橡膠低溫脆性試驗(yàn)儀符合HG2-162-1965塑料低溫沖擊壓縮試驗(yàn)方法和GB5470-2008塑料沖擊脆化溫度試驗(yàn)方法等**標(biāo)準(zhǔn)。橡膠、塑料、防水卷材在規(guī)定條件下試樣受沖擊出現(xiàn)破壞時(shí)的A高溫度，即為脆性溫度，可以對(duì)塑料及其他彈性材料在低溫條件下的使用性能作比較性鑒定。可以測(cè)定不同橡膠材料或不同配方的硫化橡膠的脆性溫度和低溫性能的優(yōu)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.

橡膠低溫脆性試驗(yàn)儀各項(xiàng)技術(shù)指標(biāo)符合GB/T 1682-1994硫化橡膠低溫脆性單試樣法等**標(biāo)準(zhǔn)的要求。本儀器再原有設(shè)計(jì)中，增加了冷井?dāng)嚢杵?，使容器四周溫度更均勻，下降溫度更快，?jié)約時(shí)間，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.

橡膠低溫脆性試驗(yàn)儀技術(shù)參數(shù)：

★試驗(yàn)溫度：-40℃—0℃

★沖擊速度：2m/s±0.2m/s

★恒溫后，試驗(yàn)3min時(shí)間內(nèi)溫度波動(dòng)：＜±0.5℃

★沖擊器中間到夾持器下端距離：11±0.5mm

★外型尺寸：720×700×1380mm

★功率：1100W

★冷井容積：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

橡膠低溫脆性試驗(yàn)儀結(jié)構(gòu)原理：

★升降夾持器

升降夾持器由帶有夾持器的氣缸和氣缸座組成。

從試樣受沖擊部位，到夾持器下端的距離為11.0±0.5mm

★沖擊裝置

沖擊裝置由彈簧器和沖頭組成。

★沖擊器

沖擊器頭部形狀和尺寸。沖擊器的重量為200±20g，其工作行程為40±1mm。沖擊氣缸在復(fù)位狀態(tài)下，沖擊器端部到試樣的距離為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.

橡膠低溫脆性試驗(yàn)儀使用方法：

★接通電源，溫控儀和計(jì)時(shí)器顯示燈亮。

★向冷井中注入冷凍介質(zhì)（一般為工業(yè)乙醇），其注入量應(yīng)保證夾持器的下端到液面的距離為75±10mm。

★將試樣垂直夾在夾持器上。夾的不宜過(guò)緊或過(guò)松，以防止試樣變形或脫落。

★按下夾持器，開始冷凍試樣，同時(shí)啟動(dòng)時(shí)序控制開關(guān)（或按動(dòng)秒表）計(jì)時(shí)。試樣冷凍時(shí)間規(guī)定為3.0±0.5min。試樣冷凍期間，冷凍介質(zhì)溫度波動(dòng)不得超過(guò)±1℃。

★提起升降夾持器，使沖擊器在半秒鐘內(nèi)沖擊試樣。

★取下試樣，將試樣按沖擊方向彎曲成180°，仔細(xì)觀察有無(wú)破壞。

★試樣經(jīng)沖擊后（每個(gè)試樣只準(zhǔn)沖擊一次），如出現(xiàn)破壞時(shí)，應(yīng)提高冷凍介質(zhì)的溫度，否則降低其溫度，繼續(xù)進(jìn)行試驗(yàn)。

通過(guò)反復(fù)試驗(yàn)，確定至少有兩個(gè)試樣不破壞的A低溫度和至少一個(gè)試樣破壞的A高溫度，如這兩個(gè)結(jié)果相差不大于1℃時(shí)，即試驗(yàn)結(jié)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.

橡膠低溫脆性試驗(yàn)儀試驗(yàn)標(biāo)準(zhǔn)：

1規(guī)格

試樣的長(zhǎng)為25.0±0.5mm，寬為6.0±0.5mm，厚為2.0±0.3mm。

2要求

試樣的表面應(yīng)光滑，無(wú)外來(lái)雜質(zhì)及損傷。成品應(yīng)經(jīng)打磨后裁制成相應(yīng)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