1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 10 13 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.5, 3.6 & 4 deleted 1995 07 19 Revised Updated para 4 to Performance Para K. Gerhards 1989 11 17 Released SM/EQ9859 TP K. Gerhards Printed copies are uncontrolled Copyright 2004, Ford
2、Global Technologies, LLC Page 1 of 4 CELLULAR ELASTOMER, GASKET WSK-M2D419-A 1. SCOPE This specification defines performance requirements for cellular elastomeric gasket based on natural or synthetic rubbers. 2. APPLICATION This specification was released originally for material used as gaskets for
3、front and rear signal lamps. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 TEST SPECIMEN 3.4.1 Compression Deflection (ASTM D 1056) Type 1 3.5
4、- 14.0 kPa Type 2 14.0 - 35.0 kPa Type 3 35.0 - 63.0 kPa Type 4 63.0 - 91.0 kPa Type 5 91.0 -119.0 kPa Type 6 119.0 -168.0 kPa The desired material type shall be defined on the Engineering Drawing. 3.4.2 Contact and Migration Staining (FLTM BP 153-01, Procedure A & B) Rating 3.4.2.1 No Migration Sta
5、ining 5 3.4.2.2 Slight Contact Staining 4 3.4.2.3 No Contact Staining 5 The desired requirement shall be defined on the Engineering Drawing. 3.4.3 Staining by Water Extractables (FLTM BP 153-02, Procedure A & B) No Staining Rating 5 ENGINEERING MATERIAL SPECIFICATIONWSK-M2D419-A Printed copies are u
6、ncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.4.4 Dimensional Stability Dimensional Change -5 to +1% Test Method: A specimen approx. 300 x 300 mm x thickness of actual part or a relevant section of molded part with skin shall be placed in a mechanical convection oven at 80
7、+/- 2 C for 3 h. Dimensional changes shall be measured after cooling down to room temperature. 3.4.5 Cold Flexibility No cracks or breaks Test Method: Three specimens approx. 150 x 25 mm x thickness of actual parts (or relevant sections of molded parts) with skin and a mandrel (40 mm in diameter) ar
8、e to be placed in a cold box at -40 +/- 1 C. After 6 h the samples are to be bent around the mandrel within one second. The tests are to be performed in the cold box. Examine in bent condition after conditioning to room temperature. 3.4.6 Ozone Resistance (FLTM BP 101-01, Procedure A) 3.4.6.1 Rating
9、 0 3.4.6.2 Rating 1, max 3.4.6.3 Rating 2, max The desired requirement shall be defined on the Engineering Drawing. 3.4.7 Water Absorption, max 5% (ASTM D 1056, expose specimen to 84 kPa vacuum) 3.4.8 Leakage Test Test Method: From test slabs in thickness of the finished part cut out rings with an i
10、nside diameter of 100 mm and an outside diameter of 120 mm. For molded parts relevant sections shall be used. The ring is to be cut into two equal parts. One part is to be placed between two glass plates of appropriate size. By use of spacers the specimen is to be compressed between the plates to 50
11、% of its original thickness, and stabilized with suitable clamps. The spacers are to be stabilized outside of the half ring. Two test specimens shall be prepared for the following tests. For details see sketch on page 6. 3.4.8.1 Leakage Test After Heat Ageing After assembling of test equipment with
12、test specimens in place, store in a convection oven for 7 days at 80 +/- 2 C. After removal from the oven store for 3 - 4 h at room temperature. Place 2 - 3 mL distilled water in the open half ring and store 24 h at room temperature. No water shall leak to the bottom between the half ring (or molded
13、 part) and the glass plates. Penetration of water up to 5 mm between test specimens (test slabs only) and glass plates is acceptable. The use of tinted water (e.g. thymol blue) is helpful. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D419-A Printed copies are uncontrolled Copyright 2004, Ford Global Tech
14、nologies, LLC Page 3 of 4 3.4.8.2 Leakage Test After Influence of Waxing/Dewaxing and Heat After assembling of test equipments with test specimens in place, store for 1 h at room temperature. Place approximately 2 mL of waxing compound according to manufacturing standard U-MG 009-021 AB, in the half
15、 ring. The equipment is to be agitated to wet the inside surface of the half ring. After 1 minute pour off, or suck off by use of a medical injection needle, remaining waxing compound. After 24 h storage at room temperature repeat the above process with dewaxing compound according to manufacturing s
16、tandard U-MB 005-8000. Store the test equipment for 24 h at room temperature and then place in a mechanical convection oven for 7 days at 80 +/- 2 C. After this period of time, the leakage test is to be performed as specified under para 3.4.8.1 3.4.9 Resistance of Plastics to Stress Cracking by Gask
17、et Material Test Method: FLTM BO 158-03, except test specimen according to ISO R 527, Type 1/ASTM D 638M, Type I. Strain: 0.65 - 0.75%. After plastic test specimen is placed on the bending fixture, a strip (or section of finished part) of gasket shall be attached to its outside radius with hose clam
18、ps. To obtain a good surface contact between the gasket material and plastic test specimen, after attaching one end of gasket with hose clamp, elongate the gasket before attaching the other hose clamp. Two tests are required for each plastic compound. Following plastic compounds shall be tested. ABS
19、, PC, PMMA After assembling of plastic/gasket specimens, place fixtures for 42 days at 60 +/- 2 C in a mechanical convection oven. After removal and cooling down to room temperature, gasket material shall be cut off near the clamps. Examine the plastics contact surface while in stressed condition. E
20、valuation: The outside radius of plastic test specimens shall show no stress cracks. The surface shall not become dull or show signs of haze, discoloration or softening. Deposits on contact surface are not acceptable. 3.4.10 Flammability (ISO 3795) Burn Rate, max 100 mm/minute ENGINEERING MATERIAL SPECIFICATIONWSK-M2D419-A Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4
