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There are various modes of carbon-fibre-reinforced polymers manufacturing process, which depend on the final product being created, the finish (outside gloss) required, how many of this particular products are to be produced. The choice of matrix can have a profound effect on the end-product's properties.
Molding is a process of layering sheets of carbon fibre cloth in to a mold in the shape of hte final product. The choice of the alignment and weave fo the cloth fibres conditions the strength and stiffness properties of the resulting material. the mold is then filled with epoxy and is heated or air-cured. The resulting part is very corrosion-resistant, stiff, and strong for its weight.
For simple pieces or if only few copies are needed a vacuum bag can be used. a carbon fibre or aluminum mold is covered with a release agent, then the fabric and resin are applied, and the vacuum is pulled and set aside to allow the piece to cure (harden). The resin may be either applied to the fabric before it is laid in the mold and placed in the bag or with a use of a resin induction system, where the vacuum pulls resin into the bag through a small tube onto the dry fabric in the mold. The third method of dry layup uses the carbon fibre material which is already impregnated with resin (prepreg) laid into the mold onto adhesive film. The dry layup method has the least amount of resin waste and can achieve lighter constructions than wet layup.
In this case the two-piece mold is bolted together with the fabric and resin between the two. Thus when mold is bolted together, it is relatively clean and can be moved around or stored without vacuum until after curing.
This technique is usually applied for manufacturing composite materials of cylindrical form. The carbon fibre filaments simultaneously coated with synthetic resin are wound under varying amounts of tension over a mould or mandrel. Once the mould is covered to desired thickness, it is placed in an oven to set the resin. When the resin has cured, the mould is removed, leaving the hollow final product.