I ask about the mold design book, I am a mold programming, but not particularly understand the mold structure, I want to know more about the mold structure. Do you have good suggestion?

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Learn CAD software first and master at least one 2D/3D software. This is the most basic rigid requirement for mold design. Now the most popular 2D/3D software for mold design is AutoCAD and UG. Follow up to choose to learn stamping mold or plastic mold according to your own interests. What you are studying now is a mechanical major. You must learn mechanical drawing, metal materials and heat treatment well, which will be of great help to mold design in the future. As for books, there are a lot of basic enlightenment textbooks in the online mold forum, which is very good. There are too many theoretical things in the college mold course books. The content is 5 to 10 years behind the development of society.