Final Design

Final CAD design

Components of our final design include two main sub-groups which are the static and dynamic components. The static parts provide the fluid delivery to the storage tank and the needles. The dynamic parts connect the driver device in order to provide the necessary axial movement to the array of needles.

Static Components shown in CAD (left) and 3D printed (right).

Dynamic Components in CAD (left) and 3D printed (right).

Final Assembled Prototype.

Assembled Prototype being used by an Operator.

The newly developed prototype was first designed using SolidWorks and fluid analysis was conducted through ANSYS to answer any engineering questions during the optimization period. The new micro needling device model has four holes for the 32-gauge hollow needles to be inserted with a storage tank that can hold up to 5 mL of cosmeceuticals. An o-ring seal was placed just above the storage tank to prevent leaking of the desired fluid. In addition, the mechanical power was generated from the driving pen which allowed the axial oscillation of the driving rod system. This pen converted electrical energy into kinetic energy which oscillated the needle layer in a vertical motion at a constant rate in order to conduct the skin puncturing during the procedure. The final prototype managed to deliver water successfully out of the storage tank and through the holes where the hollow needles would be placed with very little to no fluid leakage. The assembly of the microneedling cartridge was put together very easily, and the cost is cheap enough to have effective mass production.