Hot Melt Molding Case Study: "Waterproof Sealing of Printed Circuit Boards"
Low Pressure Molding, Hot Melt Molding, Waterproof and Dustproof, Encapsulation Molding
Waterproof sealing of the implementation substrate. We achieve process improvement and cost reduction by switching from potting.
Hot melt molding is a molding technology that involves injecting solvent-free, one-component thermoplastic hot melt adhesive into a mold under low pressure. This method is widely used for purposes such as dustproofing, waterproofing, vibration resistance, impact resistance, insulation, and housing functionality. In this catalog, we introduce a case where waterproof sealing of printed circuit boards has been replaced from urethane potting to hot melt molding. **Benefits of Hot Melt Molding** - It achieves significant process improvements by solidifying in just a few seconds. - Since it does not take time to solidify, it enables inline processing rather than batch processing like potting. - It realizes cost reduction in the process due to the above. - It allows for the creation of freely shaped designs in molds, achieving "compactness and lightweight." *For more details, please refer to the catalog or feel free to contact us.*
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【Conventional Method (Urethane Potting)】 ■ Housing is required ■ Potting material 15.3cc ■ No freedom in shape design ■ Heating curing time: 180 minutes ■ Curing process: Batch production 【New Method (Hot Melt Molding)】 ■ No housing required ■ Hot melt 7.1cc (lightweight) ■ Free shape design ■ Thermoplastic molding: 0.5 minutes ■ Molding process: Single piece flow *For more details, please refer to the catalog or feel free to contact us.
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Applications/Examples of results
- Waterproof sealing of automotive electrical components - Waterproof sealing of IoT-related components for outdoor installation - Waterproof sealing of small motors and related electrical components
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Our company provides comprehensive support for the introduction of hot melt molding methods, from initial technical discussions and appropriate hot melt selection to prototype production and evaluation, optimal process considerations for mass production, proposals for optimal equipment or the design and manufacturing of dedicated machines (automated systems), hot melt supply and line support. For customers for whom equipment installation poses a barrier to adopting this method, we even offer production contracting at our facility, ensuring support from "start to finish." **Benefits of Hot Melt Molding** - Improved production efficiency and cost reduction through alternative methods to potting - Greater design flexibility due to mold forming, enabling miniaturization and lightweighting of components - Use of sustainable raw materials derived from natural fatty acids We have various molding machines and displays of adopted products available at our prototype lab in Fuji City, Shizuoka Prefecture. Please feel free to visit, even just for a tour.