Ho na le mefuta e 'meli ea veneer: sehiloeng le sawn.
Sawn veneer e sebelisoa bakeng sa tlhahiso ea plywood bakeng sa mamati, mapolanka a mapolanka, liforeimi, meaho, thepa ea ka tlung, joalo-joalo. Veneer e sebelisetsoa ho koahela lehong la mefuta e fokolang, mapolanka a entsoeng ka likhoele tsa lehong, joalo-joalo.
Liboto tsa plywood li na le likarolo tse tharo kapa ho feta tse tšesaane tsa lehong le ebotsoeng tse khomaretsoeng hammoho e le hore likhoele tsa lehong le le leng li tobane le likhoele tsa tse ling.
Mapolanka a plywood a entsoe ka birch, alder, molora, elm, oak, beech, linden, aspen, phaene, spruce, kedare le fir. Likarolo tse ka ntle tsa plywood li bitsoa cladding 'me tse ka hare li bitsoa bohareng. Ha palo ea lihlopha e lekana, joale likarolo tse peli tse bohareng li lokela ho ba le tataiso ea fiber e bapileng.
Mabapi le ho hanyetsa metsi, plywood e entsoe ka lihlahisoa tse latelang: FSF plywood e nang le ho eketseha ha metsi ho thibela metsi, e khomaretsoeng ka li-adhesives tsa mofuta oa phenol-formaldehyde; FK le FBA - plywood e nang le khanyetso e mahareng ho metsi, e khomaretsoeng ka carbamide kapa albumin casein glues; FB plywood e nang le khanyetso e fokolang ea metsi, e khomaretsoeng ka protheine glue.
Ho itšetlehile ka mofuta oa ts'ebetso ea maqephe a holim'a metsi, plywood e ka etsoa lehlabathe ka lehlakoreng le le leng kapa ka bobeli 'me e sa tsitsa. Litekanyo tse ka sehloohong tsa plywood li fanoe tafoleng.
Letlapa la 3: Litekanyo tse ka sehloohong tsa plywood, limilimithara
| bolelele (kapa bophara) | Ho kheloha ho lumelletsoeng | Latitude (kapa bolelele) | Ho kheloha ho lumelletsoeng |
| 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 |
Bolelele ba lakane e le 'ngoe ea plywood e lekantsoe ka tataiso ea lijo-thollo tsa maqephe a ka ntle.
Plywood e entsoe ka botenya ba 1,5; 2,0; 2,5; 3; 4; 5; 6; 8; 9; 10 le 12 limilimithara. Botenya bo bonyenyane ba birch le alder plywood bo ikemiselitse ho ba 1,5 mm, le mefuta e meng ea lehong - 2,5 m.
Ho kheloha ha plywood e sa tsitsang ho latela boholo ba limilimithara ho lumelloa:
Bakeng sa botenya ba plywood ka mm
- 1,5; 2,0 le 2,5 - ± 0,2
- 3,0 - ± 0,3
- 4,5 le 6,0 - ± 0,4
- 8,0; 9,0 le 10,0 - ± 0,4 ho 0,5
- 12,0 - ± 0,6
Ha sanding plywood, ho fokotseha ha botenya ba eona ka lehlakoreng le le leng (ho nahanoa ka ho kheloha ho lumelletsoeng) ha hoa lokela ho feta 0,2 mm, mahlakoreng ka bobeli 0,4 mm.
Ho ea ka boleng, veneer bakeng sa plywood e entsoe ka mefuta e latelang: A, A1, AB, AB1, B, BB, C. Lintlha tsa khetho ea maqephe li fanoa tafoleng. 4.
Letlapa la 4: Khetho ea maqephe a mefuta e fapaneng ea plywood
| Makhasi a letsoai | Mofuta oa plywood | ||||||
| A | A1 | AB | AB1 | B | BB | C | |
| Mofuta oa lekhasi | |||||||
| Dinta | A | A | AB | AB | B | BB | C |
| Reverse side | AB | B | B | BB | BB | C | C |
Likarolo tse tšesaane tse arohaneng tsa lehong (ho ea ka botenya ba plywood) li lokela ho ba tsa mofuta o le mong oa lehong le botenya bo lekanang.
Plywood e tlameha ho khomarela ka thata, e se na li-bubble,
ha e a tlameha ho qepha ha e kobeha. Matla a ho qetela a ho kuta ka lera la sekhomaretsi a fanoa tafoleng. 5.
Letlapa la 5: Matla a ho qetela a ho kuta ka lera la sekhomaretsi kg/cm3 (bonyane)
| Lebitso la plywood |
Plywood e nang le khanyetso e eketsehileng ea metsi |
Plywood ea mahareng ho hanyetsa metsi | Plywood e nang le khanyetso e fokolang | ||
| Ka sekhomaretsi sa carbamide | Ka albumin casein glues | ||||
| Ka mor'a hora e 1 ka metsi a belang | Ka mor'a ho bolokoa ka metsing ka hare ho lihora tse 24 | Boemong bo omileng | Ka mor'a hora e 1 ka metsi a belang | Boemong bo omileng | |
|
Birch... Alder, beech, linden, molora, elm, oak, fir, pine, spruce le kedare ... Jasikova... |
12 | 12 | 12 | 5 | 12 |
| 10 |
10 |
10 6 |
4 3 |
10 6 |
|
Ho tlisoa ha plywood ho ea ka litekanyo, lihlopha, lihlahisoa, mefuta ea lehong, tataiso ea likhoele tsa lehong ka maqephe le mokhoa oa ho sebetsa o etsoa ho latela litlhaloso tsa moreki.
Plywood e entsoeng ka lehlabathe e fumanoa ka lehong la lehlabathe ka mechine e khethehileng bakeng sa plywood ea lehlabathe 'me e sebelisoa e le thepa e koahelang lihlahisoa tsa lehong.
Veneer e entsoeng ka lehlabathe e arotsoe ka radial, semi-radial, tangential le tangential - ka pele, e fumanoang ho tloha lifateng tsa lifate (tafole ea 6).
Letlapa la 6: Likarolo tsa sebopeho sa mefuta e fapaneng ea plywood
| Mofuta wa sefaha | Likarolo tsa sebopeho | |
| ka lilemo | ka mahlaseli a mantlha | |
| Radial | Lilemo li na le ponahalo ea mela e otlolohileng, e bapileng | Mahlaseli a mantlha a sebopeho sa lihlopha tse pharallang a fumaneha bonyane 3/4 ea bokaholimo ba poleiti |
| Semi-radial | Sena | Mahlaseli a mantlha a sebopeho sa methalo ea oblique kapa ea longitudinal a fumaneha bonyane 1/2 ea bokaholimo ba poleiti. |
| Tangential | Lithupa tse etsang li-cones tsa kholo li na le ponahalo ea lihlopha tse oblique kapa mela | Mahlaseli a mantlha a na le ponahalo ea lihlopha kapa mela ea longitudinal kapa oblique |
| Tangentially - ka pele | Ka lilemo, li na le ponahalo ea mela e koetsoeng e koetsoeng kapa lihlopha | Mahlaseli a mantlha a na le ponahalo ea mela kapa lihlopha tse kobehileng |
Ho ea ka boleng ba lehong, plywood e arotsoe ka lihlopha tse tharo: I, II le III.
Veneer e entsoe ka oak, beech, walnut, chub, maple, molora, elm, chestnut, sycamore, Amur velvet, pere, apole, poplar, ciliegia, acacia, birch, elm le hornbeam.
Bolelele ba li-radial, semi-radial le tangential veneers bo tloha ho 1,0 m le ho feta; tangentially - ka pele - ho tloha 0,3 ho ea ho feta ka keketseho ea 0,1 m.
Botenya ba veneer ke ba mefuta eohle - 0,8; 1,0; 1,2; 1,5 limilimithara.
Letlapa la 7: Bophara ba maqephe bakeng sa plywood ea mefuta e sa tšoaneng, mm
| Mofuta oa lesela | Le sehlopha | Sehlopha sa II | Sehlopha sa III |
| Radial, semi-radial le tangential | 130 | 100 | 80 |
| Tangentially - ka pele | 200 | 150 | 100 |
Ho kheloha ho tloha botenya bo behiloeng (ka limilimithara) ho lumelletsoe:
- Bakeng sa botenya ba veneer 0,8 mm - ± 0,05
- Bakeng sa botenya ba veneer 1,0 mm - ± 0,08
- Bakeng sa botenya ba veneer 1,2 - 1,5 mm - ± 0,1
Mongobo oa veneer ke 10 ± 2%.
Mabapi le boleng ba lehong, veneer e tlameha ho finyella litlhoko tsa maemo a teng. Lipampiri tsa Veneer li tlameha ho ba le sebaka se hloekileng se bataletseng, se se nang mahlahahlaha, li-scratches, mapetsong le matheba a tšepe.
