塑胶件检验方法及判断 -英文版-微软标准

Plastic Part Workmanship Standards Document Number: D00015Revision: CApril 11, 2006ConfidentialDisclaimerThe information contained hereon is confidential, is submitted in confidence, and is proprietary information of Microsoft Corporation, and shall only be used in the furtherance of, the contract of which this document forms a part, and shall not, without Microsoft Corporation’s prior written approval, be reproduced or in any way used in whole or in part in connection with services or equipment offered for sale or furnished to others. The information contained hereon may not be disclosed to a third party without consent of Microsoft Corporation, and then, only pursuant to a Microsoft approved nondisclosure agreement.Published byXbox Hardware DevelopmentMicrosoft CorporationOne Microsoft WayRedmond, WA 98052-6399Revision HistoryApprovalsS ECTION P AGE1.0 Purpose/Scope (5)2.0 Definitions/References (5)3.0 Definition of Surface Levels and Inspection Criteria (7)4.0 Printed Legends, Logo and Icons (10)5.0 Enclosures (13)1.0 Purpose/ScopeApplies to all XBOX Plastic parts unless otherwise specified by Microsoft Corporationdrawings or specifications or deviations/waivers.The intent of this standard is to provide a cost effective, cosmetically acceptable product for our customers. It is written to work in conjunction with Product Specification andother referenced Microsoft workmanship specifications. This document has precedence over customer detail drawings and workmanship specifications.2.0 Definitions/References2.1 DefinitionsABRASIONS: Surface imperfections that appear as a scuff (handling damage)but are not deep enough to be considered as scratches.BLUSH/SPLAY:A change in gloss in the surface texture that doesn’t match thesurrounding area.BURN MARKS: Black or brown marks on the surface of a part.COSMETIC: Product qualities having to do with appearance.CONTAMINATION: Foreign matter of any kind visible on or in the material.CRACKS AND CRAZING: Fine cracks, which may extend in a pattern on orbetween the surface or through a layer of material.CUT MARKS: A small scratch where material is displaced during a trimmingoperation or handling method.DIMPLE: A raised bump on the top of a keycap that indicates home row orfinger position.FLASH: Excess plastic material around the parting line edges of the part.GATE MARK or VESTIGE: A protrusion extending from the keycap or piecepart at the point of injection.HEAT MARK or GHOSTING: A localized change in gloss or texture causedfrom the excessive heat and/or pressure applied during the heat transfer decoratingprocess.INCLUSION: A solid foreign body enclosed by plastic or spray overcoat. KNIT LINES: The line in plastic piece parts where two separate material flow fronts merge. Refer to weld lines.LIGHT SOURCE: Florescent cool white lighting of approximately 80-120 ft candles shall be used. Light should be perpendicular to the surface being inspected.LIMIT SAMPLE: A product sample that depicts lowest limit of acceptability for a specific quality criteria attribute.MARBLING: A noticeable color change or streak on a surface.NICK: A depression, small notch or groove where material is displaced. RAISED BAR: A home row or key surface identification (see Dimple.) ROCKING an assembled keyboard that does not sit flat on the desktop and is characterized by rocking or vibration when the keyboard is used. SCRATCH: A shallow groove characterized by its long length relative to its depth and width.SHORT SHOT: A part that is missing material, a molding defect.SINKS: A surface depression or dimple caused by material shrink.SKIRT: The bottom boarder or edge of keycapSMEARS/SPOTS/DOTS: Presence of ink not called for on artwork. TEXTURE: A molded surface finish that meets specifications or drawing requirements. May range from gloss to matte or rough.ULTRASONIC WELDING, HEAT/COLD STAKING AND SOLVENT BONDING: Alternate methods of attaching plastic surfaces to each other instead of using a mechanical fastener.VIEWING PLANE: The naked eye shall be focused on the product surfacethrough a span of 60 degrees (± 30 degrees) from a perpendicular line from thesurface being viewed. This plane applies to the surface being viewed.VOIDS: An unfilled space in legends, icons, logos or letters on the keycap orenclosure.WARPAGE: Dimensional distortion that may occur in a piece part after moldingor after assembly of several piece parts.WELD LINE: Line where molten plastic joins to form a part. A weld lineusually appears as a noticeable line across the surface of a part.2.2 References Internal Specifications(900-300-076) [MS Plastic Case Parts Workmanship Standard-ECO Added Reference)]900-300-077 Product Graphic Workmanship Standards900-300-079 Color Correctness Evaluation900-300-444 Pad Transfer Ink Performance SpecH00388 Painted Product Workmanship and Test Spec3.0Definition of Surface Levels and Inspection Criteria3.1 Surface Cosmetic LevelsClass A: All surfaces that are in continuous view of the user. The top and front ofthe enclosure .Class B: Surfaces that are in occasional view of the user where imperfections willnot compromise quality.Class C: Surfaces that are in seldom view of the user where imperfections will not compromise quality.Class D: Surfaces not visible to the user where imperfections will not degrade the functionality and the assembly characteristics of the part or sub-assembly.3.2 Visual Inspection: The inspection or audit area used will be free of dust and dirt,surface shall be flat. There are many cosmetic workmanship details that aredifficult to define. A specific limit sample is often needed in these instances todefine the quality limits. The limit samples are to be approved by Microsoft prior to implementation.a)Lighting: Uniform daylight or uniform cool white fluorescent lighting ofapproximately 80 to 120 foot-candles. Inspection part to be positioned suchthat no shadows are cast onto the viewing area.b)Viewing Distance: 18 to 22 inches from surface under inspection.c)Viewing Plane: Normal usage plane of approximately 45 degrees from theinspection surface. The part under inspection will be rotated to view allexposed surfaces.d)Inspector Qualifications: Inspection must be made by individual with non-magnified 20-20 vision (normal or corrected). No tinted lenses are allowed.e)Viewing Time: 10 seconds per unit.f)Inspection Aids: No magnifying devices are permitted (other than the normalcorrective lenses as required). Defect comparator or other measuring devicesmay be used to determine size of defects.3.3Color Inspection: All molded parts must comply with the color specified and bein the acceptable limits defined on a Microsoft color tolerance standards set or aspecific limit sample approved by Microsoft as referenced in individual productspecifications, and/or detail component drawings.Color Tolerance: All plastic parts must be held to a tolerance Delta E of 1.00 as compared to the Microsoft approved color chip standard and measured with anapproved color meter. All raw resin will be held to a Delta E of .75 as comparedto the Microsoft approved color standard and supplied by the Resin Manufactureto the Molder. Certification of the color measurement of the resin must besupplied by the resin manufacture with each lot, and keep on file at the molder,along with the mechanical testing certification, which is also supplied with eachlot.3.4Texture Inspection: All molded parts must comply with the texture specified inthe individual product drawing specification. All texture must be acceptable asvisually compared against a sample panel or specific limit sample part (molded in the same material) approved by Microsoft, and defined by the detail componentdrawings.3.5Texture Wear: Retained samples from each cavity will be keep on record at themolder and will be available for Microsoft inspection against current moldedsamples on a quarterly basis for monitoring of texture wear. Quarterly sampleswill be retained for ongoing texture wear evaluation and history (four sets ofplastic parts retained per year). Samples maybe measured for texture wear orevaluated visually per Microsoft discretion. Decision for tooling re-texture willbe made by resonsible Microsoft Tooling Engineer and coordinated withMicrosoft comodity team to insure no disruption to production part delivery.Texture wear evaluation and decision for re-texture is subjective.4.0 Printed Legends, Logo and IconsThis standard applies to laser, sublimation, heat transfer and pad-printed legends andicons.4.1 Character Height:Heights shall be as specified in the artwork. Measurement of the artwork positivemay be required. Character height variation is acceptable, if within the line widthtolerance, or 15% of the character height.4.2 Character Line Width:Character widths shall be specified in the artwork. Measurement of the artworkpositive may be required.a. Indicia line widths less than .020" lines: acceptable, +/– .002"b. Indicia line widths more than or equal to .020" lines/or equal: acceptable,+ .008", –.004"4.3 Character Spacing:Refer to artwork.4.4 Single Character and Icon Tilt:Acceptable, maximum of .005”4.6Legend (multiple characters) and Logo Tilt:a. 1/2" or less in length: acceptable, max. .007"b.Greater than 1/2" to 1" in length: acceptable, max. .010" c. Greater than 1” in length: acceptable, max. .0130”4.7Character Voids:Acceptable, one void per character is acceptable provided it does not exceed .010” (0,25 mm) in width.4.8 Character Smear:For pad printed indicia, one smear per character is acceptable provided it does not exceed .005” in width from legend edge.AcceptableNot acceptableLess than .005”More than .005”5.0Enclosures5.1 Abrasions:a. Level 1: Not acceptable.b. Level 2: Acceptable, 2 or less abrasions, less than .040 inch 2 (25.8 mm 2).c. Level 3: Acceptable, 4 or less abrasions, less than .062 inch 2 (40 mm 2).d. Level 4: Acceptable.5.2 Blush/Splay:a. Class A, B and C: Acceptable, if not visible under normally diffused non-reflected light, or if the blush/splay disappears when the viewing plane isaltered by + 30 degrees or as approved by Microsoft.b. Class D: acceptable5.3 Burns:a. Class A, B and C: not acceptable.b. Class D: acceptable, 1 burn less than .250" x .250" if part is functional.5.4 Color Variation:a. Class A, B and C: finished parts should be of a generally even color withminor color variations allowed. The total color variation across the partmust be within ∆E of 1.00 to the Microsoft approved color chip (Refer toMicrosoft document on Color Correctness Evaluation900-300-079).b.Class D: acceptable, Delta E of 2.005.5 Contamination, inclusion, molded-in contamination:Note: particles smaller than .010" are considered not visible.a. Class A: acceptable, one particle .015" or less every 10 linear inches.b. Class B and C: acceptable, multiple particles .015" or less; or, oneparticle .025" or less every 3 linear inches.c. Class D: no restrictions if part is functional.5.6 Cracks and Crazing:Not acceptable.5.8 Flash:No Flash trimming allowed without written prior approval from Microsoft. Allallowed trimmed parts must meet dimensional requirements per the CADdatabase or engineering drawings. In addition, flash shall not exceed the following parameters.a.Class A, B and C: acceptable if less than .004".b.Class D: acceptable if less than .008”.5.9Foreign Material: a. ClassA, B and C: acceptable: a loose airborne particulate or piece of packaging material that is removable by wiping with clean cloth or by using air jet.c.Not acceptable: contamination with oil, ink, hand cream, or other foreignmaterial that is visible, or alters feel, or impairs manufacture of theassembly (e.g. legend printing, affixing labels).d.Class D: Acceptable if does not alter function of part.5.10 Gate Marks:a. Class A: Not acceptable.b.Class B, C and D: acceptable if part is functional and does not exceed limitSample.5.11 Knit/Weld Line:a.Class A, B and C: Acceptable, if not visible under normally diffused non-reflected light, or if the knit/weld line disappears when the viewing planeis altered by + 30 degrees. . Exceptions may be accepted via mutuallyaccepted limit samples.b. Class D: acceptable if no voids.5.12 Marbling:a. Class A, B and C: Acceptable, if not visible under normally diffused non-reflected light, or if the marbling disappears when the viewing plan isaltered by + 30 degrees.b. Class D: acceptable.5.13 Scratches/Nicks:a. Class A: N o scratches within .04” of logo or icons. One acceptable, .050”length, .003” width, .005” depth.b. Class B: one acceptable, .250” length, .003” width, .005" depth.c. Class C: one acceptable, .500” length, .005” width, .005" depth.d. Class D: acceptable as long as part is functional.5.14 Short Shot:a. Class A, B and C: not acceptable.b. Class D: acceptable, by limit sample or digital image as long as parts arefunctional.5.15 Sinks:a. Class A: acceptable, less than .002" depth.b. Class B: acceptable, less than .004" depth.c. Class C: acceptable, less than .008” depth.d. Class D: acceptable, less than .015" depth and parts are functional.5.16 Ultrasonic Welding, Heat/Cold Staking and Solvent Bonding:Microsoft to inspect and approve on a per part basis.Excess molten plastic or bubbling or cobwebs are not acceptable.。