Method for improving appearance of continuous fiber reinforced thermoplastic composite material product

A technology to enhance thermoplastic and composite materials, applied in the direction of coating, can solve the problems of wrinkled product edges, burrs, etc., to achieve the effect of improving appearance, improving production efficiency, saving time and money investment

Pending Publication Date: 2021-11-26
常熟常春汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the task of the present invention is to provide a method for improving the appearance of continuous fiber reinforced thermoplastic composite products, and to solve the problems of wrinkles and product edge burrs produced by continuous fiber reinforced thermoplastic composite materials during hot pressing and stretching

Method used

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  • Method for improving appearance of continuous fiber reinforced thermoplastic composite material product
  • Method for improving appearance of continuous fiber reinforced thermoplastic composite material product
  • Method for improving appearance of continuous fiber reinforced thermoplastic composite material product

Examples

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Embodiment 1

[0029] Example 1, please combine figure 1 As shown, the product involved in this embodiment is a composite material box body with flanges, and the box body part concave in the middle is stretched and formed under hot pressing. During the stretch forming process, the position of flange 1 is wrinkled due to the force in the in-plane direction, such as figure 2 shown. The specific method of improving the appearance of the folds in this embodiment is to determine the maximum height difference of the folds at the position of the flanging 1 when only the continuous fiber reinforced thermoplastic composite material 2 is used for thermocompression molding through preliminary experiments, assuming that the maximum height difference is 4mm. When designing the appearance and size of the product, please combine image 3 As shown, increase the thickness of flanging 1 so that the distance from the upper surface of flanging 1 to the highest point of the wrinkle and the distance from the l...

Embodiment 2

[0030] Example 2, please combine Figure 4 as shown, Figure 4 Shown is the edge of the part obtained by hot-pressing the pre-cut continuous carbon fiber / PP plain weave composite material sheet (hereinafter referred to as the carbon fiber / PP sheet) 4 . The carbon fiber / PP sheet 4 has a thickness of 1.5mm, and there are carbon fibers 5 sticking out at the cutting edge of the sheet. In order to remove the burr, when designing the product appearance size, an injection filling part 6 is reserved between the edge of the carbon fiber / PP sheet 4 after hot pressing and the edge of the finished product, so that the injection filling part 6 extends laterally from the carbon fiber / PP sheet 4 to The edge 7 of the finished product is provided with an injection molding cavity corresponding to the injection molding filling part 6 in the hot pressing mold formed by the carbon fiber / PP sheet 4 . During production, the carbon fiber / PP sheet 4 is heated to soften and sent into a hot-pressing m...

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Abstract

The invention discloses a method for improving the appearance of a continuous fiber reinforced thermoplastic composite material product. The method comprises the following steps: S1, when the appearance size of the product is designed, reserving an injection molding filling part at the position where a wrinkle appears after a composite material is hot-pressed, and enabling the injection molding filling part to completely cover the wrinkle; reserving an injection molding filling part between the hot-pressed edge of the composite material and the edge of the finished product, and enabling the injection molding filling part to transversely extend to the edge of the finished product from the composite material; S2, forming an injection molding cavity corresponding to the injection molding filling part in a hot-pressing mold for composite material forming; S3, heating a composite material sheet until the composite material sheet is softened, and feeding the composite material sheet into the hot-pressing mold; S4, carrying out hot-pressing molding on the composite material sheet through the hot-pressing mold, carrying out injection molding in the injection molding cavity at the same time, and bonding an injection molding material and the composite material sheet; and S5, taking out a product to obtain a finished product after mold-pressing injection molding is completed. The problems of wrinkles generated by material stretching and product edge burrs can be solved, and the development efficiency is improved.

Description

technical field [0001] The invention relates to a method for improving the appearance of a fiber composite product, in particular to a method for improving the appearance of a continuous fiber reinforced thermoplastic composite product. Background technique [0002] With the increasingly serious problems of global environmental pollution and energy shortage, energy conservation and emission reduction is an important issue in the automotive industry, and the requirements for lightweight auto parts are getting higher and higher. The OEMs mainly achieve the goal of lightweight vehicles through the optimization of structural design, lightweight materials and molding technology of lightweight materials. Due to its light weight and high strength, continuous fiber reinforced composite materials have become an important way to replace traditional metals to realize the lightweight of automobiles and their parts. [0003] At present, the molding of continuous fiber reinforced thermop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C70/42
CPCB29C45/14B29C70/42B29C45/1418
Inventor 陈正伟王惠添赵海斌傅浩
Owner 常熟常春汽车零部件有限公司
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