NO124060B

NO124060B -

Info

Publication number: NO124060B
Application number: NO2728/69A
Authority: NO
Inventors: P Jakobsson
Original assignee: Intong Ab
Priority date: 1968-07-01
Filing date: 1969-06-30
Publication date: 1972-02-28
Also published as: GB1239172A; DK126619B; US3602358A; CH482612A; FI44098B; NL6910014A; BE735499A; NL158727B; ES368975A1; SE308269B; FR2012081A1; AT297588B; DE1932983A1

Description

Fremgangsmåte for å frigjøre lettbetongenheter samt anordning herfor. Procedure for releasing lightweight concrete units and device for this.

Lettbetong fremstilles vanligvis på en slik måte at finfordelte kalk- og kiselsyreholdige råmaterialer blandes med vann og der-efter tilfores et poredannende stoff f.eks.. aluminiumpulver, hvorefter råmassen stopes i relativt store former,, hvor den ekspanderer og avbinder til en konsistens egnet for oppdeling. Forminnholdet oppdeles når det befinner seg i. denne plastiske tilstand, i onskede enheter ved saging ved hjelp av i rammer inn-spente skjæreorgan, f.eks. rtråder. Efter denne oppdeling innfores materialet i liggende autoklaver for dampherdning.. Når det herdede materiale kommer Tit av autoklavene for f-rigjoring Lightweight concrete is usually produced in such a way that finely divided lime and silicic acid-containing raw materials are mixed with water and then a pore-forming substance is added, e.g. aluminum powder, after which the raw mass is poured into relatively large forms, where it expands and binds to a suitable consistency for division. The mold content, when it is in this plastic state, is divided into desired units by sawing with the aid of cutting means clamped in frames, e.g. rthreads. After this division, the material is introduced into horizontal autoclaves for steam hardening. When the hardened material comes out of the autoclaves for curing

og lagring i de oppsagede enheter, kan det ved anvendelse av visse and storage in the terminated units, it can by applying certain

råmaterialer forekomme en viss vedhefting i sagsnittene, hvilket kan vanskeliggjøre adskillelsen. raw materials, a certain adhesion may occur in the saw cuts, which can make separation difficult.

De manuelle metoder som anvendes for frigjoring har alle det felles at de. er arbeidskrevende og at risiko for skader på spesi-elt enhetenes hjorner og kanter er relativt stor. Maskinelle, anordninger for.å lette adskillelsen er tidligere kjent, f.eks. ifolge svensk patent 16^.138. De er fortrinnsvis beregnet for storre, armerte lettbetongelementer og har vist seg å være mindre egnet for f.eks. byggeblokker, bl.a. på grunn av at deres anvendelse er altfor tidskrevende og medforer for store omkostninger. The manual methods used for release all have in common that they. is labor-intensive and that the risk of damage to the corners and edges of the units in particular is relatively large. Mechanical devices for facilitating the separation are previously known, e.g. according to Swedish patent 16^.138. They are preferably intended for large, reinforced lightweight concrete elements and have proven to be less suitable for e.g. building blocks, i.a. due to the fact that their application is far too time-consuming and involves too many costs.

Oppfinnelsen tilsikter en losning av problemet på maskinell vis å frigjore dampherdede lettbetongenheter, fortrinnsvis blokkma-teriale. Ifolge oppfinnelsen innfores det fra autoklavene kom-mende ikke-frigjorte forminnhold mellom to i transportretningen efter hverandre anordnede.separat drevne rullepar, hvor rullene i det forste rullepar har en viss konstant periferihastighet, og rullene i det andre rullepar har en noe hoyere hastighet. Ved de forskjellige hastigheter for rulleparene tilveiebringes en trekkraft som virker mellom lettbetongenhetene, således at disse deles i sagsnitt. Ifolge en variant av oppfinnelsen har en av rullene i det andre rullepar en hoyere periferihastighet enn den andre i samme rullepar, hvorved foruten trekkraften, også et brytende moment bidrar til å losne lettbetongenhetene fra hverandre. The invention aims to solve the problem of mechanically releasing steam-hardened lightweight concrete units, preferably block material. According to the invention, non-released form contents coming from the autoclaves are introduced between two separately driven pairs of rollers arranged one behind the other in the transport direction, where the rollers in the first roller pair have a certain constant peripheral speed, and the rollers in the second roller pair have a somewhat higher speed. At the different speeds for the roller pairs, a traction force is provided which acts between the lightweight concrete units, so that these are divided into saw sections. According to a variant of the invention, one of the rollers in the second pair of rollers has a higher peripheral speed than the other in the same pair of rollers, whereby in addition to the traction force, a breaking torque also contributes to loosening the lightweight concrete units from each other.

Fremgangsmåten ifolge oppfinnelsen beskrives nærmere i forbind-else med en redegjorelse for•en utforelsesform av en anordning for utforelse av fremgangsmåten. The method according to the invention is described in more detail in connection with an account of an embodiment of a device for carrying out the method.

I fig. 1 vises anordningen omkring en frigjbringsanordning. På et endelost transportbånd 11 er det ikke-adskilte. forminnhold 10 anbragt på en: slik- måte at de adskillende snitt i lettbetongmas-sen ligger vinkelrett på båndets bevegelsesretning for., transport gjennom frigjoringsanordningen 12.. For• kontinuerlig, vekktran-sport av adskilte lettbetongenheter, er bak frigjoringsanordningen anordnet ytterligere et éndelbst transportbånd 13. Dette kan hensiktsmessig være et gummihånd for å beskytte enhetene mot kantskader. Alternativt kan enhetene umiddelbart efter frigjør-ingen anbringes på paller og disse borttransporteres. In fig. 1 shows the device around a release device. On an endless conveyor belt 11, it is non-separated. mold content 10 arranged in such a way that the separating cuts in the lightweight concrete mass are perpendicular to the belt's direction of movement for transport through the release device 12. For continuous, remote transport of separated lightweight concrete units, an additional single-part conveyor belt is arranged behind the release device 13. This can suitably be a rubber hand to protect the units from edge damage. Alternatively, the units can be placed on pallets immediately after release and these transported away.

Anordningen virker på folgende måte (se fig. 2) : det oppdelte autoklavbehandlede forminnhold transporteres på båndet 11 og gripes av rullene lh og 15, hvilke har samme periferihastighet The device works in the following way (see fig. 2): the divided autoclaved mold contents are transported on the belt 11 and gripped by the rollers lh and 15, which have the same peripheral speed

som båndet 11. Rullen l1) er anordnet således at den ligger an as the band 11. The roll l1) is arranged so that it rests against

mot forminnholdet med et visst trykk i et på transportretningen vinkelrett plan. Blokken .A passerer rullene lk- og 15, o_g når disse har grepet blokken B er den førstnevnte blokk blitt fort inn mellom rullene 16 og 17. Rullen 16 ligger da an mot blokken A med et visst trykk rettet vinkelrett på transportretningen. against the mold contents with a certain pressure in a plane perpendicular to the transport direction. The block .A passes the rollers 1k- and 15, and when these have gripped the block B, the first-mentioned block is quickly inserted between the rollers 16 and 17. The roller 16 then rests against the block A with a certain pressure directed perpendicular to the direction of transport.

Ved at rullene i det andre rullepar har en noe hoyere periferihastighet enn rullene i det for ste,, og særlig hvis nullen 16 har en ytterligere, noe hoyere periferihasti<g>het «nn rullen 17, opp-står en trekkraft og et boyemoment i lettbetøngmassen som ad-skiller blokken efter sag snittene:.- Blokken A faller ned på transportbåndet-,13 og bortfbres. - Når rullens 16 moment går mot 0, løftes:rullen ved styring av eh her ikke nærmere beskrevet automatisk og anbringbar trykkanordning mot neste blokk, forst efter et visst bestemt Intervall for ikke å skade kantene på lettbetongen. Dette intervall bestemmer av senteravstanden mellom rullene lh og 16, hvilken igjen bestemmes av den minst fore-kommende blokkdlmensjon. Rullene 1*+ og -16; kan hensiktsmessig være festet i den ene ende av fortrinnsvis maskinelt påvirkede vektstenger 18, 19. Som.maskinelle-styringer kan f.eks. anvendes "hydrauliske sylindre. As the rollers in the second roller pair have a somewhat higher peripheral speed than the rollers in the first, and especially if the zero 16 has a further, somewhat higher peripheral speed "nn the roller 17, a traction force and a bending moment arise in the lightweight concrete mass that separates the block according to the saw cuts:.- The block A falls onto the conveyor belt-,13 and is removed. - When the roller's 16 torque goes towards 0, the roller is lifted by the control of eh not further described here automatically and attachable pressure device towards the next block, first after a certain determined Interval so as not to damage the edges of the lightweight concrete. This interval is determined by the center distance between the rollers 1h and 16, which in turn is determined by the least occurring block dimension. Rolls 1*+ and -16; can suitably be attached at one end of preferably mechanically influenced weight rods 18, 19. As.mechanical controls can e.g. "hydraulic cylinders" are used.

Anordningen virker således på -en slik måte at den deler lettbetongen i sagsnittene .helt automatisk og -kontinuerlig uten at man behbver -å stille inn dimensjonene.. The device thus works - in such a way that it divides the lightweight concrete into saw cuts - completely automatically and - continuously without the need - to set the dimensions.

Claims

1. • Procedure - to release steam-hardened lightweight concrete units which are in and of themselves divided for the steam nerf, kara -k -

characterized in that a non-separated form content is fed between and into contact with two pairs of rollers arranged one behind the other, whereby the rollers in the first pair of rollers are given a certain constant peripheral speed and the rollers in the second pair of rollers are given a peripheral speed that is higher than the peripheral speed of the first pair of rollers.

2. Method as stated in claim 1, characterized in that one of the rollers in the second roller pair is given a higher peripheral speed than the other roller in the same roller pair.

3. Device for carrying out the method as stated in claim 1 or 2, characterized in that between two transport means for the respective extraction gate (11) of the non-separated mold contents and removal (13) of the freed lightweight concrete units, two separate drivable roller pairs (14,15 or 16,17) for contact with the mold contents.

4. Device as stated in claim 3, characterized in that a roller in it. at least one pair of rollers can be placed with a suitable pressure against the mold contents, directed perpendicular to the direction of transport.

5. Device as stated in claim 3, characterized in that a roller (14,16) in each pair of rollers can be placed with a suitable pressure against the mold contents, directed perpendicular to the direction of transport.

6. Device as stated in one of claims 4-5, characterized in that the <f>ofsk<y>vable roller is placed at one end of a preferably mechanically actuable lever device.

7. Device as specified in claim 6. characterized in that the lever arrangement is influenced by a hydraulic cylinder.