What is the difference between genuine LEGO and domestic copycat LEGO? Why is Lego impossible to imitate?

Mainly because of the brand effect, in fact, there are a lot of LEGO this kind of blocks on the market, but the quality is similar.

After a long time of cable drops and continuous improvement of various toy shapes, LEGO molds have become a unique design pattern. A set of molds for a basic item (such as an RC car) is about -$10,000, a set of molds for LEGO blocks (such as a poor quality fake) is over $30,000, and high-end products require $40,000 or more. While making hundreds of molds for Legos is just one development, large companies have over 100 molds. For most small and medium-sized businesses in Yamasai Lego, that spread is a huge capital investment.

Legos are made primarily with ABS that has a unique formulation. the price of different types of ABS varies greatly. The price difference between a ton of material and other additives is tens of thousands of dollars. Material and mold compatibility. This includes material shrinkage, balance of elasticity and stiffness, shrinkage compensation in mold design, runner damage, feed rate, cooling, and demolding. Some of these are not fully theoretical innovations, so they must be tested and explored slowly, and the secrets of LEGO's raw materials remain secret. Domestic imitators have apparently adopted the generic and open recipe of ABS and its traditional mold design methods.

But no purposeful improvements were made, and secondly, the result is a very similar look, but with less coordination between toy particles than Lego. Flat areas deform and rounded areas shrink. This is the result of constant, accurate and relentless imitation. Many manufacturing industries have similar problems. If you spend 20% of your time, you can achieve 80% of the results. However, it usually takes 80% of the time to fill in the last 20%. This is why many Chinese products have low cost and acceptable results, but there is always a very noticeable gap between them and foreign products.

In fact, injection mold processing is even more important, depending on the level of the OEM company or their own manufacturing, which is less harmful to cost than molds and materials.