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The reason why the lotion pump head does not rebound after pressing down and how to check it

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, there are mainly pistons (three-piece sets), springs, and the body (the part where the springs are installed in the barrel).
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 problems 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. If it is short, it will cause the piston to return. 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 injection molding time is not handled properly, the lack of injection glue will cut off a thin layer of the body, resulting in uneven inner wall, which is inevitable during the process of piston stamping. Leave a 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.


As a famous China Customized Plastic PP Lotion Pump-SC-L002-28-410 suppliers and OEM Customized Plastic PP Lotion Pump-SC-L002-28-410 company, Ningbo Shunchuang Electron & Electrical Equipment Technology Co.,Ltd. founded in 2011, is a collection of development, production, sales in one of the comprehensive plastic packaging enterprises. Professional production of all kinds of mist sprayer, lotion pump , trigger sprayer and caps etc. In the whole production process has established a set of responsible, orderly, sustainable and effective quality management system, so that the quality of products has been fully guaranteed.