Learn about the craftsmanship of stone mountain carving

stone mountain carving is a relatively common type of stone carving today. Many people have seen stone mountain carving, but do not know much about its production process. The production process of stone mountain carving is relatively complicated.Below.

1. stone mountain carving and shell making process

Before making a stone mountain sculpture, you first need to make a silicone rubber mold, brush wax on the mold until it reaches the thickness required by the standard, take out the wax mold, and trim the wax mold to achieve the accuracy required by the process. Next, clean the wax model, add 0.01% mass fraction of JFC in clean water as a cleaning fluid, clean the wax model and prepare to hang the shell.

Preparation of water glass paint: the powder-liquid mass ratio of mullite powder and water glass in the top layer paint is 1:1.3, and the mullite powder (mass fraction) is mixed evenly according to 270 mesh 40% and 320 mesh 60%; the water in the back layer paint The glass density is 1.32g/cm3, the mullite powder is 200 mesh, the mullite sand is 10-20 mesh, and the powder-to-liquid mass ratio is 1:1.4.

Use a brush to evenly apply the surface coating on the back of the wax model, and then sprinkle 40 to 70 mesh mullite sand as required; use a watering can to evenly spray ammonium chloride hardening liquid (mass fraction 20% to 25% chlorine Ammonium chloride aqueous solution, pH value 6 ~ 7), rinse with clean water after 20 minutes. Follow this process in sequence. After coating and hanging for 5 times, reinforce it with steel bars; it will be completed after coating and hanging for 15 times.

Then the front side of the wax mold is painted and hung according to the shell-making process on the back.

2. stone mountain carving and Casting Technology

After the finished shell is steam dewaxed, carefully check whether there are any cracks in the stone mountain carving shell, and repair them if necessary. The baking temperature of the molded shell is about 820, and then kept warm for 4 hours. The

copper alloy smelting temperature reaches about 1250°C and the pouring temperature is controlled at about 1150°C. The pouring must be even and rapid, and the flow must not be interrupted; there must be a dedicated person to block the slag during pouring.

Immediately after the pouring is completed, use tap water to quickly cool the surface shell, and clean the sand after the casting is completely cooled. During sand cleaning, it is necessary to prevent the casting from being deformed by being knocked or damaging the surface texture of the casting. The sand inside and outside the casting must be cleaned before entering the next finishing process and applying gold to the surface of the welded casting.

The production process of stone mountain carving is complicated, so the price will be relatively high. However, because of its beautiful appearance, long service life and simple later maintenance, it is still favored by many people. When making stone mountain carving, you need to fully consider your own needs and funds. Budget and choose reasonable stone sculpture.