NO751712L

NO751712L -

Info

Publication number: NO751712L
Application number: NO751712A
Authority: NO
Inventors: E G L Eriksson
Original assignee: Karlstadplattan Ab
Priority date: 1974-05-15
Filing date: 1975-05-14
Publication date: 1975-11-18
Also published as: FI56048B; FI56048C; SE7406503L; SE393146C; CA1028610A; DE2520175A1; SE393146B; FI751382A

Description

Oppfinnelsen vedrorer en fremgangsmåte for legging av gulv på sluttede underlag, idet det på underlaget anbringes et lost mellomsjikt, som avjevnes, og på dette et trykkfordelingssjikt av halvstivt eller stivt platemateriale. Slike underlag kan utgjores av stopte betongbjelkelag, forekommende gamle gulv eller lignende. Fortrinnsvis anvendes oppfinnelsen ved underlag, som er noe ujevne og trenger avjevning, for et overflatesjikt kan anbringes. Det er i denne forbindelse kjent på underlaget å anbringe et utjevnende mellomsjikt og på dette et fast overflatesjikt (DAS 1 149 156). The invention relates to a method for laying floors on closed substrates, where a loose intermediate layer is placed on the substrate, which is levelled, and on this a pressure distribution layer of semi-rigid or rigid plate material. Such substrates can be made of stopped concrete beam layers, existing old floors or the like. Preferably, the invention is used for substrates that are somewhat uneven and need levelling, because a surface layer can be applied. In this connection, it is known to place an equalizing intermediate layer on the substrate and on this a solid surface layer (DAS 1 149 156).

Foreliggende oppfinnelse har til oppgave å foreslå en fremgangsmåte av foran angitte slag, som er enkel å utove, okonomisk å anvende samt gir et mellomsjikt som ved langtidsbelastning ikke underkastes såkalt koldflyting. Videre skal en viss isolasjons-virkning mot trinnlyd og varme oppnås. The purpose of the present invention is to propose a method of the kind indicated above, which is easy to weave, economical to use and provides an intermediate layer which is not subjected to so-called cold flow during long-term loading. Furthermore, a certain insulation effect against step sound and heat must be achieved.

Denne oppgave loses ifolge oppfinnelsen stort sett ved at det for mellomsjiktet anvendes sagspon, som for utspredningen siktes for å fjerne altfor store og lange partikler, at de siktede sagspon for utspredningen gis hoyere slankhetstall ved snitting eller spalting av sagsponpartikler i det vesentlige parallelt med sponenes fiberretning, at det således forbehandlede sagsponmateriale spres på det sluttede underlag og avjevnes til 5-25 mm tykkelse, fortrinnsvis 10-15 mm, hvorefter platematerialet legges ut på det således avjevnede sagsponsjikt samt at eventuelt et slitesjikt e.l. anbringes på platematerialet. According to the invention, this task is largely solved by using sawdust for the middle layer, which is sifted for spreading to remove excessively large and long particles, that the sifted sawdust for spreading is given a higher slenderness figure by cutting or splitting the sawdust particles essentially parallel to the grain direction of the chips , that the thus pre-treated sawdust material is spread on the sealed substrate and leveled to a thickness of 5-25 mm, preferably 10-15 mm, after which the plate material is laid out on the thus leveled sawdust layer and that, if necessary, a wear layer or the like placed on the plate material.

Sagspon som mellomsjikt utgjor et rimelig råmateriale, som dess-uten har liten vekt i forhold til sitt volum, er en dårligjvarmeleder og har lyddempende egenskaper. En ytterligere fordel Sawdust as an intermediate layer is a reasonable raw material, which also has little weight in relation to its volume, is a poor conductor of heat and has sound dampening properties. A further advantage

i in

er at sagsponpartiklene vil ligge i alle mulige retninger, dvs. jbl.a. med sin storste lengde både parallelt med underlaget, i rett vinkel i forhold til dette samt i mange andre stillinger. Sagsponene får derved meget god bæreevne, partiklene "filtes" sammen og ujevnheter i underlaget kompenseres. Takket være det halvstive til stive platemateriale fordeles eventuelle punktfor-mede belastninger på en storre flate. is that the sawdust particles will lie in all possible directions, i.e. etc. with its greatest length both parallel to the substrate, at right angles to it and in many other positions. The sawdust thereby has very good bearing capacity, the particles are "felt" together and unevenness in the substrate is compensated. Thanks to the semi-rigid to rigid plate material, any point-shaped loads are distributed over a larger surface.

Snittingen eller spaltingen av sagsponpartiklene blir spesielt effektiv, hvis fortrinnsvis grovkornede sagsponfraksjoner snittes resp. spaltes. Ved slik snitting resp. spalting blir sagspon-materialet ifolge praktiske erfaringer meget hensiktsmessig for omtalte formål. Ved det forbedrede slankhetstall fås en for-bedret "sammenfilting" av sagsponpartiklene, hvilket gir både bedre bæreevne og bedre svikt i gulvet. The cutting or splitting of the sawdust particles becomes particularly effective, if preferably coarse-grained sawdust fractions are cut or split. With such cutting or splitting, the sawdust material is, according to practical experience, very appropriate for the purposes mentioned. With the improved slenderness figure, an improved "felting together" of the sawdust particles is obtained, which gives both better load-bearing capacity and better failure in the floor.

Ifolge ytterligere utforelsesformer av oppfinnelsen behandles sagsponene for eller efter utspredningen med bindemiddel, fortrinnsvis med ved værelsestemperatur, dvs. ca. 15-20° C, langsomt herdende eller bindende harpikser. Ved denne harpikstil-setning okes sagsponsjiktets bæreevne ytterligere. According to further embodiments of the invention, the sawdust is treated before or after spreading with a binder, preferably with at room temperature, i.e. approx. 15-20° C, slow curing or binding resins. With this addition of resin, the load-bearing capacity of the saw board is further increased.

Herdingen av de således behandlede sagspon kan ifolge ytterligere en utforelsesform av oppfinnelsen påskyndes resp. innledes ved tilforsel av herdingsmiddel, katalysator eller akselerator. Derved kan gulvene allerede efter kortere tid utsettes for full belastning. Nevnte tilforsel av herdingsmiddel, katalysator eller akselerator kan fortrinnsvis skje i væske- eller gassform på i og for seg kjent måte. According to a further embodiment of the invention, the hardening of the thus treated sawdust can be accelerated or is preceded by the supply of curing agent, catalyst or accelerator. As a result, the floors can already be exposed to full load after a short time. Said supply of curing agent, catalyst or accelerator can preferably take place in liquid or gaseous form in a manner known per se.

Praktiske forsok har vist at gulv lagt ifolge oppfinnelsen medforer-små gulvleggingsomkostninger, lave råmaterialomkostninger og allikevel god bæreevne uten å synke nevneverdig ved storre belastede steder. Practical trials have shown that floors laid according to the invention lead to low floor laying costs, low raw material costs and still good load-bearing capacity without significantly sagging in heavily loaded areas.

Oppfinnelsen vedrorer også et sagsponmateriale for utovelse av fremgangsmåten ifolge oppfinnelsen. The invention also relates to a sawdust material for practicing the method according to the invention.

Oppfinnelsen skal nu forklares nærmere i forbindelse med et utforelseseksempel. The invention will now be explained in more detail in connection with an exemplary embodiment.

Sagspon fra sagverk siktes for å fjerne for lange og for grove I partikler, slik som sagavfall, flis , barkrester osv. De således siktede sagspon siktes i to eller flere fraksjoner med forskjellig kornstorrelse, idet i det minste den groveste tilfores en spalteanordning av i og for seg kjent slag, i hvilken sagsponpartiklene spaltes stort sett parallelt med sponenes fiberretning og tilbakefores til fraksjoneringsanordningen. Ovrige fraksjoner tilfores hver for seg eller samlet en lime-anordning, hvorved i det forstnevnte tilfelle et noe lavere bindemiddelforbruk oppnås. I limeanordningen behandles sagsponene med hensiktsmessig bindemiddel, fortrinnsvis ved værelsestemperatur herdbare eller bindende harpikser. Sawdust from sawmills is sifted to remove particles that are too long and too coarse, such as sawdust, chips, bark residues, etc. The sawdust sifted in this way is sieved into two or more fractions with different grain sizes, with at least the coarsest being fed to a splitting device of i and per se known type, in which the sawdust particles are split largely parallel to the fiber direction of the chips and fed back to the fractionation device. Other fractions are supplied individually or collectively to a gluing device, whereby in the former case a somewhat lower binder consumption is achieved. In the gluing device, the sawdust is treated with a suitable binder, preferably at room temperature hardenable or binding resins.

Det således forbehandlede sagsponmateriale, som eventuelt kan droyes ut med opptil samme mengde annet egnet materiale, slik som f.eks. hovelspon, skjærspon, såldspon fra flising av masseved for cellulosefremstilling, slipespon og treslipestov fra mobelindustrien og sponplatefabrikker, spres på et stopt betongbjelkelag og avjevnes til gjennomsnittlig 10-15 mm tykkelse. Overskudd av materiale fjernes. Oppå det således avjevnede sagsponsjikt legges et halvstivt til stivt platemateriale, f.eks. sponplater, hvis tykkelse velges altefter den ventede belastning og det underliggende mellomsjikts tykkelse, idet som hovedregel gjelder at tykkere mellomsjikt og hoyere belastning krever tykkere platemateriale. Anvendes sponplater som platemateriale, anbringes med fordel et slitesjikt oppå platematerialet enten ved maling eller f.eks. legging av plastplater, linoleum eller annet gulvmateriale. The thus pre-treated sawdust material, which can possibly be drawn out with up to the same amount of other suitable material, such as e.g. planer shavings, cutting shavings, sawdust from chipping pulpwood for cellulose production, sanding shavings and wood sanding dust from the furniture industry and chipboard factories, are spread on a stopped concrete beam layer and leveled to an average thickness of 10-15 mm. Excess material is removed. A semi-rigid to rigid sheet material is placed on top of the leveled sawn sponge layer, e.g. chipboards, the thickness of which is chosen according to the expected load and the thickness of the underlying intermediate layer, as a general rule applies that thicker intermediate layers and higher loads require thicker board material. If chipboard is used as panel material, it is advantageous to place a wear layer on top of the panel material either by painting or e.g. laying plastic sheets, linoleum or other flooring material.

For det halvstive eller stive platemateriale legges på det avjevnede sagsponsjikt og hvis sagsponene er limt med hensiktsmessig harpiks, kan det bli nodvendig å tilsette herdingsmiddel, katalysator eller akselerator for å påskynde herdingen. Denne tilsetning skjer fortrinnsvis ved finfordelt påsproyting, spraying e.l. For the semi-rigid or rigid sheet material, the leveled sawdust layer is placed on top and if the sawdust is glued with an appropriate resin, it may be necessary to add a curing agent, catalyst or accelerator to speed up the curing. This addition preferably takes place by finely distributed sprinkling, spraying, etc.

En annen mulighet er å avstå fra anvendelse av bindemiddel, hvorved sponenes largringsbestandighet for utspredningen blir praktisk talt ubegrenset. Denne fordel oppnås imidlertid også ljivis man anvender folgende fremgangsmåte: Sagspon fra sagverk siktes, fraksjoneres og spaltes ifolge (ovenstående, hvorpå materialet uten foregående bindemiddeltil-setninger distribueres og eventuelt lagres for anvendelse. Utspredning og avjevning til onsket storrelse skjer på foran beskrevet måte. Forst derpå sprayes, dusjes, sproytes e.l. bindemiddel samt herdingsmiddel og eventuelt også akselerator på det avjevnede sagsponsjikt, og sponplater eller annet halvstivt eller stivt platemateriale legges på, hvorpå gulvet i prinsippet er trafikerbart. Another possibility is to refrain from using a binder, whereby the chip's storage resistance for the spread becomes practically unlimited. However, this advantage is also achieved if the following method is used: Sawdust from sawmills is sieved, fractionated and split according to (above), after which the material without previous binder additions is distributed and possibly stored for use. Spreading and leveling to the desired size takes place in the manner described above. First then a binder as well as a curing agent and possibly also an accelerator are sprayed, showered, sprayed etc. on the leveled sawn sponge layer, and chipboard or other semi-rigid or rigid board material is laid on, on which the floor is in principle passable.

En annen måte å tilfore herdingsmiddel er i gassform, f.eks. ammoniakkgass eller svoveldioksyd. Platematerialet legges da fortrinnsvis forst ut på det avjevnede sagsponsjikt, hvorpå herdingsmiddel tilfores i gassform ved i platematerialet ut-tatte åpninger , som derpå igjen lukkes. Another way to add curing agent is in gaseous form, e.g. ammonia gas or sulfur dioxide. The sheet material is then preferably first laid out on the leveled sawn sponge surface, after which hardening agent is supplied in gaseous form through openings made in the sheet material, which are then closed again.

Praktiske prover har vist at gulv lagt ifolge oppfinnelsen medforer omkostningsbesparelser og god trinnlydisolasjon mot underliggende rom, samtidig som sagsponsjiktet oker gulvets varmeisolerende evne og arbeide med sliping av betonggulv e.l. kan sloyfes. Practical tests have shown that floors laid according to the invention lead to cost savings and good footfall sound insulation against the underlying room, while the sawn board increases the floor's heat-insulating ability and work with grinding concrete floors etc. may be omitted.

Selv om oppfinnelsen er blitt beskrevet i forbindelse med et utforelseseksempel av denne, kan den imidlertid på vilkårlig måte varieres innenfor rammen av patentkravene. Although the invention has been described in connection with an exemplary embodiment thereof, it can however be varied in any way within the framework of the patent claims.

Claims

1. Procedure for laying floors on closed substrates, where a loose intermediate layer is placed on the substrate, which is leveled, and on top of this a pressure distribution layer of semi-rigid or rigid plate material, characterized by the fact that sawdust is used as an equalizing intermediate layer, which for spreading is aimed to remove excessively large and long particles, that the sieved sawdust for spreading is given a higher slenderness figure by cutting or splitting the sawdust particles largely parallel to the grain direction of the chips, that the thus pre-treated sawdust material is spread on the aforementioned substrate and leveled to a thickness of 5-25 mm, preferably 10-15 mm, on which plate material The material is laid out on the leveled sawn sponge layer and, if necessary, a [surface or wear layer is placed on the board material. j

2. Procedure for laying floors as specified in claim 1, characterized in that as semi-rigid or rigid board material is used chipboard, wooden lamella boards, plywood, wood fiber boards etc. with a thickness of 2-25 mm, preferably 6-12 mm.

3. Method as specified in claim 1, characterized in that the sawdust is divided into two or more fractions of different coarseness after said sieving and that the coarsest one is fed to a cutting or splitting device.

4. Method as set forth in claim 1 or 3, characterized in that the sawdust for spreading is treated with a binder, preferably a slowly hardening or binding resin at room temperature.

5. Method as stated in claim 4, character, e ris e r t in that the sawdust for treatment with binder is divided into fractions with different grain sizes, each of which is fed to a gluing station.

6. Method as specified in claim 1 or 3, characterized in that the sawdust is first treated with a binder after spreading and leveling, preferably with room-temperature curable or binding resins, by means of spraying, showering, spraying etc.

7. Method as specified in claim 4, 5 or 6, characterized in that the hardening of the spread and leveled sawdust treated with binder is initiated or accelerated by supplying a hardening agent, catalyst or accelerator.

8. Sawdust material for rehearsing the method for laying floors on sealed substrates as specified in one or some of the preceding requirements, characterized in that the sawdust material is freed from overly long and coarse particles I and that when cutting resp. splitting largely parallel to the fiber direction of the sawdust particles at least partially results in a higher slenderness figure.

9. Sawdust material as stated in claim 8, characterized in that it has been treated with a binder.