WO2016041609A1

WO2016041609A1 - Extrusion blow-moulded plastic canister

Info

Publication number: WO2016041609A1
Application number: PCT/EP2014/076850
Authority: WO
Inventors: Eric Frohn
Original assignee: Dr. Ing. W. Frohn Gmbh & Co. Kg
Priority date: 2014-09-17
Filing date: 2014-12-08
Publication date: 2016-03-24
Also published as: DE202014007425U1

Abstract

The invention relates to an extrusion blow-moulded plastic canister (1) comprising a rectangular base area (2) and planar side walls (3), a maximum radius (4) of 25mm extending between two side walls (3) and the base area (2) having an aspect ratio of between 1.10 and 1.15.

Description

Extrusion blown plastic canister

description

The present invention relates to an extrusion blown plastic canister. In particular, the invention relates to such a canister, which is characterized by simple, safe and efficient stackability.

Plastic canisters made by extrusion blow molding are known in the prior art for transporting liquids therein, for example. The liquids are filled and transported in a variety of canisters, the canisters are arranged in multiple layers on pallets. This creates layers that form a composite. In this case, several layers of plastic canisters are usually arranged one above the other on a pallet and fixed with a packaging film (stretched). Which used in most cases in Europe W

2

Pallet is a standard pallet named EURO pallet (type designation CP2), which has a stacking area dimension of 800mm x 1200mm.

A EURO pallet does not have a continuous full-surface footprint for the canisters, but has five pieces of longitudinally running deck boards, between which exist about 40 mm wide spaces. Since thin-walled plastic canisters deform under pressure, it is necessary to find a stacking scheme that guarantees the most uniform possible launch of the stacking weight on the bottom of the lowest, standing on the pallet canister. In the prior art, this is achieved in that the largest possible cross-sectional area of the canister is selected so that the largest possible part of the canister bottom is supported on the cover boards of the pallet. This minimizes the risk of uneven application of force to the bottom of the container.

For example, a 30 liter capacity canister designed to be transported on a EURO pallet in accordance with European standard EN 12712 has a cross-sectional area of 295 mm x 395 mm, which means that a number of eight containers per layer is on a EURO pallet fit. Since for reasons of stability usually not more than 3 layers can be used, thus a number of 24 containers per EURO pallet is possible.

It is an object of the invention to provide a plastic container, which has an optimal stackability with simple, efficient, safe and cost-effective production.

The object is achieved by the features of claim 1. Thus, the object is achieved by an extrusion-blown plastic canister, which has an approximately rectangular bottom surface and approximately flat side walls. By extrusion blow molding the canister is very easy and inexpensive to produce, which also has a flexibility in its shape. Thus, it is possible to implement various shapes of the plastic canister. According to the invention it is provided that between two side walls a radius of max. 25 mm is available. The radius is in particular present between side walls, which are arranged at right angles to each other. Thus, it is also provided in particular that the base has no sharp corners, but rather the said radius of max. 25 mm. In this way, the floor area is maximized, so that a safe and reliable stand is guaranteed. This is particularly advantageous over known plastic canisters having radii of at least 50 mm, usually more than 100 mm. Finally, the invention provides that the bottom surface has an aspect ratio between 1, 10 and 1, 15. In this way it is ensured that a large number of extrusion-blown plastic canisters can be arranged on a EURO pallet, wherein the composite of plastic canisters and EURO pallet has a high stability. Advantageously, the extrusion-blown plastic cylinders are shaped such that they are stackable, which means that a plastic canister can be placed on another plastic canister, wherein both plastic canisters have a secure and stable hold.

The dependent claims show preferred developments of the invention.

It is preferably provided that the bottom surface has an aspect ratio of 1, 11. In particular, deviations of 1% upwards or downwards are possible. Such an aspect ratio ensures that maximum space utilization takes place when the extrusion-blown plastic canisters are mounted on a EURO pallet. Thus, a maximum volume of goods transported on a EURO pallet can be transported, so that the transport costs are reduced compared to plastic canisters from the prior art.

Advantageously, the radius between two side walls is a maximum of 10 mm, in particular a maximum of 7 mm. These radii can be made in an extrusion blow molding process while maximizing the volume of the plastic canister. In addition, it is preferably provided that the base has the same radii, so that between two outer edges of the base also a radius of max. 10 mm, in particular of max. 7 mm is available. In this way, the base area is maximized, so that a safe and reliable state of the plastic canister is ensured. In this way, the plastic canister is also better stackable, since a secure stand is guaranteed.

A length of the plastic canister is advantageously between 290 mm and 295 mm, the limits being included. Again, deviations of 1% in both directions are possible. Such a dimension allows in particular the arrangement of up to four plastic canisters along the longitudinal side of a EURO pallet. Thus, the length of a EURO pallet to 97% to 98% occupied by the plastic canisters, whereby a high utilization of space is achieved. This allows a maximum volume of liquid to be transported to place on the EURO pallet.

Likewise, a width of the base is preferably between 260 mm and 265 mm, the limits being included. Advantageously, deviations of up to 1% in all directions are again possible. Such a width allows up to three canisters to be arranged along a broad side of the EURO pallet. Thus, the space utilization in the direction of the width of the EURO palette is again between 97% and 98%, which is why the space provided by the EURO palette is optimally utilized. Thus, in turn, a maximum amount of liquids to be transported can be placed on the EURO pallet. Together with the above-mentioned preferred length of the extrusion-blown plastic canisters, it is therefore possible that a layer of 12 plastic canisters is placed on the EURO pallet. With the usual use of three layers thus a stacking of up to 36 plastic canisters on a EURO pallet is possible. Compared to the prior art, the number of canisters is thus significantly increased. This also means that the amount of liquid that can be transported with a EURO pallet increases significantly. In this way, the transport costs can be significantly reduced. In order to improve the stackability, the extrusion-blown plastic canister has a planar upper side, with ball-shaped or angular elevations being mounted on the planar upper side. On the plan top further plastic cans can be arranged, which can be locked by the spherical segment-shaped elevations.

Particularly advantageously, the bottom surface of the extrusion-blown plastic canister has kugeisegmentförmige or angular recesses, which are advantageously formed complementary to the spherical segment-shaped or angular elevations. Thus, an at least partial positive locking is given when two plastic canisters are stacked on each other. This provides a stable and secure hold, so that the plastic canisters are easy and safe stackable.

Preferably, the plastic canister has an orifice, via which the plastic canister can be filled and via which the contents can be removed from the plastic canister. Likewise, the canister advantageously has a handle with which the plastic canister can be carried. It is envisaged that both the mouth and the handle are mounted offset from the top in the direction of the bottom surface. The flat top is broken by neither the handle, nor by the mouth. Thus, neither the handle nor the mouth prevent the previously described stackability of the extrusion-blown plastic cans.

The flat top is in particular U-shaped, with the flat top surrounding the mouth and the handle. Thus, in particular, a compact design is realized, whereby the canister has a high stability. Due to the high stability of the plastic canister is optimally stackable.

Finally, it is preferably provided that the plastic canister has a nominal volume between 20 liters and 30 liters. The limits are included. Deviations of up to 10% are possible in both directions. It has been found that such a nominal volume is optimal for most transport purposes. Consequently W

6 the maximum amount of liquid that can be transported per EURO pallet can be divided into ideal quantities.

Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:

Fig. 1 is a schematic illustration of an extrusion blown

Plastic canister according to an embodiment of the invention,

Fig. 2 is a schematic illustration of a EURO-pallet, are stacked on the partially extrusion-blown plastic canisters according to the embodiment of the invention, and

Fig. 3 is a schematic illustration of a EURO-pallet on which two complete layers of extrusion-blown plastic canisters according to the embodiment of the invention are stacked.

Fig. 1 shows an extrusion-blown plastic canister 1 according to an embodiment of the invention. The plastic canister 1 comprises a bottom surface 2, which has the shape of a rectangle. The bottom surface 2 has a length L and a width B. It is provided that the length L comprises a value between 290 mm and 295 mm, while the width B preferably has a value between 260 mm and 265 mm. In both cases, the limit values must be included.

Furthermore, the plastic canister 1 comprises side walls 3, which extend from the outer edges of the bottom surface 2 substantially in the vertical direction. The side walls 3 are particularly flat. Between two side walls 3, which are arranged perpendicular to each other, extending a radius 4 of a maximum of 25 mm. In the embodiment shown, the radius 4 is 7 mm. The radius 4 also extends between two mutually perpendicular outer edges of the bottom surface 2, so that the bottom surface 2 has a maximum surface area. Due to the extrusion blown process, it is not possible to dispense with the radius 4 entirely. In the prior art, the radius 4 is usually chosen to be greater than 50 mm, since at smaller radii have reservations about the reliability of the extrusion blown. However, it has surprisingly been found that, in principle, it is also possible to produce plastic canisters by means of an extrusion blow molding method if the radius 4 is less than 10 mm, in particular 7 mm. Thus, the bottom surface 2 and thus the footprint of the plastic canister 1 is maximized, whereby a safe and reliable state of the plastic canister 1 is present. This also allows a good stackability of the plastic canister.

In order to ensure the stackability, the plastic canister 1 has a planar upper side 5, which extends in a U-shape around a handle 8 and around an orifice 7 of the plastic canister 1. It is provided that both the handle 8 and the mouth 7 are offset from the flat top 5 in the direction of the bottom surface 2, so that the flat top 5 is not broken by the handle 8 or the mouth 7. This allows the placement of a plastic canister 1 with the bottom surface 2 on the flat top 5 of another plastic can 1.

In order to further increase the stackability, the flat upper side 5 has four spherical-segment-shaped or angular elevations 6, which enable latching. For this purpose, the plastic canister 1 has four spherical segment-shaped or angular depressions, not shown, in the bottom surface 2. Now, if two plastic canisters 1 stacked on top of each other, the spherical segment-shaped or angular elevations 6 engage in the spherical segment-shaped or polygonal recesses, whereby at least partial positive engagement is given. Thus, a safe and reliable state of the plastic canister 1 is ensured on a further plastic canister 1.

FIGS. 2 and 3 each show a EURO pallet 10, on which plastic cans 1 are stacked. In particular, the EURO pallet has a length X of 1200 mm and a width Y of 800 mm. 2 shows that the EURO pallet 10 is only partially provided with plastic canisters 1. Thus, it is apparent from Fig. 2, that the choice of the width B of the plastic canister 1 is ensured that the plastic canisters 1 always sit on at least two deck boards 9 EURO pallet 10. This allows an optimal introduction of force into the EURO pallet 10, wherein at the same time a deformation of the plastic canister 1 is avoided. The force is introduced at the arranged in the direction of the width Y of the EURO pallet 10 rows of plastic canisters 1 each in two cover boards 9. In the middle row of plastic canisters 1, the force is applied in three cover boards 9. It is ensured in each case that the introduction of force per Plastic canister 1 is symmetrical, so that in an arrangement of a matrix of three plastic canisters 1 in the direction of the width Y of the EURO pallet 10 and four plastic canisters 1 in the direction of the length X of the EURO-10 Paiette a uniform force is introduced into the EURO pallet 10 , Thus, a dense arrangement of the plastic canisters 1 is possible, whereby a stacking of multiple layers of plastic cans 1 with three times four plastic canisters 1 per layer on the EURO pallet 10 is made possible. This case is shown in FIG.

Due to the mentioned advantages Einknickungen and deformations during the transport of the plastic canisters 1 are prevented. At the same time a maximum possible amount of contents on the EURO pallet 10 is transported. Thus, a cost-effective transport is possible.

The plastic canisters 1 advantageously have a nominal volume of 30 liters. From the prior art it is known to arrange canisters with a nominal volume of 30 liters only in layers of eight plastic canisters. Thus, with the invention, the maximum amount of contents to be transported on a EURO pallet 10 increases by 50%. At the same time a high tilt stability and a secure state of the individual plastic canisters 1 on the EURO pallet 10 is given.

The invention is also applicable to smaller canisters, for example with a nominal volume of 20 liters, or larger canisters with a higher nominal volume. LIST OF REFERENCES

1 plastic canister

2 floor space

3 side walls

4 radius

5 flat top

6 spherical segment-shaped elevation

7 estuary

8 handle

9 deck board

10 euro range

L Length of the plastic canister B Width of the plastic canister

X Length of EURO pallet

Y Width of EURO pallet

Claims

claims

An extrusion-blown plastic canister (1) comprising a rectangular bottom surface (2) and planar side walls (3), wherein between two side walls (3) a radius (4) of at most 25 mm is present, and wherein the bottom surface (2) has an aspect ratio between 1, 10 and 1, 15.

2. Extrusionsgeblasener plastic canister (1) according to claim 1, characterized in that the bottom surface (2) has an aspect ratio of 1, 11.

3. Extrusion blown plastic canister (1) according to one of the preceding claims, characterized in that the radius (4) between the side walls (3) is a maximum of 10 mm, in particular a maximum of 7 mm.

4. Extrusion blown plastic canister (1) according to one of the preceding claims, characterized in that the base has a length (L) between 290 mm and 295 mm.

5. extrusion blown plastic canister (1) according to one of the preceding claims, characterized in that the base has a width (B) between 260 mm and 265 mm.

6. Extrusionsgeblasener plastic canister (1) according to any one of the preceding claims, characterized by a flat top (5), wherein on the flat top (5) spherical segment-shaped elevations (6) are mounted.

7. Extrusionsgeblasener plastic canister (1) according to claim 6, characterized in that the bottom surface (2) has spherical segment-shaped depressions, which are in particular formed complementary to the spherical segment-shaped elevations (6).

8. extrusion blown plastic canister (1) according to any one of claims 6 or 7, characterized in that an orifice (7) and a handle (8) from the top (5) in the direction of the bottom surface (2) are mounted offset, wherein the plane Top (5) of the mouth (7) or the handle (8) is not broken.

9. Extrusionsgeblasener plastic canister (1) according to claim 8, characterized in that the planar upper side (5) is U-shaped and the mouth (7) and the handle (8) surrounds. lO. Extrusion-blown plastic canister (1) according to one of claims 6 to 9, characterized by a nominal volume of between 20 liters and 30 liters.