1. Light curing molding

(SLA) advantages:

(1) Texture rapid prototyping has high dimensional accuracy. SLA prototypes can achieve dimensional accuracy of ±0.1mm

(2) The surface quality is good. Although there may be steps on the sides and curved surfaces when each layer is cured, the upper surface still gives a glassy effect.

(3) It is possible to produce a model with a very complicated structure.

(4) Texture rapid prototyping can directly produce a vanishing type with a hollow structure for investment casting precision casting.

Disadvantages:

1) Texture rapid prototyping dimensional stability is poor. The rapid prototyping process is accompanied by physical and chemical changes, which cause the soft and thin parts to be prone to warp deformation, thus greatly affecting the overall dimensional accuracy of the molded part.

2) It is necessary to design the supporting structure of the molded part, otherwise it will cause deformation of the molded part. The support structure needs to be manually removed when the molded part is not completely cured, and the formability is easily broken.

3) Equipment operation and maintenance costs are high. Due to the high price of texture rapid prototyping liquid resin materials and lasers, and in order to make the optical components in an ideal working state, regular adjustments and maintenance are required, which is costly.

4) The types of materials that can be used are small. The materials currently available are mainly photosensitive liquid resin materials, and in too many cases, the molded parts cannot be tested for resistance and heat.

5) Liquid resin has odor and toxicity, and needs to be protected from light to prevent its polymerization reaction in advance, which has limitations in selection.

6) Secondary curing is required. In many cases, the photocured prototype resin after the texturing rapid prototyping system is not fully laser cured, so secondary curing is usually required.

7) The performance of the liquid resin after curing is not as good as that of the commonly used industrial plastics. The rapid prototyping of the texture is generally brittle, easy to break, and inconvenient for machining.