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Extrusion and compression molding method for fiber reinforced plastic part and capable of achieving series blasting synergetic blending

A technology of fiber-reinforced plastics and compression molding, which is applied in the field of injection molding processing. It can solve the problems of difficulty in reconciling the length of fiber dispersion and retention, and achieve the effects of shortening the injection molding cycle and thermomechanical history, reducing pressure, and reducing the degree of fracture.

Inactive Publication Date: 2021-08-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an irreconcilable contradiction between the dispersion effect of the fiber and its retained length under the strong shear of the traditional screw-type plasticizing and conveying equipment

Method used

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  • Extrusion and compression molding method for fiber reinforced plastic part and capable of achieving series blasting synergetic blending
  • Extrusion and compression molding method for fiber reinforced plastic part and capable of achieving series blasting synergetic blending

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] In this embodiment, the equipment used in the process of series blasting synergistic blending and extrusion injection mold filling is a twin-shaft eccentric rotor extruder, such as figure 1 As shown, the twin-shaft eccentric rotor extruder is mainly composed of the first feed port, the second feed port, two eccentric rotors, the stator, the heater, the exhaust port and the self-locking nozzle, wherein the first feed port , The second feed port and the exhaust port are connected with the inner cavity of the stator, and the first feed port, the second feed port and the exhaust port are distributed sequentially along the direction of material travel; the heater is installed on the outer wall of the stator, 2 Two eccentric rotors are arranged parallel to the inner cavity of the stator, the self-locking nozzle is installed at the outlet of the stator, and the self-loc...

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Abstract

The invention discloses an extrusion and compression molding method for a fiber reinforced plastic part and capable of achieving series blasting synergetic blending. The extrusion and compression molding method mainly comprises the three processes of series blasting blending, extrusion mold filling and compression filling. In the series blasting blending process, a polymer matrix and fibers are periodically compressed and released in the mixing and blending process, accumulation and release of pressure trigger a series of blasting effects so as to strengthen the mixing and blending effect and enable the fibers to be oriented in the flowing direction, and the fracture degree of the fibers in the blending process is greatly reduced while the fibers are promoted to be fully and uniformly dispersed; and meanwhile, series blasting synergistic blending and extrusion mold filling are carried out synchronous in the extrusion mold filling process, so that the injection molding period and the thermal mechanical process of a fiber reinforced system are greatly shortened, and low-loss processing of the fiber reinforced system is favorably realized.

Description

technical field [0001] The invention relates to injection molding processing technology, in particular to a method for extrusion compression molding of fiber-reinforced plastic parts with series explosion synergistic blending. Background technique [0002] In recent years, domestic fiber-reinforced thermoplastic composite materials have developed rapidly, and their proportion in the total amount of composite products has maintained a steady growth trend year by year. One of the research hotspots and development directions. Injection molding is the most important molding method for producing fiber-reinforced plastic parts. According to statistics, at least 50% (mass fraction) of fiber-reinforced plastic parts are formed by injection molding. Through the "one-step" or "two-step" molding process, the polymer matrix and an appropriate amount of fibers are melted and blended, and then injection-molded into the desired shape. advantages, etc. [0003] However, the injection mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/47B29C45/60
CPCB29C45/47B29C45/60
Inventor 吴婷瞿金平
Owner SOUTH CHINA UNIV OF TECH
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