MOULD FOR PRESSURIZED MANUFACTURE OF LARGE-SIZED ARTICLES OF POLYMER Russian patent published in 2003 - IPC

FIELD: moulds for manufacture both of single and serial production of large-sized articles: vessels, baths, spouts, rings, ducts of various configurations, reinforced, with stiffening ribs of polymeric material. SUBSTANCE: the mould consists of a base plate, molding members, mould cavity and fastening components. The mould is made in the form of an inner and outer half-mould consisting of separate mould-shaping members rigidly connected to each other. It is additionally provided with vertical and horizontal outside and inside trusses located around the edges of outer and inner half-moulds and a drive device. The vertical inner and outside trusses are installed for turning relative to the base plate. The horizontal external trusses are rigidly connected to the vertical external trusses, and the internal horizontal trusses are made detachable and are hinge-joined to the vertical internal trusses, between each other and the drive device are connected through a slide joint. Sprue channels connected to the molding cavity are made on the opposite sides in the external half-mould. The internal vertical trusses are provided with lugs and grooves are made corresponding to them on outside of the inner half-mould for their fixation. The inner half-mould is installed on the base plate for vertical movement, and the outer half-mould is rigidly secured on the base plate by catches. The base plate is rigidly attached to the foundation. The quantity, size and configuration of separate mould-shaping members correspond to the sizes and configuration of the article. EFFECT: enhanced reliability, strength characteristics, simplified servicing at a high quality of execution. 4 cl, 4 dwg