Why is Apple so successful with its new designs? Well, one answer is that it breaks the rules when it comes to injection molding. One of the basic rules taught to new industrial designers is to always leave a draft angle so molded parts can be easily slipped from a mold cavity. Apple’s Designer-in-Chief Steve Jobs said the heck with that, according to an article in the current issue of MIT’s Technology Review. Apple designs computer housings with zero draft. It costs more for special ejection, but Apple achieves a unique box-like look. It also means designers can pack more in the housing and money is saved on packaging and shipping costs. But concept is king at Apple. Apple also makes extensive use of a two-shot molding process it calls “double back”.
Most of the new 3D printers and 3D printing technologies in this crop are breaking some boundaries, whether it's build volume-per-dollar ratios, multimaterials printing techniques, or new materials types.
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