Abstract
Laser texturing is a relatively new multiprocess technique that has been used for machining 3D curved surfaces; it is more flexible and efficient to create decorative texture on 3D curved surfaces of injection molds so as to improve the surface quality and achieve cosmetic surface of molded plastic parts. In this paper, a novel method of laser texturing 3D curved surface based on 3-axis galvanometer scanning unit has been presented to prevent the texturing of injection mold surface from much distortion which is often caused by traditional texturing processes. The novel method has been based on the computer texture mapping technology which has been developed and presented. The developed texture mapping algorithm includes surface triangulation, notations, distortion measurement, control, and numerical method. An interface of computer texture mapping has been built to implement the algorithm of texture mapping approach to controlled distortion rate of 3D texture math model from 2D original texture applied to curvature surface. Through a case study of laser texturing of a high curvature surface of injection mold of a mice top case, it shows that the novel method of laser texturing meets the quality standard of laser texturing of injection mold.
Highlights
Laser texturing is a relatively new multiprocess technique that has been used for creating decorative texture on injection molds to improve the surface quality and achieve cosmetic surface of molded plastic parts [1]
Texture mapping is a well-known technology in the field of traditional computer graphics, but it is quite new in the industries of laser texturing, marking, ablating, and engraving for the decoration of 3D surface of product or mold
Regarding to mapping distortion and warp, traditional texture mapping focuses on the research of control of uniform rate around whole surface, the interface of computer texture mapping developed in the paper can sacrifice unimportant area of surface with big rate, in order to ensure low rate in important area instead
Summary
Laser texturing is a relatively new multiprocess technique that has been used for creating decorative texture on injection molds to improve the surface quality and achieve cosmetic surface of molded plastic parts [1]. (ii) to give parts an evener, planned effect or to get rid of a glossy appearance, and change to a matte finish This can add richness to a part’s appearance, making the part more marketable and giving it a perception of higher value and quality;. Each of the purposed techniques is to remove materials from the surface of a component to form a texture or a pattern on the surface that will transform the visual appearance of the final product. Such techniques often cause distortion or warp of texture on 3D surface of mold cavity, especially on high curvature surface, since the texture is often projected on the surface instead of being mapped. Laser texturing is the best techniques with less distortion because the technology of computer mapping texturing is used, and the process is reproducible, accurate, flexible, and fully automated
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