Today we are going to discuss the needle of the glue dispenser. First of all, we need to understand the factors that will affect the quality of the glue dispenser. Friends who have been engaged in the dispensing machine industry should know: Dispensing machine barrels of the given pressure glue, glue barrel or the size of the rubber valve needle, needle distance to the product working face, and then glue viscosity, the temperature of the homework, glue the bubble processing, etc. All of these factors influence the dispensing process, and these factors are strongly associated with the needle, good or bad, a product of technology so rubber valve needles of the effect is very obvious. How to choose the needle? Let's analyze it from the following points.

First, the type of glue valve needle of the glue dispenser:

1. Teflon needles are characterized by: relatively prominent control of liquid with strong fluidity;

2. Oblique plastic needle, its characteristics are: can be used for large flow demand products or high viscosity fluid, can effectively resist UV light;

3. Straight stainless steel needle with plastic seat, which is characterized by excellent continuous dispensing effect;

4. All steel needle

5. Flexible needle, which is characterized by: can go deep into the non-linear working face, protect the product surface;

6. Stainless steel needle with plastic base

Two, according to the use of products on the glue process to decide:

1. Strong liquid fluidity: use small type of dispensing needle, small pressure setting;

2. Weak liquid fluidity: the use of oblique plastic needle, large pressure setting;

3. The product needs to play a small point: use a small needle, the pressure is not too large, the dispensing time is short;

4. The product needs to be bigger: use large needles, set higher pressure, long dispensing time.

Three, according to the characteristics of the glue to decide which needle to use:

UV glue: oblique needle, effectively resist UV to prevent curing;

Instant glue: oblique plastic needle can be used, PP needle can also be used;

Anaerobic glue: the use of plastic steel needle;

Light curing adhesive: all steel needle head;

Sealant and paste fluid: the use of oblique plastic needle;

Usually, after we determine the good use of the glue dispenser, glue valve and glue, we choose the needle to determine the process effect of the glue. So we now look at the selection of needles is very important, it can directly affect the overall dispensing quality.