Nheyo yekuumbwa kwejekiseni yecemented carbide mold Pane mhango yekudyisa muforoma, iyo yakabatana neyakavharika jekiseni mold cavity kuburikidza ne-in-mold gating system. Paunenge uchishanda, unofanirwa kutanga wawedzera iyo yakasimba yekuumba zvinhu mugomba rekudyisa uye nekuipisa kuti ichinje kuita viscous flow state. Zvadaro shandisa yakakosha plunger kumanikidzira epurasitiki kunyunguduka mugomba rekudyisa mumuchina, kuitira kuti kunyunguduka kupfuure nepakati. Iyo yekudurura system inopinda yakavharwa mold cavity uye inoita kuyerera kuzadza. Kana iyo yakanyunguduka ichizadza mhango ye mold, uye mushure mekubata kwakakodzera kubata uye kusimba, mold inogona kuvhurwa kubvisa chigadzirwa. Parizvino, kuumba jekiseni kunonyanya kushandiswa kune thermoset epurasitiki zvigadzirwa.
Kuenzaniswa ne compression molding, cemented carbide mold jekiseni molding ine plasticized plastic isati yapinda mugomba, saka kuumbwa kupfupi, kuita basa rekugadzira kwakakwira, zvikamu zvepurasitiki zvine huremu hwepamusoro, kunaka kwepamusoro, uye hakuna flash. Mutete zvikuru; inogona kuumba zvikamu zvepurasitiki zvine madiki maduku, maburi emativi akadzika uye zvikamu zvepurasitiki zvakaoma; inodya zvakawanda zvekushandisa; iyo shrinkage rate yekuumbwa kwejekiseni yakakura kudarika shrinkage rate ye compression molding, iyo inozokanganisa kurongeka kwezvikamu zvepurasitiki, asi kune hupfu Zvikamu zvePlastiki zvakazadzwa nemafirita echimiro hazvina mhedzisiro; chimiro cheiyo simende carbide jekiseni mold yakanyanya kuomarara kupfuura yekumisikidza mold, iyo yekuumba inomanikidza yakakwira, uye basa rekuumba rinonyanya kuoma. Jekiseni molding inoshandiswa chete kana compression molding isingakwanise kuita zvinodiwa zvekugadzira. Jekiseni molding inokodzera kuumbwa kwe thermosetting zvikamu zvepurasitiki zvine maumbirwo akaoma uye akawanda anoisa.
The main process parameters of cemented carbide mold jekiseni kuumba zvinosanganisira kuumba kumanikidza, kuumba tembiricha uye molding cycle, etc. Izvo zvose zvine chokuita nezvinhu zvakadai semhando yepurasitiki, chimiro chekuumbwa, uye mamiriro echigadzirwa.
(1) Molding pressure inoreva kudzvinyirirwa kunoitwa nemuchina wekunyungudika mukamuri yekudyisa kuburikidza nekoramu yekumanikidza kana plunger. Sezvo paine kurasikirwa kwekumanikidzwa kana kunyungudika kuchipfuura nepakati pegeti system, kuumbwa kwekumanikidza panguva yekumanikidza jekiseni kunowanzo 2 kusvika ku3 nguva iyo panguva yekumanikidza kuumbwa. Iko kuumbwa kwekumanikidzwa kwephenolic plastiki poda uye amino plastiki poda inowanzoita 50 ~ 80MPa, uye kudzvinyirira kwepamusoro kunogona kusvika 100 ~ 200MPa; iwo mapurasitiki ane fiber filler ari 80 ~ 160MPa; iyo yakaderera-kumanikidza kurongedza mapurasitiki senge epoxy resin uye silicone ndeye 2 ~ 10MPa.
(2) Kugadzira tembiricha ye simende carbide mold inosanganisira tembiricha yechinhu mukamuri yekudyisa uye tembiricha ye mold pachayo. Kuti uve nechokwadi chekuti zvinhu zvacho zvine fluidity yakanaka, tembiricha yemidziyo inofanira kunge yakadzikira zvakafanira pane tembiricha yekubatanidza ne10 ~ 20°C. Sezvo ipurasitiki inogona kuwana chikamu chekupisa kwekukwenya kana ichipfuura nepakati pekudurura, tembiricha yekamuri yekudyisa uye mold inogona kuderera. Iyo tembiricha yekuumbwa kwejekiseni inowanzodzika 15 ~ 30 ℃ pane iyo yekumanikidza kuumbwa, kazhinji 130 ~ 190 ℃.
(3) Iyo jekiseni yekuumba kutenderera kwecemented carbide molds inosanganisira yekudyisa nguva, mold kuzadza nguva, kuyambuka-kubatanidza uye kurapa nguva, yekudhirowa nguva yekutora zvikamu zvepurasitiki, uye mold yekubvisa nguva. Nguva yekuzadza yekuumbwa kwejekiseni inowanzoita masekonzi mashanu kusvika makumi mashanu, nepo nguva yekurapa inoenderana nerudzi rwepurasitiki, saizi, chimiro, ukobvu hwemadziro, preheating mamiriro uye mold chimiro chechikamu chepurasitiki, uye kazhinji 30 kusvika 180 masekondi. Jekiseni kuumbwa kunoda kuti plastiki ive nemvura yakawanda isati yasvika pakuoma kwekushisa, uye mushure mokunge yasvika pakuoma kwekushisa, inofanira kunge iine kukurumidza kuomesa. Zvinhu zvinowanzo shandiswa pakuumba jekiseni zvinosanganisira: phenolic mapurasitiki, melamine, epoxy resin uye mamwe mapurasitiki.
Nguva yekutumira: Sep-18-2024
