Need Waterproof and Impact-resistant Protection for Your Electronic Components? COMOSS Offers Low Pressure Molding Services with Design Support
An Ideal Protection Solution for Electronic Products
Modern electronic products require increasingly higher levels of weather resistance, waterproof and dustproof protection, and vibration resistance. This is especially important in applications such as automotive electronics, industrial control, sensors, marine and outdoor equipment, PCB protection, and circuit board encapsulation.
Traditional encapsulation methods, such as potting or high-pressure injection molding, can provide a certain level of protection. However, they often involve complex process steps, long curing times, and potential risks of damage to precision components.
Low Pressure Molding (LPM) has emerged as an effective solution. By using low-pressure processing and eco-friendly materials, LPM enables fast encapsulation while protecting precision electronic components, improving production efficiency, and supporting environmental sustainability.
COMOSS applies LPM technology to cable and electronic component encapsulation services, helping customers develop products in a more reliable, efficient, and environmentally friendly way.
Low Pressure Molding: A More Eco-Friendly Process Choice
The material used in Low Pressure Molding is commonly known as low-pressure molding material or hot-melt adhesive. It is not PVC, but a special engineering plastic based on polyamide (PA). This material offers environmentally friendly properties such as halogen-free, non-toxic, and corrosion-resistant characteristics. It also provides excellent flowability, low water absorption, superior sealing performance, and requires only low molding pressure during the process.
As the electronics market places greater emphasis on environmental sustainability, material safety, and waste management, Low Pressure Molding has become a reliable and eco-friendly encapsulation technology for electronic component encapsulation.
1. Technical Background and Advantages of Low Pressure Molding
1-1. Process Principle and Development Background
Low Pressure Molding originated in the 1970s as a solution developed to meet the automotive industry’s demand for highly protective encapsulation of precision electronic components. Unlike traditional injection molding, which requires molding materials to be injected under high pressure, Low Pressure Molding uses polyamide-based hot-melt materials to encapsulate electronic components under low pressure, enabling rapid solidification. This process can effectively prevent damage from high pressure and high heat while enhancing long-term protection and durability.
1-2. Low Pressure Molding vs. Traditional Potting Process
Compared with traditional potting, Low Pressure Molding offers faster and more efficient processing advantages:
- The process is simplified from eight steps to three steps: component insertion → molding injection → finished product testing.
- It improves production efficiency: the molding cycle takes only approximately 45-60 seconds, which is significantly shorter than the long curing time required by traditional potting.
- It reduces manufacturing costs: Low Pressure Molding allows rework, while potting is generally non-reworkable after curing. This helps reduce failure-related costs.
- It supports customized product shapes: Low Pressure Molding can be designed according to the required structure, enabling lightweight design and reducing material usage costs.
Low Pressure Molding (LPM) Processing Demo
1-3. High-standard Product Protection
Low Pressure Molding provides multiple reliability advantages:
- Waterproof and dustproof protection rated at IP67 or above
- Excellent impact resistance, vibration resistance, moisture resistance, high and low temperature resistance, and chemical resistance
- Environmentally compliant materials that are reusable, halogen-free, and non-toxic
With its excellent encapsulation performance and high reliability,
Low Pressure Molding significantly enhances the durability and safety of precision electronic products.
2. Application of Low Pressure Molding
With its high level of protection, strong customization flexibility, and low thermal impact, Low Pressure Molding has been widely adopted across various electronic product applications. The following are the key application scenarios currently supported by COMOSS services:
2-1. Sensor PCB Encapsulation and Protection
Low Pressure Molding can improve the reliability of sensors used in outdoor, in-vehicle, and specialized environments without damaging precision components. COMOSS has supported encapsulation applications, including:
- Vehicle tire pressure monitoring sensors (TPMS)
- Soil / environmental temperature and humidity sensors
- Animal physiological sensors, such as physiological measurement modules for livestock applications
2-2. Marine and Outdoor Infrastructure Equipment
Marine and outdoor environments create demanding conditions for electronic systems, including salt spray, humidity, sunlight exposure, and vibration. Low Pressure Molding helps ensure encapsulation integrity and extends product service life. COMOSS has supported customer applications, including:
- Electronic modules and sensing components for marine control systems
- Waterproof connectors and outdoor wire harness encapsulation for high-voltage power systems
2-3. PCB Encapsulation
For PCB assemblies that require overall protection, Low Pressure Molding can provide complete encapsulation without damaging onboard components, giving the product stronger waterproof, dustproof, and vibration-resistant performance. It is especially suitable for:
- Control boards for industrial control equipment
- Compact modular PCB assemblies
- Electronic units that must operate in high-humidity or high-dust environments
COMOSS can design the optimal encapsulation method according to the PCB shape, component height, and thermal sensitivity, helping customers achieve both weather resistance and long-term reliability.
2-4. Protection for Mainboards and Critical Components
In products such as home appliances, robots, and smart devices, mainboards and specific critical components are often exposed to risks such as vibration, humidity, or external mechanical interference. Low Pressure Molding can be applied for localized encapsulation or reinforcement of critical areas, improving the overall service life of the mechanical structure. Common applications include:
- Protection of vulnerable areas on robot drive boards or control boards
- Encapsulation of fragile areas such as signal terminals and interfaces on appliance mainboards
- Reinforcement of areas that require enhanced tensile strength or bending resistance
Through customized molds and application-specific problem analysis, COMOSS helps customers improve the strength and weather resistance of critical modules while reducing the risk of after-sales maintenance.
3. COMOSS LowPressure Molding Service Design Guidelines
The performance and quality of the Low Pressure Molding process depend heavily on design guidelines established through accumulated practical experience.
COMOSS has defined clear and actionable design standards for key design factors, environmental conditions, and molded objects. These guidelines help project teams and customers communicate requirements accurately while ensuring process consistency and stability.
4. Key Features of COMOSS Low Pressure Molding Services
COMOSS Low Pressure Molding services emphasize technical integration, equipment capability, and comprehensive process support, helping customers achieve greater process stability and efficiency during both development and mass production.
4-1. Sufficient Equipment Resources to Support Stable Mass Production Quality
With multiple internationally recognized Low Pressure Molding machines, COMOSS can adjust process conditions according to different product characteristics. This helps improve molding consistency and reduce mass production risks.
4-2. Integrated Connector and Mold Technologies for Tailored Encapsulation Solutions
With years of experience in connectors, cables, and mold technologies, COMOSS can support customers in:
- Mold design and fabrication
- Encapsulation design planning that better fits the product structure
- Using universal mold bases to accelerate development and reduce costs
This integrated capability helps shorten product introduction time and improve design accuracy.
4-3. One-stop Service Process to Simplify Development and Introduction Management
Through a fully vertically integrated process, COMOSS helps customers centralize development management, including:
- Product evaluation and design consultation
- Mold development
- Cable assembly and soldering
- Low Pressure Molding encapsulation
- Final testing and mass production quality management
This process helps reduce coordination costs across multiple suppliers while improving consistency and time efficiency from product development to mass production.
Conclusion
Low Pressure Molding (LPM) has become an important encapsulation technology for improving electronic product durability, shortening production cycles, and supporting environmental sustainability. With its technical foundation in cables, connectors, and precision manufacturing, as well as its equipment resources, COMOSS helps customers successfully implement LPM across various product applications, including automotive electronics, industrial control, sensors, marine and outdoor equipment, and circuit board encapsulation.
Through high-efficiency processing, eco-friendly materials, and highly reliable manufacturing, COMOSS Low Pressure Molding services provide an optimal encapsulation solution that combines quality and sustainability for waterproofing, dustproofing, and precision component protection.
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