LITLHAHISO TSA HO TEREKISETSA THERMOPLASTICS

Tjheseletsa ke mokhoa oa ho kopanya bokaholimo ka ho ba nolofatsa ka mocheso. Ha ho chesoa thermoplastics, e 'ngoe ea likarolo tsa bohlokoa ke thepa ka boeona. Hobane haesale ho ntse ho chesoa ka polasetiki batho ba bangata ba ntse ba sa utloisise metheo ea mantlha, e bohlokoa haholo ho weld e nepahetseng.
Molao oa pele oa ho tjheseletsa li-thermoplastics ke hore o tlameha ho chesa joaloka polasetiki ho rata-polasetiki. E le hore u fumane tšepe e matla, e lumellanang, ho hlokahala hore u netefatse hore substrate ea hau le molamu oa hau oa tšepe li tšoana hantle; mohlala, polypropylene ho polypropylene, polyurethane ho polyurethane, kapa polyethylene ho polyethylene.
Malebela ke ana bakeng sa ho tjheseletsa mefuta e fapaneng ea polasetiki le mehato ea ho netefatsa weld e nepahetseng.
Ho tjheseletsa Polypropylene
Polypropylene (PP) ke e 'ngoe ea li-thermoplastics tse bonolo ho li chesa' me e sebelisetsoa lits'ebetso tse fapaneng tse fapaneng. PP e na le khanyetso e ntle ea lik'hemik'hale, matla a khoheli a tlase, matla a phahameng a ho tensile ebile ke polyolefin e tsitsitseng ka ho fetisisa. Likopo tse netefalitsoeng tse sebelisang PP ke lisebelisoa tsa ho roala, litanka, li-ductwork, li-etcher, li-fume hoods, scrubbers le orthopedics.
Bakeng sa ho tjheseletsa maq, litšepe tsa welder li hloka ho beoa ho 572 ° F / 300 ° C; ho khetholla mocheso oa hau ho tla itšetleha ka hore na u reka sesebelisoa sa mofuta ofe le litlhahiso tse tsoang ho moetsi. Ha u sebelisa sesebelisoa sa ho chesa mocheso se nang le karolo ea ho futhumatsa ea volt ea 500 watt 120, taolo ea moea e lokela ho beoa ho 5 psi le rheostat ho 5. Ka ho etsa mehato ena, o lokela ho ba haufi le 572 ° F / 300 ° C.
Tjheseletsa nhua polyethylene
Thermoplastic e 'ngoe e bonolo ho e cheseletsa ke polyethylene (PE). Polyethylene ke ho hanyetsa tšusumetso, e na le khanyetso e ikhethileng ea abrasion, matla a phahameng a ho tensile, e khona ho sebetsa ebile e na le monya metsi a tlase. Likopo tse netefalitsoeng tsa PE ke lijana le liners, litanka, likepe tsa laboratori, liboto tsa ho itšeha le li-slide.
Molao oa bohlokoahali mabapi le ho tjheseletsa polyethylene ke hore o ka cheseletsa tlase ho ea holimo empa eseng holimo ho ea tlase. Ho bolelang, o ka chesa molamu o tlase oa polyethylene (LDPE) molamu ho palo e phahameng ea polyethylene (HDPE) empa eseng ka lehlakoreng le leng. Lebaka la ho ba bonolo. Ho phahama ha letsoalo ho ba thata le ho feta ho senya likarolo tsa tšepe. Haeba likarolo li ke ke tsa senyeha ka sekhahla se ts'oanang, li ke ke tsa kopana hantle. Ntle le ho etsa bonnete ba hore matšoenyeho a hau aa tsamaellana, polyethylene ke polasetiki e bonolo haholo ho e kopanya. Ho tjheseletsa LDPE o hloka mocheso o ka bang 518 ° F / 270 ° C, molaoli o behiloe ho 5-1 / 4 ho isa 5-1 / 2 le rheostat ho 5. Joalo ka PP, HDPE e ka ts'oaroa ka 572 ° F / 300 ° C.
Malebela bakeng sa li-Welds tse nepahetseng
Pele ho chesoa thermoplastics, ho na le mehato e 'maloa e bonolo e hlokang ho nkuoa ho netefatsa weld e nepahetseng. Hloekisa bokaholimo bohle, ho kenyeletsoa le molamu oa tšepe, ka MEK kapa sesebelisoa se ts'oanang. Koahela substrate e kholo ka ho lekana ho amohela molamu oa ho tjheseletsa ebe o khaola pheletso ea molamu oa tjheseletsa ho ea ho 45 °. Hang ha litšepe li ntse li ikamahanya le mocheso o loketseng, o hloka ho lokisetsa substrate le molamu oa ho tjheseletsa. Ka ho sebelisa lebelo le iketsang lebelo u etsa mosebetsi o mongata oa boitokisetso pele.
Ho tšoara litšepe ka lisenthimithara ka holim'a substrate, kenya molamu ntlheng 'me u e tsamaise ka ho nyolla le ho theoha makhetlo a mararo ho isa ho a mane. Ho etsa sena ho tla futhumatsa molamu ha o ntse o futhumatsa substrate. Pontšo ea hore substrate e se e loketse ho ts'oaroa ke ha e qala ho ba le phello e fogging - e ts'oanang le ho letsa sengoathoana sa khalase.
U sebelisa khatello e tiileng le e sa fetoheng, sutumella tlase bootong ba ntlha. Botla e tla sutumetsa molamu oa welding ka substrate. Haeba u khetha ho etsa joalo, hang ha molamu oa tšepe o khomarela substrate, o ka tlohela molamu 'me o tla itsamaisa ka bo ona.
Boholo ba li-thermoplastics li na le lehlabathe mme matla a weld a ke ke a ameha ha a lehlabathe. U sebelisa sandpaper ea 60-grit, lehlabathe karolong e kaholimo ea sefaha sa tjheseletsa, ebe u sebetsa ho fihlela 360-grit sandpaper e metsi ho fumana qetello e hloekileng. Ha o sebetsa le polypropylene kapa polyethylene, ho a khonahala ho khutlisa bokaholimo ba bona bo benyang ka ho futhumatsa bokaholimo ka serumula se bulehileng sa lelakabe la propane. (Hopola hore lits'ebetso tse tloaelehileng tsa polokeho ea mollo li lokela ho lateloa.) Hang ha mehato ena e phethetsoe u lokela ho ba le tšepe e shebahalang e ts'oana le foto e ka tlase leqeleng.
Qetello

Ho boloka malebela a kaholimo kelellong, ho tjheseletsa thermoplastics e ka ba mokhoa o bonolo haholo oa ho ithuta. Lihora tse 'maloa tsa ho ikoetlisetsa ho tjheseletsa li tla fana ka "maikutlo" a ho boloka tokelo le khatello ea molamu e otlolohile ho fihla sebakeng sa weld. Ho leka mefuta e fapaneng ea polasetiki ho tla thusa ho tseba mokhoa ona. Bakeng sa lits'ebetso le litekanyetso tse ling, ikopanye le morekisi oa li-plastiki oa heno.


Nako ea poso: Oct-12-2020