Handheld Diagnostic Device

Posted September 21st, 2012 by Bailey Jones

In this post I’ll go behind the scenes for the design of a handheld diagnostic tool. The enclosure had to contain the circuit board, provide a graphical display and have two input buttons. After finalizing the conceptual design, I created the detailed design with Pro/Engineer. This software creates the files that can be used for prototyping and manufacturing. This video gives an overview of the CAD processes used to create the parts. I discuss implementing draft, which is necessary for the injection molding process, and creating a realistic image rendering.

Custom-enclosure from Bailey on Vimeo.

An important part of plastic design is to incorporate draft into the parts. Draft is the slight angle on the vertical features that allows the part to slip out of the tool. The image below shows a draft analysis of the top part. The two different colors represent the surfaces of the two different sides of the mold.

Pro/E draft analysis

Once all the individual parts have been modeled, they are all put together in an assembly. In the assembly you can check the fit of the pieces, test for interferences and evaluate the device as a unit.

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