Co-Cr Ib Feem-Denture Sprue Tsim thiab Casting-Filling QC txheej txheem

Sprue system geometry tswj molten-alloy filling kom tiav thiab tiv thaiv kev khiav tsis zoo thiab txias kaw ntawm clasps thiab me connectors. Cobalt-chromium alloy nta siab melting point thiab txwv melt fluidity. Cov txheej txheem tshem tawm tau muaj ntau yam nyias-walled Cheebtsam nrog rau cov ilv clasps, slim me connectors thiab mesh qauv. Qhov loj me me ntawm qhov tsis zoo los yog qhov kev teeb tsa ua kom lub cev khov kho thiab ua rau kev khiav tsis zoo, txias kaw thiab shrinkage porosity. Ntau qhov tsis xws luag ntawm metallurgical tsis pom ntawm qhov muag liab qab tseem ua rau lub cev tsis muaj zog, ua rau kev kho mob pob txha ntawm clasps lossis connectors. Sprue npaj ua tiav thaum lub sij hawm siv quav ciab-pattern los ua ke, cais los ntawm cov tom ntej blasting thiab lub moj khaum ua tiav workflows.

Main sprue diameter yog8-10 hlikom txaus molten-hlau xa thiab pub siab los them cov ntim ntim thaum lub sij hawm solidification. Ntws clasps thiab nyias connectors tau txaiscov auxiliary ingateskom channel molten alloy mus rau qhov chaw nyias nyias thiab zam kom tsis txhob muaj qhov ua tiav ntxov. Lub pas dej-pob yog muab tso rau ntawm qhov chaw ua haujlwm thermal los khaws cov khoom seem ntawm qhov kub thiab txias thiab tsis tu ncua pub cov ntawv cog lus casting, txo qis cov kab noj hniav thiab cov porosity.

Sprue Symptoms cov ntsiab lus kom tsis txhob muaj cov lus qhia fragile; sprue yuav tsum tsis txhob txuas ncaj qha rau clasp free-ends. Txiav sprue ntawm clasp terminals tsim micro-cracks uas propagate nyob rau hauv masticatory kev nyuaj siab thiab ua rau kev kho mob puas. Castings yuav tsum txias tag nrho hauv peev nplhaib mus rau chav tsev kub; ceev quenching yog txwv tsis pub. Tom qab casting txias, txiav sprues tawm0.8mm sib tsoo nyiaj, tsis txiav rau hauv lub moj khaum lub cev. Qhov seem sprue stub raug tshem tawm los ntawm kev sib tsoo es tsis txhob txiav.

Kev kuaj zaum kawg: tag nrho daim ntawv pov thawj tsis muaj qhov txias kaw thiab voids. X-ray tshuaj xyuas yog pom zoo rau cov ntu nyias nyias txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau hauv qhov porosity. Optimized sprue layout nce casting tawm los thiab khaws cia cov neeg kho tshuab kev ncaj ncees ntawm Co-Cr tshem tau lub moj khaum, txo qis kev kho mob tsis ua haujlwm ntawm cov pob txha tawg thiab cov khoom sib txuas.