The dispensing process is not only a dispensing needle often happens, if there is not the correct mode of operation in the operation, the dispensing needle also occurs, then in the dispensing dispensing syringe precautions are those? Here by making small to about five note dispensing syringe in the application process:
1. Curing temperature curve
The general manufacturer has given the temperature curve for the curing of the glue used in the syringes. A high temperature should be used to solidify as much as possible so that the glue will have enough strength after curing.
2, the distance between the pin and the working face
Different glue dispensers are used in different glue needles, and some of the syringes have a certain stop motion. The calibration of the distance between the pin and the working face should be done before the start of each work, that is, the height of the Z axis.
There must be no bubbles in glue. A small bubble will cause many products without glue; the air in the connection should be emptied when the rubber tube is replaced every time, so as to prevent the phenomenon of empty beating.
4, glue pressure
The dispensing equipment provides a certain pressure to the needle pipe to ensure the supply of glue. The size of the pressure determines the amount of glue supply and the speed of glue outflow. The pressure is too large to cause the glue to overflow and the amount of glue is too much, and the pressure is too small will appear the intermittent phenomenon and leakage of the glue, which leads to the product defect. The pressure should be selected according to the properties of the glue and the temperature of the working environment. The high temperature of the environment will make the viscosity of the glue smaller and the fluidity better. At this time, the pressure value should be lowered, and vice versa.
5. Viscosity of glue
The viscosity of the glue directly affects the quality of the needles. When the viscosity is large, the glue point will become smaller and even wire; the viscosity is small, the glue point will become larger, and then the product can be dyed. In the process of dispensing, the proper pressure and speed of glue should be selected for the glue of different viscosity.
As long as there is a certain understanding of the five points mentioned above, it can reduce or avoid many unnecessary problems in the operation.