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A low-pressure molding method that replaces 2-liquid potting, achieving improved production efficiency and miniaturization. Case studies will be presented at Nepcon Japan in September 2026!

For more details, please download the materials or feel free to contact us.

Waterproof and dustproof components for drone electrical equipment 【Hot melt low-pressure molding sealing】 The hot melt molding sealing method, which boasts high reliability in protecting automotive electrical components, is applied to drones.

Waterproof rating: ~IPX8 Operating temperature: -40 to 150°C Flame retardancy: UL94 V-0

Free collection of case studies and technical materials packed with tips and know-how for improving processes related to waterproofing, dustproofing, and insulation of implementation substrates!

Our company provides comprehensive support from the initial technical discussions and prototype production and evaluation, to the examination of optimal processes for mass production, equipment proposals, design and manufacturing of dedicated machines (automated systems), supply of resin materials, and line support. Additionally, for customers who find it difficult to introduce equipment, we offer contract manufacturing services at our factory. 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 if it's just for a tour.

Waterproof sealing and insulation of electrical components using hot melt molding. Case studies will be presented at Nepcon Japan (Autumn) in September 2026.

Separate meeting.

Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated. We will introduce the introduction process and case studies of hot melt molding in a 5-minute video.

Our company consistently provides technical support under the customer-first philosophy, from product shape design and prototype mold design and manufacturing, to prototyping in our lab, evaluation of prototypes, proposals for mass production processes, design and manufacturing of molding equipment, and support for mass production startup. Our in-house sales and technical staff, with their extensive experience in hundreds of cases, utilize 3D-CAD design, strength analysis, and PLC control design technology to propose the optimal production systems for our customers, ranging from tabletop machines to fully automated inline equipment.

"Complete sealing of electronic components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation!" Hot melt molding is gaining attention for the waterproof sealing of electronic components.

●What is Hot Melt Molding? It is a technology that demonstrates excellent sealing performance by directly injecting hot melt adhesive into electronic components. □Advantages of Adoption 1. Reduction in Processing Time Hot melt molding completes one molding cycle in about 10 seconds to several tens of seconds. There is no need for curing time like in potting. 2. Reduction in Number of Parts Hot melt molding eliminates the need for a case. This allows for a reduction in the number of parts and production man-hours. 3. Miniaturization and Weight Reduction Hot melt molding can be shaped with minimal wall thickness along the insert components. This is expected to reduce the amount of resin used, leading to miniaturization and weight reduction. Matsumoto Processing will respond quickly to the selection of suitable hot melts, modeling of molding shapes, analysis, mold production, and prototyping after understanding the reliability required for your products. For customers wishing to introduce hot melt sealing processes in-house, we provide comprehensive support including the production and sale of molding machines and molds, development of molding parameters, process startup assistance, and supply of hot melts. For customers who wish to outsource the hot melt sealing process, we offer contract molding services.

Waterproofing, insulation, and dustproofing for electrical components! We are currently offering a free collection of 'case studies and technical materials' filled with tips and know-how for process improvement!

Our company provides comprehensive support from the initial technical discussions, prototype production and evaluation, process considerations for mass production, equipment proposals, design and manufacturing of dedicated machines (automated systems), hot melt supply, to line support. Additionally, for customers who find it difficult to introduce equipment, we offer contract manufacturing services at our factory. 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 if just for a tour.

Hot melt molding, which is gaining attention as a waterproof sealing method alternative to potting. Sealing is completed in just a few dozen seconds per cycle. Contributes to cost reduction!

What is hot melt molding? Advantages of hot melt molding How to get started with hot melt molding? We will answer such questions. ■Please download the catalog from below. Matsumoto Processing will respond quickly to your needs by proposing the optimal hot melt solution, modeling sealing shapes, designing and manufacturing molds, and creating prototypes based on your product reliability requirements. For customers wishing to implement hot melt sealing processes in-house, we provide comprehensive support including the manufacturing and sales of molding machines and molds, development of molding parameters, process startup assistance, and hot melt supply. For customers who wish to outsource hot melt sealing, we offer contract molding services at our factory.

"Complete sealing of electrical components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation!" Hot melt molding is gaining attention for the waterproof sealing of electrical components.

Hot melt molding is gaining popularity in automotive electrical components due to its excellent productivity and ability to contribute to miniaturization and lightweight design. Matsumoto Processing, after understanding the reliability requirements of our customers' products, provides optimal hot melt proposals, sealing shape modeling, analysis, mold manufacturing, and prototyping in a short period. For customers wishing to introduce hot melt sealing processes in-house, we offer comprehensive support including the manufacturing and sale of molding machines and molds, development of molding parameters, process startup assistance, and supply of hot melt materials. For customers who wish to outsource the hot melt sealing process, we provide contract molding services at our own factory.

Complete sealing of electrical components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation! Hot melt molding is gaining attention for the waterproof sealing of electrical components.

Examples of Contract Processing Customer 1: Coil Manufacturer They want to seal large coils for incorporation into equipment using hot melt, but with a production volume of about 10 units per month, they cannot expect to recover the investment even if they introduce a molding machine... → Contract processing with Matsumoto. Customer 2: Electronics Manufacturer They want to seal parts of HEMS-related devices with hot melt. They have a plan that spans a decade for widespread adoption, but for the first five years, the production numbers will be very low, and they want to refrain from capital investment. If production numbers increase steadily after five years, they would like to introduce equipment at that time. → Contract production with Matsumoto. Additionally, Matsumoto, which also handles equipment, provides peace of mind when it comes to equipment introduction. Customer 3: Home Appliance Manufacturer The model life is short, around one year, and they are unsure if the next model will also require hot melt sealing, so they cannot make capital investments. → Contract production with Matsumoto. Customer 4: Lighting Equipment Manufacturer There are significant fluctuations in production quantities, making it impossible to set up processes in-house. → Contract production with Matsumoto.