According to the shape of the parts, the rapid prototyping system can make a section with a certain thickness and a specific shape at a time, and then bond them layer by layer to get the three-dimensional parts that need to be manufactured. Of course, the whole process is controlled by computer and completed automatically by rapid prototyping system.
Rapid prototyping can directly accept product design (CAD) data without preparing any mold, tool and fixture, and quickly manufacture new product samples, molds or models. Therefore, the popularization and application of RP technology can greatly shorten the new product development cycle, reduce the development cost and improve the development quality. From the traditional "removal method" to today's "growth method", and from mold manufacturing to mold free manufacturing, this is the revolutionary significance of RP technology to manufacturing industry.
The basic principle of rapid prototyping technology is as follows:
The three-dimensional data model in the computer is sliced by layers to obtain the profile data of each layer cross-section. According to the information, the computer controls the laser (or nozzle) to selectively sinter layer by layer powder material (or solidify layer after layer of liquid photosensitive resin, or cut layer by layer of sheet material, or spray layer by layer of hot-melt material or adhesive) to form a layer by layer A series of sheet-like bodies with a small thickness can be made into one layer by layer by means of fusion, polymerization, bonding, etc., so as to produce the designed new product sample, model or mold.