How to design a rapid prototype?

Step 1 :

Create a 3dimensional cad model: CAD stands for computer assisted design, where a computer creates a 3 dimensional model. if you wish assistance in the process please visit our design engineering page.

Almost all rapid prototype technology systems need an 3d input such as Stl files ( Stl stands for  Standard Tessellation Language) or Iges-format, and that is why first of all a 3d cad model has to be made. If you don not have access to a 3d cad program this work can be outsourced of course. 3d cad program such as Solid works, Pro-engineer and NX are use by industrial design engineers and they can create such 3d cad formats for you. with the help of these  programs the engineer creates the part or product and the output in electronic form is a "manual/ description" ( in vectors) for the prototype machine.

 

Step 2 :

the STL File will be sliced: In the second step, a  computerprogram will prepare the STL file that will be converted into a real model. there are many programs are available, and most allow the user to adjust the size, location and orientation of the model. Build orientation is important for several reasons. First, properties of rapid prototypes vary from one coordinate direction to another. For example, prototypes are usually weaker and less accurate in the z (vertical) direction than in the x-y plane. In addition, part orientation partially determines the amount of time required to build the model. Placing the shortest dimension in the z direction reduces the number of layers, thereby shortening build time.

The pre-processing software cuts the STL file-model into a number of layers from 0.01 mm to 0.7 mm thick, depending on the buildup technology. The program may also generate an auxiliary structure to support the model during the build. Supports are useful for delicate features such as overhangs, internal cavities, and thin-walled sections. Each PR machine manufacturer supplies their own proprietary pre-processing software.

Layer by Layer Construction: The fourth step is the actual construction of the part. Using one of several techniques (described in the next section) RP machines build one layer at a time from polymers, paper, or powdered metal. Most machines are fairly autonomous, needing little human intervention.