What is the process of vacuum hot press molding machine?

Hot melt impregnation method

Hot melt impregnation is also known as resin film impregnation, its main advantages:Fiber rows of yarn straight and uniform, containing the most glue, band width, band thickness can be precisely controlled. Hot pressure impregnation. Good impregnation effect, no gap between the yarn bundles. Help to reduce the void ratio of the product: no solvent volatilization, good labor environment. Hot melt impregnation is carried out on a special hot melt impregnation machine. After the machine starts, the traction roller pulls the upper and lower isolation paper and the continuous fiber to move synchronously. At this time, the resin heated to a molten state is uniformly coated to the corresponding single side of the upper and lower barrier paper through the coating rollers, and the adhesive film on the upper and lower barrier paper sandwiches the fibers in the middle. The molten resin is immersed into the fibers through the pressurized rollers, cooled, and then the top and bottom barrier papers and prepregs are rolled separately for use. The rubber content of the prepreg can be controlled by adjusting the gap between the squeegee roller and the coating roller, and by adjusting the temperature and paper speed.

Molding mold

Hot press cans mold mold mold material requirements in the product molding frustration and pressure to maintain appropriate performance, but also take into account the cost of the chess set, life, tiptoe, strength, quality of the most, machinability, coefficient of thermal expansion, the size of the German qualitative surface treatment and thermal conductivity, and so on. Mold manufacturing can choose aluminum, steel, nickel alloy, electrodeposition set and carbon / epoxy composite materials.

Simulation of hot press can molding process

In the hot press can molding process, the following major physical and chemical changes will occur: ① resin flow in the fiber to promote the resin to fully saturate the fiber; ② fiber reinforced network compaction to ensure that the fiber volume fraction in the composite component is maximized; ③ appropriate curing pressure to inhibit the formation of pores in the resin matrix; ④ appropriate curing temperature cycle. to ensure adequate curing of the resin. All these physicochemical processes can be process simulated by establishing a resin flow model, a fiber deformation model, a fiber celebration model, a pore formation model, a heat transfer model, etc., and uniformly integrating these models into a software system for curing process optimization.