Production method of preimpregnated thermoplastic resin structure

Abstract

The invention discloses a production method of a preimpregnated thermoplastic resin structure, which comprises the following steps of: respectively carrying out microgelled baking on continuous reinforced fiber cloth soaked with different thermoplastic resins or continuous reinforced fiber plates stitched with plane material sheets; cutting to form tabulate continuous reinforced fiber plates or continuous reinforced fiber plates stitched with the plane material sheets; stacking a plurality of continuous reinforced fiber plates and continuous plane material plates; and heating and stitching byan oil pressure hot press to form a continuous reinforced fiber lamination body. The continuous reinforced fiber lamination body can be combined with other assemblies to form a continuous reinforced fiber lamination body structure with a required shape by further matching with intramode secondary injection molding.

Description

technical field [0001] The invention relates to a method for manufacturing a continuous reinforced fiber cloth structure pre-impregnated with thermoplastic resin, especially the continuous reinforced fiber that can be perfectly combined with the complex structure required by the design through secondary injection molding in the mold by using thermoplastic resin Laminated structure molded product. Background technique [0002] With the global issue of "energy saving and carbon reduction" and the rapid development of mobile information technology products, the industry has begun to pursue materials that are more impact-resistant, anti-electromagnetic, and can be recycled and reused to reduce the amount of petrochemical resins. In order to meet global standards Environmental protection requirements and the needs of related industries. [0003] At present, the continuous reinforced fiber laminates used in the casings of IT products in the composite industry are mostly pre-impre...

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Problems solved by technology

[0005] In the prior art, when the fiber accumulation layer is heated and pressurized in the mold, the prepreg resin will be crystallized and hardened due to pressure, temperature or time difference, causing a part of the resin amount between the fibers to be insufficient to cover all the fiber surfaces or Filling the gaps between the fibers makes the surface of the molded product concave, which not only causes a lack of appearance, but also affects the structural strength

In order to improve the above-mentioned defects, the concave parts of the molded products need to be filled with soil, painted and polished to meet the appearance requirements, but it is time-consuming and labor-intensive. The dust caused by polishing and polishing is also likely to cause pollution, which requires a lot of labor costs but is difficult to mass-produce. Production

[0006] In addition, most of the existing technologies use thermosetting epoxy resin as the pre-impregnated resin, which requires a very long man-hour to complete the curing process of crystallization, cooling to hardening and molding, which consumes a lot of power and energy. , when combined with any material, it is necessary to coat the interface solvent resin to improve the bonding force, thus causing additional manufacturing costs and production defect rates in subsequent applications

[0007] What's more, with the high awareness of environmental protection, thermosetting resins cannot be recycled and reused, which is always a doubt and obstacle, especially when the impregnated resin of epoxy resin is discarded, it can only be crushed and buried or mixed into ready-mixed soil for research. , cannot be burned, because the poisonous gas will be produced during the burning process

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