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In this video demonstration I explained about Single Layer, and Dual Layer (DL) DVD’s storage capacities, logic behind DL DVD’s less storage data, data storage basics on DVD’s. A DVD is composed of several layers of plastic, totaling about 1.2 millimeters thick. Each layer is created by injection molding polycarbonate plastic. This process forms a disc that has microscopic bumps arranged as a single, continuous and extremely long spiral track of data. More on the bumps later. Once the clear pieces of polycarbonate are formed, a thin reflective layer is sputtered onto the disc, covering the bumps. Aluminum is used behind the inner layers, but a semi-reflective gold layer is used for the outer layers, allowing the laser to focus through the outer and onto the inner layers. After all of the layers are made, each one is coated with lacquer, squeezed together and cured under infrared light. For single-sided discs, the label is silk-screened onto the nonreadable side. Double-sided discs are printed only on the nonreadable area near the hole in the middle.
Video Rating: 4 / 5

Question by Rani8326: how do I use my full potential as a mechanical engineer in a Tool Room in plastic industry?
I want to know how can I use my my full potential as a plastic injection mould making pofessional ?

Best answer:

Answer by cheyenne95129
A ME doesnt belong in a tool room in a plastic injection house.
If you cant find a job at a OEM and you have to be at the “squirt house” you can design better tools . Remember multiple cavities, flow of coolant and ejection methods.
Most Plastic houses use unskilled workers to operate the presses so you must out guess what they will do, ( or NOT do…). Otherwise the next day you will have a truckload of bad parts and lose money. My experience is that short shots and such are not detected by operators that are focused on quotas of parts. start slow. Learn from the experienced toolmakers..Good Luck

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