DK158073B - DEVICE FOR STRENGTHING OF EXTENSIVE CONCRETE TOPICS - Google Patents
DEVICE FOR STRENGTHING OF EXTENSIVE CONCRETE TOPICS Download PDFInfo
- Publication number
- DK158073B DK158073B DK518082A DK518082A DK158073B DK 158073 B DK158073 B DK 158073B DK 518082 A DK518082 A DK 518082A DK 518082 A DK518082 A DK 518082A DK 158073 B DK158073 B DK 158073B
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- DK
- Denmark
- Prior art keywords
- concrete
- mold
- conveyor
- lower edge
- molding
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
- B28B3/224—Twin screw extruders, e.g. double shaft extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
- B28B3/228—Slipform casting extruder, e.g. self-propelled extruder
Abstract
Description
DK 158073 BDK 158073 B
Opfindelsen angår et apparat til strengpresning af langstrakte betonemner og af den i indledningen til krav 1 angivne art.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an apparatus for extruding elongated concrete blanks and of the kind specified in the preamble of claim 1.
Strengpresning af beton gennem en form, sædvanligvis 5 under anvendelse af en skruetransportør til at presse betonen gennem formen er velkendt. Fra beskrivelsen til USA patent nr. 3.159.897 kendes et apparat med et antal skruetransportører eller transportsnegle, der hver har en vinge, som er fastgjort på en aksel. Hver transportsnegl har en glattedorn 10 fastgjort til sin afgangsende, således at dornen roterer sammen med transportsneglen. En vibrator er monteret på apparatet udenfor formningsområdet, således at hele apparatet vibreres. I denne kendte maskine er glatteenheden fastgjort til en transportsnegl og roterer sammen med denne, og appa-15 ratet former således betonplader, der indvendigt må have et cirkulært tværsnit.Compressing concrete through a mold, usually 5 using a screw conveyor to push the concrete through the mold is well known. From U.S. Pat. Each conveyor auger has a smooth mandrel 10 attached to its outlet end so that the mandrel rotates with the conveyor auger. A vibrator is mounted on the apparatus outside the molding area so that the entire apparatus is vibrated. In this known machine, the smoothing unit is attached to a conveyor screw and rotates therewith, and the apparatus thus forms concrete slabs which must have a circular cross-section internally.
Canadisk patentskrift nr. 910.030 omhandler en strengpresse med et formeelement med vilkårlig tværsnitsform; I apparatet er formeelementet anbragt uafhængigt af og umid-20 delbart efter afgangsenden af transportsneglen. Formeelementet er anbragt således at det ikke drejes rundt af transportsneglen. Det kan være anbragt, så det ikke roterer, eller det kan rotere med en hastighed, der afviger fra rotationshastigheden af transportsneglen eller med samme hastighed 25 som denne, men det karakteristiske ved dette kendte apparat er, at transportsneglen og formeelementet kan drives uafhængigt af hinanden.Canadian Patent No. 910,030 discloses a string press having a mold element of any cross-sectional shape; In the apparatus, the mold element is disposed independently of and immediately after the exit end of the conveyor screw. The molding element is arranged so that it is not rotated by the transport screw. It may be arranged so that it does not rotate, or it may rotate at a speed which differs from the rotational speed of the conveyor screw or at the same speed 25, but the characteristic of this known apparatus is that the conveyor screw and molding element can be operated independently of one another. .
Canadisk patentskrift nr. 1.031.934 omhandler et apparat til strengpresning af langstrakte genstande af beton, 30 hvor en fast tværplade er anbragt ind over tilgangsenden af formen, og hvor en konventionel transportsnegl benyttes til at presse betonen hen mod formen. Opfindelsen ifølge dette patentskrift angår dannelsen af betonlegemer med hulrum af forskellige størrelser. I apparatet ifølge dette patentskrift 35 roterer formeelementet ikke.Canadian Patent No. 1,031,934 discloses an apparatus for extruding elongated concrete articles 30 wherein a fixed transverse plate is inserted over the inlet end of the mold and where a conventional conveyor screw is used to push the concrete towards the mold. The invention according to this patent relates to the formation of concrete bodies with voids of various sizes. In the apparatus of this patent 35, the molding element does not rotate.
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22
Canadisk patentskrift nr. 1.100.297 angår en strengpresse af stort set tilsvarende type, men med et støtterør, således at armeringselementet kan indføres i den formede genstand. Også dette patentskrift beskriver et apparat med 5 en formsektion, hvori der findes et formeelement, og betonen presses gennem formen ved hjælp af en skruetransportør.Canadian Patent Specification No. 1,100,297 relates to a string press of substantially the same type but with a support tube so that the reinforcing element can be inserted into the shaped article. Also this patent specification describes an apparatus with a mold section in which there is a mold element and the concrete is pressed through the mold by means of a screw conveyor.
Tilsvarende apparater er beskrevet i SE-fremlæggel-sesskrift nr. 389.466, DE-offentliggørelsesskrift nr. 2.059.760 og US-patentskrift nr. 4.029.556. Disse apparater 10 har imidlertid de samme egenskaber, som de foran omtalte.Similar apparatus is disclosed in SE Publication Laid-Open No. 389,466, DE Publication Laid-Open No. 2,059,760 and U.S. Patent No. 4,029,556. However, these devices 10 have the same characteristics as those mentioned above.
De foran nævnte apparater bevæges i reglen langs en bane på hjul og ekstruderer det formede betonlegeme på oversiden af banen. Dette er muligt, fordi betonen er en forholdsvis stiv blanding, og naturligvis fordi moderne tekno-15 logi muliggør hurtig hærdning af betonen.The aforementioned appliances are usually moved along a track on wheels and extrude the shaped concrete body on the top of the track. This is possible because the concrete is a relatively rigid mixture and, of course, because modern technology allows for quick curing of the concrete.
De foran omtalte apparater har vist sig at være nyttige, men især nu om stunder, er det vigtigt at søge nye . veje, hvorved der kan anvendes en minimal mængde beton til at fremstille et element med passende styrke. I denne hen-20 seende kunne man muligvis sige, at alle kendte apparater er utilstrækkelige, fordi apparaternes konstruktion ikke tillader produktion af betonlegemer, hvor hulrummene udgør over en vis procentdel af tværsnitsarealet. Et forholdsvis stort hulrumstværsnit ville i virkeligheden være fuldt ud 25 acceptabelt ved fremstillingen af et legeme med passende styrke, men apparaterne, som er til rådighed, er ikke i stand til at fremstille sådanne legemer. Det ville f.eks. i visse tilfælde være ønskeligt at fremstille legemer, hvor hulrummet er forholdsvis dybt, men hvor ydervæggene indehol-30. der tilstrækkeligt materiale til at opfylde de konstruktionsmæssige krav, men der er opstået betydelige problemer ved forsøg på at fremstille sådanne legemer.The aforementioned appliances have proved to be useful, but especially nowadays, it is important to seek new ones. roads whereby a minimal amount of concrete can be used to produce an element of appropriate strength. In this regard, it could possibly be said that all known apparatus is insufficient because the construction of the apparatus does not allow the production of concrete bodies where the voids comprise a certain percentage of the cross-sectional area. In fact, a relatively large cavity cross section would be fully acceptable in the manufacture of a body of suitable strength, but the apparatus available is not capable of producing such bodies. It would, for example. in some cases it may be desirable to produce bodies where the cavity is relatively deep but which contains the outer walls. there is sufficient material to meet the design requirements, but considerable problems have arisen in attempting to manufacture such bodies.
Ved opfindelsen er det tilstræbt at tilvejebringe et apparat, med hvilket der kan fremstilles et hult betonlegeme 35 med optimalt tværsnit, dvs. under anvendelse af en minimal mængde beton til fremstilling af et legeme med den ønskedeIt is an object of the invention to provide an apparatus with which a hollow concrete body 35 of optimum cross section, i.e. using a minimal amount of concrete to make a body with the desired
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3 styrke.3 strength.
Dette er ifølge opfindelsen opnået ved at udforme apparatet som beskrevet i den kendetegnende del af krav 1.This is achieved according to the invention by designing the apparatus as described in the characterizing part of claim 1.
Det er i høj grad ønskeligt, at der findes en vibrator 5 i formeelementet. Det er også undertiden nyttigt, at anvende en vibratorplade på toppen af formen ovenover formeelementet.It is highly desirable that a vibrator 5 be present in the mold element. It is also sometimes useful to apply a vibrator plate to the top of the mold above the mold element.
Formeelementet bør i alt væsentligt være fri for nogen rampe ved sin underkant ved tilstrømningssiden og ved siderne. En rampe kan imidlertid tillades, forudsat at den 10 er kort. Dens længde må ikke overstige 25% af længden af formeelementet.The mold element should be substantially free of any ramp at its lower edge at the inflow side and at the sides. However, a ramp may be allowed provided it is 10 short. Its length must not exceed 25% of the length of the molding element.
Som det er almindeligt med kendte apparater af den omhandlede art, er det ønskeligt, at der findes flere formeelementer. Det første element er forsynet med en vibrator, 15 og de efterfølgende elementer vibreres ikke. Der er derfor et dæmpningsorgan mellem hvert formeelement.As is common with known apparatus of the kind in question, it is desirable that several molding elements be present. The first element is provided with a vibrator, and the subsequent elements are not vibrated. Therefore, there is a damping member between each molding element.
Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser en udførelsesform for apparatet ifølge 20 opfindelsen, fig. 2 et snit gennem apparatet ifølge opfindelsen, fig. 3 et snit efter linien 3-3 i fig. 2, og fig. 4 en detalje af det i fig. 2 og 3 viste apparat.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 shows an embodiment of the apparatus according to the invention; FIG. 2 is a section through the apparatus according to the invention; FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, and FIG. 4 is a detail of the embodiment of FIG. 2 and 3.
Fig. 1 viser en strengpresse 10 og en blok 12, som 25 er ekstruderet fra maskinen ud på et fodstykke og en bane 14. Apparatet har en tragt 16, gennem hvilken beton tilføres til apparatet 10, og en elektromotor 18 til rotation af skruetransportører 20 og 22, der er vist nærmere i fig. 2 og 3. Apparatet 10 har hjul 24, hvorpå det kan køre hen 30 langs oversiden af banen 14.FIG. 1 shows a string press 10 and a block 12 extruded from the machine onto a base and web 14. The apparatus has a hopper 16 through which concrete is fed to the apparatus 10, and an electric motor 18 for rotating screw conveyors 20 and 22 shown in FIG. 2 and 3. The apparatus 10 has wheels 24 on which it can travel 30 along the upper surface of the track 14.
Fig. 2 viser apparatet mere detaljeret. De roterbare skruetransportører 20 og 22 strækker sig i længderetningen i en form 26. Betonen tilføres gennem tragten 16 og apparatet bevæger sig fremad efterhånden som skruetransportørerne 35 presser beton mod den allerede formede genstand. Et indvendigt hulrum udformes i den strengpressede genstand. I denFIG. 2 shows the apparatus in more detail. The rotatable screw conveyors 20 and 22 extend longitudinally in a mold 26. The concrete is fed through the hopper 16 and the apparatus moves forward as the screw conveyors 35 push concrete against the already formed object. An internal cavity is formed in the extruded article. In it
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4 viste udførelsesform har det indre hulrum en højde, der er fastlagt ved dets stilling under dannelsen, som er større end dets bredde, men dette er ikke væsentligt. Ved opfindelsen fremstilles faktisk genstande med forholdsvis store 5 hulrum sammenlignet med, hvad der er tilfældet ved anvendelse af kendte apparater. Hulrummenes tværsnitsstørrelse kan gøres stor ved at de strækker sig opad eller i sideretningen i en grad, som ikke er mulig ved kendte apparater. Dette er ved opfindelsen opnået ved tilvejebringelse af formeelementer 10 28, 30 og 32 som hver med deres nederste kant ligger på linie med en nederste kant af transportøren, som det især fremgår af fig. 2. Det bemærkes imidlertid at de samme resultater kan opnås, hvis formeelementernes nederste kant ligger under den nederste kant på transportøren, forudsat at ikke 15 mere end 10% af formeelementets totale højde ligger under den nederste kant på transportøren. Den langsgående centerlinie A gennem elementerne ligger højere end centerlinien B . gennem transportøren, som det specielt er vist i fig. 4, og en rampe 34 strækker sig, som vist i fig. 2 og 4 opad fra 2 0 afgangsenden af transportørerne 20 og 22, dvs. nær ved den ende af transportøren, som ligger inden i formen 26.4, the inner cavity has a height determined by its position during formation which is greater than its width, but this is not significant. In fact, the invention produces articles with relatively large cavities compared with the case of known apparatus. The cross-sectional size of the cavities can be made large by extending upwards or laterally to a degree which is not possible with known apparatus. This is achieved by the invention by providing molding elements 10 28, 30 and 32, each with their lower edge aligned with a lower edge of the conveyor, as can be seen in particular in FIG. 2. However, it should be noted that the same results can be obtained if the lower edge of the molding elements is below the lower edge of the conveyor, provided that not more than 10% of the total height of the molding element is below the lower edge of the conveyor. The longitudinal center line A through the elements is higher than the center line B. through the conveyor, as shown particularly in FIG. 4, and a ramp 34 extends, as shown in FIG. 2 and 4 upwards from the departure end of the conveyors 20 and 22, i.e. near the end of the conveyor which is within the mold 26.
Apparatet har på sædvanlig måde en hovedramme 36 med sideelementer 38 og tværelementer 40. En monteringsramme 42 er anbragt på sideelementerne 48 og strækker sig hen over 25 apparatet. Denne monteringsramme 42 kan indstilles i retning opad og nedad ved hjælp af bolte 44. Hovedrammen 36 har hjul 24, som kører på skinner på banen 14, men det er også nødvendigt at forhindre afgangsenden af apparatet i at løfte sig under arbejdet, hvorfor hjul 46 er indrettet til at 30 gribe ind under underkanten af sideelementerne 36, som vist i fig. 2, for at hindre, at apparatet eventuelt løfter sig.The apparatus has in the usual manner a main frame 36 with side elements 38 and transverse elements 40. A mounting frame 42 is arranged on the side elements 48 and extends over the apparatus. This mounting frame 42 can be adjusted upwards and downwards by means of bolts 44. The main frame 36 has wheels 24 which run on rails on the track 14, but it is also necessary to prevent the departure end of the apparatus from lifting during work, so wheels 46 is arranged to engage the lower edge of the side members 36, as shown in FIG. 2 to prevent the device from lifting.
I stedet for disse hjul kan anvendes vægte, som anbringes ved afgangsenden af apparatet. På tegningen er vist to skruetransportører 20 og 22, men det vil forstås, at der kan 35 anvendes et andet antal transportører. Hver transportør er ved sin ene ende lejret i et passende leje 48, der bæres afInstead of these wheels, weights can be used which are placed at the outlet end of the apparatus. In the drawing, two screw conveyors 20 and 22 are shown, but it will be understood that a different number of conveyors can be used. Each conveyor is enclosed at one end in a suitable bearing 48 to be supported
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5 monteringsrammen 42. Hver transportør består af en vinge eller fremføringsskovl 50, som er fastgjort på eller udformet ud i et med en hul aksel 52. Som det især ses af fig. 4 har den hule aksel 50 en lige sektion, som strækker sig over en 5 del af transportørens længde, og en sektion, som vokser i tykkelse hen mod afgangsenden. Akselen kan imidlertid også have et konstant tværsnit.5 is mounted on a mounting frame 42. Each conveyor consists of a vane or drive vane 50 which is secured to or formed in one with a hollow shaft 52. As can be seen in particular from FIG. 4, the hollow shaft 50 has a straight section which extends over a portion of the length of the conveyor and a section which grows in thickness towards the outlet end. However, the shaft may also have a constant cross-section.
Transportøren 20 drejes i sit leje 48 ved hjælp af et kæde- og kædehjulsaggregat 54, der trækkes af elektromo-10 toren 18, som er monteret på armen 42. Den anden transportør 22 kan være forsynet med en særskilt elektromotor, men den drives fortrinsvis af den samme elektromotor 18 over tandhjulet 56 og et kæde- og kædehjulsaggregat 58, som sikrer at de to transportører 20 og 22 roterer i modsatte retninger.Conveyor 20 is rotated in its bearing 48 by means of a sprocket and sprocket assembly 54 which is pulled by the electromotor 10 mounted on the arm 42. The second conveyor 22 may be provided with a separate electric motor, but it is preferably driven by the same electric motor 18 over the sprocket 56 and a sprocket and sprocket assembly 58 which ensures that the two conveyors 20 and 22 rotate in opposite directions.
15 Formeelementerne 28, 30 og 32 er alle monteret på en aksel 60, som strækker sig gennem den hule aksel 52. Det første formeelement 28 med rampen 34 er fastgjort til enden af denne indvendige aksel. De øvrige elementer 30 og 32 er så sammenboltet successivt, idet det første af disse elemen-20 ter er fastboltet til det med rampe forsynede element 28 ved hjælp af bolte 62, som også er i indgreb med dæmpningsorganer 64. Dette skyldes at det første formeelement 28 er forsynet med en vibrator 66, der trækkes af en elektromotor 68 over en indre aksel 70. Vibratoren, som er en simpel 25 excentrik, beskrives ikke nærmere her, da den er velkendt indenfor den her omhandlede teknik. Det bemærkes også, at en ekstra vibrator 72 kan være anbragt på toppen af apparatet som vist i fig. 2. Heller ikke konstruktionen af denne vibrator 72 beskrives nærmere, da den er konventionel.The molding elements 28, 30 and 32 are all mounted on a shaft 60 extending through the hollow shaft 52. The first molding member 28 with the ramp 34 is attached to the end of this inner shaft. The other elements 30 and 32 are then bolted successively, the first of these elements being bolted to the ramp element 28 by means of bolts 62 which are also engaged with damping means 64. This is because the first molding element 28 is provided with a vibrator 66 which is pulled by an electric motor 68 over an inner shaft 70. The vibrator, which is a simple eccentric, is not further described here, as it is well known in the art. It is also noted that an additional vibrator 72 may be mounted on the top of the apparatus as shown in FIG. 2. Also, the construction of this vibrator 72 is not further described as it is conventional.
30 Bredden af blokken eller genstanden 12, som skal fremstilles, kan reguleres ved hjælp af sideplader 74, der er monteret på modstående sider af formen 26. Sidepladerne 74 er indstillelige på sideelementerne 38 ved hjælp af bolte 76. På tilsvarende måde kan højden af formen 26 reguleres ved 35 hjælp af en øvre plade 78, der er anbragt på toppen af formsektionen, og indstillelige bolte 80 på sædvanlig måde.The width of the block or article 12 to be manufactured can be controlled by side plates 74 mounted on opposite sides of the mold 26. The side plates 74 are adjustable on the side elements 38 by bolts 76. Similarly, the height of the mold can be adjusted. 26 is adjusted by means of an upper plate 78 disposed on the top of the mold section and adjustable bolts 80 in the usual manner.
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66
Som foran antydet kan stillingen af formeelementerne i formen indstilles ved hjælp af bolte 44.As indicated above, the position of the mold elements in the mold can be adjusted by means of bolts 44.
Under drift tilføres beton til skruetransportørerne 20 og 22 gennem tragten 16. Betonen presses over formeelemen-5 terne 28, 30 og 32 ind i formen 26 ved hjælp af skruetransportørerne. Apparatet bevæges fremad ved reaktionskraften fra den endnu flydende beton mod de formede overflader i formeelementet, og apparatet bevæges herved på hjulene 24 og afsætter de formede elementer 12 som vist i fig. 1.In operation, concrete is supplied to the screw conveyors 20 and 22 through the hopper 16. The concrete is pressed over the mold elements 5, 28, 30 and 32 into the mold 26 by means of the screw conveyors. The apparatus is moved forward by the reaction force of the still flowing concrete towards the formed surfaces of the molding element, and the apparatus is thereby moved on the wheels 24 and deposits the shaped elements 12 as shown in FIG. First
10 På grund af den anvendte beton hærder produktet meget hurtigt, og det er selvbærende praktisk taget umiddelbart efter dannelsen. Vibratoren 66 i det første formeelement sikrer, at betonen strømmer jævnt rundt om formeelementerne.10 Because of the concrete used, the product hardens very quickly and it is self-supporting practically immediately after formation. The vibrator 66 in the first mold element ensures that the concrete flows evenly around the mold elements.
Det er især en fordel ved opfindelsen, at der kan 15 fremstilles genstande med forholdsvis store hulrum f.eks. med en betydelig højde i forhold til højden af genstanden. Dette er blevet muligt ved, at centerlinien B gennem skruetransportøren ligger lavere end centerlinien A gennem formen, ved tilvejebringelsen af den skrå rampe 34 ovenpå det første 20 formeelement 28 og ved fravær af nogen rampe af betydning på undersiden af formeelementet. Det er også ønskeligt, at der ikke findes nogen rampe på de nederste hjørner eller sider af formeelementet under den langsgående akse gennem skruetransportøren, således som vist i fig. 4. Imidlertid 25 kan en lille rampe tillades, forudsat at den ikke har nogen stor længde eller højde og ikke overstiger 25% af formeele-mentets længde.In particular, it is an advantage of the invention that articles with relatively large voids can be made e.g. with a significant height relative to the height of the object. This has been made possible by the center line B through the screw conveyor being lower than the center line A through the mold, by providing the inclined ramp 34 on top of the first 20 mold member 28 and in the absence of any ramp of importance on the underside of the mold member. It is also desirable that no ramp be found on the lower corners or sides of the molding element under the longitudinal axis through the screw conveyor, as shown in FIG. 4. However, a small ramp may be allowed provided it has no great length or height and does not exceed 25% of the length of the molding element.
Ved opfindelsen er det blevet muligt på økonomisk måde at producere betonlegemer med samme styrke som legemer, 30 der er fremstillet på kendte apparater, men under anvendelse af en mindre mængde beton.By the invention, it has become possible to economically produce concrete bodies with the same strength as bodies made on known apparatus, but using a smaller amount of concrete.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32364881A | 1981-11-20 | 1981-11-20 | |
| US32364881 | 1981-11-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK518082A DK518082A (en) | 1983-05-21 |
| DK158073B true DK158073B (en) | 1990-03-26 |
| DK158073C DK158073C (en) | 1990-08-20 |
Family
ID=23260109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK518082A DK158073C (en) | 1981-11-20 | 1982-11-19 | DEVICE FOR STRENGTHING OF EXTENSIVE CONCRETE TOPICS |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0080333B1 (en) |
| JP (1) | JPS58131020A (en) |
| KR (1) | KR860001642B1 (en) |
| AT (1) | ATE25349T1 (en) |
| AU (1) | AU539819B2 (en) |
| CA (1) | CA1193834A (en) |
| DE (1) | DE3275360D1 (en) |
| DK (1) | DK158073C (en) |
| EG (1) | EG15859A (en) |
| FI (1) | FI71088C (en) |
| IE (1) | IE53675B1 (en) |
| IN (1) | IN157614B (en) |
| MX (1) | MX157583A (en) |
| NO (1) | NO157289C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102514B (en) * | 1985-04-08 | 1986-11-05 | 核工业部建筑机械开发公司 | Single slab compression of prestressed concrete hollow slab |
| US5123831A (en) * | 1991-05-16 | 1992-06-23 | Esa Enqvist | Concrete extrusion machine |
| CA2204978A1 (en) * | 1997-05-09 | 1998-11-09 | Ultra Span Technologies Inc. | Low noise hollow core slab extruder |
| EP0968799A1 (en) * | 1998-07-01 | 2000-01-05 | Euromac S.r.l. | Extruder for products in reinforced concrete |
| FI19991792A (en) * | 1999-08-23 | 2001-02-24 | Valkeakoski Extec Oy Ltd | Method and arrangement for making a concrete product and a series of concrete products |
| FI20021092A (en) * | 2002-06-07 | 2003-12-08 | Consolis Technology Oy Ab | Process and apparatus for casting concrete products |
| FI121943B (en) | 2007-11-21 | 2011-06-15 | Outotec Oyj | dispenser |
| CN103158190B (en) * | 2013-03-28 | 2015-09-09 | 南京益生宜居建筑材料科技有限公司 | The core rod extruding use in storehouse of Extruder for concrete core slab |
| CN103171031B (en) * | 2013-03-28 | 2015-06-24 | 南京益生宜居建筑材料科技有限公司 | Continuous production method for concrete hollow slab |
| CN103171030B (en) * | 2013-03-28 | 2015-09-09 | 南京益生宜居建筑材料科技有限公司 | Concrete core slab continuous extruder |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3159897A (en) * | 1961-07-10 | 1964-12-08 | Fredrick G Ellis | Machine for extruding hollow cored concrete sections |
| CA910030A (en) * | 1969-12-04 | 1972-09-19 | Putti George | Extrusion machine for making articles of cement-like material |
| US3926541A (en) * | 1970-06-29 | 1975-12-16 | Frederick M Hewitt | Extruder with interacting auger and care means |
| GB1454050A (en) * | 1974-02-11 | 1976-10-27 | Spiroll Corp Ltd | Pile extruder |
| US3904341A (en) * | 1975-08-29 | 1975-09-09 | Dyform Concrete Prestressed Lt | Machine for extruding cement-like material into articles |
| CA1100297A (en) * | 1977-10-28 | 1981-05-05 | Norman W. Bunn | Reinforcing member support in concrete extruders |
| JPS583801B2 (en) * | 1979-09-12 | 1983-01-22 | ダイフオ−ム・エンジニアリング・リミテツド | concrete extrusion molding machine |
-
1982
- 1982-05-21 FI FI821813A patent/FI71088C/en not_active IP Right Cessation
- 1982-11-08 IE IE2664/82A patent/IE53675B1/en not_active IP Right Cessation
- 1982-11-16 EG EG679/82A patent/EG15859A/en active
- 1982-11-18 EP EP82306152A patent/EP0080333B1/en not_active Expired
- 1982-11-18 AU AU90711/82A patent/AU539819B2/en not_active Expired
- 1982-11-18 KR KR8205217A patent/KR860001642B1/en active
- 1982-11-18 NO NO823868A patent/NO157289C/en not_active IP Right Cessation
- 1982-11-18 AT AT82306152T patent/ATE25349T1/en not_active IP Right Cessation
- 1982-11-18 DE DE8282306152T patent/DE3275360D1/en not_active Expired
- 1982-11-19 MX MX195260A patent/MX157583A/en unknown
- 1982-11-19 JP JP57203549A patent/JPS58131020A/en active Granted
- 1982-11-19 DK DK518082A patent/DK158073C/en not_active IP Right Cessation
- 1982-11-19 IN IN1354/CAL/82A patent/IN157614B/en unknown
- 1982-11-22 CA CA000416082A patent/CA1193834A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR860001642B1 (en) | 1986-10-15 |
| NO157289C (en) | 1988-02-24 |
| IN157614B (en) | 1986-05-03 |
| FI821813A0 (en) | 1982-05-21 |
| JPS58131020A (en) | 1983-08-04 |
| JPS6315122B2 (en) | 1988-04-04 |
| DK158073C (en) | 1990-08-20 |
| EP0080333A3 (en) | 1984-10-17 |
| EG15859A (en) | 1986-12-30 |
| KR840002290A (en) | 1984-06-25 |
| AU539819B2 (en) | 1984-10-18 |
| NO823868L (en) | 1983-05-24 |
| DK518082A (en) | 1983-05-21 |
| IE53675B1 (en) | 1989-01-04 |
| FI821813A (en) | 1983-05-21 |
| AU9071182A (en) | 1983-05-26 |
| MX157583A (en) | 1988-12-02 |
| EP0080333B1 (en) | 1987-02-04 |
| EP0080333A2 (en) | 1983-06-01 |
| CA1193834A (en) | 1985-09-24 |
| FI71088C (en) | 1990-02-13 |
| NO157289B (en) | 1987-11-16 |
| IE822664L (en) | 1983-05-20 |
| ATE25349T1 (en) | 1987-02-15 |
| DE3275360D1 (en) | 1987-03-12 |
| FI71088B (en) | 1986-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |