Operation steps of automatic
Melt flow index tester The automatic Melt Flow Index Tester is used to measure the MFR value of various plastics and resins passing through a certain temperature and load in the viscous flow state and passing through the standard die every 10 minutes. It is suitable for engineering plastics such as polycarbonate, polysulfone and nylon with high melting temperature, as well as polyethylene (PE), polystyrene (PS), polypropylene (PP), ABS resin and Polyoxymethylene (POM) , polycarbonate (PC) resin and other plastics with low melting temperature.
The automatic Melt Flow Index Tester adopts the method of automatic sampling and balance weighing, and then calculates the volume flow rate according to the formula. The measurement results are displayed on the LCD screen of the Melt Flow Index Tester instrument and output by the micro printer. The Melt Flow Index Tester instrument has accurate measurement data and simple operation. The specific steps are as follows:
1. Turn on the power supply, set the temperature, sample cutting time interval and cutting times, wait for temperature rise, and ensure that the constant temperature of the barrel is greater than 15 minutes before testing the sample;
2. Weigh 3-8g of sample according to the pre calculated flow rate;
3. Prepare gauze, tweezers, rags and die cleaning rod;
4. After the temperature is constant, put the weighed sample into the barrel with a funnel, and hold the piston to compact the sample. This process is completed within 1 minute.
5. After waiting for four minutes, the temperature shall return to the selected temperature, and the selected load shall be added to the piston at this time; The piston descends under the action of gravity until the thin strip without bubbles is extruded;
6. Pre cut and start timing, automatically cut according to the set time interval, and the length of each cutting section is 10-20mm;
7. After cutting, press out the die and surplus material quickly, clean the die quickly while it is hot, and clean the inner chamber of the barrel with gauze;
8. After the section is cooled, pay attention to weighing, accurate to 1mg, and calculate the average mass.
