Forming device for preparing continuous fiber reinforced thermoplasticity prepreg through ultrasonic suspension liquid method

Abstract

The invention discloses a forming device for preparing continuous fiber reinforced thermoplasticity prepreg through an ultrasonic suspension liquid method. The forming device sequentially comprises ayarn frame, a tension system, a yarn separating system, a guide roller, an ultrasonic wave suspension liquid powder groove system, an airflow powder feeding system, a guide mechanism, a drying chamber, a fusion chamber, a cooling system and a rolling system. According to the forming device, the ultrasonic wave suspension liquid powder groove system can avoid powder agglomeration and gathering; theairflow powder feeding system can achieve automatic precise feeding according to needs, and the prepreg can be distributed in resin beneficially; a transcrystallinity generation chamber in the fusionchamber can increase the transcrystallinity generation rate of the resin, and the interface bonding strength of fiber and the resin is improved; and the cooling speed of the cooling system can be adjusted, the thermoplasticity resin crystallinity degree is controllable, and the covering performance of the prepreg can be adjusted beneficially according to needs.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic composite material prepreg molding, and relates to a molding device for preparing continuous fiber-reinforced thermoplastic prepreg by an ultrasonic suspension method. Background technique [0002] High-performance thermoplastic composites are gradually regarded as thermosetting composites in advanced industries such as aerospace due to their outstanding features such as good heat resistance, toughness, low moisture absorption, unlimited prepreg storage life, and non-autoclave molding. Potential alternatives for materials. [0003] The preparation methods of continuous fiber-reinforced thermoplastic prepreg include solution impregnation method, spraying powder method, suspension impregnation method, melting method and fiber mixing method, etc. The solution impregnation method is to dissolve the thermoplastic resin in a suitable solvent to reduce its viscosity to a certain level, and then us...

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Problems solved by technology

The above methods all have certain limitations. The solution impregnation method is difficult to find a suitable solvent for thermoplastic resins such as polyethersulfone and polyetheretherketone, and it is difficult to apply to high-performance thermoplastic resins; the spraying powder method has local powder aggregation, and the prepreg Defects such as uneven glue content; melting method, because the thermoplastic resin is heated for a long time during the molding process, resulting in stiff prepregs and poor covering properties; fiber mixed weaving method, because it is difficult to obtain ultra-fine thermoplastic resin fibers. Easy to cause fiber damage, which limits the application of this technology

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