Quality resin filling process was carried out in shipbuilding by rotary vane vacuum pump
When vacuums are obtained by injecting resin into the GRP parts of a ship, quality is also concerned: specialized rotary vane vacuum pumps are used to make first-class sailboats.
All ships have a shell and inner shell made of fiberglass reinforced plastic, and the resin used is mainly vinyl ester or epoxy. During resin injection, only rotary vane vacuum pumps are used, as this is the most proven and successful method in daily use. It was decided to build these boats out of soaked fibers. They built a new room inside to ensure the temperature needed to process and dry the resin. It is important to use only rotary vane vacuum pumps for vacuum generation. After all, for this all-important contract, all ships must be manufactured with completely reliable and accurate parameters, and the factors of temperature, time and vacuum must be precisely coordinated.
Rotary vane vacuum pumps are widely used in industrial fields. In the resin infusion process, it is important not only that they reach the vacuum level of 0.1 mbar on a continuous basis, equivalent to 99.99% vacuum degree, but also that they can produce a high enough pumping speed in vacuum. After all, even if the synthetic nuclei were sealed with very precise aluminum foil, the leakage could result in a small amount of air being permeated and then requiring immediate reextraction with a vacuum pump. High vacuum performance ensures fast, bubble-free and complete resin filling. The performance of rotary vane vacuum pumps can be controlled by throttle valves, for example, to prevent resin from flowing too quickly into the mold. This ensures a high quality product and means that the cost of repair is no longer applicable. Their oil-seal function means that the rotary vane vacuum pump is not sensitive to the gas produced during the drying process. These are delivered by vacuum pumps without being compressed. A resin well is connected upstream of each vacuum pump to prevent resin from entering the vacuum pump. Vacuum pumps have been used for decades. Although the vacuum pump has been operating throughout the drying process, there has not been any failure or shutdown.(Rotary vane vacuum pump for mass resin infusion process in shipbuilding)
Maintenance is limited to an annual oil change. In shipyards, this can be organized by telephone and performed by service technicians. Therefore, the future shipyard can also guarantee a safe vacuum supply.