Patent GB-293226-A (GB)
Title: Improvements in or relating to apparatus for effecting the transmission of sand and similar materials
IPC: B65G31/00
Filed: 1927-08-30
Abstract: 293,226. Axmann, F. K. Aug. 30, 1927. Rotary projectors. - Apparatus for conveying sand or similar material and feeding it to a mouldbox or other place of delivery comprises two or more casings which are connected to each other in' such a manner that the direction of transmission can be varied, while each casing is fitted with means for effecting the projection of the sand &c. to the next casing or to the place of delivery. The casings are preferably provided with trunks or conduits connecting the outlet of one casing with the inlet of a succeeding casing and the outlets may be fitted with devices for regulating the area of the outlet orifice and adjusting the direction and density of the sand projected through the orifice. The guards or conduits may be adjustable in relation to the casings as well as relatively to each other. A stationary base, or a turntable or movable platform, or a vehicle may carry the casing at the place of supply, and preferably the casings are mounted on pivotal bearings, or ball- and-socket fittings attached to the guards or conduits, or on brackets, links, &c. Fixed or movable screens and magnetic devices for separating iron and steel particles from the sand may be employed in connection with the feed hoppers of the casings. As shown, Figs. 1 and 2, the sand is fed into a screening-box a fitted with a screen a<1> and passes by a hopper b into a casing c containing revolving blades d mounted on an arm d<1>, as described in Specification 293,225, driven by an electric motor e. A turntable g rotatable on a footstep g<1> carries an upright e<2> which supports the casing c and the bearings e<1> of the motor shaft. A lug a<3> on the box a contacts with a toothed wheel a<2> on the spindle f<1> of a magnetic roller f which separates particles of iron &c. from the sand. The sand is disintegrated by the impact of the blades d and projected into a curved guard h shaped to correspond with the path of the projected stream. The guard h directs the sand into the hopper j of the casing k of a second projecting-unit which is provided with a downwardly-disposed outlet k' to direct and pack the sand into a moulding-box 2. One or more hinged or flexible plates may be fitted in the outlet k<1> to adjust the outlet and direction of the projected sand. The hopper j, casing k, and motor l of the second unit are adjustably supported by a universal connection consisting of a ball m on the casing h and a socket head m<1> movable on the ball and connected with the casing k by a rod m<2> secured at one end to a bracket m<3> on the casing and mounted at the other end in the sleeve m<4> of an arm m<5> on the head m<1>. For vertically adjusting the packer head, the rod m<2> may be adjustable in the sleeve m<4>. In another arrangement, Figs. 3 and 4, each projecting-unit is movable in relation to the others and to the supply, which is contained in a truck n fitted with a delivery conduit o, magnetic separator f<2>, and shoot p for delivering the sand to the hopper b<1> of the first unit. A vertical shaft q mounted in brackets q<1> on the truck carries the hopper b<1>, casing c<1>, motor e<2>, and guard h<1> of the first unit. The guard h<1> delivers the sand to the hopper j<1> of the second unit, the revolving blades d<2> of which project the sand through a guard h<2> to the third unit or packer head which delivers the sand to and rams it in the moulding-box z. A, vertical shaft q<4> extending through the hopper j<1> is rotatably mounted in brackets q<3> on the guard h<1>. The third unit is carried on the second unit through the medium of a vertical shaft q<5> rotatable at one end in a sleeve q<6> on the guard h<2> and at the other end carrying a bracket q<7> embracing the motor l<2> which drives the blades in the casing k<3>. The guard h<2> delivers through a spout r on its outer end and a shoot s into the hopper j<2> of the casing k<3>. Adjusting- nuts q<8> may be provided for raising or lowering the shaft q<5> and the third unit. Instead of a truck n, the apparatus may be rotatably mounted on a turntable. The revolving impact-blades may be controlled by springs.