What is the difference between rapid prototyping process methods

What is the difference between rapid prototyping process methods


News Dec 04 2019

Light curing rapid prototyping system and laser selective sintering rapid prototyping system are the two main processing methods in the application of hand model making. So what are the similarities and differences between these two rapid prototyping? 
1.The similarities between the two rapid prototyping technologies
The principles of these two molding technologies are very similar. In addition, they are indispensable technologies for the production of hand molds, and they are also widely used in industrial design.
2. Differences between two rapid prototyping technologies
3. The material used in the photo-curing rapid prototyping china system is a powdery substance. A liquid-shaped photosensitive resin used in the laser selective sintering rapid prototyping system. The advantage of the photo-curing rapid prototyping system is that all powdery substances can be dissolved. Both can be used to make prototypes or models, and the products produced can be used as the first test and structural assembly of the product. Therefore, the laser selective sintering method can use a wide range of materials, such as nylon materials, such as PC materials, such as other wax powder, and even some hardware materials can be done.
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Products processed through the above methods have relatively large differences in accuracy, but because the laser selective sintering method can sinter many materials, even some unpopular ceramic layers can be achieved, so the laser selective sintering method has more extensive applications. It has a wide range of applications in the industry and strong attractiveness. These characteristics can also cover up the shortcomings of its low accuracy, and the problem of rough surface and low efficiency. Because our customers understand these attributes, they can use their products as a reference when choosing a process.
For general handicrafts, products with high precision and surface finish requirements are suitable for rapid molding with light curing molding. If it is a general large product, the degree of roughness is not high and the product is relatively inexpensive, choose light curing molding laser powder. Sintered.
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Advantages of SLA:
1. Light curing molding method is an early rapid prototype manufacturing process with high maturity and time-tested.
2. Prototype is made directly from CAD digital model, with fast processing speed and short production cycle, no cutting tools and molds are needed.
3. It can process prototypes and molds with complex structure shapes or difficult to form using traditional methods.
4. Visualize CAD digital models and reduce the cost of error repair.
5. Provide samples for experiments, and verify and verify the results of computer simulation calculations.
6. Online operation and remote control are conducive to the automation of production.
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SLA flaws:
1. The SLA system is expensive to build and expensive to use and maintain.
2. The SLA system is a precision equipment to operate liquids, and has strict requirements on the working environment.
3. The molded parts are mostly resins, which have limited strength, stiffness and heat resistance, which is not conducive to long-term storage.
4. The pre-processing software and driver software have a large amount of calculation and are too highly correlated with the processing effect.
5. The software system is complicated to operate and difficult to get started. The file format used is not familiar to the majority of designers.
6. Stereoscopic light curing molding technology is monopolized by a single company.
SLA development trends and prospects
The development trend of three-dimensional light curing molding method is high speed, energy saving, environmental protection and miniaturization.


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