DE2105966B2 - PROCESS FOR MANUFACTURING OPEN OR CLOSED PACKAGING FROM FOAM, PREFERABLY FOAM POLYSTYRENE - Google Patents

Description

The material you want, extruded

45 expanded polystyrene, is already on the market. The problem, however, is that so far

The invention relates to a method of manufacturing packaging that has not been possible lung νυη open or closed packaging to produce plastic styrene at a reasonable cost rigid foam, preferably foam poly- len. Many attempts have been made and they have been tried and tested. 50 substantial costs are in projects to create

In the packaging industry, one useful packaging has long been expanded polystyrene The usual packing mate- rol has been expended after being found materials such as cardboard, paper, sheet metal and glass had to be art- that the material in question was not only used in different types of substances to pass over. It can be cheap to manufacture, but also good for you it can be determined that SKH die Kunststoffe is the most efficient and has excellent insulating properties, best as a substitute for paper packaging, as it is of great advantage, e.g. B. in the packaging of Plastic films are now at competitively priced frozen goods. One has to further determine sen produced and in a simple way by that the material can also be in multicolor technique Welding can be sealed as well as one that is easy to print on. That you don't have packaging have superior strength. In the case of semi-rigid packaging made from this excellent material gen, like milk packaging, one has to a grain can, is due to the fact that usual promissed, and indeed a combination of plastic welding processes are not applicable in Cardboard or paper with a plastic coating. primarily because of the insulating properties of the mate-die Solution has certain advantages but is in the rials. If thus two to be connected to each other Quite expensive to manufacture. Rigid plastic packaging 65 pieces of foam polystyrene between two heating jaws The jaws are mainly only used for packaging purposes, the jaws only call grooves in used by more expensive consumables as the sides of the pieces resting against the cheeks Packaging costs are high. A certain Ko- emerges, while the adjacent sides

of the two pieces do not adhere to one another at all or to an extremely low degree. The rest of the known Process for joining plastic surfaces, e.g. using ultrasound and Hot air, have also proven to be inapplicable for the reason given above.

The invention is therefore based on the object of a method for producing packaging of various types from rigid foam, in particular from expanded polystyrene. To the Solution to this problem is proposed according to the invention that joint surfaces to be connected to one another heated over its entire extent to the melting point of the material by means of heating elements that are worked directly onto the joint surfaces. that heating is continued until the layer of molten material has a predetermined one Thickness has been obtained that the heating elements are removed and that the joint surfaces immediately afterwards collapsed and subjected to compressive pressure, the plastic being a has such rigidity that it withstands this pressure without deformation in unheated areas.

In the drawing are devices for implementation of the method according to the invention and described below with the process management. Show it

F i g. 1 to 3 show the production in a schematic plan view of a packaging jacket part,

F i g. 4 to 6 in vertical section the placement of the The bottom and the lid on the shell part,

F i g. 7 a modification of part of the in FIG. 5 Shown and

F i g. 8 shows a section along the line VIII-VHI in FIG. 7.

The in F i g. 1 to 3 and 4 to 6 devices shown represent the parts of a larger machine for Practicing the method according to the invention for the production of packaging from expanded polystyrene The other devices for feeding and removing blanks or packaging, Controls etc. are not illustrated for the sake of clarity as they may be of the usual type. In the drawings is the manufacture of a right-angled parallelepiped with casing piece, bottom and cover shown. Of course, the production of packaging is any desired Shape possible.

In Fig. 1 with 10 denotes an inner molded part around which a blank 11 made of expanded polystyrene intended for the production of the jacket piece of a packaging is to be molded and welded to form a ring. The inner molded part 10 is rectangular in horizontal section, with the exception that its one corner is cut off for the reasons explained in more detail below. The blank 11 made of expanded polystyrene is bent and attached with the flanges formed by the bending opposite two sides of the mold 10 which are perpendicular to one another. The inner mold 10 is then moved in the direction indicated by an arrow 12, so that the side of the blank facing away from the inner mold part 10 rests against the inside of an angular member 13. At each free end of the flanges of the angular member 13 a folding flap 14 or 15 is provided, which can be actuated by a cylinder and piston unit 16 a or 16 b. After the inner molded part 10 has been moved against the angular member 13, a cylinder and piston unit 18 is actuated, with a heating element 19 attached to the piston rod of the unit 18 being moved towards the inner mold 10. The movement of the link 19 is continued until its front end is at a small distance from the inner molding 10 and its beveled corner surface, as in FIG. 2 is shown. Then the cylinder and piston units 16 a and 16 b are actuated, whereby the folding flaps 14, 15 connected to them are pivoted by approximately 90 °, as shown in FIG. 2 is illustrated, the free ends of the blank placed around the inner mold 10 being brought into contact with the heating element 19 made of Teflon-coated metal, as shown in FIG. The forward end of the heater member 19 tapers forward to allow the member to be easily withdrawn, which occurs when the plastic has melted to such an extent. that a layer of predetermined thickness is formed from the molten material, at which moment the heating member 19 by the action of the cylinder and piston assembly 18 in the in Fig. 1 is withdrawn. At the same time two are connected to the cylinder and piston units! Ti 6 and 16 b connected to the cylinder and piston units 17 or 17 b made to the g i in F. 2 not yet to move the sides of the blank against the inner shape 10 against the inner shape. At the same time, the whole unit, which consists of the inner mold, the folding flaps and the cylinder and piston units, is pivoted counterclockwise so that an angular pressure member 20, which can be moved back and forth by means of a cylinder and piston unit 21, is opposite the just merged faces is located. The member 20 is pressed into firm contact against the corner of the blank facing it and is held against this corner in contact until the joint surfaces adhere securely to one another. The inner molded part Iß is then displaced by the angular member in a direction opposite to the arrow 12 and the now annular blank 11 is removed from the mold after the inner mold 10 has been pulled out.

The ring-shaped one removed from the inner mold 10 Blank 11 is then, in order to be provided with a bottom, in the manner shown in FIG. 4 shown device attached, in which the blank 1 »from a mold bottom that can be moved up and down 22 is worn, while the lateral surface of the blank is supported by molded side pieces 23 will. Above the blank 11 a holding plate 24 is provided. B. by vacuum effect a Can hold the base plate 25 made of expanded polystyrene just above the blank 11. The plate 24 is displaceable in the vertical direction by means of rods 26, as illustrated by the double arrow 27 is. In addition to the shape formed from the parts 22, 23 and 24, heating elements 28 are provided, which according to FIG the double arrow 29 by cylinder and piston units, not shown, in the same way as the heating element 19 in FIG. 1 to 3 can be moved back and forth. For the sake of clarity, there are two such heating members 28 are shown, however, two similar members are arranged around the one parallel to that of FIG Sides in the drawing plane in FIG. 4 to 6 to be heated. The heating members 28 have a width that with the length of the side walls of the blank 11

2 1Θ5966

so that each limb heats up the whole of the cunium assigned to it. From one shown in FIG. 6, the heating elements are shown in the outer position shown in FIG. 4 shifted position in which the front ends of the four heating elements.-28, thus in the corners meet and form a Trichleri'onn After the HejzgheJi-r.28 Jiev / Luge eiugcuoiunu η hab. wild the BoJcuplaiie 12 uaeh above and gleiui zeüiu move the H.uieplaitc.24 to uuicn; obcun Iv jaw υ do Zaivluiii.es U m plant LIUllicJi de ι tlcizglicdi: .28 gebiaeii: at the same time as uiv Kuuienbeieielii the Liuei.seiU Bodcjjplatic 2S in Aiuagw against the Ubciseiu member «. ·; biaeh; become, fi ι \ ί from I. &. 4 tu.s u c; hiehiw! . dur Jit 1 icizglied · .. ^ uC tvauicnlidcJic unu zui Lutci & tiic uii Oouuipiatic sduaggesielli wni! ui'u those flatter ,, Ji. come into contact with the Huzgiicdcin J8. * eidcii thus οαιη ^ Uund — i 'ab ^ c & chiagi, \ sodun.li a grojjcic attachmentUac'ic z \ s> shy your BoJlη 25 and the «Lusüiniu 11 formed win !. The cutting II and the BoJcu 25 graze waJuciiij eiuer nneichend lye Zcu with Jen Hei. divide into Berulnuii; Gehaller, uaiiii mc! i eiin Schiclu gcschinoUeuen MaieuaL from voiaUiU \ sliiiiii ter Dicie forms, and were Jauacli at the same time uui lein., Mouath the floor 25 and the cut 11 ix> ijii »iijcugeiuhr; \ serdeii. "'Dal' you. GEM (iiuouenen SciiiclUeu mtleiuander come in Beruiuung clock DMCK is iiutteLs of l'iatie 24 aiii the BoJeiiplatie 25 au-geulu and de ^r Cutting Jl ι * α huireiciienJ star. Order against you. From Ualleplaue ^ 4 auogeubic Dmckwu kunc selb--: a WiJetlagc; to form. Oberhall) <l «-t HaiieplatU ' JA is: cmc l'rel> and i-uiuiung ^ vunicii doü.30 angvordm. which, when folded, di - zu ^ duuiUs J1 uuu of the floor 25 downwards over you formed i ugc ν ei.schiebbar i ^. uiii dit »c to round off and given Reüi of the molten Mau riai-. those from the lie heiausgedruugeu and, zu «niiemcu. Mic this in F. c 0 visualization is;

ii. du besciiuebeuen way weuein lioggelornr .. gives way: afterwards im · / \ uweaduug ah such! either from Uli \ oiiiehuwu enticmi or in tigejuieiner Übl. chci 'V \ cii- iiciuaigeJrelr uad Uduat !: .B on; : <- gendeincr liquid, can be filled directly. A Lid is then attached to the open volume in the dyke manner as noted under 1 i g. 4 to 6 has been described. after which the Ver pack can be removed from the device

In 7 i "7 and R there is a modification of the Heizeiu Jl-S 28 shown, which in practice appear as autler ^ i \ τ> · teiuiah has shown that there are many surfaces of the Heiglieui, which are in contact with the

ίο biatnt werücu. sinu alternating ribs 31 and Ui ·. th 32 is provided, which zigzag is formed. , s lsi ersichtiicii. that the ribs are flatly shaped over the reeds of the enipcnenpt seutv.i Hai'he located; If these areas rti. 7u verbin "ienueii Fiacncn erhitTen will: · irleichrciti euispiecheno- · ribs and reeds in the Funenfi, Eheu spender, woüurcn this still verpröBcrf wc · the üadurcn and the FestiEkeit the Fupr erhohei, Jn uti manner described above are thus the

Ao most times packaging is made out of foam potvstvrol ho put Dm tmind this * Ertolpes is then πι -sehe. dal. die bigenscna; .. di · man earlier ak a nniihcwindiicru ··. Obstacle door on ejntachi Vettimdur.L fully looked at two questionnaires, and Twar du- Isohcrf

as lugkeii des Matcnais. eeinäi. ite; Frfmdiint; ausrr nut / i wuJ. um one cesdmtalzcne schirhr «.i'lanc · n this. State that one 7λι · ha, d Fugenilucnei zuannnenaileeen and 7um "iichen-Aiiemanderhahei: zunneen Of course mul rtc bchuiunstoii a certain rigidity atifwei-sei. dam he penup via an inaugural procedure;

Di- herjKsteÜK Verpaclraiij; hraurh: «lh« nv · not every hour; di; Form anev rrchrwmklipen Pn alleiepipeds to have but can be cylindrical, sph:

rise11 ιβλχ SCUi Sn can also very well be the Fnm. a bottle, ts should also be emphasized with the emtecheri Poivstvroi7iischnitt described instead of deober SM after the

e erf

MaJjen Vcrfamxn can be treated o tubes after Vcrpackunpen. beiteherKi from an Aultensclnclit ans & chanmrJo! vst \ Tnl and a dnm. together? Endei: ctwa ^ softer inner shoe; from Jenamnpolvathvlcii

Claims (4)

A reduction in patent rights can, however, be achieved by the fact that packaging of this type, usually from 1. Process for the production of open or bottle type, often made at the filling site, e.g. B. extrusion closed Packaging can be made from rigid. For cheaper consumables and ins-foam, preferably expanded polystyrene, 5 especially for solid or non-liquid materials marked that with one another packaging of the latter type cannot compete with joint surfaces to be connected to one another via their glass, sheet metal and cardboard. whole expansion at the same time to the melting point Another clearly noticeable endeavor in the of the material are heated by means of heating elements, the packaging industry is currently, the packaging is on which act directly on the joint surfaces to produce the io fill location, as it is at considerable cost Heating is continued until the layer is bonded, unfilled packaging of the fire melt Materials to carry a predetermined see or can type compared to that Thickness has obtained that the heating members are remote in weight for their volume. at and that the joint surfaces immediately afterwards packaging made of paper and cardboard this was never a collapsed and a problem of compression, since they are almost invariably in flat areas pressure are released, the plastic convey state and slightly straighten up at the filling point exhibits such rigidity that he does not admit of. Packaging made of heated plastic coated Make this pressure without deformation. Paper and cardboard are usually withstood at the filling, place with the source material in the form of a with 2. The method according to claim 1, thereby producing 20 plastic-coated paper web. Would this indicates that at the same time or immediately not the case, packaging would hardly be dieable after pressing the joint filler type on the market. Certain shapes Place a molding element against the joint over the plastic-coated paren whole length is pressed to pierce the joint or cardboard is used as packaging from single-form and treated any remains of paper or cardboard from the joint, d. H. they are in extruded molten material is conveyed to a deflate state and at the point of use distant. erect. The relatively rigid plastic 3. Method according to Ans; -uch 1 or 2, which means that, as already mentioned, packaging is often carried out on characterized in that the heating element or the heating filling location is made. members to the plane of the jigen joint surfaces 30 From the above it can be seen that there is a need for are inclined, which is heated by the heating elements a cheap, relatively rigid plastic should be so at the same time with the acquisition of which packaging at a price the joint surfaces can be chamfered in such a way that the price of a corresponding, that they are enlarged, comparable to the cardboard box. Another 4. The method according to one of the preceding 35 wish here is that the material in Bo claims, characterized in that the joint or roll form can be shipped, and that opposite surfaces with the help of the heating elements with different types of packaging and also hermeselling Ribs and grooves are provided, literally closed packaging at the filling location where the ribs can be made in one joint surface. counterpart in the grooves of this one joint 40 Such packaging could then with the The other joint surface to be connected has most of the packaging available on the market. genes from different materials successfully con curse.