A powder mixer is used to refine materials and usually plays a significant role in the value-added chain. But it is only one link in the process chain. The more information is known in connection with dosing, mixing, discharging and the degree of emptying, the better the interaction of the entire plant can be optimized.
Simple load cells can reliably weigh large masses. This also applies when the masses are blended in the mixer. Weighing data is provided in analog or digital form. However, within a plant system, more is needed. The measurement data must be interpreted in process automation. amixon® discusses just one detail in this context that is frequently questioned by customers.
Answer from amixon®: The amixon® mixer shown on the right rests on four load cells. The component depicted in blue shows the mounting plate and the bending beam of such a load cell. In its round recess, strain gauges are mounted (hidden for us). Depending on the load, the beam deforms elastically. If the strain gauges stretch, the electrical resistance increases; if they compress, the electrical resistance decreases. Digital load cells have integrated evaluation electronics that measure the current flow and output it as a digital signal. The load is applied via a sphere. This ensures that only vertical loads are measured.
In the present case
The display then shows a very accurate value when the mixing tool is stationary. With the aid of electronic attenuation, a reasonably accurate value can be displayed even when the mixing tool is rotating.
Before the weighing function is put into operation, the scale must be parameterized with the display electronics. For this purpose, it is necessary to load or fill the mixer symmetrically with a precisely defined minimum load. The electronic signal generated in this way is used to tare the scale.
Answer from amixon®: In principle, this is possible if
the flow suitability of the mixing goods allows it and if the discharge fitting
of the mixer is suitable for this. If
you would like to find out more about “Container filling or big bag filling
directly from the mixer”, please also read our article on our new development DosiFlap®.