How to Improve Your Dispensing Technology

Dispenser can enhance the productivity, lower the waste, and save the glue. But some factories lack the knowledge of dispensing and don’t get any training from the dispenser producer. In such cases, they often have problems using dispenser, such as: A: drawing or dripping; B: un-uniform of deposits; C: glue has no stickiness; D: the strength glue doesn’t reach the requirement. E: bubbles in the glue. Before you buy or use dispensers you should consider the following questions first.
1、The glue components: the most widely used glues are: epoxy resin, UV glue，silica glue, anaerobic glue and instant glue. If AB two components are mixed, the proportion should be a consideration.
2、Mobility and viscosity of glue: The mobility lower, the viscosity is higher.
3、Pressure of dispensing. The pressure determines the amount of glue supply and the glue flow velocity. The more of the viscosity, the more pressure it is required. The pressure should be chosen accord to the nature of the glue, the working temperature, and the amount of dispensing. High temperature can make the glue has lower viscosity, then the pressure should be lower, and vice versa.
4、Size and type of needles: The size of needles can affect the dispensing precision. As the air pressure is consistent, the bigger of the needle, the larger of the deposit. Needle should be chosen according to the product. Usually, when the inner diameter of the needle is about 1/2 of the point, the effect is the best.
5、Size of deposit. The size of deposit is determined by the time dispensing. According to our experience, the longer of the time, the larger the deposit is. The diameter of the deposit should be 1/2 of the interval, so there are enough glue to keep the components bonded, and no waste of the glue.
6、Vacuum suck back value. The vacuum suck back function is used to prevent the glue from dripping. Set the vacuum suck back value properly can control the phenomenon of dripping and drawling.
7、Condensation temperature curve. Most of the glue manufactory has given the condensation temperature curve. Usually glue can be condensation at room temperature. In practical, higher temperature should be used to give the glue enough strength and hardness.
8、Bubbles. Bubbles should not be present. They can cause a lot of bad effects. The glue can only be used after the bubble been exhausted to prevent empty dispensing.

amount of dispensing. High temperature can make the glue has lower viscosity, then the pressure should be lower, and vice versa.
4、Size and type of needles: The size of needles can affect the dispensing precision. As the air pressure is consistent, the bigger of the needle, the larger of the deposit. Needle should be chosen according to the product. Usually, when the inner diameter of the needle is about 1/2 of the point, the effect is the best.
5、Size of deposit. The size of deposit is determined by the time dispensing. According to our experience, the longer of the time, the larger the deposit is. The diameter of the deposit should be 1/2 of the interval, so there are enough glue to keep the components bonded, and no waste of the glue.
6、Vacuum suck back value. The vacuum suck back function is used to prevent the glue from dripping. Set the vacuum suck back value properly can control the phenomenon of dripping and drawling.
7、Condensation temperature curve. Most of the glue manufactory has given the condensation temperature curve. Usually glue can be condensation at room temperature. In practical, higher temperature should be used to give the glue enough strength and hardness.
8、Bubbles. Bubbles should not be present. They can cause a lot of bad effects. The glue can only be used after the bubble been exhausted to prevent empty dispensing.

amount of dispensing. High temperature can make the glue has lower viscosity, then the   pressure should be lower, and vice versa.
Size and type of needles: The size of needles can affect the dispensing precision. As the air pressure is consistent, the bigger of the needle, the larger of the deposit. Needle should be chosen according to the product. Usually, when the inner diameter of the needle is about 1/2 of the point, the effect is the best.
Size of deposit. The size of deposit is determined by the time dispensing. According to our experience, the longer of the time, the larger the deposit is. The diameter of the deposit should be 1/2 of the interval, so there are enough glue to keep the components bonded, and no waste of the glue.
Vacuum suck back value. The vacuum suck back function is used to prevent the glue from dripping. Set the vacuum suck back value properly can control the phenomenon of dripping and drawling.
Condensation temperature curve. Most of the glue manufactory has given the condensation temperature curve. Usually glue can be condensation at room temperature. In practical, higher temperature should be used to give the glue enough strength and hardness.
8、Bubbles. Bubbles should not be present. They can cause a lot of bad effects. The glue can only be used after the bubble been exhausted to prevent empty dispensing.