Your product may benefit from utilizing a closed-mold system, or Light RTM.
Light RTM, a closed mold process, utilizes matching molds comprised of a rigid “A-side” mold, the base, and a lightweight “B-side” mold that fits inside or on top of the A-side mold. Prior to closing the two molds, a pre-sized, cut and formed reinforcement is dry-loaded into the base mold. Rather than use pressure, Light RTM uses a vacuum to pull the catalyzed resin through the mold cavity, saturating the reinforcement creating a part with consistent thickness, a smooth B-side surface, and controlled fiber/resin ratios. Relative to other Closed Mold Processes, Light RTM offers lower tooling costs.