Abstract
There are many difficulty in collecting data from a diffused reflection surface using an optical 3D scanning device. A spray-type developer and silicon molds are used for solving this problem. However, using developer can cause chemical reactions between objects and developer particles and uneven surfaces of the object. To overcome these problems, it is suggested an electrostatic powder coating method for even coating of particles onto surfaces for collecting 3D shape data. We have developed an automatic, electrostatic powder coating machine. The present study is aimed to explore powder materials suitable for electrostatic powder coating in terms of the easiness of coating work considering the characteristics of object surface. It was also conducted to verify materials that are smoothly coated well under various coating conditions and are advantageous in collecting 3D shape data.
Highlights
As the cultural content industry and the 3D printing industry have been developing, demand for 3D shape digital information has been increasing day by day and contactless white light scanners and laser scanners have been the most widely utilized in constructing such information
Whereas contactless 3D scanners that use light or laser are excellent in terms of measuring efficiency and accuracy, they have a demerit in that some of data are not collected from surfaces where irregular reflection or scattering occurs such as glossy metal surfaces, crystal, and ceramics because sensed lights are not properly recognized. Indirect measuring methods such as thinly applying a developer before scanning or making silicon molds have been used for such surfaces
The present study is a follow-up study of the previous study and aimed to explore powder materials suitable for electrostatic powder coating in terms of the easiness of coating work considering the characteristics of object surface
Summary
As the cultural content industry and the 3D printing industry have been developing, demand for 3D shape digital information has been increasing day by day and contactless white light scanners and laser scanners have been the most widely utilized in constructing such information. Coating thicknesses cannot be made uniform because developers or coating agents flow down because of the nature of liquids, form accuracy is deteriorated because liquids infiltrate into cracks or sharp grooves and harden there, and removing the hardened liquids after work requires great effort. To solve these problems, a device that can coat or remove developers while reducing coating thicknesses by introducing the principle of electrostatic powder. The present study was conducted to verify materials that are smoothly coated well under various coating conditions and are advantageous in collecting 3D shape data and to accumulate the results in order to utilize them as practical technical data
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