TW229144B - An improved method for making safety helmet - Google Patents

Abstract

An improved method for making safety helmet, which mainly comprises upperouter shell, lower outer shell and foam buffer, in which the upper and lowerouter shells are pre-fabricated by vacuum molding technique, the foam bufferis made by a high temperature steam manufacturer; the method is characterized in that: the manufacturer is mainly comprised of upper and lower high temperaturesteam chamber, the steam chamber is equipped with male and female molds toform the desired helmet shape, the mold is equipped with steam holes (thesize of the hole is smaller than the foaming particles), there is a feedinghole installed on top of the male mold, the feeding hole is an automaticopen-close window, when the foaming particles are injected through thefeeding gun, the particles will rush open the feeding hole and enter themold to be foamed, thereafter the feeding hole will automatically close,high temperature steam, through high temperature steam pipe, enters thesteam chamber and foams the foaming particles through the steam holes; afterthe formation of the foaming buffer with helmet shape, the foaming buffer isplaced under the outer shell and clamped by the upper outer shell to form amodel; then the model is placed in the same set of foaming molds to undergosecondary foaming; when the safety helmet model is inserted into the malemold, the female mold presses down by the action of the steam chamber; whenthe male and female molds close, high temperature steam is used to undergobuffer secondary foaming, after the secondary foamed buffer cools off theupper and lower shells will be tightly closed without any gap.