It is understood that FRP fishing boats have the advantages of good stability, resistance to wind and waves, fast speed, long life, low energy consumption and low maintenance costs. At present, they have become the mainstream ship type of small and medium-sized fishing boats in developed countries and regions of the world. Captain of Japan and South Korea30 The tempered glass rate of fishing vessels below the meter reaches more than 95%, while China's FRP fishing vessels account for less than 5%. The development of FRP fishing vessels is very disproportionate to the rapid rise of China's national economy. The "Thirteenth Five-Year Plan for National Fisheries Development" clearly proposes to speed up the renovation and transformation of fishing vessels, with the goal of safety, energy saving, economy, environmental protection and livability, and gradually phase out old, wooden, high-energy-consuming and polluting fishing vessels To build a fishing boat with good selectivity, high efficiency, energy saving, safety and environmental protection.
With vigorous publicity and encouragement from the state, the fishermen have gradually accepted this new type of fishing boat, and the orders for FRP fishing boats have been increasing. With the vigorous development of the FRP fishing boat industry, the backward and backward contradiction in the design and manufacturing technology of the FRP fishing boat is becoming more and more prominent. In particular, the FRP fishing boat ship building and forming process basically uses traditional manual gluing. The traditional hand lay-up process has many drawbacks and shortcomings. Such as environmental pollution, high labor costs, waste of raw materials, and the impact of chemical raw materials on health. Vacuum assisted molding technology is a new type of composite material molding technology developed in recent years.
Its main features are low cost, low porosity, environmental friendliness, uniform quality, and high fiber content. For one-time molding of large-sized structural parts with sandwich and reinforcement, vacuum-assisted forming technology is an ideal process method. This process is developing rapidly in the industries of ships, wind power, aircraft, and automobiles.
Vacuum assisted molding technology has the following advantages:
1. The use of vacuum can increase the ratio of glass fiber to resin and make the fiber content of the product higher;
2. Vacuum helps resin impregnate the fiber and make fiber impregnation more adequate;
3. Vacuum also plays a role in eliminating the air in the fiber bundle, so that the fiber is more fully infiltrated, thereby reducing the formation of microscopic voids and obtaining products with a lower void rate;
4. Vacuum assisted molding technology has better molding performance