Composite gas cylinder and molding method thereof

Abstract

The invention provides a composite gas cylinder, which comprises a plastic liner, a metal bottle head embedded in the end of the plastic liner, and a winding layer wound on the outer wall of the plastic liner. The plastic liner includes an inner layer of the inner liner and a reinforcement layer formed on the outer wall of the inner layer of the inner liner, and the end of the inner layer of the inner liner is integrally formed with the metal bottle head. The material of the inner layer of the liner is thermoplastic resin, the material of the reinforcing layer is fiber reinforced thermoplastic resin; the material of the winding layer is fiber reinforced epoxy resin. The composite gas cylinder of the present invention increases the bonding strength between the reinforcing layer and the inner layer of the liner by increasing the bonding strength between the reinforcing layer and the wrapping layer, thereby enhancing the bonding and bonding between the wrapping layer and the plastic liner Force, thereby increasing the connection strength of the connection between the metal bottle head and the plastic liner, ensuring the synchronization of the displacement of the metal bottle head and the plastic liner, thereby improving the quality of the composite gas cylinder.

Description

technical field [0001] The invention relates to the technical field of pressure vessels, in particular to a composite gas cylinder and a molding method thereof. Background technique [0002] In order to keep up with the ever-increasing pace of environmental protection requirements, domestic new energy and clean energy technologies have also made great progress. In the field of energy storage and transportation equipment, more and more attention is paid to the type IV plastic liner fully wound composite material cylinder with higher bulk-to-weight ratio and corrosion resistance. Consumers are also very fond of such products. [0003] Most of the current plastic liner fully wound composite material gas cylinders adopt a three-layer structure of an inner liner layer, a winding layer and an outer protective layer. The material of the bladder layer is plastic, and the metal bottle head and the head of the inner bladder layer are first formed by injection molding, and then the h...

AI Technical Summary

Problems solved by technology

Regardless of whether it is formed by rotational molding or injection molding, the inner liner layer of the molded composite gas cylinder will deform greatly under high pressure, which will easily cause the deformation of the metal bottle head and the inner liner layer to be out of sync, and then make the metal bottle head and the inner liner The interface of the layer peels off, causing the cylinder to leak

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