Tensile Testing Machine is widely used in textile, protective clothing mask, wire and cable, rubber and plastic, home appliances, paper and other industries of material testing and analysis, is the ideal testing equipment for scientific research institutes, universities and colleges, industrial and mining enterprises, technical supervision, commercial arbitration and other departments. Can test a variety of materials and finished products, semi-finished products, such as tensile, compressive, bending, shear physical properties, the purchase of a variety of different fixtures can do tensile, compressive, holding tensile, holding pressure, bending, tearing, peeling, adhesion, shear force test.
1, first of all, should consider the need to test the range of material tension.
The difference in the range of tension determines the different sensors used, which also determines the structure of the Protective Mask Tensile Testing Machine, but this has little impact on the price. For general flexible packaging manufacturers, the tension range of 100 Newton is sufficient. Therefore, it is also decided to use a single-arm type can be.
The structure corresponding to the single-arm type is the door type structure, which is adapted to a relatively large pull, such as a ton or more. So flexible packaging manufacturers basically do not use.
2, the test stroke problem.
According to the performance and requirements of flexible packaging film needs to be tested, the stroke in 600-800mm can be. Material elongation of more than 1000% can choose to travel 1000 or 1200mm.
3, the standard configuration issues.
Intelligent three basic configurations: host, microcomputer, and printer, if the microcomputer function is strong can be printed directly. In addition can also be equipped with a general computer. With a computer, you can carry out complex data analysis, such as data editing, local enlargement, adjustable report form, statistical analysis of grouped samples.
If equipped with a computer, the manufacturer should be given to join the corresponding control system.
Protective Mask Tensile Testing Machine test results output results can be arbitrarily set: maximum force value, elongation, tensile strength, constant force elongation, constant elongation force value, yield strength, modulus of elasticity, maximum test force of 8. This can be said to be the most comprehensive results output when operated by microcomputer. The products of some foreign manufacturers can generally output these 8 items. Some domestic manufacturers can output 5-6, some manufacturers can only output the maximum force value, the average value, the minimum value of three.
5, on the experimental items can be done.
Flexible packaging requires Protective Mask Tensile Testing Machine a multi-use, that is, on the basis of equipped with different fixtures, can do tensile, compression, bending, tearing, shear, 180 degrees peel, 90 degrees peel test.
There are some high-grade tension machine on the market in addition to the above items, because of the high accuracy of its sensor (some reach one quarter of a million) can also test the coefficient of friction.
6, the main configuration of the product machinery.
Transmission, there are 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.
Screw, the tension precision measurement has a decisive role. The general ones are ball screw, trapezoidal screw, and general screw. Among them, ball screw has the highest accuracy, but its performance can only be played by the operation of computer servo system, and the whole set is more expensive. Using general screw and trapezoidal screw can achieve the accuracy required by flexible packaging, i.e. 0.5-1% accuracy. Transmission, there are gear transmission and chain transmission, the former is expensive and used for high precision; the latter is cheap and used for low precision.
Sensor, the main cost is the life, photoelectric induction is one of the more advanced technology, generally available for more than 100,000 times, imports and some domestic joint venture manufacturers can reach better technology is Shanghai QINSUN Instruments Co.
7, test speed.
Some of the market equipment in 10 ~ 500 mm / min, some in 0.001 ~ 500 mm / min, the former generally use ordinary speed control system, lower cost, rough impact on accuracy; the latter use of servo systems, expensive, high precision, for flexible packaging enterprises, the choice of servo systems, speed range 1 ~ 500 mm / min is sufficient, so that neither affect the accuracy, price and within a reasonable range.
8, measurement accuracy.
Accuracy issues, including force accuracy, speed accuracy, deformation accuracy, displacement accuracy. These accuracy values can reach up to plus or minus 0.5, but for general manufacturers, to achieve 1% accuracy is enough. In addition, the resolution of force value can almost reach 100,000 parts of the tension machine.
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