Introduction of the classification of FRP winding and forming process

Using the winding process to make FRP products has great limitations in the product type. Because the winding process is only suitable for the production of some cylindrical shape pipe, FRP purification tower, tank, septic tank and other products. This paper will introduce the classification of FRP winding molding process.
FRP winding molding process classification generally includes the following three: a, dry winding forming process simple dry winding molding process is mixed with resin material soaked glass fiber yarn drying at a certain temperature for a certain time, make it present a preliminary curing state, and then winding yarn into spindles, then production can be processed spindle directly according to the established arrangement of evenly staggered distribution on the mold.(FRP guardrail) the quality of the products using the legal system is relatively stable, the winding speed can be improved (up to 100~200m / min), the process is easy to control, the equipment is relatively clean, can improve the labor health conditions. This process method is easy to realize mechanization and automation. However, the production of the dry winding and forming process is relatively complex, and the initial drying time is not easy to grasp, so it is easy to appear that the external resin gel has been solidified, but the internal resin has not been solidified. This is also followed by the need to make the initially solidified fiberglass yarn into the spindles available for winding, which undoubtedly increases the complexity of the winding equipment.(What is FRP)
B, wet winding forming process The so-called wet winding forming process is that the prepared glass fiber yarn or glass fiber cloth and other reinforcing materials are first soaked in the resin mixed material, and then directly wound to the core mold or lining of the mold, and then heat the curing way to make the finished product.(FRP high pressure fan) Compared with the dry winding forming process introduced above, the production method of wet winding forming process is simpler, and the types of materials are very low, so different types of glass fiber materials can be used. However, because the glass fiber reinforced material needs to be wound immediately after soaking the resin, it will lead to some substandard glass fiber materials that cannot be removed, and may lead to a large number of bubbles in the later products. In order to ensure that the use of wet winding forming process can produce the quality of FRP products, it is necessary to be strictly controlled for each link in the winding process, such as rubber roller, tension controller, wire head and other accessories often need manual maintenance. These accessories are cleaned regularly to avoid the solidification and adhesion of glass fiber together in the production process, which will affect the production speed of the winding process.(FRP flame retardant fan)
C, semi-dry winding forming process compared with the dry or wet winding forming process introduced above, the semi-dry winding forming process will be more reasonable in production. First of all, it eliminates the preliminary glass fiber drying treatment in the dry winding process, and uses the semi-drying method to shorten the drying time, which can improve the working efficiency. Moreover, it can remove the volatile solvent contained in the resin mixture of the material to a certain extent, avoiding the problem of air bubbles in the later stage of the product. Moreover, optimizing the multiple treatment mode used in the dry winding process further reduces the production cost.(FRP centrifugal fan)
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