Mu myaka yashize nkora mu nganda zikora inganda, nakunze kwakira ibibazo byabakiriya: "Ntabwo gasike ya silicone ifuro impeta yoroshye gusa? Urashobora kugura kimwe."
Ntabwo aribyo. Guhitamo ibikoresho bitari byo, gukoresha indangagaciro zidakwiye, cyangwa kwirengagiza ibipimo byo kwikuramo bishobora gutera ibibazo bito nko guhumeka ikirere cyangwa amazi, cyangwa ingaruka zikomeye nko kwangiza ibikoresho cyangwa n’umutekano. Uyu munsi, turerekana ingero 3 nyazo - zisi kugirango tugufashe kwirinda "imitego ihishe" ifitanye isano nimpeta ya silicone.
Mugihe cy'ubushyuhe bwo hejuru -, udukarito dusanzwe twangirika mu ifu mumezi atatu.
Uruganda rukora amapaki mashya yingufu za batiri rwatangaje ko impeta zifunga impumu bakoresheje zimaze igihe kitarenze kimwe cya kane mbere yuko ibice byo hejuru bigaragara, kandi bizacika kuri compression iyo bisenyutse. Ubushyuhe bwibidukikije ntabwo bwari bukabije (mubisanzwe hafi dogere 80 mugihe kinini). Niyihe mpamvu ishobora kuba?
Isesengura ryerekanye ko ibyaguzwe byari impeta zisanzwe za EPDM, zifite uburebure bwa - igihe cyo kurwanya ubushyuhe bwa dogere zigera kuri 120 gusa, mu gihe impeta ya silicone ishobora kwihanganira dogere 250. Nubwo dogere 80 itarenga EPDM yihanganira cyane, ahantu hashyushye mumashanyarazi ya bateri, hamwe nibidukikije nka ozone nubushuhe, byihuta gusaza kwa EPDM. Ibinyuranyo, impeta ya silicone impeta, hamwe na Si - O - Si imiterere yumugongo, igaragaza ko irwanya ozone, imirasire ya ultraviolet, hamwe nubusaza bukabije -, bikongerera igihe cyumurimo inshuro 3-5 mugihe kimwe.
Impanuro: Kubikoresho byerekanwe nubushyuhe buri hejuru ya dogere 60 cyangwa ibidukikije hanze mugihe kinini, impeta ya silicone impeta igomba guhitamo kuruta reberi isanzwe;.
Ikiburanwa cya 2: Kunanirwa kashe ntibiterwa no gufunga bidakwiye ahubwo biterwa no kubara nabi igipimo cyo kwikuramo.
Uruganda rwo hanze rwerekana LED rusaba icyemezo cya IP68. Bakoresheje gufunga - selile impumu ya silicone impeta ifite ubukana bwa 40 Shore OO nubugari bwa mm 5. Mugihe cyoherejwe - kwishyiriraho imvura igerageza, amazi yinjiye mubicuruzwa bimwe. Gusenya byagaragaje ko impeta zifunze zafunzwe cyane, ndetse ibice bimwe byacitse.
Ikibazo kiri mubishushanyo mbonera. Icyifuzo cyo guhunika kumurongo wimpeta ya silicone isanzwe iri hagati ya 15% na 30% (kubifunga - ibyubaka selile). Nyamara, kugirango ugere ku kashe nziza, ubujyakuzimu bwa groove bwakozwe kuri mm 3,8 gusa, bivamo igipimo nyacyo cyo kwikuramo cya (5 - 3.8) / 5=24%, bigaragara murwego rwagenwe. Nyamara ibikoresho bya furo byerekana kuruhuka; kumara igihe kirekire bigabanya imbaraga zabo zo kwisubiraho, zifatanije nogukwirakwiza ibibazo byaho mugihe cyo kwishyiriraho, amaherezo biganisha ku kunanirwa.
Icyakurikiyeho, twasabye guhindura ubujyakuzimu bwa mm 4.2 (hamwe na compression ya 16%) no kongeramo imiterere, bityo tugakemura ikibazo. Byongeye kandi, fungura - selile impeta ya silicone impeta irashobora kugera ku kigero cyo hejuru cyo kwikuramo (30-50%), ariko gufunga - selile zikoreshwa mubisabwa bisaba gukora cyane.
Inama: Guhitamo impeta ya silicone yagutse ntigomba gushingira gusa kubyimbye; isuzuma ryuzuye ririmo ubujyakuzimu, ubukana, nigipimo gihoraho cyo kugabanuka. Birasabwa kubona imbaraga zo guhonyora - guhindagura umurongo uva kumurongo.
Ikiburanwa cya 3: Nubwo bigaragara nkimpeta yumukara wumukara, imikorere yabo ya flame retardant iratandukanye cyane.
Umukiriya wa sitasiyo yishyuza yasabye UL94 V - 0 icyemezo cya flame retardancy icyemezo. Baguze icyiciro cyimpeta ya silicone yumukara kumasoko, yashoboraga kuzimwa no mugihe cyizamini cyoroshye. Ubushakashatsi bwakozwe bwerekanye ko mu kizamini cyo gutwika gihagaritse, ibitonyanga byaka biva mu ngero byateje ipamba yinjiza-imyitwarire ibujijwe hakurikijwe V-0.
Kubera iki? Kuberako silicone isanzwe ifitemo ibintu bike gusa bigabanya umuriro cyangwa ikoresha halogene - ishingiye ku gucana umuriro (byangiza ibidukikije kandi bikunze guterwa n'ubushyuhe bwinshi). Impeta ya V - 0 yemewe impeta ya silicone isaba sisitemu ya halogen idafite flame retardant sisitemu, imiterere ya selile imwe, kandi nta gutonyanga ibicuruzwa mugihe cyo gutwikwa.
Duha abakiriya verisiyo yemewe kuri UL94 V - 0, yubahiriza amabwiriza ya RoHS na REACH, kandi tumaze gutsinda ikizamini cya flame inshinge hamwe nikizamini gishyushye. Nubwo ikiguzi kiri hejuru ya 20% kurenza iyisanzwe, verisiyo yumutekano ningirakamaro kubikoresho bifite ingufu nyinshi nka sitasiyo zishyuza.
Impanuro: Niba ibicuruzwa birimo umutekano w'amashanyarazi (ingufu nshya, ibikoresho byo murugo, inzira ya gari ya moshi), ni ngombwa kubona raporo yerekana icyemezo cyo kutagira umuriro aho gushingira gusa ku bimenyetso bifatika.
Inama nyinshi, pls twandikire.