The dry mortar material that uses more on building material has two kinds: dry mortar and wall putty powder. Heat preservation mortar also belongs to the category of dry mortar; these materials are in the primary production method is to mix stir, such: Cement, drying sand, fly ash, cellulose, polystyrene particles are mixed evenly by a particular proportion, so how to choose dry mortar mixing machine in the dry mix mortar plant?
Vertical dry mortar mixing machine
Five years ago, there were many tile adhesive manufacturers from the point of view of reducing investment; most of the use is vertical dry mortar mixer, raw materials are artificially poured into the material box by screw conveyor to the mixing machine, and a variety of raw materials mixed. Still, this vertical dry mortar mixer has 3 apparent shortcomings:
1、Mixing uniformity is not good
Dry mix mortar requires high uniformity, the level of finished product uniformity will be directly the quality of the product; vertical mortar mixer in wall putty manufacturing machine uniformity is ok, but in the dry mortar production line due to cement, sand specific gravity difference is significant, easy to appear uneven mixing.
2、Residual amount is too large, resulting in non-uniformity between each batch of materials
The working principle of the vertical mixer is that the material is lifted from the bottom to the top by the high-speed rotation of the vertical screw and gradually mixed by diffusion after passing through the bulk plate. The high-speed process of the spiral makes the components with enormous gravity, such as sand and other materials, thrown away from the axis and can not participate in the mixing because of the high centrifugal force. On the other hand, the spiral side clearance is more significant; usually, 4-5 mm or even more extensive, and the vertical spiral side clearance reaches 10 mm, with substantial residues. Because the operation procedure is not accurate, the deposition of each batch of materials is not the same, directly affecting the content of various components in the next set of materials, resulting in unevenness between each collection of materials.
3、High maintenance rate
The bearings of the vertical dry mortar mixer are located at the upper and lower ends, and the more downward directions will contact the material, which is more likely to cause damage to the bearings. The bearings need to be replaced regularly, and the maintenance rate is very high.
Horizontal dry mortar mixer machine
A horizontal dry mortar mixer machine is the first choice; there are two kinds of dry mortar mixing machines: a horizontal double shaft paddle mixer and a screw ribbon mixer.
Ribbon screw mixer machine
Three screw belts, the body of the series, are cylindrical; the material is mixed in the cylinder body through the multi-layer screw belt, the multi-layer screw belt outer narrow screw width, and the direction of the adjacent two layers of screw belt for reverse design. In the process of material flow in the cylinder body, multiple material flows are formed, permeating each other, changing position, and mixing repeatedly. There is no accumulation block and dead Angle on the wall of the rolling mixing cylinder on both sides, which is the ideal choice for mixing.
Double shaft paddle mixing machine
In the pursuit of large output of the complete production line is widely used in the biaxial gravity paddle mixer; it is a faster mixing speed, good mixing quality, and a wide range of adaptation. A dry mix mortar production line is widely used in sizeable external insulation materials.
In the mixing time, the material is subjected to the action of two opposite rotating rotors and carries on the compound motion. Blade made of fabric, on the one hand, the slots along the machine arm counterclockwise, make the material turn around; on the one hand, the two rotor cross overlap into the floating zone, in the area, regardless of the shape, size and density of the material, can make the materials in a moment when the rise weightlessness, which makes the material in the machine groove Omni-directional cycle turning, staggered shear each other, To achieve the effect of even mixing.
How is the double shaft paddle mixer working?
Material particles in the machine under the blade, both circular motion and axial motion; According to the motion state of material mixing, there are convection mixing, shear mixing and diffusion mixing.
The material in two axial areas will flow along the axial direction. After reaching the axial end, the material will move to the other axial area by the action of a group of small Angle blades at the axial end so that the whole material forms a horizontal circular flow; On the other hand, the materials in the two axial areas will rotate around their respective axes at the same time, and each axial area forms a vertical plane and circulating materials; The material at the junction of the two axes also flows horizontally to the other axis. This multidirectional compound circulation convection will allow more materials to move and mix from one place to another faster.
the material under the action of the blade to form a shear surface, the material clumps or particles slide and collide with each other, creating shear mixing.
Diffusion mixed effect exists in the whole machine. Still, near the midline of the device within the region is more significant, two-rotor reverse synchronous rotation, due to inertia effect scattered in the air, scattered in the process, The fluid zone is formed near the centre line of the body by friction and infiltration of materials. Each particle can move freely in the fluidization region, and the material particles are fully diffused and mixed in the free movement. In this area, the friction is slight, the mixing is light and gentle, and there is no segregation. Especially when the particle material is in a flow state, the mixing effect of diffusion is better. The formation of the fluidization zone, combined with convective mixing and shear mixing, makes the mixing speed and uniformity of the biaxial blade mixer faster than that of a standard mixer.
How to choose a dry mortar mixing machine? In conclusion, from the perspective of mixing efficiency, the twin-shaft paddle mortar mixing machine is your first choice; it has a fast mixing speed, high uniformity of finished products, and is widely used. It is highly elastic in the dry mix mortar production line. From the perspective of budget cost, you can choose a ribbon screw mixer, which is of high quality and low price, and the speed and uniformity of mixing are also good. If you want to know more, please get in touch with us.