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  6. Hot melt contract molding for waterproofing of substrates and components ■ Matsumoto Processing ■

Hot melt contract molding for waterproofing of substrates and components ■ Matsumoto Processing ■

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Low Pressure Molding, Hot Melt Molding, Waterproof and Dustproof, Encapsulation Molding

last updated:Sep 09, 2025

松本加工
松本加工
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Complete sealing of electronic components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation! We offer contract processing for hot melt molding sealing.

"I want to use hot melt molding, but I can't install the equipment." For such customers, our factory has installed nine hot melt molding machines, and we will perform hot melt molding on the insert work provided by the customer. We can provide a comprehensive response, including selection of sealing agents, prototyping, mold manufacturing, and contract sealing processing. Available hot melts: - Polyamide-based - Polyolefin-based - Reactive polyurethane-based ◆ If you are interested, please feel free to contact us.

    Other electronic partsOther polymer materialsCoating Agent
静岡の技-2.jpg

Hot melt contract molding for waterproofing of substrates and components ■ Matsumoto Processing ■

静岡の技-2.jpg
静岡の技-2.jpg 静岡の技-1.jpg motor.jpg PCB2.jpg
  • Matsumoto Processing Official Website
  • Special site - Product/service details - https://pr.mono.ipros.com/matsutame/product/

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basic information

Our company provides consistent technical support under the customer-first philosophy, from product shape design, prototype mold design and manufacturing, prototype evaluation, process proposals during mass production, to molding equipment design and manufacturing, and mass production startup support. Our factory has obtained ISO 9001/14001 certification. For customers with low production volumes or those who find it difficult to introduce equipment, as well as for development products where production quantity forecasts are uncertain, we can undertake sealing processing at our factory. Additionally, we also manufacture circuit boards and assemble harnesses according to customer requests. Please feel free to consult with us.

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Applications/Examples of results

- Vehicle-mounted sensor components - Wire harness - Control board etc.....

Detailed information

  • PCB2.jpg

    Examples of waterproof sealing for agricultural machinery substrates. The left photo shows before sealing, and the right photo shows after sealing (the black part is the hot melt molded section).

  • PCB.jpg

    Examples of encapsulation for industrial equipment circuit boards. The left photo shows before encapsulation, and the right photo shows after encapsulation (the black area is the hot melt molding section).

  • motor.jpg

    Examples of waterproof sealing for motor stators. The amber-colored areas around the circuit board and coils in the photo are hot melt molded sections.

catalog(12)

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Hot Melt Molding Product Case Studies (Photos Before*After)

Hot Melt Molding Product Case Studies (Photos Before*After)

TECHNICAL
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"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Differences between potting methods and hot melt molding methods.

"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Differences between potting methods and hot melt molding methods.

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"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Case studies on hot melt molding. ■Matsumoto Processing■

"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Case studies on hot melt molding. ■Matsumoto Processing■

TECHNICAL
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"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Case studies on hot melt molding (automotive parts) ■Matsumoto Processing■

"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Case studies on hot melt molding (automotive parts) ■Matsumoto Processing■

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"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Technical document: Introduction to hot melt molding. ■Matsumoto Processing■

"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Technical document: Introduction to hot melt molding. ■Matsumoto Processing■

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"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK700H by Matsumoto Processing.

"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK700H by Matsumoto Processing.

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"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK600 ■ Matsumoto Processing ■

"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK600 ■ Matsumoto Processing ■

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"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK520 ■ Matsumoto Processing ■

"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK520 ■ Matsumoto Processing ■

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"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK500 by Matsumoto Processing.

"Complete sealing of electrical components in just a few dozen seconds. Waterproof, dustproof, and insulated." Hot melt molding machine MK500 by Matsumoto Processing.

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Low-cost & High-tactile molding machine MK10 ■Matsumoto Processing■

Low-cost & High-tactile molding machine MK10 ■Matsumoto Processing■

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Hot Melt Applicator MK-MELTER ■Matsumoto Processing■

Hot Melt Applicator MK-MELTER ■Matsumoto Processing■

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"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulating" - Polyamide-based hot melt for molding.

"Complete sealing of electronic components in just a few dozen seconds. Waterproof, dustproof, and insulating" - Polyamide-based hot melt for molding.

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News about this product(34)

Introducing the waterproof, dustproof, and insulation protection technology for various electrical components called "hot melt molding." Sealing is completed in just a few dozen seconds, achieving process improvement and cost reduction.

  • Product news

The technology "Hot Melt Molding," which is expanding its adoption for waterproofing, dustproofing, and insulation protection of various electrical components, rapidly solidifies thermoplastic hot melt adhesives within molds, completing sealing in a short time of just a few dozen seconds. Compared to traditional urethane potting and epoxy potting, this technology allows for sealing to be completed in an ultra-short time, leading to alternatives aimed at process improvement and cost reduction. Additionally, because it involves mold forming, it offers high freedom of shape, receiving high praise for miniaturization and lightweighting of components. Our company, Matsumoto Processing, has been involved in the protection of many electrical components, including automotive electrical components, as a pioneer of this technology alongside our customers. We can achieve material selection, specification consideration, prototype shape design, mold manufacturing, and prototyping in a short time. Customers interested in this technology are encouraged to feel free to contact us.

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Colorless transparent hot melt molded product

"Complete sealing of electrical components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation!" Hot melt molding, which is gaining attention for waterproof sealing of electrical components, introduces a hot melt with excellent optical properties that were not present in conventional products.

  • Product news

Complete sealing of electronic components in just a few dozen seconds. Ideal for waterproofing, dustproofing, and insulation! We have received numerous inquiries and requests regarding hot melt molding for waterproof sealing of LED lighting fixtures, electronic components, optical sensors, and more. However, conventional hot melts had a strong yellow tint and issues with light transmittance. The newly introduced hot melt has extremely high transparency and excellent UV resistance, making it suitable for applications such as lighting components and optical sensors. If you would like to see samples or need detailed information, please feel free to contact us.

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We have uploaded a video introduction page about the waterproof sealing method for electrical components, "Hot Melt Molding." Please take a look.

  • Company news

We will introduce the waterproof sealing method for electrical components, "Hot Melt Molding," in a video. - Video introduction of the sealing process using various molding machines - Comparison between Hot Melt Molding and Potting - Video introduction of case studies using Hot Melt Molding and more. Please take a look!

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Hot Melt Molding Matsumoto Processing: Notice of Website Update: Please take a look.

  • Company news

Matsumoto Processing's "Hot Melt Molding," which focuses on waterproof sealing and insulation of electrical components, is gaining attention as an alternative technology to two-component potting. Traditionally, we have had many customers frequently visiting our prototype lab, but recently, we have received feedback that it has become difficult for them to come to our company due to the COVID-19 pandemic. Therefore, we have updated our website to more specifically introduce the advantages of hot melt molding and our technology. <Highlights> - Photos of various products sealed with hot melt - Video of USB hot melt molding sealing - Downloadable catalogs and technical materials Please take a look. URL: https://www.mtkk.co.jp/

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松本加工

松本加工

Resin/Plastic

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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.

Product/Service List (49)

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