Container treatment system for treating containers

Abstract

The invention relates to a container treatment system for treating containers, said container treatment system comprising a blow molding machine for producing containers from preforms, a transport device arranged upstream of the blow molding machine for transporting preforms to the blow molding machine, a production machine, in particular an injection molding machine, for producing preforms, a sorting device, and an unsorted supply of preforms, wherein preforms can be supplied to the sorting device from the unsorted supply, and the production machine and the sorting device are designed to redundantly transfer preforms to the transport device.

Description

[0001] Container treatment plant for treating containers

[0002] The present invention relates to a container treatment plant for treating containers according to independent claim 1 and to a method for producing containers from preforms using a container treatment plant according to independent claim 14.

[0003] State of the art

[0004] Container processing systems are generally known from the state of the art. Preforms are typically fed into these systems, and in subsequent process steps, the preforms are first formed into containers (e.g., using a blow molding machine) and then, if necessary, further processed, such as filling, sealing, labeling, and / or printing.

[0005] Typically, the production of preforms on the one hand and the molding and further processing of containers from the preforms on the other are separated spatially and temporally. For example, preforms are manufactured in a factory and delivered by truck to a beverage manufacturer, which then molds these preforms into bottles or similar products and fills them with the intended product.

[0006] However, this may require long transport of molded preforms, which is costly, and also requires large quantities of preforms to be kept on hand by the customer to ensure continuous operation. Furthermore, if, for example, certain sterility requirements must be met, the preforms may have to be sterilized at the beverage manufacturer or preform processor, which may be complex.

[0007] Task

[0008] Based on the known state of the art, the technical problem to be solved is to provide a container treatment system that overcomes the aforementioned disadvantages as far as possible and can also be operated reliably.

[0009] This object is achieved according to the invention by the container treatment system according to independent claim 1 and the method for producing containers from preforms according to independent claim 14. Advantageous developments of the invention are covered in the subclaims.

[0010] The container treatment plant according to the invention for treating containers comprises a blow molding machine for producing containers from preforms, a transport device arranged upstream of the blow molding machine for transporting preforms to the blow molding machine, a manufacturing machine, in particular an injection molding machine, for producing preforms, a sorting device and a random supply of preforms, wherein preforms can be fed to the sorting device from the random supply and wherein the manufacturing machine and the sorting device are designed for the redundant transfer of preforms to the transport device.

[0011] According to the invention, any machine suitable for producing preforms can be used as the production machine. In particular, the production machine can be designed as or comprise an injection molding machine. However, other embodiments are also conceivable in which the preforms are produced from a solid and / or partially liquid or liquefied starting material. For example, as an alternative to an injection molding machine, a compression molding machine or injection compression molding machine can also be used as the production machine.

[0012] The redundant transfer of preforms to the transport device is to be understood in particular as meaning that a supply of preforms from the sorting device to the transport device only takes place when a supply of preforms from the production machine is not possible (for example due to maintenance work on the production machine or a fault on the production machine or another interruption in the supply of preforms from the production machine) or vice versa.

[0013] This allows, on the one hand, the production and use of preforms directly in a single system, which can reduce the requirements for transport and preform sterility. On the other hand, it avoids extended downtimes of the container processing system, and in particular the blow molding machine, for example, in the event of a failure of the production machine. The container processing system can be provided with a control unit configured to effect the transfer of preforms from the sorting device to the transport device when no preforms are being transferred from the production machine to the transport device.

[0014] In this embodiment, the supply of preforms from the sorting device to the transport device serves as a fallback position or backup, so that a supply of preforms is ensured even if the manufacturing machine fails, so that the continuous operation of the container treatment plant is guaranteed.

[0015] It can be provided that the production machine and / or the sorting device is designed to accumulate preforms upstream of a transfer point to the transport device. The accumulation of preforms is to be understood as meaning that the preforms are present without any spacing from one another in an area upstream of the transfer point to the transport device. This can be achieved, for example, in a guide rail that is inclined from the sorting device and / or the production machine towards the transport device. This allows the supply of preforms to the transport device to be switched from supply via the production machine to supply via the sorting device or otherwise essentially without any time delay, which minimizes downtimes.

[0016] It can be provided that a switch is arranged upstream of the transport device, which can enable or block the transfer of preforms from the production machine and / or the sorting device to the transport device. The switch can selectively block the transfer of preforms from the production machine or the sorting device to the transport device and / or can be driven mechanically or by an electric motor and can be specifically controlled, for example, via a control unit, to control the supply of preforms to the transport device above the production machine or the sorting device.

[0017] In one embodiment, the container treatment plant further comprises a receptacle, wherein the production machine can feed produced preforms to the receptacle if the transport device cannot transport preforms and / or the blow molding machine cannot produce containers from preforms. Preforms that are produced in the production machine even though their use is not possible at a given time due to a malfunction downstream can thus be reused. It can be provided that the container treatment plant comprises a transfer device for transferring preforms from the receptacle to the supply. This reduces the number of unused preforms and at the same time reduces the number of preforms that have to be fed into the supply, for example from an external production facility, which can have a beneficial effect on the quality of the preforms and thus of the containers produced.

[0018] The sorting device can be provided with an outlet for sorted preforms, which is arranged at a higher level than the outlet for finished preforms of the production machine. From this outlet, the preforms can be transported toward the transport device, for example, suspended from the support ring via a guide rail, which allows for easy accumulation of the preforms before transfer to the transport device.

[0019] In one embodiment, the outlet of the sorting device and / or the outlet of the manufacturing machine can transfer preforms to an inclined conveyor for transferring the preforms to the transport device. This allows the preforms to accumulate solely due to gravity, simplifying the accumulation process.

[0020] It can be provided that the sorting device is arranged at least partially above the production machine and optionally at least partially overlaps with the base area of ​​the production machine. This makes the container processing system more space-saving.

[0021] It can be provided that the sorting device is arranged so as to overlap the production machine such that a common floor area is smaller than the sum of the floor area of ​​the production machine and 1.5 times, 1.2 times, or 1.1 times the difference between the floor area of ​​the sorting device and the floor area of ​​the production machine. This reduces the space requirement, particularly for sorting devices and production machines that have a similar size or floor area.

[0022] The production machine and the sorting device can be arranged non-overlapping and with the smallest possible imaginary footprint in the form of the smallest possible rectangle that completely encloses the sorting device and the production machine. Optionally, the rectangle has a side length that is less than 150%, preferably less than 120%, preferably equal to the maximum dimension of the sorting device and / or the production machine, and / or the rectangle has a side length that is less than 150%, preferably less than 120%, preferably equal to the sum of a dimension of the production machine and a dimension of the sorting device. This embodiment further reduces the space requirement of the container treatment system.

[0023] The distance between the production machine and the sorting device can be less than 10 m, less than 5 m, or less than 2 m. This embodiment reduces the length of transport devices from the production machine and / or the sorting device to the transport device and can contribute to a reduced space requirement of the container processing system.

[0024] The preforms can be transported in the conveyor system in an orderly fashion, either with gaps or with contact. Depending on the further processing of the preforms, for example, in the blow molding machine, transport with gaps or with contact may be advantageous.

[0025] The invention further provides a method for producing containers from preforms using a container processing system according to one of the preceding embodiments, wherein the method comprises transferring preforms from the sorting device to the transport device depending on an operating state of the production machine. This allows for the provision of high-quality containers while simultaneously producing containers from preforms flexibly and continuously.

[0026] The container treatment system may further comprise a receiving device, with the production machine feeding produced preforms to the receiving device when the transport device cannot transport preforms and / or the blow molding machine cannot produce containers from preforms. This avoids interruptions in operation.

[0027] Short description of the characters

[0028] Fig. 1 shows a container treatment plant according to an embodiment

[0029] Fig. 2 shows a schematic side view of a container treatment plant according to an embodiment Fig. 3 shows an embodiment with overlapping arranged production machine and sorting device

[0030] Fig. 4 shows an embodiment with a production machine and sorting device arranged side by side

[0031] Detailed description

[0032] Fig. 1 shows a container processing system 100 according to one embodiment. The container processing system 100 comprises at least one manufacturing machine 101 and a sorting device 102. These can feed preforms 130 to a transport device 104, which can then feed the preforms to a container processing machine 105, in particular a blow molding machine for producing containers from the preforms.

[0033] The transport device 104 can, in principle, be designed as desired and can be realized, for example, as an air conveyor and / or a number of rotating star wheels that can receive preforms 130, for example, suspended from the production machine 101 or the sorting device 102, and feed them to the blow molding machine 105. The blow molding machine 105 can be designed in a known manner and, for example, comprise a rotary machine, on the periphery of which a number of blow molds are arranged, which can receive the preforms and in which the preforms 130 can be formed into containers (such as bottles), for example by applying compressed air and / or stretching with a stretching rod.

[0034] The manufacturing machine 101 can, in principle, be designed in any way for producing preforms and can, for example, comprise a tool (not shown in detail here) which has a number of cavities which can, for example, be arranged in a regular pattern (matrix) and to which preform material can be supplied, for example from a supply 111 of preform material, in order to produce preforms in the cavities. The basic design of a manufacturing machine 101 is known to those skilled in the art. In particular, the manufacturing machine can be designed as an injection molding machine or can comprise an injection molding machine with which preforms can be produced. Alternatively or additionally, the manufacturing machine can also comprise a compression molding machine and / or an injection compression molding machine for producing the preforms or can be designed as such.Such machines are generally known to those skilled in the art. The sorting device 102 can be designed as a roller sorter or disc sorter, as are generally known from the prior art. Any other configuration of a sorting device can also be used, as long as the sorting device is suitable for removing preforms from a preferably randomly arranged supply 121 and feeding them to the transport device 104 with a defined orientation (for example, hanging, so that the opening of the preform faces upward).

[0035] In some embodiments, the manufacturing machine may include an inspection unit 162 that can inspect preforms produced in the manufacturing machine. The inspection unit may, for example, include a camera or other optical sensor, or be configured to measure a transmittance of the preform in at least one region of the preform, in order to, for example, draw conclusions about the quality of the preforms. However, such an inspection unit is not mandatory. The manufacturing machine 101 may be configured to feed preforms to a receiver 106 in the event that further transport of preforms in the transport device 104 is not possible (for example, due to a failure of the transport device 104 and / or the blow molding machine 105).In this receptacle 106, the preforms can, for example, be held in a disordered manner and, alternatively, be fed to the disordered stock 121 via a suitable transfer device of the sorting device 102 or be fed to the stock 121. In this sense, the stock 121 can be at least partially filled by means of the production machine.

[0036] 101 produced preforms are filled which cannot be transferred directly to the transport device 104 after their production.

[0037] According to the invention, it is provided that the manufacturing machine 101 and the sorting device

[0038] 102 are designed such that they can redundantly transfer preforms to the transport device 104. This is to be understood in particular to mean that in the event of a failure of either the production machine or the sorting device and the resulting interruption in the supply of preforms from the failed machine to the transport device 104, the other machine takes over the supply of preforms to the transport device 104. Preferably, but not necessarily, it can be provided that the supply of preforms 130 to the transport device 104 takes place via the production machine 101, so that preforms 130 produced in the production machine are fed directly to the transport device and further processed by the blow molding machine 105.If the manufacturing machine fails, this can be detected, for example, by a control unit (such as a computer with a processor and associated memory as well as programming stored therein) 180 of the container treatment system 100 and the supply of preforms can be switched to the sorting device 102.

[0039] In one embodiment, it can be provided that the production machine 101 and the sorting device 102 can each transfer preforms 130 to the transport device 104 at a transfer point. A switch 103 can be arranged at this transfer point, which enables the supply of preforms 130 from the production machine 101 and the sorting device 102 to the transport device 104. The switch can be designed such that it enables the supply of preforms 130 to the transport device 104 for exactly one of the machines (i.e., either the production machine 101 or the sorting device 102) and simultaneously blocks it for the other machine, so that preforms cannot be transferred from both the production machine and the sorting device to the transport device at the same time.

[0040] The diverter 103 can preferably be controlled by the control unit 180 depending on which of the machines (sorting device or manufacturing machine) is to be used to supply preforms. A removal device or transport device 113 can be provided upstream of the diverter 103, which can remove preforms from an outlet 112 of the manufacturing machine 101 and feed them to the diverter. Similarly, a conveyor device or transport device 123 can be arranged upstream of the diverter 103, which can remove preforms 130 from an outlet 122 of the sorting device 102 and feed them to the diverter 103. In one embodiment, it is provided that the conveyor devices 113 and / or the conveyor device 123 are designed such that they can accumulate preforms in front of the diverter 103. This means, in particular, that the preforms are transported seamlessly in the conveyor devices 113 and 123.By accumulating the preforms 130 in front of the diverter 103, it is ensured, on the one hand, that a continuous flow of preforms without gaps is transferred to the blow molding machine 105 during the production and transport of the preforms by the production machine 101 to the transport device 104. They can be transferred to the blow molding machine 105, for example, using a sawtooth star wheel at a desired pitch. Furthermore, this embodiment has the advantage that, in the event of a failure of the production machine and a switching of the diverter 103, preforms 130 can be directly fed to the transport device 104 from the accumulated preforms 130 in the conveyor device 123 of the transport device 104, without a gap occurring in the flow of preforms. This ensures the continuous operation of the blow molding machine even in the event of a failure of the production machine 101.In this case, switching of the switch 103 can preferably be controlled in such a way that it switches the transport of preforms from the (failed) production machine to the sorting device only when the conveyor device has run empty, so that even after failure of the production machine, a number of preforms produced with the production machine continue to be fed to the transport device 104 before switching of the switch takes place.

[0041] It can be provided that the conveyor device 113 and / or the conveyor device 123 are each designed as a pair of inclined rails which run from the outlet 112 or 122 in the direction of the switch 103, wherein the preforms can be transported between the rails while hanging on their support ring. As a result, the resulting back pressure of the preforms in the respective conveyor device causes the preforms 130 to build up. For this purpose, it can be provided that the outlet 112 of the production machine 101 and / or the outlet 122 of the sorting device 102 is arranged at a higher height than the transport device 104 and / or than the switch 103. The inclination of the conveyor devices 113 and 123 thus results from the distance of the outlets 112 or 122 from the switch orthe transport device 104 and the height level and can be adjusted as required by increasing or decreasing the distance in order to realize a desired back pressure or an intermediate storage capacity of the preforms 130 in the conveyor devices 113 and 123.

[0042] It can also be provided that, although both outlets 112 and 122 are arranged at a higher height than the transport device and / or the switch, the height of one of the outlets is higher than the height of the other outlet. For example, the outlet 112 can be arranged at a lower height relative to the switch 103 and / or the transport device 104 than the outlet 122 of the sorting device.

[0043] In the embodiment shown in Fig. 1, the production machine 101 and the sorting device 102 are arranged next to each other only schematically. However, the arrangement of the production machine 101 and the sorting device 102 relative to each other is not limited to this.

[0044] Fig. 2 shows an embodiment of a container processing plant 200 in which the sorting device 202 is arranged at a height H2, whereas the production machine is arranged at a height H1. The height H1 or H2 indicates either the shortest distance between the production machine 201 and the sorting device 202 and a zero level assumed below the production machine 201 or the distance between the outlets 212 and 214.

[0045] 221 of the manufacturing machine 201 and the sorting device 202 to this zero level.

[0046] The supply 201, from which the starting material for producing the preforms is fed to the production machine 201, can be arranged at the same height level H1. The supply 212 for preforms that can be fed to the sorting device can be arranged at the height level H2. However, this can also be arranged at an even higher height level than the height level H2 (in particular at a higher height level) to ensure easy transfer of preforms from the supply 212 to the sorting device.

[0047] In the embodiment shown, different angles of attack α and β and thus possibly different back pressures for the preforms result for the height levels H1 and H2 for the conveyor devices 213 and 223, respectively, which feed preforms from the outlet 212 and 222, respectively, to the diverter 223. In order to keep the difference in the resulting back pressures of the preforms as small as possible or to keep the back pressures resulting for the preforms in the conveyor device 223 as small as possible, it can be provided that the sorting device 202 is arranged at a greater horizontal distance from the diverter than the production machine 201 (or its respective outlets 212 and 222). Although this increases the length of the conveyor device 223, the angle of attack β is simultaneously reduced. The distance between the outlet 222 and the diverter 203 in the horizontal direction can be selected according to requirements.

[0048] The arrangement of the sorting device 202 at least partially above the production machine 201 is also advantageous with regard to the space required to accommodate the production machine and the sorting device, since these do not necessarily have to be arranged next to each other in a factory hall. Depending on the floor space occupied by the production machine (either with or without supply 211) and the sorting device 202 (either with or without supply 212), the space requirement can be significantly reduced. The floor space here is understood to be the vertical projection of the external dimensions of the production machine 201 or the sorting device 202 onto the horizontal plane.

[0049] Fig. 3 shows an embodiment of the at least partially overlapping arrangements of the sorting device 302 and the production machine 301. Without limiting the generality, it is assumed here that the production machine 301 comprises a base area A1 that is smaller than the base area A2 of the sorting device 302, and that the sorting device 302 is arranged above the production machine 301 (see also the embodiment of Fig. 2). This can be achieved, for example, with the aid of a frame structure (for example made of stainless steel) 250, which can either be connected to the frame of the production machine 201 or can be connected independently thereof to a floor of a factory hall, and on which the sorting device 202 can be arranged.

[0050] In the embodiment shown in Fig. 3, the production machine 301 and the sorting device 302 have a rectangular base area. It is understood that this is merely an example, and any other shaped base areas may also be provided for the production machine 301 and the sorting device 302.

[0051] In the embodiment shown here, the base areas A1 and A2 of the production machine 301 and the sorting device 302 overlap. The transport device 304 is shown only schematically here. The total resulting base area A, which is occupied by the sorting device and the production machine in this arrangement, is thus composed of the base area A2 of the sorting device and the base area A1 of the production machine and, regardless of the base area of ​​the sorting device 302, amounts to at least the amount of the base area A1 of the production machine.

[0052] Depending on the degree of overlap between the base areas A1 and A2, the total base area A is thus the sum of the base area of ​​the production machine and a (not necessarily integer) multiple of the difference between the base area of ​​the production machine and the base area of ​​the sorting device. As mentioned above, without loss of generality, in this embodiment the base area of ​​the production machine is smaller than the base area of ​​the sorting device. If the base area of ​​the production machine lies entirely within the base area of ​​the sorting device (so that the base areas completely overlap), the total area A is equal to the sum of the base area of ​​the production machine and the protruding part of the base area of ​​the sorting device (i.e. the difference between the base area of ​​the sorting device and the base area of ​​the production machine).With complete overlap, this results in the base area of ​​the sorting device, since this has a larger base area A2 than the base area A1 of the sorting device 301.

[0053] If the base areas only partially overlap (as shown here), the total occupied base area is equal to the sum of the base area of ​​the production machine and a multiple of the difference between the base area of ​​the sorting device and the base area of ​​the production machine. If the overlap is not complete (for example because the sorting device has to be moved backwards as seen from the switch in order to realize a necessary angle of attack ß of the conveyor device), the production machine and the sorting device are preferably arranged such that the common base area A is smaller than the sum of the base area of ​​the production machine and 2 times, in particular 1.5 times, preferably 1.2 times and particularly preferably 1.1 times the difference between the base area of ​​the sorting device and the base area of ​​the production machine, A = A1 + c (A2 - A1), with c > 1 as a unitless constant.This allows the container treatment plant to be arranged as compactly as possible.

[0054] Fig. 4 shows an alternative embodiment to Fig. 3, in which the base area of ​​the production machine 401 and the base area of ​​the sorting device 402 are shown only schematically in the form of rectangles. The imaginary base area occupied by the sorting device 402 and the production machine 401 should be understood as rectangle 403, which encloses both the base area of ​​the production machine 401 and the base area of ​​the sorting device 402 and has the smallest area of ​​all rectangles that completely contain both the base area of ​​the production machine and the base area of ​​the sorting device.

[0055] The rectangle has a length L and a width B. For simplified representation, the base area of ​​the sorting device was assumed to be a rectangle with a width B1 and a length L1, and the base area of ​​the sorting device 402 was assumed to be rectangular with a width B2 and a length L2. The base areas of the production machine 401 and the sorting device

[0056] 402 are at least in one direction relative to each other (either along the width B of the rectangle

[0057] 403 and / or along the length L of the rectangle 403) are spaced apart from one another by a distance which, here, for example, runs in the direction B and is designated by D.

[0058] Preferably, the arrangement of the sorting device and the arrangement of the production machine are such that the rectangle 403 has a side length (i.e., either the length L or the width B) that is less than 200%, preferably less than 150%, and particularly preferably less than 120%, and particularly preferably equal to the maximum dimension of the sorting device and / or the production machine in this direction, wherein the side length (e.g., the length L) can be at most equal to the larger of the two lengths L1 and L2. This reduces the area occupied by the sorting device and the production machine.Alternatively or additionally, it can be provided that the distance D is selected by a suitable arrangement of the production machine 401 and the sorting device 402 such that it is as small as possible and a side length (for example, the side length B) of the rectangle 403 is less than 150%, preferably less than 120%, and particularly preferably equal to the sum of the dimensions of the production machine and the sorting device in this direction. If the side length B is equal to the side lengths B1 and B2, the production machine 401 and the sorting device 402 are arranged directly next to one another and thus in a particularly space-saving manner.

[0059] It is understood that such an arrangement can be realized by appropriately designing the conveyor systems and, for example, the diverter. To further save space, the direction of the outlets can also be changed so that they do not run parallel to each other, but can also form an angle with each other. This ultimately depends on the actual footprint and shape of the base area of ​​the production machine and the sorting device.

Claims

Claims 1. Container treatment plant for treating containers, the container treatment plant comprising a blow molding machine for producing containers from preforms, a transport device arranged upstream of the blow molding machine for transporting preforms to the blow molding machine, a manufacturing machine, in particular an injection molding machine, for producing preforms, a sorting device and a random supply of preforms, wherein preforms can be fed to the sorting device from the random supply and wherein the manufacturing machine and the sorting device are designed for the redundant transfer of preforms to the transport device.

2. Container treatment plant according to claim 1, further comprising a control unit which is designed to effect the transfer of preforms from the sorting device to the transport device when no transfer of preforms takes place from the production machine to the transport device.

3. Container treatment plant according to claim 1 or 2, wherein the manufacturing machine and / or the sorting device is designed to accumulate preforms in front of a transfer point to the transport device.

4. Container treatment plant according to one of claims 1 to 3, wherein a switch is arranged upstream of the transport device, which can enable or block a transfer of preforms from the manufacturing machine and / or the sorting device to the transport device.

5. Container treatment plant according to one of claims 1 to 4, further comprising a receptacle, wherein the manufacturing machine can feed manufactured preforms to the receptacle if the transport device cannot transport preforms and / or the blow molding machine cannot produce containers from preforms.

6. Container treatment plant according to claim 5, wherein the container treatment plant comprises a transfer device for transferring preforms from the receptacle to the supply.

7. Container treatment plant according to one of claims 1 to 6, wherein the sorting device comprises an outlet for sorted preforms which is arranged at a higher height level than an outlet for manufactured preforms of the manufacturing machine.

8. Container treatment plant according to claim 7, wherein the outlet of the sorting device and / or the outlet of the manufacturing machine can transfer preforms to an inclined conveyor for transferring the preforms to the transport device.

9. Container treatment plant according to one of claims 1 to 7, wherein the sorting device is arranged at least partially above the production machine and optionally at least partially overlaps with a base area of ​​the production machine.

10. Container treatment plant according to claim 9, wherein the sorting device is arranged to overlap with the production machine such that a common base area is smaller than the sum of the base area of ​​the production machine and 1.5 times or 1.2 times or 1.1 times the difference between the base area of ​​the sorting device and the base area of ​​the production machine.

11. Container treatment plant according to one of claims 1 to 8, wherein the production machine and the sorting device are arranged non-overlapping and with the smallest possible imaginary base area in the form of the smallest possible rectangle that completely encloses the sorting device and the production machine, wherein optionally the rectangle has a side length that is less than 150%, preferably less than 120%, preferably equal to the maximum dimension of the sorting device and / or the production machine and / or wherein the rectangle has a side length that is less than 150%, preferably less than 120%, preferably equal to the sum of a dimension of the production machine and a dimension of the sorting device.

12. Container treatment plant according to one of claims 1 to 8 or 11, wherein a distance between the manufacturing machine and the sorting device is less than 10m or less than 5m or less than 2m.

13. Container treatment plant according to one of claims 1 to 12, wherein the preforms can be transported in the transport device in an orderly manner with gaps or with contact.

14. A method for producing containers from preforms using a container treatment plant according to one of claims 1 to 13, wherein the method comprises transferring preforms from the sorting device to the transport device depending on an operating state of the production machine.

15. The method according to claim 14, wherein the container treatment plant further comprises a receptacle, wherein the manufacturing machine feeds manufactured preforms to the receptacle when the transport device cannot transport preforms and / or the blow molding machine cannot produce containers from preforms.

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