Zeziphi izilumkiso zokusetyenzwa kwemathiriyeli ekrwada yePC kwiimveliso ezigqityiweyo?
Zeziphi iimveliso ezihlangabezana neemfuno zabathengi kwaye ziqaqambise ukukhuphisana kwethu kwemveliso? Senze uphando kwiiplatifti ze-intanethi kwaye safumanisa ukuba iimveliso ezicutshungulwayo ze-PC zithandwa kakhulu, njenge-visor yelanga, iibhodi ze-basketball, izibane zezibane, amakhaka, njalo njalo.
Ukuveliswa kwemveliso ikakhulu kuxhomekeke kubumba. Ngethuba nje isikhunta senziwe, isitayela esifunwayo semveliso sanele. Kodwa eyona ntloko iphambili kwinkqubo yokuvelisa kukuba ukusetyenzwa kufuna ingqalelo kwiinkcukacha ezininzi, ngaphandle koko iimveliso eziveliswayo ziya kuba zikhubazeke okanye zingahlangabezani nemigangatho esiyifunayo. Ngoko ke, ziziphi iinkcukacha esizifunayo ukuba sinikele ingqalelo kwinkqubo yokuvelisa? Sishwankathele iingqwalasela ezilishumi eziphambili.
Inqaku lokuqala: Izixhobo zokomisa ekrwada
Iiplastiki zePC, nokuba zivezwe kumanqanaba aphantsi kakhulu okufuma, zinokungena kwi-hydrolysis ukuze ziqhawule iibhondi, zinciphise ubunzima bemolekyuli, kwaye zinciphise amandla omzimba. Ngoko ke, phambi kwenkqubo yokubumba, umxholo wokufuma we-polycarbonate kufuneka ulawulwe ngokungqongqo ukuba ube ngaphantsi kwe-0.02%.
Inqaku lesibini: Iqondo lokushisa lokutofa
Ngokubanzi, iqondo lobushushu phakathi 270 ~320 ℃ ikhethelwe ukubumba. Ukuba ubushushu bezinto eziphathekayo budlula 340 ℃ , I-PC iya kubola, umbala wemveliso uya kuba mnyama, kwaye iziphene ezifana neengcingo zesilivere, imivimbo emnyama, amabala amnyama, kunye namaqamza aya kuvela kumphezulu. Kwangaxeshanye, iipropathi zomzimba kunye noomatshini nazo ziya kuncipha kakhulu.
Inqaku lesithathu: Uxinzelelo lokutofa
Iimpawu zomzimba kunye noomatshini, uxinzelelo lwangaphakathi, kunye nokuncipha kokubumba kweemveliso zePC kunempembelelo ethile kwimbonakalo yazo kunye neepropathi zokudiliza. Uxinzelelo oluphantsi kakhulu okanye oluphezulu kakhulu lwenaliti lunokubangela iziphene ezithile kwiimveliso. Ngokubanzi, uxinzelelo lwenaliti lulawulwa phakathi kwe-80-120MPa.
Inqaku lesine: Ukubamba uxinzelelo kunye nexesha lokubamba
Ubungakanani boxinzelelo lokubamba kunye nobude bexesha lokubamba kunempembelelo enkulu kuxinzelelo lwangaphakathi lweemveliso zePC. Ukuba uxinzelelo luphantsi kakhulu kwaye umphumo wokuncipha uncinci, amaqamza e-vacuum okanye ukujongwa komphezulu kunokwenzeka. Ukuba uxinzelelo luphezulu kakhulu, uxinzelelo olubalulekileyo lwangaphakathi lunokuveliswa malunga ne-sprue. Kwinkqubo esebenzayo, ubushushu bezinto eziphezulu kunye noxinzelelo oluphantsi lokubamba luhlala lusetyenziselwa ukusombulula le ngxaki.
Inqaku lesihlanu: Isantya sokutofa
Akukho mpembelelo ibalulekileyo ekusebenzeni kweemveliso zePC, ngaphandle kodonga olubhityileyo, isango elincinci, umngxuma onzulu, kunye neemveliso zenkqubo ende. Ngokubanzi, ukusetyenzwa kwesantya esiphakathi okanye esicothayo kusetyenziswa, kwaye naliti enamanqanaba amaninzi iyakhethwa, ngokuqhelekileyo kusetyenziswa indlela ecothayo ecothayo ecothayo enamanqanaba amaninzi.
Inqaku lesithandathu: Ubushushu bomngundo
85~120 ℃ , ilawulwa ngokubanzi kuma-80-100 ℃ . Kwiimveliso ezinemilo enzima, ubukhulu obuncinci, kunye neemfuno eziphezulu, zinokunyuswa ukuya kwi-100-120 ℃ , kodwa ayikwazi ukudlula iqondo lokushisa elitshisayo lokubumba.
Inqaku lesixhenxe: Isantya se-Screw kunye noxinzelelo lwangasemva
Ngenxa ye-viscosity ephezulu ye-PC enyibilikayo, kunenzuzo kwi-plasticization, ukukhupha, kunye nokugcinwa komatshini weplastiki ukunqanda umthwalo omningi wesijiva. Imfuno yesantya se-screw akufanele ibe phezulu kakhulu, ilawulwa ngokubanzi kwi-30-60r / min, kunye noxinzelelo lwangasemva kufuneka ilawulwe phakathi kwe-10-15% yoxinzelelo lwe-injection.
Inqaku lesibhozo: Ukusetyenziswa kwezongezo
Ngexesha lenkqubo yokubumba i-PC, ukusetyenziswa kwee-agent zokukhulula kufuneka kulawulwe ngokungqongqo, kwaye ukusetyenziswa kwezinto ezihlaziyiweyo akufanele kudlule amaxesha amathathu, kunye nesantya sokusetyenziswa malunga ne-20%.
Inqaku lethoba: Ukubumba inaliti yePC kuneemfuno eziphezulu zokungunda:
Yila amajelo angqingqwa kwaye amafutshane kangangoko kunokwenzeka, anokugoba okuncinci, kwaye asebenzise amajelo ajikelezayo anqamlezileyo anqamlezayo kunye nokusila kwejelo kunye nokupholisha ukunciphisa ukuchasana kokuhamba kwezinto ezityhidiweyo. Isango lokutofa lingasebenzisa naluphi na uhlobo lwesango, kodwa ububanzi bomgangatho wamanzi ongenayo akufanele kube ngaphantsi kwe-1.5mm.
Inqaku leshumi: Iimfuno zoomatshini beplastiki abasetyenziselwa ukuveliswa kweemveliso zePC:
Umthamo omkhulu wenaliti yemveliso akufanele udlule i-70-80% yomthamo we-injection yegama; Uxinzelelo lwe-clamping luvela kwi-0.47 ukuya kwi-0.78 yeetoni nge-square centimeter yendawo eqikelelweyo yemveliso egqityiweyo; Ubungakanani obufanelekileyo bomatshini malunga ne-40 ukuya kwi-60% yomthamo womatshini wokubumba inaliti ngokusekelwe kubunzima bemveliso egqityiweyo. Ubude obuncinane beskrufu kufuneka bube yi-15 diameter ubude, kunye ne-L/D ratio ye-20:1 ibe yeyona nto ifanelekileyo.
Ukucutshungulwa okunengqiqo kunye nokusebenzayo kuyimfuneko yokwandisa ukusebenza kwemveliso egqityiweyo. Nika abathengi ukhetho oluninzi.