Non-isothermal forming device and technique for continuous fiber reinforced thermoplastic composite material

Abstract

The invention relates to a non-isothermal forming device and technique for continuous fiber reinforced thermoplastic composite material. The non-isothermal forming device for the continuous fiber reinforced thermoplastic composite material comprises a male die assembly, a female die assembly, an edge pressing assembly, a supporting and guiding assembly, a demolding assembly and a temperature control assembly. The non-isothermal forming technique for the continuous fiber reinforced thermoplastic composite material comprises the following steps that a female die base and a male die are preheated, a blank is placed between a female die and an edge pressing ring, the blank, the female die and the edge pressing ring are put into an external heating device to be preheated to a target temperatureand then put into the female die base, the male die moves down to complete the deformation of the blank, heating inserts are then taken away, the liquid circulation is carried out to cool the dies and a workpiece, and finally, the dies are opened and the workpiece is taken out. According to the non-isothermal forming device and technique for the continuous fiber reinforced thermoplastic compositematerial, a traditional composite material hot-press forming technique is simplified, the equipment requirement is reduced, meanwhile, the high and low temperature circulation working conditions of aheating device are avoided, and the forming quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of hot stamping forming of continuous fiber-reinforced thermoplastic resin matrix composite materials, and particularly relates to a non-isothermal forming device and process of continuous fiber-reinforced thermoplastic resin matrix composite materials. Background technique [0002] Today, with the continuous pursuit of lightweight in transportation, aerospace and other fields, thermoplastic resin-based composite materials have gradually attracted people's attention due to their advantages of light weight, high strength, impact resistance, long storage time and recyclability. Compared with reinforced composite materials such as short fibers and medium-long fibers, continuous fiber reinforced composite materials maintain the fiber integrity before forming in certain directions in the part, which greatly improves the mechanical properties of the part in this direction. However, for single-piece or small-batch ...

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Problems solved by technology

In addition, the way of overall heating and overall cooling of the mold requires the overall mold to be lowered to room temperature before taking out the part after forming. Therefore, not only the life of most parts of the mold is affected by the high and low temperature cycle environment, but also the life of the mold is greatly extended. Heating and cooling times reduce productivity

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