"Determination of linear dimensions of foam plastics and rubber GB T 6342-1996" is a Chinese national standard, which stipulates the linear size determination method of foam plastics and rubber products. Linear dimensions refer to the linear dimensions of an object in three-dimensional space, such as length, width, and height. The purpose of this standard is to ensure accurate and reliable determination of the linear dimensions of foam and rubber products to meet the needs of product design, manufacturing and quality control. The following is an introduction to the GB T 6342-1996 standard, including the main content of the standard and the general steps for linear dimensioning.
The main content of the standard:
The GB T 6342-1996 standard mainly includes the following:
1.Scope: Defined standards for linear dimensional determination of foam and rubber articles.
2.Terms and Definitions: Terms and definitions used in this standard are provided to ensure consistency and accuracy during measurements.
3.Instruments and equipment: Specifies the instruments and equipment that need to be used for linear dimensioning, including but not limited to vernier calipers, rulers, gauges, etc.
4.Specimen preparation: Requirements are put forward for specimen selection, preparation and handling to ensure the reproducibility and comparability of the test.
5.Determination Procedure: The linear dimension determination procedure is described in detail, including the specific operation method using the instrument.
6.Recording and reporting of assays: Recording and reporting of assay results are required to ensure the accuracy and traceability of assay data.
General steps for linear dimensioning:
1.Specimen preparation: According to the requirements of the standard, select the specimen that meets the specified size and shape to ensure that the specimen surface is flat and there are no obvious defects.
2.Instrument calibration: Calibrate the measuring instruments used, such as vernier calipers, to ensure their accuracy and sensitivity.
3.Measurement position: Select the measurement position on the specimen, and determine the linear dimensions such as length, width, and height of the specimen at this position.
4.Instrument operation: Use the instrument to make the measurement, ensure that the measuring knife edge of the instrument is perpendicular to the surface of the specimen, and maintain a gentle operation to prevent damage to the specimen.
5.Multiple measurements: Multiple measurements are performed at the same location to improve the accuracy and reliability of the measurement results.
6.Data Logging: Record the linear dimensional data obtained from the measurement and indicate the location of the measurement.
7.Data processing: Measurement data is processed, such as calculating averages, to obtain more reliable linear dimensional results.
8.Report: The results of the measurement are recorded in detail in the report, including sample information, measurement data, information on instruments and equipment used, etc., for future review and traceability.
Notes:1Specimen selection: Select specimens that meet the requirements of the standard to ensure that the specimens are representative.
2.Use of the instrument: The selection and use of the instrument should be in accordance with the standard and require regular calibration and maintenance.
3.Operation skills: When performing the measurement, it is necessary to operate gently to prevent damage to the specimen due to excessive force.
4.Environmental conditions: The assay should be performed under appropriate environmental conditions to ensure the accuracy of the assay results.
By following the requirements of GB T 6342-1996 standard, linear dimensional determination of foam and rubber products can ensure the accuracy and reliability of the measurement results, and provide a scientific basis for product design, production and quality control.