Munguva yekugadzirwa, apo plastiki inonyunguduka inopinzwa mugomba rekuumbwa pasi pekupisa kwepamusoro uye kudzvanywa kwepamusoro uye kuumbwa pasi pekumanikidzwa, kana tembiricha yadonha, kunyunguduka kunotonhora uye kusimba kuita chikamu chepurasitiki.Ukuru hwechikamu chepurasitiki idiki pane chemugodhi we mold, iyo inonzi shorten.Zvikonzero zvikuru zvekupfupisa ndezvizvi zvinotevera.Paunenge uchigadzira mapurasitiki, zviyero zvepamuchinjikwa zvemagedhi akasiyana-siyana akasiyana.Gedhi hombe rinobatsira kuwedzera kumanikidza kwegomba, kurebesa nguva yekuvhara kwegedhi, uye kufambisa kunyungudika kuyerera mukati megomba, saka kuwanda kwechikamu chepurasitiki zvakare kwakakura, nekudaro kudzikisa kupfupika, zvikasadaro kuchawedzera kupfupika. rate.
Shanduko muchimiro chemakemikari epurasitiki mold panguva yekugadzira.Mamwe mapurasitiki anoshandura chimiro chavo chemakemikari panguva yekuumba.Semuyenzaniso, mumapurasitiki anopisa, resin molecule inoshanduka kubva pamutsara dhizaini kuenda kuchimiro-chakaita semuviri.Iyo volumetric mass yemuviri-yakafanana chimiro yakakura kupfuura iyo yemutsara chimiro, saka huwandu hwayo hwese hunopfupiswa, zvichikonzera kupfupisa.Zvikamu zvepurasitiki zvakatetepa zvine yunifomu yemadziro ukobvu inotonhorera nekukurumidza mumhango yeforoma, uye chiyero chekupfupisa chinowanzova chidiki kwazvo mushure mekudhonzwa.Iyo yakareba nguva yekuti chikamu chepurasitiki chakakora chakakora mudhuri kuti chitonhore mugomba, ndiko kukura kwekupfupisa mushure mekudhirowa.Kana ukobvu hwechikamu chepurasitiki chakasiyana, pachava neimwe dhigirii yekupfupisa mushure mekudhirowa.Muchiitiko chekuchinja kwakadaro kamwe kamwe mumadziro emadziro, chiyero chekupfupisa chichachinjawo kamwe kamwe, zvichikonzera kushushikana kukuru kwemukati.
Residual stress inoshanduka.Kana zvikamu zvepurasitiki zvichiumbwa, nekuda kwesimba rekuumbwa kwekumanikidza uye simba rekugera, anisotropy, kusaenzana kusanganiswa kwezvinowedzera uye kupisa kwemuumbi, pane zvakasara zvinonetsa muzvikamu zvepurasitiki zvakaumbwa, uye kushushikana kwasara kuchaita zvishoma nezvishoma uye kupararira zvakare, zvichikonzera zvikamu zvepurasitiki Kupfupisa kunowanzonzi post-shortening.
Nguva yekutumira: Jul-05-2021