The Importance of The Needle Tip in The Dispensing Process

Decide the precision of dispensing

Accurate control of the size of the glue spot: the inner diameter size of the needle tip is directly related to the size of the glue spot. For example, when dispensing electronic chip package, the very small inner diameter of the needle tip can ensure the precise dispensing of micro glue, forming a small and uniform glue spot to meet the needs of chip precision connection; the large inner diameter of the needle tip is suitable for occasions that require a larger glue spot, such as automotive interior parts of a large area of the bonding.

Accurate dispensing position: The shape and processing accuracy of the needle tip affects the accuracy of the dispensing position. Sharp and well-processed needle tip, can be accurately positioned in the target point, to avoid dispensing offset, such as circuit board components pin dispensing, to ensure that the glue falls accurately on the pins rather than other parts of the guarantee of stable electrical performance.

The influence of glue outflow characteristics

Flow and flow rate control: the inner diameter and shape of the tip of the needle determines the flow and flow rate of glue. Large inner diameter, glue flow, fast flow rate, suitable for low-viscosity glue fast coating; small inner diameter, small flow, slow flow rate, conducive to fine control of high-viscosity glue. Special shapes of needle tip (such as conical tip) can change the glue flow path and speed, to adapt to different process requirements.

Prevent pulling and trailing: smooth, well-designed needle tip can reduce the adhesion of glue and needle tip to avoid glue pulling and trailing phenomenon after the end of dispensing. In the optical device dispensing, if there is pulling and dragging will affect the optical performance, high quality needle tip can ensure that the dispensing edge is neat and smooth.

About production efficiency and cost

Avoid clogging to improve efficiency: the right needle tip can reduce the glue clogging. When the inner diameter of the needle tip and the characteristics of the glue (such as filler, particle size) match, the glue flows smoothly, reducing the frequency of stopping to clean up due to clogging, and improve production efficiency. If the glue contains fillers, choose a needle tip with a large enough inner diameter to prevent the filler particles from clogging.

Durability to reduce costs: good quality, excellent material tip durability, not easy to wear and deformation, reduce the frequency of replacement, reduce the cost of consumables. Especially in large-scale continuous production, frequent replacement of the needle tip is not only time-consuming, but also increase costs, durable needle tip can ensure stable production.

Adapt to different glues and processes

Match the characteristics of glue: different glues need different needle tip to match. For example, instant glue is easy to react with metal, need special material lining tip; UV glue is sensitive to ultraviolet rays, need to use ultraviolet shielding tip; high-viscosity sealant needs a large inner diameter or special shape tip to ensure smooth extrusion.

Meet diversified process requirements: In complex dispensing processes, such as complex dispensing paths, different glue volume distribution, etc., the tip can be customized. For example, 3C product shell dispensing sealant may need special angle tip or combination tip to realize precise dispensing of specific trajectory and amount of adhesive.