METHOD OF PRODUCING HOLLOW ARTICLES FROM COMPOSITE MATERIALS Russian patent published in 2013 - IPC B29C41/22 

FIELD: process engineering.

SUBSTANCE: invention relates to forming structure from polymer composites intended for construction of pre-engineered arch bridges, tunnels, hangars and the like. In compliance with this method, inflatable inner shell is filled with gas to plane reinforcing filler and binder thereon. Extra outer shell of band-like resilient material is applied on reinforcing filler with binder to harden the binder and to remove inner and outer shells. Inner shell represents a forming component is made of resilient material arranged calibrated elastic hose. Prior to placing reinforcing filler on inner shell it is arranged on berth to shape the article as required. Used binder represents polymer composition of cold hardening. Reinforcing filler is impregnated with binder after its placing onto shell inner surface. After binder curing and removal of extra outer shell next layers are formed from reinforcing filler and binder unless required thickness of hollow articles is made.

EFFECT: production of preset-curvature constant-diameter long-sized articles.

6 cl, 1 dwg, 4 ex