If the base serves as the anchor point, the needle tip is the writing brush tip. Its function is to precisely guide and distribute fluids. The unique dual‑orifice design of the V3 needle imposes ultra‑stringent requirements on tip forming accuracy: the two micro‑holes must be perfectly symmetrical in position, highly consistent in bore diameter, with mirror‑smooth inner walls, while the overall taper of the tip must be uniform and seamless. Conventional drilling or cutting processes tend to produce burrs, deformation and rough inner walls. Manufacturers therefore adopt rotary swaging.

This is a near‑artistic metal plastic forming process. A precision‑machined 304 stainless steel tube is placed into high‑speed rotating split dies with custom‑shaped cavities. As the dies spin, they deliver continuous, high‑frequency radial forging impacts on the tube. No metal chips are generated in this process. Subjected to powerful triaxial compressive stress, the metal material "flows" and redistributes to match the die cavity. The outer diameter gradually reduces, wall thickness is precisely controlled, and a tapered tip is ultimately formed. Its refinements lie in three aspects:

Continuous material grain flow: Cold forging drives metal grains to flow and refine along the deformation direction, enhancing component strength and toughness far better than cutting processes that sever grain structures.

Exceptional dimensional consistency: The die defines the final shape. With uniform tube blanks, dimensional variations among thousands of needle tips can be controlled at the micrometer level, laying a foundation for stable mass production.

Superior inner‑wall quality: Under optimized process parameters, the inner wall forms with mandrel support, achieving near‑mirror finishes and providing nearly resistance‑free channels for fluid flow.

Merging Two into One: Nanoscale Fusion via Laser Welding

The precision‑machined base and needle tip need to be joined as a single unit. Heat input from any conventional welding method would undo all prior micrometer‑level precision efforts. Laser welding stands as the optimal choice due to its high energy density, low heat input and minimal deformation. A focused beam of ultra‑high‑energy laser locally melts and solidifies the joint interface of the two components in milliseconds. Its heat‑affected zone spans merely tens to hundreds of micrometers, exerting negligible impact on the precision of base threads and tip dual orifices. This "cold‑welding" effect bonds two separately manufactured precision components as if integrally formed, ensuring overall rigidity, tightness and coaxiality from the joint interface to the terminal flow channel.

Essentially, the precision manufacturing philosophy of V3 Infusion Needle manufacturers represents an ultimate pursuit of certainty. They establish rigid, repeatable mounting benchmarks at the macro scale through Swiss‑type turning; shape function‑oriented fluid terminals at the mesoscale via rotary swaging; and achieve perfect integration of the two at the microscale using laser welding. This complete process chain transforms precision from numerical values on drawings into mass‑producible, inspectable and reliable physical entities. For end‑users, this means flavor dosage in every bottle of essence and every packaged product approaches the preset value infinitely, drastically elevating the sigma level of production parameters. In modern industry pursuing extreme consistency, absolute mastery over the micrometer world delivers manufacturers' core value to customers: minimizing production uncertainty to an infinitely low level.