Heating device for two-step winding of fibre reinforced thermoplastic polymer

Abstract

The invention discloses a heating method and a heating device for two-step winding of continuous fibre reinforced thermoplastic polymer composite materials. In the method, a pre-impregnating belt with continuously-changed length between a drying tunnel and a core mould is well heated and insulated by a swingable and telescopic heating device, so the exposure time of the pre-impregnating belt in air at room temperature is shortened, the pre-impregnating belt can keep a required temperature during winding, and good interlayer inter-diffusion can be formed for a thermoplastic polymer in a winding process to make an interlayer firmly adhered. The core mould and a pressure roll are heated by a core mould and pressure roll heating system to have the same temperature so as to control cooling of the pre-impregnating belt, so good interlayer adhesion can be formed for the pre-impregnating belt under the action of the pressure roll, and a heat stress which is generated in an extrusion area due to temperature inconsistency of the core mould and the pressure roll can be relieved. A corresponding device comprises a far infrared drying tunnel, the swingable and telescopic heating device, a hot-air gun and the core mould and pressure roll heating system.

Description

technical field [0001] The invention relates to a heating method and a device for two-step winding molding of continuous fiber-reinforced thermoplastic polymer composite materials, belonging to the field of composite material preparation and molding. technical background [0002] Winding molding is an important way to prepare fiber-reinforced polymer composite pipes and storage tanks. So far, the fiber-reinforced thermosetting composite material winding molding process and corresponding devices have been quite mature and have been widely used in industrial production. In recent years, due to the increasingly prominent pressure on resources and environmental protection, thermoplastic composite materials that are easily regenerated and reusable have received widespread attention from all over the world, and various types of thermoplastic composite materials have been developed rapidly. The winding of continuous fiber reinforced thermoplastic polymer composite materials Shaping...

AI Technical Summary

Problems solved by technology

U.S. Patent No. 5,039,368 describes a continuous fiber-reinforced thermoplastic polymer winding device that uses a tungsten lamp to heat the pressure roller and a mandrel surface heater to heat the mandrel. However, its structure is complex, and the heating is uneven and the temperature controllability is poor. The waste of energy is serious, and it is difficult to keep the temperature of the surface of the core mold and the surface of the pressure roller close, and the temperature difference between the surface of the core mold and the surface of the pressure roller will form thermal stress in the wound product, resulting in product performance degradation

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