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旋转黏度计的历史
由美国Brookfield家族开创的旋转粘度测量法，利用其独特的转子与流体之间产生的剪切和阻力之间的关系而得出的全新的粘度值，开创了动力粘度的测量先河。Brookfield家族以自己家族的名字为品牌设计了世界上一台动力粘度测量仪，也就是旋转粘度测量仪，也就是今天的布氏粘度计。而布氏也正是Brookfield家族的名称简写。
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达因笔测试原理
达因笔测试原理 应用表面张力测试笔，能够很容易的分析出不同固体的表面能力、亲水性、润湿度等微小变化。分析方法简单且有效，仅在基材表面上划一道痕就能迅速知道准确结果。这是专为生产线的测试而设计的，由工厂经过培训的操作者进行。 测试时，应选择一个中间值来作起点，如38mN/m,测试时，如果在2秒内测试笔湿了基材表面，则基材表面张力比所选值要大或正好，那么须要选一更大值的测试笔进行第二次测试，如此类推，直到测试结果在2秒内改缩成水珠（球状），则这次测试之前一次的值就被视为基材的表面能。并以此作比较分析用。
Dyne pen test principle
Dyne pen test principle Using the surface tension test pen, it is easy to analyze the surface ability, hydrophilicity, wettability and other small changes of different solids. The analysis method is simple and effective, and the accurate result can be quickly known by only scratching a mark on the surface of the substrate. This is specially designed for production line testing and is carried out by trained operators in the factory. During the test, an intermediate value should be selected as the starting point, such as 38mN/m. During the test, if the test pen wets the surface of the substrate within 2 seconds, the surface tension of the substrate is greater than the selected value or just right, then you need to select A test pen with a larger value is used for the second test, and so on, until the test result is reduced to a water droplet (spherical) within 2 seconds, the previous value of this test is regarded as the surface energy of the substrate. And use this for comparative analysis.
打孔机的常见故障
常见故障 一、冲头打下去上不来： 1、将气压调至4-5KG\GM 2、将打孔机冲头上调合适位置，使打孔机冲头打下去浅点. 二、打出来有毛边或打不掉： 1、先用金钢挫将下模磨五六分钟左右，然后用油石磨二三分钟即可， 三、冲孔时会拉坏塑料袋： 1、检查气压是否偏低 2、检查打孔信号系统是否正常 3、检查打孔机与切刀是否同步 四、打孔机打下去的停留时间是否过长间歇性冲不到孔或时好时坏： 1、检查气压是否偏低 2、气量是否不足 3、检查电磁阀是否进水或消声器堵塞 4、检查气缸是否漏气
Common faults of punching machine
Common malfunctions 1. The punch can't come up after hitting it: 1. Adjust the air pressure to 4-5KG\GM 2. Adjust the punch of the punching machine to a suitable position, so that the punch of the punching machine is lowered. 2. There are burrs or can't be knocked out: 1. Grind the lower mold for about five or six minutes with a gold steel set, and then use a whetstone for two to three minutes. 3. The plastic bag will be broken when punching: 1. Check whether the air pressure is low 2. Check whether the punching signal system is normal 3. Check whether the punching machine and the cutter are synchronized 4. Whether the residence time of the punching machine is too long, intermittently unable to punch the hole or sometimes it is good and bad: 1. Check whether the air pressure is low 2. Is the air volume insufficient? 3. Check whether the solenoid valve has water or the muffler is blocked 4. Check whether the cylinder is leaking
气动泵的工作原理
气动隔膜泵是一种由膜片往复变形造成容积变化的容积泵，其工作原理近似于柱塞泵，由于隔膜泵工作原理的特点，因此隔膜泵具有以下特点:（1）泵不会过热：压缩空气作动力，在排气时是一个膨胀吸热的过程，气动泵工作时温度是降低的，无有害气体排出。
