Optional Electronic Tensile Testing Machine for Flexible Packaging

The purchase of electronic tensile testing machines in the overall construction plan of flexible packaging laboratory should be based on the needs of the film used, comprehensive consideration of performance, specifications, and comparisons from the following aspects:

First, we must first consider the need to test the material pull range.

The difference in the pull range determines the difference in the sensors used, which also determines the structure of the puller, but this has little effect on the price (except for the gate type). For general flexible packaging manufacturers, a tension range of 100 Newton is sufficient. Therefore, it is also decided to use a single arm type.
The structure corresponding to a single-arm type is a portal structure, which is adapted to a relatively large pulling force, such as one ton or more. Therefore, soft packaging manufacturers basically do not need.

Second, the problem of the test schedule.

According to the performance and requirements of the flexible packaging film, the stroke can be 600-800mm. Materials with an elongation of more than 1000% can be used with a stroke of 1000 or 1200mm.

Third, the standard configuration problem.

The three basic types of intelligent configuration: host computer, microcomputer, and printer. If the microcomputer is powerful, it can be directly printed. In addition can also be equipped with ordinary computers. With a computer, you can perform complex data analysis, such as data editing, local magnification, adjustable report formats, and statistical analysis of grouped patterns.
If equipped with a computer, the manufacturer should be added to the corresponding control system.

Fourth, the output results.

The output of the test results can be arbitrarily set: maximum force value, elongation, tensile strength, constant force elongation, constant tensile force, yield strength, elastic modulus, and maximum test force. This can be said to be the most comprehensive result of the output of the microcomputer. Some foreign manufacturers' products can generally output these 8 items. Some domestic manufacturers can output 5-6 items, and some manufacturers can only output the maximum force value, average value, and minimum value.

Fifth, in the experimental project can be done.

The flexible packaging requires a multi-purpose pull machine, that is, on the basis of different fixtures, it can perform tensile, compression, bending, tearing, shearing, 180 degree peeling, and 90 degree peel test.
There are some high-grade tensile machines on the market that, in addition to the above items, can be tested for their high sensor accuracy (some of which is up to 100,000). Such as Japan Shimadzu, Beijing Lande Meike and other companies.

Sixth, the main configuration of product machinery.

Transmission, screw drive and rack drive, the former is expensive, used for high precision, test repeatability is high; the latter is cheap, used for low accuracy, test repeatability is low.
Screws have a decisive effect on the accuracy of tension measurements. General ball screw, trapezoidal screw, general screw. Among them, the accuracy of the ball screw is the highest, but the performance of the ball screw depends on the operation of the computer servo system to play, the entire package price is also relatively expensive. The general screw and trapezoidal screw can be used to achieve the required precision of the flexible packaging, ie 0.5-1% accuracy.
Transmission, gear transmission and chain drive, the former is expensive, used for high precision; the latter is cheap, used for low precision.
The main cost of sensors is life. Photoelectric sensing is one of the more advanced technologies. Generally, it can be used more than 100,000 times. Imports and some domestic joint venture manufacturers can achieve it.

Seven, test speed.

Some of the equipment on the market are between 10~500 mm/min, and some are between 0.01~500 mm/min. The former generally use common speed control systems, which have lower cost and coarser influence on accuracy. The latter uses servo systems, which are expensive and have high precision. For flexible packaging companies, the use of servo systems, the speed range of 1 ~ 500mm/min is sufficient, so it does not affect the accuracy, the price is within a reasonable range.

Eight, measurement accuracy.

Accuracy problems include force measurement accuracy, speed accuracy, deformation accuracy, and displacement accuracy. These precision values ​​can reach up to plus or minus 0.5. But for general manufacturers, achieving 1% accuracy is sufficient. In addition, the force resolution can reach almost one in 100,000.
The above basic configuration is about 30,000 yuan. If the coefficient of friction is tested, the price will be around 40,000 yuan.