MO'S CORNER: Part 5: Why do volumetric dosing units need calibrating?

摘要

Since volumetric dosing units do not weigh the output, they need to be calibrated for each material. The goal of calibration is to determine the mass of the material being dosed for a defined period of time at a defined number of revolutions of the dosing device (screw, disc etc.). This allows the control system to ensure precisely the right ratio of ingredients as required by the recipe. The system calculates the exact volume of each material required for each injection moulding machine cycle to achieve the desired output. For successfurcalibration, it is important to select anc correctly configure the right dosing device for the material and throughput. Only when dosing devices are operating within their upper and lower throughputlimits is the calibration value most accurate.