采用*小分度不大于1度的低温测温计测量冷冻介质的温度,可使用低温温度计、热电偶、电阻温度计等。低温温度计为内标式半浸的,以尾长150MM,浸入液体深度75MM为宜。
低温脆性试验机厂* 冷冻介质
冷冻介质由适宜的传热介质加致冷剂调配而成。
使用方法
1接通电源,温控仪和计时器显示灯亮。
2向冷井中注入冷冻介质(*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。
3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。
4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℃。
5提起升降夹持器,使冲击器在半秒钟内冲击试样。
6取下试样,将试样按冲击方向弯曲成180°,仔细观察有无破坏。
7试样经冲击后(每个试样只准冲击*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。 温度,如这两个结果相差不大于1℃时,即试验结束。
Usage method
1. Turn on the power, and the temperature controller and timer display lights will light up.
Inject refrigerant (usually industrial ethanol) into the cold well at a rate that ensures a distance of 75 ± 10mm from the lower end of the gripper to the liquid level.
3. Clamp the sample vertically onto the gripper. The clamp should not be too tight or too loose to prevent deformation or detachment of the sample.
4. Press the gripper to start freezing the sample, and at the same time, activate the timing control switch (or press the stopwatch) for timing. The freezing time of the sample is specified as 3.0 ± 0.5min. During the freezing period of the sample, the temperature fluctuation of the freezing medium shall not exceed ± 1 ℃.
Lift the lifting clamp and allow the impactor to impact the specimen within half a second.
6. Remove the sample, bend it 180 ° in the direction of impact, and carefully observe for any damage.
After 7 samples have been impacted (each sample is only allowed to be impacted once), if damage occurs, the temperature of the freezing medium should be increased, otherwise the temperature should be lowered and the test should continue. When the temperature difference between these two results is not greater than 1 ℃, the test is completed.
特点及用途:
低温脆性试验机是测定材料在规定条件下试样受冲击出现破坏时的*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。因此无论在科学研究材料及其制品的质量检验,生产过程的控制等方面均是不可缺少的。
技术参数:
1.控温范围:室温 -70℃(室温≤25℃)
2.恒温精度:±0.3℃
3.降温速度:0℃~﹣30℃ 约2.5℃/min
﹣30℃~﹣40℃ 约2.5℃/min
﹣40℃~﹣70℃ 约2.0℃/min
4.*大外形尺寸:900×500×800mm(长×宽×高)
5.工作室有效工作空间:280×170×120mm(长×宽×高)
6.可装试样数量:1
7.数字计时器数字计时器:0秒 -99分钟,分辨率1秒
8.冷却介质:乙醇或其他不冻液
9.搅拌电机:8W
10.工作电源:220V--240V,50Hz,1.5kW
11.工作温度:≤25℃
结构原理
A、本设备由制冷压缩机主机体、加热装置、电子控制箱、冷却槽、冷却介质循环系统、自动报警装置等部分组成。启动制冷开关后,压缩机开始工作,制冷系统进入正式工作状态。制冷压缩机连续不断的工作,当接近设定温度时,冷却槽中的加热装置开始按比例提供热量,用以平衡制冷系统产生的多余冷量,以达到恒温的目的。搅拌可使冷却槽内的冷却介质不断循环,使温度均匀*致。
B、试样夹持器
试样*边夹持4个试样(橡胶类),另*边夹持15个试样(塑料类)。
C、冲击装置
冲击装置由冲击锤和自锁机构组成。
D、冲击器
冲击头半径为1.6±0.1mm;
冲击时,冲击头和试样夹持器之间间隙为6.4±0.3mm;
冲击头的中心线与试样夹持器之间的距离为8±0.3mm。
Structural Principles
A. This equipment consists of a refrigeration compressor main body, a heating device, an electronic control box, a cooling tank, a cooling medium circulation system, an automatic alarm device, and other components. After activating the refrigeration switch, the compressor starts working and the refrigeration system enters the official working state. The refrigeration compressor operates continuously, and as it approaches the set temperature, the heating device in the cooling tank begins to provide heat proportionally to balance the excess cooling generated by the refrigeration system and achieve constant temperature. Stirring can continuously circulate the cooling medium in the cooling tank, ensuring a uniform and consistent temperature.
B. Sample holder
One side of the sample holds 4 samples (rubber type), and the other side holds 15 samples (plastic type).
C. Impact device
The impact device consists of an impact hammer and a self-locking mechanism.
D. Impactor
The radius of the impact head is 1.6 ± 0.1mm;
During impact, the gap between the impact head and the sample holder is 6.4 ± 0.3mm;
The distance between the centerline of the impact head and the sample holder is 8 ± 0.3mm.
特点及用途:
低温脆性试验机是测定材料在规定条件下试样受冲击出现破坏时的*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。因此无论在科学研究材料及其制品的质量检验,生产过程的控制等方面均是不可缺少的。
适用行业:
可以用来考核和确定电工、电子、汽车电器、材料等产品,在低温环境条件下贮存和使用的适应性,适用于学校,工厂,军工,研位,等单位。
注意事项
1在试验过程中不能切断冷却循环,否则会产生不制冷的效果。
2气缸压力在出厂前已调节好,不能任意变动。
组成
设备由工作台、升降夹持器、冲击装置、低温测温计、盛装冷冻介质的低温容器、搅拌器等部分组成。
升降夹持器
升降夹持器由夹持器和升降装置组成
从试样受冲击部位,到夹持器下端的距离为(11.0加或等于0.5)mm。
冲击装置
冲击装置由冲击器和冲击弹簧等组成。
冲击器
冲击器头部形状和尺寸,冲击器的质量为(200±20)g,其工作行程为(40±1)mm。冲击装置的弹簧在压缩状态下,冲击器端部到试样的距离为(25±1)mm。
低温测温计
采用*小分度不大于1度的低温测温计测量冷冻介质的温度,可使用低温温度计、热电偶、电阻温度计等。低温温度计为内标式半浸的,以尾长150MM,浸入液体深度75MM为宜。
冷冻介质
冷冻介质由适宜的传热介质加致冷剂调配而成。
试验报告
A 本标准名称或编号
B 样品的详细说明及其来源
C 使用的传热介质、致冷剂或其他降温方式
D 程序A:脆性温度和试样破坏现象
E 程序B:规定的试验温度和试验结果
试验结果与处理
程序A
1、试样出现破坏的*高温度,就是该试样的脆性温度。
2、温度值应精确到1度。
程序B
如果*组试样中没有任何1个试样破坏,则试验结果为无破坏。如果*组试样中有2个或2个以上试样发生破坏,则试验结果为破坏。如果*组试样中只有*个试样发生破坏,则再次取3个新的完好试样测试,3个试样均未发生破坏则试验结果为无破坏;否则试验结果为破坏。
Test report
A Name or number of this standard
Detailed description and source of sample B
The heat transfer medium, refrigerant, or other cooling methods used in C
Procedure A: Brittleness temperature and specimen failure phenomenon
E Procedure B: Prescribed Test Temperature and Test Results
Test results and handling
Program A
1. The highest temperature at which the sample undergoes failure is the brittle temperature of the sample.
2. The temperature value should be accurate to 1 degree.
Program B
If no one sample in a group is damaged, the test result is no damage. If two or more samples in a group are damaged, the test result is considered as damaged. If only one sample in a group is damaged, take three new intact samples for testing. If none of the three samples are damaged, the test result is no damage; Otherwise, the test result will be considered as failure.
售后服务
(1)免费送货到用户指定的地点,免费指导安装、培训及调试。
(2)产品质保期:自安装正常使用日起*年;
(3)质保期内若产品出现质量问题,供货方负责免费维修,质保期外仅收成本费。零部件常年供应.