DE10001332A1 - Device and method for manufacturing hoses - Google Patents

Abstract

The invention relates to a device and a method for producing tubes from a thermoplastic synthetic material, a material containing a thermoplastic, or a composite material with a thermoplastic coating, whose sides are welded together along a longitudinal seam. According to the invention, a pulling system is used to lay a planar tube material around a hollow fill-profile (5) with the help of a moulding slot or a moulding ring and said material is transported to a welding device (1) located on the hollow fill-profile (5). The invention aims to provide a simply constructed device which increases the speed of production whilst maintaining a sufficiently high quality. To this end, the welding device (1) consists of a heating strip (2) which is aligned parallel to the direction of transport of the tube material. Said strip is flat and level in the contact zone of the edges which are to be welded. The heating strip (2) consists of an electrically conductive material and is connected to an adjustable electric energy supply.

Description

The invention relates to a device and a Process for the production of hoses according to the Preambles of claims 1 and 18. It can be used for various applications, such as B. in Ver packaging technology, textile and plastics technology and especially for the production of hose bags be used. For the latter application can a device according to the invention also as Tubular bag form, fill and seal machine be trained if appropriate additional Machine components for molding, filling and packing close of Schläu manufactured according to the invention Chen used or a conventional Tubular bag machine equipped accordingly becomes.

As a rule, a device according to the invention and a corresponding procedure is more likely to be continued ier operated, but it can also be used for intermittent manufacturing processes.

According to the prior art, a suitable end gear in rolled form, as a web in shape of a corresponding preliminary product. For the Manufacture of tubes or tubular bags must sen two opposite edges of one  By means of a welding or sealing process other connected, so that a dense and firm longitudinal can be obtained as a connection.

For example, in DE 197 43 158 A1 Tube forming device in a tubular pouch described. For the production of the longitudinal seam such a hose or such a hose bag is the so-called packaging tape around Form pipe placed and trans along its surface ported, opposite edge areas of a such packaging tape inside against inside be placed, and with a radiator, in which a electrical resistance wire, which is formed in a U-shape det and between two thin heat-resistant strips fen is arranged with a low coefficient of friction, the edge area in which at least one sealing compound is present is heated. So you can get a tight longitudinal seam be made while the packaging continues to trans is ported.

Such a radiator is said to be there a lesson, at least between two connecting edges are arranged, being in be preferred embodiments, however, also on the outside on the two edges additional out accordingly formed radiators should be used to for making such a connection to enter such thermal energy.

With such a radiator, however, although a relatively high manufacturing cost for this is necessary, especially with high feed rates speeds of the packaging in the Time available, not easily the  required temperatures to be reached secure connection for the production of the longitudinal seam to reach.

Furthermore, this solution is only for training so-called "fin seams" suitable and other seam shape how overlap and fold seams can cannot be easily produced.

It is also used for making the connection in Edge area a pressure of two against each other overlying pages absolutely necessary so that an increased effort is also recorded here.

It is known that such machines also get tall Trigger system requirements for the Transport of the respective packaging material used the, because even the smallest angle or Speed deviations are extremely disadvantageous act and lead to rejects.

Conventional machines mostly use fume cupboards, which are diametrically opposed and the welding equipment that is otherwise required tion is then usually at an angle of 90 ° in Relation to the two arranged opposite each other deduction systems. As a result of the pack packaging loads occurring during medium transport there may be quality defects when joining the edges come.

Feed speeds can be achieved with conventional machines capacities for packaging up to 0.5 m / s, if sufficient adequate quality of the required seam formation, he be enough so that the productivity of such  Machine is limited accordingly.

It is therefore an object of the invention to provide a device and propose a procedure that is simple Build up a significant increase in manufacturing ge dizziness, with sufficient quality at the same time activity enables.

According to the invention, this object is achieved with the features of claim 1 for a device according to the invention and the features of claim 22 for a correspond Process solved. Advantageous design tion forms and developments of the invention, erge deal with those in the subordinate claims mentioned features.

With the device according to the invention, the ver various starting materials, for example thermoplastic, one such Plastic containing material or a ver bundle material with a thermoplastic Be layering, at least in the ver welding edge areas, is coated be set. The coating can also be a lamination applied with another material. With such a thermoplastic plastic can z. B. polyethylene, but also other art trade substances. The material can also correspond be woven or knitted fabric.

The starting material can, as already with the Be Description of the state of the art, like a common one Packaging materials are trained and used so that it using a trigger system using a Filling hollow profile through which in the case of manufacture  of tubular bags also the filling material at the same time can be guided, laid and one at one such filling hollow profile arranged Schweichrich tion can be transported.

In contrast to the known prior art a very simple and very easy to use Welding device that is able to a sufficiently high heat in a relatively short time the edges of the used hose material or packaging reach so that the feed speed up can be increased to four times without quality to have to accept losses.

The essential components of such a sweat device, are a heating bar, at least in a contact area made of an electrically conductive Material, preferably a NiCr alloy. The contact area of this heating strip is par allel for the transport direction of the hose material or packaging and also parallel to the longitudinal axis the filling hollow profile aligned and arranged so that he is to be welded together by both Edges is included. The flat and flat out therefore formed contact area of the heating bar almost all over with its total effective Heating surface directly on the surfaces of the other edges to be welded. For compensation the thermal expansion should pull on the heating bar forces act, at least their contact area tension and avoid bulging. For the Erwär The heating strip is an adjustable electronic Power supply available on the front and back lower ends of the heating bar, in relation to the  Direction of transport of the hose material or pack is connected to the heating bar.

In these areas there is a connection on the heating bar areas formed on one side, laterally are pulled out so they prefer to a swivel or displacement device by means of these connection areas can be attached. For Avoid excessive heating of this type final areas, these are widened, with a formed correspondingly larger area so that these connection areas only heat up slightly men, whereas the contact area of the heating bar a sufficiently high for welding the edges Temperature can reach.

The contact area can use a friction reducing and the adherence of plastic reducing Be stratification, e.g. B. PTFE coated.

For the regulation of the temperature, which corresponds to the respective hose material or packaging can be of different sizes is adjustable Electrical power supply a voltage and current thickness measuring device available, with their measured values the respective temperature-dependent resistance is determined and as a control variable for the control of the middle one Temperature on the heating bar can be used.

The length of the heating bar can be based on the electrical power, taking into account the hose material used and the respective or the maximum feed rate at which this is transported during welding, abge be true.  

But it can also be a universally trained Heizlei should be used with a constant length, but are contacted at different intervals, so that through appropriate electrical circuit that effective heated length of such a heating strip ent can be selected speaking.

However, it has been shown that the length of the Heizlei can range from 150 to approx. 200 mm sufficiently high production speeds to rea lize.

To weld the edges of the material, it is advantageous one at least on one side, one exerting pressure Pressure device to use, which also against the Heating strip works, so that even in the heating phase an inni of the edges to be welded together eng contact of the surfaces with the heating strip in their contact area with the respective, against overlying surfaces of the ver secure welding edges. Such a mecha niche acting pressure device, can be opposite knew solutions without additional heating be set because the heating by means of a heating bar is sufficient in the contact area.

Such a pressing device should not only exert pressure in the area of the heating strip, son seen in the direction of transport, also beyond act outgoing, so that the at least up thermoplastic heated to a plasticizing temperature Plastic or sealing compound can be welded. So can a pressure device consist of two parts and one part compressive force kung at least on part of the surface of each other  edges to be welded, in the contact area the heating bar and a second part afterwards, be exercised.

So the first part can mechanically in immediate Contact work and the second part contactless pressure forces via a pressure cushion of a compressed air system, with preferably cold air to ver to each other Apply welding, preheated edges.

This is advantageous for the transport of the Hose material or packaging used deduction system, from diametrically opposite on Filling hollow profile arranged belt drives, the be particularly preferred, also with vacuum support operated, formed.

In contrast to conventional fume cupboards, ei ner of the two belt drives on the same side arranged on which also the welding device is ordered. This is the belt drive as two-part double belt drive and the Heating strip between the two straps of this double belt drive arranged and parallel to their Longitudinal axis and parallel to the direction of transport directed.

It is to avoid speed differences advantageous, both double straps by means of a common same drive to move at the same speed. Also the one located opposite one another simple belt drive should rotate accordingly chron, driven at the same speed for what conventional electronic controls can be used.  

It is also desirable that the effective The areas of the two belt drives are the same. there is under effective area, the total area of each individual belts to understand that in immediate Contact with the hose material or packaging stands. That means that the effective area of the two individual belts of the double belt drive in Sum of the effective area of the opposite orderly simple belt drive corresponds.

The filling profile used can differ in most geometric shapes, it however, at least the area of the surface should of such a hollow filling profile, which with the belt of the individual belt drives comes into contact as flat surface formed between the contact surfaces belt and hose material or packaging increase and thus slip when transporting the Hose material or the packaging material as far as possible to avoid and the highest possible forces for the trans port.

The already mentioned pressing device can be used in ver be of various shapes, two essential cases can be distinguished.

On the one hand, this is a pressing device gene, which directly on the seams to be welded the and the heating strip act, d. H. with these in Are in contact. This can be, for. B. a pressurized bar act at for example hydraulically or pneumatically is moved and the pressure is reached.

But it can also be a series arrangement of several in a row  arranged roles or umlau fendes tape can be used, especially at such a circulating volume Pressure force, e.g. B. by an increased gas pressure in Inside an appropriate encapsulation or under Use a combination with a circulating belt Use a row arrangement of several rolls or rollers are cash.

The second alternative is to apply pressure, which takes place without contact, the pressure forces with means of a compressed air cushion between the pressure direction and the rän to be welded together and the heating bar with a predeterminable distance is being used.

Such a pressing device can consist of a carrier for an air nozzle system connected to a compressed air supply supply or fan can be connected become. The carrier is then out with its air white in the direction of the heating strip send, parallel to this and in a certain ab stood, which is big enough so that no direct ter contact, even with the different thicknesses of the Hose material or packaging material occurs, arranged net and attached accordingly. The air outlet Such an air nozzle system should be used the entire surface of the carrier is evenly arranged be and have the same diameter to a poss as uniform pressure force over the entire area to secure the weld seam to be produced. The Air outlet holes formed in the carrier are in relation to the transport direction of the Hose material or packaging at an angle between 0 ° (orthogonal) and 45 ° inclined  his. Advantageously, a slope win angle of the air outlet holes can be selected, the the airflow accordingly in the transport direction tends to the surface of one of the two other edges to be welded.

The thickness of the heating bar should at least be in contact area kept constant over its entire length be and also the dimension of 0.8 mm step, preferably below 0.5 mm, around the Path difference between the two to be welded together to keep the edges as small as possible. The Width of the heating strip in the contact area should be at least at least as big as the width of the weld.

Since the temperature in relation to the transport direction in the rear area (the inlet area) of the heating bar, due to cooling by the corresponding transpor tied tubing or packaging more normal as smaller than in the front part of the heating bar is, it can be advantageous to adjust the width of the heater bar continuously increasing from back to front ßern, so that due to resistance in the back higher part of the heating bar higher temperatures are more accessible than in the front part. In another Alternatively, in the contact area of the heating bar, openings in the rear are also formed det be. Different can be used for the breakthroughs geometric shapes such as B. wedges, longitudinal grooves, Boh applications.

In the manufacture of hoses or hose bags can be moved so that the hose mat rial or the packaging in shape and in particular the edges to be welded together  positioned in the welding device and off be judged.

Then the heating bar can be swiveled or Sliding mechanism with its contact area between the two ranks to be welded together who moves, then an electrical voltage to the Heating bar created and this at least until Er range of the melting temperature of the respective thermo plastic are heated. Then be the trigger system drives are switched on and simultaneously by means of a pressure device forces on those heated by the heating bar edges to be welded together, at least from one side exercised to, as already explained, ei intimate contact of the edges with the surfaces to secure the heating bar and the pressure force effect also seen over the end in the direction of transport, the Heating strip to be welded together exercising edges.

The average temperature of the heating bar in the contact area becomes rich through the determination of the electrical Wi that is approximately linear in the control range changes by means of the measured electrical span voltage and current are regulated. For the brisk a corresponding electronically controlled Transformer used.

The device according to the invention is, preferably with operated at a low voltage up to a maximum of 24 V, so that no increased security requirements must be hit. The regulation of the middle Temperature of the heating bar is about changing the Voltage achieved according to the leading edge principle,  whereby maximum powers of 2000 W are reached can.

Introducing the contact area of the heating bar between the two to be welded together Edges can be pressed with a pressure device exerted pressure and with a pressure air cushion between the pressure device and to at least one surface of one of the two together to be welded edges is formed are supported, for example, via bypass an ejector to the compressed air system is closed with the inside of the pressure direction a negative pressure compared to the ambient pressure can be generated so that the gap between the enlarge both edges to be welded together can be edited.

After reaching the for welding the rän the required temperature will be the pressure direction switched again and compressed air through in Carrier of the pressing device trained air tread holes on the surface of the at least egg NEN edge to be welded.

This compressed air system can be used in a warm and in a cold air system can be divided. Through the in rear part (inlet area), in relation to the trans seen port direction, arranged warm air system is heated compressed air, which is at temperatures between 50 ° C and 80 ° C can be kept on the surface of the edge, in the contact area of the heating bar tet. The cold air system is preferred over the Area beyond the heating strip for seam production arranged.  

The contact area of the heating bar is, at least in Seam center area of the connecting seam to be formed to arrange.

With the solution according to the invention can without wide res, both overlap and fold seams be put. But there is also the possibility ability to form fin seams, but in the sem case the pressure device out more complicated must be formed, since the necessary pressure forces from two opposite sides, on one like this seam to be trained must be applied.

Because the heating of the welded together Edges are made right where they are needed is, the heat losses are very small, so the Heating rate correspondingly large and also a high degree of efficiency can be achieved.

With the solution according to the invention can also otherwise most difficult to process hose materials or Packaging, such as paper / wax / PE composites without further processed.

In the event of changes, i. H. when changing the different Materials and formats are necessary for this changeover times and corresponding adaptation measures almost neglected and do not represent Problem because a corresponding compensation by appropriate temperature control and adjustment of acting pressure forces alone is sufficient.

If a pressure device with which the required Chen pressure forces via a trained air cushion can be applied, is a very  uniform distribution of the pressure forces over the ge entire corresponding area possible. An adjustment to different material or packaging thicknesses easily possible and a change in Ab is in such a pressing device in usually not necessary because of a corresponding Adjustment easily through the regulation of the air pressure is possible.

The fact that the pressure forces contact us less friction forces that are seen with conventional solutions must be taken into account. It also becomes one Adhesion of plastic, especially when used of hose material or packaging material, which consists of a Monomaterial exists on the surface of such Pressing device prevented.

Due to the one-sided design of the trigger system in The hose can form a double belt drive material or packaging sections in the seam area, due to reduced stresses and strains, in ver equal to conventional solutions, who stabilizes the. It is also advantageous that the belt drives of such a trigger system in relation to welding Direction are arranged accordingly and so the poss there is the necessary pressure forces on the edges to be welded together to align and the surface of the filling hollow profile as Abutment can serve. With such an arrangement can be a uniformly good seam quality regardless can be achieved by the size of the filling hollow profile.

The device of the invention can not only ver tical, but also horizontally, with appropriate  Direction of transport along the surface of the filling hollow profile are formed, and so on different their locations are adapted.

In the following, the invention is to be explained with reference to tion examples are explained in more detail.

Show:

Figure 1 shows the formation of a heating strip in two views, which can be used on a device according to the invention.

Figure 2 shows part of an example of an inventive device with a double belt drive, a heating bar and a pressing device.

Fig. 3 is a plan view of an example of an inventive device and

Fig. 4 is a view of a pressing device with compressed air effect.

Fig. 1 shows an example of the formation of a heating strip 2 , as it can be used on a device according to the invention. The Heizlei ste 2 consists of a NiCr heating conductor alloy. This is followed by a flat planar contact area 2 'at the two respective outer ends laterally outwardly drawn connection areas 2 ", which represent a larger area compared to the contact area 2 ' and consequently significantly less when applying an electrical voltage via the connections 11 are heated than is the case in the contact area 2 ', which forms the heating zone.

In Fig. 1 is also a broken line 12 a bracket 12 for the heating bar 2 , which consists of an electrically insulating material, Darge provides.

In the example presented here, the contact area 2 'has a width which corresponds to the width of the weld seam to be targeted.

In addition, there are 2 connection points 10 on the heating strip, at which the respective electrical voltage to be measured can be tapped in order to implement the necessary temperature control, as already explained in the general part of the description. In Fig. 2 is an arrangement consisting of egg nem double belt drive 4 , with two spaced from each other and parallel aligned belts 4 ', a two-part pressing device, consisting of a warm air system 7 ' and a cold air system 7 "and a heating strip 2 with it Connection areas shown 2 "and recognizable.

The arrow shown indicates the transport direction for the hose material or the packaging. So well the contact area 2 'of the heating bar 2 , the two-part pressing device 7 ' and 7 "and the two drive belts 4 'are aligned parallel to the transport direction.

In the example shown here, the contact area 2 'is arranged directly behind the warm air system 7 ', the pressing device 7 , the planar surfaces of these two elements also being parallel and preferably at a constant distance from one another.

To the hot air system 7 'then the cold closes air system 7 "on, wherein it in relation to the transport direction behind the contact portion 2' of the heating strip 2 can be arranged. However, it is also Mög friendliness, not shown here, the length of the Warm air system 7 'to reduce and to extend the effective length of the cold air system 7 "accordingly, so that a corresponding cooling by the cold air supplied already at the end of the contact area 2 ', the heating bar 2 can be reached.

Instead of the warm air system 7 ', a purely mechanical system, in which the compressive forces are applied directly, can also be used in combination with a cold air system 7 "(as shown in FIG. 2).

FIG. 3 shows a preferred arrangement of the welding device 1 and the trigger system, which is formed from the belt drives 3 and 4 , in an arrangement on a filling hollow profile 5 . Through the inside of this hollow filling profile 5 z. B. the filling of tubular bags take place, as is also the case with conventional tubular bag form, fill and seal machines.

In this example, a predominantly circular filling hollow profile was used, which is designed as a flat surface only in the areas in which the belt drives 3 and 4 and for heating the heating strip are arranged.

The double belt drive 4 is designed as in the example according to FIG. 2, the two single belts 4 'having the same width and length and being made of the same material, so that the same frictional forces can be achieved for the transport of the hose material or the packaging material. This requirement should also essentially apply to the belt drive 3 , which is arranged diametrically opposite one another.

Furthermore, an arrangement for a heating strip 2 , which is connected with a suggested swivel drive 6 , is shown in the position required for welding the edges. With such an arrangement, both overlap and fold seams can be produced.

The double arrows indicate that the belt drives 3 and 4 , as well as the Andrückein direction 7 , can be moved in the direction of the upper surface of the hollow filling profile 5 towards or away as required.

The pressing device 7 shown here can be a strip-shaped design which can be pressed flat against one surface of one edge to be welded together in the direction of the surface of the hollow filling profile 5 , which serves as an abutment, in order to Accelerate heat input via the heating bar 2 and secondly to apply the contact pressure required for welding.

The pressing device 7 can also be designed as a compressed air system, which can be formed in one or two parts (as already described).

In this case, a carrier is used on which min at least a central compressed air connection is available is, through which the compressed air is arranged through regularly nete air outlet holes in the direction of one Surface of one of the two to be welded together edges are aimed and the necessary Pressure forces by means of between the surface of the edge to be welded together and the upper surface of the carrier built pressure pad become.

In addition to the regular arrangement of the air outlet holes should also be nozzle-shaped Openings have the same free cross-sections in order an even force effect on the corresponding To achieve area.

A carrier of a pressing device, as shown in Fig. 4, but can also be separated in its interior into two parts for the formation of a warm air and a cold air system and accordingly have separate compressed air supplies. The warm air system can be fed with preheated compressed air.

Claims (30)

1. Device for the production of hoses made of a thermoplastic, a thermoplastic containing material or a composite material with a thermoplastic coating, which are welded together along a longitudinal seam and the plan re hose material by means of a trigger system to a filling hollow profile by means of a molded chess tes or form ring and is transported to a welding device arranged on the filling hollow profile, characterized in that the welding device ( 1 ) consists of a heating strip which is aligned parallel to the transport direction of the tube material and is flat and level in the contact area ( 2 ') with edges to be welded to one another ( 2 ) made of an electrically conductive material, which is arranged between the edges of the hose material to be welded to one another, and a re-controllable electrical energy supply, which is connected to the front and rear ends in the transport direction the heating bar ( 2 ) is connected. 2. Device according to claim 1, characterized in that the front and rear ends of the heating strip ( 2 ) have widened connection areas ( 2 ") which are pulled to one side, laterally outwards. 3. Apparatus according to claim 1 or 2, characterized in that a voltage and current measuring device are provided on the controllable electrical energy supply for temperature control of the heating strip ( 2 ) by means of an electronically controlled transformer. 4. Device according to one of claims 1 to 3, characterized in that the material edges to be welded together are pressed against the heating strip ( 2 ) by means of a pressing device ( 7 ) which exerts pressure force on at least one side. 5. Device according to one of claims 1 to 4, characterized in that the extraction system consists of diametrically opposite, on the filling hollow profile ( 5 ) arranged belt drives ( 3 , 4 ), with which the tube material ent transportable along the filling hollow profile surface and one the belt drives ( 4 ), designed as a two-part double belt drive and the heating bar ( 2 ) between the two belts men ( 4 ') is arranged. 6. The device according to claim 5, characterized in that the two double belts ( 4 ') are driven by a common drive at the same speed. 7. Device according to one of claims 1 to 6, characterized in that the effective surfaces of the belt drives ( 3 and 4 ) are the same. 8. Device according to one of claims 1 to 7, characterized in that the surface of the filling hollow profile ( 5 ) at least in the area of the belt drives ( 3 , 4 ), is formed as a flat surface. 9. Device according to one of claims 1 to 8, characterized in that at least the surface of the filling hollow profile ( 5 ) coming into contact with the belts of the belt drives ( 3 , 4 ) is provided with a thermally insulating and / or friction-reducing coating. 10. Device according to one of claims 1 to 9, characterized in that the pressing device is a pressurized bar, a row arrangement of several rollers or a umlau fendes band, which / at least against the parallel to the flat surface of the filling hollow profile ( 5 ) aligned heating strip ( 2 ) acts with the mutually arranged edges to be welded together. 11. The device according to claim 10, characterized in that the Andrückeinrich device also in the transport direction over the Heizlei ste ( 2 ) going beyond exerting pressure force on the edges to be welded together. 12. Device according to one of claims 1 to 11, characterized in that the pressing device ( 7 ) is the carrier of an air nozzle system which is connected to a compressed air system or fan and is arranged at a predeterminable distance from the heating strip ( 2 ). 13. The apparatus according to claim 12, characterized in that the air nozzle system as a, arranged in the transport direction at the rear, arranged hot air system ( 7 ') and in the transport direction at the front cold air system ( 7 "), is formed in two parts. 14. The apparatus of claim 12 or 13, characterized in that the air outlet holes arranged regularly and in one Angle between 45 ° and 90 ° in relation to the trans port direction are aligned. 15. Device according to one of claims 1 to 14, characterized in that the pressing device consists of a mechanically acting part and a cold air system ( 7 "). 16. Device according to one of claims 1 to 15, characterized in that the heating strip ( 2 ) at least in the contact area ( 2 ') consists of a NiCr alloy. 17. Device according to one of claims 1 to 16, characterized in that the thickness of the heating bar ( 2 ) in the contact area ( 2 ") with the edges to be welded is constant and does not exceed 0.8 mm. 18. Device according to one of claims 1 to 17, characterized in that the width of the heating strip ( 2 ) in the contact area ( 2 '), with the edges to be welded together, corresponds at least to the width of the weld seam. 19. Device according to one of claims 1 to 18, characterized in that the width of the heating strip ( 2 ) in the contact area ( 2 '), with the edges to be welded to one another, increases continuously in the transport direction, or at least in the inlet area, openings in the contact area ( 2 ') are trained. 20. Device according to one of claims 1 to 19, characterized in that the heating strip ( 2 ) is attached to a pivoting device ( 6 ). 21. Device according to one of claims 1 to 20, characterized in that the heating strip ( 2 ) for compensating for heat treatment of the contact area ( 2 ') is subjected to a tensile force. 22. A method for producing hoses from a thermoplastic, a thermoplastic containing material or a composite material with a thermoplastic coating, which are welded together along a longitudinal seam and the plan re hose material by means of a trigger system around a filling hollow profile by means of a form shoulder , a shaped shaft or a shaped ring is placed and transported to a sealing device arranged on the filling hollow profile, characterized in that a heating strip ( 2 ) with its contact area ( 2 ') moves between the edges to be welded, the hose material is moved by an electrical voltage warmed up to at least above the plasticizing temperature of the respective thermoplastic and after reaching this temperature, the tube material is transported along the surface of the filling hollow profile ( 5 ) and the heated edges with means in the loading rich of the heating strip ( 2 ) and in the direction of transport also acting pressure forces are welded together. 23. The method according to claim 22, characterized in that the electrical voltage and current measured on the heating bar ( 2 ) and the average temperature of the heating bar ( 2 ) in the contact area ( 2 ') by changing the voltage according to the phase angle principle is regulated. 24. The method according to claim 22 or 23, characterized in that a low voltage of a maximum of 24 V is applied to the heating strip ( 2 ). 25. The method according to any one of claims 22 to 24, characterized in that the compressive forces are applied mechanically at least in the contact area ( 2 ') by direct contact of a pressing device or a part of a pressing device. 26. The method according to any one of claims 22 to 23, characterized in that the compressive forces for Welding the edges using compressed air pads are applied. 27. The method according to any one of claims 22 to 26, characterized in that the compressed air in the rear in the direction of transport, directed via a two-part pressing device ( 7 ) on the edges to be welded together in the contact area ( 2 ') of the heating strip ( 2 ) is heated. 28. The method according to claim 27, characterized in that the compressed air on a temperature in the range between 50 and 80 ° C is heated. 29. The method according to any one of claims 22 to 28, characterized in that a negative pressure is applied to the pressing device ( 7 ), and then the heating strip ( 2 ) is inserted into the thus enlarged gap between the edges to be welded together. 30. Use of a device according to one of the An Proverbs 1 to 21 for the production of hose bag.