Manufacturing method of partially cured Z-pin
A fully cured, z-pin technology, applied in the field of composite material manufacturing, can solve the problems of Z-pin easy to pull out, incompletely cured Z-pin, etc., to achieve the effect of increasing pultrusion speed, lowering temperature and reducing energy consumption
Active Publication Date: 2013-11-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0003] The purpose of the present invention is to improve the deficiencies of existing Z-pin manufacturing techniques and methods, and provide a manufacturing method for incompletely curing Z-pins to strengthen the chemical combination between Z-pins and reinforced laminates and solve the problem of Z-pins. The problem that the Z-pin is easy to pull out when the pin reinforced composite material is loaded
Method used
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Embodiment Construction
[0026] This example illustrates the preparation method of the incompletely cured Z-pin provided by the present invention.
[0027] (1) Install the T300 fiber bobbin on the attached figure 1 The yarn unwinding device in the middle is controlled by the tension of the yarn bobbin to ensure that the glue is fully dipped. fibers passing through the figure 1 Fiber guides, dipping devices, molds and post-baking tunnels. There is low-viscosity resin in the glue tank, and the glue tank can be heated to reduce the resin viscosity. The resin-impregnated fibers are preformed in the mold, and at the same time, the cross-linking reaction begins. The temperature of the post-drying tunnel is the key factor to control the degree of curing, and the curing reaction mainly occurs in the post-drying tunnel. Finally, it passes through the traction device, and the traction is provided by two pairs of tangential rubber rollers.
[0028] (2) Select two groups with 70% and 100% curing degrees ac...
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Abstract
The invention relates to an implantation method of a partially cured composite material Z-pin. The method is characterized in that: 1. the process consists of manufacturing and implantation of partially cured Z-pin; 2. the manufacturing process includes establishing a preparation parameter database of partially cured Z-pin, and each record of the database includes a Z-pin material, preparation parameters, a curing degree and modulus of the prepared Z-pin; the relation between a smallest Z-pin modulus needed for implantation of a selected prepreg material and the modulus scope of partially cured Z-pin in the above database is calculated so as to choose appropriate manufacturing parameters; 3. freezing treatment is conducted to the Z-pin which does not meet the implantation requirement in terms of rigidity. The Z-pin has a low initial curing degree, and when implanted into the prepreg, the Z-pin and the matrix resin of the prepreg can undergo a crosslinking reaction during curing, and a strong chemical bonding force can enhance the chemical bonding strength between the Z-pin and a panel. Compared with completely cured Z-pin reinforced composite materials, the Z-pin reinforced composite material of the invention has substantially improved mechanical property.
Description
Technical field [0001] The invention relates to a method for manufacturing a composite material Z-pin, which is characterized in that it is incompletely solidified, and belongs to the technical field of composite material manufacturing methods. Background technique [0002] The Z-pin technology is to implant the needle-like thin Z-pin into the laminated prepreg to form a three-dimensional reinforcement, and the overall structure is formed by co-curing. See the reference "Review of Z-pinned composite laminates" (Mouritz A P, Application Science and Manufacturing, 2007, 38 / 12). This technology can significantly improve the interlayer toughness of composite laminates, and has the characteristics of simple operation, strong designability and easy integral molding. It has broad application prospects, especially in aerospace, and has the potential to replace metal materials. However, according to the current literature reports and test results, when the Z-pin reinforced composite...
Claims
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IPC IPC(8): B29C70/28B29C70/54
Inventor 还大军张向阳齐俊伟文立伟王显峰李勇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS