Two vapor deposition boards plus a transparent board are consolidated into a single layer. A thin, high-design light guide plate that also accommodates curved surfaces.
Conventional light guide plates typically consist of a three-layer structure made up of two vapor-deposited plates (front and back) and a transparent plate, which has made the high number of components a bottleneck for thinness and space-saving. Additionally, the method of combining plate materials made it difficult to accommodate three-dimensional shapes, greatly restricting design flexibility. By applying double in-mold forming to the production of light guide plates, both sides of the vapor-deposited foil are transferred within the mold simultaneously during injection molding. This consolidates the conventional three-layer structure into a single molded product, achieving significant thinness and a reduction in the number of components. Leveraging the design freedom unique to injection-molded products, it can accommodate curved and complex shapes that were impossible with traditional methods. This contributes to the high design quality and space-saving of automotive ambient lighting and LED panels for home appliances.
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basic information
【Main Technologies and Manufacturing Methods】 - Selection of appropriate transmittance reference values and control of transmittance for half-mirror deposited films - Optimization of mold structure and molding conditions tailored to half-mirror deposited films
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Applications/Examples of results
【Target Industries】 Automotive interiors, home appliances, lighting equipment 【Examples of Applications】 - Automotive ambient lighting - LED panels for home appliances 【Achievements】 Achieved thinning, weight reduction, and reduction in the number of components by changing the light guide plate from a three-layer structure to a single-layer structure. Significantly improved design flexibility by enabling complex shapes through molding.
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**About Yoshida Techno Works** We are the world's first manufacturer to commercialize in-mold transfer molding, which utilizes plastic molding and decoration technology cultivated through cosmetic container manufacturing, allowing for simultaneous molding and transfer decoration. **Key Technologies** - Double in-mold molding that performs simultaneous decoration on both sides of the product - Hybrid molding that combines sheet inserts with in-mold techniques - Glass insert in-mold (GIM) molding that inserts reinforced glass into the mold, allowing for integrated molding of resin frames and decoration - Two-color in-mold molding that combines rotational two-color molding with in-mold transfer - Composite technology that integrates metal (such as SUS sheet metal and nuts) with in-mold molding - Real material (natural wood, fabric, synthetic leather, etc.) insert molding - Out-mold deep drawing decoration method (VSS) compatible with metal, glass, and resin
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