WO2015074909A1

WO2015074909A1 - Container having a back-molded label, and method for the production thereof

Info

Publication number: WO2015074909A1
Application number: PCT/EP2014/074176
Authority: WO
Inventors: Matthias Schneider
Original assignee: Sanner Gmbh
Priority date: 2013-11-22
Filing date: 2014-11-10
Publication date: 2015-05-28
Also published as: EP3071387A1; DE102013112945A1

Abstract

The invention relates to a container having a container body (2) made of plastic, which has a container wall (3), wherein the container wall (3) has a first container wall section (4) and a second container wall section (7), wherein the first container wall section (4) has a label (5), wherein the container body (2) is an injection molded part made of plastic, which is produced by using an injection mold, wherein container body (2) and label (5) are connected in that, during the production of the container body (2), the label (5) is laid in the injection mold and the plastic is then injected into the injection mold, wherein the container wall has a connecting area (11) which connects the first and the second container wall section (4, 7). The invention is characterized in that the external contour of the connecting area (11) has sections (13, 13') which are arranged along a free-form line.

Description

Patent application

CONTAINER WITH REINFORCED LABEL AND METHOD FOR THE PRODUCTION THEREOF

The present invention relates to a container having a container body made of plastic, which has a container wall, wherein the container wall has a first container wall portion and a second

Container wall portion, wherein the first

Container wall section is provided with a label, wherein the

Container body is a plastic injection molded part, which is produced using an injection mold, wherein the container body and label are characterized in that in the manufacture of the container body, the label inserted into the injection mold and then the plastic are injected into the injection mold, wherein the container wall a

Has connecting region, the first and the second

Container wall section connects. The invention further relates to a method for manufacturing a container having a container body with a container wall, wherein the container wall has a first container wall portion and a second container wall portion, wherein the container body is produced by injection molding using an injection mold and thereby provided with the label, wherein the label is joined to the container body by placing the label in the injection mold and subsequently injecting the plastic into the injection mold, the container wall having a connection portion connecting the first and second container wall portions.

The production of a container in which a label is inserted into an injection mold and subsequently the plastic is injected into the injection mold is also known as in-mold or in-mold labeling designated. Advantage of this method is that the label can be prepared separately in advance, for example by way of printing. This allows a versatile and attractive design of the label. The label can also fulfill a technical function and contribute, for example, to gas tightness.

The production of containers in the in-mold process has special

Problems on. In particular, the injection process is to be designed so that the plastic material does not move the inserted into the injection mold label and no plastic material reaches the outside of the label. The manufacturing problems are more pronounced when the containers are small.

The in-mold labeling of containers is known, for example, from DE 10 2005 037 274 A1, which describes a cylindrical container produced by an in-mold process. DE 10 2005 037 274 A1 addresses the problem that the production of small diameter cylindrical moldings by in-mold labeling poses problems. DE 10 2005 037 274 A1 attempts to remedy this by using a molding tool which has a radius of at most 3.0 mm between a lateral surface and a base surface of a molding space.

Another container which is produced in the in-mold process, it is apparent from WO 2009/062632 A1. Here it is provided that connects to the outer edge of a bottom portion of a cone shape whose larger diameter is connected via a radial flange in the region of the bottom-side end edge with the inner surface of the container. As a result, the liquid plastic during injection molding to flow through the cone in the radial flange, where it meets the label.

As a result of the aforementioned measures, the problems associated with in-mold labeling are insufficiently solved. Especially with smaller containers There are problems with the manufacture, which can cause plastic to get on the outside of the label.

The present invention therefore has the object to improve the production in particular of a container with small dimensions.

The object is achieved in a container having the features of claim 1 and in a method having the features of claim 13. Accordingly, it is provided in a container and method mentioned above that the outer contour of the connection region has sections which are arranged along a free-form line. It has been found in practice that this design contributes to a better filling behavior of the injection mold. The safety of the process can be improved, and the risk of liquid plastic reaching the outside of the label during the injection molding process is reduced. Apparently, the provision of an outer contour, which is arranged along a free-form line, helps to improve the flow behavior of the plastic in the injection molding in such a way that the difficulties encountered in the in-mold process are avoided and in particular no plastic undesirable on the outside of the Label arrives. A free-form line denotes a line with continuously changing tangent slope.

According to an advantageous embodiment of the invention, it is provided that the sections of the connection region arranged along a free-form line are curved. This results in a particularly good filling behavior of

Injection mold achieved during injection molding. A further improvement is achieved when the sections are curved in such a way that the outer contour of the connection area itself is delimited by a free-form line at least in one area.

According to a further embodiment, it is provided that the sections of the connection region arranged along a free-form line have straight surfaces. Even with such a design in which the straight Surfaces arranged along the freeform surface can be a good one

Fill behavior can be achieved during the injection molding process. Particularly advantageously, the straight surfaces may be formed as facets.

A further improvement of the production is achieved if between the first container wall portion and the connecting portion a shoulder is formed, which is formed by a arranged on an outer side of the container body thickening of the container wall. Such a trained paragraph helps to improve the filling behavior in injection molding and supports the positioning of the label. According to an advantageous development of this embodiment it is provided that the paragraph is connected via an undercut with the connection area.

This positively influences the filling behavior during the injection molding process and helps to prevent plastic from getting on the outside of the label.

It is advantageously provided that the connection region and / or the first container wall section is rotationally symmetrical.

Furthermore, in an advantageous embodiment it can be provided that the first container wall section forms a container sidewall and the second container wall section forms a container bottom. A particularly good filling behavior in injection molding is achieved when the outer contour of the connecting region merges tangentially into the container bottom.

Alternatively it can be provided that the outer contour between the

Connecting portion and the container bottom forms an edge. One

Connecting region having portions arranged along a free-form line results in combination with the feature that between an edge is provided in the connection region and the container bottom, for a high process reliability during the injection molding process.

The container according to the invention advantageously has a diameter of the container body which is between 15 mm and 60 mm.

In addition, the container may be provided with a container closure. This can be designed in particular as a plug. Other objects, features, advantages and applications of the present invention will become apparent from the following description of embodiments with reference to the drawings. All described and / or illustrated features alone or in any meaningful combination form the subject matter of the invention, regardless of the summary in individual claims or their relationships.

Show it

Fig. 1 a is a perspective view of an inventive

Container according to a first embodiment;

Figure 1 b, the container of Figure 1 a in a side view.

Fig. 1 c, the container of Figure 1 b in a sectional view along the

Line A-A;

Fig. 1 d is an enlarged view of the connecting portion of

Container of Figure 1 c;

Fig. 2a is a sectional view through a container after a second

embodiment; an enlarged view of the connecting portion of Figure 2a;

Fig. 3a is a sectional view through a container after a third

embodiment;

3b is an enlarged view of the connecting portion of FIG

3a; Fig. 4a is a sectional view through a container according to a fourth

embodiment;

4b is an enlarged view of the connecting portion of FIG

4a.

Figures 1 a to 1 d show a container 1 with a container body 2 made of plastic. Figure 1 a shows the container body 2 in a perspective view from below. Here it is clearly visible that the container body 2 a

Container wall 3 has. A first container wall section 4 is provided with a label 5. The first container wall section 4 forms a container sidewall 6.

The container wall 3 also forms a second

Container wall section 7. In the illustrated embodiment, the second container wall section 7 forms a container bottom 8.

The container body 2 has at its the container bottom. 8

opposite end to an opening 9. Through the opening 9 a packaged goods can be filled into the container 1 and removed again. The container 1 is particularly suitable for tablets (not shown).

The container body 2 has an elongated shape. In addition, the container body 2 is tubular, with one end of the tube is closed by the container bottom 8. In the illustrated

Embodiment, the container body 2 has a cylindrical shape.

The opening 9 can be closed by a cover, not shown, which can be designed in particular as a plug. On the outside of the container wall 3, a bead 10 is formed, which extends around the opening 9. The bead 10 serves to engage behind a tamper-evident seal formed on the lid. The container body 2 is formed as an injection molded part made of plastic, which is made using an injection mold. The illustrated container 1 is produced in the in-mold process. Here, the pre-fabricated label is inserted into the injection mold and then injected the softened plastic into the injection mold to the

Form container wall 3.

The container body 2 has a connecting portion 11 between the first container wall portion 4 and the second container wall portion 7. The connection area 1 1 is shown enlarged in FIG. 1 d. The outer contour 12 of the connecting region 1 1 has sections 13 which are arranged along a free-form line. In the exemplary embodiment illustrated in FIGS. 1 a and 1 d, the sections of the FIGS

Outer contour of the connecting portion 1 1 curved in such a way that the outer contour 12 itself is limited by a free-form line.

The figures also show that the container bottom 8 has an inwardly drawn portion 14.

While the outer contour 12 of the connecting portion 1 1 in a direction from the first container wall portion 4 to the second

Container wall section 7 forms a free-form line is the

Connecting portion 1 1 rotationally symmetric in the circumferential direction educated. Also, the first container wall section 4 is

formed rotationally symmetrical.

FIG. 1 d furthermore shows that the outer contour 12 of the

Connecting region 1 1 tangentially merges into the container bottom 8.

The figures also show that between the first

Container wall section 4 and the connecting portion 1 1 a shoulder 15 is formed. The shoulder 15 is arranged in the illustrated embodiment by an outer side of the container body 2

Thickening of the container wall 3 is formed.

Figures 2a to 4c show three further embodiments of the invention. Insofar as there are matches, the description relating to FIGS. 1 a to 1 d applies accordingly. Parts of the same functions are provided with the same reference numerals.

The embodiment shown in FIGS. 2a and 2b differs from the embodiment shown in FIGS. 1a to 1d in that the outside of the connection region 11 has sections 13 'which are straight surfaces. The sections 13 'of the outer contour 12 are arranged along an imaginary free-form line. The just trained

Sections 13 'form facets. In the exemplary embodiment illustrated in FIGS. 3 a and 3 b, the outer contour 12 of the connecting region 1 1 has the shape of a free-form line. The embodiment largely corresponds to that which is described in Figures 1 a to 1 d. Unlike in FIGS. 1 a to 1 d, the connection region 11 does not pass tangentially into the container bottom 8. Rather, as can be clearly seen in particular in Figure 3b, between the

Connecting region 1 1 and the container bottom 8 an edge 16 is formed. The embodiment illustrated in FIGS. 4a and 4b corresponds in turn to a large extent to the embodiment shown in FIGS. 1a to 1d. Unlike in Figures 1 a to 1 d is an undercut 17 is provided between the shoulder 15 and the connecting portion 1 1.

The illustrated plastic containers are suitable for packaging different products. They are particularly suitable for the

Packaging of tablets, such as effervescent tablets. Of the

Diameter of the container body 2 is preferably between 15 mm and 60 mm, in particular between 20 and 30 mm.

Claims

Container with a container body

(2) made of plastic, the one

Has container wall (3), wherein the container wall

(3) a first container wall section (4) and a second

Container wall section (7), the first

Container wall section

(4) is provided with a label (5), the container body (2) being an injection molded part made of plastic, which is produced using an injection mold, the container body (2) and label (5) being connected during manufacture of the container body (2), the label is inserted into the injection mold and the plastic is then injected into the injection mold, the container wall (3) having a connecting region (1 1) which connects the first and second container wall sections (4, 7), characterized in that the outer contour (12) of the connection area (1 1) has sections (13, 13 ') which are arranged along a free-form line.

Container according to claim 1, characterized in that the sections (13) arranged along a free-form line

Connection area (1 1) are curved.

Container according to claim 2, characterized in that the sections (13) are curved such that the outer contour (12) of the

Connection area (1 1) is limited at least in one area by a free-form line.

Container according to claim 1, characterized in that the sections (13 ') arranged along a free-form line

Connection area (1 1) have straight surfaces.

5. Container according to one of claims 1 to 4, characterized in that a shoulder (15) is formed between the first container wall section (4) and the connecting area (1 1), which is formed by a thickening arranged on an outside of the container body (2). the container wall (3) is formed.

6. Container according to claim 5, characterized in that the shoulder (15) is connected to the connecting area (1 1) via an undercut (17).

7. Container according to one of claims 1 to 6, characterized in that the connection area (1 1) and / or the first

Container wall section (4) is designed to be rotationally symmetrical.

8. Container according to one of claims 1 to 7, characterized in that the first container wall section (4) forms a container side wall and the second container wall section (7) forms a container bottom.

9. Container according to one of claims 1 to 8, characterized in that the outer contour (12) of the connecting area (1 1) merges tangentially into the container base (8).

10. Container according to one of claims 1 to 8, characterized in that the outer contour (12) forms an edge (16) between the connecting area (1 1) and the container base (8).

1 1 . Container according to one of claims 1 to 10, characterized in that the diameter of the container body (2) is between 15 mm and 60 mm.

12. Container according to one of claims 1 to 1 1, characterized in that the container (1) is provided with a container closure. Method for producing a container (1) which has a container body

(2) with a container wall (3), the container wall

(3) has a first container wall section (4) and a second container wall section (7), the container body (2) being produced by injection molding using an injection mold and thereby being provided with the label, the label (5) being connected to the container body by inserting the label (5) into the

Injection mold is inserted and the plastic is then injected into the injection mold, the container wall (3) having a connection area which connects the first and second

Container wall section connects, characterized in that the outer contour of the connection area has sections which are arranged along a free-form line.