Multi-component mixer with exchangeable cartridge
BACKGROUND OF THE INVENTION 
     This invention relates to a multi-component mixer which is very easy to use owing to a simple, easily detachable and dispensable mixing cartridge. 
     Products having several components which change state as a result of a chemical process after they have been mixed are being used more and more in industry. In practice, it is necessary to have complex dosing and mixing equipment which is difficult to maintain and to clean, even using dangerous solvents, without loss of time in the course of product manufacture. 
     SUMMARY OF THE INVENTION 
     The present invention relates to a method of mixing several components by means of a contrivance having interchangeable elements of low cost which can be thrown away so that cleaning is avoided. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is a diagram of a whole dosage installation; 
     FIG. 2 is an example of a mixer having a cartridge which is quickly interchangeable. 
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The invention will be better understood from the description of the embodiment according to FIG. 1, showing an example of a general installation comprising several parts mounted in a frame or any other support (not shown). The different components are placed in the reservoirs 1 connected by the pipes 2 to dosing units 3, discharging the different components of the product through the outlet orifices 4 to the mixer tube 5. The tube 5 is fixed to the whole by the head 6 and the collar 7. 
     A circular motion, or a motion from left to right, or vice-versa, or any other motion, is imparted to the mixer tube 5 by mechanical means 8. The type of mechanical means is of no particular importance, and is thus not shown here. These means produce the displacements, preferably in the middle of said tube 5, without turning it. 
     FIG. 2 relates to the mixer tube 5 comprising said tube, which is flexible or semi-rigid, made of a material with little or no sensitivity to the product. Tube 5 is fitted onto the joining pieces 9 and 10 to which metal wires 11 can be fixed with the aim of perfecting the mixing, inside the mixer tube 5, of components introduced through the orifice 4 and passing through the tube to come out again through the orifice 12. 
     This arrangement of tube 5, with the joining pieces 9 and 10, forms the part which is detachable from the head 6 and the collar 7, and quickly replaceable as an exchangeable cartridge. After use, it is either thrown away as a unit or is partly recovered following cleaning. The length and the diameter of different tubes 5 can vary, depending upon product viscosity and dosed quantities.