High Temperature Operation Piezo Jet Valve with High Jetting Accuracy and Corrosion Resistance for Hot Melt Adhesive Dispensing

High performance Piezo Jet Valve in Speaker Hot Melt Adhesive Dispensing applications

Piezo jet valves are increasingly used in the precision dispensing of hot melt adhesives in speaker manufacturing, particularly for compact and high-performance devices such as smartphone speakers, TWS (true wireless stereo) earbuds, and smart speaker modules. These valves offer non-contact, high-speed jetting capabilities that are ideal for applying micro-doses of high-viscosity hot melt adhesives to small, complex components with tight tolerances.

In speaker assembly, piezo jet valves are commonly used to bond the diaphragm to the frame, seal acoustic chambers, fix magnetic components, or secure dust caps and covers. The non-contact dispensing method avoids damaging fragile structures like the diaphragm or coil, while ensuring uniform glue distribution and avoiding overflow, which is critical for maintaining acoustic performance and visual cleanliness.

One of the key advantages of piezo valves in hot melt adhesive applications is their ability to maintain consistent dot size and volume, even at high viscosities (20,000–50,000 mPa·s) and elevated temperatures (typically 160–180°C). With integrated heating modules for both the valve body and the adhesive reservoir, systems like Mingseal’s hot melt piezo jet valve KPS2000-R ensure thermal stability and long open time, preventing premature solidification and maximizing production uptime.

Core Advantages

• High viscosity hot melt adhesive compatibility
• Supports high temperature operation
• High jetting accuracy
• Module design, easy for operation

Main appliaction

• Bonding of the diaphragm and the bracket

  
  

• Sealing and waterproofing of the vibration system

  
  

• Bonding of the cover or magnetic circuit

Technical parameters

FAQ

Q1: Can the piezo jet valve handle high-viscosity hot melt adhesives used in speaker assembly?
A1: Yes. Piezo jet valves are engineered to dispense hot melt adhesives with viscosities up to 50,000 mPa·s. Equipped with heating modules for the valve and tank, they maintain consistent temperature and flow, ensuring stable jetting performance during speaker diaphragm or frame bonding.

Q2: How does the valve prevent overflow or glue defects on small speaker components?
A2: With non-contact, micro-precision dispensing, piezo valves ensure uniform dot size and placement even in narrow bonding areas. This minimizes glue overflow and improves cosmetic appearance and acoustic reliability in TWS and smartphone speaker modules.

Q3: How is nozzle condition maintained during continuous high-speed operation?
A3: The valve includes heating and sealing components to prevent clogging and carbonization. Routine cleaning is simple, and the design minimizes nozzle wear, ensuring stable performance for long production runs.

About Mingseal

Founded in 2008, Changzhou Mingseal Robot Technology Co., Ltd. is a technology-driven manufacturer of high-end equipment, specializing in connection, assembly, inspection systems, and key components for advanced semiconductor packaging and precision electronics. Our solutions are widely adopted by leading customers in sectors such as semiconductor packaging, consumer electronics, and automotive electronics. With a strong presence across Asia and the Americas, we deliver reliable support and innovation globally.

Partner with Mingseal to power the future of automatic manufacturing!

Established in 2008, Changzhou Mingseal Robot Technology Co., Ltd. (hereinafter referred to as “Mingseal Technology”) is a technology-driven high-end equipment manufacturing enterprise committed to providing connection and assembly equipment, key core components, and customized technology solutions for industry-leading customers in the fields of semiconductor packaging & testing and precision electronic manufacturing, jointly promoting industry technique and technology progress.

Mingseal Technology specializes in the development and production of high-precision dispensing machines, which are widely used in advanced semiconductor packaging, consumer electronics, and automotive electronics manufacturing. Our dispensing systems feature visual control, multi-axis motion, and adaptable configurations, enabling consistent and efficient material application in complex processes.

Our products are trusted by top-tier customers across industries, and our business and technical support network spans China, Japan, South Korea, Vietnam, Singapore, India, Thailand, Malaysia, and Mexico.

Mingseal Technology has received multiple national honors and qualifications, including National High-Tech Enterprise, National Intellectual Property Demonstration Enterprise, and National “Specialized, Fined, Peculiar and Innovative” Small Giant Enterprise. In the era of intelligence and digitalization, we will continue to invest in technological R&D, uphold values of cooperation and sharing, and work closely with customers, suppliers, employees, and partners to advance high-end intelligent manufacturing.