Cila është metoda kryesore e derdhjes së bordi me fibra qelqi epoksi

1. Shtrimi i dorës-shtrimi i lagësht

Apply a release agent and a layer of medium-active liquid thermosetting resin with a viscosity of 0.3-0.4PaS to the surface of the mold in turn (after the gel coat is coagulated) and a layer of fiber reinforced materials. The fiber reinforced materials have surface felt and non-twisted coarse There are several kinds of gauze (checkered cloth). Use a hand-held roller or brush to impregnate the fiber reinforced material with resin, drive out air bubbles, and compact the base layer. The layup operation is repeated many times until the design thickness of the product is reached. The resin is cured at room temperature due to polymerization reaction. Can be heated to accelerate curing. At present, hand lay-up is the main form in my country, which accounts for about 80% of resin-based composite materials.

2. Injektimi i rrëshirës dhe transferimi i rrëshirës derdhur RTM

RTM është një metodë e derdhur me presion të ulët me myk të mbyllur. Vendoseni materialin e përforcuar me fibra midis formave të sipërme dhe të poshtme; mbyllni mykun dhe kapeni mykun; injektoni rrëshirën nën presion; hapeni mykun pasi rrëshira është kuruar dhe hiqeni produktin. Para fillimit të procesit të xhelatinës së rrëshirës, ​​rrëshira duhet të mbushet në zgavrën e mykut dhe presioni e bën rrëshirën të transferohet shpejt në myk dhe të ngopë materialin e fibrave.

3. Derdhja e fletës SMC (pjesa më e madhe e BMC)

Add initiators, fillers, pigments, internal mold release agents, low-shrinkage additives, thickeners, etc. into the resin, and mix them to form a resin paste. The resin paste falls on the lower film of the SMC unit (commonly used polyethylene film or nylon film), and at the same time, it settles on the lower film and chopped into 25～55mm glass fiber strands, and then is covered with a layer of film to become a sheet. Sandwich roll. Store the coil for several days to thicken the material to reach a moldable viscosity. SMC is supplied as a backup in a bundled state. The coil is unrolled, cut, weighed, put in the heated steel mold platinum, pressurized to solidify and mold, and then the finished product is obtained.