Principle of shell extraction of thick models
For thick models, it is recommended to extract their shells if performance is not affected. The extraction of shells can reduce the weight and cost of the model. For large-surface models, reinforcement is advised to be employed after extraction, which can greatly reduce the deformation of models. Model structures need taking into consideration to decide whether to reinforce or not.
Principle of assembly parts
Assembly models generally have several independent shells. For easy disassembly of assembly models, model disassembly is recommended during processing, so that the independent placement of parts and the best surface quality of the product are not affected. The recommended assembly gap is more than 0.3mm.
Principle of parts splicing
For oversized pieces beyond the size of the processing platform, splicing can be used. The recommended assembly gap is more than 0.3mm. Triangle, rectangle, serrated, tab, and pin type by using AB glue for positioning connection can be added during splicing.
Principle of hole-drilling
Hole-drilling is required in the minor surfaces of the model to ensure the smooth flow of liquid resin in the inner cavity of the model after extracting the shell to reduce the weight of the model and lower the cost of model manufacturing. The diameter of holes is related to the surface size of the model, but it is generally recommended that the minimum diameter is 3mm and the maximum 30mm. The exact diameter should be designed according to the size and specific structure of the model.
Principle of coloring
For simple coloring, integrated processing and then coloring is recommended, while for complex coloring, the model should be disassembled according to coloring requirements, and then be assembled after coloring. For assembly, the connected structure and gap are set by the principle of splicing.