Rufin Filastik Don Karfe

Rubutun filastik don tsarin ƙarfe shine yin amfani da Layer na filastik a saman sassan ƙarfe, wanda ke ba su damar riƙe ainihin halayen ƙarfe yayin da suke samar da wasu kaddarorin filastik, kamar juriya na lalata, juriya, juriya, rufin lantarki, da kai. - shafawa. Wannan tsari yana da matukar mahimmanci wajen faɗaɗa kewayon samfuran aikace-aikacen da haɓaka ƙimar tattalin arzikinsu.

Hanyoyi don suturar filastik don karfe

Akwai hanyoyi da yawa don shafan filastik, gami da fesa harshen wuta, gado mai ruwa spraying, foda electrostatic spraying, zafi narke shafi, da kuma dakatar shafi. Hakanan akwai nau'ikan robobi da yawa waɗanda za'a iya amfani da su don sutura, tare da PVC, PE, da PA sune mafi yawan amfani. Filastik ɗin da ake amfani da shi don sutura dole ne ya kasance cikin foda, tare da ƙarancin raga na 80-120.

Bayan shafa, yana da kyau a hanzarta kwantar da kayan aikin ta hanyar nutsewa cikin ruwan sanyi. Saurin sanyaya cikin sauri zai iya rage crystallinity na rufin filastik, ƙara yawan ruwa, inganta ƙarfi da haske na rufin, ƙara haɓakawa, da shawo kan ɓarna mai lalacewa ta hanyar damuwa na ciki.

Don inganta mannewa tsakanin shafi da tushe karfe, saman workpiece ya kamata ya zama ƙura-free da bushe, ba tare da tsatsa da maiko kafin shafi. A mafi yawan lokuta, da workpiece bukatar sha surface jiyya. Hanyoyin magani sun haɗa da fashewar yashi, maganin sinadarai, da sauran hanyoyin inji. Daga cikin su, sandblasting yana da sakamako mafi kyau yayin da yake roughens surface na workpiece, kara da surface yankin da kafa ƙugiya, don haka inganta mannewa. Bayan yashi yashi, ya kamata a busa saman aikin da iska mai tsabta don cire ƙura, kuma filastik ya kamata a rufe shi cikin sa'o'i 6, in ba haka ba, saman zai oxidize, yana shafar mannewa na shafi.

riba

Rufe kai tsaye tare da filastik foda yana da fa'idodi masu zuwa:

• Ana iya amfani da shi tare da resins waɗanda ke samuwa kawai a cikin foda.
• Za a iya samun sutura mai kauri a cikin aikace-aikace ɗaya.
• Za a iya lulluɓe samfuran tare da sifofi masu rikitarwa ko kaifi mai kaifi.
• Yawancin robobin foda suna da kyakkyawan kwanciyar hankali na ajiya. 
• Ba a buƙatar masu kaushi ba, yin tsari na shirye-shiryen abu mai sauƙi. Duk da haka, akwai kuma wasu drawbacks ko gazawa ga foda shafi. Misali, idan kayan aikin yana buƙatar preheated, girmansa zai iyakance. Saboda tsarin sutura yana ɗaukar lokaci, don manyan kayan aiki masu girma, yayin da ba a gama fesa ba, wasu yankuna sun riga sun sanyaya ƙasa da zafin jiki da ake buƙata. A lokacin aikin gyaran gyare-gyare na filastik, asarar foda zai iya zama kamar 60%, don haka dole ne a tattara shi kuma a sake amfani dashi don saduwa da bukatun tattalin arziki.

Fesa harshen wuta 

Flame spraying roba shafi ga karfe tsari ne da ya shafi narkewa ko wani bangare narke foda ko roba mai laushi tare da harshen wuta da ke fitowa daga bindigar feshi, sannan a fesa narkakkar robobin a saman wani abu don ya zama abin rufe fuska. Kauri daga cikin rufi yawanci tsakanin 0.1 da 0.7 mm. Lokacin amfani da filastik foda don fesa harshen wuta, aikin aikin ya kamata a preheated. Ana iya yin zafi a cikin tanda, kuma zafin zafin jiki ya bambanta depea kan nau'in filastik da ake fesa.

Dole ne a sarrafa zafin zafin wuta a lokacin fesa, saboda yawan zafin jiki na iya ƙonewa ko lalata filastik, yayin da ƙananan zafin jiki na iya shafar mannewa. Gabaɗaya, zafin jiki ya fi girma yayin fesa layin farko na filastik, wanda zai iya inganta mannewa tsakanin ƙarfe da filastik. Yayin da ake fesa yadudduka na gaba, ana iya rage yawan zafin jiki kaɗan. Nisa tsakanin bindigar fesa da kayan aikin ya kamata ya kasance tsakanin 100 da 200 cm. Domin lebur workpieces, da workpiece kamata a sanya a kwance da kuma fesa gun ya kamata a koma baya da kuma gaba; na silinda ko na ciki bore workpieces, ya kamata a saka su a kan lathe don juyawa fesa. Matsakaicin saurin aikin aikin juyawa yakamata ya kasance tsakanin 20 zuwa 60 m/min. Bayan an sami kauri da ake buƙata na rufin, ya kamata a dakatar da feshi kuma aikin ya kamata ya ci gaba da juyawa har sai narkakken filastik ya ƙarfafa, sannan ya kamata a sanyaya cikin sauri.

Ko da yake harshen wuta spraying yana da in mun gwada da low samar yadda ya dace da kuma ya shafi yin amfani da m iskar gas, shi ne har yanzu wani muhimmin aiki hanya a cikin masana'antu saboda ta low kayan aiki zuba jari da kuma tasiri a shafi ciki na tankuna, kwantena, da kuma manyan workpieces idan aka kwatanta da sauran hanyoyin. .

Tufafin Filastik Mai Ruwa Mai Ruwa

Ka'idar aiki na rufin gado mai laushi mai laushi don karfe shine kamar haka: ana sanya foda mai launi na filastik a cikin akwati na cylindrical tare da wani yanki mai laushi a saman wanda ke ba da damar iska kawai ta wuce, ba foda ba. Lokacin da matsewar iska ta shiga daga kasan kwandon, sai ta busa foda sama sannan ta dakatar da ita a cikin kwandon. Idan an nutsar da kayan aikin da aka rigaya a cikinsa, foda na guduro zai narke kuma ya manne da kayan aikin, yana samar da sutura.

Kaurin rufin da aka samu a cikin gadon ruwa depends akan zafin jiki, takamaiman ƙarfin zafi, ƙimar ƙasa, lokacin fesawa, da nau'in filastik da aka yi amfani da shi lokacin da kayan aikin ya shiga ɗakin ruwa. Duk da haka, kawai zafin jiki da lokacin fesa na workpiece za a iya sarrafawa a cikin tsari, kuma suna buƙatar ƙaddara ta gwaje-gwaje a cikin samarwa.

A lokacin tsomawa, ana buƙatar foda ɗin filastik ta gudana cikin sauƙi kuma a ko'ina, ba tare da haɓakawa ba, kwararar vortex, ko ƙetare ɓarke ​​​​na ƙwayoyin filastik. Ya kamata a dauki matakan da suka dace don biyan waɗannan buƙatun. Ƙara na'ura mai tayar da hankali zai iya rage haɓakar haɓakawa da haɓakar vortex, yayin da ƙara ƙaramin ƙwayar talcum zuwa foda na filastik yana da amfani ga ruwa, amma yana iya rinjayar ingancin sutura. Don hana tarwatsa barbashi na filastik, ƙimar iska da daidaituwar ƙwayoyin foda na filastik yakamata a sarrafa su sosai. Duk da haka, wasu tarwatsawa ba makawa ne, don haka ya kamata a shigar da na'urar farfadowa a cikin ɓangaren sama na gado mai ruwa.

Abubuwan da ke tattare da lullubin gadon filasta mai ruwa mai ruwa shine ikon yin suturar kayan aiki masu rikitarwa, babban ingancin sutura, samun sutura mai kauri a cikin aikace-aikacen guda ɗaya, ƙarancin ƙarancin guduro, da yanayin aiki mai tsabta. Rashin lahani shine wahalar sarrafa manyan kayan aiki.

Electrostatic spraying filastik shafi don karfe

A electrostatic spraying, guduro roba shafi foda aka gyarawa a saman workpiece da electrostatic karfi, maimakon ta narkewa ko sintering. Ka'idar ita ce a yi amfani da filin lantarki da aka kafa ta babban janareta na lantarki mai ƙarfin lantarki don cajin foda da aka fesa daga bindigar da aka fesa tare da wutar lantarki a tsaye, kuma aikin da aka yi ƙasa ya zama babban ƙarfin lantarki mai inganci. A sakamakon haka, wani Layer na uniform filastik foda da sauri ajiya a kan saman workpiece. Kafin cajin ya ɓace, ɗigon foda yana manne da ƙarfi. Bayan dumama da sanyaya, ana iya samun suturar filastik iri ɗaya.

Foda electrostatic spraying an ɓullo da a tsakiyar 1960s kuma yana da sauƙin sarrafa kansa. Idan rufi ba ya bukatar ya zama lokacin farin ciki, electrostatic spraying baya bukatar preheating na workpiece, don haka za a iya amfani da zafi-m kayan ko workpieces cewa ba dace da dumama. Hakanan baya buƙatar babban akwati na ajiya, wanda ke da mahimmanci a cikin feshin gado mai ruwa. Foda da ke ƙetare kayan aikin yana jawo hankalin bayan aikin, don haka adadin overspray ya ragu da yawa fiye da sauran hanyoyin fesa, kuma ana iya shafa dukkan aikin ta hanyar fesa gefe ɗaya. Koyaya, manyan kayan aikin har yanzu suna buƙatar fesa daga ɓangarorin biyu.

Kayan aiki tare da sassan giciye daban-daban na iya haifar da matsaloli don dumama na gaba. Idan bambance-bambancen ɓangaren giciye ya yi girma sosai, ɓangaren mai kauri na rufin bazai iya kaiwa ga zafin jiki ba, yayin da ɓangaren bakin ciki ya riga ya narke ko ya lalace. A wannan yanayin, kwanciyar hankali na thermal na resin yana da mahimmanci.

Abubuwan da ke da sasanninta masu kyau na ciki da ramuka masu zurfi ba su da sauƙi a rufe su ta hanyar feshin electrostatic saboda waɗannan wuraren suna da garkuwar lantarki da r.epel foda, yana hana suturar shiga sasanninta ko ramuka sai dai idan za a iya shigar da bindigar feshi a cikin su. Bugu da kari, electrostatic spraying na bukatar finer barbashi saboda ya fi girma barbashi ne mafi kusantar su rabu daga workpiece, kuma barbashi mafi kyau fiye da 150 raga sun fi tasiri a electrostatic mataki.

Hanyar shafa mai zafi

Ka'idar aiki ta hanyar shafa mai zafi ita ce fesa foda mai rufin filastik akan kayan aikin da aka riga aka gama ta amfani da bindigar feshi. Filastik ɗin yana narkewa ta hanyar amfani da zafin kayan aikin, kuma bayan sanyaya, ana iya amfani da murfin filastik akan aikin. Idan ya cancanta, ana kuma buƙatar magani bayan dumama.

Makullin don sarrafa tsari mai narkewa mai zafi shine zafin zafin jiki na aikin aikin. Lokacin da zafin jiki na preheating ya yi yawa, yana iya haifar da oxidation mai tsanani na saman karfe, rage mannewar rufin, kuma yana iya haifar da bazuwar guduro da kumfa ko canza launi na rufin. Lokacin da preheating zafin jiki ya yi ƙasa da, guduro yana da matalauta flowability, sa da wuya a samu wani uniform shafi. Sau da yawa, aikace-aikacen fesa guda ɗaya na hanyar shafa mai zafi ba zai iya cimma kauri da ake so ba, don haka ana buƙatar aikace-aikacen fesa da yawa. Bayan kowace aikace-aikacen fesa, maganin dumama ya zama dole don narke gaba ɗaya da haskaka murfin kafin yin amfani da Layer na biyu. Wannan ba wai kawai yana tabbatar da suturar uniform da santsi ba amma kuma yana inganta ƙarfin injin. Matsakaicin zafin magani na dumama don polyethylene mai girma yana kusa da 170 ° C, kuma ga polyether chlorinated, yana kusa da 200 ° C, tare da shawarar lokaci na awa 1.

Hanyar narke mai zafi yana haifar da inganci mai kyau, mai daɗi, mai ƙarfi da haɗin gwiwa tare da ƙarancin ƙarancin guduro. Yana da sauƙin sarrafawa, yana da ƙamshi kaɗan, kuma bindigar feshi da ake amfani da ita tana yi.

Sauran hanyoyin da ake samu don suturar filastik don karfe

1. Spraying: Cika dakatar a cikin tafki gun fesa da kuma amfani da matsawa iska tare da ma'aunin ma'auni wanda bai wuce 0.1 MPa zuwa ko'ina fesa shafi a saman da workpiece. Don rage asarar dakatarwa, ya kamata a kiyaye karfin iska a matsayin ƙasa mai yiwuwa. Ya kamata a kiyaye nisa tsakanin kayan aiki da bututun ƙarfe a 10-20 cm, kuma ya kamata a kiyaye farfajiyar fesa daidai da hanyar kwararar kayan.

2. Immersion: nutsar da workpiece a cikin dakatarwa na 'yan dakiku, sannan cire shi. A wannan gaba, wani Layer na dakatarwa zai manne da saman kayan aikin, kuma ruwan da ya wuce gona da iri zai iya gudana ta dabi'a. Wannan hanya ta dace da ƙananan kayan aiki masu girma waɗanda ke buƙatar cikakken shafi akan farfajiyar waje.

3. Yin gogewa: gogewa ya haɗa da yin amfani da buroshin fenti ko goga don amfani da dakatarwa akan saman aikin, ƙirƙirar sutura. Brushing ya dace da shafi na gaba ɗaya ko shafi mai gefe ɗaya akan kunkuntar saman. Duk da haka, yana da wuya a yi amfani da shi saboda sakamakon rashin santsi kuma har ma da saman bayan an bushe murfin, da iyakancewa akan kauri na kowane Layer Layer.

4. Zuba: Zuba dakatarwa a cikin wani aiki mai juyawa mai zurfi, tabbatar da cewa an rufe saman ciki gaba ɗaya ta hanyar dakatarwa. Sa'an nan kuma, zubar da ruwa mai yawa don samar da sutura. Wannan hanya ya dace da shafi kananan reactors, bututun, gwiwar hannu, bawuloli, famfo casings, tees, da sauran irin wannan workpieces.