Takaitaccen Bayani: Labarin ya yi cikakken bayani game da tasirin ingancin manne a cikin tsarin lamination. Bugu da ƙari, ya ambaci cewa maimakon yin hukunci kan aikin daidaita ta hanyar yin hukunci idan akwai'Farin tabo' ko 'kumfa', shine bayyanannen samfuran da aka lakafta wanda zai iya zama ma'aunin kimantawa na aikin daidaita manne.
1.Matsalar Kumfa da Daidaita Manne
Farin tabo, kumfa, da rashin bayyana gaskiya matsala ce ta ingancin kamanni a fannin sarrafa kayan haɗin kai. A mafi yawan lokuta, masu sarrafa kayan haɗin kai suna danganta matsalolin da ke sama da rashin daidaita manne!
1.1 Wannan manne ba shine manne ba
Masu sarrafa kayan haɗin gwiwa na iya mayar da ganga na manne da ba a buɗe ba da waɗanda ba a yi amfani da su ba ga masu samar da kayayyaki bisa ga hukuncin rashin daidaita manne, ko kuma shigar da ƙara ko ƙorafe-ƙorafe ga masu samar da kayayyaki.
Ya kamata a lura cewa manne da ake ganin ba shi da aikin daidaita manne, "maganin aiki na manne" ne wanda abokan ciniki suka shirya/suka narkar da shi kuma yana da ɗanko na takamaiman ƙima. Manne da aka dawo da shi shine bokitin manne na asali da ba a buɗe ba.
Waɗannan bokiti biyu na "manne" ra'ayoyi ne daban-daban da abubuwa!
1.2 Alamun kimantawa don daidaita manne
Alamomin fasaha don tantance aikin mannewa ya kamata su zama danko da kuma matsin lamba na jika saman. Ko kuma, "jikawar manne" haɗuwa ce ta "jikawar manne" da "jikawar manne".
A zafin ɗaki, matsin lamba na jika saman ethyl acetate kusan 26mN/m.
Yawan ganga na asali (ƙarfin abun ciki) na manne-manne polyurethane da aka yi amfani da su a fannin sarrafa kayan haɗin gwiwa gabaɗaya yana tsakanin 50% -80%. Kafin aiwatar da sarrafa kayan haɗin gwiwa, ana buƙatar a narkar da manne-manne da aka ambata a sama zuwa yawan aiki na kusan 20% -45%.
Saboda gaskiyar cewa babban abin da ke cikin maganin manne mai narkewa shine ethyl acetate, matsin lamba na jika saman maganin manne mai narkewa zai kasance kusa da matsin lamba na jika saman ethyl acetate da kansa.
Saboda haka, matuƙar matsin lamba na jika saman substrate ɗin da aka yi amfani da shi ya cika buƙatun asali na sarrafa haɗin gwiwa, danshi na manne zai yi kyau sosai!
Kimantawar ruwan manne shine danko. A fannin sarrafa kayan haɗin gwiwa, abin da ake kira danko (watau danko aiki) yana nufin lokacin da ruwan manne yake aiki lokacin da yake fitowa daga kofin danko, wanda aka auna ta amfani da takamaiman samfurin kofin danko. Ana iya la'akari da cewa ruwan manne da aka shirya daga nau'ikan manne na bokiti daban-daban yana da irin wannan "danko aiki", kuma "ruwan aikin" yana da irin wannan "danko mai aiki"!
A ƙarƙashin wasu yanayi marasa canji, ƙarancin "danko mai aiki" na "ruwan aiki" wanda aka shirya tare da manne iri ɗaya na firam, zai fi kyau "ruwan manne"!
Musamman ma, ga nau'ikan manne daban-daban, idan ƙimar danko na maganin aiki mai narkewa ya kai daƙiƙa 15, to maganin aiki da waɗannan nau'ikan manne suka shirya yana da "matakin manne" iri ɗaya.
1.3 Halayen daidaita manne siffa ce ta ruwan aiki na manne
Wasu barasa ba sa samar da ruwa mai ƙauri idan aka buɗe ganga, sai dai kamar jelly mai kama da harsashi wanda ba shi da ruwa. Ana buƙatar a narkar da su a narkar da su da isasshen adadin sinadarin sinadarai na halitta domin samun yawan manne da kuma ɗanɗanon da ake so.
A bayyane yake cewa aikin daidaita manne kimantawa ne na maganin aiki wanda aka tsara a cikin takamaiman "matsakaicin aiki", maimakon kimantawa na manne na ganga na asali wanda ba a narkar da shi ba.
Saboda haka, ba daidai ba ne a danganta rashin daidaiton manne ga halayen gama gari na wani nau'in manne na bokiti na asali!
2. Abubuwan da ke shafar matakin manne
Duk da haka, ga maganin aiki na manne da aka narkar, akwai bambance-bambance a matakin ruwan manne!
Kamar yadda aka ambata a baya, manyan alamomin tantance aikin daidaita ruwan aiki na mannewa sune tashin hankalin jika saman da kuma danko aiki. Alamar tashin hankalin jika saman ba ta nuna manyan canje-canje a cikin kewayon yawan aiki na yau da kullun ba. Saboda haka, ainihin rashin daidaitaccen matakin mannewa shine cewa yayin aiwatar da aikace-aikacen, danko na manne yana ƙaruwa ba bisa ƙa'ida ba saboda wasu dalilai, wanda ke haifar da raguwar aikin daidaita sa!
Wadanne abubuwa ne zasu iya haifar da canje-canje a cikin danko na manne yayin amfani da shi?
Akwai manyan abubuwa guda biyu da za su iya haifar da canje-canje a cikin danko na manne, ɗaya shine zafin manne, amma yawan mannen.
A cikin yanayi na yau da kullun, ɗanɗanon ruwa yana raguwa tare da ƙaruwar zafin jiki.
A kan littafin jagorar mai amfani da kamfanonin manne daban-daban suka bayar, yawanci ana nuna ƙimar danko na maganin manne (kafin da bayan dilution) wanda aka auna ta amfani da na'urar juyawa ko kofin danko a zafin ruwa na 20 ° C ko 25 ° C (watau zafin maganin manne da kansa).
A ɓangaren abokin ciniki, idan zafin ajiya na bokitin manne da mai diluent na asali (ethyl acetate) ya fi ko ƙasa da 20 ° C ko 25 ° C, zafin manne da aka shirya shi ma zai fi ko ƙasa da 20 ° C ko 25 ° C. A zahiri, ainihin ƙimar danko na manne da aka shirya shi ma zai yi ƙasa da ƙimar danko da aka nuna a cikin littafin. A lokacin hunturu, zafin manne da aka shirya zai iya zama ƙasa da 5 ° C, kuma a lokacin rani, zafin manne da aka shirya zai iya zama sama da 30 ° C!
Ya kamata a lura cewa ethyl acetate wani sinadari ne mai saurin canzawa na halitta. A lokacin da ake sarrafa ethyl acetate, zai sha zafi mai yawa daga ruwan manne da iskar da ke kewaye.
A halin yanzu, yawancin na'urorin laminating a cikin injunan haɗaka suna buɗe kuma suna da na'urorin shaye-shaye na gida, don haka adadi mai yawa na mai narkewa zai ƙafe daga faifan manne da ganga. A cewar abubuwan da aka lura, bayan wani lokaci na aiki, zafin ruwan manne da ke aiki a cikin tiren manne na iya zama ƙasa da 10 ° C fiye da zafin yanayi na kewaye!
Yayin da zafin manne ke raguwa a hankali, danko na manne zai ƙaru a hankali.
Don haka, aikin daidaita manne-manne ...
A wata ma'anar, idan kuna son kiyaye daidaiton matakin manne bisa ga narkewar ruwa, ya kamata ku yi amfani da mai sarrafa danko ko wata hanya makamancin haka don kiyaye danko mai mannewa ya tabbata a duk lokacin aiwatar da aikace-aikacen.
3. Alamun kimantawa don ingantaccen sakamakon daidaita manne
Kimanta sakamakon daidaita manne ya kamata ya zama siffa ta samfurin da aka haɗa a wani takamaiman mataki, kuma sakamakon daidaita manne yana nufin sakamakon da aka samu bayan an shafa manne. Kamar yadda "matsakaicin gudu" da aka tsara na mota yake da siffa ta samfurin, ainihin saurin tuƙi na abin hawa a kan hanya a ƙarƙashin takamaiman yanayi wani sakamako ne daban.
Kyakkyawan daidaita manne shine babban sharadin cimma sakamako mai kyau na daidaita manne. Duk da haka, kyakkyawan aikin daidaita manne ba lallai bane ya haifar da kyakkyawan sakamako na daidaita manne ba, kuma koda manne yana da ƙarancin aikin daidaita manne (watau babban danko), ana iya cimma kyakkyawan sakamako na daidaita manne a wasu yanayi.
4. Alaƙa tsakanin sakamakon daidaita manne da abubuwan da ke faruwa na "farin tabo" da "kumfa"
"Fararen tabo, kumfa, da bayyanawa" ba su da kyau sakamakon da ake samu a samfuran da aka haɗa. Akwai dalilai da yawa na matsalolin da ke sama, kuma rashin daidaiton manne ɗaya ne kawai daga cikinsu. Duk da haka, dalilin rashin daidaiton manne ba wai kawai saboda rashin daidaiton manne ba ne!
Rashin kyawun sakamako na manne ba lallai bane ya haifar da "farin tabo" ko "kumfa" ba, amma yana iya shafar bayyanannen fim ɗin. Idan ƙaramin madaidaicin substrate ɗin ya yi rauni, koda kuwa sakamakon daidaita manne ɗin yana da kyau, har yanzu akwai yiwuwar "farin tabo da kumfa".
Lokacin Saƙo: Janairu-17-2024