Green Sand Castings are castings made using wet sand or “green sand” molds. The sand is not green in color nor do the molds use “greensand,” a greenish color sandstone. Instead of the sand is called “green” because it has moisture in it (like green wood) before the sand dries out when molten metal is poured in the mold.
What gives the sand moisture and helps the sand stick together when making molds is the clay that is mixed in the sand. Bentonite clay and the sand mixed together provide strong molds that can be created on an automated assembly line.
O le oneone fa'amea fa'amea fa'ameamea e tele lava ina fai mai minerale o lo'o iai Al2O3 ma le SiO2 ma fa'aopoopo i isi mea fa'ameamea. O le oneone fa'ata'amilomilo e faia i le pauta, pelletizing, sintering ma le fa'avasegaina. O lona fausaga tioata autu o Mullite ma Corundum, faatasi ai ma foliga lapotopoto saito, refractoriness maualuga, mautu thermochemical lelei, faalautele vevela maualalo, aafiaga ma abrasion tetee, foliga o le fragmentation malosi. Pe a faʻaaogaina le oneone sima i le oneone lanu meamata, e mafai ona faʻateleina le oneone mataʻutia taimi toe faʻaaogaina, faʻaitiitia le oneone otaota, faʻaleleia le gaosiga o le gaosiga.
● Super maualuga teteʻe vevela ma breathability lelei faia se fua faatatau reclamation faʻainisinia maualuga o oneone, emissions oneone otaota maualalo.
● Mauaina maualuga. O le fa'afefeteina o le oneone lanumeamata fa'afefiloi i le oneone fa'ameamea sintered e maualuga atu nai lo le fa'afefiloi i le oneone quartz i lalo o tulaga tutusa faiga.
E mafai ona fa'avasegaina le fa'asoaina o le lapopoa e tusa ai ma lou mana'oga.
Mesh |
20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 | Pan | AFS | |
μm |
850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pan | ||
code | 40/70 | ≤5 | 20-30 | 40-50 | 15-25 | ≤8 | ≤1 | 43±3 | ||||
70/40 | ≤5 | 15-25 | 40-50 | 20-30 | ≤10 | ≤2 | 46±3 | |||||
50/100 | ≤5 | 25-35 | 35-50 | 15-25 | ≤6 | ≤1 | 50±3 | |||||
100/50 | ≤5 | 15-25 | 35-50 | 25-35 | ≤10 | ≤1 | 55±3 | |||||
70/140 | ≤5 | 25-35 | 35-50 | 8-15 | ≤5 | ≤1 | 65±4 |
Vaega o oloa