DE1761734C3 - Device for erecting and gluing the box corners of a blank provided with a thermoplastic coating on both sides - Google Patents

Description

Fcenklnppeii 20 are glued to the; ιιιί the luidwäiiden 14, | 5 scalloped surfaces 21 in order to convert the blank A in the folded state into a folding box, as shown in FIG. 4 is shown to be hall.

The cardboard from which the blank 4 ausgesehnit- ϊ fen can be on the order of O.J up to 0.5 mm, and this cardboard comes with a coated relatively thin layer of a thermoplastic material, such as polyethylene or from a high-end wax. These Layer has good properties for sealing against moisture and steam. So far, however assumed that such layers are too thin to even allow a satisfactory heat bond. However, it has surprisingly been found that such thin layers are completely sufficient are for heat bonding.

The device / for erecting the blank A to form a screen has a stamp in a generally customary arrangement. a folding shaft through which the stamp presses the blank and places it. which are arranged on the folding shaft. A sponsor is also provided. Jer the Zu-!, Cliuiiie / wipe the pre-folding elements at the shaft-L'iii! - '. UiL' deposits. When laying down, certain accessories are folded. The supplier promotes cmc '! Cut after the other from a stock pile for cut-outs / around the folding shaft.

Reference is now made to f "1 g. 2. The blank Λ is / are arranged between four hollow protrusions and ilev blocks 22, 2, 24 and 25. These front and back blocks are at the corners of an in essential right-angled Fakschachtes Ib . D; -i I HiLMhLZ ties F-'altschachtes is by curved l'i.ute ;: 27. 24 and 30 (f- i g. J) limit / J. on their nbe rn hon / oiM.iien sections of the cut are stored.

Threaded or corrugated ( ¹ In Men 31 and 32. Tue are arranged on opposite V-Uen of the I old ·· ..- hatch (Fig. 3), capture the Karlen of the blank and act as brackets.: Im keep the cut in the generally hon /<■11t.il.:n I ..ige / u, in ύ <ζτ this cut in I 1 g. 2 daru'es: ellt is. ur'.il / was from at the moment .in. 111 the; Erl.'li ;. around <i: -en you through the folding shaft / !; cinnk !!.

/ u; ¹ ! F.rhit / s of the incident and llei / bloike 22. 23 24. 25 are these fed with heated Dnieklul ¹ ;, γ? the low temperature being above the scorching or charring temperature of the cardboard. Ms liei play be a '! empera! urberek h von ti «) his / u ¹ VlO (gen, mm This air is the incident and lleizhiok ken 22 and 2? 'i about a I l.i'iptleming! I / ugühr.'. on - ^ de : from silIi Ab / wc'igiingsleitii'igen 32 and iicrsiiek ken Fin .ihiilK h '.' i "I eiiiingsanst hlul 'isi hir die \ ¹ OrI aiie Ί" .ί ll ..- i />.! O'. -ke 24, 25 (1 ι g. 3) \ ovgeseiien.

In the air, V ₁ , η <ieu incidents and all kinds of blocks are released. Fine number 6. ·, this l.uitdiiscn 34 is against the corner valves 20 iniil in the vv -.seils Iu hen perpendicular / u these valves gcrii Iu. 'The distance of the l.ult from its exit to / u deu klappen is very!; Iirv. In addition, there are still a number of l.iifid.iseii J5 of ile blocks 22, 23, 24, 2'i from f, -S (sloping against the curses 21 on which later form the F.ndw, inde! 4. 15 Subdivisions directed and this I.ui 1 let '!'. Iiiiv-partly the double, before / iisis reject the multiple Wejliinge of the l.ufi from the other lulidüseii 34.

The heated compressed air expands after r.ie. ilen nozzles has leaked out and cools down accordingly, and the surfaces 21 are therefore in one Heated to a considerably lesser extent than the corner flaps 20.

Measurements show that, for example, the air temperature at the impact point on the Eckcnklappen is 510 "C for a certain .Schachtelgröße, whereas at the surfaces 21, the temperature 2b0 ^J C.

The surface of the blank, which during the subsequent Raising it against the surface of the stamp is thus at a lower temperature than the one directly opposite the air nozzles Surface of the blank on the corner flaps 20. This increases the risk of the coating material adhered to the stamp, reduced to a minimum / i. The surface on the corner flaps 20 becomes extremely hot as a result of the cementing by means of Her I .ufi received enough to cover the coating / u soften. This Frrr.i.ung takes place, however only for a very short period of time. so that the back of the Fckenklappe 20, which is to Sienpel indicates a much lower Temperature is left.

When the blank is cut into the 1 g. 2 position shown is stored. The hot compressed air from Jen I.utt nozzles> 4. mil: the Fekenklappen aiii • prevents incidents and llei / blocks, i.rd this also eliminates the need for periodic cleaning. As a result of the impact of the air, which, ms the l.iifldusen ¹ A against the left flaps 20, ms mi;, these corner flaps assume a position. which lies somewhat beyond ι \ ·: ν perpendicular position, like c- in I i g. 2 is shown. The corner flaps 20, however, move back into a substantially vertical position, to whom; the punch begins to move the blank into the folding shaft / π and the corner flaps 20 are outside of the ready.lies of the Fiiitdusen 34 are.

Let Ls again be 1 ig. I l'e / ug taken, l.ufi with a pressure of about 0.1 mi is supplied to electrical Fr-S) ¹ VlTH Jb, and / was via flexible lines. '... with one shown at 37. This .. · Air comes from a compressor, not shown, and is supplied to each heater in an amount of about 0.1 m 'min. From this it follows that a quantity of efv; i Q.Otf ¹ "m '' min '. ¹¹ Ii heated air from each of the inlet and heating blocks 22, 23, 24 and 25 through the / iiL ^r chi '- igen Luitdüsen delivered w id.

Ieuer I rhit / i .: Hi L'ibi eihu / te Luft d'ii \ h the main ieitun ;. ' 31 .ib. ,; n ie em T-Liituig ¹ K is mounted ki'iunnier 3't '-rmo ::! ¹ ·. Ivu a connection / wischen the TI il'e ^ JX .ml,! Ei, I '!,! ,,', Vi'un-e ¹ '32. U.

V. et_i; i.; .-; ivl.u ,. ι.Ί-οιΊ .. · ϋ.,. rw ended l.uftmenge it is possible that l.eiiungs.iriordnung 31 38. 39.32, 33 mi 'leiesknpariig /iis.inimeiigefügten co - ,, - |! u hurry up ^/! ·.: '] -. η. and ixi richi is required. Establish LiM connections. (Ii the Lullverliisl due to lack of Abdii. Hiuiig very little lsi. The telescope-like seat of the l.eiungen enables multiple repositioning of the incidents and I lei / block. If the (irölte of the boxes that graze is changed. The exact F. inslellunL 'is the incident and llei / blocks 22-25

one much less critical than one before UhItHi) J. in the / iischniüeile by imniitelbare Heated to the touch.

In I i g. i is the punch 40 is shown above the l'alisch.ichtes, and immediately to the right \ <> m Sicmpcl when ilet check a suction head 41. uiiil it is a rallliiieal 42 in the visible l.ckenklappen These components are parts of a conventional back and · moveable / iischniitlorde rice.

The suction head 41 uiul d.is l.ine.tl 42 des / uschnilifni cU.rers move see / swipe a not shown /.uschnilinuigii/in and the Iiltschacht back and forth This section magazines lies above the top of the depicted. On /.iisehmttmaga/in a / u cut anigeniiinnien, and this cut is under Prolapses of the flaps 20 / important folds-11 nc I I lei / blnckcn 22 to 2 * ΐ filed by the orderer.

If after withdrawing the IOrderer the punch 40 moves down, so get the \ <> rgefiilii'ien left flaps in contact with the stenipeles. being ilie sticky ropes muh stamp point away, and the vorerhit / leii I will laugh 2f pressed against the Ixkenklappen 20 when the punch goes through ilen l'altschacht.

For this purpose 2 sheets of drawings

Claims (1)

Claim: Device for erecting and gluing the Schaehteleeken one on both sides with a thermoplastic Coating provided blank, its corner flap hinged to a side wall can be applied and glued to the adjacent end wall, only one folding die, one pressing the blank into the die and pressing the corner flaps against the end panels Punches and with pre-trap and heating blocks arranged at the die corners at the die entrance, between which a blank conveyor inserts the blank in such a way that the later the side wound forming parts of the blank hinged corner flaps from the pre-folding and heating blocks are pre-folded, while those located between the pre-folding and heating blocks, later the End wall-forming blanks remain substantially flat, and with those folded upright Eel. ·, ·. Flaps from those adjacent to them Sides of the incident · Lind heating blocks are made of heated, characterized in that the Prefold and heating blocks (22, 23, 24, 25) each with a hot air inflow (32) and on their to the The side surfaces facing the heating areas of the blank are provided with air nozzles (i4. 35), one of which (34) unfolded substantially perpendicularly against that of the pre-trap and heater blocks Corner flaps (20) and the others (35) at right angles to these air nozzles (34) Planes diagonally downwards against the points (21) of the Cut, which focus on the between, the incident and lleiz.biörkei (22. 23: 24. 25) lying and later cut-to-size parts forming the find walls are located The invention relates to an erecting device and gluing the .Schachtelecken a bilateral lig provided with a thermoplastic coating Blank whose corner tabs, which are hinged to a side wall, are each attached to the end wall adjacent to it can be folded and glued on, with a folding die, a stamp that prints the blank into the die and presses the corner flaps against the end building and with prefold and heater blocks located at the die corners at the die entrance, between which a blank conveyor inserts the blank in such a way that the parts of the later forming the side walls Blank hinged corner flaps are pre-folded from the incident and I lcizblocks while the Located between the incident and lead blocks. Later, the cut-to-size parts forming the end walls Remain flat and keep them upright folded corner flaps from the sides of the incident and hci / bloöckc jiii.s adjacent to them will. Such a device is known from US Pat. No. 3,192,837. In addition to the corners at the die entrance, it has stationary prefolding and heating blocks and heating blocks arranged on the oscillating frame of the Eörclerer. The stationary heating blocks heat the adhesive points on the corner flaps and the non-stationary heating blocks heat the surfaces on the parts that will later form the end buildings, to which the corner flaps are to be glued. In both grooves, heating takes place by touching the areas to be heated with the heating blocks. This heated: by direct contact has the disadvantage dal a portion of the thermoplastic layer on the SURFACE before the Vorfalte- and heater blocks is transmitted, then u wel chj time must be cleaned from time /. Another disadvantage here is the loss of the adhesive transferred to the heating blocks. The heating blocks, which are not stationary, increase the mass of the conveyor, whereby the Arbeitsgeschwindig speed is reduced. Since regular sets of prefolding and heating blocks are used, simultaneous heating cannot always be ensured and, disadvantageously, separate controls are required for the two sets of prefolding and heating blocks. From the German Aunlegeschrift 1 270 47b it is be kanni. when covered with thermoplastic semen Packaging parts of this Verpakkii.ig, which are folded as tips, the mil these are to be glued, heat / u by blowing warm air into the fold. so that the two surfaces adhering to one another are heated at the same time. Special problems arise in all of them. in which the thermoplastic layer on the blank is very thin and in which a Klebsioffvei lust not can be admitted. The search is based on the task, a device animal type described at the beginning / li create, with which it is possible. Process blanks with thin thermoplastic layers at high work rates. According to the invention this object is achieved by that the prefold and lice blocks each with an influx of air and on their side surfaces facing the points of the blank to be heated with air diffusers are provided, some of which are essentially 4.0 perpendicular to those of the V01 fold and lleizblökken unfolded corner flap and the other planes located at right angles to these air nozzles directed obliquely downwards towards the parts of the cut which are located on the intermediate and • 15 lead blocks and later form the end walls Cut parts are located. The invention will be explained with reference to the figures in the drawing. It shows F i g. I a representation of a box blank, 5c which can be erected to a box shape, the corners of which are connected to one another by means of heat. F i g. 2 shows a perspective view of details of the device, F i g. J is a perspective view of a part the machine, which has a chute, a stamp and Has prefold and heating blocks, the view is such. that one on the upper ropes of the folding shaft looks, and 6n f 1 11. 4 an illustration of the folding box produced. The in F 1 g. 1, the blank A shown has parts for a bottom wall 11, for front and rear Scilenwändc 12, 13 and for end walls 14, 15 with dust flaps ₅ pen 16, 17. A cover 18 is hinged to the rear side wall 13 and has a closure flap 19. Corner flaps 20 are hinged to the ends of the front and rear side walls 12, 13. This Ek-