CA2634834A1 - Use of a heating-up device and transporting and storage system for hot-melt adhesives - Google Patents
Use of a heating-up device and transporting and storage system for hot-melt adhesives Download PDFInfo
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- CA2634834A1 CA2634834A1 CA002634834A CA2634834A CA2634834A1 CA 2634834 A1 CA2634834 A1 CA 2634834A1 CA 002634834 A CA002634834 A CA 002634834A CA 2634834 A CA2634834 A CA 2634834A CA 2634834 A1 CA2634834 A1 CA 2634834A1
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- Prior art keywords
- heating
- plate
- transporting
- hot
- preceding patent
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/022—Melting the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0066—Heating materials to facilitate their unpacking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0097—Glues or adhesives, e.g. hot melts or thermofusible adhesives
Abstract
The invention relates to the use of a heated plate (7) for dissolving adhesive bonds of a packaging film (5) around a hot-melt adhesive (4) in a transporting container (1) and to a heating-up device for dissolving adhesive bonds of a packaging film (5) around a hot-melt adhesive in a transporting container, this device having a handle (9), a plate (7), with a cross section adapted to the cross section of the transporting container (1), and a heating device (12.1, 12.2, 15, 17) for the plate (7). The invention also relates to a storage and transporting system for hot-melt adhesives, comprising a film pack (5) for the hot-melt adhesive, also comprising a transporting and storage container (1) for accommodating the hot-melt adhesive (4) located in the film pack (5), and further comprising a heating-up device for dissolving adhesive bonds of the packaging film (5) around the hot-melt adhesive (4) in the transporting and storage container (1), this heating-up device at least comprising a plate (7), with a cross section adapted to the cross section of the transporting and storage container (1), and a means for generating heat (12.1, 12.2, 13, 15, 17) on the plate.
Description
USE OF A HEATING-UP DEVICE AND TRANSPORTING AND STORAGE
SYSTEM FOR HOT-MELT ADHESIVES
Technical Field The invention relates to the use of a heating-up device, to a heating-up device for dissolving bonds of a packaging film around a hot-melt adhesive in a transporting container and to a storage and transporting system for hot-melt adhesives.
Prior Art It is generally known that hot-melt adhesives (also designated as hot melts by persons skilled in the art) for industrial use are stored and transported in casks or in what is known as a Hoobock, the hot-melt adhesives being surrounded by an aluminum-coated PE bag to avoid a direct contact of the adhesive with the transporting container. Hot-melt adhesives used are, for example, reactive PUR hot melts or reactive polyolefin hot melts. To use such a hot-melt adhesive, the transporting container is opened on the top side, and the top side of the bag has to be cut off, so that the device for melting and suction-extracting the hot-melt adhesive can come directly into contact with the adhesive and the latter can be suction-extracted from the transporting container after previous heating.
One problem in this procedure is that the film bonds firmly with the cooled hot-melt adhesive and can be pulled off only with great difficulty. This is additionally made more difficult because the bag, as a rule, is not smooth along the top side, but has folds into which the hot-melt adhesive has flowed, consequently making it even more difficult to release the film. It is known, in this case, that, after the opening of the transporting container, the top side of the bag is heated by means of hot-air blowers, in order to release the film from the hot-melt adhesive, so that a "cover" of the bag can subsequently be cut out and removed. What is an additional problem in this case is that the hot-air blowers, although generating locally high heat, cannot generate any uniform heat over the entire surface of the upwardly exposed bag. This results in a relatively complicated procedure until such a transporting container can actually be employed for use in automatic machines. Furthermore, due to the local occurrence of very high temperature, thermal damage to and decomposition of the adhesive can sometimes arise.
Presentation of the Invention The object of the invention, therefore, is to find a device which simplifies the above-described procedure of releasing the film in the opening region of the container.
This object is achieved by means of the features of the independent patent claim. Advantageous developments of the invention are the subject matter of subordinate claims.
The inventors recognized that a uniform release of the film in the opening region of the transporting container by means of a heated plate is substantially simpler than the use of a hot-air blower, while the heating of such a plate, which preferably corresponds in cross section to the cross section of the transporting container, can be carried out in various ways.
According to this fundamental idea, the inventors propose the use of a heated plate for dissolving bonds of a packaging film around a hot-melt adhesive (hot melt) in a transporting container. The transporting container may in this case preferably be a cask, while the plate should preferably have a circular cross section. This plate may, for example, be led through an electrically operated resistance wire which is connected to the plate or there is the possibility of heating the plate with the aid of a gas-operated heating device.
There is also the possibility, however, of using a preheated plate. For example, preheating may take place in a type of oven, or there is also the possibility, if the plate consists essentially of metal, of transmitting the heat into the plate by means of induction currents.
If a preheated plate is used, the plate should have a heat output of between 0.2 and 2.0 KW. This heat output should in this case be calculated such that it is sufficient for its heat capacity to melt the respectively used hot-melt adhesive in the desired region, while at the same time the operating temperature of the heating plate must be selected such that no damage to the bag film used or to the adhesive occurs.
The plate may additionally be provided on the top side with an insulating layer, so that the risk of burning during operation by the operating personnel is reduced, and it is advantageous, moreover, if the plate has at least one handle on its top side, so that the plate can be carried, even with bare hands, without the risk of burning.
In addition to the use described above, the inventors also propose a heating-up device for dissolving bonds of a packaging film around a hot-melt adhesive in a transporting container, the latter having at least one handle, a plate, the cross section of which is adapted to the cross section of the transporting container, and a heating device for the plate.
This heating device may, for example, have at least one electrically operated resistance wire or a gas burner.
Furthermore, it is proposed that the heating-up device be provided with a temperature control device, in order in each case to reach the desired melting temperature for the hot-melt adhesive on the plate. When reactive PUR hot melts are used, the melting temperature amounts to 60 to 120 C, preferably a temperature range for melting the hot melt of 80 to 100 C being provided. In the case of reactive polyolefin hot melts, the melting temperature amounts to 100 to 180"C. Accordingly, to melt the polyolefin hot melt, a preferred temperature range of 120' to 160 C is proposed.
The inventors basically propose two different embodiments for the heating-up device. On the one hand, a plate which is connected firmly to the heating device. For example, to the abovementioned resistance wires or a gas burner, in which case either a corresponding electrical line or a gas line or a gas storage container has to be connected to the plate for operation. On the other hand, it is proposed to separate the heating device and the plate from one another into specific units, so that the plate can be pushed into a heating device, the desired temperature of the plate can be set there, and the plate can be brought directly to the transporting container, without any other appendages, in order to melt the film cap. In this case, however, care must be taken to ensure that the heat capacity of such a plate is sufficient to be able to melt hot-melt adhesive sufficiently, without the selected initial temperature of the plate having to be too high, so as to avoid damage to the film.
Moreover, care must also be taken to ensure that the temperature of the plate is basically not set too high, since the hot-melt adhesive, if it reaches too high a temperature, is damaged thermally and releases monomeric isocyanates which may lead to symptoms of poisoning in the operating personnel. A further great advantage of the heating-up device according to the invention is to be seen precisely in this, since, in the industrial hot-air appliances used hitherto, a limitation of the temperature can be carried out only with great difficulty, whereas, in the heating-up devices presented here, for example, additional maximum limitation of the temperature, independently of the manually selectable temperature of the temperature control device, can be provided. Such maximum limitation should then be in a range which ensures that the release of isocyanates upon the contact of the plate with the hot-melt adhesive is not possible.
The inventors propose, moreover, a storage and transporting system for hot-melt adhesives, which consists of a film packaging for the hot-melt adhesive, of a transporting and storage container for receiving the hot-melt adhesive contained in the film packaging and of a heating-up device for dissolving bonds of the packaging film around the hot-melt adhesive in the transporting and storage container, said heating-up device at least consisting of a plate, the cross section of which is adapted to the cross section of the transporting and storage container, and of a means for generating heat on the plate.
The heating-up device may be, for example, a heatable cover of the transporting and storage container. One variant, in this case, is that, in the cover of the transporting and storage container, a cavity is provided, in which at least one chemical substance is embedded which, after an initial reaction, generates heat and heats the cover.
SYSTEM FOR HOT-MELT ADHESIVES
Technical Field The invention relates to the use of a heating-up device, to a heating-up device for dissolving bonds of a packaging film around a hot-melt adhesive in a transporting container and to a storage and transporting system for hot-melt adhesives.
Prior Art It is generally known that hot-melt adhesives (also designated as hot melts by persons skilled in the art) for industrial use are stored and transported in casks or in what is known as a Hoobock, the hot-melt adhesives being surrounded by an aluminum-coated PE bag to avoid a direct contact of the adhesive with the transporting container. Hot-melt adhesives used are, for example, reactive PUR hot melts or reactive polyolefin hot melts. To use such a hot-melt adhesive, the transporting container is opened on the top side, and the top side of the bag has to be cut off, so that the device for melting and suction-extracting the hot-melt adhesive can come directly into contact with the adhesive and the latter can be suction-extracted from the transporting container after previous heating.
One problem in this procedure is that the film bonds firmly with the cooled hot-melt adhesive and can be pulled off only with great difficulty. This is additionally made more difficult because the bag, as a rule, is not smooth along the top side, but has folds into which the hot-melt adhesive has flowed, consequently making it even more difficult to release the film. It is known, in this case, that, after the opening of the transporting container, the top side of the bag is heated by means of hot-air blowers, in order to release the film from the hot-melt adhesive, so that a "cover" of the bag can subsequently be cut out and removed. What is an additional problem in this case is that the hot-air blowers, although generating locally high heat, cannot generate any uniform heat over the entire surface of the upwardly exposed bag. This results in a relatively complicated procedure until such a transporting container can actually be employed for use in automatic machines. Furthermore, due to the local occurrence of very high temperature, thermal damage to and decomposition of the adhesive can sometimes arise.
Presentation of the Invention The object of the invention, therefore, is to find a device which simplifies the above-described procedure of releasing the film in the opening region of the container.
This object is achieved by means of the features of the independent patent claim. Advantageous developments of the invention are the subject matter of subordinate claims.
The inventors recognized that a uniform release of the film in the opening region of the transporting container by means of a heated plate is substantially simpler than the use of a hot-air blower, while the heating of such a plate, which preferably corresponds in cross section to the cross section of the transporting container, can be carried out in various ways.
According to this fundamental idea, the inventors propose the use of a heated plate for dissolving bonds of a packaging film around a hot-melt adhesive (hot melt) in a transporting container. The transporting container may in this case preferably be a cask, while the plate should preferably have a circular cross section. This plate may, for example, be led through an electrically operated resistance wire which is connected to the plate or there is the possibility of heating the plate with the aid of a gas-operated heating device.
There is also the possibility, however, of using a preheated plate. For example, preheating may take place in a type of oven, or there is also the possibility, if the plate consists essentially of metal, of transmitting the heat into the plate by means of induction currents.
If a preheated plate is used, the plate should have a heat output of between 0.2 and 2.0 KW. This heat output should in this case be calculated such that it is sufficient for its heat capacity to melt the respectively used hot-melt adhesive in the desired region, while at the same time the operating temperature of the heating plate must be selected such that no damage to the bag film used or to the adhesive occurs.
The plate may additionally be provided on the top side with an insulating layer, so that the risk of burning during operation by the operating personnel is reduced, and it is advantageous, moreover, if the plate has at least one handle on its top side, so that the plate can be carried, even with bare hands, without the risk of burning.
In addition to the use described above, the inventors also propose a heating-up device for dissolving bonds of a packaging film around a hot-melt adhesive in a transporting container, the latter having at least one handle, a plate, the cross section of which is adapted to the cross section of the transporting container, and a heating device for the plate.
This heating device may, for example, have at least one electrically operated resistance wire or a gas burner.
Furthermore, it is proposed that the heating-up device be provided with a temperature control device, in order in each case to reach the desired melting temperature for the hot-melt adhesive on the plate. When reactive PUR hot melts are used, the melting temperature amounts to 60 to 120 C, preferably a temperature range for melting the hot melt of 80 to 100 C being provided. In the case of reactive polyolefin hot melts, the melting temperature amounts to 100 to 180"C. Accordingly, to melt the polyolefin hot melt, a preferred temperature range of 120' to 160 C is proposed.
The inventors basically propose two different embodiments for the heating-up device. On the one hand, a plate which is connected firmly to the heating device. For example, to the abovementioned resistance wires or a gas burner, in which case either a corresponding electrical line or a gas line or a gas storage container has to be connected to the plate for operation. On the other hand, it is proposed to separate the heating device and the plate from one another into specific units, so that the plate can be pushed into a heating device, the desired temperature of the plate can be set there, and the plate can be brought directly to the transporting container, without any other appendages, in order to melt the film cap. In this case, however, care must be taken to ensure that the heat capacity of such a plate is sufficient to be able to melt hot-melt adhesive sufficiently, without the selected initial temperature of the plate having to be too high, so as to avoid damage to the film.
Moreover, care must also be taken to ensure that the temperature of the plate is basically not set too high, since the hot-melt adhesive, if it reaches too high a temperature, is damaged thermally and releases monomeric isocyanates which may lead to symptoms of poisoning in the operating personnel. A further great advantage of the heating-up device according to the invention is to be seen precisely in this, since, in the industrial hot-air appliances used hitherto, a limitation of the temperature can be carried out only with great difficulty, whereas, in the heating-up devices presented here, for example, additional maximum limitation of the temperature, independently of the manually selectable temperature of the temperature control device, can be provided. Such maximum limitation should then be in a range which ensures that the release of isocyanates upon the contact of the plate with the hot-melt adhesive is not possible.
The inventors propose, moreover, a storage and transporting system for hot-melt adhesives, which consists of a film packaging for the hot-melt adhesive, of a transporting and storage container for receiving the hot-melt adhesive contained in the film packaging and of a heating-up device for dissolving bonds of the packaging film around the hot-melt adhesive in the transporting and storage container, said heating-up device at least consisting of a plate, the cross section of which is adapted to the cross section of the transporting and storage container, and of a means for generating heat on the plate.
The heating-up device may be, for example, a heatable cover of the transporting and storage container. One variant, in this case, is that, in the cover of the transporting and storage container, a cavity is provided, in which at least one chemical substance is embedded which, after an initial reaction, generates heat and heats the cover.
Another possibility is that, in a cavity in the cover of the transporting and storage container, at least two chemical substances are embedded separately from one another, which, when they are mixed with one another, execute a chemical reaction which generates heat, with the result that the cover itself, in turn, is heated.
By means of these design variants, it is possible to implement an appropriate release of the film in the cover region even without any special infrastructure, such as a gas connection or electrical connection.
It is advantageous, particularly in the case of electrically operated heating-up devices, if there is in the heating-up device a temperature control device, by means of which a desired temperature can be achieved. A temperature control device of this type controls the supplied energy such that the desired temperature is reached on the heating-up device, so that the hot-melt adhesive can be melted, but neither the film nor the adhesive undergoes thermal damage.
After the hot-melt adhesive has melted, either the film can be cut open after the removal of the heating-up device or it can be cut open before the removal of the heating-up device. This may take place, for example, in that a knife is introduced into the gap between the heating-up device and the wall of the transporting container and is led along the contours of the heating-up device. Or the heating-up device may have on the underside one or more knives or cutting edges, particularly in the marginal region of the heating-up device. If such a knife or cutting edge is closed on itself, typically forms a circle, an orifice can be cut into the film or punched out. If only one knife or separate knives are present, cutting open can be implemented in a simple way, for example, by the heating-up device being rotated.
By means of these design variants, it is possible to implement an appropriate release of the film in the cover region even without any special infrastructure, such as a gas connection or electrical connection.
It is advantageous, particularly in the case of electrically operated heating-up devices, if there is in the heating-up device a temperature control device, by means of which a desired temperature can be achieved. A temperature control device of this type controls the supplied energy such that the desired temperature is reached on the heating-up device, so that the hot-melt adhesive can be melted, but neither the film nor the adhesive undergoes thermal damage.
After the hot-melt adhesive has melted, either the film can be cut open after the removal of the heating-up device or it can be cut open before the removal of the heating-up device. This may take place, for example, in that a knife is introduced into the gap between the heating-up device and the wall of the transporting container and is led along the contours of the heating-up device. Or the heating-up device may have on the underside one or more knives or cutting edges, particularly in the marginal region of the heating-up device. If such a knife or cutting edge is closed on itself, typically forms a circle, an orifice can be cut into the film or punched out. If only one knife or separate knives are present, cutting open can be implemented in a simple way, for example, by the heating-up device being rotated.
After the orifice has been made in the bag and the cut-out material has been removed, the hot-melt adhesive can be pressed out and/or suction-extracted from the bag. This typically takes place by the use of a plate, in particular a follow-up plate, which presses onto the hot-melt adhesive in the transporting container. The hot-melt adhesive is then led to the applicator through a suction-extraction line.
In one embodiment of the invention, the heating-up device is configured in such a way that it can also be used as a follow-up plate. In this case, a hot-melt adhesive discharge means, for example a hollow needle or a tubular connection piece, is integrated in the heating-up device. By a hot-melt adhesive discharge means of this type, the adhesive is discharged from the container. Sealing-off means are then preferably also present at the margin of the heating-up device.
Brief description of the drawings The invention is described in more detail below by means of preferred exemplary embodiments with the aid of the figures, only the features necessary for understanding the invention being illustrated. Like elements are given the same reference symbols in the various figures.
In the figures, in particular, fig. 1 shows a known storage container with hot-melt adhesive packaged in film;
fig. 2 shows a container according to figure 1 with a preheatable heating plate placed on top;
fig. 3 shows a container according to figure 1 with an electrically operated heating plate placed on top;
In one embodiment of the invention, the heating-up device is configured in such a way that it can also be used as a follow-up plate. In this case, a hot-melt adhesive discharge means, for example a hollow needle or a tubular connection piece, is integrated in the heating-up device. By a hot-melt adhesive discharge means of this type, the adhesive is discharged from the container. Sealing-off means are then preferably also present at the margin of the heating-up device.
Brief description of the drawings The invention is described in more detail below by means of preferred exemplary embodiments with the aid of the figures, only the features necessary for understanding the invention being illustrated. Like elements are given the same reference symbols in the various figures.
In the figures, in particular, fig. 1 shows a known storage container with hot-melt adhesive packaged in film;
fig. 2 shows a container according to figure 1 with a preheatable heating plate placed on top;
fig. 3 shows a container according to figure 1 with an electrically operated heating plate placed on top;
fig. 4 shows a container according to figure 1 with a gas-operated heating plate placed on top;
fig. 5 shows a container with a cover having an integrated heating-up device by means of two exothermally reacting substances;
fig. 6 shows a transporting container for hot-melt adhesive with a cover having an integrated electrical heating-up device;
fig. 7 shows a container with a solid metal cover and an induction heating device put in place;
fig. 8 shows a container with a solid cover having a gas burner put in place;
fig. 9 shows a container with a suction-extraction device.
Ways of implementing the invention Figure 1 shows a known transporting and storage container 1, what is known as a Hoobock, with an outer wall 2 and with a cover 3 arranged on top, which contains a hot melt 4, surrounded by a film 5 which, as indicated here by the corrugated lines in the upper region, usually makes folds and therefore makes it very difficult to release the film from the solidified hot melt.
According to the invention, for example, as shown in figure 2, the use of a heating-up device 6 is proposed.
In the embodiment shown here, the heating-up device 6 consists of a solid metal plate 7 which is heat-insulated upwardly by an insulating layer 8.
Fastened to the plate 7 is a carrying grip 9, by means of which the plate can be placed onto the hot melt, as shown in figure 2, without the risk of burning. Owing to the heat capacity of the preheated plate 7, the hot melt 4 begins to melt in the upper region, so that the "cover" of the film 5 can subsequently be cut and removed in a simple way.
Optionally, additional knives 10 arranged in the marginal region may also be fastened to the underside of the plate 7, so that, simultaneously with the melting of the hot melt, the film is trimmed off in this region, in that the plate 7, together with the knives, penetrates into the hot melt and consequently detaches the cover of the film, for example in the form of a circle. If these knives 10 are additionally provided with barbs or additional barbs 11 are attached to the underside of the plate, the detached film automatically comes loose from the heated-up hot melt after the plate has been raised.
Figure 3 shows a variant of a heating-up device 6 according to the invention which has a solid plate 7 in which electrical resistance wires 13 run and can heat it up. Fastened to the plate 7 is a carrying grip 9, by means of which the plate can be placed onto the hot melt, as shown in figure 2, without the risk of burning. By means of the heat of the plate 7, the hot melt 4 begins to melt in the upper region, so that the "cover" of the film 5 can subsequently be cut and removed in a simple way.
Here, too, additional knives 10 arranged in the marginal region may optionally be fastened to the underside of the plate 7, so that, simultaneously with the melting of the hot melt, the film is trimmed off in this region, in that the plate 7, together with the knives, penetrates into the hot melt and consequently detaches the cover of the film. Additional barbs may likewise be provided on the underside of the plate 7 and, after the film is detached, remove this from the heated-up hot melt.
fig. 5 shows a container with a cover having an integrated heating-up device by means of two exothermally reacting substances;
fig. 6 shows a transporting container for hot-melt adhesive with a cover having an integrated electrical heating-up device;
fig. 7 shows a container with a solid metal cover and an induction heating device put in place;
fig. 8 shows a container with a solid cover having a gas burner put in place;
fig. 9 shows a container with a suction-extraction device.
Ways of implementing the invention Figure 1 shows a known transporting and storage container 1, what is known as a Hoobock, with an outer wall 2 and with a cover 3 arranged on top, which contains a hot melt 4, surrounded by a film 5 which, as indicated here by the corrugated lines in the upper region, usually makes folds and therefore makes it very difficult to release the film from the solidified hot melt.
According to the invention, for example, as shown in figure 2, the use of a heating-up device 6 is proposed.
In the embodiment shown here, the heating-up device 6 consists of a solid metal plate 7 which is heat-insulated upwardly by an insulating layer 8.
Fastened to the plate 7 is a carrying grip 9, by means of which the plate can be placed onto the hot melt, as shown in figure 2, without the risk of burning. Owing to the heat capacity of the preheated plate 7, the hot melt 4 begins to melt in the upper region, so that the "cover" of the film 5 can subsequently be cut and removed in a simple way.
Optionally, additional knives 10 arranged in the marginal region may also be fastened to the underside of the plate 7, so that, simultaneously with the melting of the hot melt, the film is trimmed off in this region, in that the plate 7, together with the knives, penetrates into the hot melt and consequently detaches the cover of the film, for example in the form of a circle. If these knives 10 are additionally provided with barbs or additional barbs 11 are attached to the underside of the plate, the detached film automatically comes loose from the heated-up hot melt after the plate has been raised.
Figure 3 shows a variant of a heating-up device 6 according to the invention which has a solid plate 7 in which electrical resistance wires 13 run and can heat it up. Fastened to the plate 7 is a carrying grip 9, by means of which the plate can be placed onto the hot melt, as shown in figure 2, without the risk of burning. By means of the heat of the plate 7, the hot melt 4 begins to melt in the upper region, so that the "cover" of the film 5 can subsequently be cut and removed in a simple way.
Here, too, additional knives 10 arranged in the marginal region may optionally be fastened to the underside of the plate 7, so that, simultaneously with the melting of the hot melt, the film is trimmed off in this region, in that the plate 7, together with the knives, penetrates into the hot melt and consequently detaches the cover of the film. Additional barbs may likewise be provided on the underside of the plate 7 and, after the film is detached, remove this from the heated-up hot melt.
A similar variant of the heating-up device is illustrated in figure 4, but, here, the necessary heat is generated by gas nozzles 19 which are mounted above the plate 7. The supply of energy can be ensured by means of a connected gas bottle 20.
Another variant of a heating-up device according to the invention is shown in figure 5. This illustrates a transporting and storage container 1 having a cover 3 in which is arranged on the underside a cavity containing two chemical substances 12.1 and 12.2 which are initially separated from one another by a membrane 21. When this membrane 21 is destroyed and the two chemicals come into contact with one another, an exothermal chemical reaction takes place, which leads to a strong heating of the cover or of the underside of the cover, as a result of which, here too, that region of the film 5 which is accessible after the opening of the cover 3 is strongly heated, and consequently a melting of the hot melt takes place, thus making it possible to cut off the upper region of the bag easily.
In order to ensure that the heat generated by the exothermal reaction of the chemicals is also utilized as fully as possible for heating the hot melt 4, an additional heat insulation layer 8 may be mounted above the chemicals.
Figure 6 shows a similar variant of a transporting and storage container 1. Here, however, the cover 3 is equipped with additional resistance wires 13 which are connected to an electrical connection 14. When current is applied to the electrical connection 14, the cover 3 heats up automatically, and in this case a temperature control may additionally be arranged, integrated in the cover. For example, this may be a bimetal switch which, when a preset maximum temperature is reached, opens the electrical connection to the resistance wires and consequently rules out overheating.
Another variant of a heating-up device according to the invention is shown in figure 5. This illustrates a transporting and storage container 1 having a cover 3 in which is arranged on the underside a cavity containing two chemical substances 12.1 and 12.2 which are initially separated from one another by a membrane 21. When this membrane 21 is destroyed and the two chemicals come into contact with one another, an exothermal chemical reaction takes place, which leads to a strong heating of the cover or of the underside of the cover, as a result of which, here too, that region of the film 5 which is accessible after the opening of the cover 3 is strongly heated, and consequently a melting of the hot melt takes place, thus making it possible to cut off the upper region of the bag easily.
In order to ensure that the heat generated by the exothermal reaction of the chemicals is also utilized as fully as possible for heating the hot melt 4, an additional heat insulation layer 8 may be mounted above the chemicals.
Figure 6 shows a similar variant of a transporting and storage container 1. Here, however, the cover 3 is equipped with additional resistance wires 13 which are connected to an electrical connection 14. When current is applied to the electrical connection 14, the cover 3 heats up automatically, and in this case a temperature control may additionally be arranged, integrated in the cover. For example, this may be a bimetal switch which, when a preset maximum temperature is reached, opens the electrical connection to the resistance wires and consequently rules out overheating.
Figure 7 shows a variant in which the heating device is present separately from the plate, integrated in the cover, for heating up the hot melt. The cover 3 of the transporting container is designed here in the form of a relatively solid metal plate, onto which an induction device 15 can be placed. This induction device generates an eddy current in the cover 3 via built-in electromagnets 16, with the result that a heating of the cover 3 occurs and, in turn, in the upper region of the hot melt 4, a melting of the film 5 located there becomes possible.
In addition, figure 8 also shows a variant in which the cover 3 of the transporting and storage container 1 can be heated with the aid of a gas burner 17 put in place.
The gas burner 17 corresponds to the shape of the cover and is put in place with fixed spacers 18, so that the nozzles 19 are at an optimal distance from the cover 3 located beneath them. Of course, there is the possibility of additionally building an automatic ignition device, not illustrated here, into a gas burner of this type, so that, first, the burner 17 can be placed onto the cover, and after the gas has been delivered from a gas bottle 20, a reliable ignition of the gas at the nozzles 19 takes place.
After the upper film has been released and removed from the hot melt by means of the device according to the invention, a suction-extraction device can then be put in place, by means of which the hot melt can be heated, suction-extracted and delivered to a manufacturing process. Such a situation is illustrated in figure 9 which shows a cask with its housing 2 in which the hot melt 4 is located. The upper part of the film 5 is already removed and the suction-extraction device 22 is put in place. The suction-extraction device 22 contains resistance wires 13 which heat up a metallic plate 7.
The upper region of the hot melt is thereby melted, and the molten hot melt can be drawn off via a hollow needle 23 having a connected suction line 24. With progressive suction extraction, the suction-extraction device 22 descends downward, indicated by the two arrows, in the cask, until the stock of hot melt is used up.
Overall, therefore, the invention makes it possible simply and quickly to release the molten bond of a hot melt in the upper region of the transporting and storage container from the surrounding film and consequently to deliver the hot melt quickly and simply for further processing.
It will be appreciated that the abovementioned features of the invention may be used not only in the combination specified in each case, but also in other combinations or alone, without departing from the scope of the invention.
In addition, figure 8 also shows a variant in which the cover 3 of the transporting and storage container 1 can be heated with the aid of a gas burner 17 put in place.
The gas burner 17 corresponds to the shape of the cover and is put in place with fixed spacers 18, so that the nozzles 19 are at an optimal distance from the cover 3 located beneath them. Of course, there is the possibility of additionally building an automatic ignition device, not illustrated here, into a gas burner of this type, so that, first, the burner 17 can be placed onto the cover, and after the gas has been delivered from a gas bottle 20, a reliable ignition of the gas at the nozzles 19 takes place.
After the upper film has been released and removed from the hot melt by means of the device according to the invention, a suction-extraction device can then be put in place, by means of which the hot melt can be heated, suction-extracted and delivered to a manufacturing process. Such a situation is illustrated in figure 9 which shows a cask with its housing 2 in which the hot melt 4 is located. The upper part of the film 5 is already removed and the suction-extraction device 22 is put in place. The suction-extraction device 22 contains resistance wires 13 which heat up a metallic plate 7.
The upper region of the hot melt is thereby melted, and the molten hot melt can be drawn off via a hollow needle 23 having a connected suction line 24. With progressive suction extraction, the suction-extraction device 22 descends downward, indicated by the two arrows, in the cask, until the stock of hot melt is used up.
Overall, therefore, the invention makes it possible simply and quickly to release the molten bond of a hot melt in the upper region of the transporting and storage container from the surrounding film and consequently to deliver the hot melt quickly and simply for further processing.
It will be appreciated that the abovementioned features of the invention may be used not only in the combination specified in each case, but also in other combinations or alone, without departing from the scope of the invention.
List of Reference symbols 1 Transporting and storage container 2 Housing 3 Cover 4 Hot melt (hot-melt adhesive) 5 Film 6 Heating-up device 7 Plate 8 Insulating layer 9 Carrying grip 10 Knife 11 Barb 12.1 First chemical substance 12.2 Second chemical substance 13 Resistance wire 14 Electrical connection 15 Induction device 16 Magnet 17 Gas burner 18 Spacer 19 Gas nozzles 20 Gas bottle 21 Membrane 22 Suction-extraction device 23 Hollow needle 24 Suction line
Claims (22)
1. A use of a heated plate (7) for dissolving bonds of a packaging film (5) around a hot-melt adhesive (4) in a transporting container (1).
2. The use as claimed in the preceding patent claim 1, characterized in that the transporting container (1) is a cask.
3. The use as claimed in one of the preceding patent claims 1 and 2, characterized in that the plate (7) has a circular cross section.
4. The use as claimed in one of the preceding patent claims 1 to 3, characterized in that the plate (7) is connected to an electrically operated resistance wire (13).
5. The use as claimed in one of the preceding patent claims 1 to 3, characterized in that the plate (7) is equipped with a gas-operated heating device (17).
6. The use as claimed in one of the preceding patent claims 1 and 2, characterized in that the plate (7) is a preheated plate.
7. The use as claimed in one of the preceding patent claims 1 to 6, characterized in that the plate (7) has a heat output of between 0.2 KW and 2.0 KW.
8. The use as claimed in one of the preceding patent claims 1 to 7, characterized in that the plate (7) has an insulating layer (8) on its top side.
9. The use as claimed in one of the preceding patent claims 1 to 8, characterized in that the plate (7) has at least one handle (9) on its top side.
10. A heating-up device for dissolving bonds of a packaging film (5) around a hot-melt adhesive in a transporting container, with:
- at least one handle (9), - a plate (7), the cross section of which is adapted to the cross section of the transporting container (1), and - a heating device (12.1, 12.2, 15, 17) for the plate (7).
- at least one handle (9), - a plate (7), the cross section of which is adapted to the cross section of the transporting container (1), and - a heating device (12.1, 12.2, 15, 17) for the plate (7).
11. The heating-up device as claimed in the preceding patent claim 10, characterized in that the heating device has at least one electrically operated resistance wire (13).
12. The heating-up device as claimed in the preceding patent claim 10, characterized in that the heating device has at least one gas burner (17, 19).
13. The heating-up device as claimed in one of the preceding patent claims 10 to 12, characterized in that a temperature control device is provided.
14. The heating-up device as claimed in one of the preceding patent claims 10 to 13, characterized in that the heating device is connected firmly to the plate (7).
15. The heating-up device as claimed in one of the preceding patent claims 10 to 13, characterized in that the heating device and the plate (7) can be separated from one another.
16. The heating-up device as claimed in one of the preceding patent claims 10 to 15, characterized in that the heating-up device has a hot-melt adhesive discharge means, in particular in the form of a hollow needle or of a tubular connection piece.
17. The heating-up device as claimed in one of the preceding patent claims 10 to 16, characterized in that the heating-up device has one or more knives on the underside.
18. A storage and transporting system for hot-melt adhesives, consisting of - a film packaging (5) for the hot-melt adhesive, - a transporting and storage container (1) for receiving the hot-melt adhesive (4) contained in the film packaging (5), and - a heating-up device for dissolving bonds of the packaging film (5) around the hot-melt adhesive (4) in the transporting and storage container (1), said heating-up device at least consisting of a plate (7), the cross section of which is adapted to the cross section of the transporting and storage container (1), and of a means for generating heat (12.1, 12.2, 13, 15, 17) on the plate.
19. The storage and transporting system as claimed in the preceding patent claim 18, characterized in that the heating-up device is a heatable cover (3) of the transporting and storage container (1).
20. The storage and transporting system as claimed in the preceding patent claim 19, characterized in that, in the cover (3) of the transporting and storage container (1), a cavity is provided, in which at least one chemical substance (12.1, 12.2) is embedded which, after an initial reaction, generates heat and heats the cover (3).
21. The storage and transporting system as claimed in the preceding patent claim 19, characterized in that, in the cover (3) of the transporting and storage container (1), a cavity is provided, in which at least two chemical substances (12.1, 12.2) are embedded separately from one another, which together execute a chemical reaction which generates heat and heats the cover (3).
22. The storage and transporting system as claimed in the preceding patent claim 18, characterized in that the heating-up device has the features of one of claims to 17.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05112957.5 | 2005-12-23 | ||
| EP05112957A EP1801018A1 (en) | 2005-12-23 | 2005-12-23 | Use of a heating device and system for transport and storage of hot melt glue |
| PCT/EP2006/070156 WO2007074141A1 (en) | 2005-12-23 | 2006-12-22 | Use of a heating-up device and transporting and storage system for hot-melt adhesives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2634834A1 true CA2634834A1 (en) | 2007-07-05 |
Family
ID=36118233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002634834A Abandoned CA2634834A1 (en) | 2005-12-23 | 2006-12-22 | Use of a heating-up device and transporting and storage system for hot-melt adhesives |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP1801018A1 (en) |
| JP (1) | JP2009520654A (en) |
| CA (1) | CA2634834A1 (en) |
| WO (1) | WO2007074141A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217451B (en) * | 2019-04-30 | 2022-04-05 | 北京航星机器制造有限公司 | Method for nondestructively rendering paper adhesive seal ineffective |
| CN110920302B (en) * | 2019-10-30 | 2021-06-01 | 北京航星机器制造有限公司 | Method for nondestructively disabling seal of film-covered hard paper double-sided adhesive tape |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5318198A (en) * | 1990-11-02 | 1994-06-07 | H.B. Fuller Licensing & Financing Inc. | Hot melt adhesive container for use with heated platen dispensing equipment |
| DE10252572B4 (en) * | 2002-11-12 | 2006-06-01 | Bausch + Ströbel Maschinenfabrik Ilshofen GmbH + Co. | Method and apparatus for removing a cover sheet closing the opening of a syringe magazine box |
-
2005
- 2005-12-23 EP EP05112957A patent/EP1801018A1/en not_active Withdrawn
-
2006
- 2006-12-22 WO PCT/EP2006/070156 patent/WO2007074141A1/en active Application Filing
- 2006-12-22 JP JP2008546481A patent/JP2009520654A/en not_active Withdrawn
- 2006-12-22 EP EP06830807A patent/EP1966050A1/en not_active Withdrawn
- 2006-12-22 CA CA002634834A patent/CA2634834A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1966050A1 (en) | 2008-09-10 |
| JP2009520654A (en) | 2009-05-28 |
| WO2007074141A1 (en) | 2007-07-05 |
| EP1801018A1 (en) | 2007-06-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |