What is a flow coater primarily used for in the context of composite applications?

A flow coater is primarily utilized in composite applications to apply a layer of resin through a fan-shaped spray. This process is crucial because it ensures an even and consistent distribution of resin over surfaces, which enhances the adhesion properties and overall performance of the composite materials. The fan-shaped spray allows for a broad coverage area and is particularly effective in saturating fibrous materials, contributing to the desired mechanical and aesthetic qualities of the composite.

The technique of using a flow coater can significantly streamline the application process, making it quicker and more efficient compared to manual application methods. By ensuring a uniform resin layer, it minimizes issues such as resin pooling or uneven thickness, which can compromise the integrity of composite structures.

While other options relate to important aspects of working with composites, they do not capture the primary function of a flow coater as accurately as the application of resin. Reinforcing existing laminates, measuring viscosity, and preparing surfaces for bonding are all critical tasks in composite work, but they serve different purposes and utilize different tools or techniques from a flow coater.