QC/T 710-2004Test method for compression load of automotive weatherstrips (English PDF)

1 Scope

This Standard specifies the test method of compression load for automobile weather-strips.

This Standard applies to the test of compression load for automobile weather-strips.

2 Normative references

The terms in the following documents become the terms of this Standard by reference to this Standard. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this Standard. However, parties to agreements that are based on this Standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this Standard.

GB/T 2941, Standard temperature, humidity and time for environmental regulation and testing of rubber samples (eqv ISO 471:1983)

HG/T 2369, Rubber and plastic tensile testing machine technical conditions

GB/T 8170, Rules of rounding off of numerical values

3 Definition

4 Instruments and apparatuses

5 Sample and state adjustment

5.1 Except for special requirements, three samples of length 100 mm ± 2 mm shall be taken from the finished products respectively.

5.2 The time interval between the sample and vulcanization and the adjustment of the sample before the test shall be carried out in accordance with the provisions of GB/T 2941.

5.3 Before the test, the sample shall be parked for at least 3 hours in an environment where the temperature is (23 ± 2) °C and the relative humidity is (50 ± 5) %. The sample shall not be pressurized during the parking period.

6 Test steps

6.1 According to the product test requirements, select the test mode, set the test speed, compression height and other parameters. Except for special provisions of the product, the test speed is set to 30 mm/min. 30% of the height of the sealing part can be used as the reference compression displacement height.

6.2 Install the upper and lower toolings on the tensile tester; during installation, the load line that is applied in the test shall match the centerline of the sample.

6.3 During measurement, the upper plane of the lower test tooling or the upper end of the flange is usually used as the compression displacement reference (see Figure 1).

6.4 Install the sample and start the test machine. Use the pressing board to compress the sample to a predetermined height at a specified speed; record the relationship between the compression load and the deformation.

7 Test result expression

Take the arithmetic mean of all the test data as the test result; round the calculation result to one decimal place according to GB/T 8170.

8 Test report

The test report shall contain the following contents:

a) test name, number;

b) number of this Standard;

c) source of the sample;

d) test conditions: compression speed, compression height and other relevant parameters;

e) device name and number;

f) indicator value;

g) test result;

h) tester and date.