Basic Product Constructions

Product Design Sketching

Undercuts

Undercut is an essential consideration in product design. It refers to the condition when the molding of a part cannot be readily removed upon completion of the formation process

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Undercut problem

Undercuts

Most often it is undesirable to have a part with undercuts because it is more costly for manufacturing

Undercuts could be avoided by further dividing the massing of the product in sub-components

One-shot Production

Aurélio Flôres’ stainless steel wire jewelry

Principle Classification(原理分类 ) Mechanical Link(机械连接 ) Adhesion(粘接 ) Fusion(焊接 )

Functional Classification(功能分类 ) Dynamic Links(动连接 ) Static Joint(静连接 )

Slides

Telescope

Screw

Hinge

Barrel

Spring

Tent

Buckle

Static Links

Friction

Screw

Hinges and Rotation

Due attention should be given to rotating parts at hinges because the rotation would mean additional spatial requirement

This principle applies to other operable parts as well

This area should be cleared for the rotation to take placeRotating part

Buttons

Consideration should be given to the spatial requirement of buttons. Sufficient clearance should be given when doing packaging design of a product.