High-Speed Jetting Valve for Hot Melt Adhesive

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High-Speed Jetting Valve for Hot Melt Adhesive | Quick-Release Design

1.3 Jetting Valve

July 21, 2025

Category Connection: Jetting Valve

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Tags:

#piezo actuator #Jetting Dispenser #piezo proportional valve

Brief: Discover the PUR Type Piezo Valve ROHS Hot Melt Glue Valve, designed for high-speed jetting of hot melt adhesive in mobile phone and mini PAD mid-frame assembly. This valve ensures precise, non-contact dispensing with quick-release design for easy maintenance.

Related Product Features:

Micro-precision control for accurate adhesive placement on narrow and complex frame structures.
Non-contact high-speed injection technology for efficient dispensing without contamination.
Special glue barrel and flow channel heating modules to maintain adhesive viscosity and prevent clogging.
Heat-resistant and wear-resistant structural design for durability under high temperatures.
Quick flow channel replacement and easy maintenance to reduce downtime.
Handles low- to medium-viscosity hot melt formulations with controlled shot volume and dot size.
Suitable for gluing mobile phone and mini PAD middle frames with tight tolerances.
Corrosion-resistant materials ensure long-term performance in demanding adhesive chemistries.

Faqs:

How does the piezoelectric valve solve the clogging problem of hot melt adhesive under high temperature?

The valve has a constant temperature design with integrated heating modules (80~200℃) to keep the glue molten, and supports quick disassembly for thermal or ultrasonic cleaning.
Can high-viscosity hot melt adhesive (such as EVA-based) be sprayed stably? How to optimize?

Yes, by reducing viscosity through heating and adjusting drive voltage waveform and injection frequency to minimize shear force influence.
Can the injection accuracy and speed of the piezoelectric valve meet the needs of high-speed production lines?

Yes, it offers 0.5nL minimum accuracy with ±2% repeatability and a maximum injection frequency of 1kHz, suitable for high-speed assembly lines.
What is the life and maintenance cost of the piezoelectric valve?

The piezoelectric stack lasts over 800 million cycles, with regular replacement of high-temperature resistant fluororubber sealing rings and impact needle nozzles every 300 million cycles.
How to be compatible with hot melt adhesives of different models/colors? Is it necessary to stop the machine for cleaning when switching?

The valve supports quick glue change with spare flow channels for quick replacement, though cleaning is required when changing glue types.