简单介绍】

塑料熔体流动速率测定仪由加热炉和控温系统所组成并安装在机身（立柱）底座上。温控部分采用单片机调功率控温方式，它的抗*力强，控温精度高，控制稳定，炉内加热丝按一定规律缠绕在加热棒上，使温度梯度为zui小，以满足标准要求。

【详细说明】

塑料熔体流动速率测定仪

塑料熔体流动速率测试仪是一种挤出塑料计。它是在规定温度条件下，用高温加热炉使被测物达到熔融状态。这种熔融状态的被测物，在规定的砝码的负荷重力下通过一定直径的小孔进行挤出试验。在工业企业的塑料生产中及科研单位的研究中，经常用“熔体（质量）流动速率”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。所谓熔融指数就是指挤出物各段试样的平均重量折算为10分钟的挤出量。
熔体（质量）流动速率仪用MFR表示，单位为：克/10分钟（g/min）公式表示：MFR(θ、mnom )
                       =tref  .m/t
式中： θ——  试验温度
          mnom—  标称负荷Kg
           m ——  切断的平均质量g
          tref ——  参比时间（10min）, S ( 600s )
           t  ——  切断的时间间隔s
     例：一组塑料试样，每30秒钟切取一段，各段质量的结果是：0.0816克、0.0862克、0.0815克、0.0895克、0.0825克取。
平均值m 
=（0.0816+0.0862+0.0815+0.0895+0.0825）÷5=0.0843(克)
代入公式：MFR=600×0.0843/30=1.686(克/10分钟)

塑料熔体流动速率测定仪由加热炉和控温系统所组成并安装在机身（立柱）底座上。
温控部分采用单片机调功率控温方式，它的抗*力强，控温精度高，控制稳定，炉内加热丝按一定规律缠绕在加热棒上，使温度梯度为zui小，以满足标准要求。

塑料熔体流动速率测试仪主要技术参数：

产品型号：WJ-400B
1、    挤压出料部分：
出料口直径：Φ2.095±0.005毫米
出料口长度：8.000±0.025毫米
装料筒直径：Φ9.550±0.025毫米
装料筒长度：152±0.1毫米
活塞杆头直径：9.475±0.015毫米
活塞杆头长度：6.350±0.100毫米
2、    塑料熔体流动速率测定仪标准试验力（八级）
1级：0.325 kg=（活塞杆+砝码托盘+隔热套+1号砝码体）
=3.187N
2级：1.200 kg=(0.325+2号0.875砝码)=11.77 N
3级：2.160 kg=(0.325+3号1.835砝码)=21.18 N
4级：3.800 kg=(0.325+4号3.475砝码)=37.26 N
5级：5.000 kg=(0.325+5号4.675砝码)=49.03 N
6级：10.000 kg=(0.325+5号4.675砝码+6号5.000砝码)=98.07 N
7级：12.000 kg=(0.325+5号4.675砝码+6号5.000+7号2.500砝码)=122.58 N
8级：21.600 kg=(0.325+2号0.875砝码+3号1.835+4号
3.475+5号4.675+6号5.000+7号2.500+8号2.915砝码)=211.82 N
砝码质量相对误差≤0.5%。
3、  温度范围：室温-450℃
4、  恒温精度：±0.01℃。
5、  电源：220V±10%    50Hz
6、  工作环境条件：环境温度为-10℃-40℃；环境相对湿度为30%-80%；周围无腐蚀性介质，无较强的空气对流；周围无振动、无较强的磁场干扰。
7、  塑料熔体流动速率测试仪仪器外形尺寸：250×350×600=（长×宽×高）

Brief introduction

The plastic melt flow rate meter is composed of heating furnace and temperature control system and installed on the base of the fuselage.
Temperature control part adopts single chip microcomputer power temperature control mode, its strong anti-interference ability, high precision temperature control, stable control, furnace heating wire winding on the heating rods according to certain rule, minimize the temperature gradient is, in order to meet the standard requirements.
[detailed description]
Plastic melt flow rate meter
Plastic melt flow rate tester is a kind of extrusion plastic meter.
It is under the specified temperature condition, the heat furnace is used to make the measured objects melt.
This molten state is tested by means of a certain diameter hole under the weight of the specified weight.
In industrial enterprises in the production of plastic and scientific research units of study, often with the melt flow rate (quality) to represent the liquidity of polymer materials in the molten state, viscosity and other physical properties.
The melt index means the average weight of the sample of the extruder is 10 minutes.
Melt (mass) flow rate meter is expressed in MFR, and the unit is: gram /10 minutes (g/min) formula: MFR (theta, mnom)
= tref.m/t
In the formula: theta -- test temperature
Mnom - nominal load Kg
M -- the average mass of the cut off is g
Tref - reference time (10min), S (600s)
T -- the time interval between the cuts
For example: a group of plastic samples are cut every 30 seconds, and the results of the quality are: 0.0816 g, 0.0862 g, 0.0815 g, 0.0895 g, 0.0825g.
The average m
= (0.0816 +0.0862+0.0815+0.0895+ 0.0825) 5=0.0843 (g)
Substitution formula: MFR=600 x 0.0843/30=1.686 (g /10 minutes)
The plastic melt flow rate meter is composed of heating furnace and temperature control system and installed on the base of the fuselage.
Temperature control part adopts single chip microcomputer power temperature control mode, its strong anti-interference ability, high precision temperature control, stable control, furnace heating wire winding on the heating rods according to certain rule, minimize the temperature gradient is, in order to meet the standard requirements.
Main technical parameters of plastic melt flow rate tester:
Product model: wj-400b
1. Extruded parts:
Discharging mouth diameter: Φ 2.095 + / - 0.005 mm
Outlet length: 8.000 + 0.025 mm
Charging tube diameter: Φ 9.550 + / - 0.025 mm
Loading cylinder length: 152 + 0.1mm
Piston rod head diameter: 9.475 + 0.015 mm
Piston rod head length: 6.350 + 0.100 mm
2. Standard test force of plastic melt flow rate meter (level 8)
Level 1:0.325 kg= (piston rod + weight tray + heat shield +1 weight)
N = 3.187
Level 2:1.200 kg=(0.325+2 0.875 weight) =11.77 N
Level 3:2.160 kg=(0.325+3 1.835 weight) =21.18 N
Level 4:3.800 kg=(0.325+4 3.475 weight) =37.26 N
Level 5:5.000 kg=(0.325+5 4.675 weight) =49.03 N
Level 6:10.000 kg=(0.325+5 4.675 weight +6 5.000 weight) =98.07 N
Level 7:12.000 kg=(0.325+5 4.675 weight +6 5.000+7 2.500 weight) =122.58 N
Level 8:21.600 kg=(0.325+ 2, 0.875 weight + 3, 1.835+ 4)
3.475+5 no. 4.675+6 5.000+7 2.500+8 2.915 weight) =211.82 N
The relative error of weight is less than 0.5%.
3, temperature range: 50-400 ℃
4, the constant temperature precision: plus or minus 0.5 ℃.
5. Power supply: 220V plus or minus 10% 50Hz
6, work environment conditions: the environment temperature is 10 ℃ and 40 ℃;
Environmental relative humidity is 30%-80%;
There is no corrosive medium, no strong convection of air;
There is no vibration or strong magnetic interference.
7. Plastic melt flow rate tester instrument dimensions: 250 x 350 x 600= (length x width x height)