Dia ol enjinia, ol patna bilong baim ol samting, na ol manmeri i save mekim ol teknikel disisen:
Long ol teknikel konsaltesen bilong mipela long olgeta de, askim ol i save askim mipela planti taim em i no "Wanem prais?" tasol, "Dispela 'sealing strip' bai stap inap long wanem taim?"
Planti kastoma i bin bungim dispela hevi: sempel i soim gutpela 'sealing' long taim bilong tes, tasol i stat long lik wara o win bihain long tripela mun bilong wok; o, maski hat bilong en i inapim ol samting ol i makim, ol i lukim ol 'inreversible indentations' taim ol i rausim. As bilong olgeta dispela samting i stap long nambawan samting bilong bodi insait long raba indastri - Kompresen Set (CS).
Nau, bai yumi go moa long ol tingting we i no klia tumas na, stat long ol 'molecular chains' na 'pore structure', bai yumi brukim ol as tingting we i save makim wok bilong pasim ol samting.
I. Lukluk gen long "Compressive Permanent Deformation"
Long sait bilong 'foamed silicone', wok bilong pasim em i wankain olsem strong bilong en; pefomens bilong pasim em i wankain olsem strong bilong sakim 'compressive deformation'.
Kompresiv permanen difomesen i makim hamas difomesen we wanpela standet tes spesimen i no inap long kisim bek bihain long ol i rausim, taim ol i presim spesimen long wanpela spesifik reit (olsem, 25% o 50%) long wanpela spesifik tempereja (olsem, 100 digri ) long wanpela spesifik taim (olsem, 22 aua o 72 aua). Sapos dispela paramita i liklik, dispela i soim olsem dispela samting i gat bikpela 'elastic retention rate' na i no gat bikpela sans long 'leak' i kamap.
Taim bikpela 'permanent deformation' i kamap, dispela i soim olsem:
Stres bilong 'interface relaxation': 'Clamping force' long 'flange connection' i go daun na i pundaun aninit long 'internal medium pressure'.
Fomesen bilong ol 'microchannel': ol hul i bruk o pundaun, na dispela i mekim na ol 'leakage channel' i pas wantaim.
Mentenens planti taim: Ol i mas taitim ol bolt oltaim long stretim ol hevi we i lus.
II. Fopela Bikpela Dimensen we i save makim 'Deformational Fate'
Influens bilong kompresen difomesen i no kamap long wanpela samting tasol, tasol em i makim wanpela kompleks "sistematik enjiniaring" proses. Mipela i bin katigorisim dispela proses i go long foapela kain level, stat long 'microscopic' i go long 'macroscopic' skel:
1. Material Gene: Gem Dynamics bilong Formulation Systems
Dispela em i as bilong 'deformation', we i kamap long 'silicone raw rubber' na 'additive system'.
Raw rubber (base polymer) seleksen: Vinyl konten na molekiul weit distribusen i save senisim 'crosslinking density'. Raw raba we i gat bikpela viskositi tumas i save soim bikpela 'molecular chain entanglement', na dispela i mekim hat long ol sen i ken slait taim ol i presim; olsem na, 'permanent deformation' i save kamap planti taim tumas.
Reinforcement and crosslinking system: There is a "golden inflection point" in the dosage of vulcanizing agents. Although an excess of vulcanizing agent increases hardness, it can make the molecular chains too rigid and reduce their flexibility, thereby adversely affecting the compressive fatigue resistance.
'Foming agent matching': 'Foming rate' i mas wankain olsem 'vulcanization rate'. Sapos 'foaming' i kamap hariap tumas na i no gat inap 'cross-linking', ol 'bubble wall' bai i liklik tumas na bai bruk hariap taim ol i presim; sapos 'cross-linking' i kamap hariap tumas taim 'foaming' i no kamap hariap, ol 'bubble' bai no inap long go bikpela olgeta, na dispela bai mekim na 'closed-cell rate' i no inap.
2. Mikrostraksa: Klostu-pore volium fraksen na pore sais distribusen
Dispela em i bikpela pait we 'foamed silicone' i narakain long 'solid silicone'.
Gutpela sindaun: Wanpela wankain, gutpela-hanikom straksa wantaim bikpela 'closed-cell rate. Taim ol i putim presa long en, ges insait long ol sel i pas i save bihainim lo bilong Boyle (P₁V1=P2V2), na dispela i save givim 'pneumatic' sapot we i save helpim ol sel long kirap hariap taim presa i lusim.
Ol hul i no gutpela: Sapos sais bilong ol hul i no wankain (ol hul i pas o i op), strong bilong presim bai stap long ol bikpela hul. Taim ol dispela wik poin i kisim plastik difomesen o bruk, gutpela kompresen reit bilong olgeta 'sealing cross-seksen bai lus olgeta.
3. Ol kondisen bilong wok: Ol hevi bilong hat na midia-i kamapim lapun
Dispela em i wanpela samting ausait na em i nambawan as bilong planti hevi i save kamap long sait.
Thermal-oxidative aging: Ol bikpela hat i save mekim 'oxidative cleavage' bilong 'silicone polymer backbone' i go hariap. Bihain long sampela taim, pes bilong dispela samting i kamap strong, na 'internal cross-linking density' i senis, na dispela i mekim na 'compressive stress relaxation' i kamap strong moa. Long 150 digri, 'deformation rate' bilong nomol silikon i ken kamap 3-5 taim moa long mak bilong rum tempereja.
Compression ratio setting: It is generally recommended that the compression ratio be between 15% and 25%. An excessively high compression ratio (>30%) bai krungutim stret ol hul bilong sel, na kamapim bagarap long bodi we i no inap senis; wanpela 'compression ratio' we i liklik tumas bai i no inap long kamapim gutpela 'initial sealing ratio' presa.
4. Rot bilong bagarap: Bodi i bagarap long taim bilong kompresen proses
Aninit long wanpela 'microscope', 'compression failure' i save kamap long tripela step:
Fes I (Gas Escape): Wantu presa i go antap na fosim ges insait long hul we i pas long ranawe i go insait long ol 'micropores' insait long 'bubble wall'.
Phase II (Bubble Wall Folding): Bubble wall, we i stap wankain olsem 'compression direction', i save kamapim ol 'permanent creases' aninit long 'shear force'.
Fes III (Bubble wall rupture): Bubble wall, we i stap stret long sait bilong kompresen, i bruk bikos ol i stretim tumas; ol 'bubble cavities' we i stap klostu i bung wantaim na kamapim wanpela bikpela bruk.
III. Wanpela Gaid bilong abrusim ol hevi we planti manmeri i save bungim taim yu makim ol prodak
Olsem opereta, mipela i no rekomendim ol kastoma long lukluk tasol long ol "veliu" we i stap insait long tes ripot; nogat, ol i mas lukluk gut long "ol veliu aninit long ol wok kondisen tru." Hia i gat tripela gutpela rekomendesen:
Askim long "post-aging" data, na i no long "initial inspection" data.
Plis lukluk long ol data bilong 'compression permanent deformation' we ol i kisim bihain long ol i putim long 150 digri inap 72 aua o long 225 digri inap 24 aua, olsem saplaia i givim. Gutpela wok long rum tempereja i no inap long mekim em i stap gut long bikpela tempereja.
Skelim "stres rilaksesen" kev
Kompresiv permanen difomesen em i wanpela samting we i no save senis, tasol 'stress relaxation' em i wanpela samting we i save senis senis. Taim ol samting i orait, ol i mas askim saplaia long givim wanpela 'curve' we i soim olsem wanem strong we ol i yusim i save bagarap long taim long wanpela 'compression rate'. Sapos 'slope' i no strong tumas dispela i soim olsem 'sealing service life' i stap longpela taim.
Kisim hat na densiti long ol kondisen bilong wok:
Low-pressure, static sealing (eg, dust protection for lighting fixtures): Low-hardness, high-rebound materials (density 0.35–0.45 g/cm3) yu ken makim.
Hai-presia, dainamik siling aplikesen (olsem, pawa bateri pek): Em i gutpela long yusim ol samting we i gat namel-i go long-hai hat na hai klos-sel reit (densiti: 0.5–0.7 g/cm3), na putim ol gutpela sapot disain.
Olsem wanpela biknem Saina saplaia insait long fom silikon indastri, veliu bilong mipela i go moa long givim wanpela rol bilong ol 'sealing strips' tasol; em i stap long givim yu wanpela "maintenance-fri" siling solusen long olgeta laipsaiklon - we i kamap long rot bilong stretpela fomulasen optimaisesen (optimizim kros-linking/foaming kompatibiliti) na strongpela proses kontrol (mekim wankain pore straksa).
Sapos yu wok long painim ol samting bilong pasim samting we i stret long ol kain kain wok olsem ples we i no hat tumas, strongpela 'ultraviolet radiation', o bikpela 'frequency vibration', plis yu ken toktok wantaim mipela long wanem taim yu laikim. Mipela i ken givim ol 'customized deformation prediction data' we i stret long 'compression ratio' na 'temperature requirements' bilong yu, na helpim yu long daunim ol hevi bilong disain long rot bilong ol 'data-driven insights.