Guaranteed waterproof quality of glass inserts for all units | Air leak testing + rework system
It does not overlook even the fine leaks at the glass-resin interface. Mass production quality assurance for waterproofing through comprehensive air leak inspection.
In glass insert molding (GIM) products, while waterproof guarantees are required, it has been difficult to establish a system for detecting and guaranteeing minute leaks at the interface between glass and resin for all products. We introduced an air leak testing machine, set threshold values for each product, and conducted 100% inspection. For products that failed the tests, we established a rework system to apply impregnation adhesive through additional processing. Furthermore, we improved structural waterproofing by enhancing glass positioning accuracy with centering on the insert glass support and guide pins. We have established a quality assurance system for all GIM waterproof products, which supports waterproof smartphone cover panels and more.
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basic information
【Main Technologies and Methods】 - Selection of air leak testing equipment, threshold setting, and optimization of inspection conditions - Rework process design using impregnation adhesives - Centering mechanism for insert glass
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Applications/Examples of results
【Target Industry】 Smartphones (Waterproof Models) 【Target Application Examples】 - Cover panels for waterproof smartphones - Exterior of waterproof devices 【Achievements】 Established a comprehensive quality assurance system for all GIM waterproof products.
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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