Online forming method of long fiber reinforced thermoplastic resin product

A technology to enhance thermoplasticity and thermoplastic resin, applied in the direction of coating, etc., can solve the problems affecting the mechanical properties of the product, not fully infiltrated, unable to fiber, etc., to ensure production continuity and stability, good production continuity and stability , The effect of simplifying the operation of molding processing

Active Publication Date: 2021-06-18
台州维一新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] LFT-D process, the screw drives the fiber bundle to enter and twist, and mixes with the hot-melt resin. The fiber has not been preheated and dispersed, and the fiber has not been fully infiltrated after entering, but the fiber is simply fused with the hot-melt resin after entering. Afterwards, cut into pieces quantitatively, and then grab the robot into the mold to make the product under the heat preservation state. The fiber cannot be dispersed, and the fiber cannot be impregnated well. It can only be a simple coating and impregnation of the cable coating type.
Therefore, it will eventually affect the mechanical properties of the product

Method used

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  • Online forming method of long fiber reinforced thermoplastic resin product
  • Online forming method of long fiber reinforced thermoplastic resin product
  • Online forming method of long fiber reinforced thermoplastic resin product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] combine figure 1 As shown, the online molding method of the long fiber reinforced thermoplastic resin product is as follows:

[0031] The continuous fiber bundles of several selected bundles are unwound and pulled out from the coil on the fiber rack 1, and continuously pass through the fiber bundle dispersion and preheating treatment device 3 for preheating and dispersion treatment under the action of the traction force. It is better to enter the dispersing and preheating device 3 after being rotated and adjusted during the unwinding and pulling out process; to make all the continuous fiber bundles enter the impregnation mold 4 of the impregnation process after preheating and dispersing; the continuous fiber bundles here It is best to use one or more of carbon fiber bundles, glass fiber bundles or basalt fiber bundles, which have better reinforcing properties.

[0032]The thermoplastic resin (may include additives such as auxiliary materials and auxiliary agents) can b...

Embodiment 2

[0036] combine figure 1 As shown, the method for online forming gears of this long fiber reinforced thermoplastic resin product is as follows:

[0037] The continuous fiber bundles of 70 bundles of glass fibers are synchronously unwound, adjusted and pulled out from the coils on the fiber rack 1 to enter the dispersion and preheating device 3 for preheating and dispersion treatment. The preheating temperature here is 120°C-150°C, make all 70 bundles of continuous fiber bundles enter the impregnation mold 4 in the impregnation process after preheating and dispersion, and combine figure 2 Here, multiple groups of pressure rollers 41 are rolled in the impregnation mold 4 to roll the incoming continuous fiber bundles, preferably 6-8 groups of pressure rollers 41 are clamped up and down to be arranged in the impregnation mold 4, so that all fiber bundles are It can get the upper and lower sides of the extrusion infiltration multiple times. Other ways can also be used to repeated...

Embodiment 3

[0043] combine figure 1 As shown, the method for online forming gears of this long fiber reinforced thermoplastic resin product is as follows:

[0044] The selected continuous fiber bundles of 100 carbon fibers are synchronously unwound and pulled out from the coils on the fiber frame 1, and then entered into the dispersion and preheating device 3 for preheating and dispersion treatment. The preheating temperature here is about 120°C , make all 100 bundles of continuous fiber bundles enter the impregnation mold 4 in the impregnation process after preheating and dispersing, combine image 3 Here, multiple groups of pressure rollers 41 are rolled in the impregnation mold 4 to roll the incoming continuous fiber bundles, preferably 6-8 groups of pressure rollers 41 are arranged in the impregnation mold 4 at intervals up and down, which is equivalent to 4. Make the fiber bundle pass through in a tense front and back compression state.

[0045] Synchronously plasticize and melt th...

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Abstract

The invention relates to an online forming method of a long fiber reinforced thermoplastic resin product, and belongs to the technical field of plastic product composite materials. The problems that secondary remelting is needed and the product strength is reduced in the prior art are solved. The online forming method of the long fiber reinforced thermoplastic resin product comprises the steps that a plurality of continuous fiber bundles are unwound and pulled out to be preheated and dispersed; thermoplastic resin is plasticized, melted and extruded, the thermoplastic resin and the treated continuous fiber bundles enter a dipping procedure together, the continuous fiber bundles coated with the thermoplastic resin enter a cutting procedure through traction under heat preservation after dipping, and long fiber reinforced thermoplastic resin slurry is formed after cutting; and the long fiber reinforced thermoplastic resin slurry is conveyed into a heat preservation storage container for storage under heat preservation, and then conveyed into a forming mold for forming to obtain a corresponding product. Continuous production can be effectively achieved, the secondary remelting process is avoided, the forming machining operation is simplified, and the effect that the product strength is high is achieved.

Description

technical field [0001] The invention relates to an online molding method for long fiber reinforced thermoplastic resin products, belonging to the technical field of plastic product composite materials. Background technique [0002] Fiber-reinforced thermoplastic composites are widely used in aerospace, national defense, automobiles (bumpers and body parts), safety protection products, bicycle racks, building formwork systems, gears, pipe fittings and other fields, especially in fiber-reinforced thermoplastic Among the resins, long fiber reinforced thermoplastic resins (LFRT), which contain longer fibers (more than 10mm), have been widely used due to their excellent performance in impact resistance and rigidity. The fiber content of long-fiber reinforced thermoplastic resin products is generally 20%-80%. How to ensure the required fiber length and make it evenly dispersed in the composite material is also crucial for continuous and efficient production. At present, there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B15/14
CPCB29B15/14
Inventor 梁欢邦
Owner 台州维一新材料有限公司
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