Izixhobo eziphambili zokuvelisa ukubumba yi-hydraulic press. Indima yomatshini wokucinezela we-hydraulic kwinkqubo yokucinezela kukufaka uxinzelelo kwiplastiki nge-mold, ukuvula i-mold kunye nokukhupha imveliso.
Ukubumba ngokucinezelwa kusetyenziswa kakhulu ekubumbeni iiplastiki ezisebenzisa i-thermosetting. Kwi-thermoplastics, ngenxa yesidingo sokulungisa isithuba esingenanto kwangaphambili, kufuneka sifudunyezwe kwaye sipholiswe ngokutshintshana, ukuze umjikelo wemveliso ube mde, ukusebenza kakuhle kwemveliso kuphantsi, kwaye ukusetyenziswa kwamandla kukhulu. Ngaphezu koko, iimveliso ezineemilo ezinzima kunye nobukhulu obuchanekileyo azinakucinezelwa. Yiyo loo nto kukho umkhwa oqhelekileyo wokubumba ngenaliti ngendlela engabizi kakhulu.
Iumatshini wokubumba ucinezelo(ucinezelo olufutshane) olusetyenziselwa ukubumba yi-hydraulic press. Umthamo wayo wokucinezela ubonakaliswa nge-tonnage eqhelekileyo, ngokubanzi, kukho i-40t ﹑ 630t ﹑ 100t ﹑ 160t ﹑ 200t ﹑ 250t ﹑ 400t ﹑ 500t series of presses. Kukho iitoni ezingaphezu kwe-1,000 ze-multi-layer presses. Izinto eziphambili ezikwiinkcukacha ze-press ziquka i-operating tonnage, i-ejection tonnage, ubungakanani beplaten bokulungisa idayethi, kunye nokubethelwa kwe-operating piston kunye ne-ejection piston, njl. Ngokubanzi, ii-templates eziphezulu nezisezantsi ze-press zixhotyiswe ngezixhobo zokufudumeza nezokupholisa. Iindawo ezincinci zingasebenzisa i-cold press (akukho kufudumeza, ngamanzi okupholisa kuphela) ukuze zibumbe kwaye zipholise. Sebenzisa i-heating press kuphela kwi-thermal plasticization, enokonga amandla.
Ngokwezinga lokuzenzekelayo, oomatshini bokushicilela banokwahlulwahlulwa babe zii-hand press, ii-semi-automatic press, kunye nee-automatic press ezizenzekelayo ngokupheleleyo. Ngokwenani leeleya zepleyiti ethe tyaba, banokwahlulwa babe zii-press ezineeleya ezimbini kunye nee-multilayer.
I-hydraulic press ngumatshini woxinzelelo osebenza nge-hydraulic transmission. Xa ucinezela, iplastiki yongezwa kuqala kwi-mold evulekileyo. Emva koko yongeza ioyile yoxinzelelo kwisilinda esisebenzayo. Ikhokelwa yikholamu, i-piston kunye nomqadi oshukumayo ziya ezantsi (okanye phezulu) ukuze zivale i-mold. Ekugqibeleni, amandla aveliswa yi-hydraulic press adluliselwa kwi-mold aze asebenze kwiplastiki.
Iplastiki engaphakathi kwisikhunta iyanyibilika ize ithambe xa ishushu. Isikhunta sizaliswa luxinzelelo oluvela kwi-hydraulic press kwaye kwenzeka i-chemical reaction. Ukuze kukhutshwe umswakama kunye nezinye izinto eziguquguqukayo eziveliswa ngexesha le-condensation reaction yeplastiki kwaye kuqinisekiswe umgangatho wemveliso, kuyimfuneko ukunciphisa uxinzelelo kunye nokukhupha umoya. Ukunyusa nokugcina ngoko nangoko. Ngeli xesha, i-resin eplastikini iyaqhubeka nokudlula kwii-chemical reactions. Emva kwexesha elithile, imeko eqinileyo enganyibilikiyo nengangeniyo iyenziwa, kwaye i-solidification molding igqityiwe. I-mold ivulwa ngoko nangoko, kwaye imveliso ikhutshwa kwi-mold. Emva kokuba i-mold icociwe, umjikelo olandelayo wemveliso ungaqhubeka.
Kuyabonakala kule nkqubo ingentla ukuba ubushushu, uxinzelelo, kunye nexesha ziimeko ezibalulekileyo zokubumba ucinezelo. Ukuze kuphuculwe imveliso yomatshini kunye nokhuseleko kunye nokuthembeka komsebenzi, isantya sokusebenza komatshini sikwayinto ebalulekileyo engenakuyekiswa. Ke ngoko, i-hydraulic press yeplastiki esetyenziselwa ukucinezela kufuneka ikwazi ukuhlangabezana neemfuno ezisisiseko ezilandelayo:
① Uxinzelelo oluxinzelelweyo kufuneka lwanele kwaye luhlengahlengiswe, kwaye kufuneka lufikelele kwaye lugcine uxinzelelo olumiselweyo kwixesha elithile.
② Umqadi oshukumayo we-hydraulic press ungama uze ubuye nangaliphi na ixesha xa ubetha. Oku kuyimfuneko kakhulu xa ufaka ii-molds, ucinezela kwangaphambili, utshaja lwebhetshi, okanye ukusilela.
③ Umqadi oshukumayo we-hydraulic press unokulawula isantya kwaye usebenzise uxinzelelo olusebenzayo nangaliphi na ixesha lokubetha. Ukuhlangabezana neemfuno ze-molds ezinobude obahlukeneyo.
Umqadi oshukumayo we-hydraulic press kufuneka ube nesantya esikhawulezayo kwi-stroke engenanto ngaphambi kokuba i-mold yesilisa ichukumise iplastiki, ukuze kufinyezwe umjikelo wokucinezela, kuphuculwe imveliso yomatshini kwaye kuthintelwe ukunciphisa okanye ukuqina kokusebenza kokuhamba kweplastiki. Xa i-mold yesilisa ichukumisa iplastiki, isantya sokuvala i-mold kufuneka sincitshiswe. Ngaphandle koko, i-mold okanye i-insert inokonakala okanye umgubo unokususwa kwi-mold yesifazane. Kwangaxeshanye, ukunciphisa isantya kunokususa ngokupheleleyo umoya kwi-mold.
Ixesha lokuthumela: Epreli-07-2023
