NAVY MIL-STD-407-1957 VISUAL INSPECTION GUIDE FOR RUBBER MOLDED ITEMS《橡胶模塑制品直观检查向导》.pdf

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1、NOTE: MIL-STD-407 has been redesignated as a Test Method Standard. The coverpage has been changed for Administrative reasons. There are no other changesto this Document.MIL-STD-40715 FEBRUARY 1957SUPERSEDINGNAVSHIPS 250-344-7JANUARY 1955AMSC N/A FSC 93GPDISTRIBUTION STATEMENT A. Approved for public

2、release; distribution isunlimited.DEPARTMENT OF DEFENSETEST METHODVISUAL INSPECTION GUIDEFORRUBBER MOLDED ITEMSProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-40715 February 1957OFFICE OF THE ASSISTANT SECRETARY OF DEFENSE,WASHINGTON 25, D. C.1

3、5 FEBRUARY 1957.Supply and LogisticsVISUAL INSPECTION GUIDE FOR RUBBER MOLDED ITE.MSMIL-STD-4071. This standard has been approved by the Department of Defense andis mandatory for use by the Departments of the Army, the Navy, and theAir Force, effective immediately.2. In accordance with established p

4、rocedure, the Standardization Divisionhas designated the Ordnance Corps, the Bureau of Ships, and the Air Force,respectively, as ArmyNavy-Air Force custodians of this standard.3. Recommended corrections, additions, or deletions should be addressedto the Standardization Division, Office of the Assist

5、ant Secretary of Defense(Supply and Logistics), Washington 25, D. C.iiProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-40715 February 1957FOREWORDGovernment material procurement specifications have been primarily con-cerned with detailing compos

6、ition, construction and necessary physical re-quirements. However, little attention has been paid to defining the limits ofacceptable quality regarding manufacturing defects other than such general-izations as “the workmanship shall be first class”. In such a diverse industryas that of rubber manufa

7、cturing, individual plants vary considerably in theirproduction and quality control techniques. Defects are likely to occurfrom many causes such as variation in the quality of the basic materialsand variations in manufacturing processes and finishing operations. Therefore,the quality generalizations

8、 used in this document must of necessity cover aconsiderable range which represents the best available judgment. This docu-ment is issued as a practical yardstick which Inspectors w-ill use to appraisevisually the quality of rubber molded items.iiiProvided by IHSNot for ResaleNo reproduction or netw

9、orking permitted without license from IHS-,-MIL-STD-40715 February 1957CONTENTS1. SCOPE AND PURPOSE -1.1 SCOPE -1.2 PURPOSE -2. REFERENCED DOCUMENTS -2.1 STANDARDS -3. DEFINITIONS -4. DEFECT DESCRIPTIONS AND CLASSIFICATION -TABLES1111111Table IDefects ClassificationivProvided by IHSNot for ResaleNo

10、reproduction or networking permitted without license from IHS-,-1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.LIST OF FIGURESAir checklocation Imajor; locationIIminor.Air checkslocation Imajor; loca-tion IImajor.Trapped airlocation Imajor; loca-tion IImajor,Trapped airlocation Imajor; loc

11、a-tion IImajor,Trapped airlocation Imajor; loca-tion IIminor.Trapped airlocation Imajor; loca-tion IIminor,Blisterlocation Imajor; location IImajor.Blister1ocation Imajor; location IImajor.Blister1ocation Imajor; location IImajor.Blister1ocation Imajor; location IIminor.Blister1ocation Imajor; locat

12、ion IIminor.Blister1ocation Imajor; location IIminor.Bloom, heavylocation Imajor; loca-tion IIminor.Bloom, heavy-location Imajor; loca-tion IIminor.Cavity, damagedlocation Imajor; lo-cation IIminor.Cavity, damaged-location Imajor; lo-cation IIminor.Cavity, damaged location Imajor; lo-cation IIminor.

13、Cavity, damagedlocation Imajor; lo-cation IIminor.Cavity, damagedlocation Imajor; lo-cation IIminor.Cavity, damagedlocation Imajor; lo-cation-minor.Cavity, small mold scratchlocation Inot a defect; location IInot a defect.Coating, defectivelocation Imajor;location IImajor.23.24.25.26.27.28.29.30.31.

14、32.33.34.35.36.37.38.39.40.41.42.43.MIL-STD-40715 February 1957Coating, defectivelocation Imajor;location IImajor.Coating, defective-location Imajor;location IImajor,Cracklocation Imajor; location IImajor,Crack1ocation Imajor; location IImajor,Crack1ocation Imajor; location IImajor.Crack1ocation Ima

15、jor; location IIminor, .Deformedlocation Imajor; locationIImajor. (Upper example is a de-fective. Lower example is a correctone for comparison. )Deformedlocation Imajor; locationIIminor.Deformedlocation Imajor; locationIIminor,Deformedlocation Imajor; locationIIminor.Bad filllocation Imajor; locatio

16、n IImajor.Bad filllocation Imajor; location IImajor.Bad fill-location Imajor; location IImajor.Poor fill-location Imajor; locationIIminor.Flash,tionFlash,tionFlowtionFlowtionF1owtionFlowtioncured-inlocation Imajor; loca-IImajor.cured-inlocation Imajor; loca-IIminor.marklocation Imajor; loca-IIminor.

17、marklocation Imajor: loca-IIminor.marklocation Imajor; loca-IIminor.marklocation Imajor; loca-IIminor.Foreign materiallocation Imajor; lo-cation IImajor.vProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-40715 February 195744.45.46.47.48.49.50.51

18、.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.viForeign materiallocation Imajor; lo-cation II major.Foreign materiallocation Imajor; lo-cation IIminor.Pin holelocation Imajor; locationIIminor.Pin holelocation Imajor; locationIIminor.Pin holelocation Imajor; locationIIminor.Marking not clear

19、ly legibleminor.Marking not clearly legibleminor.Marking not clearly legibleminor.Dirty moldIocation Imajor; locationIIminor.Dirty moldlocation Imajor: locationIIminor.Dirty moldlocation Imajor; locationIIminor.Dirty moldlocation Imajor: locationIIminor.Porositylocation Imajor; locationIImajor.Poros

20、itylocation Imajor; locationIImajor.Porositylocation Imajor: locationIIminor.Porositylocation Imajor: locationIIminor.Off registerlocation Imajor; locationIImajor.Off registerlocation Imajor; locationIImajor.Off registerlocation I major; locationIIminor.70.71.72.73.74.75.76.77.78.79.80.81.82.83.84.8

21、5.86.87.88.89.90.91.92.Sprue marklocation Imajor; locationIInot a defect.Sprue marklocation I major; locationIInot a defect.Trim, bufflocation Imajor; locationIImajor.Trim, bufflocation Imajor; locationIIminor.Trim, bufflocation Imajor; locationIIminor.Trim, bufflocation Inot a defect; lo-cation 2no

22、t a defect.Trim, handlocation Imajor: locationIInot a defect.Trim, handlocation Imajor; locationIInot a defect.Trim, handlocation Imajor; locationIInot a defect.Trim, handlocation Imajor; locationIInot a defect.Trim, handlocation Imajor; locationIInot a defect.Trim, machinelocation Imajor: loca-tion

23、 IImajor.Trim, machinelocation Imajor; lo-cation IImajor,Trim, machinelocation Imajor; loca-tion IImajor.Trim, machinelocation Imajor; loca-tion IIminor. (Top example is cor-rect for comparison. Bottom exampleis a defective.)Trim, machinelocation Imajor; loca-tion IIminor.Trim, machinelocation Imajo

24、r; loca-tion IIminor.Trim, machinelocation Imajor; loca-tion IImajor. (Top example is thedefective. Bottom example is a cor-rect one for comparison.)Trim, machine location Imajor; loca-tion IImajor.Trim, machine location Imajor; loca-tion. IImajor.Trim, machine location Imajor; loca-Off registerloca

25、tion I major; locationIIminor.Off registerlocation I major; locationIIminor.Back rindlocation I major; locationIImajor.Back rindlocation I major; locationIImajor.Back rindlocation I major; locationIIminor.Back rindlocation I major; locationIIminor.Sprue marklocation I major; locationIImajor.tion IIm

26、ajor.Trim, tumblelocation Imajor; loca-tion IImajor.Trim, tumblelocation Imajor; loca-tion IInot a defect.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-93.94.95.96.97.98.99.100.101.102.103.104.Trim, tumblelocation Imajor; loca-tion IInot a defect.Flo

27、ating fabriclocation Imajor; loca-tion IIminor.Bad adhesionlocation Imajor; loca-tion IImajor.Bad adhesionlocation Imajor; loca-tion IImajor.Bad adhesionlocation Imajor; loca-tion IImajor.Poor adhesionlocation Imajor; loca-tion IIminor.Poor adhesionlocation Imajor; loca-tion IIminor.Poor adhesionloc

28、ation Imajor; loca-tion IIminor.Excessive flashlocation Imajor; loca-tion IImajor.Excessive flashlocation Imajor; loca-tion IImajor.Excessive flashlocation Imajor; loca-tion IImajor.Excessive flashlocation Iminor; loca-tion IInot a defect,105.106.107.108.109.110.111.112.113.114.115.116.MIL-STD-40715

29、 February 1957Misplaced (insert)location Imajor;location IImajor.Misplaced (insert)location Imajor;location IImajor.Missing (insert)location Imajor; lo-cation IImajor.Missing (insert)location Imajor; lo-cation IImajor.Rustlocation Imajor; location IImajor.Rustlocation Imajor; location IIminor.Bad st

30、akinglocation Imajor; loca-tion IImajor. (Top bolt is the de-fective. Bottom bolt shows the correctposition.)Bad threadsmajor.Bad threadsmajor.Bad threadsmajor. (Top bolt haschafed threads. Bottom bolt is anacceptable example.)Bad threadsmajor; (Threads in the topbolt are missing. Other bolts areacc

31、eptable examples.)Poor threadsminor.viiProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-40715 February 19571. SCOPE AND PURPOSE1.1 Scope. This docume

32、nt covers the de-fects for conventional rubber molded items, thatis, articles which are made by curing rubbercompounds in a forming mold. Cast plastisolitems, “O” rings, pneumatic tires and tubes,molded rubber fuel tanks, ebonite items anditems containing cellular rubber are specificallyexcluded.1.2

33、 Purpose. The primary objective of thisdocument is to present word descriptions andphotographs of possible defects in rubber moldeditems that may be presented for inspection. Inaddition it provides a training aid for inspectors.1.2.1 In general, this document is not in-tended to take the place of a

34、particular inspec-tion procedure aid which may be provided forinspectors to verify conformance with a par-ticular specification. The quality requirementsspecified in the basic specification are governing.2. REFERENCED DOCUMENTS2.1 StandardsMILITARYML-STD-105Sampling Proceduresand Tables for Inspecti

35、on by At-tributes.MIL-STD-177Rubber Products,Terms for Visible Defects of.(Copies of specifications, standards, drawings, andpublications required by contractors in connection withspecific procurement functions should be obtained fromthe procuring agency or as directed by the contractingofficer.)3.

36、DEFINITIONS3.1 The categories, major and minor defects,are as defined in Standard MIL-STD-105.3.2 Word descriptions of defects used in thisstandard are in accordance with StandardMIL-STD-177.3.3 Location I defect. The condition wherethe imperfection occurs on a primary use partof the item surface as

37、 regards dimensional toler-ances or physical stress in service.3.4 Location II defect. The conditionwhere the imperfection does not occur on aprimary use part of the item surface as regardsdimensional tolerances or physical stress inservice.3.5 Fabric, floating. The condition wherea reinforcing fabr

38、ic is not in the correct position.3.6 Staking, bad. The condition where aninsert is not in the correct position.4. DEFECT DESCRIPTIONS AND CLAS-SIFICATION4.1 Since the classification of certain de-fects depends on the service requirements ofthe item, it is imperative that the end use beknown before

39、inspection is started. In themajority of cases, the end uses will be apparentor can be readily determined from the procure-ment document. However, in case of doubt,the cognizant technical bureau or agency (onprimes) or the endorsing inspection service (onsubs) should be requested to supply thisinfor

40、mation.4.2 The classification of defects for moldeditems is more complex than that for a single-shape, single-application item such as V-belts.Molded items are produced in a nearly infinitevariety of sizes and shapes so that there is nocommon or typical shape for this class of item.Also, these items

41、 have several principal enduses or service requirements which are dis-similar in the amount of perfection or qualityrequired. These include the following:(a) Flexing A primary use where the.item undergoes constant or inter-mittent bending, twisting or deflect-ing during service such as a vibra-tion

42、isolation mounting.(b) Sealing A primary use where theitem serves as an airtight or water-tight closure such as a gasket or aboot.(c) Barring (barrier material) A primary.use where the item serves as an im-pervious material to passage of aliquid or gas such as a diaphragm orpneumatic closure.,(d) Ma

43、tching A primary application fordimensional tolerances where theitem must be assembled with matingparts such as a stud mounting or acable connector.(e) Protecting-An intermediate use wherethe item serves as a covering mate-rial and physical stress is non-exist-ent or occurs infrequently, such as abr

44、ake pedal.1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-40715 February 1957(f) Filling Subordinate use where the.item serves merely as an internsspace filler and physical stress is non-existent or occurs infrequently.A molded item may, and f

45、requently does,have two or more of these service requirementsin combination.4.3 It is recognized that the rejection of aninspection lot of molded items for defectswhich are not commensurate with the dimen-sional tolerances or degree of quality requiredby the user can result in an appreciable increas

46、ein the cost of production. Also, in some in-stances the enforcement of very high standardscould result in an appreciable decrease in thevolume of production. Accordingly, some ofthe defects in this standard are classified underthree categories (major, minor, or acceptable)depending on the type of service requirementNote the definitions of location I and location IIdefects under definition of terms4.4 Illustrations. The illustrations of phys-ical defects, as shown on f