The discharge method and residual control of the Horizontal Ribbon Mixer have a vital impact on production efficiency, material utilization and product quality stability.
First of all, common discharge methods include bottom discharge and side discharge. Bottom discharge is a more traditional and widely used method. A discharge port is set at the bottom of the mixer, and the material is discharged by controlling the opening degree and time of the discharge door. This method has a relatively simple structure and smooth discharge, which is suitable for materials with good fluidity. However, for some materials with high viscosity or easy to agglomerate, blockage may occur at the discharge port, affecting the uniformity and thoroughness of the discharge. Side discharge is to open a discharge port on the side of the mixer, and use the rotation of the spiral ribbon to push the material to the side opening for discharge. This method is more suitable for some mixers with special shapes or difficulties in bottom discharge, which can reduce the accumulation of materials at the bottom to a certain extent, but the design and installation accuracy of the spiral ribbon are required to be high, otherwise it is easy to cause incomplete discharge.
Secondly, in order to control the residual amount, the internal structure design of the mixer is very important. Near the discharge port, the existence of dead corners and gaps should be minimized. For example, a streamlined transition design should be adopted to allow the material to flow to the discharge port more smoothly and avoid material residue in these parts. At the same time, the shape and arrangement of the spiral ribbon will also affect the residual amount. The end shape of the spiral ribbon should be reasonably designed so that it can effectively sweep the material to the discharge port and reduce the attachment of the material inside the mixer. In addition, auxiliary unloading devices such as vibrators or air purge devices can be installed inside the mixer. The vibrator loosens and falls off the material attached to the inner wall of the mixer and the spiral ribbon by generating vibration, which is convenient for unloading; the air purge device uses compressed air to blow the residual material to the discharge port, but it is necessary to control the intensity and direction of the airflow to avoid negatively affecting the mixing effect of the material.
Furthermore, the operating parameters of the unloading process also have a significant impact on the residual amount. The unloading speed should be reasonably adjusted according to the characteristics of the material. Too fast unloading speed may cause the material to remain at the discharge port before it can be completely discharged, while too slow will affect production efficiency. When the unloading is nearing the end, the speed of the screw belt can be appropriately reduced to allow the material to flow out more smoothly and reduce the material residue caused by the centrifugal force generated by the high-speed rotation of the screw belt. At the same time, for some materials that are easy to remain, multiple unloading methods can be used, that is, first perform a conventional unloading, then close the unloading port, make the screw belt reverse briefly, and push the remaining material to the unloading port again for secondary unloading, thereby effectively reducing the residue.
The selection of unloading methods and the control of residues of the Horizontal Ribbon Mixer need to comprehensively consider many factors such as material characteristics, mixer structure, unloading operation parameters, and the application of auxiliary devices. Only by optimizing these links can an efficient and low-residue unloading process be achieved, and the overall performance and production efficiency of the Horizontal Ribbon Mixer can be improved.
