Umgangatho wombhobho ongenanto yinto ephambili ekunqumeni umgangatho weumbhobho ongenamthungo.Ukuze kuqinisekiswe inkqubela phambili efanelekileyo yenkqubo yokubhoboza kunye nokufumana imibhobho esemgangathweni ophezulu, iimfuno ezingqongqo kufuneka zibekwe kwijometri, isakhiwo samandla aphantsi kunye nomgangatho wombhobho ongenanto.

Ukuba i-diameter ye-tube engenanto inkulu kakhulu okanye i-ellipse inkulu kakhulu, iimeko zokuluma ngexesha lokubhoboza ziya kuba zibi, kwaye ukugoqa kwangaphakathi kuya kubangelwa ngenxa yokunyanzeliswa okugqithisileyo kwe-tube engenanto.

Umbutho wangaphakathi ubhekisela kwi-shrinkage kunye ne-porosity ephakathi, ukuqokelelwa kwe-non-metallic inclusions, kunye nomxholo wegesi.Ubunzima bale mfuno buhluka ngokusetyenziswa kwemibhobho engenamthungo kunye nohlobo lwentsimbi.

Eyona nto ibalulekileyo ngumgangatho womphezulu wetyhubhu engenanto, kuba i-tube engenanto ithathwa kwityhubhu engenamthungo yemveliso kuyo nayiphi na idolophu ekhubazekileyo, kwaye indawo apho abantu abakhubazekileyo bahlala bebangelwa kukuxinana koxinzelelo, ukuguqulwa kweplastiki kuya kwenza ukukhubazeka ngokunzulu nangaphezulu.

Ukushwankathela, ukwenzela ukuvelisa iimveliso zombhobho ezingenamthungo ezikumgangatho ophezulu, lelona nyathelo libalulekileyo lokuqinisekisa umgangatho wombhobho ongenanto.