Common test methods of the hottest international t

2022-08-18
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Common test methods for international transportation packaging

now many excellent international enterprises have a set of relatively scientific and strict standards for the inspection of transportation packaging. The tests conducted by skytest on transportation packaging are based on the current advanced and general international standards. These standard tests are usually reflected in design guidance test, transportation routine test, environmental transportation test and other tests:

first, design guidance test

the purpose of design guidance test is mainly to test the product performance and the basis test of packaging design. This test can reflect the product performance and easily damaged parts through scientific data, and can be made up and improved in packaging design. It can be comprehensively investigated through frequency sweep test and impact fragility test

1. Sweep frequency test the quality of the electronic universal tensile machine determines the 1-CUT test method. Refer to astmd3580

to carry out sweep frequency test on the tested object. The product can be carried out separately without packaging and with packaging. Focus on the frequency response of important parts of the sample. By installing sensors on important parts and drawing graphics, the resonance frequency of this part can be analyzed, The frequency range of sweep frequency can be 2Hz ~ 200Hz ~ 2Hz, and the sweep frequency with input acceleration of 0.5g. After the resonance frequency is obtained, the input acceleration can be further increased, and then the original acceleration of 2 times (1.0g) can be input under this resonance frequency to vibrate for 5 minutes

2. The test method of impact fragility test refers to astm3332

the test product does not need packaging. Through the inspection of the impact fragility of the product, we can further find the weaknesses and defects of the product, understand the characteristics of the product, improve the internal quality of the product, and provide an important theoretical basis for packaging design. According to the requirements in the design specification of household electrical appliances, Tiance can stipulate that its products need to withstand the test with a speed change rate of more than 170cm/s and a shock square wave acceleration of more than 36g under the half sine wave

the above two tests should be carried out at the initial stage of design. If any problem is found that cannot pass the test, it should be improved immediately from the two aspects of product and packaging. Don't wait for the product to be finalized and make changes. At that time, the design cost will be huge

II. Product overall transportation test

we should determine the corresponding test plan according to the product sales destination and the product logistics environment, extract and formulate the corresponding transportation test standard of the enterprise. This standard should meet the quality requirements and transportation requirements of foreign enterprises, and run through the final acceptance standard of product development and modification, Thus, the products should be intact when they are sold and circulated to the end users, and the proportion of damage caused by transportation should be controlled within a very small range

the specific implementation scheme is as follows:

first of all, we can classify products according to their weight. Those weighing more than 50 kg and less than 50 kg should be investigated separately, because according to statistics and relevant foreign transportation test standard weights, different products will be damaged in different degrees, and the ways of damage will be different, so it is necessary to classify. In addition, the product transportation standards should be representative, adapt to the requirements of the international logistics environment, and meet the requirements of foreign mechanical handling

1. Small products <50kg

the test plan should include storage test, mechanical handling test, vehicle transportation vibration test, air transportation vibration test, rollover test and drop test. Four samples shall be provided for the test to complete all tests

a. for the test method of storage stacking test, refer to astmd-642

the calculation of load: l = w  H-1  f formula, l is the bearing capacity, W: the weight of a single product, H: the number of layers of products allowed to be stacked, F: deterioration coefficient. And specify the initial pressure of single corrugated 222n, double corrugated 445n and three corrugated 2220n. At the same time, it can also be stipulated that the total deformation of the package is less than 20mm. If the deformation exceeds the standard, it indicates that the overall compression resistance of the package is weak. The empty box compression resistance index of the carton should be strengthened or the support should be added inside

b. Refer to astmd-6055 for the test method of mechanical handling test.

because it is very common to carry out mechanical handling through the extrusion and clamping of forklifts abroad. This test is to put pressure on the front, rear, left and right directions of the product. Can the product know where the fatigue testing machine is commonly used? The maximum pressure should not be less than 800 kg. It should be done 10 times in each direction

c. refer to astmd-4728

for the test method of vehicle vibration test. This test method adopts foreign highway spectrum for random vibration. This vibration test method is to truly reflect the situation of products in highway transportation. Products are stacked together for random vibration test. It is recommended to choose 0.73grms vibration for 1 hour

d. Refer to astmd-4728

for the test method of air transportation vibration test. Foreign express companies are very developed. They are responsible for quickly delivering the products purchased by customers on the Internet to customers' homes. They mainly rely on logistics equipment such as air transportation, but the vibration of air transportation and road transportation is different, and the vibration frequency it produces is high, Therefore, it is recommended to choose 1.06grms vibration for 30 minutes

e. refer to astm6197 for the test method of tipping impact test. The impact directions of tipping impact test are the front, rear, left and right directions of the sample

f. refer to astm5276 for drop test. Drop is a common damage mode in transportation, and it is also relatively easy to cause product damage. Falling is inevitable, so we should pay more attention

drop times 10 times; Falling position: one corner, three ridges and six sides

single product weight (LBS) drop height (in)

w <2030

20

40

60

100

g, function and appearance inspection

for household appliances, it should be carried out: high voltage resistance test, leakage current test, insulation resistance, function inspection, appearance inspection Noise, etc

including the digital display period before PC software. 2. Large Products> 50kg

the test plan should include storage test, mechanical handling test, impact test, vehicle transportation vibration, which are the basic dynamic test, overturn test and drop test to promote the innovation and development of enterprises. The test is the same as that of small products. Four samples are required to complete all tests

a, storage and stacking test (ibid.)

b, clamping machinery handling test (ibid.)

c, vehicle vibration test (ibid.)

d, impact test reference standard astmd880

impact test mainly simulates the impact on the front, rear, left and right directions of the sample under the conditions of car brakes, railway freight car formation hooks, etc. The impact speed with the end impact speed greater than 0.7m/s can be selected

e. reference standard for tipping test astm6179

tipping test can choose a certain angle, and the test method of placing the sample at this angle to make it freely impact the bottom (or side). The sample shall have the ability to resist the impact damage caused by dumping

f, reference standard for drop test astmd-5276

due to the large weight of the sample, the possibility of top surface and side surface falling is relatively small, so the falling parts of 1 bottom corner, 4 bottom edges and 1 bottom surface can be selected for the drop, and the drop height can be 200mm

g, function and appearance inspection (ibid.)

III. environmental transportation test

(I) high temperature transportation test

1. Store the samples within 55 ℃ for 7 days

2. Conduct vehicle random vibration test immediately

3. Immediately return to 55 ℃ environment for 8h

4. Immediate impact test

5. Immediate drop test

(II). Cold transport test

1. Store the sample at - 28 ℃ for 24h

2. Conduct vehicle vibration test immediately

3. Immediately return to - 28 ℃ environment for 8h

4. Immediate impact test

5. Immediate drop test

IV. before carrying out the relevant testing process, it also reminds enterprises of some details that should be paid attention to when sending for inspection, transportation and packaging:

1. Carefully check before the test

2. It is recommended to replace the outer packaging and cushioning materials of the product before the test

3. Prepare sufficient test samples and spare parts

4. Prepare necessary on-site improvement methods and means

source: newmaker

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