SE516972C2 - Device and method for punching out detail from treadmills and application to objects - Google Patents

Abstract

A device which comprises a movably arranged picking head (4) which is movable to a first position for picking up a component (1) from a web (2) and a second position for applying said component (1) to an object (3). The device is characterised in that the picking head (4) comprises a punching tool (6) which in said first position is adapted to engage with a material (10) for punching out said component (1), the material being arranged on said web (2), and a gripping means (8) for retaining the component (1) which is punched out in the first position. The present invention also relates to a corresponding method.

Description

l0 15 20 25 30 35 516 972 2 ject it is required that the part is retrieved from the web with high accuracy.

In this case, it is required that the details are placed on the track with the required dimensional accuracy, which in practice has proved to be difficult to achieve.

To ensure accurate retrieval of the details, it is also required that the track is correctly positioned. More specifically, the web must be positioned so that the details supported therefrom are applied to the current pick-up position with the required dimensional accuracy. Should the position deviate from the desired one, there is a risk that a part ends up wrong in the picking head and thus is incorrectly applied to the object.

For obvious reasons, this entails disposal and subsequent reworking. Even if the parts are correctly placed on the web and the web is correctly positioned, it is still difficult to pick up the details with the required accuracy, which is due to the difficulty of using the picking head to pick up each individual part from the web with the required precision. When the part is to be detached from the web, there is also always a risk that the said part may slip slightly in the picking head.

As stated above, the details may consist of seals, which are normally made of a relatively thick and elastic material. When winding a protective film carrying such details, a deformation of the same often occurs. The details can also end up “out of position” on the protective film. For obvious reasons, this means that pick-up with the required accuracy cannot be ensured, which of course has a negative effect on the mounting precision in connection with the application of the part to the object.

Thus, there is a need for a method that better ensures the required mounting precision when retrieving a part from a web and applying the part to an object. Summary of the Invention A first object of the present invention is to provide an improved device of the type initially described. In this case, the device must in particular allow the retrieval of details with high accuracy in order to ensure the required mounting precision when applying the details retrieved from the web to objects.

A second object of the present invention is to provide a corresponding method which ensures the required mounting precision.

In order to achieve the first object, in accordance with the present invention, a device with the features specified in claim 1 is provided. Preferred embodiments of the device are set out in claims 2-15.

In order to achieve the second object, in accordance with the present invention, a method with the features stated in claim 16 is provided. A preferred embodiment of the method is stated in claim 17.

More particularly, a device is provided, comprising a movably arranged picking head, which is applicable to a first position for retrieving a part from a rollable, elongate web and a second position for applying said part to an object, which device is characterized in that the picking head comprises a punching tool, which in said first position is arranged for engagement with a material arranged on said web for punching out said detail, and a gripping means for holding the part punched out in the first position.

In this way, a device is provided which allows retrieval of details from a web with high accuracy and which thus ensures the required mounting precision in the subsequent application of the details to respective objects. When retrieving a detail from the web, the part is punched out of a material arranged on a web and held in the picking head of the device by means of a gripper. The normally present problems with respect to the placement of the details on the web and the positioning of the web relative to the picking head are consequently eliminated.

It thus becomes possible by means of the device according to the invention to retrieve a detail from the web with extremely high accuracy, which of course allows high mounting precision when applying the part to the object.

As the details are punched out from a material which is arranged on a web, there is also no risk of the part being deformed or otherwise ending up "out of position" on the web in the event that it is provided in roll form.

According to a preferred embodiment of the device, the punching tool acts in said engagement for partial penetration of said material, the device further comprising a rotatable punching means, which is movable along the punching tool with the web and the material arranged thereon located between the punching tool and the punching means for penetrating the remaining part. of the material. This makes it possible to punch the material out of the web with very high accuracy without interference with the said web. When the pick head is applied to the first position, the punch tool engages the material for partial penetration. Thus, in this situation there is no risk of intervention in the track. Then the rotatable punching member is moved along the punching tool. This makes it fairly easy to control the gap formed between the punching tool and the punching member. By ensuring that this gap essentially constitutes the thickness of the web, it thus becomes possible to ensure that the punching tool does not engage in the web.

The punching tool preferably has at least one cutting edge facing the web for said engagement with the material in said first position.

The device further preferably comprises an abutment surface for controlling the engagement of the punching tool in said material. This makes it possible, for example, to ensure that the engagement of the punching tool acts for partial penetration of the material.

The gripper may comprise a suction means, a magnet means or a needle means for holding a part.

The gripper is preferably movable relative to the punching tool for applying a detail held in the same to an object. This allows easy application of the part to the object without the risk of the punching tool interfering with the application.

The picking head of the device is furthermore advantageously movable along an axis extending perpendicularly to the plane of propagation of the web. The punching tool will thus act for plane punching in the material when the picking head is applied to the first position.

According to a further preferred embodiment of the device, this comprises a dispensing tongue, over which said path runs and against which the punching tool acts in said first position. The web is preferably redirected at a front end of the dispensing tongue with respect to the running direction of the web, and advantageously has for this purpose a sharp edge portion arranged at its front end across the running direction of the web.

According to a further preferred embodiment of the device, the dispensing tongue carries a rolling member extending transversely to the running direction of the web, which is arranged to protrude to some extent from the dispensing tongue of the dispensing tongue and is arranged for co-operation with an abutment surface of the punching tool. the material.

The dispensing tongue is preferably movable in the longitudinal direction of the web between a first and a second end position, the dispensing tongue being arranged for movement relative to the web in the direction from the first to the second position and together with the web in the direction from the second to the first position. A part punched out by means of the punching tool and held by means of the gripper is advantageously detachable from the web when the picking head is arranged in said first position by moving the dispensing tongue in a direction opposite to the running direction of the web. from the first end position to the second end position. The punched part will thus be detached from the web when the dispensing tongue is moved relative to the web to the second end position. When then the dispensing tongue is moved to the first end position, which movement thus takes place together with the web, a feed of the web takes place which allows punching and retrieval of a new detail.

Preferably, the punching tool acts in said engagement for partial penetration of said material and the rolling means is arranged such that upon said movement of the dispensing tongue from the first end position to the second end position it acts as a rotatable punching means for cooperating with said punching tool for penetrating residual part of the material. This makes it possible to ensure the punching out of a part without interfering with the web on which the material is arranged.

The picking head is preferably linearly displaceable from said first position to said second position when the dispensing tongue is moved to said second end position. This allows the application of a detail to an object in a very simple manner.

Further, there is provided a method of applying a detail to an object, picking head to a retractable, elongate web comprising the steps of applying one to retrieve a detail therefrom and then applying the picking head to the object to apply the detail thereto, whichever is characterized in that the step of retrieving the part comprises the measures of punching said detail out of a material arranged on the web by means of a punching tool included in the picking head and of holding the punched part in the picking head by means of a gripper.

Preferably, the measure of punching out said detail comprises applying the punching tool perpendicular to a dispensing tongue, over which the web passes, in order to partially penetrate the material arranged on the web, and then subsequently moving the dispensing tongue into a web of the web. running direction opposite direction that a rolling member supported by the dispensing tongue cooperates with the punching tool to penetrate the remaining part of the material.

Preferred embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings.

Brief description of the drawings Figures 1a-e schematically show the sequence according to the invention for retrieving a part from a web and for applying the part to an object.

Fig. 2 shows a partially sectioned side view of a preferred embodiment of a device according to the invention, wherein a picking head is shown in an initial position and a dispensing tongue is shown in a first end position.

Fig. 3 shows a detached perspective view of a part of the picking head shown in Fig. 2.

Fig. 4 shows a partially sectioned side view of the device in Fig. 2, wherein the picking head is arranged to a retrieval position and the dispensing tongue is arranged in said first end position.

Fig. 5 shows a partially sectioned side view of the device in Fig. 2, the picking head being mounted to said retrieval position and the dispensing tongue being mounted to a second end position.

Fig. 6 is an enlarged partially sectioned partial view of the device of Fig. 2, showing a partial view of the movement of the dispensing tongue from the first end position towards the second end position.

Fig. 7 shows a partially sectioned side view of the device in Fig. 2, the picking head being applied to an application position and the dispensing tongue being applied to said second end position. Description of exemplary embodiments In Figs. 1a-e, to which reference is made, a sequence is illustrated which schematically shows the method according to the invention for retrieving a part 1 from a web 2 and for applying said detail 1 on an object 3.

For carrying out the method, a device according to the invention is used comprising a picking head 4 and a dispensing tongue 5.

The picking head 4 has a punching tool 6 with associated cutting edges 7 and a gripper 8.

A liner 9 runs over the dispensing tongue 5 and is angled at its front end away from the plane of distribution of the dispensing tongue 5.

The picking head 4 is movably arranged for movement from a starting position shown in Fig. 1a to a retrieval position shown in Fig. 1b and an application position shown in Fig. 1e.

The liner 9 is formed by a web 2 on which a material 10 is arranged. The web 2 can in this case consist of a protective foil on which a material 10 is arranged, which on its side facing the protective foil carries a coating of an adhesive material.

To retrieve a part 1, the picking head 4 is thus applied to the retrieval position shown in Fig. 1b. the cutting edges 7 of the fabric 6 will in this case intervene in the material 10 arranged on the punching web 2 for punching out a detail 1.

Thereafter, the dispensing tongue 5 is moved in a direction opposite to the running direction of the liner 9, as shown in Fig. 1c. Said movement takes place relative to the liner 9, whereby the liner 9 is kept stretched for continuous angling at the front end of the dispensing tongue 5.

The gripper 8, which acts for holding the punched part 1 in the picking head 4, ensures that the part 1 is dispensed, i.e. detached, from the web 2 when it is angled away from the distribution plane of the dispensing tongue 5.

Fig. 1d shows how a part 1 punched out of the material 10 is held in the picking head 4 while the dispensing tongue 5 has been moved to an end position next to the picking head 4.

For application of the part 1 on the object 3, the picking head 4 is moved to said application position, which is shown in Fig. 1e.

Finally, the picking head 4 is returned to the initial position and the dispensing tongue 5 is moved together with the liner 9 to the end position shown in Fig. 1a, whereby new material is arranged under the picking head 4. The device is then ready for a new cycle.

In Fig. 2, to which reference is now made, a preferred embodiment of the device according to the invention is illustrated. The device comprises, as previously described, a dispensing tongue 5 for continuous feeding of a liner 9 and a picking head 4.

The liner 9 comprises, as before, a material 10 arranged on a web 2, wherein the web 2 can be formed by a protective film, on which a material 10 provided with an adhesive coating is arranged.

The picking head 4 comprises a punching tool 6 and a gripper 8 and is shown more clearly in Fig. 3, to which reference is also made. The picking head 4 is supported by a stand (not shown) and is movably arranged for linear movement from a starting position shown in Fig. 1 to a retrieval position and to an application position.

The punching tool 6 comprises a tubular element 11 which can be given any shape. In the embodiment shown, the element 11 has a square cross section. The punching tool 6 further has two cutting edges 7 spaced apart from each other, which are arranged on the underside 12 of the element 11. The punching tool 6 can of course also have a cutting edge extending in an endless path, just as there can also be more than two cutting edges arranged on the element ll. sub-side 12. The punching tool 6 finally also comprises abutment surfaces 13, which are arranged outside the cutting edges 7 on two opposite sides of the sub-side 12 of the element 11. The gripper 8 is movably arranged inside the punching tool 6 elements 11. It is understood, however, that the gripper 8 can also be arranged externally of the punching tool 6 if desired. More specifically, the gripper 8 is linearly displaceable relative to the punching tool 6 in its longitudinal direction and can be made to protrude from the underside 12 of the element 11. One or more through-going channels 14 are accommodated in the gripper 8, which open into the underside 15 of the gripper 8.

The dispensing tongue 5 is movably arranged for movement between a first and a second end position shown in Fig. 2 and has at its front end in the running direction of the liner 9 a sharp edge portion 17, which extends across the running direction of the liner 9. The dispensing tongue 5 further supports a rolling member 16 arranged transversely to the running direction of the liner 9, which is arranged so that it protrudes to some extent from the plane of distribution of the dispensing tongue 5. The liner 9 thus runs over the dispensing tongue 5 and thereby also over the rolling member 16 and further over the edge portion 17. Liner 9 is angled more precisely from the distribution plane of the dispensing tongue 5 at said edge portion 17. The dispensing tongue 5 further comprises means not shown for feeding the web over the dispensing tongue 5. These means are arranged so that the dispensing tongue 5 moves relative to the liner 9 when the dispensing tongue 5 is moved in the direction from the first end position to the second end position and together with the liner 9 when the dispensing tongue 5 is moved in the reverse direction of the liner 9. The means for advancing the liner 9 also ensure that the liner 9 is kept stretched during the movement of the dispensing tongue 5 for continuous angling of the liner 9 at the front end of the dispensing tongue 5.

The device according to the invention is intended for automated and piecemeal retrieval of parts 1 from a web 2 and for piecemeal application of said details 1 to object 3. Each part 1 can in this case be, for example, a seal, which is to be applied to an object 2 in the form of a cover for a mobile phone. It will be appreciated, however, that the picking head may also be so designed that retrieval of more than one part is permitted for application to one or more objects.

To retrieve a part 1, the picking head 4 is moved from the initial position shown in Fig. 2 to a first position shown in Fig. 4, constituting a retrieval position. The dispensing tongue 5 is in this case arranged in its first end position.

More specifically, the picking head 4 is moved perpendicular to the plane of extension of the dispensing tongue 5, and the cutting edges 7 on the underside 12 of the punching tool 6 facing the liner 9 will thereby engage with the material 10 arranged on the web 2 of the liner 9.

When the picking head 4 is applied to said retrieval position, the roller means 16, which as previously mentioned protrudes to some extent from the expansion plane of the dispensing tongue 5, acts as an abutment for the abutment surfaces 13 of the punching tool 6. Hereby a control of the cutting edges 7 engages in said material 10. This engagement is more specifically controlled so that the cutting edges 7 only act for partial penetration of the material 10, ie the cutting edges 7 do not completely penetrate the material 10. It is understood that stops and abutment surfaces can also be arranged in other ways to achieve required control of the cutting edges' engagement in the material.

Thereafter, an air unit (not shown) is activated, which is arranged to apply a vacuum via the air duct 14 to the underside 15 of the gripper 8 for holding the punched part 1.

Finally, the dispensing tongue 5 is moved in the direction from the first end position to the second end position, which is schematically shown in Fig. 5. The rotatable roller member 16 will in this case, during said movement of the dispensing tongue 5, be moved past the cutting edges 7 while maintaining contact. with the abutment surfaces 13 of the punching tool 13. As previously mentioned, the roller member 16 to some extent protrudes from the distribution plane of the dispensing tongue 5. The roller member 16 thereby forms a rotating punch member which will co-operate with the cutting edges 7 for penetration. of the remaining part of the material 10, which is shown more clearly in Fig. 6, to which reference is now also made. The abutment surfaces 13 and the roller member 16 are in this case arranged so mutually that the engagement of the cutting edges 7 acts for penetration of the material 10 but not for cutting engagement in the web 2. More specifically, the abutment surfaces 13 and the roller member 16 are arranged so that a gap X is formed between the upper periphery of the rolling member 16 and the cutting edges 7, which gap X substantially corresponds to the thickness of the web 2.

When the dispensing tongue 5 is moved in said direction and the rolling means 16 thus ensures that the cutting edges 7 completely penetrate the material 10, a punching of a part 1 from the material 10 is effected. Said part 1 is retained in the picking head 4 by means of the gripping means 8 and underside 15 applied the vacuum. The movement of the dispensing tongue 5 in the said direction takes place relative to the liner 9. Furthermore, the liner 9 is kept stretched and angled at the sharp edge portion 17. This has the consequence that the punched part 1 is dispensed loose, i.e. detached, from the web 2 while the part 1 is held in the picking head 4. It is hereby understood that in some cases it is possible to dispense with the sharp edge portion 17 of the dispensing tongue 5 and thereby arrange the roller means 16 at the front end of the dispensing tongue 5 to allow the liner 9 to be angled over said roller means 16. it is preferred to arrange in the manner described above a sharp edge portion 17 at said front end since a more reliable breaking of the adhesive which attaches the part 1 to the web 2 is thereby obtained.

The device according to the invention allows retrieval of a part 1 from a web 2 with very high accuracy, which results from the part 1 being punched out of a material 10 and thereby being held in the punched-out position.

Thus, there is no need for positioning the web 2 and the part 1 relative to the picking head 4, nor is there any risk that the part 1 will end up "out of position" on the web 2. This risk does not even exist if the part 1 is made from a relatively thick and elastic material 10, such as foamed plastic or rubber, and not even if the liner 9 is provided in a rolled-up condition on a roll.

The punching of the part 1 takes place in two steps. In a first step, i.e. when the picking head 4 is applied to said retrieval position, an initial partial penetration of the material 10 takes place by plane punching. Thereafter, the dispensing tongue 5 is moved to the second end position, the rolling member 16 cooperating with the cutting edges 7 for penetration of the remaining part of the material 10 by the nearest punching.

It will be appreciated that it is considerably easier to control the engagement of the cutting edges 7 in the high tolerance material 10 in the second stage. During plane punching, as in the first step, the engagement of the cutting edges 7 in the material 10 takes place largely uncontrolled as a result of the simultaneous abutment of the cutting edges 7 against the material 10. Initially, the material 10 may be compressed, after which a cutting engagement can happen fairly instantaneously. This instantaneous intervention can cause uncontrollable suspension in the device, which suspension can have the consequence that the cutting edges 7 also engage in the web 2, which is disadvantageous for reasons which will be explained below. This is the reason why the engagement of the cutting edges 7 in the material 10 during the first step is arranged for only partial penetration of the material 10. In the second step the nearest punching takes place, whereby it becomes possible to ensure that the cutting edges 7 engage in the material 10 acts for complete penetration of the material 10 but not for cutting engagement in the web 2, which is achieved by means of the gap X existing between the roller means 16 and the cutting edges 7, guided by the abutment surfaces 13, which substantially corresponds to the thickness of the web 2. This is of great importance because cutting engagement in the web 2 would entail a risk of delamination of the web 2 in connection with dispensing of the part 1 from the web 2. Delamination 10 15 20 25 30 35 516 972 14 means that a part of the web 2 is torn off and remains on the underside of the part 1, which of course - if the part 1 bears an adhesive coating on its underside - makes later application of the part 1 to an object 3 impossible.

It will be appreciated that it is acceptable if the cutting edges 7 act to compress the web 2, since there is no risk of delamination in connection with dispensing. In Skäreggarnas 7 intervention in the material 10 during the said first step should correspond to a maximum of 75% of the total material thickness, but it should be understood that this ratio is only a guideline value that must be adapted to each detail type and material type. For certain materials, it may further be possible to achieve a complete punching of the part from the material already in the first step without a subsequent risk of delamination in connection with dispensing, whereby it becomes possible to dispense with the second step.

When the dispensing tongue 5 is thus applied to the second end position, the picking head 4 is moved to a second position constituting an application position, which is shown in Fig. 7. This movement takes place advantageously by linear movement to a position below the retrieval position.

In said application mode, the object 3 is arranged to which the part 1 is to be applied. The gripper 8 is hereby displaced so inside the punching tool 6 that the underside 15 of the gripper 8 projects beyond the underside 12 of the elements 11 of the punching tool 6. The part 1 can thereby be easily applied to a dedicated surface of the object 3. by means of a coating of an adhesive material arranged on the side 1 of the part 1 facing the object 3. Thereafter, the part 1 is detached from the gripper 8 by releasing the vacuum at the underside 15 of the gripper 8 and the picking head 4 is returned to the initial position.

Finally, the dispensing tongue is moved 5 aters to the first end position. This movement takes place as previously mentioned together with the liner 9, whereby feeding of the same is effected.

The device is thus ready for a repeated cycle for retrieving a new part 1 from the web 2 and applying said part 1 to a new object 3.

It will be appreciated that the present invention has been described only with reference to a non-limiting preferred embodiment.

In the preferred embodiment, the distribution plane of the dispensing tongue coincides with the horizontal plane.

However, it is quite possible to angle the spreading plane and let the punching tool follow this with a perpendicular stroke direction. Furthermore, it is also possible, for example, to allow the punching tool to act from below against the dispensing tongue.

The roller member should be made of hardened steel as this will be subject to abrasion partly by the liner fed over the roller member and partly by the friction between the same and the cutting tool's cutting edge and abutment surfaces. Furthermore, the requirements for dimensional accuracy should be set very high.

The punching tool should also be made of hardened steel to withstand wear and meet the requirements for high dimensional accuracy.

The gripping function of the gripping device can be arranged by means of a vacuum, but other possible solutions are, for example, magnetism or needles. The choice of solution is governed by the type of material to be punched.

Roller means, punching tools and grippers may be interchangeable to allow easy adjustment for handling differently designed parts.

Several modifications and variations are thus possible and the invention is thus defined exclusively by the appended claims.

Claims (17)

10 15 20 25 30 35 516 972 16 PATENT REQUIREMENTS Device, comprising a movably arranged picking head (4), which is attachable to a first position for retrieving a part (1) from a roll-up, elongate web (2) and a second position for applying said part (1) to an object (3), characterized in that the picking head (4) comprises a punching tool (6), which in said first position is arranged for engagement with a material (1) arranged on said web (2), a gripping device (8) for holding the part (1) punched in the first (10) for punching out said part and the position. The device according to claim 1, wherein the punching tool (6) in said engagement acts for partial penetration of said material (10), the device further comprising a rotatable punching member (16), which is movable along the punching tool ( 6) with the web (2) and the material (10) arranged thereon located between the punching tool (6) and the punching means (16) for penetrating the remaining part of the material (10). Device according to claim 1 or 2, in which the punching tool (6) has at least one cutting edge (7) facing the web (2) for said engagement with the material (10) in said first position. Device according to any one of the preceding claims, further comprising a stop surface (13) for controlling the engagement of the punching tool (6) in said material (10). Device according to any one of the preceding claims, (14), a magnetic means or a needle means for holding a part (1). Device according to any one of the preceding claims, in which the gripper (8) comprises a suction means in which the gripper (8) is movable relative to the punching tool (6) for applying a to the same. hold detail (1) on an object (3). Device according to one of the preceding claims, in which the picking head (4) is movable along an axis perpendicular to the plane of propagation of the web (2). Device according to any one of the preceding claims, further comprising a dispensing tongue (5), over which said web (2) runs and against which the punching tool (6) acts in said first position. Device according to claim 8, wherein said web (2) is deflected at a front end of the dispensing tongue (5) with respect to the running direction of the web (2). Device according to claim 9, in which said dispensing tongue (5) has at its front end a sharp edge portion (17) arranged transversely to the running direction of the web (2). Device according to one of Claims 8 to 10, in which the dispensing tongue (5) carries a rolling member (16) extending transversely to the running direction of the web (2), which is arranged to protrude to some extent from the plane of extension of the dispensing tongue (5) and is arranged for co-operation with an engagement of the punching tool (6) in the material (10) for guiding the abutment surface (13) of the punching tool (6). Device according to one of Claims 8 to 11, in which the dispensing tongue (5) is movable in the longitudinal direction of the web (2) between a first and a second end position, the dispensing tongue (5) being arranged to move in the direction from the first (2) in movement relative to the web (2) to the second position and together with the web direction from the second to the first position. Device according to claim 12, wherein a part (1) punched out by means of the punching tool (6) and held by the gripper (8) is arranged in said first position by being detachable from the web (2) when moving the dispensing tongue (5). ) in a direction opposite to the running direction of the track (2) from the first end position to the second end position. 10 15 20 25 30 35 516 972 18 Device according to claim 12 or 13, when said (6) during said engagement act for partial penetration of said pointer to claim 11, in which the punching tool material (10) and wherein the rolling means (16) is arranged so that in said movement of the dispensing tongue (5) from the first end position to the second end position acts as a rotatable punching means for co-operation with said punching tool (6) for penetrating the remaining part of the material (10). Device according to any one of claims 12-14, wherein the picking head (4) is linearly displaceable from said first position to said second position when the dispensing tongue (5) is moved to said second end position. A method of applying a detail (1) to an object (3), applying a picking head (4) to a stepwise extensible, elongate web (2) for retrieving a detail (1) to then applying the picking head (3). 4) to the object therefrom and (3) for applying the part (1) thereto, characterized in that the step of retrieving the part (1) comprises the measures of punching by means of a punching tool (6) included in the picking head (4). out said part (1) from a material (10) arranged on the web (2) and to hold the punched part (1) in the picking head (4) by means of a gripper (8). A method according to claim 16, wherein the step of punching out said detail (1) comprises applying the punching tool (6) perpendicular to a dispensing tongue (5), over which the web (2) runs, to partially penetrate it onto the web ( 2), and then to move the dispensing tongue (5) in a direction opposite to the running direction of the web (2) that a roller member (16) supported by the dispensing tongue (5) cooperates with the punching tool (6) for to penetrate the remaining part of the material (10).