5 Easy Steps to Operate Presto MFI Tester

The MFI tester or Melt flow index tester is the best testing instrument offered by Presto that helps you in measuring the resistance to flow of polymers when they melt at a specific temperature. We all know that plastics are widely used in various industries and measuring the melt flow rate of these plastics will help you determine their quality. The Melt Flow Index is a major property of plastics that determines the physical as well as chemical properties of these materials. The Presto’s Melt flow index tester is an advanced testing machine that is very helpful in accurate analysis of the Melt Flow Index of plastic granules of different types of plastics. The deluxe model of this testing instrument from Presto will be provided with amazing features and technical specifications so that you can perform the test with the highest accuracy. Here, we are going to discuss the features, specifications, and working of this testing instrument.

Introduction about Presto MFI Tester-Deluxe model

We all know that polymers play a vital role in our daily life. Thus, measuring the resistance to the flow of these materials is a necessity to determine their quality. Therefore, the MFI tester from Presto comes into existence to make sure you will get highly accurate testing results. This amazing testing instrument from Presto comes with a PID controller that is best for controlling the temperature inside the chamber with high accuracy. There is a timer provided with the machine which can be used for setting the testing time up to 999 hours. Its stainless steel inner body with a corrosion resistance finish will be provided with automatic and manual operation for sample cutting.

Here we have listed some amazing features and technical specifications you will get with Presto MFI tester-Deluxe model:

Features of Presto MFI Tester Deluxe model

This testing instrument provided by Presto has been built with a rigid metal base so that you will get stability during the testing operation. Besides this, you will get more features of the Presto MFI tester that we have listed below:

• This testing instrument comes with a high heating capacity from ambient to 400 degrees Celsius.
• You will get a pre-settable digital timer for selecting the test cycle time for sample testing.
• It has an advanced PID controller that will help you to do effective temperature control.
• This testing instrument has a stainless steel body that will help to use this testing instrument for a longer time without worrying about corrosion.
• You can easily do automatic and manual cutting of test specimens with the help of this testing instrument.
• Highly accurate testing results will be provided to determine sample quality.

These are some exclusive features you will get with Presto MFI Tester. Thus, you will use an MFI tester to determine your product’s quality easily. Now, let us dig deep into the technical specification of this economical testing instrument.

Technical specifications of Presto MFI tester-deluxe model

The Presto MFI tester has been designed with fail-proof features through which you will be able to calculate shear stress, molecular structure, shear rate, and viscosity of materials like polymers. Here we have listed the technical specifications of this testing instrument, which make it compelling to use.

• Equipment Range: Ambient to 400 degrees C. (Higher ranges also available on request)
• Working Range: Ambient to 260 degrees C.
• Heating Barrel Material: Die Steel
• Inner Diameter of Cylinder: 9.500 mm ± 0.005 mm.
• Length of Cylinder: 115 mm ± 0.005 mm
• Inner Diameter of Die: 2.090 mm ± 0.005 mm
• Dimensions of piston head: 9.47 mm diameter x 6.35 mm ± 0.10 mm in length
• Dead Weights: 1.2 kg, 2.16 kg, 3.8 kg, 5 kg
• Outer Body Material: Mild Steel Duly Powder Coated
• Least Count: 0.1 degrees C
• Repeatability: ±2.0 degree C
• Temperature Control: PID temperature controller
• Heating Control: SSR relay-25 Amp.
• Timing device: Digital preset timer with a maximum capacity of 999 hours
• Timer Least Count: 1 second
• Heater Wattage: 600 watts.
• Accuracy: ±2.0 degree C
• Cutting device Motor speed: 60 R.P.M
• Heat Sensor: PT-100, Platinum Resistance Temperature Detector (RTD)
• Electrical supply: 15 amps. 220 V ± 15%. Single-phase AC
• Power consumption: 1 KW

How to operate an MFI tester in a fail-proof way?

If you are all about to operate this testing instrument efficiently, then we suggest you follow these 5 simple steps. These steps will help to operate your testing instrument without getting any failures. So, let us get started!

• For accurate test results, it is essential to make sure that the machine is perfectly leveled. You can do this, by taking out the orifice die from the machine and inserting the plumb line inside the barrel. Now check the perpendicularity of the plumb line related to the ground. If the plumb line is perfectly perpendicular to the ground, this means the machine is perfectly leveled.
• After that, you can start the machine by plugging the main socket of the machine into a 3 pin 15 amp socket. The PID controller will show some readings on the PV (Process Value) and SV (Set Value). Set the SV value on the PID controller.
• After setting the temperature and time. . Wait for the reading in the PV display in the PID controller to reach the value of the SV display. After the required temperature for the test has been attained, fill the barrel of the machine with the plastic granules you want to test.
• Poke the granules with the plunger after they are inserted in the barrel. This will ensure close packing of the granules and eliminate the air between the granules. When the granules are inserted into the barrel, there will be a slight decrease in the PV value on the PID monitor. Wait for this value to again reach the SV value. We also need to preheat the granules before starting the test. Once the PV and SV values are the same, place the plunger provided with the machine along with the dead weight on it into the barrel.
• After placement of the plunger, there will be extrudate coming out of the die/orifice placed in the lower end of the barrel. When the time cycle on the digital timer will complete, the cutter will automatically cut the extrudate from the barrel. This can also be done manually if the machine is set on the manual operation. The first extrudate that is cut by the knife is discarded. The extrudate cut afterward should be considered for testing.

In this way, you can operate this testing machine effortlessly. Weigh the extrudate cut from the barrel using a digital balance. This weight will be used for calculating the Melt Flow Index of the sample. To get a FREE sample testing session, you can give us a call at +919210903903 or email us at info@prestogroup.com. You can also read our related blog on how you can evaluate the viscosity of thermostatic plastic with an MFI tester.