Methods for setting multiple sets of slice printing parameters of photocuring 3D printing models

Abstract

The invention mainly provides four methods for setting multiple sets of slice printing parameters of photocuring 3D printing models. In the method 1, a user can print a batch of dozens of same models and can set different accurate and dense stepped parameters respectively. In the method 2, a user can set different model slice printing parameters for a plurality of same models in each set in groups while printing a batch of multiple sets of different models. In the method 3, a user can divide the 3D model into different areas according to the height, and when a batch of one or more same models are printed, the 3D model can be divided into different areas according to the height, and model slice printing parameters are independently set. In the method 4, the user divides the 3D model into different slice parameter setting ranges on the XY plane with different preset cross section areas as comparison standards, and when one or more models are printed in a batch, the models can be divided into the different slice parameter setting ranges according to the different preset cross section areas, and model slice printing parameters are independently set.

Description

technical field [0001] The present application relates to the technical field of 3D printing, in particular to a method for setting multiple slice printing parameters of a photocuring 3D printing model. Background technique [0002] At present, in the existing light-curing 3D printing, different photosensitive resin molding reaction exposure time parameters generally use the recommended resin characteristic parameters of the resin brand specified by each light-curing machine factory, but if the user chooses to choose other brand resins At this time, it is necessary to go through several printing tests to obtain the appropriate recommended value. At this time, it is easy to encounter the following problems: 1. When selecting different resins, in the existing technology, nearly ten or more models need to be printed one by one and set up. Only by setting different printing parameters of stepped slices can the corresponding optimal resin characteristic parameters be selected fro...

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing photocuring 3D printing, the exposure time parameters of different photosensitive resin molding reactions generally adopt the recommended values ​​of the resin characteristic parameters of the resin brand specified by each photocuring machine factory, but if the user chooses to choose other brand resins At this time, it is necessary to go through multiple printing tests to get a suitable recommended value. At this time, it is easy to encounter the following problems: 1. When choosing different resins, it is necessary to print nearly ten or more models one by one in the existing technology and set Only by setting different stepwise slice printing parameters can the corresponding optimal resin characteristic parameters be selected in the optimal printed product. This way of testing the printing time is too long; 2. For some characteristic resins, the resin molding reaction time is particularly accurate. Sometimes the reaction time needs to be accurate to 1 decimal place, resulting in a huge test workload, and it is impossible to see the molding difference caused by the time difference at the same time;

[0003] Secondly, in the existing light-curing 3D printing, the slices of the printed model are generally sliced ​​according to the set uniform layer thickness. When the appearance of the printed model is relatively smooth and complete, it can be printed with a thicker model slice , to increase the printing speed; when there are small feature details in the appearance of the printed model, it is necessary to print with thinner model slices to ensure the smoothness of the details; at this time, it is easy to encounter the following problems: 1. The appearance of the printed model is large When the part is relatively smooth, if there are several small feature details at the same time, if a thicker layer thickness is used to slice uniformly, the details of several small feature details will be rough after printing, and the smoothness will be poor; 2. Printing When the appearance of the model is mostly smooth, if there are several small feature details at the same time, if a thinner layer thickness is uniformly sliced, the parts other than the feature details will consume a lot of printing time;

[0004] In addition, in the existing light-curing 3D printing, the model slice is generally a single exposure of the single-layer slice image as a whole, and during the entire printing process, the movement strategy of the forming platform is relatively simple, and it is directly lifted or lowered at a fixed speed. This method can meet the basic printing needs, but it is easy to encounter the following problems: 1. For models with large changes in the area of ​​the slice layer, if a lower lifting speed is used for printing, the printing success rate of large and extremely small areas will increase. However, the overall printing time will be much longer; if a higher lifting speed is used in the entire printing process, the overall printing time of the model can be shortened, but for sliced ​​​​images with large areas or very small areas, because the larger release speed will lead to The increase of the instantaneous release force and the vibration of the instantaneous release will easily lead to printing failure; 2. A single overall exposure of a large-area layer will cause a large amount of heat emitted by the resin reaction, which will easily lead to a change in the performance of the resin that becomes more active, resulting in excessive reaction; the stress generated at the same time is also large, for example, the upper and lower layers in the cross-sectional area have a sudden change, because the stress generated when the large-area and small-area layers are solidified is not the same, it is easy to cause deformation in the transition stage

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