Method for manufacturing safety helmet and safety helmet manufactured with the same

Abstract

An improved lightweight, shock-resistant and tension-proof safety helmet manufactured at a low cost is provided. The safety helmet includes a shell, which is manufactured by molding a liner using a thermoplastic resin, covering the outside of the liner with a reinforced fiber sheet, preparing a mold, disposing the liner upside down on a concave molding side of the mold, injecting a thermosetting resin between the liner and the molding side, hardening the thermosetting resin, and detaching the hardened thermosetting resin from the mold; and a cushion pad attached to the inside of the liner. The safety helmet may include a guide surface referred to as a wind flap in order to guide external air into the safety helmet.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a safety helmet, such as a motorcycle helmet or a sports helmet, and a safety helmet manufactured using the method, and more particularly, to a method of easily manufacturing a safety helmet with a shell, which is made of a fiber-reinforced composite material including high-strength fiber, high elastic fiber, and a thermosetting resin, to be light and shock resistant at a low cost, and an improved safety helmet with excellent inner ventilation. BACKGROUND ART [0002] Safety helmets are used to protect human heads from being injured due to sudden accidents that occur when people drive motorcycles or racing cars or work in construction sites or special work sites. FIG. 1 is a cross-section of an example of a conventional safety helmet for motorcycles. [0003] Referring to FIG. 1, the conventional safety helmet 1 includes a shell 11 made of a fiber-reinforced composite material including high-strength fiber...

AI Technical Summary

Benefits of technology

[0007] The present invention provides a method of manufacturing an improved light, shock-resistant and tension-proof safety helmet at a low cost.

[0008] The present invention also provide a safety helmet which reduces unpleasantness by preventing a user's head from becoming clammy with sweat and eliminates bad sanitary conditions.

[0010] According to another aspect of the present invention, there is provided a safety helmet including a shell, which is manufactured by a method including molding a liner, which has an inner space and an opening at its lower portion in order to allow a user's head to be put into the safety helmet, using a thermoplastic resin; covering the outside of the liner with a reinforced fiber sheet formed using a textile or a non-woven fabric made of high-strength fiber and high elastic fiber; preparing a mold having a concave molding side and disposing the liner in the mold upside down such that the reinforced fiber sheet is positioned between the molding side and the liner; injecting a thermosetting resin between the liner and the molding side and hardening the thermosetting resin; and detaching the hardened thermosetting resin from the mold; and a cushion pad, which is attached to the inside of the liner in order to alleviate external shock to the user's head.

Problems solved by technology

However, this method requires a lot of expenses to manufacture the molds.

Moreover, when heat is applied to the molds in order to harden the fiber-reinforced composite material, the heat is not uniformly transmitted through the molds, so there is a large difference in strength throughout the shell 11.

However, this method is disadvantageous in that the thickness of the shell 11 is not uniform.

Accordingly, the safety helmet 1 causes the user to feel unpleasant and is harmful in terms of sanitation.

Moreover, when the user drives a motorcycle at high speeds, although the air can flow into the inside of the safety helmet 1 through the ventilation holes 31, the ventilation holes 31 cause the user to be exposed to a very loud wind sound, which disturbs the user's concentration on driving.

As a result, an accident may occur.

Images