DEVICE FOR PRESSING OF SHELL BILLETS Russian patent published in 2010 - IPC B27N3/08 

FIELD: technological processes, woodworking.

SUBSTANCE: invention is related to woodworking industry, namely to equipment for pressing from wood-fibre mixtures of thin-walled items arched in cross section with cylindrical surfaces. Device comprises several matrices and three pressing units, which are assembled pairwise in three tiers between cross beam fixed on stands and power hydraulic cylinder installed on foundation. In working position between matrix and pressing unit of each tier there is item stock arranged. Pressing unit is arranged in the form of two hingedly joined arched sidepieces with hinged supports for rods fixed on them, which create groups distanced along longitudinal axis of billet, and each group is arranged from elements of vertical rod, which is fixed under above arranged matrix, and pairs of rods inclined to vertical line, which are hingedly joined to sidepieces and upper plate of unit. Besides composite elements of vertical rods are spring-loaded versus sidepiece and are connected to each other with the possibility to change common length of rods. Hydraulic drive of device comprises power hydraulic cylinders, pipelines, tank for pumped working medium, manometre, hydraulic pump of low and high pressure, two-position hydraulic distributors, hydraulic accumulator with filling from elastic elements and pressure relay, which are installed on discharge pipeline. Auxiliary hydraulic cylinders are installed on base, and their plungers bear matrices of upper tiers, and hydraulic drive is arranged with pneumatic hydraulic accumulator, which is connected by means of pipeline to specified auxiliary hydraulic cylinders.

EFFECT: invention provides for reduction of labour expenses, power inputs for unit of produce and high efficiency with provision of high quality of produce.

2 cl, 5 dwg