Wall thickness: Specifying a parts nominal wall thickness is the first step in determining its manufacturability, performance and cost.
Radii and chamfers: Applying radii or chamfers to sharp corners is of key importance for parts manufacturability, dimensional accuracy and load-carrying capacity.
Draft angle: Part surfaces parallel to the draw direction of the mold should be tapered to facilitate ejection of the part after molding.
Corrugations, ribs or gussets: By applying corrugations, ribs or gussets to a parts functional geometry, its structural performance can be improved.
Bosses: A boss is a cylindrical protrusion on a part and can have various functions, such as a positioning aid, a fixation point or a bearing surface.
Holes: A hole in a part can have many functions, including acting as a fixation point, offering passage to other parts and reducing a parts weight.
Coring: In the design of injection molded plastic parts, thick sections should be avoided. Coring, locally eliminating material in these sections, is a way to pursue a uniform wall thickness.
Undercuts: If a part has an undercut, it means that it can’t be ejected from the mold without taking specific measures regarding tool construction or additional operations during the molding cycle.
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