Which type of spray gun utilizes a siphon mechanism for applying resin?

The siphon cup spray gun is designed specifically to use a siphon mechanism for applying materials such as resin. This type of spray gun functions by drawing the material from a container using atmospheric pressure. The siphoning action occurs when air is forced through a nozzle, creating a negative pressure that pulls the resin up from the cup to the spray tip. This mechanism is particularly effective for achieving a smooth application of resin, as it allows for a consistent flow and is ideal for various applications, including larger surface areas.

In contrast, other types such as the cup gun and pressure pot utilize different mechanisms for material application. The cup gun relies on gravity or a pressurized source rather than siphoning. The pressure pot uses a large external container that holds the resin and pressurizes it, which then pushes the resin through the spray gun without relying on siphoning. Flow coaters, too, operate differently, usually applying a thick layer of resin on surfaces without the precise spray pattern achieved with a siphon mechanism.

Understanding the specific function of these tools helps in selecting the right equipment based on the application requirements in composite work.