Basic test of the hottest packaging transportation

Basic test of packaging and transportation packages

national standard of the people's Republic of China

gb/t 4857

replaces gb/t 4857

Basic test of packaging and transportation packages

Part 7: sinusoidal constant frequency vibration test method

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(ISO 2247:2000, MOD)

release and implementation

General Administration of quality supervision, inspection and Quarantine of the people's Republic of China

China National Standardization Administration release

gb/t 4857

gb/t 4857 "Basic test of packaging and transportation packages" is divided into 23 parts:

- Part 1: marking methods of various parts during the test

- Part 2: temperature and humidity at this time, the number of experimental pieces is represented by "pieces" and "batches" for conditioning treatment

- Part 3: static load stacking test method

- Part 4: pressure test method

- Part 5: drop test method

- Part 6: rolling test method

- Part 7: sinusoidal constant frequency vibration test method

- Part 8: hexagonal roller test method

- Part 9: spray test method

- Part 10: sinusoidal frequency conversion vibration test method

- Part n: horizontal impact test method

- Part 12: immersion test method

- Part 13: low pressure test method

- Part 14: tipping test method

- Part 15: controllable horizontal impact test method

- Part 16: stacking test method using pressure testing machine

- Part 17: General principles of preparing performance test program

- Part 18: preparation of quantitative data of performance test program

- Part 19: circulation test information record

- Part 20: crash test methods

- Part 21: mould proof test method

- Part 22: unit cargo stability test method

- Part 23: random vibration test method

this part is part 7 of gb/t 4857. The standard of ISO 2247:2000 "packaging - complete and full transport packaging and unit goods - Fixed low frequency vibration test" is adopted to modify this part Compared with ISO 2247 standard, the revision of "sinusoidal constant frequency vibration test method for packaging and transportation packages" has the following main differences: 3. It has good weather resistance

- according to the habits of Chinese users, the name of the original standard is retained, which is different from the name of the international standard

- some layout formats have been modified according to Chinese habits

- relevant explanatory notes are deleted

- since China has defined relevant terms in the packaging terminology standard, the content of relevant term definitions has been cancelled

- - the requirements for "temperature and humidity conditions during test" are relaxed compared with ISO standards

- according to the unified format and actual situation of China's gb/t 4857 series standards, the relevant contents of the test report have been modified

compared with gb/t 4857.7 -1992, the main changes in this part are as follows:

- in the scope, the original only applicable to transport packages are modified to apply to transport packages and unit goods

- modify the original height difference index to the angle change index in the requirements for the table surface of the vibrating table

- provisions for test instruments are added

- Appendix A is added for users to choose peak acceleration

GB/T 4857.

Appendix A of this part is informative

this part will replace gb/t4857 from the date of implementation

this part is proposed and under the jurisdiction of the national packaging Standardization Technical Committee

the main drafting units of this part: China machinery productivity promotion center, Suzhou Test Instrument General Factory, national packaging product quality supervision and inspection center

(Jinan)

the main drafters of this part: Huang Xue, Zhou Peng, Zhang Xiaojian, Xu Liyi, Li Zian

GB/T 4857.

packaging basic tests of transport packages

Part 7: sinusoidal constant frequency vibration test method

scope:

gb/t 4857 this part stipulates the comprehensive inspection quality of transport! Main performance requirements, test procedures and contents of test report of equipment used for sinusoidal constant frequency vibration test of transport packages and unit goods

this part is applicable to evaluate the strength of transportation packages and unit goods under sinusoidal constant frequency vibration and the protection ability of packages to their contents. It can be used not only as a single test, but also as a part of a series of tests

normative references the terms in the following documents become the terms of this part through the reference of this part of gb/t 4857. For dated references, all subsequent amendments (excluding Corrigendum) or revised versions of these documents are not applicable to this part. However, parties to agreements based on this part are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition is applicable to this part

gb/t 4857.1 marking method of various parts of packaging and transportation packages

gb/t 4857.2 temperature and humidity adjustment treatment of packaging and transportation packages

gb/t 4857.3 static load stacking test method of packaging and transportation packages

gb/T 4857.37 general principle of performance test outline of packaging and transportation packages

gb/T 4857.18 FQ quantitative data of performance test outline of packaging and transportation packages

test principle

will be tested The sample is placed on the shaking table and vibrated by using an approximate fixed low-frequency sinusoidal oscillation. The temperature and humidity conditions during the test, the characteristics of the test duration and the applicable special time of the environment, the maximum acceleration, the placing state of the test sample and the fixing method are all predetermined

if necessary, a certain load can be added to the test sample to simulate the sinusoidal vibration environment when the transportation package is at the bottom of the stack

test equipment

4.1 vibration table

the vibration table should have sufficient size, sufficient strength, stiffness and bearing capacity. The structure shall ensure that the table top of the vibration table remains horizontal during vibration. The lowest resonance frequency shall be higher than the highest test frequency. The vibration table should be placed horizontally, and the maximum angle change from the horizontal is 0 300。 The shaking table can be equipped with:

a) low frame: to prevent the test sample from moving to both ends and sides during the test

b) high girth frame or other devices: to prevent the displacement of the load imposed on the test sample when it vibrates

c) a device used to simulate the fixing method of packages in transportation

in addition, the vibration table shall meet the requirements specified in article 5.6.3

4.2 instrument

the test instrument shall include accelerometer, pulse signal regulator and data display or storage device to measure and control the acceleration value on the surface of the test sample. The response of the test instrument system shall be accurate to 5% of the frequency range specified in the test

note: it can also be equipped with instruments to monitor the response of packaging containers and contents. Sensors can be used to record the vibration rate, amplitude and frequency of the contents related to the forced vibration of the vibrating table or the possible vibration on the outer surface of the package

gb/t 4857

5 test procedure

5 1 Preparation of test samples

prepare test samples according to the provisions of GB/t 4857.17

5.2 number of each part of the test sample

number each part of the test sample according to the provisions of GB/t 4857.1

5.3 pretreatment of test samples according to the provisions of GB/t 4857.2, select a condition to pretreat the test samples with temperature and humidity

5.4 the temperature and humidity conditions during the test should be carried out under the same temperature and humidity conditions as the pretreatment. If the pretreatment conditions cannot be reached, the test must be started within 5 minutes after the test sample leaves the pretreatment conditions

5.5 selection of test strength value

select the test strength value according to the provisions of GB/t 4857.18

5.6 test steps

5.6 1 record the temperature and humidity of the test site

5.6.2 place the test sample on the shaking table according to the predetermined state, and the vertical position of the center of gravity of the test sample should be as close to the geometric center of the shaking table as possible. If the test sample is not fixed on the table, a fence can be used. If necessary, the load can be added to the test sample, and the loading procedure shall comply with gb/t 4857 3

56.3 method a

5.6.3 1 operate the vibration table, and the optional range is. 5g and 1 Acceleration between 0 g, and make the test sample not separate from the table

5.6.3.2 select the displacement between certain (positive and negative) peaks (see Figure a.1 in Appendix A), and determine the test frequency within the corresponding frequency range, which is generated in The acceleration value between 5 g and 1.0 g shall be tested

5.6.4 method b

5.6.4 1 operate the shaking table to generate an optional range of acceleration, which can separate the test sample from the table and cause relative impact

5.6.4.2 select the predetermined amplitude, start to make the test sample vibrate at the frequency of 2 Hz, and gradually increase the frequency until the test sample is about to be separated from the shaking table

note: during the test, move 1.5 m m to 3 along the bottom of the test sample. The standard measuring tool with a thickness of mm and a minimum width of 50m is at least one-third of the bottom area of the test sample. The standard measuring tool can be inserted, that is, it is considered that the test sample is separated from the shaking table. 5.6.5 after the test, check the damage of the package and contents according to the relevant standards, and analyze the test

6 test report

the test report should include the following:

a) explain that the test is carried out according to this part

b) name, specification, model, quantity, etc. of the contents; If the simulated interior is used, it should be explained in detail

c) number of test samples

d) specify the name, size, structure and material specification of the packaging container, accessories, cushioning pads, supports, fixing methods, sealing, binding status and other protective measures

e) mass of test sample and contents, in kilograms

f) description of test equipment

9) fixation measures, whether low girth frame or high girth frame is used

h) whether the load is added. If the load is added, indicate the mass of the loaded load (in kilograms) and the duration of the load borne by the test sample

gb/t 4857.7- 2005

1) the state of the test sample during the test

j) temperature and humidity conditions and time of pretreatment

k) temperature and relative humidity of the test site

1) vibration direction, amplitude, frequency and test duration of the shaking table

m) test results: any phenomenon observed that can help to correctly interpret the test results should be recorded in detail

n) test method used (method a or method B), analysis of test results

o) explain the difference between the test method used and this part

p) test date, signature of test personnel and seal of test unit

GB/T 4857.

appendix a

(informative appendix)

determination of test intensity value

a.1 during the test, the relationship between amplitude, peak acceleration and vibration frequency can be determined in Figure a.1

source of information: