Zero gaps between glass and resin. Integrated molding of glass, metal, and in-mold elements in one process.
In the glass bonding to the resin frame, it was not possible to achieve zero "gaps," and due to the dimensional variations in the glass, a seamless appearance could not be realized in the subsequent bonding process. We established a unique method that aligns the 3D shape of the glass with the shape of the mold for insert molding, simultaneously implementing metal inserts and in-mold decoration during the molding process. This method achieves the insertion of three different materials: glass, metal, and in-mold (decoration) in the same molding process. We developed a unique mold mechanism that absorbs the individual differences (dimensional variations) of the glass, realizing a seamless sealing structure without the need for tape and enabling larger screen sizes. There is a proven track record of being adopted in ultra-high-end premium smartphones.
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basic information
【Main Technologies and Methods】 - Glass individual difference absorption mechanism (glass position correction within the mold) - 3D glass and mold cavity shape matching technology - Position accuracy improvement through insert centering and guide pins - Optimization of molding conditions for simultaneous insertion of three elements (glass + metal + in-mold foil)
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Applications/Examples of results
【Target Industries】 Smartphones, Tablets 【Example Applications】 - Smartphone display panels - Tablet front panels 【Achievements】 Achieved a seamless sealing structure without the need for tape and enabled larger screens. Adopted in ultra-high-end premium smartphones.
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Company information
**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