Reasons why the lotion pump head cannot rebound after pressing it and how to check it

The lotion pump head is integrated by different plastic components and accessories.

 

This article focuses on the reasons and checking methods for the reason why the head does not rebound or rebounds slowly after pressing.

 

Among the lotion pump head components and accessories, the most important ones are the piston (three-piece set), spring, body (the part of the barrel with the spring) and so on.

The piston, relying on the elasticity of the spring, continuously performs strokes in the body to pull the material out of the bottle.

 

The lack of cooperation between any part will lead to the serious problems pointed out in this article, that the press head cannot rebound or the material cannot be discharged after pressing.

 

In order to prevent this kind of situation from happening, in the production process, we first probably check whether the length of the spring is standard or not. The difference between the length and the length of the piston cannot be ignored. If it is too short, it will cause the piston to return incorrectly. When it is in place, it will not rebound or rebound slowly after pressing the head directly.

 

Secondly, check whether the thickness of the piston fits the body. During the movement of the piston, any gap will cause inability to inhale, and the discharge body cannot be pressed by pressing the head. Because plastic has the property of thermal expansion and cold contraction, a normal piston is very important to ensure the quality of the lotion pump head.

 

Finally, let’s analyze the body. In view of the elastic properties of the plastic, if the injection is not done properly, a thin layer of the body will be cut off if the injection is insufficient, resulting in uneven inner walls. Lower the gap, so that the material cannot be discharged.

 

Through the analysis of the above three components, it is actually possible to avoid the phenomenon that the button cannot be pressed, or the button cannot bounce up after being pressed.

 

We need careful inspection and persistent testing to ensure the normal use of each set of products for customers.