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

FIELD: process engineering.

SUBSTANCE: invention relates to woodworking industry, namely to equipment intended for pressing wood-fiber mixes. Proposed device comprises counter die arranged on the base and pressing assembly mounted on crossarm driven along vertical to interact with blank arranged in said counter die. Note here that said pressing assembly represents two arc-like side members pivoted together that carry hinge supports for rods that form groups spaced apart along blank lengthwise axis. Each said group is made from build-up vertical rod elements secured on said crossarm and pivoted to side member via a pair of rods, and a pair of rods inclined to vertical and pivoted to crossarm and side members. Said build-up elements of vertical rods are jointed together by screw joint to allow variation of rods total length. Device comprises also hydraulic drive including power cylinders jointed with crossarm, pipelines, pressure pipeline running to said power cylinders, circulation work fluid tank, check valves, hydraulic accumulator, hydraulic pump and system of pipelines with power cylinders control hardware. Aforesaid hydraulic drive has hydraulic accumulator communicated via pneumatic line with compressor, and two stage work fluid pressure booster, that are connected with hydraulic pump, power cylinders and hydraulic accumulator. For semi-automatic control, pipelines are furnished with two-position hydraulic control valves and work fluid pressure relays. Besides device pressing assembly crossarm is provided with auxiliary hydraulic cylinder communicated via pipelines with extra three-position hydraulic control valve and pneumatic-hydraulic accumulator for remote control of vertical rod length variation.

EFFECT: reduced labor input, electric power consumption, higher efficiency and quality.

2 cl, 4 dwg