Die casting vs Sand casting
Sand casting and Die casting are both long-standing methods and widely used to serve our life. The following content will help you understand the concept, advantages, disadvantages, and applications of each of these types of methods
Definition
Sand casting
This is a method of using a mold shell made from a type of treated sand, the grains of sand after being treated will be relatively the same size and covered with a glue layer. Always separate from each other, but when heated, the glue covering the outside melts and binds the grains of sand together, so in addition to the name of plastic sand molds, they are also called colloidal sand molds.
Die casting
Die casting is a manufacturing process to produce precisely sized, sharp, smooth or textured surface metal parts. It is done by forcing molten metal under high pressure into a reusable metal mold. This process is often described as the shortest distance between a raw material and the finished product. The term “die casting” is also used to describe a finished part. The term “gravity die casting” refers to castings that are made of a metal mold under one end of gravity. It is known as permanent casting in the US and Canada. What we call “die casting” here is referred to as “die casting pressure” in Europe.
Advantages
Sand casting
The product has uniformity and accuracy, beautiful surface, and rapid mold creation.
Die casting
+ Efficient production of small, complex, and difficult shapes.
+ Extremely high flexibility for the production of a wide variety of molded components.
+ Greater design freedom.
+ Increased flexibility for all types of simple and even very complex parts.
+ High dimensional tolerance.
Virtually close to mesh shapes with precise dimensional control.
Bulky and expensive machining is eliminated and reduced.
+ Productivity and cost-effectiveness are increased.
+ Excellent surface finish.
Parts with outstanding density, inherent strength, uniformity, durability, and physical properties are much better than those of other processes.
+ Fewer production costs.
+ A variety of materials can be produced with the process.
Disadvantages
Sand casting
High cost, sand molds are used only once
Die casting
+ The main disadvantage to die casting is the very high capital cost.
+ Both the required molding equipment and the mold and related components are very expensive, compared to most other casting processes. Hence, to make die casting an economic process, a large production volume is required.
+ Other disadvantages are that the process is limited to highly portable metals and the casting weight should be between 30 grams and 10 kg.
In the standard molding process, the final casting process will have a small amount of porosity. This prevents any heat treatment or welding.
Application
Sand casting
The sand-plastic mixture has the advantage of high durability, especially the remaining strength is very low, so it is often used to make cast intestines with complex shapes with many corners, lugs, grooves … (for example, the gut of engine) after casting, it is easy to clean the inside of the casting.
Die casting
Die casting is used for a wide range of clients, commercial and industrial manufacturing purposes, such as manufacturing of automotive drive systems, engine parts, telecommunications equipment, marine equipment, and spare parts. spare parts for home appliances and hand tools
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