Sand casting is used to produce a wide variety of metal components with complex geometries. These parts can vary greatly in size and weight, ranging from a couple ounces to several tons. Some smaller sand cast parts include components as gears, pulleys, crankshafts, connecting rods, and propellers. Larger applications include housings for large equipment and heavy machine bases. Sand casting is also common in producing automobile components, such as engine blocks, engine manifolds, cylinder heads, and transmission cases. Sand Casting,Aluminum Sand Casting,Stainless Steel Sand Casting,Sand Precision Casting Ningbo City Yinzhou Ruican Machinery Co.,Ltd , https://www.ruicanmanufacturer.com
Today, as innovation becomes more and more important, past methods of competing for customers by price are no longer effective. With the growth and accumulation of the drying equipment industry and the continuous maturation of the market, the competition among enterprises has become more intense. The technology of food drying equipment Technology content dominates the competition.
Experts from China Food Machinery and Equipment Network believe that the requirements for drying equipment in the food field are relatively high, and there are specific requirements for the materials, structure and processing quality of the drying equipment used, and there are also stringent health index requirements for drying equipment and drying systems. Therefore, it is necessary to continuously pass technological innovations to meet the ever-increasing demands in the application field. This is also the path that China's food drying equipment industry must take to break through its development.
However, at this stage, the capacity of China's food drying equipment manufacturers is generally low, and there are few companies that can introduce new technologies and new products with independent intellectual property rights, resulting in slow development of drying technology. One of the reasons is that knowledge achievements have not been effectively translated into actual productivity. At present, R&D and innovation in the field of drying equipment mainly rely on universities and research institutes. Due to the disconnection of companies, it is difficult to effectively turn knowledge achievements into productivity.
The food industry has provided a large market space for drying equipment. However, at present, the development of drying equipment in China is relatively slow. The fundamental reason is that the level of technological innovation is not enough. Technological innovation in enterprises is the fundamental driving force for structural adjustment. Without the technological innovation of the enterprise and without the product innovation of the enterprise, there will be no adjustment of the product structure, there will be no adjustment of the economic structure of the meso-level and macro-level. If we really want to promote the adjustment of the economic structure, we must make great efforts to further promote The technological innovation of enterprises provides good guarantees for enterprises to better engage in technological innovation.
Sand casting, the most widely used casting process, utilizes expendable sand molds to form complex metal parts that can be made of nearly any alloy. Because the sand mold must be destroyed in order to remove the part, called the casting, sand casting typically has a low production rate. The sand casting process involves the use of a furnace, metal, pattern, and sand mold. The metal is melted in the furnace and then ladled and poured into the cavity of the sand mold, which is formed by the pattern. The sand mold separates along a parting line and the solidified casting can be removed. The steps in this process are described in greater detail in the next section. In sand casting, the primary piece of equipment is the mold, which contains several components. The mold is divided into two halves - the cope (upper half) and the drag (bottom half), which meet along a parting line. Both mold halves are contained inside a box, called a flask, which itself is divided along this parting line. The mold cavity is formed by packing sand around the pattern in each half of the flask. The sand can be packed by hand, but machines that use pressure or impact ensure even packing of the sand and require far less time, thus increasing the production rate. After the sand has been packed and the pattern is removed, a cavity will remain that forms the external shape of the casting. Some internal surfaces of the casting may be formed by cores.
Sand casting is able to use of almost any alloy. An advantage of sand casting is the ability to cast materials with high melting temperatures, including steel, nickel, and titanium. The four most common materials that are used in sand casting are shown below, along with their melting temperatures
Materials Melting temperature
Aluminum alloys 1220 °F (660 °C)
Brass alloys 1980 °F (1082 °C)
Cast iron 1990-2300 °F (1088-1260 °C)
Cast steel 2500 °F (1371 °C)
The material cost for sand casting includes the cost of the metal, melting the metal, the mold sand, and the core sand. The cost of the metal is determined by the weight of the part, calculated from part volume and material density, as well the unit price of the material. The melting cost will also be greater for a larger part weight and is influenced by the material, as some materials are more costly to melt. However, the melting cost in typically insignificant compared to the metal cost. The amount of mold sand that is used, and hence the cost, is also proportional to the weight of the part. Lastly, the cost of the core sand is determined by the quantity and size of the cores used to cast the part.
Sand casting process advantages
Can produce very large parts
Can form complex shapes
Many material options
Low tooling and equipment cost
Scrap can be recycled
Short lead time possible
Applications:
Construction Machine Parts,Scaffolding Parts,Engine blocks and manifolds, machine bases, gears, pulleys, agriculture parts,Marine Parts,medical parts,hardware, automobile parts,ect.
Technical content of food drying equipment dominates the competition
In recent years, although China's food drying equipment industry has achieved certain development results, there are still many problems. For example, if the company is not large, strong, specialized, and lean, and lacks awareness and capability for technological innovation, the overall growth rate of the drying equipment industry has slowed in the past two years, and a certain scale economy has not been formed.