Do you think the molds are mass-produced by machines?
simplified injection mold making process
Design & Engineering: Design the mold based on the product's 3D model, planning how it will split open, eject parts, and be cooled.
Machining & Manufacturing: Use machine tools like CNC and EDM to create the core mold components (core and cavity).
Polishing & Assembly: Polish the machined parts to the required surface finish, then assemble them into a complete mold.
Mold Trial & Debugging: Install the mold in an injection molding machine for testing.
Mass Production: Once debugging is complete, the mold is ready for mass production of plastic parts.