The reason why the lotion pump head can't spring back and the inspection method

Update:Mar 04,2022

Summary:The lotion pump head is integrated by different plastic components and accessories. This article focuses on the reasons why the head cannot rebo...

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

This article focuses on the reasons why the head cannot rebound or the rebound is slow after pressing and how to check it.

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

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

Any non-cooperation between the two will lead to the serious problem pointed out in this article that the 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 should first check whether the length of the spring is standard, the difference is a thousand miles away, and the effect of the length on the piston cannot be ignored. When it is in place, it will not be able to rebound or the rebound will be slow after the pressing head is directly pressed down.

Secondly, check whether the thickness of the piston fits the body. During the movement of the piston, any trace of open space will cause inspiratory insufficiency, and press the head to press the material body. Because plastics have the properties of thermal expansion and contraction, a normal piston is appropriately important to ensure the quality of the lotion pump head.

Finally, let's analyze the body. In view of the elastic properties of plastics, if the operation is not done properly during the injection molding time, the lack of injection glue will cut off a thin layer of the body, resulting in uneven inner wall, which cannot be prevented during the piston stamping process. Under the gap, so that the material cannot be discharged.

After the analysis of the above 3 components, it is impossible to press, or the appearance that the pressing head cannot bounce after pressing can actually be prevented.

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

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