XNR-400B

1. Technical Specifications:

1.1 Temperature Range

    Room Temperature - 300℃Any set temperature control point within the range

Using PIDRegulation, reaches the control temperature point in fifteen minutes

1.1.1Temperature Control Accuracy

At the upper end of the outlet 10Temperature fluctuation ≤ ±0.5℃ at 10 mm

1.1.2Heating Power: 1KW

1.1.3Temperature Gradient

At the upper end of the outlet 10 - 140Temperature gradient < 1℃ within 10 mm

1.1.4Cutting Device

    Automatic timed cutting; manual cutting

1.1.5Power Supply: 220±22V, 50HZ

1.1.6Instrument Dimensions: 420X280X650

1.1.7Instrument Weight: Approximately 60KG

1.2  Extrusion Outlet Section

1.2.1Outlet Inner Diameter: Φ2.095±0.005mm

1.2.2Outlet Length: 8.000±0.025mm

1.2.3Loading Cylinder Inner Diameter: Φ9.550±0.025mm

1.2.4Loading Cylinder Length: 160mm

1.2.5Load:

     Accuracy ≤ ±0.5%

     Combined Load: 0.325kg, 1.200 kg, 2.160 kg, 3.800 kg,

5.000 kg

1.2.6Piston Rod Head Diameter: Φ9.475±0.015mm

2. Main Structure

   This instrument mainly consists of four parts: timing system, temperature control system, load, and cutting device.

A.Cutting Control System

Set cutting interval time from 1 to 9999 seconds, the set time is not lost when power is off.When setting, the upper four-digit display shows the set value of the cutting interval, and the lower four-digit display shows the set value of the relay pull-in time, which is 0001.Please do not modify. For example: to set the cutting interval to 240 seconds, change the four digits after WOK to 0240, and keep the number after RELY unchanged at 0001.During normal operation, the upper four-digit LED display shows the current cutting interval count value, and the lower four-digit display shows the set value of the cutting interval time. Specific setting method:

   1. Position Selection Key >: When setting, used to select a certain digit, the selected digit will flash.2. Increase Key ∧: When setting, after pressing the position selection key >, press this key to change the value of the flashing position, this value increases unidirectionally.

 13. Reset Key □

 2: During normal operation, pressing the reset key restores the timer to the initial value of the release time (i.e., the upper display shows the initial value of the relay release time, and the lower display shows the set value of the relay release time), releasing the reset key, the timer starts timing from the initial value of the release time.

 3B4. Temperature Control System

5. Press the "set" key, this key is used to change the test parameters;6. Press the "<" key, this key is used to move the digital cursor of the "SV" set test temperature display window, move the cursor to the relevant position to change the parameters;

17. Press the "∧" or "∨" key to set the test temperature value;8. After setting the test temperature value, press the "set" key again to confirm the parameters, at this time the "OP1" indicator light flashes, and when the set temperature is reached, heating stops automatically, and the "OUT" indicator light goes out.

2Note: The temperature instrument interface has a total of four keys, during operation only the up and down arrows can be pressed, do not touch other keys to avoid affecting the use of the instrument.C

39. LoadThe load is the combined mass of the weights and the material rod assembly (piston rod + thermal insulation sleeve + 1# weight). The specific matching method is shown in the table below:

4Weight (g)Combination (g)

Piston Rod + Thermal Insulation Sleeve + 1

# Weight+1835

+4675D

D、.Cutting Device

自动切割装置由电动机、连杆、刀片组成。安装在料筒底部，体积小巧，动作灵活。

三、 工作原理

XNR-400B型熔体流动速率仪是一种塑料挤出仪器。它是在规定温度条件下，用高温加热炉使被测物成熔融状态。这种熔融状态的被测物，在规定的负荷下通过一定直径的小孔进行挤出试验。在塑料生产中，常用熔指数来表示高分子材料在熔融状态下的流动性、粘度等物理性能，所谓熔体质量流动速率就是指挤出的各段试样的平均重量折算为10The extrusion amount per minute. The unit is (g/10min), represented by MFR:

MFR=600×m÷t

In the formula:

MFR- Melt mass flow rate, g/10min;

m- Average value of multiple segment samples, g;

t- Sampling time interval, s;

       600- Reference time (10min;), s.