1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16998 Dust-Out From Fiber Sound Absorber Pad Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 1 of 3 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict betwe
2、en the English and domestic language, the English language shall take precedence. 1.1 Purpose. This procedure describes a method for measurement of dust-out from fiber sound absorber pad. It applies to both needled and resin-bonded constructions and to unfaced as well as coated and film-covered mate
3、rials. 1.2 Foreword. Not applicable. 1.3 Applicability. This procedure is intended for use in assembly plants and/or production quality control. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 17025 ISO/TS 16
4、949 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Facilities. Facilities must be certified to ISO 17025 and/or certified to ISO/TS 16949 and be acceptable to the responsible GM department. Supplier shall submit a letter of compliance. 3.1.1 Calibration. The te
5、st facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their phys
6、ical definition. 3.2 Equipment. 3.2.1 Cutting dye, 50 mm x 50 mm. 3.2.2 Cutting press. 3.2.3 Coated metal can with lid. 3.2.4 Air-circulating oven. 3.2.5 Balance that weighs in grams. 3.2.6 Low-pressure air line with nozzle opening 5 mm 0.5 mm. 3.2.7 Isopropyl alcohol. 3.2.8 Lint-free cloth. 3.3 Tes
7、t Vehicle/Test Piece. 3.3.1 Cut four (4) specimens using cutting press and cutting dye to 50 mm x 50 mm. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERI
8、NG STANDARDS GMW16998 Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 2 of 3 Note: Do not disturb or remove any loose fibers or dust from samples after cutting. 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not appli
9、cable. 4 Procedure 4.1 Preparation. 4.1.1 Place the four (4) test specimens in an air-circulating oven at 100 C for 1 h. 4.1.2 After 1 h at 100 C, remove specimens and immediately weigh each specimen to the nearest 0.01 g. 4.1.3 Moisten lint-free cloth with alcohol and wipe the inside of the metal c
10、an. Allow can to dry for 15 minutes. 4.1.4 Place four (4) specimens in the can and seal with lid. 4.1.5 Shake the can 150 times 2 times within 60 s. 4.1.6 Remove the specimens from the can. Holding the low-pressure air nozzle about 200 mm from each of the specimens, gently blow all loose material fr
11、om the specimens. 4.1.7 Place the four (4) specimens in an air-circulating oven for 1 h at 100 C. 4.1.8 After 1 h at 100 C, remove specimens and weigh each to the nearest 0.01 g. 4.2 Conditions. 4.2.1 Environmental Conditions. Not applicable. 4.2.2 Test Conditions. Deviations from the requirements o
12、f this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.3 Instructions. Not applicable. 5 Data 5.1 Calculations. 5.1.1 Calculate the percent dust loss on each specimen per the following equation: 5.2 Interpretation o
13、f Results. Not applicable. 5.3 Test Documentation. Not applicable. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to es
14、tablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. GSSLT Global Subsystem Leadership Team ISO International Organization for Standardization I ni t i a
15、l W ei gh t F i na l W ei gh t% D ust = _ _ _ _ _ x 100 I ni t i al W ei ghtCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16998 Copyrig
16、ht 2013 General Motors Company All Rights Reserved September 2013 Page 3 of 3 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW16998 9 Release and Revisions This standard was originated in June 2013. It was first approved by the Trim Materi
17、als/Textiles/Leather/Foam Global Subsystem Leadership Team (GSSLT) in September 2013. It was first published in September 2013. Issue Publication Date Description (Organization) 1 SEP 2013 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
