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Slitting preparation method suitable for hot-melt pre-impregnated filament

A prepreg, hot-melting technology, applied in the field of composite material forming, can solve the problems of splitting, narrowing of the width, and difficulty in achieving high-quality slitting, and achieve the effect of avoiding the narrowing of the width of the tow.

Active Publication Date: 2015-12-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are obvious technical problems in the preparation of high-viscosity prepregs for grid formation at room temperature: prepregs are too viscous, and there are width narrowing, sticking to knives, sticking to rolls, etc. during slitting and winding processes. Discount, splitting and other problems, the existing preparation process is difficult to achieve high-quality cutting

Method used

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  • Slitting preparation method suitable for hot-melt pre-impregnated filament

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Effect test

Embodiment 1

[0017] like figure 1 As shown, a kind of slitting preparation method suitable for high-viscosity hot-melt prepreg according to the present invention, its specific steps are as follows:

[0018] (a) In a low temperature box 12 at 5°C to room temperature (for example: 5°C, 10°C or 25°C), unwind the prepreg tape with paper backing and plastic film from the prepreg tape reel of the unwinding assembly 1 Unwinding at 22, passing through the first guide roller 5, overlapping the hot table 2, and entering the slitting assembly 3 to prepare for slitting;

[0019] (b) In the low-temperature box 12 at 5°C to room temperature (for example: 5°C, 10°C or 25°C), the prepreg tape with paper backing and plastic film passes through the second guide roller 6 of the slitter assembly 3 , separate the paper backing, and the separated paper backing is rewound on the backing winding shaft 7; while the prepreg tape with plastic film continues to pass through the forced cold channel 8, and the prepreg...

Embodiment 2

[0023] like figure 1 As shown, a kind of slitting preparation method suitable for high-viscosity hot-melt prepreg according to the present invention, its specific steps are as follows:

[0024](a) In a low temperature box 12 at 5°C to room temperature (for example: 5°C, 10°C or 25°C), unwind the prepreg tape with paper backing and plastic film from the prepreg tape reel of the unwinding assembly 1 Unwinding at 22, passing through the first guide roller 5, overlapping the hot table 2, and entering the slitting assembly 3 to prepare for slitting;

[0025] (b) In the low-temperature box 12 at 5°C to room temperature (for example: 5°C, 10°C or 25°C), the prepreg tape with paper backing and plastic film passes through the second guide roller 6 of the slitter assembly 3 , continue to pass through the forced cold channel 8, in which the prepreg wire is forcibly cooled to 0°C~5°C (for example: 0°C, 3°C or 5°C); the prepreg tape after forced cooling is flattened The roll 9 is sent to...

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Abstract

The invention provides a slitting preparation method suitable for a hot-melt pre-impregnated filament. The slitting preparation method comprises the following steps: in a low-temperature tank ranging from 5 DEG C to the room temperature, uncoiling a pre-impregnated belt with paper back lining and plastic coating by virtue of an uncoiling assembly; after being forcibly cooled, feeding the pre-impregnated belt to an upper cutter and a lower cutter to carry out slitting, wherein the slitting width of the pre-impregnated belt ranges from 4mm to 12 mm; transmitting slit pre-impregnated filaments with coating as wide as the pre-impregnated belt to a coiling assembly, and fitting plastic coating with width greater than those of the pre-impregnated filaments with the pre-impregnated filaments with coating as wide as the plastic coating; and finally, winding, according to a fixed line shape, the pre-impregnated filaments with upper and lower layers of plastic coating to a pre-impregnated filament coiling shaft of the coiling assembly. According to the slitting preparation method, in order to solve the problems that a great number of pre-impregnated filaments have roller-sticking, folding, filament-splitting, width-reducing, and the like because of great viscosity in a high-viscosity pre-impregnated filament coiling process, the invention discloses a method for carrying out slitting coiling on the pre-impregnated belt under a low-temperature condition, thereby preventing problems such as knife-sticking, roller-sticking, filament-winding, width-reducing and the like in a pre-impregnated filament slitting process.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and in particular relates to a cutting preparation method suitable for high-viscosity prepreg. Background technique [0002] Grid ribs are formed by laying prepreg filaments in elongated grooves, and the prepreg filaments used need to have high viscosity to facilitate compaction and flattening during the molding process. The original prepreg is a solution method prepreg, the preparation process is seriously polluted, the airing time is long, the floor area is large, and the production efficiency is low; the glue content is high, the fluctuation is large and the volatile content is high, and it is easy to twist during use. , It is not conducive to the exertion of fiber strength, resulting in large fluctuations in product performance and a decline in overall performance. The hot-melt prepreg can effectively improve the above problems and improve the quality of components. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/54
CPCB29C70/545
Inventor 张建宝赵文宇王俊锋郑红飞张艺萌李红孙文文陈亮沈登雄赵从会强基森
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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