BE1020417A3 - FORMING MACHINE AND METHOD FOR PRODUCING PREFORMED PACKAGING. - Google Patents

Description

The invention relates to a forming machine, in particular a blister machine, comprising a first forming part and a second forming part, the first forming part and the forming part. second forming part being arranged to be movable towards each other to form a sheet material disposed therebetween.

Such blister machines are known and are used to manufacture preforms / eg blister pack receiving shells or coatings for computer keyboards or similar objects made of sheet material.

The invention also relates to a method for producing a preformed package, in particular a blister package, a sheet material being disposed between a first forming part and a second forming part and the two forming parts being displaced. to one another in a closed position and forming the recesses of the preformed packages.

Such methods are used for the production of preforms, in particular preforms for packaging, in particular receiving shells in the case of blister packagings.

The method described is known, for example, from the document 2007 041 948 A1 in which the blister machine described therein is used as a forming device for setting sheet material into a desired shape.

In order to obtain as wide a pallet as possible of different aesthetic and functional effects on the finished blister pack, it is oroposed in document DE 10 2007 041 948 A1 to place downstream of the forming unit an injection station in the material flow, which provides a variable coating of the sheet portions formed with different plastics, in particular of different colors.

The invention aims to reduce the production time for a preformed in a blister machine of the type mentioned at the beginning.

To achieve this object, it is provided in a forming machine of the type mentioned at the beginning that at least one of the forming parts is coupled with an injection molding device, the injection molding device having at least one nozzle of spray directed each time to the other forming part. The invention thus allows the plastic to be sprayed onto the sheets while the sheet material is disposed between the forming pieces. The transfer of the molded sheet material into a spray station is therefore no longer necessary and the preformed production time produced is reduced.

In this case, an injection molding device may each time be coupled or connected to each of the forming parts or a common injection molding device may be provided. The spray nozzle (s) of the injection molding device (s) provide (s) the plastic material necessary to spray on the desired structure shape.

Packing preforms, thus packaging preforms, especially blister packs, can advantageously be produced as preforms.

According to one embodiment of the invention, it may be provided that the injection molding device (s) is (are) disposed stationarily, its spray nozzle (s) being mounted (s) in recesses of the forming part concerned.

In this case or when the spray nozzle (s) is (are) connected to a forming part, flexible hoses can be arranged between the spray nozzles and the injection molding devices in which the Plastic granulate is heated and subjected to pressure.

In general, the spray nozzles are disposed at locations, in recesses of the forming part concerned, which correspond to the desired positions on the finished blister package on which the plastics material will be sprayed. Several spray nozzles can therefore also be connected to an injection molding device.

When the injection molding machine (s) is (are) disposed on the forming part concerned so as to be displaced therewith, a particularly compact embodiment results.

In one embodiment of the invention, it may be provided that the first forming part and / or the second forming part is (are) displaceably arranged on guiding means. Such guiding means allow a defined displacement of the two forming pieces towards one another. In this case, it can be provided that only the first forming part, only the second forming part or the two forming parts are moved towards each other.

In order to move the first and / or the second forming part, at least one driving device can be provided for the forming parts.

If both the first forming part and the second forming part are displaced, a separate driving device can be provided by each of the forming parts or a driving device which jointly drives the two forming parts.

It is particularly advantageous in this case that the drive device has a servomotor. It is advantageous in this case that the different phases of the closing movement during the displacement of the forming part (forming parts) can be controlled and that a controlled adjustment of the pressure force is possible in the closed position.

According to one embodiment of the invention, it is provided that the drive device has at least one fluid cylinder with which the first forming part and / or the second forming part can be moved. It is advantageous in this case that, to operate the fluid cylinder, it can be subjected to the action of a fluid that is provided by a pressure device of the injection molding device.

A compact form of construction is formed when at least one chamber of the fluid cylinder is configured as a sealed cavity between a guide means and the forming part mounted on the guide means.

It is preferably provided that a piston of the fluid cylinder is formed on the guide means. This piston can go back and forth in the sealed cavity, a fluid being introduced into the cavity according to the known operating mode of a fluid cylinder. It is particularly advantageous in this case that the piston subdivides the sealed cavity into two partial chambers which are alternately subjected to the action of the fluid to move the piston and thus the forming part and whose volume increases and decreases alternately during the work of the fluidic jack.

When at least one fluid channel, which opens into a chamber of the fluid cylinder, is formed in the guide means, a particularly robust, damage-resistant embodiment results. The fluidic channel is thus protected against damage by the guiding means in any case robust manner. The fluidic channel preferably extends in part along or parallel to the moving movement of a forming piece or forming pieces.

It is particularly advantageous in this case that the fluidic channel is formed in the piston of the fluid cylinder and opens on a piston bottom in the chamber of the fluid cylinder. The fluid can thus be introduced in a particularly simple manner into the chamber concerned. The piston bottom is in this case a surface of the piston which is directed towards a chamber of the fluid cylinder which is limited by the piston.

To prevent cracks and similar damages in the sheet material from occurring during the forming process, a control device can be provided for adjusting the speed of movement of the first forming part and / or the second forming part. .

To limit the path of movement of at least one forming part in the closed position, it can be provided that a stop preferably configured as an annular sleeve is provided on or at the level of the guide means.

According to one embodiment of the invention, it can be provided that said at least one nozzle of said at least one injection molding device and / or the injection molding device is removably connected to the forming part concerned. It is advantageous in this case that the forming part or the forming parts are simply interchangeable to modify the configuration of the product preform. Adaptation measures to the injection molding device are not necessary.

To provide an even wider range of aesthetic and / or functional elements, a device for introducing a gap in the sheet material may be provided on the forming machine. This device can in this case be placed upstream in the material flow of the forming machine or be integrated in a forming part or in the forming parts. By introducing gaps, projections of material which are to extend from both sides of the sheet material can be injection molded into one operation.

To achieve the object, it is provided according to a method of the type mentioned at the beginning that the material is overmolded, in the injection molding process, on the sheet material in the closed position of the two forming parts. It is advantageous in this case that the transport time per finishing cycle of the sheet material between the different workstations is reduced.

For example, the material may be overmolded on the inside side in the use position of the preform, in particular the blister package and / or on the outside side in the position of use of the preformed.

Alternatively or additionally, it can be provided that gaps are formed on the sheet material or introduced into the sheet material, which gaps are filled by the overmolded material.

Subsequent reduction of finishing time per finishing cycle is achieved when an article to be wrapped is at least partially coated with the material in the injection molding process. In this case, the material is preferably overmolded on both sides of the sheet material at a gap. The object to be wrapped is thus retained on the preformed by the overmolded material and can be removed, in that the overmolded material is broken from the gap through which it passes. It is particularly advantageous in this case that the overmolded material forms a handle of the object to be packaged.

It may be provided in this case that the object to be packaged is disposed, prior to the injection molding process, in the recesses of the preform so that it is packaged in the preformed package after closing the preform.

In order to obtain a uniform external appearance, it may be provided that the injection molding points of the injection molding process are made on the inside side in the use position of the blister pack. Here too, gaps can be advantageously used in the sheet material in the manner described.

The invention will now be described in more detail on the basis of exemplary embodiments, but it is however not limited to these exemplary embodiments. Other exemplary embodiments result from the combination of the features of the claims taken separately from each other and / or with individual characteristics or several characteristics of the exemplary embodiments.

It is shown diagrammatically in: FIG. 1 a blister machine with the forming parts in the closed position, FIG. 2 the blister machine according to FIG. 1 with the forming parts in the open position, FIG. blister machine according to the invention with forming parts in the closed position, Figure 4 the blister machine according to Figure 3 with the forming parts in the open position, Figure 5 another blister machine according to the invention with two injection molding devices and the forming parts in the closed position, Figure 6 the blister machine according to Figure 5 with the forming parts in the open position, Figure 7 another blister machine according to the invention for the overmolding of material on both sides with the forming parts in the closed position, FIG. 8 the blister machine according to FIG. 7 with the forming parts in the open position, FIG. it is a principle to manufacture a blister pack in a process according to the invention and FIG. 10 a blister pack made with the method according to the invention in a blister machine according to the invention.

Figure 1 shows in a sectional representation a forming machine designated 1 by way of example as a blister machine.

The blister machine 1 has a first forming part 2 and a second forming part 3 which are arranged so that they can be moved towards each other.

A sheet material 4 from which the shell of the blister package is formed is placed between the first forming part 2 and the second forming part 3.

In the closed position of the first forming part 2 and the second forming part 3, shown in FIG. 1, the previously heated sheet material is formed by the corresponding shaped forming parts 2, 3 punch and die.

The surfaces of the forming pieces 2, 3 oriented toward each other thus form two mold halves for the forming process.

To overmold additional material onto the molded sheet material 4 or during the forming process, the blister machine 1 has an injection molding device 5.

The injection molding device 5 comprises a hopper 6 for receiving the granulate, a cylinder 7 for melting and compressing the granulate and a dispenser 8 with which the molten granulate is dispensed to spray nozzles for overmolding on the sheet material 4 .

In this case, the spray nozzles 9 pass through the second lower forming part 3 and are directed towards the first forming part 2. The spray nozzles 9 thus open onto the surface of the second forming part 3 which is oriented towards the first forming part 2. Other non-visible recesses are formed in the second forming part 3 to receive and form the pulverized material.

The forming parts 2, 3 are respectively mounted interchangeably on a support 10, 11 and can be replaced when another forming is desired for the sheet material 4.

The forming parts 2, 3 are displaceably mounted and guided by means of their own support 10, 11 on guide means 12, 13. Each of the guide means 12, 13 is embodied in the embodiment example. like a round tree.

The supports 10, 11 are guided, as can be seen in Figure 1, on the same guide means 12, 13, so on common guide means. Each support 10, 11 is guided in total on four guide means 12, 13.

The injection molding machine 5 is integrally connected to the support 11 of the second forming part 3 and is moved therewith when the carrier 11 is moved up or down.

To limit the path of the second forming part 3 and to reach a defined position of the forming parts 2, 3 in the closed position, a stop 14 against which the second forming part 3 is moved is formed on the guide means 13, after which the first forming part 2 is moved against the second forming part 3 adjacent to the stop 14 to deform the sheet material 4.

In the exemplary embodiment, the stop 14 is designed as an annular sleeve which is placed on the guide means 13.

To move the support 10 with the first forming part 2 fixed thereto, a fluid cylinder 15 is provided.

The fluidic jack 15 comprises two chambers 16, 17 which are separated from each other by a piston 18.

These chambers 16, 17 are part of a cylindrical bore 38 in the support 10 of the first forming part 2.

The guiding means 13 is guided coaxially through the cylindrical chambers 16, 17. The chambers 16, 17 are closed at their outer axial end by sealing sleeves 19.

The piston 18 is made as a cylindrical piece with a central bore through which the guide means 13 is guided.

Fluidic channels 20 and 21 which each time open on one side of the piston 18 on the piston bottom 37 in a chamber 16, 17 of the fluidic jack 19 are formed in the guide means 13.

Thus, by sending a fluid into the fluidic channel 20, the support 10 is displaced upwards and by sending a fluid into the fluidic channel 21, the support 10 is moved downwards.

In this case, the sealing sleeves 19 are respectively slidably mounted on the guide means 13, while the piston is firmly connected to the guide means 13.

A fluidic jack 22 which can be moved downwards or upwards by the action exerted on the fluidic channels 23 and 24 is produced in the same way on the support 11.

Sealing sleeves 25 and a piston 26 are made in the same manner on the guide means 12, however without fluidic channels, to guide the movement of the movement of the supports 10, 11. Here again, the sealing sleeves can slide on the guide means 12, while the piston 26 of cylindrical shape is firmly connected to the guide means 12 and slides in the cylindrical bore 27 in the support 10 or 11.

The fluidic cylinders 19, 22 and the pistons 26 are made in the bearings of the guides of the supports 10, 11 on the guide means 12, 13.

The injection molding device 5, in particular a pin disposed in the cylinder 7, for compressing the material, is driven by a fluid. This fluid is also used to feed the fluidic channels 20, 21, 23, 24.

In this case, the speed of movement of the first forming part 2 to the second forming part 3 can be adjusted by adjusting the pressure via a not shown control device.

The nozzles 9 are removably connected to the second forming part 3, for which reason the second forming part 3 can simply be replaced to obtain another forming of the sheet material 4.

Figure 2 shows the blister machine according to Figure 1, the forming parts 2, 3 being now open and the formed sheet material 4 being released.

It will be seen that, by means of forming parts 2, 3, protrusions 28 are formed on the sheet material in which articles to be packaged are placed from above in the representation. In the example, these projections 28 are designed to receive toothbrushes, but any other shapes may also be made, for example for medicinal preparations.

To load the receiving shell formed from the sheet material 4 with articles to be packaged, the formed sheet material 4 is removed or expelled in the direction indicated by the arrow.

After loading, the blister package is completed by applying a cover sheet by which the objects to be packaged are covered from the outside - on the representation according to Figure 2 from above.

It can be seen in FIG. 2 that the nozzles 9 provided in the second forming part 3 are arranged on the outside of the blister pack manufactured to overmold material 5.

The blister machine 1 is placed as a whole on a seat 29 and the predefined movement paths by the guide means 12, 13 are oriented vertically.

Figure 3 shows another blister machine 1 according to the invention in a schematic sectional representation.

The constituent parts identical to those of the blister machine 1 according to FIG. 1 are designated by the same reference numerals and are shown in the same way and will not be separately described once again.

The blister machine 1 according to FIG. 3 differs from the blister machine 1 according to FIG. 1 because the injection molding machine 7 is now fixed with the distributor 8 and the nozzles 9 on the support 10 of the first part. of forming 2 and is moved with it.

As can be seen in FIG. 4, it is possible with the blister machine 1 according to FIG. 3 to apply material to areas of the projections 28 of the sheet material, which areas are located inside when blister package is closed or filled, so in use position. In this case, not visible notches are formed on the first forming part 2 to receive the applied material.

With this arrangement, the spray points of the injection molding process are thus made on the side located inside the blister pack in the use position.

With regard to the blister machine 1 shown in FIG. 5 in a diagrammatic sectional view, the constituent elements that are unchanged and / or functionally identical with respect to the blister machine 1 according to FIG. 1 and / or according to FIG. designated by the same reference numbers and represented in the same way.

The blister machine 1 in FIG. 5 comprises two injection molding devices 5 which are respectively coupled to a support 10 or 11.

Material is thus sprayed onto the sheet material 4 formed or overmolded on both sides by means of the nozzles 9. In this case, non-visible recesses are formed in the corresponding positions on the forming parts 2, 3 for receive the injected material.

Figure 7 shows another blister machine for which the constituent elements identical to those of Figure 1 are designated by the same reference numbers and are shown in the same way and are not described separately.

The blister machine 1 according to FIG. 7 differs from the blister machine 1 according to FIG. 1 in that the forming parts 2, 3 are designed in such a way that synthetic material 31 can be sprayed on both sides of the machine. sheet material 4 inserted and formed in the hole-like gap region of the sheet material 4.

For this purpose, recesses or notches which - as shown in the enlarged detail in FIG. 7 - can be filled by the spray nozzles 9 with material 31 are formed in the forming parts 2, 3 in the regions that are consistent with such gaps.

As can be seen in FIG. 8, a receiver shell of the blister package to be manufactured can be formed with this blister machine from the sheet material 4 in which applications 32 are overmolded onto the protrusions 28. Application is shown enlarged in a sectional representation by way of example in FIG.

The injected material 31 passes through the gap 30 and extends on both sides of the sheet material 4, thus on the inside in the use position of the blister package and on the outside side.

Fig. 9 shows a blister pack made with the blister machine 1 according to Fig. 7 in which the projections 28 of the sheet material 4 are filled with applications 32 which are designed as part of small mascara brushes.

These small mascara brushes are composed of a yarn 33 with brush filaments 34 and a handle designated 31.

The handle 31 is formed in the region of the gap 30, on the sheet material 4 formed in the injection molding process as previously described, and is thus maintained by the gap 30 in the blister package. A housing 35 for the end of the wire 33 is formed in the handle 31 by the overmoulding process.

Then, the protrusions 28 are closed by a cover sheet 36 and the resulting blister package loaded with small mascara brushes, shown in FIG.

To manufacture the blister package, a sheet material 4 is thus disposed between the first forming part 2 and the second forming part 3 in the blister machines shown in FIG. 1 in FIG.

Then, the two forming parts 2, 3 are moved towards each other in a closed position, the depressions or projections 28 of the blister pack being thus formed.

In doing so or subsequently, the material is overmolded, in the closed position of the two forming parts 2, 3, on the sheet material 4 in the context of the injection molding process.

The blister machines 1 with their forming parts 2, 3 are designed in this case so that the material 31 is formed on the inside side in the use position of the blister package, on the side located outside or on both sides of the projection 28.

In the blister machine 1 according to FIGS. 7 and 8, a gap 30 in the formed sheet material 4 is filled by the overmolded material 31.

Thus, an object to be wrapped 33, 34 may be at least partly coated with the material 31.

The closing movement of the two forming parts 2, 3 is adjusted in such a way that the movement of the forming parts 2, 3 towards each other is carried out rapidly until the forming parts 2, 3 3 hot reach the preheated sheet material 4. The speed of the movement movement is then reduced until the closed position is reached. The pressing force of the forming parts against each other in the closed position is limited such that the sheet material is neither damaged nor destroyed.

The object to be wrapped 33, 34 is disposed, before the injection molding process, in the form concerned so that after closing the blister package, it is disposed therein.

The forming machine 1 has two mutually displaceable forming parts 2, 3 which are designed for the thermoplastic forming of a sheet material 4, an injection molding device 5 which is configured or designed to inject plastic material 31 on the sheet material 4 disposed between the forming parts 2, 3 being coupled to or connected to at least one forming part 2, 3.

Claims (21)

1. Forming machine (1), in particular blister machine, with a first forming part (2) and a second forming part (3), the first forming part (2) and the second forming part (3). ) being displaceably arranged towards one another for forming a sheet material (4) arranged therebetween, characterized in that at least one of the forming parts (2) is coupled to a injection molding (5) having at least one spray nozzle (9) each directed to the other forming piece (2, 3). 2. forming machine (1) according to claim 1, characterized in that the (s) device (s) injection molding (5) is (are) arranged stationarily and their (s) nozzle (s) of spray (9) is (are) slidably mounted in recesses (28) of the forming part (2, 3). 3. forming machine (1) according to claim 1 or 2, characterized in that the (the) injection molding machine (s) (5) is (are) arranged on the forming part (2, 3) concerned so as to be moved with it. Forming machine (1) according to one of Claims 1 to 3, characterized in that the first forming part (2) and / or the second forming part (3) is arranged / arranged in a displaceable manner. on guiding means (12, 13). 5. forming machine (1) according to any one of claims 1 to 4, characterized in that at least one drive device (15, 22) is provided for the forming parts (2, 3). 6. forming machine (1) according to any one of claims 1 to 5, characterized in that said at least one driving device has a servomotor. 7. forming machine (1) according to any one of claims 1 to 6, characterized in that the drive device has at least one fluid cylinder (15, 22) with which the first forming part (2) and or the second forming part (3) is displaceable / movable. 8. forming machine (1) according to any one of claims 1 to 7, characterized in that a chamber (16, 17) of the fluidic jack (15, 22) is designed as a sealed cavity between a guide means ( 12, 13) and the forming part (2, 3) mounted on this guide means (12, 13) or its support (10, 11). 9. forming machine (1) according to any one of claims 1 to 8, characterized in that a piston (18) of the fluid cylinder (15, 22) is formed on the guide means (12, 13). 10. forming machine (1) according to any one of claims 1 to 9, characterized in that at least one fluidic channel (20, 21, 23, 24) which opens into a chamber (16, 17) of the fluid cylinder (15, 22) is formed in the guide means (12, 13). 11. forming machine (1) according to any one of claims 1 to 10, characterized in that the fluid channel (20, 21, 23, 24) is formed in the piston (18) of the fluid cylinder (15, 22 ) and opens at a piston bottom in the chamber (16, 19) of the fluid cylinder (15, 22). Shaping machine (1) according to one of claims 1 to 11, characterized in that a control device is provided for adjusting the speed of movement of the first forming part (2) and / or the second forming part (3). 13. forming machine (1) according to any one of claims 1 to 12, characterized in that said at least one nozzle (9) of said at least one injection molding device (5) is removably connected to the forming part (2, 3) concerned. Forming machine (1) according to one of claims 1 to 13, characterized in that a device is provided for making a gap (30) in the sheet material (4). A method for producing a preformed package, in particular a blister package, wherein a sheet material (4) is disposed between a first forming part (2) and a second forming part (3) and the two forming parts (2). , 3) being displaced towards each other in a closed position and forming at least one projection (28) of the preformed package, characterized in that in the closed position of the two forming parts (2, 3 ), material 31 is overmolded onto the sheet material (4) as part of the injection molding process 16. The method of claim 15, characterized in that the material (31) is overmolded on the side of the projection (28) which is located inside in the position of use of the preformed package. 17. The method of claim 15 or 16, characterized in that the material (31) is overmolded on the side located outside in the position of use of the preformed package. Method according to one of claims 15 to 17, characterized in that gaps (30) through which the overmolded material (31) is introduced are formed on the sheet material (4) or are made from the sheet (4). 19. A method according to any one of claims 15 to 18, characterized in that an object to be wrapped (33, 34) is at least partly coated with the material (31) in the injection molding process. 20. Process according to any one of claims 15 to 19, characterized in that the object to be wrapped (33, 34) is disposed, before the injection molding process, in such a manner as in said at least one protrusion (28). ) of the preformed packaging that it is packed, after closing the preformed packaging, in the preformed packaging. Method according to one of Claims 15 to 20, characterized in that injection molding points are formed on the inside side in the position of use of the preformed packaging in the molding process. by injection.