First, the tensile machine should first consider the quality needs when repairing. The difference in the range of tension determines the difference between the sensors used and the structure of the tension machine, but this has little effect on the price. For general flexible packaging manufacturers, a pull range of 100N is sufficient. Therefore, it is also decided to use a single arm type. Corresponding to the one-arm type is a gantry structure, which is adapted to a relatively large pulling force, such as 1T or more. Therefore, soft packaging manufacturers basically do not need.
Second, the problem of the test stroke during the maintenance of the tension machine. According to the performance and requirements of the flexible packaging film, the stroke can be 600-800mm. For materials with an elongation of more than 1000%, a stroke of 1000 or 1200 mm can be used.
Third, the standard configuration of the tension machine maintenance. The three basic configurations of intelligent: host, microcomputer, and printer, if the microcomputer is powerful, you can print directly. It can also be equipped with a regular computer. With a computer, you can perform complex data analysis, such as data editing, partial magnification, adjustable report formats, and statistical analysis of groups. If equipped with a computer, the manufacturer should give the corresponding control system.
Fourth, the output of the tensile machine maintenance. The test result output can be arbitrarily set: zui gravity value, elongation, tensile strength, constant force elongation, constant elongation force value, yield strength, elastic modulus, and large test force of Zui. This can be said to be a comprehensive result of the output of the microcomputer when the microcomputer is operated. Some manufacturers in foreign countries can generally output these 8 items. Some domestic manufacturers can output 5-6 items, and some manufacturers can only output zui value, average value, and zui small value.
5. When the tension machine is being repaired, it can be used as an experimental project. Flexible packaging requires a multi-purpose tensile machine, that is, on the basis of different fixtures, it can be used for stretching, compression, bending, tearing, shearing, 180 degree peeling, and 90 degree peeling test. There are some high-end tensile machines on the market. In addition to the above items, the friction coefficient can also be tested due to the high precision of the sensors (some of which reach 250,000).
Sixth, tensile machine maintenance product machinery main configuration: transmission, with screw drive and rack drive, the former is expensive, for high precision, high test repeatability; the latter is cheap, for low precision, low test repeatability. The lead screw has a decisive effect on the measurement of the pull force accuracy. Generally there are ball screws, trapezoidal screws, and general screw. Among them, the accuracy of the ball screw is high, but its performance depends on the operation of the computer servo system, and the whole price is relatively expensive. The precision required for flexible packaging, that is, 0.5-1% accuracy, can be achieved with a general lead screw and a lead screw. Transmission, geared and chain drive, the former is expensive for high precision; the latter is cheap for low precision. Sensors, the main cost lies in the life, photoelectric induction is one of the more advanced technology, generally more than 100,000 times.
Rongcheng Jingyi Oceanic Technology Company Limited , https://www.jingyifoods.cn