8. Veneer
scarf-jointing line
-
veneer sheet size - input 1300 / 1600 x 1300 / 1600 mm
output 2550 / 3150 x
1300 / 1600 mm
-
veneer sheet thickness – min 1,2 mm max 3,6 mm
Plywood
production area
1. Glue kitchen
- glue mixer
- ready glue tank ( 8 m3 )
- wash water tank ( 8 m3 )
- piping system and transferring
pumps
- resin tanks ( 2 pcs, each 50 m3 )
2. Glue
spreaders ( 2 pcs )
- vacuum automatic veneer feeder
- 4-roller glue spreader
- powered pivoting truck to
transport the billet stack from two lay-up lines to the pre-press
3.
Pre-press
|
4. Hot press (
25 openings )
- capacity 6.7 m3/h finished
panels
- phenolic glue
- platens size 3200x1900x50 mm
- plywood panel thickness ( basic
) 15
mm ( 11 ply )
- estimated pressing cycle 11.0
min
- min/max plywood thickness 4.0
mm / 40
mm
- specific pressure on 80%
surface 20
kg/cm2
|
|
|
5.
Plywood puttying line
- plywood panels in vertical
position
|
6. Plywood
squaring line
- basic plywood panel thickness
15 mm
- capacity 7 panels/min
- automatic panel feeder
|
|
|
7.
Sanding line
- basic plywood panel thickness
15 mm
- standard working speed 25 m/min
- opposed calibrating and sanding
rollers 2+2
- mirror
- 3 stacking stations
-
ultrasound blown and unglued board detection system
|
|
|
8.
Dry wood waste handling
plywood squaring stripes: collecting box
|
Logistics
6 gas forklifts ( 1 pc: 3 tons, 4
pcs:
5 tons, 1 pc: 6 tons )
are used for material and ready products
transportation inside the mill.
 |
|
Thermic
station plant and silos
Two boilers are used, each 8 Mw ( gas
boiler and chips boiler ).
Three chips collecting bunkers are
constructed, each 400 m3.
Maintenance
2 maintenance rooms with equipment (
possible to make: grinding, main machines repairing, drilling,
milling and etc ).
Other
existing equipment,
mechanisms and units
- temperature
regulation unit
- pipes, insulation, cocks, valves,
pumps and connections between dryer, press and the a.m. plant
- pipelines for humid air exhaust
outside the dryer and for air humidity normalisation system
- setting of connections between
heat transferring fluid feeding pipe and batteries for the dryer
- gas suction hood and relevant
aspirator over the press
- air compressor and
pneumatic connections to the machines
- water piping
- ladders and gangways
-
perimetral protection for the machines and the lines.
Appendix. Basic
parameters.
1.Raw material
|
Wood species
BIRCH
logs suitable for plywood production,of
good quality and regular shape, heat-treated.
Possibility
to process other
species like Pine, Aspen.
Log
diameter
min 160 mm.max
800 mm average 236 mm debarked
Log
length for cross-cutting/debaeked min 1300 mm.
max 5500 mm
Log
length for peeling
min 130 mm. max 270 mm. basic
1320-1620 mm and addtionally 2540 mm
|
2.Plywood
panel
|
Panel size
1220 x 2440 mm 4' x 8'
1525 x 3050 mm 5' x 10'
1525 x 1525 mm 5' x 5'
and
addtionally
2440
x 1220 mm 8' x 4'
Veneer
thickness range min 1 mm. Max 4 mm
Plywood
thickness range min 4 mm. max 40 mm
Glue
bonding Phenolic
glue 32.5 days/yers |
3. Working time
|
312.5 days/year 3
shifts/day 8 haurs/shift 750 hurs/yers(2 shifts/day for
plywoodfinishing = 5000 hourd/year
|
4. Effective working time
|
80%; 90% for drying and plywood
pressing
|
5. Rated capacity-plywood
|
|
|
Mill
flow-Birch
m3/year
m3/h
% Recovery
Blocks to
peel/debarked
134.784
18
100,0
Green veneer
78.175
10,4 58
Dry veneer
71,139
9,5
52,8
Plywood finished-sanded
50000
6,7
37
Basic
plywood panel
size
30% - 4' x 8'
-
1220 x 2440 x 15 mm - 11 ply
50%
- 5' x
10'
1525 x 3050 x 15 mm - 11 ply
20% - 5' x
5'
1525 x 1525 x 15 mm - 11 ply
Basic
veneer sheet
size
1300/1600 x 1400/3600 x 1.5 mm
Numbers
of plywood
panel/hour
30% - 4' x 8' x 15 mm - 2,0 m3/hour - 45 panel/hor
50 % - 5' x 10' x 15 mm - 3,4 m3/hour - 49 panel/hour
20% - 5' x 5' x 15 mm - 1,3 m3/hour - 37
panel/hour
_____________________________
6,7 m3/hour - 131
panel/hour
|
