SE179896C1

SE179896C1 -

Info

Publication number: SE179896C1
Authority: SE
Publication date: 1962-01-01

Description

Uppfinnare: S G Thulin Vid tillverkning av pasar av plastmaterial forfares sa, att ern materialet foreligger i folieform, det forst vikes och forses med en i langdriktningen forlopande svets, sa att en slang bildas, villten sedan hopsyetsas pa tvaren och avskares. Ayskarningen kan ske direkt med tillhjälp av svetsningsorganet, vilket kan vara utformat f6r glodsyetsning, varvid en botten hopsvetsas samtidigt som en viss del av slangen avskares. Man kan aven forfara sa, att slangen forses med ett antal tvarsvetsar, varefter en kniv skar av slangen strax intill syetsen, sa att ett antal pasar erhalles. Nãr det galler plastmaterial, som genom sprutning overfores till slangform, behover givetvis den forsta operationen icke foretagas, utan slang-en forses endast med tyfirsyetsar och uppdelas i pasar. I samtliga fall tillverkas alltsa varje pase for sig, och de erhallna pasarna staplas darefter i lampligt antal och paketeras. Inventor: S G Thulin When making passes from plastic material, the material is made in foil form, it is first folded and provided with a longitudinal weld, so that a hose is formed, the game is then sewn together on the product and cut off. The ice cutting can take place directly with the aid of the welding means, which can be designed for glow welding, whereby a bottom is welded together at the same time as a certain part of the hose is cut off. It can also be said that the hose is provided with a number of transverse welds, after which a knife cuts off the hose right next to the seam, so that a number of fits are obtained. When it comes to plastic material which is transferred to hose form by spraying, of course the first operation does not have to be carried out, but the hose is only provided with tyfirsyetsar and divided into passes. In all cases, each pass is manufactured separately, and the obtained passes are then stacked in appropriate numbers and packaged.

Bet fir fiven kfint att framstalla pasar genom samtidig kantsvetsning av en stapel av pasamnen, varvid varje amne skiljes film de omedelbart intilliggande med en varmestabil mellanlaggsskiva. Dessa mellanlaggsskivor maste naturligtvis avlagsnas efter svetsningen, vilket medfor betydande kostnader och arbete. Bet f fiven kfint to produce passes by simultaneous edge welding of a stack of pass blanks, whereby each blank is separated film the adjacent ones with a heat-stable interlayer. These interlayer boards must, of course, be removed after welding, which entails significant costs and labor.

FOreliggande uppfinning avser ett forfarande fOr framstallning av pasar eller liknande av plastmaterial genom hop svetsning i varme, varvid en stapel av pa varandra placerade svetsbara slangar eller arkpar avskaras till onskad langd och hop svetsas vid avskarningsstallet, genom vilket de ovan namnda olagenheterna undvikas. The present invention relates to a method of making passes or the like of plastic material by heat welding together, in which a stack of superimposed weldable hoses or sheets is cut to the desired length and welded together at the cutting stall, thereby avoiding the above-mentioned imperfections.

Det for forfarandet enligt uppfinningen utmarkande är, att varannan slang eller vartannat arkpar bestir av olika material, som aro daligt svetsbara mot varandra, sa att slangarna resp. varje arkpar forhindras att sammansmalta med intilliggande slang resp. arkpar och endast latt sammanhanga med varandra under bildning av en bunt. The distinguishing feature of the method according to the invention is that every other hose or every other pair of sheets consists of different materials which are directly weldable to each other, so that the hoses resp. each sheet pair is prevented from merging with adjacent hose resp. sheet pairs and only slightly connected to each other to form a bundle.

Man kan darvid ga. tillyaga pa sa.dant salt, att plastslangar av tva skilda kvaliteter, t. ex. polyeten och polypropen, som Oro daligt svetsbara mot varandra, lagda pa varandra upprullas pa en trumma till ett onskat antal vary. Den ad bildade bandrullen avskares och utlagges pa ett transportband. Den harvid erhallna stapeln, som bestar av ett antal slangar, av vilka varannan utgores ay polyeten och varannan ay polypropen, avskfires nu medelst en glodtrad eller glOdkniv, varvid de mot varandra lagda polyetenskikten resp. polypropenskikten hopsveisas och bilda botten i pasar, under det att de sa bildade pasarna endast Hit sammanhanga med varandra. Man kan darvid ga. add on such salt, that plastic hoses of two different qualities, e.g. polyethylene and polypropylene, which are easily welded to each other, laid on top of each other are wound on a drum to a desired number of varieties. The belt roll formed is cut off and laid out on a conveyor belt. The resulting stack, which consists of a number of hoses, each of which is made of polyethylene and every other of polypropylene, is now cut off by means of a glow-threaded or glow-edged knife, the polyethylene layers laid against each other resp. the polypropylene layers are welded together and form the bottom of the passes, while the said passes formed only Hit connected with each other.

Man kan aven forfara sa, att bandstapeln avskares med en kniv, t. ex. en giljotin, och att de da blottade snittytorna hopsmaltas antingen genom att ett varmt foremal, som ldmpligen är bekldtt med tetrafluoreten, pressas mot snittytorna eller all dessa upphettas genom vfirmestralning. Snittytan kan aven utsattas for inverkan ay en het gasstrom, t. ex. upphettad luft, som biases daremot. Med delta forfarande skiljes alltsa bandstapeln med en kniv och smaltes sedan ihop. I stallet for upphettad luft kan man anyanda en het vatska, som sprutas pa snittytan. Hopsmaltningen kan iiven ske genom neddoppning i vatskan. It can also be said that the tape stack is cut off with a knife, e.g. a guillotine, and that the then exposed cut surfaces are melted together either by pressing a hot mold, which is usually coated with tetrafluoroethylene, against the cut surfaces or all of these are heated by heat radiation. The cut surface can also be exposed to the influence of a hot gas stream, e.g. heated air, which is biased on the other hand. With delta procedure, the strip stack is separated with a knife and then melted together. Instead of heated air, you can use a hot liquid, which is sprayed on the cut surface. The aggregation can take place by immersion in the liquid.

Vid anyandning av foliematerial I stallet for slang hoprullas ett arkpar av exempelvis polyeten med ett arkpar ay exempelvis polypropen. Vid kanthopsmaltningen intraffar da, att polyetenarken sammansmalta och bilda pasar och polypropenarken. Ora detsamma. I detta fall maste givetvis aven arkparens langsgaende sidokanter hopsvetsas. When using foil material Instead of a hose, a pair of sheets of, for example, polyethylene is rolled up with a pair of sheets of, for example, polypropylene. During edge hop melting, it then occurs that the polyethylene sheets fuse together to form fits and the polypropylene sheets. Ora the same. In this case, of course, the longitudinal side edges of the sheet pair must also be welded together.

Exempel pO. andra plastmaterial aro polyeten och polyvinylklorid och vidare kunna namnas laminat, t. ex. papper belagt med po- 2— — lyeten, film av regenererad cellulosa belagd med polyeten eller polypropen. Darvid anbringas tvi laminatbanor med plastsidorna mot varandra 1 en stapel pa ovan angivet salt, t. ex. polyetenbelagt papper med polyetensidorna mot varandra, vilka sedan hopsvetsas, under det att papperssidorna förbli fria frail varandra. Genom anvandning av laminat kan salunda en enhetlig produkt erhallas. Example pO. other plastic materials aro polyethylene and polyvinyl chloride and further may be called laminates, e.g. paper coated with polyethylene, regenerated cellulose film coated with polyethylene or polypropylene. In this case, two laminate webs are applied with the plastic sides facing each other in a stack of the above-mentioned salt, e.g. polyethylene coated paper with the polyethylene sides facing each other, which are then welded together, while the paper sides remain free from each other. By using laminate, a uniform product can thus be obtained.

Givetvis kan man aven omvAxlande anvinda slangmaterial oeh arkformigt material. Of course, you can also alternately use hose material and sheet material.

Foreliggande uppfinning mojliggor tillverkning av ett stort antal pasar utan anvandande av pasmaskiner, varfor produktionen blir mycket hog i forhallande till den anvanda arbetskraften. The present invention enables the manufacture of a large number of passes without the use of pass machines, so that production becomes very high in relation to the labor used.

Claims

A patent claim: A method of making bags or the like of plastic material by heat welding together, wherein a stack of superimposed weldable hoses or sheets is cut to the desired length and welded together at the cutting stand, characterized in that every other hose or sheet consists of different materials, which are easily weldable to each other, so the hoses resp. habit sheet pairs are prevented from merging with adjacent hose resp. pairs of sheets and only slightly connected to each other to form a bundle. Request publications: Patentskrifter! Ran Sverige 134272, 135478, 157339; Great Britain 691 592, 716 321. Other publications: Kleiner, L, Perstorpsboken, Sthlm 1950, pp. 220-221. Stockholm 1962. Hung. Boktr. P. A. Norstedt & Sillier. 620089