Dosing is the process of adding or removing substances determined in a prescription or unit at the specified rates. Dosages are divided into two as solid or liquid form. In terms of their measurement method, they can be examined in two types as volumetric and weight. In case of solid materials, weight dosing is in question. If liquid materials are involved volumetric dosing process is called.
What is Volumetric Dosing?
If solid, liquid and gaseous content is added to the raw material volumetric dosing aka volumetric dosing is called. It is the process of adding or removing a certain volume of raw material into the unit or recipe. Volumetric dosing without extreme precision injection process can be mentioned. Bulk density of raw materials inflation changes in such cases. In cases where the pouring density changes, it becomes mandatory to calibrate the dosing devices at all times.
What Does Bulk Density Mean?
in a certain volume extruder lines The weight of the raw material placed by means of it is called the bulk density. Although they are of the same variety, there may be differences in the densities of crushed, powder and granules. in granular form plastic broken with pet raw material bulk density plastic side equipment The raw material bulk density varies. Again, the densities of raw materials in solid and molten state are also different from each other. the melted plastic side equipment Its raw material has more density than powder, crushing and granule.
Bulk Density in Plastic Processing Machines
in machines plastic In case of processing, during the transition from solid form to molten form plastic side equipment It is essential that it is shaped so that there is no air in it. Because plastic into extruder lines of the air in the unit volume for the raw material entering through inflation must be excluded from the account. Determined raw material weight extruder lines It is necessary to calibrate again and again for each material that will pass through it.
Volumetric dosers inflation does not know the actual weight during Therefore also injection in how much volumetric dosing They don't even count what happened. In case of gravimetric dosages volumetric dosing Unlike the process, they eliminate the difference in bulk density. However, any raw material injection in the process and inflation It is a fact that there is no need for such finesse.
Volumetric Dosing Engine Selection
Due to the adjustment of the screw speed that adjusts the raw material, volumetric dosing Engine selection is very important. Precise operation between the lowest and highest speed is ideal for engine selection. Engine types are; They are diversified as dc, ac and stepper motors.
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