If you still don't understand, just think like this, such as shoes. If the vamp is to be molded and the shoe last is to lean against the vamp, then the shoe last is a mold. For example, the bricks used to build a house are all a box and a mold. Including the pottery pots used by primitive people in the Neolithic Age, they were also made of molds.
For example, buckets, lunch boxes, cups, home appliances, cars, etc., what you see and use are all made of molds.
It can be said that without molds, human beings can't have civilization! Modern westerners regard the origin of molds as invented by German shoemakers (Sweden, ruled by the former German emperor in ancient times), in fact, to prove that westerners are smarter than orientals.
In ancient China, molds appeared very early, and the visible object was Ding, which was cast with molds and dewaxed. Up to now, modern China people and modern west still can't surpass the technology of Shang and China people.
This is the pride of our culture.
For a modern country, the more developed a country's mold industry and the higher its mold level, it will enhance all aspects of the whole society, and then the country will be stronger. At present, our country is developing faster and faster, and various cutting-edge technologies are constantly succeeding and breaking through, which is related to the increasingly strong technology of China's mold industry in the past 20 years.
For example, 70% of die-casting parts and molds in the world are produced in China. Think about how much this has promoted all walks of life in China. Last year, Americans clamored to withdraw a car company from the United States. In addition to the unemployment factor in the United States, there is also a point that the technological leading position of die-casting molds, die-casting production, plastic molds and plastic production needed by the automobile industry is increasingly concentrated in China. I have dealt with many American engineers and feel that the mold level in their country is declining. Even some engineers who communicate with me don't know the mold as well as the mold engineers who graduated from our national training school.
So do you understand a little?