SE426371B - WHEN PREPARING A CHEESE DISC - Google Patents

WHEN PREPARING A CHEESE DISC

Info

Publication number
SE426371B
SE426371B SE8103255A SE8103255A SE426371B SE 426371 B SE426371 B SE 426371B SE 8103255 A SE8103255 A SE 8103255A SE 8103255 A SE8103255 A SE 8103255A SE 426371 B SE426371 B SE 426371B
Authority
SE
Sweden
Prior art keywords
surface layer
disc
board
fractionated
layers
Prior art date
Application number
SE8103255A
Other languages
Swedish (sv)
Other versions
SE8103255L (en
SE426371C (en
Inventor
L-O Johansson
Original Assignee
Swedspan Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swedspan Ab filed Critical Swedspan Ab
Priority to SE8103255A priority Critical patent/SE426371C/en
Priority to EP82850116A priority patent/EP0065941A3/en
Publication of SE8103255L publication Critical patent/SE8103255L/en
Publication of SE426371B publication Critical patent/SE426371B/en
Publication of SE426371C publication Critical patent/SE426371C/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

$31Û3255-9 10 15 20 25 30 35 Dessa ändamål åstadkommes i enlighet med uppfinningen genom ett sätt som kännetecknas av att materialet för yt- skiktet fraktioneras och anbringas med den finaste delen av ytskiktsmaterialet närmast föregående, längre in i skivan belägna skikt och den grövsta delen av ytskikts- materialet ytterst och attytskiktet vid slipning av skivan efter pressning slipas ned till önskad finhet hos materia- let på skivans yta. These objects are achieved in accordance with the invention by a method characterized in that the material for the surface layer is fractionated and applied with the finest part of the surface layer material immediately preceding, further into the disc layer and the coarsest the part of the surface layer material at the end and the surface layer when sanding the board after pressing is ground down to the desired fineness of the material on the surface of the board.

Problemlösningen enligt föreliggande uppfinning inne- bär således en brytning med det konventionella tänkandet enligt vilket man applicerat antingen ofraktionerat spânmate- rial, vilket senare genomgående pâförts med ökande finhet utåt mot skivans yta. 7 Genom sättet enligt uppfinningen uppnås jämfört med sådana sätt som använder ofraktionerat material för ytskik- tet att man vid samma procentuella tillsats av bindemedel till spånmaterialet för ytskiktet får en skiva med väsent- ligt högre volymvikt och böjhållfasthet eller att man för uppnâende av samma böjhållfasthet kan använda väsentligt lägre procentuell bindemedelstillsats.The problem solution according to the present invention thus entails a break with the conventional thinking according to which either unfractionated chip material has been applied, which is later consistently applied with increasing fineness outwards towards the surface of the disc. By means of the method according to the invention it is achieved compared with such methods which use unfractionated material for the surface layer that with the same percentage addition of binder to the chip material for the surface layer a disc with significantly higher bulk density and flexural strength is obtained or that for achieving the same flexural strength use significantly lower percentage of binder additive.

Vid fraktioneringen av ytskiktsmaterialet vid sättet enligt uppfinningen sker denna fraktionering företrädesvis med i och för sig för steglös fraktionering av rial kända metoder men påförandet av det fraktionerade ma- terialet sker i motsatt turordning jämfört med de konven- tionella metoderna för påföring av fraktionerat material, spånmate- dvs enligt uppfinningen ändras blåsriktningen vid vind- Stfiïflê till att bli den motsatta resp. rotationsriktningen ändras vid kastvalsar till den motsatta jämfört med de kon- ventionella metoderna. Emellertid kan även en stegvis frak- tionering av ytskiktsmaterialet i två eller flera fraktio- ner användas, om så önskas. I I Uppfinningen kommer i det följande att illustreras av ett exempel.In the fractionation of the surface layer material in the method according to the invention, this fractionation preferably takes place per se for stepless fractionation of known methods, but the application of the fractionated material takes place in the opposite order compared with the conventional methods for applying fractionated material, chip mat. - ie according to the invention, the direction of the wind changes at wind- St fi ï fl ê to become the opposite resp. the direction of rotation changes with casting rollers to the opposite compared with the conventional methods. However, a stepwise fractionation of the surface layer material into two or more fractions can also be used, if desired. The invention will be illustrated in the following by an example.

EXEMPEL Belimmat spån för mittskikt och ytskikt i en treskikts- skiva uttogs från fabriksdrift och pressades till 15 mm ski- 10 15 20 25 30 40 Ü) ...s L) 04 hä U1 vor i en laboratoriepress vid 200OC med en presstid av 7 sek/mm. Ytskiktsmaterialet uppgick till ca 35 vikt-% räk- nat på totala spånmaterialet.EXAMPLE Glued chip for middle layer and surface layer in a three-layer board was removed from factory operation and pressed to 15 mm board 10 15 20 25 30 40 Ü) ... s L) 04 hä U1 vor in a laboratory press at 200OC with a pressing time of 7 sec / mm. The surface layer material amounted to about 35% by weight calculated on the total chip material.

Enligt uppfinningen fraktionerades ytskiktsmaterialet i 2 fraktioner, den ena i omrâdet 0 - S mm och den andra över 5 mm. De båda fraktionerna ströddes med den finare fraktionen närmast mittskiktsmaterialet och på ömse sidor om detta och med den grövre fraktionen ytterst på skivor- nas båda sidor. Två olika limhalter (11,5 och 7,8 vikt~% räknat på ytskiktets vikt) användes, varvid tre skivor pressades vid vardera limhalten.According to the invention, the surface layer material was fractionated into 2 fractions, one in the range 0 - 5 mm and the other over 5 mm. The two fractions were sprinkled with the finer fraction closest to the middle layer material and on either side of it and with the coarser fraction at the end on both sides of the discs. Two different adhesive contents (11.5 and 7.8% by weight based on the weight of the surface layer) were used, three sheets being pressed at each adhesive content.

Ytterligare tvâ skivor pressades på samma sätt men med ett ytskiktsmaterial till vilket satts 5 vikt-% räk- nat på ytskiktsmaterialets vikt av obelimmat trädamm; lim- halt 11,5 vikt-% räknat på ytskiktsmaterialets vikt.Two more boards were pressed in the same way but with a surface layer material to which 5% by weight, based on the weight of the surface layer material of unbleached wood dust, was added; adhesive content 11.5% by weight based on the weight of the surface layer material.

Som kontroll pressades tre skivor med ej fraktionerat ytskiktsmaterial med en limhalt av 11,5 vikt-% räknat på ytskiktsmaterialets vikt.As a control, three sheets of unfractionated surface material with an adhesive content of 11.5% by weight, based on the weight of the surface material, were pressed.

Samtliga skivor slipades efter pressningen.All boards were ground after pressing.

Fem provbitar uttogs av varje skiva och undersöktes med avseende på volymvikt och böjhâllfasthet. De erhållna resultaten anges i nedanstående Tabell i form av medelvärde- na erhållna för de fem provbitarna. ggBELL Ytskiktsmaterial Limhalt i ytskikt Volymvikt Böjhållfast- vikt-s kg/m3 het, N/mmZ Ej fraktionerat 695 15,8 11,5 680 17,0 672 15,8 Medelvärde: 682 16,2 Fraktionerat 720 21,8 11,5 684 18,4 699 20,1 Medelvärde: 701 20,1 Fraktionerat 716 20,3 7,8 719 19,0 719 17,4 Medelvärde: 718 18,9 Fraktionerat 11,5 691 20,3 + 5 % damm 709 19,7 Medelvärde 700 20,0Five specimens were taken from each disc and examined for volume weight and flexural strength. The results obtained are given in the Table below in the form of the mean values obtained for the five test pieces. ggBELL Surface layer material Adhesive content in surface layer Volume weight Flexural strength-s kg / m3 hot, N / mmZ Non-fractionated 695 15.8 11.5 680 17.0 672 15.8 Mean value: 682 16.2 Fractionated 720 21.8 11.5 684 18.4 699 20.1 Mean: 701 20.1 Fractionated 716 20.3 7.8 719 19.0 719 17.4 Mean: 718 18.9 Fractional 11.5 691 20.3 + 5% dust 709 19 , 7 Mean 700 20.0

Claims (1)

1. 0 33103255-'9 PATENTKRAV Sätt vid framställning av en spånskiva, varvid ski- van byggs upp i skikt med ett mittskikt av grovt material innerst, ett ytskikt av fint material ytterst på vardera sidan av skivan och eventuellt ett eller flera mellanskikt mellan mittskiktet och vardera ytskiktet, k ä n n e - t e c k n a t av att materialet för ytskiktet fraktione- ras och anbringas med den finaste delen av ytskiktsmate- rialet närmast föregående, längre in i skivan belägna skikt och den grövsta delen av ytskiktsmatefiüüët yüxmst och att ytskiktet vid slipning av skivan efter pressning slipas ned till önskad finhet hos materialet på skivans yta. 10 8105255-9 SAMMANDRAG Ett sätt vid framställning av en spånskiva, varvid skivan byggs upp i skikt med ett mittskikt av grovt mate- rial innerst, ett ytskikt av fint material ytterst på var- dera sidan av skivan och eventuellt ett eller flera mellan- skikt mellan mittskiktet och vardera ytskiktet, enligt vil- ket sätt materialet för ytskiktet frakticneras och anbringas med den finaste delen av ytskiktsmaterialet närmast före- gående längre in i skivan belägna skikt och den grövsta delen av ytskiktsmaterialet ytterst och ytskiktet vid slipning av skivan efter pressning slipas ned till önskad finhet hos materialet på skivans yta.A patent for the production of a chipboard, the board being built up in layers with a middle layer of coarse material on the inside, a surface layer of fine material on the outside on each side of the board and possibly one or more intermediate layers between the middle layer and each surface layer, characterized in that the material for the surface layer is fractionated and applied with the finest part of the surface layer material immediately preceding, layers located further into the disc and the coarsest part of the surface layer mate fi üüët yüxmst and that the surface layer when grinding the disc after pressing, it is ground down to the desired fineness of the material on the surface of the disc. 10 8105255-9 SUMMARY A method of manufacturing a chipboard, wherein the board is built up in layers with a middle layer of coarse material on the inside, a surface layer of fine material on the outside on each side of the board and possibly one or more intermediate layers between the middle layer and each surface layer, according to which the material for the surface layer is fractionated and applied with the finest part of the surface layer material immediately preceding the layers located further into the disc and the coarsest part of the surface layer material at the end and the surface layer is ground down after pressing to the desired fineness of the material on the surface of the disc.
SE8103255A 1981-05-22 1981-05-22 WHEN PREPARING A CHEESE DISC SE426371C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE8103255A SE426371C (en) 1981-05-22 1981-05-22 WHEN PREPARING A CHEESE DISC
EP82850116A EP0065941A3 (en) 1981-05-22 1982-05-19 Method for the preparation of particle board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8103255A SE426371C (en) 1981-05-22 1981-05-22 WHEN PREPARING A CHEESE DISC

Publications (3)

Publication Number Publication Date
SE8103255L SE8103255L (en) 1982-11-23
SE426371B true SE426371B (en) 1983-01-17
SE426371C SE426371C (en) 1984-11-19

Family

ID=20343911

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8103255A SE426371C (en) 1981-05-22 1981-05-22 WHEN PREPARING A CHEESE DISC

Country Status (2)

Country Link
EP (1) EP0065941A3 (en)
SE (1) SE426371C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629586A1 (en) * 1986-08-30 1988-03-10 Kunnemeyer Hornitex METHOD FOR PRODUCING WOOD FIBER PANELS
US6284794B1 (en) 1996-11-05 2001-09-04 Head Explorer Aps Method for treating tension-type headache with inhibitors of nitric oxide and nitric oxide synthase
SE526784C2 (en) * 2003-11-13 2005-11-01 Swedwood Internat Ab Particleboard and process for the manufacture of particleboard

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR926024A (en) * 1946-04-25 1947-09-19 Process for the manufacture of pressed plates formed from several layers of wood particles and binder and pressed plate obtained by means of this process
FR1318585A (en) * 1962-03-30 1963-02-15 August Moralt wood powder form elements
DE1528232A1 (en) * 1965-10-01 1970-07-02 Aicher Geb Particle board and process for its manufacture
FR1486810A (en) * 1966-07-15 1967-06-30 Schenck Gmbh Carl Process and installation for manufacturing agglomerates, in particular panels or plates, from a web of dispersible material formed from several chouches
DE1806210A1 (en) * 1968-10-31 1970-07-02 Emsland Spanplatten Kg Hans St Process and system for the preparation of wood-based material for the production of chipboard with at least one-sided fine material top layer

Also Published As

Publication number Publication date
SE8103255L (en) 1982-11-23
EP0065941A2 (en) 1982-12-01
EP0065941A3 (en) 1984-08-15
SE426371C (en) 1984-11-19

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