Processing standards generally followed by silica sol casting manufacturers

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  • By:Esperanto Trade

1. Casting methods such as low-voltage casting, aluminum die-casting, and centrifugal casting are suitable for mass production due to the relatively expensive equipment and die-casting molds. For small and medium-sized castings, you can choose the horizontal or vertical clinical boxless high-pressure casting molding machine production line, the solid shape design and production are high in efficiency, and the high-quality silica sol investment castings occupy a small area; for Middle parts can use various boxed high-pressure casting molding machine production lines and air blast molding lines to meet the requirements of rapid and high-precision molding production lines. Core-making methods can be used: cold box, hot box, shell High-efficiency core-making methods such as cores. Medium-volume large-scale castings can consider the use of an epoxy resin self-setting sand surface and core.

2. Prioritize the use of high-precision sand casting. According to the survey, in the world, 60–70% of all castings are produced with sand molds, and about 70% of them are produced with clay sand molds. The key factors are the low cost of sand casting compared with other casting methods, the simple production and processing technology of zinc alloy die castings, and the short production cycle time. Therefore, castings such as cylinder liners, cylinder heads, and engine crankshafts of vehicles are all produced by clay-wet sand molding processes. When the wet type cannot meet the needs, then consider using clay sand to express dry sand, dry sand, or other sand types. The net weight of clay wet-type sand casting can range from a few kilograms to tens of kilograms, while the weight of clay dry-type castings can be about tens of tons. Generally speaking, for medium and large castings, iron castings can be produced with epoxy resin self-hardening sand molds, stainless steel castings can be produced with tap water laminated glass sand molds, and castings with precise specifications and smooth surfaces can be obtained, but the cost is relatively high. high. Naturally, the precision, surface smoothness, relative density, metallographic structure and physical properties of castings produced by sand casting are usually weak, so when the characteristics of castings need to be higher, other casting methods should be used, such as Sand casting (lost wax) casting, aluminum die casting, low voltage casting, carbon steel silica sol investment casting shutteretc.

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