Exam timber processes Flashcards
Tools for steam bending
Steam box
Steam or heat gen
thermometer
hose
t must steam bixe be made of
pvc pipe
why must steam boxes be made of pvc pipe
compeltley encase wood so steam can penetrate full length
steam bending steps
timber placed in sealed box (pvc tube)
steam fed into the box via a pipe from steam box
steam penetrates timber
timber is pliabale
timber removed
set around a former using clamps
what to include in diagram
steam box
pipe for steam
sealed pvc tube
water hole
valve
clamp aroudn former
qc in steam bending
sacrficie wood when around former
shelves in steam box
pressure valve
water hole
guides and markings of former to ensure accurate curve
adv of steam bending
aethtic appeal
most effectiev method of bending wood
doen with simple equip p
goo dstrength to weight ratio parts
connected to make any shapes
no joining needed
low power consumption
strong flexibel designs
dis adv of steam bending
only high quality timebrs shoudl be used
nto the most accurae and precise
bend radius depends on timber used
what is wood laminaing
multipel sheets fo wood veneers formed using moulds and then bonded using strong adheisves
what does wood laminating produce
stong, rigid, light weight structure
process fo lamianting
thin veneers
adhesive applied
adesives lauyered up
clamped in adie
adhesive dries
what is the die look liek for lamianting
a sanddwhich
male and female part
timber in middle
how to draw wood lamination diagram
former
wood in between aletranting grain directions
each layer glued
clamped together
make shape
what are the veneers in wood lamination
very thin
materials used in lamination
birch
plywood - flexbible
why birch used
strong
flexible when thin
durable
adv of laminating
range fo thciknesses
strong lightweight components
can be combiend wiht other materials to enhacne proeptire s
scale of laminating
one off
batch
mass
cons of laminating
many steps
restricted to bends in signle direction
are the number of veneers used in lamianiting odd or even
odd so grain same directio
quality control for forming
high quality contact sirface
plastci film tp [rpdicy oulds from spillahe
how vaccum lamianting work
same as vacc forming jst for wood
diagram for vacc lamianting
High densitiy polysere mould
laminates gled and placed on surface
sealed pvc bag
air extraction
bed designed for air removal
what is kefing
close saw cuts to allow shit to bend
kerfing step by step
slot or grooves in board
not cut all the way through
after wood is kerfed then what
thin laminate on cut side to hodl it together
materials used in steam beding
hardwoods
beech
oak
why beech and oak used for steam bending
pliable
