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.
Iyanrin ibi-igi seramiki ti a fi silẹ jẹ pataki ti awọn ohun alumọni ti o ni Al2O3 ati SiO2 ati ṣafikun pẹlu awọn ohun elo nkan ti o wa ni erupe ile miiran. Iyanrin Foundry ti iyipo ti a ṣe nipasẹ lulú, pelletizing, sintering ati awọn ilana igbelewọn. Eto kristali akọkọ rẹ jẹ Mullite ati Corundum, pẹlu apẹrẹ ọkà ti yika, refractoriness giga, iduroṣinṣin thermochemical ti o dara, imugboroja igbona kekere, ipa ati abrasion resistance, awọn ẹya ti pipin ti o lagbara. Nigbati iyanrin seramiki ti a lo ninu ilana iyanrin alawọ ewe, o le mu iyanrin aise ti a tun lo awọn akoko, dinku itujade iyanrin egbin, imudara ikore simẹnti.
● Super ga otutu resistance ati ki o tayọ breathability ṣe kan ga darí reclamation oṣuwọn ti iyanrin, kekere egbin iyanrin itujade.
● Ga permeability. Iyatọ ti iyanrin alawọ ewe ti a dapọ nipasẹ iyanrin simẹnti seramiki sintered ga ju eyiti a dapọ nipasẹ iyanrin quartz labẹ awọn ipo ilana kanna.
Pipin iwọn patiku le jẹ adani gẹgẹbi ibeere rẹ.
Apapo |
20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 | Pan | AFS | |
μm |
850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pan | ||
koodu | 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 |
Awọn ẹka ọja