Cov txheej txheem tshwj xeeb ntawm qhov tsis tshua muaj siab casting muaj xws li cov kua nqa, ntim, pressurization, tuav crystallization, siab nyem, txias qeeb, thiab lwm yam.
1. Lifting quab yuam thiab tus nqi
Lifting siab yog hais txog lub siab xav tau thaum cov hlau qib nce mus rau lub rooj vag. Qhov nce ceev ntawm cov kua hlau hauv cov riser yog qhov nce ceev. Qhov nce nrawm yuav tsum ruaj khov, uas yog qhov tsim nyog rau kev tso pa tawm hauv cov pwm pwm. Nyob rau tib lub sijhawm, cov kua hlau yuav tsis tawg thaum nws nkag mus rau hauv lub qhov rooj.
2. Filling siab thiab filling ceev
Pwm filling siab yog hais txog lub siab uas yuav tsum tau ua kom cov kua hlau ntim rau saum lub pwm. Nyob rau hauv lub filling theem, lub siab nce ceev ntawm cov kua hlau nto yog lub filling ceev.