From 7 aspects to choose the appropriate flexible packaging tension tester

Tension testerIt is a tensile test performance testing equipment, but not all tensile test machines are suitable for the performance testing of flexible packaging materials. According to the needs of flexible packaging, Jinan Hengsi Shanda Instrument Co., Ltd. has summarized the following7Comparison of aspects:

1. First, consider the need to test the tension range of the material.

The different tension range determines the different sensors used, which also determines the structure of the tension machine, but this item has little impact on the price (except for the gantry). For general flexible packaging manufacturers, the tension range is100Newton's is enough. Therefore, it is also decided to use a single-arm type. The corresponding structure to the single-arm type is a gate-type structure, which adapts to relatively large tension, such as one ton or more. Therefore, flexible packaging manufacturers are basically not available.

2. Issues of test itinerary.

According to the requirements of flexible packaging films, the stroke is600-800mmThat's fine. Material elongation exceeds1000%You can choose the itinerary1000Or1200mm.

3. Standard configuration issues.

Three basic configurations of intelligence: host, microcomputer, and printer. If the microcomputer has strong functions, you can print directly. In addition, it can also be equipped with a normal computer. With a computer, complex data analysis can be carried out, such as data editing, local amplification, and the report format can be adjusted, and statistical analysis of group styles can be carried out. If you use a computer, the manufacturer should add the corresponding control system.

4. Output result.

The output results of the test results can be set arbitrarily: force value, elongation, tensile strength, constant elongation, fixed elongation value, yield strength, elastic modulus, test force8item. This can be said to be a comprehensive result of the output when the microcomputer is operated. Products from some foreign manufacturers can generally output this8item. Some domestic manufacturers can export5-6Some manufacturers can only output three items: force value, average value and small value.

5. On the experimental projects that can be done.

Flexible packaging requirementsTension testerOne machine is multi-purpose, that is, it can be stretched, compressed, bending, tearing, shearing, on the basis of equipped with different fixtures,180peeling,90degree peel test. In addition to the above items, some tensile machines on the market can also test the friction coefficient because of their high sensor accuracy (some reaching three-tenths of a hundred thousand). Such as Shimazu, Japan, Landmark Beijing and other companies.

6. Main configuration of product machinery:

The transmission has lead screw transmission and rack transmission. The former is expensive, used for high accuracy and has high repeatability for tests; the latter is cheap, used for low accuracy and has low repeatability for tests. The lead screw has a decisive effect on the measurement of tension accuracy. Generally, there are ball screws, trapezoidal screws, and general screws. Among them, the accuracy of the ball screw, but its performance can only be achieved by operating the computer servo system, and the whole set is also relatively expensive. The use of general lead screws and trapezoidal lead screws can achieve the accuracy required by the flexible packaging, that is,0.5-1%Accuracy. Drives, with geared and chain drives, the former is expensive for high precision; the latter is cheap for low precision. The main cost of sensors lies in their lifespan. Photoelectric induction is the relatively advanced technology, which is generally available for more than 100,000 times, and can be achieved by import and some domestic joint venture manufacturers.

7. Test speed.

Some of the equipment on the market are available10~500 mm/minSome are there0.01~500 mm/minThe former generally uses a normal speed control system, which is low in cost and rough affects accuracy; the latter uses a servo system, which is expensive and has high accuracy. For flexible packaging companies, use a servo system and speed control range.1~500mm/minIt is enough, which does not affect the accuracy, and the price is within a reasonable range.

eight,Measurement accuracy.

Accuracy issues, including force measurement accuracy, speed accuracy, deformation accuracy, and displacement accuracy. These precision values ​​can reach positive and negative0.5. But for ordinary manufacturers,1%Accuracy is enough. In addition, the force value resolution can almost reach one in a hundred thousand.