SE192960C1

SE192960C1 -

Info

Publication number: SE192960C1
Application number: SE1306362A
Authority: SE
Original assignee: Technifoam Corporation
Priority date: 1961-12-05
Filing date: 1962-12-04
Publication date: 1964-11-24
Also published as: ES286014A1; CH405221A; CH423213A; ES283078A1; LU42807A1; DE1296791B; BE625615A; GB1031753A; DK105265C; NL286346A; CH413770A

Description

Uppfinnare: W P Voelker Prioritet begttrd fran den 5 december 1961 (USA) Foreliggande uppfinning hanfor sig till apparatur och salt att jamna ut och dosera ytbelaggningsmaterial, som paforts en Ripande materialbana. Inventor: W P Voelker Priority Applied From December 5, 1961 (USA) The present invention relates to apparatus and salt for leveling and dosing coating materials, which is a scratched web of material.

Hitintills ha belaggningsmaskiner vanligen haft avstrykningsknivar for att jamna ut och reglera tjockleken pa de ytbetaggningsmate- rial, som paloras en lopande materialbana. Warm avstrykningsknivar ha varit bra for manga belaggningsmaterial. Belaggning med material, som forandra sina egenskaper med tiden, kan emellertid ej utforas pa tillfre.dsstallande salt, nar man anvander en vanlig ,avstrykningskniv, darfor att .ganunalt belaggningsmaterial, som anhopar sig pa kniven, paverkar renhetsgraden pa det belaggningsmaterial, som pafores den frammatade materialbanan. Until now, coating machines have usually had wiping knives to even out and regulate the thickness of the surface coating materials, which are painted a continuous web of material. Warm wiping knives have been good for many coating materials. Coating with materials which change their properties over time, however, can not be applied to satisfactory salt when using an ordinary, scraping knife, because ordinary coating material which accumulates on the knife affects the degree of purity of the coating material applied to it. fed the web of material.

Enligt foreliggande uppfinning regleras och/eller utjam.nas belaggningsmaterialet fir framstallning av plastskum genom inverkan av en pneumatisk anardning, som leder en strom av gas mot belaggningens yta. I som_liga fall stoter gasstrommen tillbaka belaggningsmaterialet och i andra fall hailer den tillbaka flodet av belaggningsmaterial. Vid nagra utforingsformer av uppfinningen kunna en mangd gasmunstycken Tikta en mingfald gasstralar mot belaggningsmaterialets yta. Vid andra utforingsformer av uppfinningen flyter gasstrommen genom en diffusor, sa att en bred och tunn gasstrom bildas. Vid de heist anvanda utforingsformerna tjanstgOr en poros platta som kontrollargan for den gasstrom, som lamnar anordningarna for pneumatisk utjamning. According to the present invention, the coating material for the production of plastic foam is regulated and / or leveled by the action of a pneumatic device which conducts a stream of gas towards the surface of the coating. In some cases, the gas stream pushes back the coating material and in other cases it hauls back the flow of coating material. In some embodiments of the invention, a plurality of gas nozzles may direct a plurality of gas jets toward the surface of the coating material. In other embodiments of the invention, the gas stream flows through a diffuser, so that a wide and thin gas stream is formed. In the most commonly used embodiments, a porous plate serves as the control means for the gas stream which leaves the pneumatic equalization devices.

Uppfinningen klargOres ytterligare av de bifogade figurer, som visa nagra fa av de mojliga varianter av pneumatiska utjamningsknivar. Fig. 1 Or en schematisk bihld av en ma-skin for framstallning av plastskum, dar pneumatisk utjamningsanordningar anvandas. The invention is further elucidated by the accompanying figures, which show some of the possible variants of pneumatic leveling knives. Fig. 1 is a schematic diagram of a machine for producing plastic foam, in which pneumatic leveling devices are used.

Fig. 2 visar ett snitt av en del av fig. 1. Fig. 3 ãr dels ett partiellt snitt av och .dels en perspektivbild av en utjamningsanordning av diffusartyp. Fig. 4 och 5 aro bilder av en utforandeform dar man anvander ett Herta' stralmunstycken. Fig. 4 ár en bild delvis i snitt och fig. 5 Or en Mid tagen efter linjen 5-5 i fig. 4. Fig. 2 shows a section of a part of Fig. 1. Fig. 3 is partly a partial section of and partly a perspective view of a leveling device of diffuser type. Figs. 4 and 5 are views of an embodiment using a Herta jet nozzle. Fig. 4 is a view partially in section and Fig. 5 is a view taken along line 5-5 of Fig. 4.

Hanvisning Ores nu till fig. 1 och 2, i vilka man schematiskt visar dels ett satt att utfora arbetet och dels en .skumplastmaskin 10, dar en materialbana 11 Riper fran en forradsrulle 12 genom en belaggningszon 13, doseringszon 14, expansionszon 15, hardnin.gszon 16 och en zan 17 for produktuttag. Materialbanan 11 kan vara av papper, tyg, plastfilm, plywood eller annat tunt material, soul ar lampligt fOr belaggning. Referring now to Figures 1 and 2, there is schematically shown both a method of performing the work and a foam machine 10, where a web of material 11 scratches from a supply roll 12 through a coating zone 13, dosing zone 14, expansion zone 15, hardnin. gszon 16 and a zan 17 for product extraction. The web of material 11 can be of paper, fabric, plastic film, plywood or other thin material, soul is suitable for coating.

Speciell uppmarksamhet riktas ph en pneumatisk regleringsanordning 18, som bestar av en tank 19 med en tryckkammare 20. Komprimerad gas, vanligtvis luft, tillfores fran ett forrad 21, som är anslutet till tanken 19 via en slang 22. Den komprimerade luften strommar fran tryckkammaren mot belaggningsL materialet 25 via en poros platta: 23. Luftstrommen fran den porosa plattan 23 strom- mar bakat, dvs. i motsatt riktuing met den frammatade pappersbanans rkelseriktning. Particular attention is paid to a pneumatic control device 18, which consists of a tank 19 with a pressure chamber 20. Compressed gas, usually air, is supplied from a supply 21, which is connected to the tank 19 via a hose 22. The compressed air flows from the pressure chamber towards coating material 25 via a porous plate: 23. The air stream from the porous plate 23 flows backwards, i.e. in the opposite direction to the direction of movement of the fed paper web.

Pafdringsanordningen 24 lagger ph en belagg- ning med forutbestamd tjocklek pa den frammatade banan 11 och det belaggningsmaterial, sam pa sa satt har paforts, omvandlas i ex-, pansionszonen 15 och hardningszonen 16 till skumplast, som tages ut ur zonen 17 Mr pro- dukturtag. Regleringszonen 14 utfor finjuste- ring av belaggningens 25 locklek. Lampliga automatiska regulatorer kunna anskaffas for ati reglera flodet pa belaggningsmaterialet till paforingsanardningen 24 sa att man automatiskt hkller bestamd tjocklek p5 materialet. Mellan paforingsanordningen 24 och den 2— — pneumatiska regleringsanordningen 18 hopar sig en bank 26 av belaggningsmaterial 25, vars storlek varierar alit efter overskottet. Den automatiska regleringen pa tjockleken stalles in sa, att man uppratthaller mangden belaggningsmaterial 25 i hanken 26 inom ett f5rutbestamt omrade. Belaggningen pafares banan 11, da denna passerar under paforingsanordningen 24. Nar banan 11 maths fram genom omradet, dar materialhogen 26 befinner sig, utsfittes belaggningen for kraften framat Iran den framlopande materialbanan och for kraften Iran gasstrommen fra.n den pneumatiska regleringsanordningen 18, som tvingar overskott av belaggningsmaterial bakat. Den frammatade materialbanan loper under den pneumatiska regleringsanordningen 18, tjockleken. pabelaggningsmaterialet regleras till forutbestamd storlek, varigenom en enhetlig produkt kan tagas ut vid zonen 17 for produktuttag. The coating device 24 lays a coating of predetermined thickness on the fed web 11 and the coating material, which has been applied in this way, is converted in the expansion, expansion zone 15 and hardening zone 16 into foam plastic, which is taken out of zone 17. . The control zone 14 performs fine adjustment of the cover play of the coating 25. Suitable automatic regulators can be obtained to control the flow of the coating material to the lining device 24 so that a certain thickness of the material is automatically maintained. Between the paving device 24 and the 2 - - pneumatic control device 18 a bank 26 of coating material 25 accumulates, the size of which varies alit according to the excess. The automatic thickness adjustment is set so that the amount of coating material 25 in the handle 26 is maintained within a predetermined area. The coating is applied to the web 11 as it passes under the feed device 24. When the web 11 is fed through the area where the material pile 26 is located, the coating is replaced by the force forward Iran the advancing material web and by the force Iran gas stream from the pneumatic control device 18, which forces excess coating material baked. The material web fed runs under the pneumatic control device 18, the thickness. the packaging material is regulated to a predetermined size, whereby a uniform product can be taken out at the zone 17 for product extraction.

Funktioneringen far regleringsanordningen 18 for att uppratthalla jamn tjocklek pa belaggningsmedelskompositionen liknar funktioneringen for en avskraparkniv, som Or placerad sa, att den forhindrar overskott av belaggningsmedel att bryta genom den barriar, som Midas av avskraparkniven, men den tillhandahaller Oven ett litet reservforrad for att tillfredsstalla behovet av material for det frammatade papperet. Oavsett att det automatiska regleringsystemet och paforingsa.nordningen 24 hialpas At att uppratthalla jamn tjocklek, Ora dock de oundvikliga sma underskotten i tillforseln och oregelbundenheterna i flodet av belaggningsmaterial finjusteringen av doseringsanordningen 18 nodvandig. pa ovan beskrivna satt uppratthalles alltsa den likformiga, formbestandiga tjockleken omedelbart framfOr doseringsanordningen. The operation of the control device 18 to maintain a uniform thickness of the coating composition is similar to the operation of a scraper blade, which is positioned so as to prevent excess coating agent from breaking through the barrier midas of the scraper blade, but it also provides a small reserve to satisfy of material for the fed paper. Irrespective of the fact that the automatic control system and the paving device 24 are helped to maintain a uniform thickness, the inevitable small deficits in the supply and irregularities in the flow of coating material are necessary to fine-tune the dosing device 18. in the manner described above, the uniform, shape-resistant thickness is thus maintained immediately in front of the dosing device.

I den modifierade utforingsform, som visas i fig. 3 belagges en frammatad materialbana 111 med ,ett material, som kan omvandlas till skumplast 125. F5r att halla tjockleken pa belaggningen vid bestamd storlek anvandas en mangd regleringsanordningar 1 Overensstammelse med tidigare erfarenhet. PA sa sag regleras den ursprungliga mangden belaggningsmedal, som paforts den frammatade banan automatiskt, sa att man i huvudsak erhaller den onskade tjockleken pa belaggningen och en sadan reglering utgor det automatiska kentrallsystemets arbetsuppgift. Vissa tidsefterslapningar Oro oundvikliga. I verksamheten for ett sadant regleringssystem och den slutliga justeringen av tjockleken p0 belaggningen gores av regleringsanordningen 118. Den komprimerade luftstralen fran anordningen 118 utovar ett ba.katriktat tryck pa materialbanken 126 av overskottet av belaggningsmaterial, som har en hojd, som Or st8rre an den foruthestamda tjockleken. Denna kraft stiger oavbrutet, nar materialbanken 126 kommer narmare anordningen 118. Del Or ocksa for delaktigt att lagga p0 ett mattligare tryck, nar materialhogen endast r foga storre On vad man bestamt vara optimalt, men daremot ett mycket starkare tryck, nar materialhogen Or mycket storre On optimal storlek. Delta Or I synnerhet betydelsefullt, nar arbetet utfores i extremt hog takt med det automatiska regleringssystemet stdende i paverkan av storleken ph materialhogen 126. Aven cm det Or enklast att hanvisa till den pneumatiska anordningen 118 sasom bestammande for hojden pa materialbanken 126, bar del sti klart, att djupet pa materialbanken 126, laget framat eller bakat och mangden material i materialbanken paverkas av denna anordning. Ju lagre material materialbanken ar desto mind-re Or den mangd belaggningsmedel, som finns i derma, och ju h5gre den Or, desto starre mangd bindemedel finns i den. Den. komprimerade gasen strommar frail en tryckkammare 120 genom en tang trang slits med en bank 126 av overskott av belaggningsmaterial. fungerar den pneumatiska regleringsanordningen 118 pa liknande salt som den pneumatiska regleringsanordningen 18 i fig. 1. Trycldmmmaren forses med komprimerad gas genom en slang 122, som gar till en tank 119. In the modified embodiment shown in Fig. 3, a fed web of material 111 is coated with a material which can be converted to foam 125. To maintain the thickness of the coating at a certain size, a variety of control devices are used in accordance with previous experience. In this way, the original amount of coating medium, which is applied to the fed web automatically, is regulated so that the desired thickness of the coating is essentially obtained, and such regulation constitutes the task of the automatic central system. Some time delays Concerns inevitable. In the operation of such a control system and the final adjustment of the thickness of the coating is made by the control device 118. The compressed air jet from the device 118 exerts a basal pressure on the material bank 126 of the excess coating material which has a height greater than the predetermined the thickness. This force increases continuously when the material bank 126 approaches the device 118. Part Or also participates in applying a duller pressure, when the material pile is only greater than what was determined to be optimal, but on the other hand a much stronger pressure, when the material pile Or is much larger. On optimal size. Delta Or Particularly important, when the work is carried out at an extremely high rate with the automatic control system standing under the influence of the size of the material pile 126. Although it is easiest to refer to the pneumatic device 118 as determining the height of the material bank 126, part should be clear , that the depth of the material bank 126, the layer forward or backward and the amount of material in the material bank are affected by this device. The lower the material, the smaller the amount of coating agent contained in it, and the higher the Or, the greater the amount of binder present in it. The. The compressed gas flows from a pressure chamber 120 through a pliers narrow slot with a bank 126 of excess coating material. the pneumatic control device 118 operates on similar salt as the pneumatic control device 18 in Fig. 1. The pressure damper is supplied with compressed gas through a hose 122 which goes to a tank 119.

Vid den utfOrandeform av uppfinningen, som visas i fig. 4 och 5, riktas en mangd gasstralar mat overskottet av belaggningsmaterial i banken 226, da denna passerar under gasstralarna. Nar materialbanan 211 matas fram genom regleringszonen 214, Killer den komprimerade gasen fran dess gasstralar tillbaka rorelsen framat (och alltsa hajden och storleken) hos en bank 226 bestaende av Overskott av belaggningsmaterial 225 pa den frammatade materialbanan 211. Alltsa. arbetar den. pneumatiska regleringsanordningen 218 i fig. 4 och 5 i storsta allmanhet pa samma salt som vid de utforandeformer, som visas i fig. 1 och 3. En konsol 230 tjanstgor som monteringsplats far ett flertal fasten 231, vilka Oro fastsatta med justerbara skruvar 232. PA varje faste 231 finnes en ring 233 med ett flertal justeringsskruvar 234, som hMla ,ett munstyeke 235 i onskat lage. Komprimerad gas tillfores .munstycket genom en slang 222. In the embodiment of the invention shown in Figures 4 and 5, a plurality of gas jets are directed at the excess coating material in the bank 226 as it passes under the gas jets. As the material web 211 is fed through the control zone 214, the compressed gas from its gas jets kills back the forward motion (and thus the height and size) of a bank 226 consisting of excess coating material 225 on the feed material web 211. Thus. it works. the pneumatic control device 218 in Figs. 4 and 5 is generally on the same salt as in the embodiments shown in Figs. 1 and 3. A bracket 230 serves as a mounting location for a plurality of fasteners 231, which are fixed with adjustable screws 232. PA each fixed 231 is a ring 233 with a plurality of adjusting screws 234, such as hMla, a nozzle 235 in the desired position. Compressed gas is supplied to the nozzle through a hose 222.

Den pneumatiska regleringsanordningen enligt foreliggande uppfinning Or lamplig att anvandas vid kontroll av tjockleken, antingen pa ett plastskum eller pa en reaktiv blandning, som ar anpassad att omvandlas till ett plastskum, och denna allsidighet Or viktig i vissa fabriker. Teltniker, som Aro valbekanta med polyuretanskum, kanna val till, att sjalvskummande kompositioner besta av blandningar av diisocyanater och polyoler. Det Or Oven valbekant for dem, att plastskum tillverkas genom att slappa pa trycket i en komposition, kannetecknad av att den har en gas under Mgt tryck lost I en. flytande komposilion, som latt kan omvandlas till en plast, som Or tiltrackligt stark f8r att bibehalla den — —3 expanderade skumstrukturen. Framstallning av handelsfort kramskum ,genom att slappa pa trycket i en plastkram med gas under tryck ,ett val ka.nt exempel pa skumtillverkning, men plastskummen skilja sig Iran denna pa sa satt, att bestandsdelarna i ett plastskum latt omvandlas till ett material med avsevard styrka. The pneumatic control device according to the present invention is suitable for use in controlling the thickness, either on a plastic foam or on a reactive mixture, which is adapted to be converted into a plastic foam, and this versatility is important in some factories. Tent technicians, such as Aro, who are familiar with polyurethane foam, can choose to make self-foaming compositions consisting of mixtures of diisocyanates and polyols. It is also well known to them that plastic foam is made by releasing the pressure in a composition, characterized in that it has a gas under high pressure dissolved in it. liquid composition which can be easily converted into a plastic which is sufficiently strong to maintain the expanded foam structure. Production of commercial fast foam foam, by relaxing the pressure in a plastic hug with gas under pressure, a choice can be an example of foam production, but the plastic foams differ from this in that the constituents of a plastic foam are easily converted to a material of considerable strength .

Olika andringar kunna goras vid tillampningen av foreliggande uppfinning utan aft avvika frau innehallet i hifogade patentansprak, och de exempel, som givits har, aro enbart avsedda att askadliggara nagra lampliga utforandeformer ay uppfinningen. Various modifications may be made in the practice of the present invention without departing from the scope of the appended claims, and the examples which have been given are intended solely to ascertain any suitable embodiments of the invention.

Claims

Patentansprfik:Patent claim:

1. Satt att reglera tjockleken hos ett beläggningsmaterial pa en lopande materialbana for att likforrnigt uppratthalla en forutbestamd tjocklek, kannetecknat darav, att det omf altar foljande arbetsmoment: paforande pa en lopande materialbana av ett belaggningsmaterial, vars bestandsdelar ha sadan sammansattning, att de kunna omvandlas till ett plastskum; frammatning av den pa sh salt ylbelagda materialbanan genom en regleringszon, i vilken en strom av komprimerad gas riktas bakat mot materialflodet for aft uppratthalla en bank ay overskottsmaterial, samtidigt som man. uppratthaller atminstone ett skikt komprimerad gas mellan ytbelaggningskompositionen och varje yta ph de anardningar, som rikta den komprimerade gasstrommen mot materialbanken, varvid tjockleken pa belaggningen amedelbart framfor derma materialbank regleras for att likfor migt kunna uppratthalla en bestarnd tjocklek pa belaggningen med hjalp av denna gasstrom.1. Set to control the thickness of a coating material on a continuous web of material in order to uniformly maintain a predetermined thickness, characterized in that it comprises the following operations: applying on a running web of material a coating material whose constituents have such a composition that they can be composed to a plastic foam; feeding the salt-coated web of material through a control zone, in which a stream of compressed gas is directed backwards towards the flow of material to maintain a bank of excess material, at the same time as one. maintains at least one layer of compressed gas between the surface coating composition and each surface of the devices which direct the compressed gas stream towards the material bank, the thickness of the coating being regulated immediately in front of this material bank in order to maintain a fixed thickness of the gas flow.

2. Satt att reglera tjockleken pa en belaggning av ej hardat plastskum enligt patentanspraket 1, kannetecknat darav, att det omf attar ett arbetsmoment, som bestar i att pa nara hall hlasa komprimerad lnft mot en bank av Overskott pa plastskum, varigenom tjockleken pa belaggningen omedelbart framfor banken likformigt Mlles vid bestamd tjocklek.2. The method of regulating the thickness of a coating of uncured plastic foam according to claim 1, characterized in that it comprises a working step which consists in loading compressed air against a bank of surplus plastic foam in a nearby hall, whereby the thickness of the coating immediately in front of the bank uniformly Mlles at a fixed thickness.

3. Apparat for belaggning av en lopande materialbana med plastskum ,enligt patent anspraket 1 eller 2, kannetecknad darav, att den bestar av: hjalpmedel for frammatning av en materialbana; en pfiforingsanordning for att phfora ej hardat plastskum ph den frammatade materialbanan; en pneumatisk regleringsanordning for att hâlia jamn tjocklek ph belaggningen av ej hardat plastskum pa den frammatade materialbanan genom att rikta en strom av komprimerad luft mot en bank ay overskott pa plastskum; och anordningar for att utfora den hardning, som skall omvandla det ej hardade plastskommet till en hardad skumplast.Apparatus for coating a running web of material with plastic foam, according to claim 1 or 2, characterized in that it consists of: aids for feeding a web of material; a feeding device for feeding uncured plastic foam onto the fed web of material; a pneumatic control device for maintaining an even thickness of the coating of uncured plastic foam on the material web of feed by directing a stream of compressed air towards a bank of excess plastic foam; and means for performing the curing which is to convert the uncured plastic scoop into a cured foam.

4. Apparat enligt patentansprhket 3, kannetecknad &dray, att den Or forsedd med en pneumatisk anordning, som riktar en strom ay komprimerad gas mot en bank av everskott ph belaggningsmedlet, varigenom belaggningen p0 materialbanan Mlles vid bestamd tjocklek. AnfOrda publikationer:4. Apparatus according to claim 3, characterized in that it is provided with a pneumatic device which directs a stream of compressed gas towards a bank of excess of the coating agent, whereby the coating on the web of material is measured at a certain thickness. Request publications: