I-ABS, eyaziwa ngokuba yi-acrylonitrile butadiene styrene, yenziwe yi-copolymerization yee-monomers ezintathu ze-acrylonitrile-butadiene-styrene. Ngenxa yobungakanani obahlukeneyo bee-monomers ezintathu, kunokubakho iipropati ezahlukeneyo kunye nobushushu bokunyibilika, ukusebenza kokuhamba kwe-ABS, ukuxuba nezinye iiplastiki okanye izongezo, kunokwandisa ukusetyenziswa kunye nokusebenza kwe-ABS.
Ukutyibilika kwe-ABS kuphakathi kwe-PS kunye ne-PC, kwaye ukutyibilika kwayo kunxulumene nobushushu be-injection kunye noxinzelelo, kwaye impembelelo yoxinzelelo lwe-injection inkulu kancinci. Ke ngoko, uxinzelelo oluphezulu lwe-injection luhlala lusetyenziswa ekubumbeni ukunciphisa i-melt viscosity kunye nokuphucula ukusebenza kokuzaliswa kwe-mold.
1. Ukulungiswa kweplastiki
Izinga lokufunxwa kwamanzi le-ABS limalunga ne-0.2%-0.8%. Kwi-ABS yodidi oluqhelekileyo, kufuneka ibhakwe kwi-oven kwi-80-85°C iiyure ezi-2-4 okanye kwi-drying hopper kwi-80°C iiyure ezi-1-2 ngaphambi kokuba icutshungulwe. Kwi-ABS enganyangekiyo kubushushu equlethe izinto zePC, ubushushu bokomisa kufuneka bunyuswe ngokufanelekileyo bube yi-100°C, kwaye ixesha elithile lokomisa linokugqitywa ngokuphuma komoya.
Umlinganiselo wezinto ezisetyenzisiweyo awunakudlula i-30%, kwaye i-ABS ye-electroplating grade ayinakusebenzisa izinto ezisetyenzisiweyo.
2. Ukukhetha umatshini wokubumba ngenaliti
Umatshini wokubumba inaliti oqhelekileyo kaRamada unokukhethwa (umlinganiselo wobude beskrubu ukuya kububanzi obuyi-20:1, umlinganiselo woxinzelelo ongaphezulu kwe-2, uxinzelelo lwenaliti olungaphezulu kwe-1500bar). Ukuba kusetyenziswa umbala we-masterbatch okanye imbonakalo yemveliso iphezulu, isikrubu esinobubanzi obuncinci sinokukhethwa. Amandla okubamba amiselwa ngokwe-4700-6200t/m2, exhomekeke kudidi lweplastiki kunye neemfuno zemveliso.
3. Uyilo lweMold kunye nesango
Ubushushu bokubumba bunokubekwa kwi-60-65°C. Ububanzi be-runner yi-6-8mm. Ububanzi besango bumalunga ne-3mm, ubukhulu bufana nobo bemveliso, kwaye ubude besango bufanele bube ngaphantsi kwe-1mm. Umngxuma womoya ubanzi yi-4-6mm kwaye ubukhulu buyi-0.025-0.05mm.
4. Ubushushu bokunyibilika
Ingachongwa ngokuchanekileyo ngendlela yokufaka umoya. Iindidi ezahlukeneyo zinobushushu obahlukeneyo bokunyibilika, izicwangciso ezicetyiswayo zezi zilandelayo:
Umgangatho wempembelelo: 220°C-260°C, kungcono ukuba ibe yi-250°C
Udidi lokufaka i-electroplating: 250°C-275°C, kungcono ukuba ibe yi-270°C
Udidi olumelana nobushushu: 240°C-280°C, kungcono ukuba ibe yi-265°C-270°C
Udidi oluthintela ilangatye: 200°C-240°C, kungcono ukuba ibe yi-220°C-230°C
Udidi olucacileyo: 230°C-260°C, kungcono ukuba ibe yi-245°C
Iglasi eqinisiweyo yefayibha: 230℃ -270℃
Kwiimveliso ezifuna umgangatho ophezulu, sebenzisa ubushushu obuphezulu bokunyibilika kunye nobushushu bokubumba.
5. Isantya sokujova
Isantya esicothayo sisetyenziselwa umgangatho omelana nomlilo, kwaye isantya esikhawulezayo sisetyenziselwa umgangatho omelana nobushushu. Ukuba iimfuno zomphezulu wemveliso ziphezulu, kufuneka kusetyenziswe ulawulo lwesantya sokujova ngenaliti olunesantya esiphezulu nolunezigaba ezininzi.
6. Uxinzelelo lomqolo
Ngokubanzi, xa uxinzelelo lomqolo luphantsi, kokukhona kungcono. Uxinzelelo lomqolo olusetyenziswa rhoqo yi-5bar, kwaye izinto zokudaya zifuna uxinzelelo lomqolo oluphezulu ukuze umbala uxutywe ngokulinganayo.
7. Ixesha lokuhlala
Kwiqondo lobushushu elingama-265°C, ixesha lokuhlala kwe-ABS kwisilinda enyibilikayo akufuneki lidlule imizuzu emi-5-6 ubuncinci. Ixesha elithintela ilangatye lifutshane. Ukuba kuyimfuneko ukumisa umatshini, ubushushu obumiselweyo kufuneka buncitshiswe bube yi-100°C kuqala, kwaye emva koko isilinda yeplastiki enyibilikisiweyo kufuneka icocwe nge-ABS eqhelekileyo. Umxube ocociweyo kufuneka ubekwe emanzini abandayo ukuthintela ukubola okungakumbi. Ukuba ufuna ukutshintsha ukusuka kwezinye iiplastiki ukuya kwi-ABS, kufuneka uqale ucoce isilinda yeplastiki enyibilikisiweyo nge-PS, PMMA okanye i-PE. Ezinye iimveliso ze-ABS azinangxaki xa zisanda kukhululwa kwisikhunta, kodwa ziya kutshintsha umbala emva kwexesha elithile, okunokubangelwa kukushisa kakhulu okanye ukuhlala kweplastiki kwisilinda enyibilikisiweyo ixesha elide kakhulu.
8. Emva kokucutshungulwa kweemveliso
Ngokubanzi, iimveliso ze-ABS azidingi ukucutshungulwa emva kokulungiswa, kuphela iimveliso zodidi lwe-electroplating ekufuneka zibhakwe (70-80°C, iiyure ezi-2-4) ukuze kuthintelwe iimpawu zomphezulu, kwaye iimveliso ekufuneka zicutshungulwe nge-electroplating azinakusebenzisa i-release agent, kwaye iimveliso kufuneka zipakishwe kwangoko emva kokuba zikhutshiwe.
9. Izinto ezifuna ingqwalasela ekhethekileyo xa kusenziwa uyilo
Kukho iintlobo ezahlukeneyo ze-ABS (ingakumbi uhlobo oluthintela ilangatye), olunyibilikayo lunamathele kakhulu kumphezulu wesikrufu emva kokufakelwa iplastiki, kwaye luya kubola emva kwexesha elide. Xa imeko engentla isenzeka, kuyimfuneko ukutsala icandelo le-screw homogenization kunye ne-compressor yokusula, kwaye ucoce isikrufu rhoqo nge-PS, njl.
Ixesha lokuthumela: Agasti-09-2023
