The pultrusion molding process of epoxy resin composite materials is the method of extruding the continuous glass fiber bundles and other continuous reinforcing materials such as glass cloth tape and polyester surface felt impregnated with epoxy resin glue through the molding mold under the traction force, and curing the glass fiber reinforced plastic profiles in the mold and curing furnace, also known as the continuous pultrusion molding process, mainly producing glass fiber reinforced plastic profiles such as tubes, rods, profiles, plates, etc, At present, seven major application fields have been formed.
The pultrusion process has specific and obvious advantages. According to experts, the main problems are: simple equipment, low cost, high productivity, easy to form automatic production lines, and stable product quality; It can give full play to the role of reinforcing materials, with high mechanical properties, especially the longitudinal strength and modulus; The effective utilization rate of raw materials is high, and there is basically no corner waste; The longitudinal and transverse strength of the profile can be adjusted to meet different use requirements; Its length can be cut as required.
The pultrusion molding epoxy fiberglass products are mainly used in the following seven fields: one of the key areas of development in the electrical field is the most widely used fields at present, such as transformer air duct positioning rod, high-voltage insulator core rod, high-voltage cable protection tube, cable rack, insulation ladder, insulation pole, electric pole, track guard plate, cable distribution frame, motor parts, etc; The field of chemical corrosion protection is the fastest growing field in recent years. Typical products include pipe network support structures, sucker rods, underground pressure pipes, wastewater treatment equipment, chemical baffles, handrails, stairs, platform handrails, grating floors, etc. in chemical, petroleum, paper, metallurgy and other plants; The field of building structure is mainly used for light structures, superstructure of high-rise structures or special-purpose structures, such as prefabricated house structures, profiles for door and window structures, trusses, light bridges, railings, tent supports, ceiling structures, large boron structures, etc; Sports and entertainment fields such as fishing rod, hockey stick, snowboard, pole vault, bow and arrow, etc; In the field of transportation, such as car shelf, truck frame, refrigerated compartment, car spring plate, luggage rack, bumper, deck, electric train track guard, etc; In the energy field, it is mainly used for solar collector bracket, wind turbine blade, oil well duct, etc; In the aerospace field, such as aircraft and spacecraft antenna insulating tubes, spacecraft motor parts, aircraft composite I-beams, slot beams and square beams, aircraft pull rods, connecting rods, etc.
