The sticker-stacker is used to build packets for the following drying process. An automatic sticker inserts dry sticks between the lumber layers. The lumber pieces are placed in turns to the left and right in the layer to achieve the same packet length regardless of dimensions, in order for the kilns to fill optimally and consequently gain as favourable conditions as possible for the drying process. The sticks are placed in rows at right angles to the lumber pieces in rows above each other which is important for the stability in the package. Stable packets are important for the following processes.
- Stable packeges
- Sticks lengths directly above one another
- Same packet lengths with double end-levelling
- Supreme capacity
- Robust construction
- Tried and tested technology
- Creates optimal conditions for the following drying process
The sticker-stacker can consist of different machinery units, here is one example:
ROLLER STATION THREADED STACKER 2924
A split chain conveyor receives timber from lateral transportation. A split enables an operator to slow up the first conveyor to ease work in correcting lumber pieces. Subsequently the lumber pieces are end-levelled in a roller station, before being further transported in a lateral direction. The roller station consists of driven offset rollers that end-align the timber pieces against a rotating stop screen.
BUFFER REGULATOR CONRAD 2195
A chain conveyor with an integral belt conveyor receiving lumber pieces that are transported onwards in a lateral direction towards the single-piece feeder. The optimisation of the forwarding speed of lumber towards the single-piece feeder consists of photo-cells and software that measure the relationship between air and lumber in the volume that comes over the conveyor and automatically adjusts the speed to enable the maximum degree of occupancy on the in-feed table. The integrated conveyor optimises the lumber flow towards the single-piece feeder.
SINGLE-PIECE FEEDER TURBO 2540
From a lumber layer fed at a constant pressure against a fixed stop on a flat chain conveyor, single lumber pieces are fed by underlying pneumatically controlled conveyor flaps that raise the timber piece to be fed towards overlying driven conveyor flaps. At the same time as the timber piece is lifted over the fixed stop edge, it is clamped between the pair-mounted conveyor flaps, and is fed onto a carrier in the following carrier conveyor. The other conveyor flaps can be electrically (actuated) raised or lowered, and at the same time have a pneumatic spring system function.
END LEVELLING SECTION DOUBLE ROUTING 2343
Underlying driven rollers end-level the timber pieces against fixed stop screens during transportation. The chain conveyor's chain is fitted with carriers at two levels. At the first roller station all the timber pieces are end-levelled against a dampened stop screen. At the second roller station every second timber piece is guided over to the opposite side, to be end-levelled against a second fixed dampened stop screen.
STACKING SECTION STICKER-STACKER 2901
The timber pieces are transported piecemeal by a carrier-fitted chain conveyor onto a layer build-up conveyor, which on becoming full, accelerates forwards so that a new layer can be started. When a full layer assumes the correct position, the layer is raised by articulated stacker forks that transport it onto the packet elevator where it is lowered, the forks return and the layer is pulled off and positioned on the packet elevator's brackets. The work cycle is repeated until the correct number of timber pieces are on the packet elevator. When a packet is full, the packet elevator is lowered and the packets are transported out.
||Max. 16 layers /minute (depending on dimensions)
||2901, 2902, 2341, 2343, 2540, 2195, 2924
||Single routing of the timber.
Possibility of two different packet lengths.
Layer spreading when laying varying widths in the same packet.
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