DE102008011565B4 - Injection-molded body and injection molding apparatus and injection molding process for producing the injection-molded body - Google Patents

Abstract

Injection-molded body (1), in particular in container form, with at least one peripheral wall (10), wherein the shaped body is provided over at least a part of its peripheral wall with at least one molded-in cover element (15), wherein the at least one cover element (15) is a on or multilayer film is, characterized in that at least one positive locking element (16, 17) in the cover element (15) and / or a wall of the shaped body (1) is provided.

Description

The invention relates to an injection-molded body, in particular in container form, with at least one peripheral wall, wherein the shaped body is provided over at least a part of its peripheral wall with at least one molded-in cover element, wherein the at least one cover element is a single- or multi-layer film, an injection molding device for producing the injection molded article with at least one molded into a peripheral wall of the molding cover element, with a hollow mold and at least one insertable into the mold core, wherein between hollow mold and mold core is provided with a material meltable cavity, and an injection molding method for manufacturing of the injection-molded molding with at least one molded into a peripheral wall of the molding body cover in a mold, in which at least one mold core, leaving a cavity between the mold and mold core is inserted.

Such moldings, devices and methods for their preparation are known. For example, the DE 103 33 158 A1 a method and an apparatus for molding a container with integrated into the container wall cover element by injection molding. Here, the injection mold is fed to the cover element on an auxiliary mandrel. The injection mold is designed as a hollow mold. It is pushed over the auxiliary mandrel and transferred to the cover element electrostatically or by vacuum to the mold. Alternatively, the cover element can be applied by an applicator on the mandrel and inserted on this in the mold.

In this method, cover elements are integrated into the wall of the container. When in-mold labeling (IML), a cover element is first introduced into an injection mold, which abuts against the lateral surface before the mold is closed and the plastic melt is injected. The flowable plastic is firmly connected to the cover element by the prevailing process heat. The cover element is thereby an integral part of the injection-molded container or generally shaped body. Especially in the production of thin-walled containers, such as margarine cups, this method is used.

When injecting plastic melt between the mold cavity and mold, the problem may arise that the cover element is displaced due to the high mold filling speed with which the plastic melt is injected, and thus is no longer in the desired position on the wall of the container produced. Furthermore, due to the high mold filling speed, the cover element can fold in or cause waves when the plastic melt is injected, which can likewise lead to a qualitatively inferior surface of the finished container.

The present invention is therefore an object of the invention to provide an injection molding apparatus and an injection molding method for producing an injection-molded body, in particular in container form, and a cover member for the molding, in its application, it no longer to an unwanted misplacement of the cover element within the Mold during the injection molding process comes and thus a molded body can be produced in which the at least one cover element throws neither wrinkles nor waves and is positioned substantially at a predetermined or predetermined location of the molding.

The object is achieved for an injection-molded body according to the preamble of claim 1, characterized in that at least one positive-locking element is provided in the cover element and / or a wall of the molded body. For an injection molding apparatus according to the preamble of claim 14, the object is achieved in that the hollow mold and / or the mandrel has or have at least one protruding and / or recessed element for preventing a displacement of the cover element in at least one direction relative to the molded body. For an injection molding method according to the preamble of claim 24, the object is achieved in that during the injection of molten material into the cavity, the cover element is held on at least one protruding and / or a recessed element on the mold and / or the mandrel. Further developments of the invention are defined in the dependent claims.

Thereby, an injection-molded body is provided, which is provided with at least one cover element, which is positioned at a predetermined location of the surface of the molding. Furthermore, an injection molding apparatus is provided for producing an injection-molded article, by means of which during the molding process of the molding a securing of the cover element to the molded molding against displacement is possible. A relative movement between the cover element and the mold or mold core can be avoided. By flowing into the cavity between the mold cavity and mold core with a high mold filling material melt, in particular plastic melt, the cover element is pressed against the at least one projecting and / or recessed element, whereby the surface of forming in the cavity molding a corresponding negative form of the above and / or or recessed element occupies and holds there with this also inserted into the protruding and / or recessed element part of the cover member there. An unintentional movement of the cover element together with the inflowing molten material can be reliably prevented, since the cover element positively to the at least one projecting and / or recessed element of the mold and / or the mold core of the injection molding apparatus for producing the injection-molded body by the inflowing molten material is pressed and held. Thus, at least one positive-locking element is formed in the cover element and / or a wall of the shaped body formed on the hollow mold and / or the mold core.

The cover element is advantageously a cover element formed at least partially on the at least one projecting and / or recessed element and / or the at least one positive-locking element, so that the cover element attaches to the protruding and / or recessed element or to the interlocking element during production of the molded article can create positive locking. The formability is determined primarily by the choice of material of the cover and its thickness. In principle, it is already sufficient if the cover element is designed so as to be formable only in the region in which it should form positively on the at least one protruding and / or recessed element. Of course, it is also possible to form the cover element completely formable, so that its positioning with respect to the protruding and / or recessed element or the positive-locking element does not need to be matched to a formable region of the cover element.

The cover element is designed as a single-layer or multi-layered film. In particular, single-layer or multi-layer films may be used, which consist of plastic and / or paper and / or metal. The films used for the production of the cover element may also be uniaxially or multiaxially stretched, low-stress cast or rolled. Multilayer composite films may, for example, be composite layers of polypropylene (PP) with polyethylene terephthalate (PET) and aluminum or polyethylene (PE), ethylene-vinyl alcohol copolymer (EVOH) and polyethylene terephthalate (PET). Covering elements made of paper with integrated adhesion promoter can also be used. The choice of material / materials, the design of the film (s) and their thickness is advantageously made dependent on the effects to be achieved or properties, for. B. a desired barrier effect against migrating substances, a desired scratch resistance of a printed film, etc. It can therefore be used individually or in combination with each other films having different strength, processability, printability, etc. The thickness of the cover element can be selected application-specific and be, for example, up to 250 microns, in particular cover elements can be provided with a thickness of 40 to 250 microns or even less than 40 microns. Covering elements with a thickness of more than 250 μm can be used if they are formed so as to be formable at least partially on the at least one protruding and / or recessed element or on the molded part formed positive-locking element.

The at least one positive-locking element can be formed by a projection and / or a recess in a surface of the molded body facing the cover element and the cover element. The at least one interlocking element can also be formed by a projection and / or a recess in the cover element when engaging in a projecting and / or recessed element of an injection molding apparatus for producing the injection-molded molding. It can therefore be formed in the wall of the molding and in the cover element mating positive locking elements. Furthermore, positive locking elements can be formed only by being held in the hollow mold and / or on the mold core in the cover element.

Advantageously, the at least one positive-locking element is formed by a rib and / or groove. Alternatively or additionally, it may be formed by a punctiform depression and / or a punctiform projection. The interlocking elements can thus be formed not only by ribs and grooves, but also in addition by punctiform depressions or punctiform protruding elements, if this proves to be application-specific sense. In the case of a positive locking element in the form of a depression in the surface of the hollow mold and / or of the mold core, a part of the molten material can be pressed into this depression, so that a protruding element corresponding to the negative mold of the depression is formed on the surface of the molded injection molded body, in particular Shape of a web or a point increase relative to the surface of the formed molding.

Advantageously may be provided as a protruding element an at least partially encircling the injection-molded body annular element. The injection-molded molding may be predominantly rotationally symmetrical and the at least one positive-locking element extend circumferentially over at least part of the circumference of the molded body about its axis of rotation. When pressing the molten material into the cavity between the mold and the mold core forms the forming moldings according to an at least partially encircling annular groove or rib, via which the cover element can be held at the selected position within the mold and thus to the molded or formed moldings.

In order to allow a particularly good hold of the cover member, as already mentioned, a combination of projecting and recessed elements may be provided, such as a plurality of grooves and ribs, punctiform depressions and punctiform projections.

As a further advantage, it proves to provide the at least one positive locking element for securing the cover member on the outside and / or inside of the injection-molded body. A shaped body designed as a container can be provided both on the inside and on the outside with a respective cover element. Therefore, the securing of the cover element on both the outside and the inside of the molded body proves to be advantageous, since in each case a displacement of the cover element during the injection of the molten material can lead to a loss of quality of the finished molded body.

The at least one positive-locking element is advantageously provided proximal to the injection point of a molten material during the production of the molded article. Since the material melt flowing into the hollow space between the hollow mold and the mold core will always entrain first the part of the cover element located proximal to the injection point into the cavity, it proves to be advantageous to secure this particular part of the cover element. The at least one positive-locking element can therefore advantageously be arranged on the end of the molded body and / or the cover element, since in this area usually the injection point of the molten material is provided in the cavity. The provision of a secure hold for the cover element is therefore particularly useful at this point. If the cover element is applied only to a part of the longitudinal extent of the shaped body, the provision of the at least one projecting and / or recessed element proves to be particularly advantageous in the region of the mold and / or the mold core, in which the cover element proximal to the injection point for the molten material or is arranged in the region of a feed of the molten material into the cavity between the mold and the mold core. Advantageously, this is arranged at least one positive locking element at an axial distance from the injection point, ie in the material flow direction behind the injection point of the shaped article. With regard to the device for producing the shaped body, the projecting or recessed element on the hollow mold and / or the mold core is advantageously provided in the material flow direction behind the injection point into the cavity for the molded article to be produced.

If the injection-molded article is a cartridge, then it proves to be particularly advantageous to arrange the at least one positive locking element at a distance from a shoulder of the molded body with respect to its longitudinal direction when the cover element is arranged axially spaced therefrom. Accordingly, the protruding and / or recessed member in the injection molding apparatus for producing such an injection molded body in the form of a cartridge with respect to the direction of material flow behind a molding in the mold for forming the shoulder of the shaped body to be produced on the mold and / or the mold core intended.

Due to the axial distance in the longitudinal direction of the molded body to the injection point of this or in the material flow direction behind the injection point of the molten material in the mold cavity in the mold between the mold and the core, the cover element just where it is most exposed to the risk of unwanted dislocation held become. In the region of the shaping of the shoulder of a cartridge, the material melt is deflected from the radial to the axial direction relative to the cartridge or the cavity, so that the risk of entrainment of the cover element, which is arranged in this region with its one end, without Provision of the protruding and / or recessed element or positive-locking element by the flowing molten material is particularly high. Therefore, arranging the at least one protruding or recessed element proves to be particularly advantageous in this deflection region from the radial to the axial movement of the molten material.

Thus, if an end of the cover element in a region in which the direction of the flow of material is deflected, as arranged in the region of such a shoulder, there is the risk of entrainment of the cover element due to the mold filling speed. Therefore, arranging a positive locking element for retaining the cover element proves to be advantageous there. The protruding or recessed element is preferably provided in a cylindrical portion of the cavity and / or the mandrel or the at least one positive locking element on the finished molded body on a cylindrical portion thereof.

The axial distance to the deflection point of the material flow direction and the size of the form-locking elements can be selected application-specific.

The injection-molded body can thus be designed such that the cover element is connected to the molded body by providing at least one interlocking element protruding from the plane of the peripheral wall of the molded body. Furthermore, the cover element can be connected to the injection-molded molding by providing at least one recessing point as a positive-locking element in the circumferential wall.

For further explanation of the invention embodiments of this will be described in more detail below with reference to the drawings. These show in:

1 a perspective view of a first embodiment of an injection-molded body according to the invention,

2 a detailed perspective view of the injection-molded body according to 1 .

3 a detail sectional view through an end-side portion of the injection-molded body according to 2 .

4 a detailed sectional view through an end-side portion of an alternative embodiment of an injection-molded body according to the invention,

5 a detailed sectional view through an end-side section of a further alternative embodiment of an injection-molded molding according to the invention,

6 a perspective view of the in 5 shown details of an injection-molded molding according to the invention,

7 a partial sectional view of an injection molding apparatus according to the invention for producing an injection-molded molding according to one of 1 to 6 .

8th a side sectional view of the closed injection molding apparatus according to 7 with indicated supply of molten material, and

9 a detail sectional view through an end-side section of yet another alternative embodiment of an injection-molded body according to the invention.

1 shows a perspective view of an injection-molded body 1 , The molded body 1 has the shape of a cartridge with a cylindrical peripheral wall 10 and an end-side end wall 11 , The opposite end 12 the molded body is open, what 1 is not apparent, however 7 , Central from the end wall 11 a spout protrudes 13 which has an outside thread 14 and a Anspritzstelle 130 ,

In the production of the molding of the nozzle or this end of the molding with the injection point 130 shaped first, since there the material melt enters the mold. Such a mold 2 for manufacturing the molding is in the 7 and 8th shown in FIG 8th the entry of molten material is indicated, as will be explained in more detail below.

The molded body 1 according to 1 is outside and possibly also inside with a cover element 15 provided in the manufacture of the molding in the mold 2 and / or on a mold core 3 is added to be embedded there after the introduction of the melt into the mold on the outside and / or inside of the finished molded body there and to form the outside of the shaped body. The cover element 15 is in 1 merely hinted. The embedding of the cover element 15 in the surface of the molding can as in the DE 103 33 158 A1 disclosed done.

The molding according to 1 points near its end wall 11 Outer ribs and grooves on what better the perspective detail view in 2 and the sectional view in 3 can be removed. The ribs and grooves are formed in the surface of the molded article by protruding or recessed elements provided respectively inside the mold and / or the mandrel during the injection molding process 1 and the cover element 15 formed. Between cover element 15 and the outer surface of the peripheral wall is formed in the region of the ribs 16 and grooves 17 Thus, a positive connection, which prevents the cover element from wandering within the mold during the injection molding process and thus be misplaced. Rather, the cover element by the provision of these positive locking elements in the form of the ribs 16 and grooves 17 and the opposite formation of ribs and grooves are held.

Ribs 16 and grooves 17 in the peripheral wall 10 of the molding are how 3 can be seen, even in the cover element 15 educated. Accordingly, for forming the ribs 16 and grooves 17 in the in the 7 and 8th shown mold of an injection molding apparatus 4 for producing the injection-molded body on its inner surface 21 protruding elements 22 educated. Before filling the molten material into the mold 2 becomes the cover element 15 inserted in this. This then stores, inter alia, on the above elements 22 on the inner surface 21 the wall 20 the mold 2 , Through a channel 23 in the headboard 24 the mold 2 the material melt, in particular plastic melt, with a high mold filling speed in the cavity 25 between the wall 20 or its inner surface 21 and the mandrel 3 inside the mold 2 injected. The mold filling rate at which the molten material is injected results in the cover element 15 against the above elements 22 is pressed and thereby secured against this against accidental displacement and entrainment with the molten material. In addition, the molten material flows around the protruding elements 22 and thus forms a counter-shape to these, so that the cover element 15 still additionally from his back, on which the molten material rests, held and thus secured against moving.

Lies except on the inside surface 21 the wall 20 the mold 2 also on the outside surface 31 the wall 30 of the mold core 3 a corresponding second cover element 15 on, which is the inner surface of the molding to be formed 1 can also cover the mold core 3 corresponding holding elements, for example in the form of protruding elements 32 have, as also in 7 indicated. By the incoming melt is also the second cover element, which is the mold core 3 surrounds, against its outer surface 31 and accordingly against the above elements 32 Pressed, with the above elements 32 flowing around melted material forms a counter-shape to these and thus additionally holds the cover element by positive locking.

Like that 7 and 8th can be removed, the cover element 15 through the above elements 22 respectively. 32 with axial distance to the injection point 28 the molten material in the cavity 25 on the mold 2 or the mold core 3 held. The above elements 22 . 32 are at an axial distance - with respect to the longitudinal direction of the mold - to one, so in the material flow direction behind a molding 27 in the cavity 25 in which a shoulder 19 of the molding 1 is formed in the form of a cartridge. The shape 27 for forming the shoulder 19 is in the headboard 24 provided, like the 7 and 8th can be seen. How particularly well the finished injection molded body, as he in the 3 . 4 . 5 and 9 is shown in detail section, can be seen, is the area of the arrangement of the ribs 16 and grooves 17 or the above elements 22 . 32 in the region of the deflection of the molten material during the injection process from the radial movement in an axial, relative to the hollow mold or the cavity 25 , at the beginning of a cylindrical section 26 of the cavity 25 , In this area, there is the danger of unwanted entrainment of the cover element by the high forces acting 15 with the flowing molten material flowing through the protruding elements in the mold or on the mold core 3 and correspondingly by the resulting ribs 16 and grooves 17 is held. In particular, a rib 16 and / or a groove 17 directly axially adjacent to a constriction 190 provided the shoulder 19 from the cylindrical section 26 separates.

Basically, it is in providing a thick or stiff cover member 15 also possible that the cover element only by the inflowing molten material on the protruding elements 22 the mold or 32 of the mold core 3 is pressed, but in this case the protruding elements deform only a part of the cover element, as in 4 shown. Due to the high material thickness of the cover element finds only a very little or no shape adaptation in the region of the peripheral wall 10 of the shaped body. Only the cover element 15 is deformed accordingly. The peripheral wall 10 the injection-molded article may have little or no deformation as in 4 shown.

Are in place of the above elements 22 on the inner surface 21 the wall 20 the mold 2 and / or on the outside surface 31 the wall 30 of the mold core 3 Provided grooves, created by the peripheral wall 10 of the molding 1 in the 5 Shaping shown. Here are thin ribs 16 over the surface 18 the peripheral wall 10 in front. In a similar way, the cover element 15 pressed into the corresponding grooves in the surface of the mold or the mold core, so that the cover element 15 corresponding ribs and against moving relative to the original positioning in the mold 2 or on the mold core 3 is secured.

9 shows in principle the same design of the surface 18 the peripheral wall 10 of the molding 1 as 5 , Compared to this are the formed ribs 16 but mirror images of the ribs after 5 shaped. Ribs 16 the embodiment according to 5 have an approximately radially outwardly facing upper, ie in the direction of the shoulder 19 directed edge 160 and an oblique bottom, that is towards the end 12 of the injection-molded body 1 directed edge 161 on. Ribs 16 the embodiment according to 9 have in contrast an oblique upper edge 162 and an approximately radially outwardly facing lower edge 163 on.

Instead of providing ribs and / or grooves, other shaped elements may also be provided, such as punctiform projections and depressions on which the cover element 15 can also be maintained during injection of the molten material. In addition, a combination of ribs, grooves and punctiform projections and / or depressions is possible.

As in particular the 2 and 6 and 9 can be clearly seen, are the form-locking elements for holding the cover member 15 on the peripheral wall 10 of the molding 1 provided during the manufacturing process within the mold at the desired position in the region of the one end of the molded body, in which the first molten material is introduced, that is first made, since at this end the risk of entrainment of the cover element in injecting the molten material in the first place consists. Should the cover element 15 extend only over part of the surface of the shaped body, the interlocking elements are arranged proximal to the end of the molding body where the cover element can first be detected by the molten material, since there the risk of undesirable entrainment of the cover element 15 with the melted material.

In addition to the embodiments described above and shown in the embodiments of injection-molded articles and injection molding apparatus for manufacturing such moldings, numerous other possible in which each at least one positive locking element, a cover member against undesirable displacement relative to the molding in at least one direction during its production guaranteed. The at least one positive-locking element can still be recognized after completion of the molded body on this and / or the cover element. In an injection molding apparatus for manufacturing the injection-molded molding, at least one protruding member and / or a recessed member for providing a hold for securing the cover member in at least one direction against displacement thereof during injection of the molten material is provided.

LIST OF REFERENCE NUMBERS

1

injection-molded body

2

mold

3

mold core

4

Injection molding machine

10

peripheral

11

end wall

12

The End

13

Support

14

thread

15

cover element

16

Positive locking element, rib

17

 Positive locking element, groove

18

surface

19

shoulder

20

wall

21

palm

22

protruding element

23

channel

24

headboard

25

cavity

26

cylindrical section

27

formation

28

Injection site

30

wall

31

outer surface

32

protruding element

130

injection point

160

upper edge

161

lower edge

162

upper edge

163

lower edge

190

constriction

Claims (27)

Injection molded body ( 1 ), in particular in container form, with at least one peripheral wall ( 10 ), wherein the shaped body over at least a part of its peripheral wall with at least one molded-in cover element ( 15 ), wherein the at least one cover element ( 15 ) is a single-layer or multilayer film, characterized in that at least one positive-locking element ( 16 . 17 ) in the cover element ( 15 ) and / or a wall of the shaped body ( 1 ) is provided. Injection molded body ( 1 ) according to claim 1, characterized in that the at least one positive-locking element ( 16 . 17 ) by a projection and / or a recess in a cover element ( 15 ) facing surface of the molding ( 1 ) and the cover element ( 15 ) is formed. Injection molded body ( 1 ) according to claim 1, characterized in that the at least one interlocking element by a projection ( 16 ) and / or a recess ( 17 ) in the cover element ( 15 ) when engaging in a protruding and / or recessed element ( 22 . 32 ) a device ( 4 ) for producing the shaped body ( 1 ) is formed. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the at least one interlocking element by a rib ( 16 ) and / or groove ( 17 ) is trained. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the at least one Forming element is formed by a punctiform depression and / or a punctual projection. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the shaped body ( 1 ) is formed predominantly rotationally symmetrical and the at least one positive locking element ( 16 . 17 ) over at least a part of the circumference of the shaped body ( 1 ) extends circumferentially about its axis of rotation. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the at least one positive-locking element ( 16 . 17 ) for securing the cover element ( 15 ) on the outside and / or inside of the shaped body ( 1 ) is provided. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the at least one positive-locking element ( 16 . 17 ) proximal to the injection site ( 28 ) a molten material during the production of the shaped body ( 1 ) or at its injection point ( 130 ) is provided. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the at least one positive-locking element ( 16 . 17 ) at the end of the molding ( 1 ) and / or the cover element ( 15 ) is arranged. Injection molded body ( 1 ) according to claim 8 or 9, characterized in that the at least one positive-locking element ( 16 . 17 ) with respect to the longitudinal direction of the shaped body ( 1 ) at an axial distance to the injection point ( 130 ) is arranged at this. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the shaped body ( 1 ) is a cartridge. Injection molded body ( 1 ) according to claim 11, characterized in that the at least one positive-locking element ( 16 . 17 ) at a distance from a shoulder ( 19 ) of the shaped body ( 1 ) is arranged. Injection molded body ( 1 ) according to one of the preceding claims, characterized in that the cover element ( 15 ) has a thickness of 40 microns to 250 microns and consists of a plastic and / or paper and / or metal. Injection molding device ( 4 ) for producing an injection molded article ( 1 ), in particular according to one of the preceding claims, with at least one in a peripheral wall ( 10 ) of the shaped body ( 1 ) molded cover element ( 15 ), with a mold ( 2 ) and at least one in the mold ( 2 ) insertable mandrel ( 3 ), wherein between hollow mold ( 2 ) and mold core ( 3 ) a fillable with a molten material cavity ( 25 ), characterized in that the hollow mold ( 2 ) and / or the mandrel ( 3 ) at least one above and / or in-depth element ( 22 . 32 ) for preventing a displacement of the cover element ( 15 ) in at least one direction relative to the shaped body ( 1 ) or have. Injection molding device ( 4 ) according to claim 14, characterized in that the recessed element has a groove in the surface of the mold ( 2 ) and / or the mandrel ( 3 ). Injection molding device ( 4 ) according to claim 14, characterized in that the recessed element a punctiform depression in the surface of the mold ( 2 ) and / or the mandrel ( 3 ). Injection molding device ( 4 ) according to one of claims 14 to 16, characterized in that the projecting element is a rib-shaped element or a punctiform projection. Injection molding device ( 4 ) according to one of claims 14 to 17, characterized in that the projecting or recessed element ( 22 . 32 ) proximally or in the region of a feeder ( 23 ) of the molten material into the cavity ( 25 ) on the mold ( 2 ) and / or the mandrel ( 3 ) is provided. Injection molding device ( 4 ) according to one of claims 14 to 18, characterized in that the projecting or recessed element ( 22 . 32 ) at the end of the mold ( 2 ) and / or the mandrel ( 3 ) is provided. Injection molding device ( 4 ) according to one of claims 14 to 19, characterized in that the projecting or recessed element ( 22 . 32 ) in the material flow direction behind the injection point ( 28 ) in the cavity ( 25 ) for the shaped body to be produced ( 1 ) on the mold ( 2 ) and / or the mandrel ( 3 ) is provided. Injection molding device ( 4 ) according to one of claims 14 to 20, characterized in that the device ( 4 ) is used for producing a shaped body in the form of a cartridge. Injection molding device ( 4 ) according to one of claims 14 to 21, characterized in that the projecting or recessed element ( 22 . 32 ) in the material flow direction at a distance from a formation ( 27 ) in the mold ( 2 ) for forming a shoulder ( 19 ) of the shaped body to be produced ( 1 ) on the mold ( 2 ) and / or the mandrel ( 3 ) is provided. Injection molding device ( 4 ) according to one of claims 14 to 22, characterized in that the projecting or recessed element ( 22 . 32 ) in a cylindrical section ( 26 ) of the cavity ( 25 ) and / or the mandrel ( 3 ) is provided. Injection molding method for producing an injection-molded article ( 1 ), in particular according to one of claims 1 to 13, with at least one in a peripheral wall ( 10 ) of the shaped body ( 1 ) molded cover element ( 15 ) in a mold ( 2 ) into which at least one mandrel ( 3 ) leaving a cavity ( 25 ) between mold ( 2 ) and mold core ( 3 ) can be inserted, characterized in that during the injection of molten material into the cavity ( 25 ) the cover element ( 15 ) on at least one protruding and / or recessed element ( 22 . 32 ) on the mold ( 2 ) and / or the mandrel ( 3 ) is held. Injection molding method according to claim 24, characterized in that in the cavity ( 25 ) injected material melt the cover element ( 15 ) against the at least one protruding and / or recessed element ( 22 . 32 ) presses. Injection molding method according to claim 24 or 25, characterized in that at least one interlocking element ( 16 . 17 ) in the cover element ( 15 ) and / or one on the mold ( 2 ) and / or the mandrel ( 3 ) formed wall of the shaped body ( 1 ) is formed. Injection molding method according to claim 24, 25 or 26, characterized in that the cover element ( 15 ) by the at least one protruding element and / or the at least one recessed element ( 22 . 32 ) in the material flow direction behind the injection point ( 28 ) of the molten material into the cavity ( 25 ) on the mold ( 2 ) and / or the mandrel ( 3 ) is held.

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