I want to do small-scale plastic recycling and granulation.

Business secrets are generally not said. . Many skills are based on groping. For example, plastic coke bottles are all produced in factories and directly crushed, which is about the size of three 1 lighters. Then they are melted, squeezed by machines, and then thinned by machines. After several rounds of thinning (controllable thickness), it can be made into plastic blankets, building safety nets and so on. The recycled grain you want should be recycled plastic rice, which is also a popular saying. Plastic rice is twice. Not many are put into production, a crusher and a melting machine. The technology you need to master is 1 to distinguish plastic names. Some plastics can't be recycled, such as pressure cooker handles. Is the plastic made of raw rice (don't tell me you can't tell the difference between raw rice and secondary rice). Talk to the market about the price of recycled rice and calculate the cost. Invest in customers and investment, start-up funds, money for goods, etc. Anyway, you have to study these carefully. I suggest you recruit a master to do it directly, and learn while watching.