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In simple terms, rapid prototyping is a manufacturing technique that can transform design ideas in one's mind into real objects within a very short period of time. Its core feature is "fast", and it is mainly used to quickly verify the appearance, structure, or function of a product before formal mass production.

You can think of it this way: If you want to make a part using the traditional method, you usually need to first create a set of molds. This process can take from a few weeks to several months. However, rapid prototyping is like bringing a "three-dimensional printer" into reality. Usually, within a few hours to a few days, you can get a real part. This is why it is often equated with "3D printing" - although the technology it involves is far more than that.

Apart from being fast, another advantage of rapid prototyping is its low cost. It is especially suitable for making single or small quantities of samples. If the design is not satisfactory, it is very convenient to make modifications directly in the computer and reprint a new one. The materials are also quite flexible, ranging from common plastics, resins, to metal powders and even wax.

There are many methods to achieve rapid prototyping. Currently, the most mainstream one is 3D printing, including forms such as fused deposition modeling (FDM), stereolithography (SLA), and laser sintering (SLS). In addition, small CNC machines for direct cutting (CNC rapid processing), using silicone molds to replicate dozens of copies of the prototype, and laser cutting for rapid assembly structures, are also common methods.

In practical applications, rapid prototyping has a wide range of uses. Designers use it to create appearance models to check if the design is aesthetically pleasing; engineers use it to create structural models to test if the parts fit together smoothly and if the functions are reliable. It can also be used as a sample handboard for display at exhibitions, customer demonstrations, or market research, and even directly for small-batch custom production of dozens of pieces.

For example, if you want to design a brand-new mouse. In the past, you would simply draw the blueprint and wait for the lengthy mold-making process. Now, you just need to draw the three-dimensional model using CAD software and then use a 3D printer to get several physical mice overnight. When you hold it in your hand and find that the curved surface is uncomfortable, you can go back to the computer to modify the model, and the next day reprint another version. This "design-verify-modify" efficient cycle is precisely the core value of rapid prototyping.