I'm currently working with other students in my program (plastics engineering) and students from other majors (tooling and mold design) to develop a mold for a driver and a putter. We used CATIA to draw the prototype of the disc and the mold halves. You would be surprised at how difficult designing the mold is, especially on a budget that is almost $0 (the idea was to use an old mold base and have steel plates for inserts donated from a company nearby). Because the plastic injects into the underside of the disc, it sticks to the core side of the mold, so figuring out the ejection is going to be a little tricky. If you look at a disc, there are no ejector marks, and usually ejection is done on the movable platen; but with discs it is just a curved dome on top, so they don't stick to the movable platen. The only thing we could think to use was a stripper plate to push the disc off of the core. Does anybody know a little bit more about the technology used with regards to mold design for producing a disc? We are also trying to figure out what type of plastic is used. We have a general idea, but obviously its not something you can just look up on the web, and the manufacturers probably use a special blend anyways. I think I will create a new thread to find information about the materials used... Any help would be appreciated, thanks in advance