EP0653743B1 - Method for the manufacture of an isolation element - Google Patents

Description

The invention relates to a method of manufacture an insulating element, the at least one with an adhesive layer provided insulating layer, the Adhesive layer with a removable protective element layer is covered with the step of providing raw material, that of at least one insulating layer, at least an adhesive layer and one applied thereon Protective element layer exists. Furthermore, the present refers Invention on a manufactured by this method Insulating element.

Noise isolating elements come in particular in the automotive sector used to attach to the vehicle with a Adhesive layer are provided. Here is the adhesive layer provided with a removable protective element, for example can be a protective paper or a protective film. In practice, problems arise when removing the protective element on. This is due to the fact that the outer contour of the insulating element and the protective element match.

Such noise insulation elements are for example from the EP-A 0 146 521 or EP-A 0 523 429 are known. These previously known Elements or sheets have one or more insulating layers on, an outer surface with an adhesive layer is provided with a removable protective element layer is covered. For gluing the insulating element the protective element layer must be removed at the intended location , although it is usually difficult to get a first one Subtract section of the protective element layer.

In US-A 4,902,547 for the production of self-adhesive, reinforced hangers suggested by a self-adhesive Strip material, the adhesive layer with a Protective layer is covered to go out. According to this previously known First the protective layer of the process Strip material pulled off and a reinforcement tape on one glued predetermined area of the strip material and then glue the protective layer back onto the strip material, whereby it is now partly directly on the original Strip material and partly on the reinforcement tape lies on.

In order to peel off the protective element layer in case of adhesive To facilitate elements is proposed in US-A 4,524,095 the protective element layer with a predetermined breaking line to be provided by bending the element to break open brought. By choosing a suitable course of The target break line is created by flaps that after breaking open Get over the bend line and be easily gripped can. The disadvantage here is that this type of generation of pull tabs only with flexible base materials for the items is applicable. They are also training the predetermined breaking line increased accuracy requirements necessary to cut too deep and thus damage to avoid the base material.

Another approach to conveniently pulling off the protective layer (by means of loop formation) is known from DE-U-8 512 737.

In contrast, the object of the present invention therein, a generic method and a generic Propose insulating element in which the formation of a Pull tab easier and also with rigid materials is possible.

A method with the features is used to solve this problem of claim 1 proposed. In the inventive The method provides that raw material consisting of at least an insulating layer, at least one adhesive layer and a protective element layer applied thereon is made that the protective element layer in some areas Fold away from the insulating layer and the adhesive layer removed will cut the desired shape of the insulating element is, the folded protective element layer only is partially detected and a folded trigger tab is formed and that the folded trigger tab on the cut Insulating element is returned, creating a Pull tab protruding beyond the finished insulating element is formed.

The trigger tab formed by the inventive method makes it easier to pull off the protective element because the pull tab protrudes beyond the outer contour of the insulating element. With the trigger tab is a sufficiently large grip area for Removal of the protective element provided.

Advantageous embodiments of the method according to the invention are listed in the dependent claims.

The protective element layer is advantageously raised in some areas or flipped. This ensures that when punching or cutting the insulating element forming the pull tab Area of the protective element layer is not detected.

In a further embodiment it is provided that the cutting edge of the insulating element with a small distance to a crease edge the protective element layer is arranged. With dimensional accuracy the cutting tools used today is one of these Process management unproblematic. This will continue achieved that a sufficient without great expenditure of material large trigger tab can be provided.

The insulating element is advantageously a sheet metal or a film for noise isolation. Such insulation elements come in particular used in the automotive sector.

Fig. 1

eine Draufsicht auf ein erfindungsgemäßes Isolierelement mit Abzugslasche,

Fig. 2 bis 4

schematische Darstellungen zur Erläuterung des erfindungsgemäßen Herstellungsverfahrens und

Fig. 5

eine Draufsicht auf das Isolierelement gemäß Fig. 1, wobei die Abzugslasche sich noch in ihrer Abklapposition befindet.

The invention is explained in more detail below using an exemplary embodiment which is shown in a schematic manner in the drawing. Show here:

Fig. 1

2 shows a plan view of an insulating element according to the invention with a pull tab,

2 to 4

schematic representations for explaining the manufacturing method according to the invention and

Fig. 5

a plan view of the insulating member of FIG. 1, wherein the pull tab is still in its folded position.

Fig. 1 shows a plan view of an insulating element 10, which for Noise isolation in motor vehicles is used. The Insulating element 10 has an outer contour 11 which corresponds to the respective Application is adapted. Furthermore is on the insulating element 10 a recess 14 is provided.

The structural structure of the insulating element 10 is shown in FIG. 2 forth. Accordingly, the insulating element 10 consists of an insulating layer 15, for example a sheet or a film Noise isolation. The top of the insulating layer 15 is with provided with an adhesive layer 16. There is a peelable on it Protective element layer 12 applied.

1 is the removable protective element 12 still applied to the adhesive layer 16. To make things easier the removal of the protective element 12, this is with a trigger tab 13 provided. With the trigger tab 13 provided a sufficiently large grip area, so that in a simple manner the protective element 12 from the adhesive layer 16 can be deducted.

In the manufacture of the insulating element 10 is first a Raw material provided, the basic structure of Fig. 2 emerges. The raw material has an insulating element layer 15, on which an adhesive layer 16 is applied. The adhesive layer 16 has a removable protective element layer 12 provided.

Before cutting or punching the insulating element 10 in the The protective element layer 12 becomes the desired shape in some areas from the insulating layer 15 or the adhesive layer 16 away. 3, this can be done in that the Protective element layer 12 is raised in some areas. Consequently the protective element layer is approximately in some areas vertically upwards. In this way, a crease edge 17 is formed. In the folded-down area of the protective element layer 12 the adhesive layer 16 is released.

Alternatively, as can be seen from FIG. 4, the protective element layer 12 are completely thrown so that this on the Top of the non-removed areas of the protective element layer 12 rests. In this case, too, there is a crease edge 17 of the protective element layer 12.

After the protective element layer 12 is removed from the adhesive layer in some areas 16 has been removed, cutting or Stamping for the production of the insulating element 10.

Here, the cutting tool is guided so that the folded Protective element layer 12 is only partially detected.

As can be seen from Fig. 5, in the manufacture of the insulating element 10 the cutting tool in the area to be formed Trigger tab 13 aligned obliquely to the crease edge 17, so that the folded protective element layer is only partially detected. In the area of the pull tab 13, a cutting edge 19 is provided, the with a small distance to the crease edge 17 of the trigger tab 13 is arranged. In practice, the dimensional accuracy the cutting tools so precisely that this can be done easily is.

After the cutting process, the pull tab 13 is folded out of the Position transferred to the position shown in Fig. 1. Thus, the trigger tab 13 is laterally above the Cutting edge 19 over, so that a sufficiently large grip area provided for removing the protective element 12 becomes.

Claims (5)

1. A process for manufacturing an insulating element (10) which has at least one insulating layer (15) provided with an adhesive layer (16), the adhesive layer (16) being covered by a tear-off layer (12) of a protective element, having the step of providing raw material comprising at least one insulating layer (15), at least one adhesive layer (16) and a protective-element layer (12) which is applied thereto, characterized in that the protective-element layer (12) is removed in some areas by folding it back from the insulating layer (15) and the adhesive layer (16), in that the insulating element (10) is cut into the desired shape, the folded-back protective-element layer (12) being only partially included and a folded-back removal tab (13) being formed, and in that the folded-back removal tab (13) is guided back down onto the cut insulating element (10), thus forming a removal tab (13) which projects beyond the finished insulating element (10).
2. A process according to Claim 1, characterized in that the protective-element layer (12) is in some areas turned up or folded over.
3. A process according to Claim 1 or 2, characterized in that a cutting edge (19) of the insulating element (10) is arranged at a small spacing from a bending edge (17) of the protective-element layer (12).
4. A process according to one of Claims 1 to 3, characterized in that the insulating element (10) is a metal sheet or a foil for noise insulation.
5. An insulating element (10), in particular for noise insulation, having at least one adhesive layer (16) which is covered by a tear-off protective-element layer (12) constructed with a removal tab (13) which projects in some areas beyond the outer contour (11) of the insulating element (10), characterized in that, in relation to a bending edge (17) of the removal tab (13), part of the outer contour (11) of the removal tab (13) is constructed as a mirror-image of part of the outer contour (11) of the actual insulating element (10).

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