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181. The define of rapid prototyping

Rapid prototyping is the automatic construction of physical objects with 3D printers, SLA machines or selective laser sintering systems. Rapid prototyping is a type of computer-aided manufacturing (CAM) technology and is one of the components of rapid production tooling.

There are two main methods of rapid prototyping, which are derived from similar approaches in sculpture. In additive prototyping, the machine reads in data from a CAD drawing, and lays down successive micrometer or millimeter-thick layers of liquid plastic, powdered plastic or some other engineering material, and in this way builds up the model from a long series of cross sections.

Although traditional injection molding is still cheaper for manufacturing plastic products, soon rapid prototyping may be used to produce finished goods in a single step.

Other advances may include machines that are both additive and subtractive. Some consider the lamination technologies (laminated object manufacture) to already be dual strategy machines.

However, there are currently several schemes to improve rapid prototyper technology to the stage where a prototyper can manufacture its own component parts. The idea behind this is that a new machine could be assembled relatively cheaply from raw materials by the owner of an existing one. Such crude ’self-replication’ techniques could considerably reduce the cost of prototyping machines in the future, and hence any objects they are capable of manufacturing.