Surface stone carving construction technology in stone crafts processing is very important, so how to carry out surface stone carving in stone crafts processing?
1. The construction tools used in stone crafts processing include: air pump, air filter tank, air pipe, spray gun, etc.
2. Construction: The cleanliness of the metal surface used in the processing of stone crafts seriously affects the adhesion of the paint coating. Foreign matter such as water and oil stains remaining or adsorbed on the surface of the workpiece cannot be removed cleanly, often leading to pinholes, nodules, peeling or Poor bonding.
①According to material considerations, stone carving should be painted within 24 hours after phosphating treatment, and steel parts should also be painted and stone carved within 6 hours after sandblasting and shot peening. Practice has proved that this kind of stone crafts processing technology measure is a good way to improve the adhesion between the coating film and the substrate and enhance the corrosion resistance. Insufficient and incomplete separation of oil and water in the compressed air used for spraying causes excessive water and oil in the compressed air, which will inevitably affect the quality of the sprayed paint film and cause various failures and defects. Therefore, stone crafts processing workers can tell everyone that regular cleaning and replacement of filters in oil-water separation facilities and keeping the compressed air clean will help improve the performance of painted
stone sculpture.
②The temperature and humidity at the spraying site have a significant impact on the quality of the sprayed film. At the stone crafts processing and construction site, attention should be paid to keeping the temperature within the range of 10~30℃, and the relative humidity should not exceed 80%. The construction site must be kept clean and orderly. If the temperature is too high and the relative humidity is too high, the paint layer will turn white and take on an orange peel shape. If the temperature is too low, the paint layer will flow easily, which will adversely affect the quality of the coating on the metal surface.
③Air spraying is often used for stone sculpture on metal surfaces. Pay attention to keeping the distance between the spray gun and the spraying surface within the range of 200~300mm, and control the compressed air pressure within the range of 2~4kg/cm㎡ to effectively ensure the quality of the stone sculpture.
④According to the performance, applicable environment and other conditions of the coating used in stone crafts processing, it is necessary to select the type of coating to be lost in order to more effectively exert the anti-corrosion protection effect of the coating. The selection of coating base materials, solvents, and additives must be appropriate, and the proportions must strictly follow the process requirements to ensure sufficient and even mixing to ensure dilution to the specified working viscosity.
⑤The stone carving process in stone crafts processing generally adopts the method of spraying primer, middle paint and topcoat at one time. When spraying nitrocellulose varnish at one time, since the primer and putty are oily, they are easily melted by the thinner, causing bubbles and wrinkles. So the spraying speed should be faster. After re-spraying, wait for it to dry and sand with water-sandpaper before re-spraying.
⑥The surface stone carving requirements of non-standard products shall be implemented according to the product technical conditions.
