Kuponya mchenga: Kuponya mchenga komwe kumagwiritsidwa ntchito kwambiri mumakampani opanga ma valve kungagawidwenso m'mitundu yosiyanasiyana ya mchenga mongamchenga wonyowa, mchenga wouma, mchenga wagalasi la madzi ndi mchenga wosaphika wa furanmalinga ndi zomangira zosiyanasiyana.
(1) Mchenga wobiriwira ndi njira yopangira umba momwe bentonite imagwiritsidwa ntchito ngati chomangira ntchito. Makhalidwe ake ndi awa: nkhungu ya mchenga yomalizidwa siifunika kuumitsidwa kapena kuchitidwa chithandizo chapadera cholimba, nkhungu ya mchenga imakhala ndi mphamvu yonyowa, ndipo pakati pa mchenga ndi chipolopolo zimakhala ndi zocheperako zabwino, zomwe zimakhala zosavuta kuyeretsa ndi kugwetsa mchenga. Kuchita bwino kwa kupanga umba ndi kwakukulu, nthawi yopangira ndi yochepa, ndipo mtengo wazinthu ndi wotsika, zomwe zimakhala zosavuta kukonza kupanga mzere wa msonkhano. Zoyipa zake ndi izi: zoyika umba zimakhala ndi zolakwika monga ma pores, ma inclusions a mchenga, ndi mchenga womata, ndipo mtundu wa zoyika umba, makamaka mtundu wamkati, ndi wochepa kwambiri.
(2) Mchenga wouma ndi njira yopangira chitsanzo pogwiritsa ntchito dongo ngati chomangira, ndipo bentonite yaying'ono imatha kulimbitsa mphamvu yake yonyowa. Makhalidwe ake ndi awa: nkhungu ya mchenga imafunika kuumitsidwa, imakhala ndi mpweya wabwino wolowa komanso mpweya wofalikira, sikophweka kupanga zolakwika monga kutsuka mchenga, kumamatira mchenga, ndi ma pores, ndipo ubwino wa mkati mwa chopoperacho ndi wabwino. Zoyipa zake ndi izi: zida zowumitsira mchenga zimafunika, ndipo nthawi yopangira ndi yayitali.
(3) Mchenga wa sodium silicate ndi njira yopangira zinthu pogwiritsa ntchito galasi la madzi ngati chomangira. Makhalidwe ake ndi awa: galasi la madzi limatha kuuma lokha mutakumana ndi CO2, ndipo limatha kukhala ndi zabwino zosiyanasiyana zomangira mpweya wolimba komanso kupanga maziko. Komabe, pali zovuta monga kusagundika bwino kwa chipolopolo, kuvutika kuyeretsa mchenga kuti ugwiritsidwe ntchito popanga zinthu, komanso kuchepa kwa mchenga wogwiritsidwa ntchito.
(4) Kuumba mchenga wa Furan resin osaphika ndi njira yopangira zinthu pogwiritsa ntchito furan resin ngati chomangira. Pa kutentha kwa chipinda, mchenga woumba umachiritsidwa chifukwa cha momwe chomangira chimagwirira ntchito pogwiritsa ntchito chomangira. Makhalidwe ake ndi awa: nkhungu ya mchenga siifunika kuumitsidwa, zomwe zimafupikitsa kwambiri nthawi yopangira ndikusunga mphamvu. Mchenga woumba wa resin ndi wosavuta kuumanga ndipo umatha kugwedezeka bwino, ndipo mchenga woumba wa zinthu zomangira ukhozanso kutsukidwa mosavuta, kulondola kwa zinthu zomangira ndi kwakukulu, ndipo kutha kwa pamwamba ndi kwabwino, zomwe zingathandize kwambiri kuti zinthu zomangira zikhale bwino. Zoyipa zake ndi izi: zofunikira pa mchenga wosaphika ndizokwera, malo opangira zinthu ali ndi fungo loyipa pang'ono, ndipo mtengo wa resin nawonso ndi wokwera. Kusakaniza mchenga wouma wa furan resin: Mchenga wouma wouma umagwiritsidwa ntchito popanga zinthu zomangira mosalekeza, kuwonjezera mchenga wosaphika, resin, chomangira chomangira, ndi zina zotero, ndikuzisakaniza mwachangu. Sakanizani ndikugwiritsa ntchito nthawi iliyonse. Dongosolo lowonjezera zinthu zosiyanasiyana zopangira posakaniza mchenga wa resin ndi motere: mchenga woyambirira + wothandizira kuchiritsa (p-toluenesulfonic acid aqueous solution) – (120-180S) – resin + silane – (60-90S) – mchenga (5) Mtundu wamba wa mchenga Njira yopangira kuponyera: kuponyera molondola.
Nthawi yotumizira: Ogasiti-17-2022
