鏡片生產(chǎn)加工工藝 減少鍍膜膜層開裂

什么是膜裂紋Whatiscrazing?它是鍍膜膜層當(dāng)中的微小裂隙Itissmallmicro-fracturesintheARcoating.它經(jīng)常出現(xiàn)在中心厚度小于1.3mm的鍍膜產(chǎn)品當(dāng)中Itappearsmostofteninthin(<1.3mmcenterthickness)ARproducts.它出現(xiàn)時看起來像鏡片表面出現(xiàn)煙霧一樣Itappearsasahazeorfogonthelens什么導(dǎo)致膜裂的產(chǎn)生Whatcausescrazing1.割邊機(jī)上夾過程中Duringtheclampingintheedger-壓力太高pressureistoohigh設(shè)定的夾緊力太高（需校正）Clamppressuresettoohigh(calibration)材料設(shè)定錯誤Usewrongmaterialsetting夾緊力太高Clampingpressuretoohigh–裝配件沒有很好的匹配accessoriesarenotproperlyadapted卡盤不匹配Chucksdonotmatch卡盤不在同一軸線Chucksdonotalign卡盤匹配不好Badchuckmatching有四分之一的后期操作可導(dǎo)致鏡片出現(xiàn)膜裂Crazingcanoriginatefrom1of4finishingoperations:2.割邊過程中-薄的鏡片在割邊及鉆孔時容易彎曲DuringedgingThinlensescanflexduringtheedgingand/ordrillingcycle.-當(dāng)鏡片與割刀、滾輪或打孔機(jī)接觸時也會產(chǎn)生變形及膜裂Thiscanbecausedwhenthelensmakescontactwiththecuttingtool;wheel edger;ordrillmachine.什么導(dǎo)致膜裂的產(chǎn)生Whatcausescrazing3.裝配過程當(dāng)中Duringmounting-塑料框架Plastic/Zylframes將鏡片塞入鏡框中時變形Flexingwheninsertingthelensintotheframe-鏡片太大Toobig-安裝技術(shù)不對Wrongtechnique加熱鏡框時溫度加熱過度Toomuchheatwhenwarmingframe-全金屬框FullMetalframe如果鏡片過大，緊固鏡架時鏡片會受壓Iflensistoolarge,itwillbecompressewhentighteningtheframe.-鉆孔安裝架DrillMounts如果孔周圍壓力太高Ifthepressurearoundtheholeistoohigh.什么導(dǎo)致膜裂的產(chǎn)生Whatcausescrazing什么導(dǎo)致膜裂的產(chǎn)生Whatcausescrazing4.當(dāng)從夾具上剝離鏡片時WhenDe-blockingofthelens-當(dāng)從夾具上剝離鏡片時，不恰當(dāng)?shù)募夹g(shù)手法會使鏡片變形Improperhandlingtechniquescancreateflexingduringthedeblockingprocess.硬拉夾具Pullingtheblock用手硬拉鏡片Removingbyhand-正確的手法是轉(zhuǎn)動夾具

減少膜裂的步驟StepstoReduceCrazing建議采用下面的“最佳操作方法”來減少能夠造成膜裂的破壞Itisrecommendedtofollowthese“BestPractices”toreducebreakagethatiscausedbycrazing.如何減少膜裂Howtoreducecrazing最佳實踐經(jīng)驗-夾具模塊

BestPractices-Blocking割邊Edging