Causes and Solutions for Lotion Pump Heads Not Springing Back After Pressing
Spring Issues: Malfunction of the Core "Power Source" for Springback
The spring is the core component that enables the lotion pump to spring back, equivalent to the "power heart" of the pump head. Long-term high-frequency pressing or pressing too hard may cause metal fatigue of the spring, resulting in deformation and loss of elasticity; in severe cases, the spring may even break directly, completely losing the ability to push the pump head back to its original position. In addition, plastic debris remaining during the production of the lotion pump, dust and impurities infiltrating during use, or lumps formed after the lotion dries may get stuck in the spring, preventing it from expanding and contracting freely; when used or stored in a humid environment, the spring may also rust, further hindering its normal operation.
Internal Blockage: Blocked Channels Hinder Springback
Impurities and sediments in the lotion, or dry lumps of lotion remaining inside the pump head after long-term non-use, may block key parts such as the liquid outlet channel and piston gap of the pump head. When these channels are blocked, the movement of the pump head when pressed down and sprung back will be significantly resisted, not only causing the problem of not springing back but also often accompanied by poor liquid discharge and inconsistent liquid output. Especially for thick-textured creams, body lotions, or exfoliating skincare products containing granular ingredients, such blockage problems are more likely to occur.
Poor Coordination Between Pump Head and Pump Body: Structural Loosening or Aging
The bayonet and buckle design between the pump head and the pump body are crucial to ensuring a tight fit between the two. If the mold precision is insufficient during production, resulting in excessive dimensional tolerance, or the buckle design is unreasonable, the pump head will not be firmly installed after installation, and it is prone to loosening and displacement during use, thereby failing to spring back normally. In addition, most lotion pumps are made of plastic materials. Long-term exposure to direct sunlight, high-temperature environments, or frequent contact with acid-base skincare products will accelerate material aging and deformation, leading to a decrease in the coordination precision between the pump head and the pump body, and also causing springback failures.
Air Pressure Balance Issue: The "Invisible Key" to Pump Head Operation
Regardless of the type of pump for lotion, its normal operation is inseparable from the principle of air pressure balance. The top of the pump head is usually designed with a tiny air vent. When pressed, the air inside the pump is discharged through the air vent, and the lotion is pressed out; when released, external air enters the bottle through the air vent to maintain air pressure balance inside the bottle, thereby pushing the pump head to spring back. If the air vent is blocked by dust or lotion residues, or the pump head leaks air due to poor sealing, the air pressure inside the bottle cannot be balanced normally, and the pump head will naturally be difficult to spring back smoothly after pressing. This situation is particularly common in products that have not been used for a long time, stored upside down, or whose pump heads are pressed during transportation.
Impact of External Factors: Improper Transportation and Storage or Environmental Erosion
Lotion pumps are precision small parts. Severe impact or extrusion during transportation can easily cause displacement of internal springs, deformation of pistons, or breakage of buckles, directly resulting in abnormal springback. The storage environment is also crucial. High-temperature environments will accelerate the aging and softening of plastic parts, while humid environments are prone to spring rust and mold growth on parts, which will affect the performance and service life of the lotion pump. In addition, improper use habits such as frequent dropping and rough pressing will also aggravate the damage to the pump head.
If you encounter the problem of the lotion pump head not springing back, you can try these solutions first: Step 1, unscrew the pump head, check for obvious impurities or lumps blocking the channel, rinse the inside of the pump head with warm water, dry it, and reinstall it; Step 2, gently shake the bottle body to observe if the spring is stuck, and try to gently toggle the spring to reset it; Step 3, check if the air vent is blocked, and gently unclog it with a thin needle (be careful with the force during operation to avoid damaging the pump head). If the problem persists after these treatments, it is likely that the internal components are damaged. It is recommended to contact the brand customer service for replacement or directly replace with a new lotion pump.
As a reliable lotion dispenser pump manufacturer, lotion pump supplier, plastic lotion pump supplier, plastic lotion pump suppliers, lotion dispenser pump supplier, Guangdong Hongyuan focuses on producing high-quality lotion pump products. From spring material selection, mold precision to air pressure balance design, every link is strictly controlled to minimize springback failures. If you need to wholesale lotion pumps, please feel free to contact us!
