TAMBAYOYI DON ELULA THERMOPLASTICS

Welding tsari ne na haɗa saman ta lausasa su da zafi. Lokacin walda thermoplastics, ɗayan maɓallin kewayawa shine kayan da kanta. Tunda dai walda ta filastik ta kasance kusan mutane da yawa har yanzu ba su fahimci abubuwan yau da kullun ba, wanda ke da mahimmanci ga walda mai dacewa.
Dokar lamba daya ta walda thermoplastics ita ce dole ne ka walda kamar-filastik don son-roba. Domin samun walda mai karfi, mai daidaito, ya zama dole a tabbatar matattararka da sandar walda iri daya ne; misali, polypropylene zuwa polypropylene, polyurethane zuwa polyurethane, ko polyethylene zuwa polyethylene.
Anan akwai wasu nasihu don walda nau'ikan robobi daban daban da matakai don tabbatar da walda mai dacewa.
Welding propylene
Polypropylene (PP) yana ɗayan mafi saurin thermoplastics don walda kuma ana amfani dashi don aikace-aikace daban daban. PP yana da kyakkyawar juriya ta sinadarai, ƙananan takamaiman nauyi, ƙarfin ƙarfin ƙarfi kuma shine mafi daidaitaccen daidaitaccen polyolefin. Tabbatar da aikace-aikace da yin amfani da PP ake plating kayan aiki, tankuna, ductwork, etchers, fume hoods, scrubbers da orthopedics.
Domin walda PP, walda yana buƙatar saitawa a kusan 572 ° F / 300 ° C; tantance yawan zafin jikin ka zai ta'allaka ne da nau'in walda da ka siya da kuma shawarwarin daga masana'anta. Lokacin amfani da wani thermoplastic walda da 500 Watt 120 volt dumama rabi, da iska mai kayyadewa ya kamata a kafa a kimanin 5 psi da rheostat a 5. By yin wadannan matakai, ya kamata ka zama a cikin kusanci da 572 ° F / 300 ° C.
waldi Polyethylene
Wani sauƙi mai sauƙi na thermoplastic don walda shine polyethylene (PE). Polyethylene shine tasirin juriya, yana da tsayayyar juriya na abrasion, ƙarfin ƙarfi mai ƙarfi, yana da kyau kuma yana da ƙarancin shan ruwa. Tabbatar da aikace-aikace na PE ne bins da liners, tankuna, dakin gwaje-gwaje tasoshi, sabon allon da nunin faifai.
Mafi mahimmanci doka game da walda polyethylene shine cewa zaka iya walda ƙasa zuwa sama amma ba babba zuwa ƙasa ba. Ma'ana, za ka iya Weld low yawa polyethylene (LDPE) waldi sanda zuwa high yawa polyethylene (HDPE) takardar amma ba sabanin haka ba. Dalilin kasancewarsa mai sauki ne. Matsayi mafi girma shine mafi wahalarwa shine ragargaza abubuwan haɗin don walda. Idan abubuwan da aka gyara ba za su iya karyewa a daidai wannan matakin ba to ba za su iya hadewa yadda ya kamata ba. Baya ga tabbatar yawancinku sun dace, polyethylene kyakkyawa ce mai sauƙi don walda. Don walƙiyar LDPE kana buƙatar samun yanayin zafin jiki a kusan 518 ° F / 270 ° C, mai sarrafawa ya saita aƙalla 5-1 / 4 zuwa 5-1 / 2 da kuma rheostat a 5. Kamar PP, HDPE yana da walda a 572 ° F / 300 ° C.
Nasihu don Weld Mai Kyau
Kafin walda thermoplastics, akwai 'yan matakai masu sauki da ake buƙatar ɗauka don tabbatar da walda mai dacewa. Tsaftace dukkan samfuran, gami da sandar waldi, tare da MEK ko wani abu mai narkewa. Girgiza mai girman girman da zai iya karɓar sandar waldi sannan ka yanke ƙarshen sandar walwar zuwa kusurwar 45 °. Da zarar da walda ya gyara ga dace da zazzabi, kana bukatar ka Prep substrate da waldi sanda. Ta amfani da wani atomatik gudun tip da yawa daga cikin Prep aikin da aka yi muku.
Riƙe welder ɗin kamar inci sama da matattarar, saka sandar waldi a cikin tip ɗin ka motsa shi cikin motsi sama da ƙasa sau uku zuwa huɗu. Yin wannan zai zafin sandar walda yayin dumama bututun. Nunin cewa an shirya zaren a walda shi ne lokacin da ya fara samun hazo - mai kama da busawa a wani gilashi.
Yin amfani da tabbataccen daidaitaccen matsin lamba, danna kan but din butar. Boot din zai tura sandar waldi cikin matatar. Idan ka zabi, da zarar sandar waldi ta manne wa matattarar, zaka iya barin sandar kuma zata dauke kanta kai tsaye.
Yawancin thermoplastics suna da yashi kuma ƙarfin walda ba zai shafi lokacin da aka yi sanded ba. Amfani da sandar sandar-grit 60, yashi daga saman ɓangaren walda ɗin waldi, sa'annan kayi aiki har zuwa 360-grit rigar sandpaper don samun tsabtace tsabta. Lokacin aiki tare da polypropylene ko polyethylene, yana yiwuwa a sake dawo da farfajiyar su mai sheƙi ta hanyar ɗauke saman wuta da ruwan wuta mai haske. (Ka tuna cewa ya kamata a bi hanyoyin aminci na wuta koyaushe.) Da zarar an kammala waɗannan matakan ya kamata ka sami walda mai kama da hoton a ƙasan hagu.
Kammalawa

Tsayawa sama tips a hankali, waldi thermoplastics iya zama fairly sauki tsari zuwa koyi. Aan awanni na aikin walda zai ba da “ji” don riƙe madaidaiciya har ma da matsi kan sandar kai tsaye zuwa yankin weld ɗin. Kuma yin gwaji akan nau'ikan filastik daban-daban zai taimaka wajan sanin aikin. Don wasu hanyoyin da ƙa'idodi, tuntuɓi mai rarraba robobi na gida.


Post lokaci: Oct-12-2020