In order to avoid this kind of situation, in the production process, we should first check whether the length of the spring is standard. The difference is a thousand miles away. The effect of the length on the piston cannot be ignored. If it is short, the return stroke of the piston will not be in place. Directly cause the head to be pressed down, the rebound cannot be achieved or the rebound is slow.

Secondly, check whether the thickness of the piston fits the body. During the movement of the piston, any gaps will cause the suction force to be weak, and the body cannot be discharged by pressing the head. Due to the thermal expansion and contraction of plastics, a normal piston is very important to ensure the quality of the emulsion pump.

Finally, let’s analyze the body. In view of the plastic’s scalability characteristics, if the injection is not performed properly during injection molding, insufficient injection will cut off a thin layer of the body, resulting in uneven inner wall and inevitably leaving behind during the piston stamping process. The gap makes it impossible to discharge the material.

When using it, we first push to discharge the air in the reservoir (that is, the plastic tube that can absorb the shampoo). When the air is exhausted, press the pump head again. After letting go, the spring in the pump head To restore the original state, a vacuum will be formed in the liquid storage chamber and negative pressure will be generated. At this time, the pressure in the container is consistent with the atmospheric pressure. Then, the pressure in the liquid storage chamber is low and the pressure in the container is high. , Due to the pressure difference, the atmosphere will press the liquid around the mouth of the liquid storage cavity into the liquid storage cavity, giving people the feeling that the pump head sucks up the liquid.