DE2352278A1 - DEVICE FOR SHRINVING GUARDS IN PLASTIC FILM - Google Patents

Description

Applicant's Ährendt -ι- Birkendahl oHS, 4o3 Morichengladbaeh-Hehn Hehn 113 b "

Annex to the entry of 15 October 1973
Pat / 286 Uh-Hx.

Device for shrinking goods in plastic film «

The invention relates to a "device for shrinking goods, in particular goods on pallets, in plastic film under the action of heat _& The application is an additional application to the earlier German patent application P 21 53 00I.8. The subject of this earlier application is a method and a device for shrinking of stacked on pallets goods in plastic film with the aid of a heating column, in which a plurality of a burner pot for mixing and igniting fuel gas and air supply _s .One ignition device and a flame tube standing individual shrink aggregates gas-heated single "Schrumfpaggregate are combined. by combining to a heating column that corresponds approximately to the maximum _{stack height in question 9} , a previously unattainable heating density has been achieved over the entire height cfe of the stacked material to be shrunk and thus a shrinkage performance that is only a fraction of the time previously required Requires shrinking devices extending over the height.

The object of this additional invention is the device of the parent patent application to further improve and optimize, both with regard to the applicability for the most diverse as well irregularly stacked goods as well as in terms of shrinkage performance.

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According to the invention, this object is achieved by a device for shrinking goods, in particular goods on pallets, in plastic film under the action of heat, in which, according to patent application P 21 53 00I.8, several from a burner pot for mixing and igniting heating gas and supply air » an ignition device and a flame tube existing individual shrinking units are combined into a heating column, solved in that the individual shrinking units are arranged inclined with respect to the vertical axis of the heating column. Preferably, the single-shrink units to the vertical axis of the heating column form an angle of 60 - Io Grade

Surprisingly, the individual shrinking units are reduced by 20 to 40 degrees, preferably by 50 degrees forward an optimal utilization of the heating capacity of the individual shrinking units is achieved. This is probably due to that through the rising of the hot evaporation gases a kind Chimney effect occurs and that with a slope of 5o degrees around to the heating effect that occurs directly on the packaged goods hot combustion gases still have the heating effect of the combustion gases rising from the chimney

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single shrinkage aggregated below this optimization the shrinking performance by increasing the individual shrinking units can be extended even further, especially in the case of irregularly shaped or upwardly tapering pallet loads. increase in that, in a preferred embodiment, the individual shrinking units in the direction of their longitudinal axis, i.e. are arranged to be slidable towards the item to be shrunk * This ability to move is not absolutely necessary for all individual shrink units. It is beneficial, however Provided at least for the upper shrinking units, expediently also for the bottom unit. But among other things, on every possible one Packaging form to be set, the once in a pack tapering towards the middle over the height can exist, however, it is advisable to

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to make aggregates displaceable in the axial direction.

So it is' with this advantageous embodiment possible, for example, the top individual shrinking unit so far to move forward so that it can cause the top shrinkage, so that no additional of for this top shrinkage above-acting heating unit is required, such as that of gate-shaped or gallows-shaped shrink devices is known *,

For achieving top shrinkage, see the invention The device still advantageously improve that in front of the outlet opening of the respective uppermost operated Sing © 1-Shrink aggregate it a shaft-shaped ^ downwards Open hood is arranged · .This hood catches the aground the previously described chimney effect from the

lower single vault units on rising hot gases and flip them over to the top of the stack to be wrapped, so that a great © effectiveness in the use of heating power the heating gases used for shrinking © is achieved.

Since the device according to the invention to the maximum occurring Pallet height is designed, but also lower pallets by switching off the upper individual shrinking units can be shrunk, the shaft-shaped hood is expediently not fixed to the flame tube of the top single shrink aggregates connected, but in the area of the leading edge the supporting structure on a guide column vertically arranged displaceably. This makes it possible in a simple manner, with different heights of the goods to be wrapped, to guide the shaft-shaped hood over the flame tube of the uppermost operated single scraper unit3. It Of course, other embodiments are also conceivable for this, for example a simple clamp fastening of the shaft-shaped Hood in the area of the front outlet opening of the

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Heating gases from the individual shrink units.

The ability to move the lower individual shrink unit in the axial direction has the great advantage that this single shrink unit in the lowest area of the film envelope, i.e. in the area of the wooden pallet is brought so close to this that the lower area of the overhanging foil cover is preferred is heated and shrunk, wraps itself around the edge of the pallet and is fixed there, so that the previously frequently used Fixing the shrink hood with staples, etc. is unnecessary will.

The invention is explained in more detail below with reference to drawings:

Fig. 1 shows a mobile heating column with inclined individual shrinking units in conjunction with a shrunk Palette.

Fig. 2 shows a corresponding device in which the individual shrinking units are also arranged to be displaceable in the axial direction.

The individual shrinking units 3 are perpendicular with respect to the upwardly extending support structure 35 »of the heating column 1 inclined - in such a way that the angle between the vertical and the axis of the individual shrinking units is approx. Is 6o degrees. In the area of the front edge of the supporting structure 35, the covering hood 29 is on the guide column 31 Above and below displaceable arranged and can be with the clamping device 3o above the individual shrinking unit 3 clamp, as the top single shrinking unit according to the respective height of the packaging material to be shrunk 33 is operated. The heating column 1 is designed to be movable and mobile by rollers 9, so that they can be easily approached to the item 33 to be shrunk can, which is stacked on a pallet 32 in the example shown. About the good 33 to be shrunk is the

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Pulled away plastic film in the form of a shrink hood 34.

Fig. 2 shows a corresponding arrangement, but with the additional feature that d5.e single shrinking units 3 are arranged displaceably on slide rails 36 in the sight of their longitudinal axis. The lowest single shrinking unit is pulled further forward in order to ensure a good undershrinkage, i.e. a plague shrinkage of the lower end of the Shrink hood 34 under the upper floor of the pallet 32. The The top shrinking unit ^ has been moved forward as far as possible and arranged above the packaged goods 33, so that the top shrinkage is effected with this single shrinking unit 3. This effect is further intensified by the fact that the cover 29 removes the individual shrinking units located further below 3 absorbs rising heat and throws it back onto the top of the packaged goods 33 * As in the example shown here of package-shaped packaged goods 33, the upper packaged goods layer is arranged set back, the next lower level is also gel ^ ne Sinzei shrinking unit 3 pulled a little forward, in order also in this step-shaped area of the packaged item 33 shrinking the shrink hood 34 as tightly as possible guarantee.

The distance between the individual shrinking units 3 from uifen to the top increases somewhat because the ones rising from below are still hot combustion gases also affect the upper areas the shrink hood 34 act and so through the upward further distance for an approximately equal heating density over the entire height is ensured.

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Claims (2)

Applicant: Ahrendt + Birkendahl oHG-, 4o5 Mönchengladbach-Hehn Hehn 113 b 2352278 Pat / 286 / Uh-Hx. (o Claims. 1.} Device for shrinking goods, in particular on goods on pallets, in plastic film under the action of heat, according to patent application P 21 53 00I.8 several from a burner pot for mixing and ignition of heating gas and supply air, an ignition device and a flame tube existing single shrinking units are combined into a heating column, ds, darch marked, that the single shrinking aggregates (3) in relation to the vertical axis of the heating column (1) are inclined. 2. Apparatus according to claim 1, characterized in that the individual shrink units (3) to the vertical axis of the Make the heating column (1) an angle of 60 £ Io degrees. 3 * Apparatus according to one of claims 1 and 2 _4, characterized in that the single-shrink units are arranged (3) displaceable in the direction of its longitudinal axis on a slide rail (56). 4 ·. Device according to one of Claims 1 to 3 »characterized in that that in order to achieve a good upper shrinkage in front of the outlet opening of the respective top one operated Single shrinkage aggregates (3) a shaft-shaped, according to is arranged at the bottom open cover (29). 409821/0 3U Device according to one of Claims 1 to 3 and Claim 4, characterized in that the shaft-shaped cover hood (29) on a guide column (31) located in the area of the door edge of the supporting structure (35) on the heating column (1) is arranged vertically displaceable. 40 9821/0314