{"id":2105,"date":"2023-07-17T18:06:54","date_gmt":"2023-07-17T16:06:54","guid":{"rendered":"https:\/\/mnwell.com\/?p=2105"},"modified":"2023-07-17T18:08:22","modified_gmt":"2023-07-17T16:08:22","slug":"whats-the-difference-between-sand-casting-and-die-casting","status":"publish","type":"post","link":"https:\/\/mnwell.com\/it\/whats-the-difference-between-sand-casting-and-die-casting\/","title":{"rendered":"Qual \u00e8 la differenza tra la colata in sabbia e la pressofusione?"},"content":{"rendered":"
Sand casting and die casting are two common casting methods that each have advantages and disadvantages and are suitable for different products and applications. The characteristics and differences of these two casting methods are described in detail below. Let’s first understand the sand casting:<\/p>\n\n\n\n
Sand casting is a traditional casting method in which castings are made by filling a mold with a wet sand gooey mixture. First, the foundry needs to make a mold, knead wet sand into the shape of the model, and reserve casting ports and vent holes for it. The molten metal is then poured into the sprue and allowed to flow into the mold to fill the space. The molten metal cools and solidifies in the sand to form a casting. The advantage of this method is that the manufacturing cost is low, and it can produce large quantities of parts, especially for the production of large parts. However, this method requires high mold making precision and strict control over materials and processes during the manufacturing process. At the same time, the quality of castings produced by sand casting is often rough and prone to porosity or flaws.<\/p>\n\n\n\n <\/p>\n\n\n\n Before sand casting, it is necessary to plan and design the required parts first, and determine their shape and size.<\/p>\n\n\n\n The mandrel is the product of the internal shape of the part, usually made of wax, mud, wood, gypsum and other materials. A mold is a finished product of the external shape of a part, usually made using a sand mold. When making sand molds, put sand on the model, and the shape of the part in the mold can be presented. By fitting the two parts of the mold together, the molten iron is poured into the center. When the molten iron is solidified, the mold is disassembled, and the parts required for production are cleaned out, and these parts are revealed in their embryonic form.<\/p>\n\n\n\n Molten iron needs to go through ironmaking, and put the required metal materials into the furnace to melt. The temperature of the molten metal is as high as several thousand degrees, and then poured into the sand mold. Loose, convenient for later machining.<\/p>\n\n\n\n The molten iron is poured into the sand mold at a high temperature, and the hot air sprayed from the sand mold lubricates the solidification surface of the casting, making the surface of the casting harden quickly, and the inside of the casting undergoes a period of chaos and differentiation, and finally solidifies and forms.<\/p>\n\n\n\n After the castings are taken out, they need to be cleaned and processed. Cleaning includes grinding, ductile iron, shoveling, etc., while machining is usually the machining that needs to be done in order to bring the accuracy of the part to the desired standard.<\/p>\n\n\n\n The manufacturing cost is low, large parts can be manufactured, the production cycle is short, the surface roughness of castings is small, etc. However, the product density of sand casting is high, the mechanical properties are relatively weak, and it is difficult to achieve high precision casting.<\/p>\n\n\n\n Sand casting is a relatively common process for making metal parts, whether it is in heavy industry or in the manufacture of small parts. Metal parts of various shapes can be manufactured by sand casting, the advantage of which is that the production cycle is short and some relatively simple parts can be mass-produced. Therefore, the technology of sand casting is being widely used and paid attention to day by day.<\/p>\n\n\n\n In contrast, die casting is a process in which liquid metal is injected into an already formed mold under high pressure. Its main features are: fast manufacturing speed, high surface smoothness and high density of die castings, and good economic benefits can be achieved in large-scale production occasions. Let’s understand die casting again:<\/p>\n\n\n\n <\/p>\n\n\n\n<\/figure>\n\n\n\n
Sand casting steps<\/h4>\n\n\n\n
Step 1: Determine Part Shape and Size<\/h5>\n\n\n\n
Step 2: Making the core mold and mold<\/h5>\n\n\n\n
Step 3: Preparing the Iron<\/h5>\n\n\n\n
Step Four: Pouring<\/h5>\n\n\n\n
Step 5: Clean Up and Process<\/h5>\n\n\n\n
The advantages of sand casting<\/h4>\n\n\n\n
Die-casting<\/h3>\n\n\n\n