Helmet forming process

Abstract

The invention discloses a helmet forming process and aims to provide a forming process which can effectively increase the integrity and continuity of a helmet and can effectively improve the integral strength of the formed helmet. The helmet forming process is suitable for molding and forming of an exercise helmet. The helmet forming process comprises the following steps: impregnating the whole bundle of continuous fiber yarns; drying the impregnated yarns and then cutting into the shape of an unfolded helmet; laminating and folding the cut yarns; placing the laminated yarns into a preforming mold, and prefabricating blanks; placing the blanks into the forming mold, assembling the mold, feeding into a hydraulic furnace base, heating so as to fuse epoxy resin and mixing with fibers; then curing, and combining with fibers, thus preparing the helmet. The helmet forming process provided by the invention has the beneficial effects that the helmet structure has integrity, is improved in the density due to application of pressure; yarns at the part with high strength requirement are folded and laminated; the integral-structure material is good in uniformity, and the strength of the formed helmet is high.

Description

technical field [0001] The invention belongs to the field of sporting goods manufacturing, and in particular relates to a helmet molding process. Background technique [0002] Sports helmets, such as bicycle helmets, extreme sports helmets, etc., belong to a category of sporting goods. The helmet can reduce or avoid damage to the head when it is hit by an external force. When an accident occurs, it can be used as a buffer between the collision object and the head, which can effectively reduce the damage to the head from the outside world. Current helmets are manufactured using injection or pressure molding. In injection molding, use an injection molding machine to melt high-temperature PVC, nylon or raw materials mixed with short-fiber nylon, etc., and then inject them into the mold for molding. Heavy, poor strength; when pressure molding, glass fiber felt or fiber cloth is spread in the helmet mold, and then polyester resin or epoxy resin is injected into the mold, and pr...

AI Technical Summary

Problems solved by technology

In injection molding, use an injection molding machine to melt high-temperature PVC, nylon or raw materials mixed with short-fiber nylon, etc., and then inject them into the mold for molding. Heavy, poor strength; during pressure molding, glass fiber felt or fiber cloth is spread in the helmet mold, and then polyester resin or epoxy resin is injected into the mold, and pressure is applied for molding. This process method, Although less costly and quicker to manufacture, due to discontinuity in the fibers there is a significant loss of fiber strength resulting in a less strong final product

Therefore, the current sports helmet manufacturing process is still lacking in the protection and improvement of helmet strength.