Say panag-ipit ed abeban presyon et sakey a paraan parad metal a likido pian panoen so akaamot a likido manlapud leksab ya anggad tagey diad silong na presyon tan onpabiskeg ed silong na pananesdes tan onpabiskeg ed silong na pananesdes tan say pananesdes so medyo asalambit (a maslak et asalambit la 0{_____MP), a tinawag ya abun-aag ya ata-atiw, a tatawagen ya abu-alsa na saray anlong. Unong ed koneksion na molde tan say pamasiansia ed hurno, nayarin naapag itan ed makina ed tagey na ulo tan makinan panag-ipit ed leksab na abeban presyon.
Say abebbeban boltahe ed tagey na ulo so kaplesan a sankalaknaban ya uusaren a makinan abeba so boltahe a klase na makinan panag-castles{2}} Satan so nibiig ed simplin istruktura, mainomay a panaggawa tan panag-opera; But the production efficiency is low, because only one mold can be placed on maintaining furnace, in one production cycle of castings, all operations are carried out on the furnace, so nearly half of the maintaining furnace in one cycle is idle. Secondly, the lower mold is affected by the heat radiation of the maintaining furnace cover, and the cooling is slow, which prolongs the solidification time of the casting; Niarum ni, say abeban molde so agnayarin iletneg panamegley na aparato na panag-ejortor a kagawaan, a mamapabaleg ed ag-inkayadyari na desinyo na moldeda{4}} pansiansiaen so panagtatak na hurno, panagmintina tan panag-awit na saray alloy so ag-akakombenienti.
Pian natalonaan so ag-inkayadyari na panag-ipit ed gilig na ulo, ginawa so mono na hurnoan, ya angitarya na mognace ed gilig na hurnoan, tan say amag tan amasiansia ed hurnoan na hurnoan dia la {3} et walaan na mas maawaran ya aulin a singa saray bengatla a singa saray bengatla a singa saray bengatlan natitipon ed amin a bengatla a singa saray bengatlan pantitipon a singa amin a bengatla a singa saray bengatlan maawaran a singa saray bengatla a singa saray antiktikey a bengatla a singa saray antiktikey a bengatla a singa saray bengatlan maawaran a singa saray antiktikey. mas kombeniente met so pangekal tan panagtrato ed Jine; Say panagpainit a kipapasen na molde so apaaligwas met la{5} .
