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Long-fiber reinforced thermoplastic resin composite material forming device and technology

A technology of resin composite materials and enhanced thermoplasticity, applied in the field of long fiber reinforced thermoplastic resin composite materials, can solve the problems of low running speed, stress concentration, fiber breakage, etc., to improve reliability and stability, reduce stress concentration, and reduce stress concentration Effect

Active Publication Date: 2020-07-24
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of device can increase the fiber content in the composite material, the fiber does not achieve internal infiltration under this process condition. When the two bundles are combined into one bundle, the fiber running speed is low. Increasing the running speed will lead to fiber breakage
[0005] At present, there is also a molding equipment and molding method for long fiber reinforced thermoplastic resins. When the fibers and resin are infiltrated, they need to pass through a plurality of arc-shaped or concave polygonal small grooves with 2 to 6 concave features. , in fact, when the fiber passes through such a large number of grooves, under the action of tension, it is easy to cause stress concentration, which leads to fiber breakage, resulting in unstable production
[0006] Based on the above considerations, the improvement of the fiber wettability and production efficiency of long fibers in the impregnation mold has not been improved by the existing technology.

Method used

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  • Long-fiber reinforced thermoplastic resin composite material forming device and technology
  • Long-fiber reinforced thermoplastic resin composite material forming device and technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a molding device for long-fiber reinforced thermoplastic resin composite materials, including: sequentially distributed fiber concave tube channels 2, air-flow fiber opening device 3, mechanical spreading roller 4, fiber infiltration molding device, cooling and shaping device 11 and cutting Cutting unit 12; wherein the fiber infiltration molding device includes a fiber inlet module 5, a molten resin impregnation mold 7 and a fiber outlet module 10, and the interior of the molten resin impregnation mold 7 includes a counter-pressure roller 6 and a tension roller 8 arranged in sequence, and the tension roller 8 The quantity is 3.

[0062] During implementation, the fiber bundle 1 enters the fiber concave tube channel 2 and then passes through the airflow opening device 3, then passes through the mechanical spreading roller 4, then passes through the fiber infiltration forming device, and after passing through the cooling and shaping device 11, ente...

Embodiment 2

[0070]This embodiment provides a molding device for long-fiber reinforced thermoplastic resin composite materials. The overall structure of the molding device is the same as that of the device in Embodiment 1, the difference is that:

[0071] There are concave channels arranged in parallel on the fiber concave tube channel 2, the number of concave channels is 20, and one concave channel passes through two 24K carbon fiber bundles; the gas velocity of the airflow fiber opening device 3 is 15m / s; the mechanical expansion The number of rollers 4 is 4, and the heating temperature is 280°C; the distance between the fiber feeding module 5 and the mechanical unfolding roller 4 is 0.15 meters; the distance between the two rollers of the pressure roller 6 is 0.8mm; the height of the tension roller 8 is 2 / 3 of the internal height of the resin impregnation mold 7; the screw extruder 9 is a twin-screw extruder, and the resin used is polyamide 66; the fiber outlet module 10 is distributed w...

Embodiment 3

[0078] This embodiment provides a molding device for long-fiber reinforced thermoplastic resin composite materials. The overall structure of the molding device is the same as that of the device in Embodiment 1, the difference is that:

[0079] Concave channels arranged in parallel are distributed on the fiber concave tube channel 2, the number of which is 20, and one concave channel passes through three 2400tex glass fiber bundles; the gas velocity of the airflow fiber opening device 3 is 15m / s; The number of mechanical spreading rollers 4 is 5, and the heating temperature is 220° C.; the distance between the fiber feeding module 5 and the mechanical spreading rollers 4 is 0.12 meters; the distance between the two rollers of the pressure roller 6 is 1 mm; the height of the tension roller 8 is 3 / 5 of the internal height of the molten resin impregnation mold 7; the screw extruder 9 is a single screw extruder, and the resin used is high-density polyethylene; the fiber outlet modul...

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Abstract

The invention discloses a long-fiber reinforced thermoplastic resin composite material forming device and technology, and belongs to the field of long-fiber reinforced thermoplastic resin composite materials. The problem that in the prior art, the long-fiber reinforced thermoplastic resin composite materials are poor in wettability, high in breakage rate and poor in reliability is solved. The long-fiber reinforced thermoplastic resin composite material forming device comprises an airflow splitting device, mechanical unfolding rollers and a fiber wetting forming device. The airflow splitting device, the mechanical unfolding rollers and the fiber wetting forming device are arranged in sequence. The fiber wetting forming device comprises a molten resin impregnation mold. Opposite press rollers and tension rollers are arranged in sequence and are arranged inside the molten resin impregnation mold. The long-fiber reinforced thermoplastic resin composite material forming device can improve the wettability of the long-fiber reinforced thermoplastic resin composite materials, reduce the breakage rate and improve the reliability.

Description

technical field [0001] The invention relates to the technical field of long fiber reinforced thermoplastic resin composite materials, in particular to a molding device and process of long fiber reinforced thermoplastic resin composite materials. Background technique [0002] Long fiber reinforced thermoplastic resin composite material (LFT-G) is a long fiber reinforced thermoplastic matrix composite material supplied to the market in the form of long granular semi-finished prepreg materials. It is usually manufactured by fiber pre-mixing, fixed-length fiber mixing extrusion, continuous fiber extrusion coating and other processes. Such semi-finished prepreg materials can be processed into thermoplastic composite parts by secondary processing such as heating molding and injection molding. Compared with chopped fiber reinforced composite materials, it has the advantages of high modulus, high strength and high toughness. It can replace some metal parts in the automotive industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/50B29C70/54
CPCB29C70/506B29C70/54
Inventor 朱祥东程宝发任明伟杨涛何琪范广宏周玉敬王玮
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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