Introduction to Plastic Molding Processing Technology
Small, thin, and lightweight! Challenging the production of a mobile antenna using a plastic molded composite integrated design!
This is an introduction to a case where "hot melt molding technology" was adopted to achieve the miniaturization of portable antennas for PCs equipped with digital TV tuners. To miniaturize the antenna, it was essential to fold the antenna in half. To achieve this, it was necessary to mold it as a single unit, including the hinge. What made this possible was a method using hot melt resin that can be molded at ultra-low pressure, which is still not widely used in Japan. By combining three types of molding technologies—gas assist, carbon dioxide, and hot melt—we successfully shaped a folded antenna through integrated molding without using a single screw. 【Benefits of Implementation】 ■ Reduction of subsequent processes through integrated molding ■ Good results in environmental testing (thermal shock testing machine) *For more details, please refer to the catalog or feel free to contact us.
basic information
【Overview】 ■ Conducted carbon dioxide gas molding using a mold modified with additional gates to prevent underfilling. ■ Performed insert molding for carbon dioxide gas molding with an antenna substrate and hinge connected to the hollow case obtained from gas-assisted molding. ■ Successfully protected the exposed hinge with hot melt resin. ■ The hot melt molding material has excellent adhesion to various plastics, allowing for composite molding without any abnormalities such as peeling. *For more details, please refer to the catalog or feel free to contact us.
Price range
Delivery Time
Model number/Brand name
Low Pressure Molding, Hot Melt Molding, Waterproof and Dustproof, Encapsulation Molding
Applications/Examples of results
For more details, please refer to the catalog or feel free to contact us.
Detailed information
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Example of waterproof sealing for agricultural machinery circuit boards. The left photo shows before sealing, and the right photo shows after sealing (the black part is the hot melt molded section).
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Example 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).
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Example of waterproof sealing for motor stators. The amber-colored areas around the circuit board and coils in the photo are hot melt molded sections.
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