How to choose and apply the right syringe for your fluid dispensing system
Syringes are widely used as containers in fluid dispensing systems. It could be either used together with a dispensing valve or simply connected with a needle when high accuracy is not necessary. Compared to big and expensive pressure barrels, syringes are cost effective and end easy to use. If your application doesn't involve a big amount of glue, dispensing with syringes is probably the way to go. However, choosing the right syringe may not be an easy task. Besides the basic volume which usually ranges from 5cc ~70cc, you also need to consider the colors, materials, and types. And all these factors should fit your actual applications as well as the glue types you are using. In this article, I will go through all of these one by one and give you some tips when applying syringes in glue dispensing systems.
Decide the size that lasts an entire shift
When choosing your syringe barrel, consider how much fluid you'll be dispensing. The standard volume of the syringes ranges from 3cc to 70cc. The principle is that it should last your operator for an entire shift. This will save you time and energy by not having to exchange out the barrel during a shift, which might slow production and productivity.
Use the Conical Type for high viscosity adhesives
There are two main shapes of dispensing syringes: flat head and conical head. The main difference between them is the conical syringe works better with high viscosity adhesives as the Streamlined shape helps the glue to flow. On the other hand, the flat syringes is a more economical solution when you are not applying high viscosity materials.
Color options for syringe barrels
There are 3 main colors of dispensing syringe barrels: transparent, amber, and black. Each color has its unique features. Choosing the appropriate color of the syringe barrel minimizes waste and maintains production efficiency.
Transparent: The transparent/clear syringe barrels are suitable for a wide range of fluids and can be used in most circumstances. The clarity of the barrels makes it simple to check fluid levels and look for air bubbles.
Amber: UV-cure materials require amber barrels for the most efficient results. These syringes filter UV and visible light rays with a maximum transmission of less than 12% in visible light below 550 nm. They are also clear enough to see the levels of liquid.
Black: The black barrels offer full light blocking for light-sensitive materials, but the level of the material may be difficult to see.
Selecting the right material
Dispensing syringe barrels are made of different materials depending on the application. 2 of the most common materials used are: PP and PE. PP is more heat resistant, and PE is more flexible.
PP: lightweight, durable plastic that is resistant to both high and low temperatures.It makes the syringe not easy to break, and can match many kinds of dispensing needles. It is commonly used.
PE: A lightweight plastic that is resistant to chemicals and solvents. It is more flexible and impact resistant than PP, but it is not as high-temperature resistant as PP.
2K syringe barrel for 2K dispensing application
When you're dispensing two distinct components materials that each need 2K syringes, a single barrel isn't sufficient. The 2K syringe is a mixing syringe capable of combining two distinct types of glue. The form and structure of the 2K syringe are comparable to those of the 1K syringe, however it has two barrels.
According to the required mixing ratio of the applied adhesives, 2K syringes are available in a different specifications like 1:1, 2:1, 4:1, 10:1, etc.
After you've learned how to pick out a dispensing syringe, the next step is to use it. Understanding the product's structure may assist you in applying the syringe. A complete syringe consists of a plunger, an adapter, a needle bayonet and a barrel.
The plunger of the dispensing syringe is at one end and a pinched needle at the other. The pipe is connected to the syringe via the adapter, and the needle bayonet connects the needle to the syringe. To remove glue from the syringe, press down on the plunger, and apply it to a surface.
The adapter: buckles and threads are available for different sizes. A buckle type adaptor is suitable for 55CC and under, while a thread type adaptor is required for 100CC and above. A sealing ring is provided to ensure a tight fit without leaking.
Plunger: The appropriate piston ensures no air appears during dispensing and that no air bubbles form. Plungers are available in a variety of sizes, just like adapters. According to the head shape, plunger could be flat or conical.
Tips when applying dispensing syringes
Conclusion
Syringes are widely used in fluid dispensing systems for their cost-effectiveness and easy use. There are many different types of syringes, each with its own advantages and disadvantages depending on the application. When choosing a syringe, you must consider the volume, color, material, and type of syringe. All of these variables should be relevant to your real-world applications as well as the adhesives you're utilizing. When you need more information about this, feel free to contact me via [email protected].