Preparation method of monodirectional preimpregnation narrowband for automatic filament placement

An automatic wire laying and narrow-band technology, used in metal processing and other directions, can solve problems such as affecting performance, changing the direction of fiber arrangement, and complex mechanisms.

Inactive Publication Date: 2014-09-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, this method has the following disadvantages (1) The mechanism is complicated and a pressurizing device is required (2) Since the resin contained in the prepreg is in an uncured state and still has a certain fluidity, the process of pressing the polymer sheet Among them, the resin contained in the prepreg will flow along the transverse direction of the fiber, driving the transverse

Method used

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  • Preparation method of monodirectional preimpregnation narrowband for automatic filament placement

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Embodiment Construction

[0022] The present invention will be further elaborated below in conjunction with the schematic diagram of the present invention. After the wide-width prepreg 1 is unrolled, and before entering the razor slitting unit 3 or the circular knife slitting unit 5 where the blades are arranged in parallel, the backing paper on the surface of the wide-width prepreg 1 needs to be peeled off and rewound to the backing On the paper rewinding shaft 2, when the prepreg passes through the razor cutting unit 3 or the circular knife cutting unit 5, it is cut into several prepreg narrow strips with equal width. In view of the fact that during the cutting process of the razor, the cutting edge is fixed, the heat dissipation ability of the cutting tool is poor, and it is easy to generate heat, which will cause resin accumulation and affect the cutting quality. The temperature at the cutting edge is kept within a reasonable range. On the other hand, it also cools down the resin in the prepreg nea...

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Abstract

A convenient preparation method of a monodirectional preimpregnation narrowband for automatic filament placement belongs to the composite material laying and forming field, and mainly comprises the following steps: width prepreg uncoiling, back lining paper rewinding, prepreg slitting, preimpregnation narrowband coating, and spiral rewinding of a coated preimpregnation narrowband. The preimpregnation narrowband for automatic filament placement can be prepared by the method, and is continuous in length, constant in width, and good in unwinding.

Description

technical field [0001] The invention relates to the field of laying and forming of composite materials, in particular to a preparation method of a unidirectional prepreg narrow tape for automatic laying. Background technique [0002] Automated Fiber Placement is the fastest-growing composite material automatic forming technology in recent years, which has the technical characteristics of high efficiency, high quality and strong adaptability. This process adopts multiple bundles of prepreg narrow tapes (3~25mm), which are independently conveyed and cut, and several prepreg yarns are gathered under the pressure roller by the laying head to form a prepreg tape with variable width (the width is controlled by prepreg After adjusting the number of yarns), it is laid on the surface of the mandrel, heated to soften the prepreg yarn and compacted to shape. The patent with the authorized notification number CN 103079799 A proposes a method for preparing strips of prepregs with a cons...

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Application Information

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IPC IPC(8): B29C70/08B26D1/24B26D7/08B26D1/04
CPCB29C70/54B29C70/16B29C70/382
Inventor 肖军赵聪文立伟齐俊伟王显峰王跃全
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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