Most people who teach design by themselves have a foundation in fitter. I feel that I understand the structure, as long as you learn drawing software such as CAD and UG, you don't need someone to bring it. In fact, this idea is wrong, and it doesn't matter if the small factory draws and processes it by itself. I knew it because I was wrong, but I couldn't make it to the big scene, because it was easy to show off. Design needs to understand that the content is far from what fitter sees.
This includes several major sections: software, mold basic knowledge, product development, technology, material belt production, standard parts selection, mold structure design, mold assembly process, etc. Just think about it, can this be a software? For those with a weak foundation, if you want to learn design, it is recommended to find a job where you can see the mold first, and then learn slowly while exploring. A person who has never seen a mold is definitely impossible to learn how to design. If it is a master fitter and a mold repairer, the situation is different. Start with the software first, and then draw out the molds that you have taken over as much as possible, and it's okay to find the design and talk about the craftsmanship.
Don't stare at the software, because the fitter who masters the method can complete the software in only a week. The difficult thing is how to change the design thinking, because the fixed thinking of fitter is difficult to change at once. The process of mold design is: meeting before mold opening, analyzing product, combining, determining burr direction, turning 2D, unfolding, placing tolerance, discharging belt/process, setting material, drawing mold structure, general drawing (structure-positioning-avoidance) Position-standard parts-accessories inspection), sub-template, draw parts drawings, produce drawings, make bom tables.
Special supplements according to the design process will double our learning progress. Of course, if you have a professional designer to guide you during the learning process, you will get twice the result with half the effort (provided that the designer must have considerable practical experience)