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XNR-400B
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Melt flow rate meter
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Description
I. technical indicators:
1.1 temperature range
Set any temperature control point within the range of room temperature - 300 ℃
Use PID to adjust and reach the temperature control point in 15 minutes
1.1.1 temperature control accuracy
Temperature fluctuation at 10 mm of the upper end of the discharge port ≤± 0.5 ℃
1.1.2 heating power: 1KW
1.1.3 temperature gradient
Temperature gradient within 10-140 mm at the upper end of discharge port < 1 ℃
1.1.4 cutting device
Automatic timing cutting; manual cutting
1.1.5 power supply: 220 ± 22V, 50Hz
1.1.6 external dimension of instrument: 420x280x650
1.1.7 instrument weight: About 60kg
1.2 extrusion part
1.2.1 inner diameter of discharge port: Φ 2.095 ± 0.005mm
1.2.2 outlet length: 8.000 ± 0.025mm
1.2.3 inner diameter of charging barrel: Φ 9.550 ± 0.025mm
1.2.4 charging barrel length: 160mm
1.2.5 load:
Accuracy ≤± 0.5%
Combined load: 0.325kg, 1.200kg, 2.160kg, 3.800kg,
5 kg
1.2.6 diameter of piston rod head: Φ 9.475 ± 0.015mm
II. Main structure
The instrument is mainly composed of four parts: timing system, temperature control system, load and cutting device.
A. cutting control system
III. working principle
XNR-400B is a kind of plastic extrusion instrument. It uses a high temperature heating furnace to melt the tested object at a specified temperature. The test object in this melting state is extruded through a certain diameter hole under a specified load. In plastic production, melt index is often used to express the physical properties of polymer materials, such as fluidity, viscosity, etc. in the melting state. The so-called melt mass flow rate refers to the average weight of each section of extruded samples converted to 10 minutes of extrusion. The unit is (g / 10min), expressed by MFR:
MFR=600×m÷t
Formula:
MFR - melt mass flow rate, g / 10min;
M - the average value of multi-stage samples, G;
T-Time interval of sample cutting, s;
600 - reference time (10min;), S
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