DE102008047450A1 - Plastic container - Google Patents

Abstract

A plastic container (1) having a bottom (2) which has a different cross section from a circular cross section, wherein in a central region of this bottom (2) an injection point (4) is provided. According to the invention, the bottom (2) has at least two first radially extending main ribs (6a, 6b) which extend in a straight line over the bottom (2) in such a way that a geometric connecting line (L1) runs through the injection point (4) Injection point (4) in a in the direction of the interior of the plastic container (1) extending first recess (12) of the bottom (12) is arranged and this recess (12) separates the two first main ribs (6a, 6b) from each other.

Description

The The present invention relates to a plastic container, which are used in particular for drinks can. In the field of beverage manufacturing industry have in recent years more and more plastic containers prevailed over glass bottles. There are many different ones Basic shapes or cross sections for such plastic bottles known. On the one hand have such plastic containers often circular cross sections, but it is also known the containers with a rectangular or square cross-section to provide. The latter embodiment brings in particular Advantages in terms of space utilization during storage and in terms of the stability.

Farther One is also anxious, the material consumption in the production to reduce such containers ever further. This causes the walls and also the bottom of this Containers always made thin-walled become. On the other hand, however, make sure that the bottle wall and in particular the bottom of these containers stable enough is done, on the one hand to own weight to withstand a filled bottle and on the other hand also a possible resulting internal pressure, especially with carbonaceous Drinks. In the prior art are for the Bottling of carbonated drinks always Bottles used with a round cross section. Such containers go hand in hand with increased material requirements, a limited pressure resistance as well also a worse tilt stability due to the circular Section.

The WO 2006/067590 A1 describes a bottle bottom made of plastic. More precisely, reinforcing recesses are provided which extend transversely with respect to this bottle bottom, wherein a continuous main rib is arranged in the bottom. The floor itself has a square cross-section with rounded corners. The said main ribs extend up to an injection point of the container. By such a design of the bottle bottom, an increased stability can be achieved, but in particular in the region of the injection point, unfavorable stress distributions result, if necessary, through the design of the corresponding reinforcing ribs.

Of the The present invention is therefore based on the object, the stability from heights of plastic bottles continue to increase and in particular to increase the pressure resistance. In addition, should also the material requirements for the production of plastic containers be further reduced.

This is inventively by a plastic container achieved according to claim 1.

advantageous Forms of training and further developments are the subject of the dependent claims.

One has plastic container according to the invention a bottom, one of a circular cross-section having a different cross section, wherein in a central area this bottom is provided an injection point.

According to the invention the bottom has at least two first radially extending main ribs, which extend in a straight line over the ground in such a way that a geometric connecting line through the injection point runs. Furthermore, the injection point is in a preferably in the direction of the interior of the Kunststoffbehältniss extending arranged first recess of the floor, said recess the first two main ribs are separated. Preferably while this recess is formed circular surrounds the Injection point completely.

With In other words, the bottom in the region of the recess or the Injection point on a dome-like structure, wherein the injection point itself preferably sitting in the center of this dome-like structure.

Under one deviating from a circular cross section Cross section will be particular but not exclusive square or rectangular cross-sections understood, with a square cross section is also such a cross section, the more or less rounded corners and between these corners having substantially rectilinear sections.

By the separation of the two main ribs and through the recess is achieved an increased stability of the soil. Especially contributes said recess to, in the central region of the Soil to increase its stability. Preferably the two main ribs reach up to the recess or Contact. In this way, a particularly stable framework be made in particular in the region of the said recess. In the following, ribs are to be understood in particular as rectilinearly extending recesses, which preferably in the direction of the interior of the container extend. Through these ribs is a material reinforcement achieved without the wall thickness considerably increased in the area of the soil. Farther With the help of these ribs can also the stability of the container be increased on its floor area.

at a further advantageous embodiment, the Bottom two second main ribs, which are rectilinear in such a way over extend the ground that a geometric connecting line through runs the injection point. In other words, extend also these two second main ribs starting from the injection point or a longitudinal axis of the container in the radial Direction. By these two other main ribs can the stability be increased in other directions of the soil.

there the recess preferably also separates the two second main ribs from each other, whereby here also particularly preferred the main ribs approach or even reach into the recess. In a further preferred embodiment is the first geometric connecting line substantially perpendicular to the second geometric connecting line. Form in this way the two first main ribs and the two second main ribs Cross out, which extends over the bottom of the bottle.

The both preferably arranged at right angles to each other main ribs or tension bands preferably have an inner radius, between 30 mm and 60 mm, preferably between 35 mm and 50 mm and more preferably between 40 mm and 50 mm. All Main ribs are, as I said, preferred by the recess or the central dome interrupted, with the injection point in the middle this recess is located. The recess preferably has one Radius between 4 mm and 25 mm, preferably between 6 mm and 20 mm and more preferably between 8 mm and 15 mm. The main ribs or drawstrings set advantageous at the outlet of this Recess on.

The Wall thickness at the point of approach of the main ribs on the recess is advantageous relatively high and serves to achieve a high Pressure stability. On the other hand, the size the diameter of the recess important for the steepness the main ribs and thus also crucial for the material requirements. Characterized in that the injection point withdrawn within the recess is, so moved towards the interior of the container is, is at a ground contact of the container to a Improvement of ground clearance contributed.

By the preferred use of four main ribs or drawstrings the pressure resistance of the container is increased. The four main ribs distribute the internal pressure more homogeneously on the square Cross-section. In this way, a pressure-stable floor is up reached to an internal pressure of more than 3 bar. Furthermore are a low material usage and besides a high tilt angle guaranteed.

By This cross of the main ribs is a high stability of the Soil and thus the entire container accessible. Preferably, at least one main rib extends to one Edge of the ground. In a further advantageous embodiment all main ribs extend to each assigned to them Edge of the ground. Advantageously, the respective main ribs do not extend only to the edge of the floor but beyond in an area of the container that is attached to the ground connects, for example, a curved transition area, with which the bottom passes into the side wall of the container.

at a further advantageous embodiment, the Floor on a symmetrical cross-section. Preferably, the Floor designed such that it has multiple geometric axes of symmetry gives. So it is possible, for example, that the first main ribs and also the second main ribs respectively symmetry axes of the soil form. The soil is also advantageous in terms of the arrangement of individual main ribs, or the recesses in which the main ribs are arranged symmetrically designed.

at a further advantageous embodiment, the Edge of the floor four substantially rectilinear sections on. Under a straight line section becomes such a section which has a radius of curvature of more than 300 mm. Furthermore, the edge of the bottom preferably has four Corner sections with a predetermined radius of curvature. In order to Overall, a substantially square cross-section is provided, which has four rectilinear sections and between these rectilinear ones Sections each corner sections with predetermined radius of curvature.

at a further advantageous embodiment is between at least one first main rib and at least one second Main rib a sub-rib arranged, with this sub-rib along a geometric line runs, which in turn through runs the injection point. This extends to the Sub-rib in the above-mentioned radial direction and contributes in this way to a stabilization of the soil, especially in the area lying between the main ribs, at.

Preferably The bottom between the main ribs has four side ribs. In order to form in this preferred embodiment, the four main ribs, such as mentioned above, form a cross and also the four side ribs a cross, since here also particularly preferred the extension lines these side ribs are perpendicular to each other.

at In another advantageous embodiment, each of the Secondary ribs shorter than each of the main ribs. Prefers The side ribs do not extend to the above-mentioned Recess and particularly preferably they do not extend to the edge of the container. Preferably, the stand Connecting lines per two side ribs substantially perpendicular each other.

at extend a further advantageous embodiment the main ribs are either parallel or perpendicular to the rectilinear ones Sections. Preferably, the main ribs extend starting from the recess to the respective rectilinear edges, where they meet these edges substantially in the middle or cut. The connecting lines of the side ribs extend in this embodiment, preferably in the direction of rounded corners, more precisely, preferably in the geometric center these corners.

Further advantages and embodiments will be apparent from the attached drawings:
Show:

1 a view of a container according to the invention;

2 a plan view of a bottom of a container according to the invention;

3 the ground out 2 to illustrate different perspectives;

4 a view of the ground 3 along the line AA 3 ;

5 a detail of in 4 shown illustration;

6 a view of the in 3 shown floor along the line BB 3 ;

7 a view of the ground 3 along the line FF 3 ;

8th a side view of a floor according to the invention.

1 shows a container according to the invention 1 , This container has an orifice 3 on and a wall body 5 and a floor 2 , Stabilizing ribs can also be arranged in the region of the wall body.

2 shows a plan view from below of a floor according to the invention. It can be seen here that this floor has a substantially square cross section, ie a wall 20 with straight sections 22 as well as rounded corners 24 having. the center of this floor is an injection point 4 intended.

This injection point in turn is within a recess 12 arranged with this recess 12 in the direction of the container interior, ie in the plane of FIG 2 hineinerstreckt.

The reference numerals 6a and 6b refer to first main ribs, which in 2 run horizontally. At the same time, these main ribs border 6a and 6b each around the recess 12 at. More specifically, these main ribs each have curved projections which are in the recess 12 protrude. In this way, a particularly stable design of the soil is achieved. The first two main ribs 6a . 6b extend along the geometric line L1. The two main ribs 6a . 6b are within a symmetrical with respect to this line L1 recess 9 arranged. This recess 9 extends, as well as the main ribs themselves inward, ie in the direction of the container interior.

The reference numerals 8a and 8b refer to two more main ribs, which are substantially perpendicular to the first main ribs 6a and 6b extend. These second main ribs 8a and 8b extend along a geometric line L2, as in 2 shown. Also these second main ribs 8a . 8b are in recesses 9 arranged.

The individual recesses 9 are symmetrical with respect to the respective lines L1, L2. The recesses 9 contribute together with the actual ribs to reinforce the soil. It would also be possible, in each case, the entirety of the respective main rib 6a . 6b . 8a . 8b and their recess 9 to define as the main rib.

The reference number 7 denotes an end portion of the individual main ribs 6a . 6b . 8a . 8b , This end portion protrudes into the recess 12 into and interrupts at these points the otherwise circular cross-section of this recess. This type of transition creates a particularly high stability of the soil.

In the main ribs shown 6a . 6b . 8a . 8b , are still minor ribs 16a . 16b . 18a and 18b intended. Here, the two side ribs extend 16a . 16b along the geometric line N1 and the two side ribs 18a and 18b along the geometric line N2. It can be seen that the side ribs are shorter than the main ribs and on the one hand neither to the recess 12 still extend to the edge 20 , The geometric line N2 is opposite to the geometric Li never shifted L1 by 45 degrees. The two geometric lines N1 and N2 are perpendicular to each other.

The ribs 16a . 16b . 18a . 18b are also in recesses 19 arranged, wherein these recesses axially symmetrical with respect to the lines N1, N2 extend.

3 shows a representation corresponding to those in 2 However, here different perspectives for the following figures are shown.

4 shows a section of the in 3 shown floor along the line AA 3 , One recognizes here in particular the two main ribs 6a and 6b which are in the recess 12 pass. You can see that the two main ribs 6a and 6b in their lower areas in a curved portion of the recess 12 pass. In the plan view of the main rib 8b is also recognizable as this within the recess 9 is arranged. The main ribs 6a and 6b have the in 4 embodiment shown a constant radius of curvature, which is preferably between 20 mm and 80 mm, more preferably between 30 mm and 60 mm and particularly preferably between 40 mm and 50 mm,

5 shows a detail of in 4 shown illustration. Here you can see the transition between the recess 12 of the injection point 4 and the first main rib 6b , In this area, a curvature is provided, wherein the radius of curvature starting from the area 32 towards the area 34 enlarged and in the area 35 a nearly rectilinear area is provided, directly to the main rib 6b followed.

6 shows a section through the bottom along the lines BB 3 ie a view of the side ribs 16a . 16b , In detail one recognizes here the two Nebenrippen 16a and 16b as well as the recess again 12 and the injection point 4 in the middle of it. In this case, the curvature of these ribs decreases 16a . 16b each outwards or inwards towards. In the fields of 36 There is a nearly straight course, ie here, the secondary rib is no longer or hardly exists. This is also in 2 seen.

Outward go the ribs 16a . 16b . 18a . 18b in the points or areas E in the bottom surface 40 above. This shows the side ribs 16a . 16b . 18a . 18b in these areas, and preferably also in the area 36 , tangential inlets and outlets with respect to the floor area 40 on. This is evident from the fact that in these areas the side ribs each lie in the areas lying between these ribs 40 of the soil 2 pass. In this way, wrinkling in the feet of the container 1 be prevented.

In a preferred embodiment, the diameter of the recess 12 between twice and eight times as large as the diameter of the injection point, preferably between 2.5 times and 6 times, more preferably between 3 times and 4 times as large.

7 shows a section of the soil 3 along the lines FF out 3 ie an area in which neither a main rib nor a sub-rib runs. In this area is in particular the course of the floor area 40 recognizable in a region in which neither main nor secondary ribs are arranged. It can be seen here that the radius of curvature first of the range 42 towards the area 44 increases, then in the area 46 decrease sharply. In one 48 However, there is also a curvature in the opposite direction, before.

8th shows a side view of the soil according to the invention 2 , One recognizes also here that the main ribs 6a very much further up, ie towards the estuary 3 of the container extends as the respective side ribs 16a . 18b ,

The reference number 50 refers to feet, which are each formed between a main rib and a side rib. On this foot stands the container 1 , At the in 1 In the embodiment shown, the container has eight such feet 50 on.

All Features disclosed in the application documents are considered to be essential to the invention as far as they are individually or in combination the prior art are new.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2006/067590 A1 [0003]

Claims (14)

Plastic container ( 1 ) with a floor ( 2 ), which has a cross section deviating from a circular cross section, wherein in a central region of this bottom ( 2 ) an injection point ( 4 ), characterized in that the floor ( 2 ) at least two first radially extending main ribs ( 6a . 6b ), which in a straight line over the ground ( 2 ) extend that a geometric connecting line (L1) through the injection point ( 4 ), wherein the injection point ( 4 ) in a direction towards the interior of the plastic container ( 1 ) extending first recess ( 12 ) of the soil ( 2 ) is arranged, and this recess ( 12 ) the first two main ribs ( 6a . 6b ) separates from each other. Plastic container ( 1 ) according to claim 1, characterized in that the two first main ribs ( 6a . 6b ) to the recess ( 12 ) come close. Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that the bottom ( 2 ) two second main ribs ( 8a . 8b ), which in a straight line over the ground ( 2 ) extend that a geometric connecting line (L2) through the injection point ( 4 ) runs. Plastic container ( 1 ) according to claim 3, characterized in that the recess ( 12 ) the two second main ribs ( 6a . 6b ) separates from each other. Plastic container ( 1 ) according to claim 3, characterized in that the first geometric connecting line (L1) is substantially perpendicular to the second geometric connecting line (L2). Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that at least one main rib ( 6a . 6b . 8a . 8b ) to an edge ( 20 ) of the soil ( 2 ). Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that the bottom ( 2 ) has a symmetrical cross-section. Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that an edge ( 20 ) of the soil ( 2 ) four substantially rectilinear sections ( 22 ) having. Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that the edge ( 20 ) of the soil ( 2 ) four corner sections ( 24 ) having a predetermined radius of curvature. Plastic container ( 1 ) according to at least one of the preceding claims, characterized in that between at least one first main rib ( 6a ) and at least one second main rib ( 8a ) a minor rib ( 16a ), said sub-rib extending along a geometric line (N) passing through the gate ( 4 ) runs. Plastic container according to claim 10, characterized in that between the main ribs ( 6a . 6b . 8a . 8b ) four secondary ribs ( 16a . 16b . 18a . 18b ) are arranged. Plastic container according to claim 10, characterized in that each secondary rib ( 16a . 16b . 18a . 18b ) is shorter than each of the main ribs ( 6a . 6b . 8a . 8b ). Plastic container according to claim 11, characterized in that the connecting lines (N1, N2) each have two secondary ribs ( 16a . 16b . 18a . 18b ) are substantially perpendicular to each other. Plastic container ( 1 ) according to at least one of the preceding claims 8-13, characterized in that the main ribs ( 6a . 6b . 8a . 8b ) either parallel or perpendicular to the rectilinear sections ( 22 ).