How is the glue ratio of automatic glue filling machine controlled?

Automatic glue filling machine is widely used in modern industry. The application fields include automobile industry, led lamp industry, electrical appliance industry, electronics industry, etc. The glue glue has ab glue, polyurethane, silica gel, potting glue, etc. The main glue is double For the components, before filling the glue, it is necessary to mix the two components of a glue and b glue, how to control the ratio of glue, Xiaobian now explain for you one by one.

The metering pump is generally used to control the ratio of the two-component ab glue. The metering pump is generally divided into a screw pump and a gear pump. The gear pump relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport or increase the liquid. Pressurized rotary pump. The two gears, the pump body and the front and rear covers form two closed spaces. When the gear rotates, the volume of the space on the disengagement side of the gear increases from small to large, forming a vacuum, sucking the liquid, and the volume of the space on the gear meshing side changes from large to large. Small, and the liquid is squeezed into the pipeline. The suction chamber and the discharge chamber are separated by the meshing lines of the two gears. The pressure at the discharge port of the gear pump is completely dependent on the resistance at the pump outlet. Gear pumps are generally used for a little bit of glue and a higher concentration screw pump.

The screw pump is a positive displacement rotor pump, which is mainly a rotary pump that relies on the volume change and movement of the mesh space formed between the pump body and the screw to transport or pressurize the liquid, as can be seen from the above figure. The screw pump is divided into a single screw pump, a twin screw pump and a three screw pump according to the number of screws. When the driving screw rotates, the driven screw that meshes with it is rotated together, and the screw meshing space volume at one end of the suction chamber is gradually increased, and the pressure is lowered. The liquid enters the volume of the meshing space under the pressure difference. When the volume is increased to a maximum to form a sealed chamber, the liquid is continuously moved axially in the sealed chambers until one end of the chamber. At this time, the volume of the screw meshing space at one end of the discharge chamber is gradually reduced, and the liquid is discharged. The working principle of the screw pump is similar to that of a gear pump, except that the gear is replaced by a screw in the structure. The pump has a single suction type and a double suction type, but the single screw pump has only a single suction type. The pump must be equipped with a safety valve (the single-screw pump does not have to be equipped with a belt) to prevent damage to the pump or prime mover due to some reason such as the clogging of the discharge pipe causing the pump outlet pressure to exceed the allowable value.

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