Radio interface - Value engineering of keypad light guide
This moulding project was proposed as a value engineering exercise. The result was a considerably cheaper moulded part that had been produced from machined acrylic.
The part is used as a light guide and operates in low light level conditions. The light guide creates a backlit effect on the keypad using LEDs.
On the machined version there is a slot right through the part, around the display (as shown), to act as a light break. It was not possible to mould this detail in, so 3Minds designed a separate window that is ultrasonically welded in place after moulding.
The critical elements in the design were controlling the part thicknesses which involved careful liaison with the moulder and toolmaker. The size difference of the two parts in the same tool was of particular importance for feed, flow and ejection.
Transport system operator interface - sub-contract design for machined aluminium chassis
The re-design involved extending the front panel envelope to create space for a new display and backlight.
The existing design was modelled to verify existing data and ensure accuracy. The solution for the first 100 units was to provide a machined aluminium front plate.
3Minds also laid out the front panel graphics using previous designs and rail standards for optimal clarity.
When production obtains higher volume then the machining will either be outsourced overseas or the plate will be redeveloped using SPZ or another technology depending on costs.
