The Working Principle of Stainless Steel Dispensing Needles

In modern industrial production, from precision electronics manufacturing to large-scale automotive parts assembly, dispensing process is ubiquitous. And stainless steel dispensing needles, as the key performer in the dispensing process, although small in stature, but contains a subtle working principle, supporting the high quality production of many industries.

Structural composition and basic characteristics

Stainless steel dispensing needles are mainly composed of needle tip, needle tube and connecting parts. The tip of the needle is the “pioneer” of the entire dispensing needle, which is treated with a special processing technology, exceptionally sharp and razor-sharp. This characteristic makes it easy to penetrate the surface of various materials, whether it is a tiny gap in the electronic components, or the sealing interface of automotive parts. The needle tube is the glue “transportation channel”, it is generally made of stainless steel, this material has excellent corrosion resistance and chemical stability, can resist the erosion of all kinds of glue chemicals, to ensure that in the long-term use of the process, will not be due to the material reacts with the glue and affects the quality of dispensing. Connection part of the role of the needle and dispensing equipment closely linked to ensure that in the process of dispensing, the needle can work stably, and glue can be smoothly transferred from the equipment to the needle tube.

The connection and glue supply link

In practice, stainless steel dispensing needles should first be connected through the connection part of the dispensing equipment (such as dispensing machines) accurate docking. Dispensing equipment has a special container for storing glue. When the dispensing operation starts, the power system of the dispensing equipment begins to play a role. Common power systems include pneumatic pumps and screw pumps. Take the pneumatic pump as an example, it will apply a certain pressure to the storage of glue containers, driven by the pressure, the glue is like being given “power”, began to flow from the container, along the connecting pipeline, in an orderly manner into the stainless steel dispensing needles inside the syringe . This is like opening a “high-speed channel” to the target location for the glue, ready for the subsequent accurate dispensing.

The delivery of glue and precise control

When the glue enters the syringe, the dispensing equipment will be through a variety of ways to accurately control the flow of glue in the syringe. For example, for pneumatic dispenser, it can adjust the size of the air pressure to control the flow and speed of dispensing. When a small amount of precise dispensing is required, the equipment will reduce the air pressure, making the flow rate of glue in the syringe slow down, and the amount of glue flowing out will be reduced accordingly; and when a larger area is required to be coated with glue, the air pressure will be increased appropriately to speed up the flow rate and flow of glue. Another common type of screw pump dispenser utilizes the rotation of the screw to push the glue. By precisely controlling the rotational speed of the screw, the amount of glue dispensed can be precisely controlled. For example, in the electronic chip packaging dispensing process, the need for extremely small and accurate amount of glue, this time the screw pump will run at a lower speed, to ensure that each time the amount of glue extruded to meet the high precision requirements of chip packaging.