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Double-faced melt impregnation method and device for continuous long fiber reinforced thermoplastic resin

A technology of reinforced thermoplastic and melt impregnation, applied in the direction of coating, etc., can solve the problems of affecting fiber content and product appearance, non-uniformity of melt feeding, difficult to coat and infiltrate fiber bundles, etc. Uniform, avoid lax coating, balanced impregnation effect

Active Publication Date: 2014-05-07
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the resin melt also emerges from the lower side of the discharge roller, so it is difficult to fully cover the infiltrated fiber bundles, and each fiber has the inhomogeneity that one side is infiltrated first, and the other side is infiltrated later; secondly, the equipment will The apex of the feed roller is the place where the fiber and the resin meet and infiltrate. Since the apex of the discharge roller is the crest, the tension is the highest. Although the effect of fiber impregnation can be enhanced, the risk of fiber breakage is increased, and the phenomenon of strip breakage is prone to occur; again, The equipment divides the outlet of the resin melt into two, so that the long fiber bundles are infiltrated twice successively, and the melt resistance of the two flow channels is different, which may cause inhomogeneity of the melt feeding and cause greater impregnation differences, ultimately affecting fiber content and product appearance

Method used

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  • Double-faced melt impregnation method and device for continuous long fiber reinforced thermoplastic resin
  • Double-faced melt impregnation method and device for continuous long fiber reinforced thermoplastic resin
  • Double-faced melt impregnation method and device for continuous long fiber reinforced thermoplastic resin

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In this embodiment, a method for double-sided melt impregnation of continuous long fiber reinforced thermoplastic resin comprises the following steps:

[0048] (1) After the continuous long fiber enters the fiber channel, it first enters the fiber pre-dispersion area, and the continuous long fiber is pre-dispersed and pre-heated by the pre-dispersion device;

[0049] (2) The pre-dispersed and pre-heated continuous long fibers enter the resin-impregnated fiber area, and the resin melt flows out from the double-sided distribution channel, and simultaneously infiltrates and penetrates the continuous long fibers from the upper and lower sides, so that the continuous long fibers are melted by the resin. The body is fully wrapped and infiltrated, and then the resin melt content of the continuous long fiber is smoothed and balanced by the calender roll group;

[0050] (3) The impregnated continuous long fiber enters the fiber redispersion zone, and the fiber is dispersed again...

Embodiment 2

[0067] This embodiment is a double-sided melt impregnation equipment for continuous long fiber reinforced thermoplastic resin. Compared with Embodiment 1, the difference is that: Figure 4 As shown, in the fiber redispersion zone, the redispersing device includes an upper dispersing roller 8 and a lower dispersing roller 9, the upper dispersing roller is arranged above the continuous long fiber, the lower dispersing roller is arranged below the continuous long fiber, the upper dispersing roller and the lower dispersing roller are arranged. The dispersing rollers are alternately distributed and arranged at equal intervals, and the fiber channel is wavy;

[0068] The upper dispersing roller and the lower dispersing roller have the same structure, both are smooth rollers with a square cross-section, the length of each side of the square is 5-60mm, and the corners of each square are rounded at 90-150°; each upper dispersing roller and lower dispersing roller There are electric hea...

Embodiment 3

[0070] This embodiment is a double-sided melt impregnation equipment for continuous long fiber reinforced thermoplastic resin. Compared with Embodiment 1, the difference is that: Figure 5As shown, in the fiber redispersion zone, the redispersing device includes an upper dispersing roller 8 and a lower dispersing block 5, an upper dispersing roller is provided above the continuous long fiber, a lower dispersing block is provided below the continuous long fiber, and the upper dispersing roller and the lower dispersing block are arranged. The dispersing blocks are distributed alternately and arranged at equal intervals, the fiber channel is wavy, the upper dispersing roller is placed in the trough, and the distance between the outer edge and the trough is 1-15mm;

[0071] Among them, the upper dispersing roller is a smooth roller with a square cross-section, the length of each side of the square is 5-60mm, and the corners of each square are rounded corners of 90-150°; each upper ...

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Abstract

The invention discloses a double-faced melt impregnation method and device for continuous long fiber reinforced thermoplastic resin. The method comprises the steps of firstly carrying out pre-dispersion and preheating on continuous long fibers, then carrying out comprehensive packaging and infiltration by virtue of a double-faced distribution runner, carrying out fiber re-dispersion processing, and sending the treated fibers out of a fiber channel. The device is characterized in that a fiber pre-dispersion region, a resin-infiltration fiber region and a fiber re-dispersion region are arranged in the fiber channel in a melt impregnation machine head, wherein the double-faced distribution runner is arranged in the resin-infiltration fiber region and comprises an upper-layer distribution runner and a lower-layer distribution runner which are structurally symmetrical; a pre-dispersion device is arranged in the fiber pre-dispersion region, and a re-dispersion device is arranged in the fiber re-dispersion region. According to the double-faced melt impregnation method and device, an impregnation effect of resin melt to continuous long fiber bundles is balanced, purposes of complete cladding, permeation and infiltration are achieved, a phenomenon that the single sides of the fibers are not tightly clad is avoided, the long-time continuous stable production is realized, and the yield and the quality of a product are substantially improved.

Description

technical field [0001] The invention relates to the technical field of thermoplastic resin molding, in particular to a double-sided melt impregnation method and equipment for continuous long fiber reinforced thermoplastic resin. Background technique [0002] Continuous long fiber reinforced thermoplastic resin is an intermediate used to prepare composite materials with thermoplastic resin as the matrix and reinforced fibers arranged in one direction and continuously. It has a wide range of applications in the fields of transportation, automobiles, petroleum, natural gas or construction. Especially in the field of automobiles, continuous long-fiber-reinforced thermoplastic resins can be drawn and pelletized by a die with a specific shape to obtain long-fiber-reinforced pellets, and then formed by secondary injection molding to form long-fiber-reinforced parts, which can widely replace various parts inside automobiles. A variety of metal structural parts, such as front-end mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B15/14
Inventor 王琪李永华陈大华宋威黄有平张超陈春华欧相麟
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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