腾达试验仪器厂：

　　橡胶低温脆性试验仪符合HG2-162-1965塑料低温冲击压缩试验方法和GB5470-2008塑料冲击脆化温度试验方法等**标准。橡胶、塑料、防水卷材在规定条件下试样受冲击出现破坏时的A高温度，即为脆性温度，可以对塑料及其他弹性材料在低温条件下的使用性能作比较性鉴定。可以测定不同橡胶材料或不同配方的硫化橡胶的脆性温度和低温性能的优劣。

　　The low temperature brittleness tester complies with the HG2-162-1965 plastic low temperature impact compression test method and GB5470-2008 plastic impact embrittlement temperature test method and other standards.The high A temperature when rubber,plastic,and waterproof membranes are damaged under impact under specified conditions is the brittle temperature.It can make a comparative identification of the performance of plastics and other elastic materials at low temperatures.It can determine the pros and cons of brittleness temperature and low temperature performance of vulcanized rubber with different rubber materials or different formulations.

　　橡胶低温脆性试验仪各项技术指标符合GB/T 1682-1994硫化橡胶低温脆性单试样法等**标准的要求。本仪器再原有设计中，增加了冷井搅拌器，使容器四周温度更均匀，下降温度更快，节约时间，降低了能耗。

　　Various technical indicators of the low temperature brittleness tester meet the requirements of GB/T 1682-1994 vulcanized rubber low temperature brittleness single sample method and other standards.In the original design of the instrument,a cold well agitator was added to make the temperature around the container more uniform,lower the temperature faster,save time and reduce energy consumption.

　　橡胶低温脆性试验仪技术参数：

　　★试验温度：-40℃—0℃

　　★冲击速度：2m/s±0.2m/s

　　★恒温后，试验3min时间内温度波动：＜±0.5℃

　　★冲击器中间到夹持器下端距离：11±0.5mm

　　★外型尺寸：720×700×1380mm

　　★功率：1100W

　　★冷井容积：3L

　　Technical parameters of low temperature brittleness tester

　　★Test temperature:-40℃—0℃

　　★Impact speed:2m/s±0.2m/s

　　★Temperature fluctuation within 3min after constant temperature test:<±0.5℃

　　★Distance from the middle of the impactor to the lower end of the gripper:11±0.5mm

　　★External dimensions:720×700×1380mm

　　★Power:1100W

　　★Cool well volume:3L

　　橡胶低温脆性试验仪结构原理：

　　★升降夹持器

　　升降夹持器由带有夹持器的气缸和气缸座组成。

　　从试样受冲击部位，到夹持器下端的距离为11.0±0.5mm

　　★冲击装置

　　冲击装置由弹簧器和冲头组成。

　　★冲击器

　　冲击器头部形状和尺寸。冲击器的重量为200±20g，其工作行程为40±1mm。冲击气缸在复位状态下，冲击器端部到试样的距离为25±1mm。

　　Structure principle of low temperature brittleness tester

　　★Lifting gripper

　　The lifting clamp consists of a cylinder with a clamp and a cylinder block.

　　The distance from the impacted part of the sample to the lower end of the holder is 11.0±0.5mm

　　★Impact device

　　The impact device consists of a spring device and a punch.

　　★Impactor

　　Impactor head shape and size.The weight of the impactor is 200±20g,and its working stroke is 40±1mm.In the reset state of the impact cylinder,the distance from the end of the impactor to the sample is 25±1mm.

　　橡胶低温脆性试验仪使用方法：

　　★接通电源，温控仪和计时器显示灯亮。

　　★向冷井中注入冷冻介质（一般为工业乙醇），其注入量应保证夹持器的下端到液面的距离为75±10mm。

　　★将试样垂直夹在夹持器上。夹的不宜过紧或过松，以防止试样变形或脱落。

　　★按下夹持器，开始冷冻试样，同时启动时序控制开关（或按动秒表）计时。试样冷冻时间规定为3.0±0.5min。试样冷冻期间，冷冻介质温度波动不得超过±1℃。

　　★提起升降夹持器，使冲击器在半秒钟内冲击试样。

　　★取下试样，将试样按冲击方向弯曲成180°，仔细观察有无破坏。

　　★试样经冲击后（每个试样只准冲击一次），如出现破坏时，应提高冷冻介质的温度，否则降低其温度，继续进行试验。

　　通过反复试验，确定至少有两个试样不破坏的A低温度和至少一个试样破坏的A高温度，如这两个结果相差不大于1℃时，即试验结束。

　　How to use low temperature brittleness tester

　　★Turn on the power,the temperature controller and timer indicator lights up.

　　★Inject cold medium(usually industrial ethanol)into the cold well,and the injection volume should ensure that the distance from the lower end of the holder to the liquid surface is 75±10mm.

　　★Clamp the sample vertically on the holder.The clamp should not be too tight or too loose to prevent the sample from deforming or falling off.

　　★Press the gripper to start freezing the sample,and start the timing control switch(or press the stopwatch)to count.Specimen freezing time is specified as 3.0±0.5min.During the freezing of the sample,the temperature fluctuation of the freezing medium must not exceed±1°C.

　　★Lift the lifting clamp to make the impactor impact the sample within half a second.

　　★Remove the sample,bend the sample to 180°in the direction of impact,and carefully observe whether there is damage.

　　★After the sample is impacted(each sample is allowed to be impacted only once),if damage occurs,the temperature of the refrigerating medium should be increased,otherwise the temperature should be lowered and the test continued.

　　Through repeated tests,it is determined that there are at least two samples that do not break the A low temperature and at least one sample that do not break the A high temperature.If the difference between the two results is not greater than 1°C,the test is over.

　　橡胶低温脆性试验仪试验标准：

　　1规格

　　试样的长为25.0±0.5mm，宽为6.0±0.5mm，厚为2.0±0.3mm。

　　2要求

　　试样的表面应光滑，无外来杂质及损伤。成品应经打磨后裁制成相应尺

　　Low temperature brittleness tester test standard

　　1 specifications

　　The length of the sample is 25.0±0.5mm,the width is 6.0±0.5mm,and the thickness is 2.0±0.3mm.

　　2 requirements

　　The surface of the sample should be smooth and free of foreign impurities and damage.The finished product should be cut to the appropriate size after grinding