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Pultrusion fiberglass Laying, fiberglass Joining Operation Steps and Essentials

Fiberglass laying refers to placing the reinforcing material on the fiberglass rack and drawing out these materials as per design requirements. Only when the reinforcing materials are correctly positioned can the smooth progress of pultrusion production be ensured, and the comprehensive performance of the pultrusion products can be utilized to achieve the design objectives of the products. The main equipment for completing this process is the fiberglass feeding device, which includes a fiberglass rack and a bundler. There are two ways to draw fibers from the fiberglass rack: internal retraction and external retraction of fibers. In the former, the fiberglass cylinder is stationary on the fiberglass rack, and drawing fibers from the inner wall inevitably causes twisting, which is the method mostly used for glass fibers. In the latter, the fiberglass cylinder is placed on a rotating core shaft, which can prevent the twisting of fibers. This method is suitable for special fibers such as carbon fibers and aramid fibers. Regardless of the method used, one principle must be followed when threading the fiberglass: no matter how many bundles of fibers are to be threaded on a single layer of the fiberglass rack, the drawn fibers must not tangle with each other and must remain strictly independent and non-interfering. This ensures the continuous production process without interruptions caused by fiber knotting and disordered fiberglasss. After being drawn from one side of the fiberglass rack, the fibers enter the next production process through a special fiberglass guiding ring.

To improve the transverse performance of pultruded products, various forms of fabrics are also drawn from the raw material rack into the impregnation process. These include stitched mat, needle-punched mat, surface mat, multi-axial fabrics mat, continuous mat, etc.

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