28mm Plastic Foam Dispenser Pump with Special Nozzle and 100ml Capacity for Customized Skincare Applications

Components and How It Works (The Mechanics)

The magic of a foam pump lies in its internal mechanism, which is more complex than a standard trigger sprayer.

1. Actuator / Nozzle: The part you press down on. It contains a fine mesh screen.

2. Pump Chamber: Draws the liquid up from the bottle.

3. Liquid Piston: Draws a precise amount of liquid from the bottle.

4. Air Intake Valve / Air Piston: Draws air into the system.

5. Mixing Chamber: Where the liquid and air are combined.

6. Foaming Mesh / Screen: A fine sieve made of metal or plastic. This is the key component that creates the foam by breaking the air-liquid mixture into tiny, uniform bubbles.

7. Dip Tube: Reaches to the bottom of the bottle.

8. ** Closure:** The screw-on cap.

The Foam-Making Process in 4 Steps:

1. Downstroke (Press): When you press the actuator down, two things happen simultaneously:

   • The liquid piston draws a precise, small amount of liquid up from the bottle.

   • The air piston draws a large volume of air into the mixing chamber.

2. Mixing: The liquid and air are forced together into the mixing chamber, creating a turbulent, pre-foamed mixture.

3. Foaming: This air-liquid mixture is then forced under pressure through the fine mesh screen. The screen shears the mixture, creating a consistent, stable foam.

4. Upstroke (Release): When you release the actuator, springs return the pistons to their starting position, readying the pump for the next dose.