1、 WORLDWIDE ENGINEERING STANDARDS General Specification GMW14169 Requirements for Dense Elastomeric Body Seals Copyright 2012 General Motors Company All Rights Reserved May 2012 Originating Department: North American Engineering Standards Page 1 of 9 1 Introduction Note: Nothing in this standard supe
2、rcedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Scope. This standard covers the requirements of dense elastomeric rubber seals attached to a solid carrier used in sealing body openings.
3、1.2 Mission/Theme. Not applicable. 1.3 Classification. 1.3.1 Material Description. The bulb or sealing portion of the weatherstrips shall be made from ethylene propylene diene monomer (EPDM) or thermoplastic elastomer (TPE). The specifications for the carrier shall be specified on the engineering pa
4、rt drawing or in the math data file. Weatherstrip assemblies shall consist of continuous extruded sections or sections joined together. These sections shall be joined by either transfer or injection molded joints, or mitered joints securely attached with suitable adhesive. Joint offsets in visible a
5、nd sealed areas shall be less than or equal to 0.25 mm. 1.3.2 Coatings. When applied, coatings shall be non-abrasive and uniform in color, finish, and texture. Coatings must meet the requirements of color and gloss as established by GM Appearance Engineering. 1.3.3 Typical Applications. Typical appl
6、ications include the following: sealing profiles in the body area, e.g., rocker seals, cutline seals. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 37 ISO 868 ISO 4892 ISO 23529 ISO 48 ISO 1431-1 ISO 7500-1
7、 SAE J2527 ISO 188 ISO 3865 ISO 9513 2.2 GM Standards/Specifications. GMW3059 GMW14650 GMW14757 GMW15564 GMW14162 GMW14685 GMW15379 GMW16317 GMW14170 GMW14711 GMW15382 GMW16321 GMW14294 GMW14712 2.3 Additional References. Weatherstrip Component Technical Specification - CG1019 3 Test Preparation and
8、 Evaluation 3.1 Resources. 3.1.1 Calibration. The test 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. 3.1.3 Facilities. Facilities shall conform to the relevant Test Pro
9、cedures. 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 ENGINEERING STANDARDS GMW14169 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 2
10、of 9 3.1.4 Equipment. Equipment shall conform to the relevant Test Procedures and to the test sketches on the part drawings. 3.1.4.1 Test Machine. The test machine shall fulfill the following requirements: The force-measuring device of the test machine shall correspond to ISO 7500-1 Class 1; the def
11、lection measuring device shall correspond to ISO 9513 Class 0.2. The test machine shall be such that the required test velocity can be maintained. 3.1.5 Test Vehicle/Test Piece/Test Samples. Unless otherwise specified, the shape, size and number of test pieces shall be in accordance with the relevan
12、t Test Procedure. For Design and Product Validation, test pieces shall be cut from at least three finished parts and for Routine Quality Control from at least one finished part. Reference Appendix A, Table A1. If straight test pieces cannot be obtained from the finished parts in appropriate length,
13、straight samples from the same manufacturing batch shall be delivered unsolicited. The number of test pieces required for material and component approval is defined in the Weatherstrip Component Technical Specification (CG1019). 3.1.6 Test Time. Not applicable. 3.1.7 Test Required Information. Not a
14、pplicable. 3.1.8 Personnel/Skills. Not applicable. 3.2 Preparation. Not applicable. 3.3 Conditions. 3.3.1 Environmental Conditions. The minimum time between vulcanization and testing of elastomers shall be 72 h. The test pieces shall be maintained at a temperature of 23 C 5 C for at least 8 h prior
15、to test and shall be free from strain during this period. 3.4 Instructions. Not applicable. 3.5 Data. Not applicable. 3.6 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
16、 the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 3.7 Documentation. Samples of components or material released to this standard shall be tested for conformity with the require
17、ments of this standard and approved by the responsible GM Department (GM Product Engineering, Materials Engineering, Appearance Engineering, and/or Validation Engineering) prior to the start of delivery of production level components or materials. Any change to the component or material, e.g., desig
18、n, function, properties, manufacturing process and/or location of manufacture requires a new release of the product. It is the sole responsibility of the supplier to provide the customer, unsolicited, with documentation of any change or modification to the product/process, and to apply for a new rel
19、ease. If not otherwise agreed to by the Weatherstrip Global Subsystem Leadership Team (GSSLT) or GM Weatherstrip Engineer, the entire verification test shall be repeated and documented by the supplier prior to start of delivery of the modified or changed product. In some cases a shorter test can be
20、agreed to between the responsible GM Department and the supplier. 3.7.1 Test Results. With reference to this standard the test results shall be presented in a test report. 3.7.2 Deviations from this Standard. Any deviations from the requirements of this standard shall have prior approval from the We
21、atherstrip GSSLT. Such requirements shall be specified on component drawings, test certificates, reports, etc. 3.8 Dimensions and Tolerances. Dimensions and tolerances shall be specified on the engineering part drawing. If no tolerances are specified on the drawing, the tolerances and datums specifi
22、ed in Appendix F7 of the SOR shall apply. 3.9 Installation Properties. For handling and requirements see relevant part drawing or Master Process Document (MPD). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permi
23、tted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14169 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 3 of 9 4 Requirements and Procedure 4.1 Appearance. Surfaces shall be smooth and free from voids, bubbles, and hard spots. The parts shall be free of
24、mold release, bloom, or any other defects which may be deleterious to the appearance or sealing action. 4.1.1 Appearance Attributes. Appearance attributes, such as color, grain, and gloss, shall be as specified by GM Studio Color and Appearance. 4.1.2 Blemish Requirements. All weatherstrips shall me
25、et the engineering drawing or math data file for the blemish requirements. 4.1.3 Carriers. Metal carriers/reinforcements must be specified on the drawing and in the math data file. Carriers must not be visible (i.e., must be coated or over molded). Molded joint offsets in visible areas and on seal s
26、urfaces must be less than or equal to 0.25 mm. 4.2 Performance Requirements (See Table 1 and Table 2). If a seal consists of several sections/profiles (extrusions and/or molds), the specified tests shall be conducted on each section (each extrusion section and each mold section). Unless otherwise st
27、ated, the tests and evaluations shall be performed at the temperature of 23 C 5 C. 4.2.1 Prior to submission of finished parts, the supplier shall submit required test data for material approval on sheet stock tested to Table 1 with the required number of samples per the Weatherstrip Component Techn
28、ical Specification (CG1019). Samples are to be taken from finished parts for all tests other than material approval and release. Table 1: Material Requirements for Sheet Stock and Finished Components Property Test Procedure Unit Value 4.2.1.1 Hardness EPDM ISO 48 Method M IRHD See part drawing TPE a
29、nd PVC ISO 868, 15 s delay Shore A See part drawing 4.2.1.2 Elongation at Break All types ISO 37, Type 2 or 4 dumbbell, 200 mm 20 mm/minute % 200 minimum 4.2.1.3 Tensile Strength Dense materials with volume resistivity 106 cm minimum ISO 37, Type 2 or 4 dumbbell, 200 mm 20 mm/minute MPa 5 minimum 4.
30、2.1.4 Age Resistance (Heat Aging) All types ISO 188 Method B, 168 (+0/-2) h at 100 C 3 C Change of hardness Change in tensile strength Change in elongation at break IRHD/Shore A % % +10 maximum 30 maximum -50 maximum 4.2.1.5 Ozone Resistance All types ISO 1431-1, 100 pphm 10 pphm, straight sample, 2
31、0% strain, 40 C 2 C, 72 (+0/-2) h. Test piece: length 100 mm 1 mm , width 4 mm 1 mm, thickness 1 mm to 2 mm. Visual Examination, 2X magnification. No cracks Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted
32、 without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14169 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 4 of 9 Property Test Procedure Unit Value 4.2.1.6 Paint Staining Note 1 All elastomers in contact with painted substrate ISO 3865 Method A, 24 (+0/-2) h a
33、t 80 C 3 C, using production representative painted panels. Basecoat shall be white. To develop latent stain, the panels shall be exposed to UV following the heat exposure. Either: UV exposure 4 h .5 h at 13 W/m2 2 W/m2 or: GMW14162/B/4 MJ/m2 minimum. For profiles with permanent contact to the body.
34、 For profiles when contact area is visible. No migration stain permissible; contact stain permissible. No staining permissible 4.2.1.7 Cold Flexibility All types Condition per ISO 23529, -40 C 3 C; 22 (-0/+2) h, then bend around mandrel. Test piece: length 100 mm 1 mm , width 4 mm 1 mm, thickness 1
35、mm to 2 mm. Bend 180 around radius of 1 mm. Visual Examination. No cracks 4.2.1.8 Volume Resistivity Note 2 All dense elastomeric parts in contact to painted steel in the rocker and wheelhouse area GMW14711 cm 106 minimum All other dense elastomeric parts in contact to painted steel in the outer bod
36、y area GMW14711 cm 104 minimum All dense elastomeric parts in contact with painted non-steel metal substrates (i.e., aluminum, magnesium) in the rocker, wheelhouse, and primary seal area GMW14711 cm 106 minimum 4.2.1.9 Bloom All types Design Validation (DV) Testing GMW16317 Method B Visual examinati
37、on. No adverse changes, no whitening All types Product Validation (PV) Testing GMW16317 Method C1 or C2 Visual examination. No adverse changes, no whitening Note 1: Painted panels must be stored at -30 C 3 C until usage. Note 2: See Weatherstrip Component Technical Spec (CG 1019) for resistivity req
38、uirements by part. Table 2: Component Requirements Property Test Procedure Unit Value 4.2.1.10 Compression Load Deflection All types GMW14685-2B2 Compression Load Deflection (CLD) is determined at 23 C 5 C See curve on part drawing or math data file Copyright General Motors Company Provided by IHS u
39、nder license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14169 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 5 of 9 Property Test Procedure Unit Value 4.2.1.11 Long Term
40、Load Loss Set Primary, decklid and liftgate, hood seals GMW15564, Load Loss Set (LLS) to be measured at minimum and maximum compression LLS after 360 (+0/-2) h at 80 C 3 C % LSS N/100 mm 1.5 minimum To be reported Secondary and auxiliary seals GMW15564, LLS to be measured at minimum and maximum comp
41、ression LLS after 360 (+0/-2) h at 80 C 3 C % LSS N/100 mm 0.2 N minimum To be reported 4.2.1.12 Age Resistance All types Heat age per ISO 188 Method B, 72 (+0/-2) h at 80 C 3 C, weatherstrip compressed to nominal compression Compression Load Deflection at 23 C 5 C See curve on part drawing or math
42、data file 4.2.1.13 Resistance to Adhesion to Glass, Paint, or other Mating Materials Side closure seals GMW14757 Method A dry and wet (tap water) conditions N 4 maximum no transfer of rubber or coating to the glass, painted panel, or other mating substrate material Front and rear closure seals GMW14
43、757 Method A dry and wet (tap water) conditions N 10 maximum no transfer of rubber or coating to the glass, painted panel, or other mating substrate material 4.2.1.14 Adhesion of Interior Walls All types GMW14757 Method B No sticking 4.2.1.15 Tear-off Force between Carrier and Seal (Separation of Bu
44、lb from the Carrier) All types Test piece: Section of 50 mm 1 mm length. Insert rod through bulb. For profiles with multiple bulbs, the rod shall be inserted into the bulb nearest the carrier. The rod must fill 70% to 90% of the bulb cavity, unless otherwise specified, and must not distort the bulb
45、shape. Clamp carrier securely. Pull rod at a speed of 50 mm 5 mm/minute, perpendicular to the carrier. N 150 minimum or bulb tear (cohesive failure) 4.2.1.16 Insertion/Extraction Note 1 All types GMW14712, thickness of blade(s) shall be specified on drawing unless otherwise specified: insertion Forc
46、e, open carrier extraction Force, open carrier extraction Force, closed carrier (parallel carrier legs). Crimped carrier extraction must meet SSTS requirements. N N N 20 maximum 15 minimum 65 minimum 4.2.1.17 Squeak and Itch Testing All types GMW16321 Sones 3.0 maximum Copyright General Motors Compa
47、ny Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14169 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 6 of 9 Property Test Procedure Unit Value
48、 4.2.1.18 Resistance to Protective Wax Remover All profiles used in outer body area GMW14294 The elastomer profile shall show no waviness. 4.2.1.19 Freezing Characteristics of Weatherstrips Side closure seals GMW15379 Method A N 15 maximum Front and rear closure seals GMW15379 Method A N 55 maximum
49、4.2.1.20 Weatherometer All parts with direct or indirect exposure to sunlight GMW14650, Weather-Ometer (Xenon Arc) Resistance. See Weatherstrip Component Technical Specification (CG1019) for required exposures by part. A minimum of five samples shall be placed in the weather-ometer such that samples shall be pulled, evaluated (visual inspection and E calc
