING FOR. CENTRIFUGAL CASTING MACHINES Ferdinand Faber, Amber: Oberpfalz, and Christian Ostermann, Gelsenklrchen, Germany, 'assignors to International 'De Lavaud Manufactux-ing Corporation, Limited, Jersey City, N. J.,

a corporation of Canada Application June 3, 1939, Serial No. 277,178 In Germany June 13, 1938 4 Claims.

This invention relates to centrifugal casting apparatus, particularly to apparatusof the type in which the mold is reciprocably mounted on wheels and the pouring trough is mounted in a fixed position. The object of this invention is the provision of an improved wheel mounting for such molds comprising wheels on each side of the longitudinal center of the mold the hearing surfaces of which are inclined in relation.

to the horizontal. The rails over which the wheels travel are so positioned that the treads or bearing surfaces thereof are inclined similarly to the inclination of the bearing surfaces of the wheels.

Heretofore, the centrifugal machine have been mounted upon wheels, the axes and bearing surfaces of which were in horizontal planes, and the wheels were guided on the rails by the usual projecting rims. Due to the clearance necessary for such wheels, the machines sway sideways during their travel over the rails causing the pouring trough to be displaced relative to the mold, and uneven casting-s to be formed. The objectionable results of such sidesway are particularly aggravated in the case of smalldiam' eter molds where the displacement of the mold causes the pipe to have uneven wall thickness. The wheel mounting of the invention eliminates the aforementioned swaying difficulties. In a construction andv arrangement of wheels and rails according to this invention, the wheels may travel over the rails without being guided by the rims. In order to insure rolling contact of the wheels on the rails without the frictional engagement of the rims, the wheel treads may be cyiindrically formed and a suitable angular bearing or tread :contact provided by inclining the wheel axles. The treadsof the wheels may also be frusto-conical and the wheels mounted upon horizontal axles. In either case, the bearing surfaces or treads of the wheels on both sides of the machine are inclined with respect to the horizontal and with respect to each other, and the bearing surfaces of the rails are similarly inclined and preferably to the same extent. In a particularly advantageous construction, the tread surfaces of the wheels are inclined at an angle of about 45 relative to the horizontal. This inclination is particularly favorable from a standpoint of power transmission because the wheels travel in rolling contact with a minimum of side friction. The wheels are preferably cylindrical and the axles inclined about 45 the inclination being such that the inclination of ill each axle is towards a vertical plane embracing the mold.

The accompanying drawing illustrates more or less diagrammatically apparatus embodying the invention, in which:

Fig. 1 is a cross-sectional view of a centrifugal casting machine; and

Fig. 2 is a front view partly in section of a modified form of wheel mounting.

, Fig. 1 illustrates the usual centrifugal casting machine comprising a housing I, a rotatable mold 2, and a pouring trough 3.- The casting machine is mounted upon any suitable number of wheels 4, preferably symmetrically disposed on each side of the longitudinal center of the machine. The wheels are mounted upon inclined axles 5 mounted in brackets .6 attached to the casting machine. The hearing or tread surfacesof' the wheels 1 are more or less cylindrical and the inclinations thereof are generally in the same directions as the axles. The bearing surfaces 8 of the rails are coincident with the bearing surfaces of the wheels. In this particular form of construction, the inclination of each wheel axle is about 45 from the horizontal. The axles are inclined towards the vertical plane embracing the mold center and the load forces of the casting machine are radial from the mold, and the machinemay travel along the rails with the wheels in perfect rolling contact without the rims 9 thereof :being in frictional engagement with the side edges of the rails.

In the apparatus illustrated in Fig. 2, the wheels Ill are frusto-conical and are mounted upon a horizontal axle i I which carries the casting machine on the brackets I2. In this form of apparatus, the rails l3 are preferably arranged similarly to those of Fig. 1, the bearing surfaces It thereof being inclined away from the horizontal and towards a plane embracing the mold center. The frustoconical surfaces of the wheels are such as to effect substantially uniform engagement'with the treads of the rails, the degree'of inclination of the wheel treads being similar to the inclination of the bearing surfaces of the rails.

his to be understood that the inclination of the bearing surfaces of the wheels, and the bearing surfaces of the rails, may be differently inclined as by changing the mounting on the left for the mounting on the right, in which case the direction of load thrusts would not be radial as in the apparatus illustrated, but would converge towardsa plane embracing the mold center. I

upon wheelsand rails arranged on opposite sides of the longitudinal center of the machine, the

improvement which comprises, tread surfaces for the wheels which are inclined from the horizontal and tread surfaces for the rails inclined similarly to the tread surfaces of the wheels.

3. A casting machine according to claim 2 in which the inclination of the wheel is about 45 with respect to the horizontal.

4. A casting machine according to claim 2 in which the inclination of the wheels on one side is opposite to the inclination of the wheels on the other side.

FERDINAND FABER.

CHRISTIAN OS'IERMANN

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