DE2740262A1 - Plastics container with upright walls - has walls stepped inwards to reduce thickness below doubled-over portion - Google Patents

Abstract

The plastic container comprises a floor and four upright walls, the tops of which are doubled over to form a portion with J-shaped cross-section. The outside (14) of each wall (2) forming the long arm of the J-section is stepped inwards from a point (15) below the end (12) of the short arm (7) to the floor (1), reducing the wall thickness. The distance of the point (15) from the floor, or from a flange (16) higher than the floor, can be at least equal to its distance from the underside of the top transverse web (8) of the J-section.

Description

Plastic container

The invention relates to a plastic container consisting of consists of a floor and four upright walls, the upper areas of which are double-walled are designed to form a wall profile with a J-shaped cross-section.

In the manufacture of known such plastic containers in which the J-shaped cross-section is used to stiffen the container so that it is stacked on top of each other a large number of filled plastic containers whose walls do not bend apart and the cohesion of the stack is maintained, the difficulty arises that in some cases the outside of the container below the wall profile part with J-shaped cross-section is damaged when removing the core part, which during injection molding in the die to form the wall profile with a J-shaped cross-section is used.

Because the wall area that is below the wall profile with J-shaped cross-section is used for the anoring of prints, is such damage the outside of the wall very annoying. This applies even more so than after attaching the Printing or decoration on the outside of the wall stand out even more clearly.

The invention provides a remedy here and achieves this in the case of a plastic container of the type specified in that the outside of the long leg of the J-shaped cross-section forming walls from one below the end of the short leg of the J-shaped cross-section to the ground is offset towards the inside by reducing the wall thickness.

By settling the outside of the the long leg of the J-shaped Cross-section-forming wall inwards can be used in the manufacture of the container Core part arranged in the wall profile with a J-shaped cross-section, easy to remove from the mold be moved down without damaging the outside of this Wall area are caused. In this way, the core part can always be without the slightest damage to the outside of the container walls from the wall profile J-shaped cross-section can be removed.

The starting point from which the outside of the long one starts Walls forming the legs of the J-shaped cross-section are offset towards the inside, has one from the floor or from a flange higher than this Distance that is at least equal to its distance from the underside of an upper connecting part of the J-shaped cross-section. In practice this is the distance from the starting point mentioned from the ground or

The flange is usually larger than its distance from the underside of the connecting part of the J-shaped cross section.

In any case, this configuration ensures that the Outside of the wall part that belongs to the long leg of the J, also simple Way before any damage when removing the core part from the injection molded Container is protected.

The length of the inwardly offset outer side area of the container walls can also be approximately equal to half the distance between the underside of the connecting part of the J and the floor or flange. Here can the inwardly offset outer side area is expedient only in the middle area the container walls be provided, the container walls in the ground or the area adjacent to the flange the same thickness as above the starting point for may have the offset outer side area.

This middle, inwardly offset outer side area can be approximately with a labeling field provided on the outside of the container walls cover. Any damage occurs below such a labeling field the outside of the container walls are not so annoying. In addition, this Ausgestaltu g given the same wall thickness of the container walls in the Bodenbereicn as in Desired upper area within the J-cross section 3 in the interest of a wall reinforcement be.

The container is also expediently provided with a compartment division, e.g. For holding individual bottles or packaging units comprising several bottles Mistake.

By using inwardly offset outer side areas of the Container walls can now contain containers with completely closed walls at the beginning specified type without damaging the outside of the container walls are, while in the further known container shape the walls in the rule are provided with large openings, with the difficulties mentioned at the beginning of course not occur. Containers with completely closed walls however, ensure the preservation of the good quality of what is transported in them Good things like liquids, e.g. beer, because when stacking a large number of plastic containers these liquids, especially beer, are completely protected from the effects of light by the closed walls.

Further features and advantages of the invention emerge from the claims and the following description in conjunction with the drawing, in which an embodiment of the subject invention is illustrated.

The drawings show: FIG. 1 a perspective view of a plastic container Representation, FIG. 2 shows a section along the line II-II of FIG. 1 with a core part, which was in the die during the injection molding of the container, and Fig. 3 shows a representation corresponding to FIG. 2, but after the core part has been pushed down In the drawing, a plastic container is shown, which has a bottom 1 with four Sidewalls 2,3,4 and 5 includes. The interior of the container is in that shown Example provided with a compartment division 6.

The upright or vertical container walls 2 to 5 are double-walled in their upper areas, where how based the wall 2 shown, this merges into a bent wall part 7, which together with a connecting part 8, which is also the upper edge of the plastic container forms, with the wall 2 forms a J in cross section. The walls 2 to 5 are with protruding Flanges 16 with angled legs 9 for fixing containers stacked on top of one another Mistake.

during the injection molding of such a container, a core part 10 attached to form the wall profile 2,8,7 with a J-shaped cross-section. After To manufacture the container, the core part 10 must be pushed down to remove the container from the mold will. Of course, the container opposite the core part can also be used instead 10 can be pulled up.

When removing the Xernteils 10, the outside 11 with the below the end 12 of the wall part 7 lying wall part 13 of the plastic container in contact, causing damage in the form of lines or grooves can.

z h the invention, this is now avoided in that the outside 14 of the wall part 13 is offset inward, xodurchen the outer side 11 of the core part 10 along the outside 14 of the vertical container walls 2 to 5 of the plastic container contact-free with this can be moved.

The starting point 15 of the inwardly offset outer side area 14 of the wall part 13 is lower than the end 12 of the bent wall part 7 of the wall profile with a J-shaped cross-section. The starting point 15, on the other hand, has from Bottom 1 or the flange 16 a greater distance than from the underside of the connecting part 8, so that it is ensured that the core part 10 with respect to the vertical walls 2 to 5 of the plastic container can be moved down. With the one shown Example, the starting point 15 is higher than half the distance between the floor 1 resp.

the flange 15 and the underside of the connecting part 8. Measured from the starting point 15 downwards, this is the length of the stepped inwards The outer side area 14 is larger than the height dimension of the core part 10.

However, the length of the inwardly offset outer side region 14 can also be approximately equal to or less than the height of the core part 10. The height measure of the core part 10 is, as can be seen from the drawing, during the injection molding only partially within the wall part 7, connecting part 8 and the adjoining area the wall 2 or 3 to 5 of the delimited space.

Fig. J shows the core part 10 after it is opposite the wall profile 2,8,7 J-shaped cross-section relatively after has been moved down, so far that it is withdrawn in the direction of the arrow shown in FIG can be. During the initial downward movement of the core part 10 from the J-profile the area of the container wall 2, which has not yet been reduced in its thickness, acts in between the beginning, point 15 and the plane of the end 12 of the wall part 7 as a guide for the vertical leg of the core part 10, which ensures under all circumstances is that the vertical leg of the core part 10 with its outside 11 at a distance from the inwardly offset outer side 14 of the wall part 13 relative moved down.

A particular advantage of the plastic container described and illustrated is that in contrast to the known prior art, according to which instead the inwardly offset outer side area of the container walls has a large opening is present in these, these container walls are kept completely closed can without a significantly increased material consumption associated with it. It can In this case, plastic containers with only small openings are also created. Beh: iLter of the type described so far offer the great advantage that when stacked on top of each other the container does not expose the goods packed in it, e.g. bottled beer, to light which would otherwise be detrimental to quality.

Claims (4)

Claims: 1. Plastic container, consisting of a base and four upright walls, the upper areas of which are double-walled to form a wall profile with a J-shaped cross-section, characterized in that that the outside (14) of the lances form the scerkel of the J-shaped cross section Walls (2,3,4,5) starting from one below the (12) of the short leg of the J-shaped cross-section located starting point (15) to the bottom (1) below Reduction of the wall thickness is offset inwards. 2. Plastic container according to claim 1, characterized in that the starting point (15) from which the outside (14) of the long leg starts the walls (2,3,4,5) forming the J-shaped cross-section are offset towards the inside, from the bottom (1) or from a flange (16) located higher than this Has a distance that is at least equal to its distance from the underside of an upper one Connection part (8) of the J-shaped cross-section is. 3. Plastic container according to claim 1 or 2, characterized gekennaeichnet, that the length of the inwardly offset outer side area (14) of the container walls (2,3,4,5) approximately equal to half of the distance dimension between the Underside of the connecting part (8) of the J and the bottom (1) or the flange (16) is. 4. Plastic container according to one or more of claims 1 to 3, characterized in that the inwardly offset outer side area (14) is only provided in the middle area of the container walls (2,3,4,5) and the Container walls in the floor (1) or the area adjacent to the flange (16) has the same thickness as above of the starting point (1D) for the offset outer side area. Plastic container according to one or more of claims 1 to 4, characterized in that the container is provided with a compartment division (6) is.