Inkqubo yokuvelisa umbhobho odityanisiweyo rhoqo, echaphazela umgangatho wezinto zinemibhobho engaphezulu kwesinye, izinto eziphambili ekrwada, iteknoloji yokuwelda kunye nokubala komqulu oqala ukulungelelanisa.

Isitshixo sokujonga imilinganiselo yejometri ekrwada. Ijiyometri yohlulo ichaphazela umgangatho wobubanzi bomcu wentsimbi xa ingaphantsi kokutenxa okuvumelekileyo, uxinzelelo lwe-extrusion oludityanisiweyo lombhobho wentsimbi luyancitshiswa, okwenza umbhobho weld welding awunamandla, iintanda okanye ityhubhu evulekileyo. Xa ububanzi bomcu bukhulu kunonyamezelo, amandla oxinzelelo ayanda xa umbhobho wentsimbi odityanisiweyo, iintsimbi zentsimbi zivela emlonyeni, i-lap welding kunye nezinye iziphene ze-welding okanye i-burrs. Ke ngoko, ububanzi bokuguquguquka komcu, abuchaphazeli nje ukuchaneka kobubanzi obungaphandle bombhobho wentsimbi, kodwa buchaphazela kakhulu umgangatho womphezulu wombhobho wentsimbi.
Iimfuno zecandelo elifanayo lomahluko wokutyeba aludluli ixabiso elimiselweyo lombhobho wentsimbi, efuna iqondo eliphezulu lokufana kodonga lombhobho wentsimbi, ukuguquguquka kobunzima bomgca, umthamo ofanayo uya kudluliselwa eludongeni. Ubukhulu bexabiso elivumelekileyo lomahluko ogqityiweyo wobunzima bentsimbi ugqithise umahluko ukuze inani elikhulu lobunzima bentsimbi budlule ukutenxa okuvumelekileyo kwaye kugwetywe inkunkuma. Ukuguquguquka kobunzima bobunzima bensimbi obugqityiweyo buchaphazela kuphela ukuchaneka. Okwangoku, ekubeni ubukhulu be-strip buyahluka, umbhobho wentsimbi ngexesha le-welding, uxinzelelo lwe-extrusion kunye nokungazinzi kobushushu be-welding, okukhokelela kwi-welding engazinzanga ye-welding yentsimbi.

Ukongezelela, ekubeni iziphene zezinto zangaphakathi ze-sandwich yensimbi zikhona, ukungcola, okufana ne-trachoma, yinto enkulu echaphazela umgangatho wensimbi. Ngoko ke, phambi ukuwelda intsimbi, ukujonga umgangatho umphezulu roll strip ngalinye kunye nejometri yomgangatho strip ayihambelani nemigangatho, hayi imveliso, ukuze kuphetshwe ilahleko engeyomfuneko.