Precision machining of microholes of 0.1mm for dispensing machines using tungsten carbide nozzles. Custom production of tungsten carbide dispensing nozzles with a diameter of φ0.1mm for dispensing machines. Tungsten carbide is embedded in high-speed steel nozzles for customization.

A dispensing machine is a widely used mechanical device in the electronics industry that controls fluids and automatically dispenses or coats them onto product surfaces or interiors. It can achieve three-dimensional and four-dimensional dispensing paths, precise positioning, and accurate adhesive control. Its working principle involves compressed air being sent to the dispensing valve, which then pushes the adhesive into the feed tube connected to the piston chamber. When the piston is in the upstroke position, the chamber is filled with adhesive. As the piston advances downward, the adhesive is dispensed through the tungsten carbide nozzle, in conjunction with a carbide needle. The carbide nozzle is a crucial component that controls the flow rate of the fluid by controlling the nozzle aperture, enabling precise control.

The 0.1mm microhole tungsten carbide nozzle used on the dispensing machine is suitable for various operations on automated dispensing machines, such as dispensing, spraying adhesive, conducting silver paste, LED phosphor, IC packaging, bottom filling adhesive, UV adhesive, sealing adhesive, epoxy adhesive, surface coating adhesive, and solder paste adhesive. The high-temperature resistance of tungsten carbide allows it to serve as a carrier for the aforementioned fluid media. With the widespread use of electronic adhesives, the application of dispensing equipment has become more extensive and diversified. This places higher demands on dispensing nozzles, leading to the increased complexity and higher precision requirements of tungsten carbide nozzles.

The 0.1mm microhole tungsten carbide nozzle is custom-made based on customer-provided drawings. It has a tolerance requirement of ±0.002 for the small hole size of tungsten carbide nozzles, and it is slender in length. All surfaces have a smoothness of Ra0.2, and the concentricity between the inner hole and the outer shape is within 0.005. The diameter section is free from any collision or missing corners. The nozzle part is pressed and embedded into the bottom base using a hydraulic press.