DK155691B - SOCKET MOLDING WITH AT LEAST A LOADED OR LOCKED CYLINDRICAL PAINTING ROOM - Google Patents

Description

DK 155691 B

BACKGROUND OF THE INVENTION 1. Field of the Invention

Such slag mills are known in which the cylindrical wall of the painting chamber is constituted by a screen through which a fraction of the painted material can be carried. This screen is regularly clogged and must therefore be periodically cleaned with a shutdown of the mower.

Furthermore, US Patent No. 3,214,105 discloses a slaughter mill, in which the painting chamber has a discharge opening for painted goods 10 in the side wall of the painting chamber and has projections in the form of adjustment plates and bearing carriers with deflection members near the side wall, which experience has an upper limit of approx. 1000 rpm for the rotor.

Such protrusions will inevitably impede the rotating flow of the milling material along the cylindrical wall of the milling chamber, and since said slag mill also has a fully closed bottom, at least moist or oily milling goods will quickly clog the mill's path of milling.

The slag mill according to the invention is characterized by the characterizing part of claim 1. As a result, the above-mentioned drawbacks are avoided, and a slaughter mill is provided which works with longer stroke life as well as low maintenance and repair costs, and which, in addition to being suitable for comminuting grinding materials, is generally also suitable for grinding oily grains and feedstuffs, which will often cause clogging of the sill or the mill's discharge opening for painting goods on traditional slaughter mills. The mill's air consumption can also be reduced to 10-15% of the normal value for similar, previously known mills.

30 This low air consumption also provides greater protection against dust explosion. Furthermore, much higher rotor speed can be operated.

2

DK 155691 B

One explanation for this may be that the missing projections, together with the fully open discharge bottom, whose cross-sectional area is at least as large as the bottom of the painting chamber or the lower painting chamber and remains unchanged or growing downward from the lower painting chamber, form a combination of measures which permit substantially higher rotor speed than the known mills, at most 3000 rpm, without the risk of clogging of chambers or outlets or obstruction of the movement of the slag around the projection-free cylindrical chamber wall. At grease content above 6%, the mill according to the invention works impeccably, while the known mills are clogged and are constantly stopped. Thus, a new principle of painting has been provided, whereby the relative velocity between slag and grinding material during the grinding is achieved by the interaction of a projection-free chamber-wall with slats rotating at high revolutions of 3,000-10,000 rpm, and this without the already painted cargo of Due to the completely open bottom, it can prevent the shipment of goods under paint.

The invention will be explained in more detail below in connection with one embodiment and with reference to the drawing, which shows a section of an axial section through a vertically positioned impactor according to the invention.

From a supply funnel in the upper left, grinding material is supplied to the slag mill, whose cylindrical wall 1 includes three interconnected and rotating rotors 2, 3 and 4 in the same direction. The slag mill is divided into three sections containing each rotor, and between the sections are conductor rings. 5 and 6 for the paint. The conduits guide the grind from the wall 1 radially inwardly and axially downward to a smaller diameter in the slag mill.

DK 155691 B

3 At the top of the mower mill are several circularly adjustable air supply openings or nozzles 8 for regulating suction or blower air to the mower. The suction air through the nozzles 8 can be adjusted to reduce or increase the material velocity in the axial direction through the mill to obtain optimum power consumption. Here, the axis 9 of the rotors 2, 3 and 4 and the axis 9 of the cylindrical chamber wall 1 coincide, but in cases where the common axis of the rotors is inclined, the axis 1 of the chamber wall 10 may be located higher than the common axis of the rotors parallel thereto. Each rotor is provided with a plurality of pulleys 12, which constitute the wear parts of the paddle mill, and are hingedly connected to respective rotors. Each rotor 2, 3, 4 with impeller 12 is disposed in its respective 15 sections or grinding chamber 16, 17 and 18 of the impactor.

The drawing shows the mill with three sections, but this section number can be increased or decreased to one. The mill preferably has variable speed and is suitable for computer controlled operation. The variable peripheral speed makes the mill 20 suitable for homogeneous milling, since the peripheral speed of the slag can be adjusted according to the nature of the milling material. For heterogeneous materials, the peripheral speed is set according to the most difficult to formulate goods. This applies whether the rotors rotate in the same direction or alternately rotate in opposite directions.

In cases where the paint is not oily or otherwise sticky, the chamber wall 1 of one or more lower painting chambers 17, 18 may be replaced by a perforated plate or screen, while the chamber wall of the upper chamber or chamber 30 is of solid plate.

Claims (1)

A slag mill for painting ordinary milling and / or moist materials, including vegetable grains for the production of flour or crushed grain particles, said mill comprising at least one vertical or inclined cylindrical grinding chamber, a rotor chambered in the chamber rotating in parallel. with the axis of the chamber, a plurality of pivots (12) pivotally mounted on the rotor, a grinding material supply opening located above the rotor, a grinding material discharge opening located below the rotor, the cylindrical chamber chamber wall (1) being substantially free of projections for obstruction of the rotating flow of the material along the wall of the chamber, and wherein the wall of the chamber is air impervious, characterized in that the discharge opening is constituted by an axially oriented and fully open bottom of the mower mill or the lower mill chamber, whose cross-sectional area is at least as large as that of the mill chamber. or the largest cross-sectional area of the lower painting chamber, and from which the discharge lines the downward direction with at least the same cross-sectional area leads away from the painting chamber or the lower painting chamber to divert the painted goods. Slag mill according to claim 1, characterized in that the discharge opening with downwardly increasing cross-sectional area leads away from the grinding chamber or the lower grinding chamber.