Veneer

Veneer

Muaj ob hom veneer: txiav thiab sawn.
Sawn veneer yog siv rau kev tsim cov plywood rau lub qhov rooj, carpentry boards, thav duab, kev tsim kho, rooj tog zaum, thiab lwm yam. Veneer yog siv los npog cov ntoo ntawm cov tsiaj tsis muaj zog, cov laug cam ua los ntawm cov ntoo fibers, thiab lwm yam. 
Plywood boards muaj peb los yog ntau tshaj nyias txheej ntawm tev ntoo uas yog glued ua ke kom cov fibers ntawm ib tug yog perpendicular mus rau lub fibers ntawm lwm tus neeg.

Plywood boards yog tsim los ntawm birch, alder, tshauv, elm, Oak, beech, linden, aspen, ntoo thuv, spruce, cedar thiab fir. Cov txheej txheej txheej ntawm plywood hu ua cladding thiab cov txheej sab hauv hu ua nruab nrab. Thaum tus naj npawb ntawm cov khaubncaws sab nraud povtseg yog, ces ob txheej nruab nrab yuav tsum muaj cov kev taw qhia fiber ntau.
Raws li kev tiv thaiv dej, plywood yog tsim los ntawm cov npe hauv qab no: FSF plywood nrog nce dej tsis kam, uas yog glued nrog phenol-formaldehyde hom adhesives; FK thiab FBA - plywood nrog nruab nrab tsis kam mus rau dej, glued nrog carbamide los yog albumin casein glues; FB plywood nrog txwv dej tsis kam, nplaum nrog cov kua nplaum protein.
Nyob ntawm seb hom kev ua cov ntaub ntawv saum npoo av, plywood tuaj yeem sanded ntawm ib lossis ob sab thiab unsanded. Lub ntsiab qhov ntev ntawm plywood yog muab rau hauv lub rooj.

Table 3: Qhov loj me ntawm plywood, mm 

ntev (los yog dav) Tso cai deviations Latitude (los yog ntev)  Tso cai deviations
1830  5 1220  4,0
1525  5 1525  5,0 
1525  5 1220  4,0
1525  5 725  3,5 
1220  5 725  3,5

 

Qhov ntev ntawm ib daim ntawv ntawm plywood yog ntsuas nyob rau hauv cov kev taw qhia ntawm grain ntawm cov nplooj ntawv txheej.
Plywood yog tsim nrog lub thickness ntawm 1,5; 2,0; 2,5; 3; 4; 5; 6; 8; 9; 10 thiab 12 mm. Qhov tsawg tshaj plaws thickness ntawm birch thiab alder plywood yog txiav txim siab yog 1,5 hli, thiab rau lwm hom ntoo - 2,5 m.
Deviations ntawm unsanded plywood nyob rau hauv cov nqe lus ntawm thickness nyob rau hauv mm tau tso cai:
Rau plywood thickness nyob rau hauv mm 

  • 1,5; 2,0 thiab 2,5 - ± 0,2
  • 3,0 - ± 0,3
  • 4,5 thiab 6,0 - ± 0,4
  • 8,0; 9,0 thiab 10,0 - ± 0,4 txog 0,5
  • 12,0 - ± 0,6

Thaum sanding plywood, qhov txo ntawm nws thickness ntawm ib sab (saib rau hauv tus account tso cai deviations) yuav tsum tsis txhob ntau tshaj 0,2 hli, ntawm ob sab 0,4 hli.
Raws li qhov zoo, veneer rau plywood yog ua nyob rau hauv cov nram qab no hom: A, A1, AB, AB1, B, BB, C. Cov ntaub ntawv rau kev xaiv ntawm cov nplooj ntawv yog muab nyob rau hauv lub rooj. 4.

Table 4: Xaiv cov ntawv rau ntau hom plywood

Ntsev nplooj Ib hom plywood
A A1 AB AB1 B BB C
Nplooj hom
ntshauv A A AB AB B BB C
Rov qab sab AB B B BB BB C C


Symmetrically faib nyias txheej ntawm ntoo (raws li lub thickness ntawm plywood) yuav tsum yog tib hom ntoo thiab sib npaug thickness.

Plywood yuav tsum ruaj khov, tsis muaj npuas,
nws yuav tsum tsis txhob delaminate thaum khoov. Qhov kawg shear zog ib txheej ntawm cov kua nplaum yog muab rau hauv lub rooj. 5.  

Table 5: Qhov kawg shear zog ib txheej ntawm kua nplaum kg / cm(yam tsawg)

Lub npe ntawm plywood

Plywood nrog nce dej tsis kam

Plywood ntawm nruab nrab tsis kam mus rau dej Plywood nrog txwv tsis kam
Nrog carbamide kua nplaum Nrog albumin casein kua nplaum
Tom qab 1 teev nyob rau hauv boiling dej Tom qab khaws cia hauv dej hauv 24 teev  Hauv lub xeev qhuav Tom qab 1 teev nyob rau hauv boiling dej Hauv lub xeev qhuav

Birch ...

Alder, beech, linden, tshauv, elm, oak, fir, ntoo thuv, spruce thiab cedar ...

Jasikova...

12 12 12 5 12
10

10

10

6

4

3

10

6

 

Kev xa khoom ntawm plywood raws li qhov ntev, chav kawm, hom, hom ntoo, kev taw qhia ntawm cov ntoo fibers hauv cov nplooj ntawv thiab cov txheej txheem ntawm kev ua haujlwm yog ua raws li cov neeg siv khoom tshwj xeeb.
Sanded plywood yog tau los ntawm sanding ntoo ntawm cov tshuab tshwj xeeb rau sanding plywood thiab yog siv los npog cov khoom siv ntoo.

Sanded veneer muab faib ua radial, semi-radial, tangential thiab tangential - pem hauv ntej, uas tau los ntawm cov ntoo stumps (table 6).

Table 6: Cov yam ntxwv ntawm ntau hom plywood

Ib hom hlaws dai                                       Cov yam ntxwv nta
            los ntawm xyoo              los ntawm core rays
Radial Lub xyoo muaj cov tsos ntawm cov kab ncaj, kab sib npaug Core rays nyob rau hauv daim ntawv ntawm transverse bands nyob rau ntawm tsawg kawg yog 3/4 ntawm lub phaj nto
Semi-radial Qhov no Core rays nyob rau hauv daim ntawv ntawm oblique los yog longitudinal kab txaij nyob rau ntawm tsawg kawg yog 1/2 ntawm lub phaj nto
Tangential Cov stems uas tsim lub cones loj hlob muaj cov tsos ntawm oblique bands los yog kab Core rays muaj cov tsos ntawm longitudinal los yog oblique bands los yog kab 
Tangential - frontal Tau ntau xyoo, lawv muaj cov tsos ntawm cov kab nkhaus kaw los yog bands Core rays muaj cov tsos ntawm cov kab nkhaus los yog bands

Raws li qhov zoo ntawm cov ntoo, plywood muab faib ua peb chav kawm: I, II thiab III. 

Veneer yog tsim los ntawm ntoo qhib, beech, walnut, chub, maple, tshauv, elm, chestnut, sycamore, Amur velvet, pear, kua, poplar, Cherry, acacia, birch, elm thiab hornbeam.

Qhov ntev ntawm radial, semi-radial thiab tangential veneers mus ntawm 1,0 m thiab ntau dua; tangentially - frontally - los ntawm 0,3 mus rau ntau nrog nce ntawm 0,1 m.

Lub thickness ntawm veneer yog rau txhua hom - 0,8; 1,0; 1,2; 1,5 hli.

Table 7: Dav ntawm cov ntawv rau plywood ntawm ntau hom, mm

Ib hom veneer Thiab chav kawm II chav kawm III chav kawm
Radial, semi-radial thiab tangential 130 100 80
Tangential - frontal 200 150 100

Deviations los ntawm cov ntawv sau thickness qhov ntev (hauv mm) raug tso cai:

  • Rau veneer thickness 0,8 hli - ± 0,05 
  • Rau veneer thickness 1,0 hli - ± 0,08
  • Rau veneer thickness 1,2 - 1,5 hli - ± 0,1

Cov av noo ntawm veneer yog 10 ± 2%.

Nyob rau hauv cov nqe lus ntawm ntoo zoo, veneer yuav tsum tau raws li qhov yuav tsum tau ntawm cov txheej txheem uas twb muaj lawm. Cov nplooj ntawv veneer yuav tsum muaj lub ntsej muag huv si, tsis muaj roughness, khawb, tawg thiab hlau stains.

 

 

Cov lus hais txog

Flaws ntawm ntoo

Flaws ntawm ntoo

Ntoo qhov hnyav thiab av noo

Ntoo qhov hnyav thiab av noo

ntoo

Ntoo thiab nws cov khoom