DLA DESC-DWG-90046 REV E-2010 GASKETS SHIELDING EMI RFI ORIENTED WIRES IN SILICONE RUBBER.pdf

1、 REVISIONS LTR DESCRIPTION DATE APPROVED A Added 13 dash numbers. Changes to 4.4.2. Editorial changes throughout. 9 Oct 91 D. Moore B Added wire type 4 to 3.3.2. Added wire type 4 to table I and table II. Editorial changes throughout. 7 Mar 94 D. Moore C Revised 3.3 and 6.1. Added CAGE code 0SLE1 as

2、 a suggested source of supply. Deleted CAGE 02697 as a suggested source of supply. Editorial changes throughout. 21 Jun 95 D. Moore D Incorporated boilerplate updates. 01 Jul 10 Michael A. Radecki E Revised 1.2 Part or Identifying Number (PIN) References 04 Nov 10 Michael A. Radecki Prepared in acco

3、rdance with ASME Y14.100 Source control drawing REV STATUS OF PAGES REV E E E E E E E E E E E E E E PAGES 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PMIC N/A PREPARED BY James B. Walker Jr. DESIGN ACTIVITY DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OH 45444-5000 Original date of drawing 21 November 1990 CHECKE

4、D BY Bud Boulter TITLE GASKETS, SHIELDING, EMI/RFI ORIENTED WIRES IN SILICONE RUBBER APPROVED BY Randy Larson SIZE A CODE IDENT. NO. 14933 DWG NO. 90046 REV E PAGE 1 OF 14 AMSC N/A 5999-2011-E01 CURRENT DESIGN ACTIVITY CAGE CODE 037Z3 HAS CHANGED NAMES TO: DLA LAND AND MARITIME COLUMBUS, OHIO 43218-

5、5000 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a family of EMI/RFI shielding

6、gaskets composed of oriented wires embedded in solid silicone, fluorosilicone, and silicone sponge material. 1.2 Part or Identifying Number (PIN). The complete PIN shall be as follows: 90046 -001 A 1 L _ Drawing number Dash number Elastomer type Wire type Adhesive (see figure 1) (see 3.3.1) (see 3.3

7、.2) (see 3.3.3) 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While eve

8、ry effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbook

9、s. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATION QQ-N-281 - Nickel-Copper Alloy Bar, Rod, Plate, Shee

10、t, Strip, Wire, Forgings, and Structural and Special Shaped Sections. COMMERICAL ITEM DESCRIPTION A-A-59588 - Rubber, Silicone DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-25988 - Rubber, Fluorosilicone Elastomer, Oil and Fuel Resistant, Sheets, Strips, Molded Parts, and Extruded Shapes. DEPARTMENT

11、OF DEFENSE STANDARDS MIL-STD-31000 - Technical Data Packages. (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Provided by IHSNot for ResaleNo rep

12、roduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 3 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise

13、 specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM International) ASTM-B-105 - Hard-Drawn Copper Alloy Wires for Electrical Conductors, Standard Specification for. ASTM-D-395 - Rubber Property Compression Set. (

14、Copies may be obtained online from http:/www.astm.org or from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS (IEEE) IEEE 299 - Enclosures, Electromagnetic Shielding, Measuring the Effectiveness of. (Copies c

15、an be obtained online from http:/www.ieee.org or from the Institute of Electrical and Electronic Engineers, 445 Hoes Lane, P. O. Box 1331, Piscataway, NJ 8854-1331.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE International) SAE-AMS-3195 - Silicone Rubber Sponge, Closed Cell, Medium. SAE-AMS-4182 - Aluminu

16、m Alloy Wire 5.0 Mg - 0.12 Mn - 0.12 Cr (5056-0), Annealed. (Copies may be obtained online at http:/www.sae.org or from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a con

17、flict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Interpretation. This drawing shall be

18、interpreted in accordance with MIL-STD-31000. 3.2 Interface and physical dimensions. Interface and physical dimensions shall be as specified on figure 1. 3.3 Materials. Three elastomer types (see 3.3.1) and four wire types are available (see 3.3.2) are available in the combinations shown in table I.

19、 Any elastomer/wire combination may be ordered using the PIN format specified in 1.2. Design criteria such as EMI requirements, maximum closure force, and environmental considerations determine the appropriate combination of elastomer material and wire type to be used. 3.3.1 Elastomer types. Type A:

20、 Solid silicone rubber in accordance with A-A-59588, class 3, grade 30, (30 +5, -10 shore A durometer). Used in medium to high closure force applications (50 psi to 250 psi). Type B: Solid fluorosilicone rubber in accordance with MIL-DTL-25988, class 1, grade 40, type II. Used in medium to high clos

21、ure force applications (50 psi to 250 psi) where resistance to hydrocarbons is necessary. Type C: Closed cell silicone sponge rubber in accordance with SAE-AMS-3195, except density is.78 g/cm2maximum. Used in low closure force applications (10 psi to 40 psi), where greater compressibility is require

22、d. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 4 3.3.2 Wire types. Type 1: Monel, .0045 .005 inch diameter in accordance with QQ-N-281. Type 2: P

23、hosphor bronze, .0045 .0005 inch diameter in accordance with ASTM B-105, alloy 30 (CDA C50700). Type 3: Aluminum alloy 5056, .005 .0005 inch diameter in accordance with SAE-AMS-4182. Type 4: Monel, .0020 inch .0002 inch diameter in accordance with QQ-N-281. NOTE: This wire is available with type C e

24、lastomer only. 3.3.3 Adhesive. A pressure - sensitive adhesive (PSA) is available on one side of gaskets having a minimum width of .250 inch and a minimum thickness of .062 inch. Include an “L“ in the PIN (see 1.2) for silicone PSA; an “A“ for acrylic PSA; or an “N“ for no PSA. 3.4 Characteristics.

25、3.4.1 Construction. The gaskets shall consist of the specified wire type embedded in the specified elastomer type (see 3.3.1, 3.3.2, and table I). Wires shall be oriented parallel to each other and perpendicular to the material mounting faces. The construction method used shall prevent the wicking o

26、r transmission of moisture or other liquids through or into the gasket. 3.4.2 Wire population. The wire population for each gasket shall be in accordance with table I. A minimum of four wires across the width (W) of the gasket are required for effective shielding. 3.4.3 Wire retention. Wires shall b

27、e convoluted and bonded to the elastomer to resist dislodgment. 3.4.4 Operating temperature range. The operating temperature for each elastomer material type shall be in accordance with table I. 3.4.5 Compression set. The maximum allowable compression set shall be in accordance with table I. 3.4.6 C

28、ompression/deflection. The compression/deflection for each elastomer material type shall be in accordance with table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO.

29、 90046 REV E SHEET 5 PIN 90046- (see note 4) Dim H Dim W PIN 90046- (see note 4) Dim H Dim W PIN 90046- (see note 4) Dim H Dim W 001 .062 .125 016 .125 .500 031 (see note 5) .062 .093 002 .062 .250 017 .125 .750 032 .062 .187 003 .062 .375 018 .125 1.000 033 .062 .625 004 .062 .500 019 .187 .125 034

30、 (see note 5) .093 .093 005 .062 .750 020 .187 .250 035 .093 .187 006 .062 1.000 021 .187 .375 036 .093 .625 007 .093 .125 022 .187 .500 037 (see note 5) .125 .093 008 .093 .250 023 .187 .750 038 .125 .187 009 .093 .375 024 .187 1.000 039 .125 .625 010 .093 .500 025 .250 .125 040 .187 .187 011 .093

31、.750 026 .250 .250 041 .187 .625 012 .093 1.000 027 .250 .375 042 .250 .187 013 .125 .125 028 .250 .500 043 .250 .625 014 .125 .250 029 .250 .750 015 .125 .375 030 .250 1.000 FIGURE 1. Interface and physical dimensions and configuration. Provided by IHSNot for ResaleNo reproduction or networking per

32、mitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 6 Inches mm Tolerance .005 0.13 Dim From Dim To W Tol H Tol .010 0.25 .047 1.19 .062 1.57 .062 .092 .015 +.010 -.-005 .093 2.36 .125 3.18 .187 4.75 .093 .250 .015

33、+.010 .250 6.35 .375 9.53 .375 .750 .047 - .500 12.70 .625 15.88 1.000 - .062 - .750 19.05 1.000 25.40 NOTES: 1. Dimension are in inche.s 2. Metric equivalents are given for general information only. 3, Length shall be as specified in the contract or purchase order. 4. Abbreviated PIN shown. See 1.2

34、 for complete PIN format. 5. Dash numbers 031, 034, and 037 are not available in elastomer type C. FIGURE 1. Interface and physical dimensions and configuration - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY C

35、ENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 7 TABLE I. Characteristics. Characteristics Units Tolerance Test method para. Elastomer types A B C C Wire Wire Wire Wire Type 1 Type 2 Type 3 Type 2 Type 3 Type 4 Wire population No./in2Min 4.4.3 815 815 815 815 550 550 Operat

36、ing temperature range C Min/max - -55/20 -55/200 -55/200 -55/200 -55/170 -55/170 Compression set at 25% compression % Max 4.4.4 20 20 20 20 20 20 Compression/ deflection PSI Max 4.4.5 220 220 220 220 25 25 3.4.7 Shielding effectiveness. The shielding effectiveness of the gaskets shall be in accordan

37、ce with the values specified in table II for each wire type. The shielding effectiveness test method shall be in accordance with 4.4.6. TABLE II. Shielding effectiveness by wire type. Frequency Type 1 (monel) .0045 dia Type 2 (phospher bronze) Type 3 (aluminum alloy) Type 4 (monel) .0020 dia 100 kHz

38、 H-Field 10 MHz E-Field 1 GHz Planewave 10 GHz Planewave 75 dB 100 dB 95 dB 90 dB 80 dB 105 dB 100 dB 95 dB 70 dB 95 dB 90 dB 85 dB 55 dB 90 dB 75 dB 85 dB Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO

39、 SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 8 3.5 Recommended closure conditions. 3.5.1 Recommended closure force. The recommended closure force for each elastomer material type shall be in accordance with the values specified in table III. 3.5.2 Recommended gasket compression. The recomm

40、ended gasket compression for each elastomer material type shall be in accordance with the values specified in table III. TABLE III. Recommended closure conditions. Characteristics Units Tolerance Type A elastomer (silicone) Type B elastomer (fluorosilicone) Type C elastomer (closed cell) Recommended

41、 closure force psi Min 50 50 10 Recommended compression % Min 5 5 10 3.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operation

42、al and maintenance requirements, and promotes economically advantageous life cycle costs. 3.7 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be an approved source of supply. 3.8 Pure tin. The use of pure tin, as an underplate or final finish

43、 is prohibited both internally and externally. Tin content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.3). 3.9 Marking. Gaskets need not be marked. Unit packs shall be marked in accordance with 5.1. 3.1

44、0 Workmanship. Gaskets shall be representative of controlled industrial techniques. Surfaces shall be free of dirt, kinks, scale, lumps, corrosion, or other defects which could affect the life, serviceability, or performance of the gaskets. 4. VERIFICATION 4.1 Sampling and inspection. Unless otherwi

45、se specified, sampling and inspection procedures shall be performed in accordance with table IV. 4.2 Conformance inspection. 4.2.1 Inspection of product for delivery. Inspection of product for delivery shall consist of the group A inspection as specified in table IV. Provided by IHSNot for ResaleNo

46、reproduction or networking permitted without license from IHS-,-,-DEFENSE ELECTRONICS SUPPLY CENTER DAYTON, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 90046 REV E SHEET 9 TABLE IV. Group A inspection. Inspection/test Requirement paragraph Test method paragraph Number of allowable defects Dimensions 3.

47、2 4.2.3 0 4.2.2 Inspection lot. An inspection lot shall consist of all gaskets and test specimens of the same material type made from one batch. 4.2.3 Sampling inspection for dimensions. A dimension measurement shall be made for each roll or spool at a point 3 feet from its end, provided the roll or

48、 spool does not contain more than 5,000 feet. Rolls or spools containing more than 5,000 feet shall be measured for dimensions once per each 5,000 feet or portion thereof. 4.3 Rejected lots. If an inspection lot is rejected, the contractor may rework it to correct the defects, or screen out the defective units and resubmit for inspection. Resubmitted lots shall be inspected using tightened inspection techniques. Such lots shall be separate from new lots, and shall be clearly identified as