Apparatus for processing a particle-foam material to produce at least one particle-foam moulded part
Patent Information
- Application Number
- EP2023738654
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-07-04
- Filing Date
- 2023-06-30
- Publication Date
- 2025-05-14
Smart Images

Figure 1.1
Abstract
Description
[0001] Device for processing a particle foam material to produce at least one particle foam molded part
[0002] The invention relates to a device for processing a particle foam material to produce at least one particle foam molded part, wherein the device comprises a first mold cavity delimited by one or more walls for producing a first particle foam molded part, to which a first flow channel structure is assigned, at least one second mold cavity delimited by one or more walls for producing a second particle foam molded part, to which a second flow channel structure is assigned, a first supply device for providing a first process fluid, and at least one second supply device for providing a second process fluid.
[0003] Corresponding devices are basically known from the technical field of processing expandable or expandable particle foam materials for producing particle foam molded parts and can sometimes comprise several mold cavities, ie generally several volumes each representing the geometric-constructive design of a particle foam molded part to be produced.
[0004] To date, it has been common practice for the process fluids supplied to the respective mold cavities during the operation of corresponding devices, such as hot steam, cooling water, compressed air, to always be provided via supply devices specifically and separately assigned to the respective mold cavities, such as steam generators or storage tanks, cooling water generators or storage tanks, compressed air generators or storage tanks, etc.
[0005] The resulting plant and process configuration of corresponding devices has therefore been comparatively complex to date. The known devices are therefore in need of improvement or at least further development, particularly with regard to their plant and process configuration.
[0006] Based on this, the invention is based on the object of providing an improved device for processing a particle foam material for producing at least one particle foam molded part.
[0007] The object is achieved by a device having the features of independent claim 1. The dependent claims relate to possible embodiments of the device. A first aspect of the invention relates to a device for processing at least one expandable or expanded particle foam material to produce one or more particle foam molded parts, i.e., for example, technical particle foam components or technical particle foam component groups. The device is therefore generally designed to process expandable or expanded particle foam material (hereinafter referred to as "particle foam material") to produce one or more particle foam molded parts. The device can be a so-called molding machine.
[0008] The particle foam material that can be processed using the device for producing particle foam molded parts typically has a particulate structure prior to processing. The particle foam material that can be processed using the device therefore typically consists of a large number of expandable or expanded plastic particles. Such plastic particles can be unexpanded plastic particles, optionally loaded with a chemical and / or physical blowing agent (residue), pre-expanded plastic particles, optionally loaded with a chemical and / or physical blowing agent (residue), or fully expanded plastic particles, optionally loaded with a chemical and / or physical blowing agent (residue).For both unexpanded and pre-expanded plastic particles, it is typically the case that they are (further) expandable and can therefore be (further) expanded in one expansion process. For fully expanded plastic particles, it is typically the case that they cannot be (further) expanded. Specific examples of particle foam materials or plastic particles that can be processed with the device include, but are not limited to, expandable or expanded polyolefins, such as expandable or expanded polyethylene, expandable or expanded polypropylene, and expandable or expanded polystyrene. In principle, all expandable or expanded thermoplastics, such as E-PA, E-PC, E-PBT, or E-PET, can be considered.
[0009] The device comprises a first mold cavity for producing a first particle foam molded part. The first mold cavity represents a volume that depicts the geometric-structural design of a first particle foam molded part that can be produced or is to be produced by the device. The first mold cavity is delimited by one or more walls. The walls delimiting the first mold cavity can, as explained in more detail below, be assigned to a first mold element of the device.
[0010] The device additionally comprises at least one second or further mold cavity for producing at least one second or further particle foam molded part. The at least one second or further mold cavity represents a volume which depicts the geometric and structural design of at least one second or further particle foam molded part which can be or is to be produced by means of the device. The at least one second or further mold cavity is delimited by one or more walls. The walls delimiting the at least one second mold cavity can, as explained in more detail below, be assigned to at least one second or further mold element of the device. The at least one second or further mold element can be arranged or formed parallel to the first mold element.In the following, reference will generally be made to a “second mold cavity”; however, the corresponding statements in connection with the second mold cavity apply analogously to each mold cavity of the device present in addition to the first mold cavity.
[0011] Due to the fact that the device comprises several separate mold cavities or mold elements, the device can also be referred to or considered as a multi-cavity machine.
[0012] A first flow channel structure is assigned to the first mold cavity. As will become apparent below, the first flow channel structure typically comprises a plurality of flow channels, each through which a process fluid can flow, which are arranged or formed on or in the walls delimiting the first mold cavity.
[0013] In a similar manner, a second flow channel structure is assigned to the second mold cavity. As will become apparent below, the second flow channel structure typically comprises a plurality of flow channels, each through which a process fluid can flow, which are arranged or formed on or in the walls delimiting the second mold cavity.
[0014] Corresponding process fluids can generally be fluid energy carriers. The first process fluid can in particular be a first temperature control medium, in particular a gaseous or liquid one, for controlling the temperature of the first and the at least one second mold cavity to a first temperature level. The first process fluid can specifically be a heating fluid, e.g. in the form of steam or superheated steam. The first process fluid can be pressurized or flow through the respective flow channel structures under pressure. The second process fluid can be a second temperature control medium, in particular a gaseous or liquid one, for controlling the temperature of the first and the at least one second mold cavity to a second temperature level different from the first temperature level. The second process fluid can specifically be a cooling fluid, e.g. in the form of cooling water.The second process fluid can be pressurized or flow through the respective flow channel structures under pressure. At least one further process fluid can be, for example, a pressurized gas, such as compressed air, which can be used, for example, to clean and / or dry the respective mold cavities.
[0015] The device further comprises a first supply device for supplying a first process fluid. The first supply device can, for example, be formed by or comprise a storage device comprising a storage volume for the first process fluid, for example in the form of a reservoir. Alternatively or additionally, the first supply device can, for example, be formed by or comprise a conditioning device for conditioning the or a first process fluid, for example with regard to specific chemical and / or physical target properties, i.e., e.g., a specific chemical composition, a specific state of aggregation, a specific density, a specific pressure, a specific temperature, etc.
[0016] The device further comprises at least one second or further supply device for providing at least one second or further process fluid. The at least one second or further supply device can, for example, be formed by or comprise a storage device comprising a storage volume for the at least one second or further process fluid, for example in the form of a reservoir. Alternatively or additionally, the at least one second or further supply device can, for example, be formed by or comprise a conditioning device for conditioning the or at least one second or further process fluid, for example with regard to certain chemical and / or physical target properties, i.e. a certain chemical composition, a certain state of aggregation, a certain density, a certain pressure, a certain temperature, etc.In the following, reference will generally be made to a “second provision device”; however, the corresponding statements in connection with the second provision device apply analogously to any provision device of the device present in addition to the first provision device.
[0017] A special feature of the device is that the first supply device is connected to the first mold cavity via a supply line forming a first inlet into the first flow channel structure for supplying the first process fluid into the first flow channel structure, and to the at least one second mold cavity via a supply line forming a first inlet into the second flow channel structure for supplying the first process fluid into the second flow channel structure. The supply line into the first flow channel structure communicates in particular with a first flow channel, i.e. in particular a flow channel for the first process fluid, of the first flow channel structure. The supply line into the second flow channel structure communicates in particular with a first flow channel, i.e. in particular a flow channel for the first process fluid, of the second flow channel structure.Between the first supply device and the first flow channel structure there is therefore a fluidic connection via the supply line assigned to the first flow channel structure, which can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection, which makes it possible, in particular if required, to guide the or a first process fluid from the first supply device into the first flow channel structure, ie in particular into a corresponding first flow channel of the first flow channel structure, and optionally further into the first mold cavity. Likewise, between the first supply device and the second flow channel structure there is a fluidic connection via the supply line assigned to the second flow channel structure, which can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection.be formed by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe and / or hose arrangement, a fluidic connection which makes it possible, in particular as required, to guide the or a first process fluid from the first supply device into the second flow channel structure, ie in particular into a corresponding first flow channel of the second flow channel structure, and optionally further into the second mold cavity.
[0018] The first supply device is thus connectable or connected via respective first supply lines both to the first flow channel structure assigned to the first mold cavity, i.e., in particular, to a corresponding first flow channel of the first flow channel structure, and to the flow channel structure assigned to the second mold cavity, i.e., in particular, to a corresponding first flow channel of the second flow channel structure. Thus, the first supply device can be used to supply the first process fluid, or a first process fluid, to both the first mold cavity and the second mold cavity; it is therefore not necessary to assign each mold cavity its own supply device for the first process fluid, or a first process fluid, which simplifies the system or process-related configuration of the device.
[0019] Furthermore, the second supply device is connected to the first mold cavity via a supply line forming a second inlet into the first flow channel structure for supplying the or at least one second process fluid into the first flow channel structure, and to the second mold cavity via a supply line forming a second inlet into the second flow channel structure for supplying the or at least one second process fluid into the second flow channel structure. The supply line into the first flow channel structure communicates in particular with a second flow channel, ie in particular a flow channel for the second process fluid, of the first flow channel structure. The supply line into the second flow channel structure communicates in particular with a second flow channel, ie in particular a flow channel for the second process fluid, of the second flow channel structure.There is therefore a fluidic connection between the second supply device and the first flow channel structure via the supply line assigned to the first flow channel structure, which can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection, which makes it possible, in particular if required, to guide the or at least one second process fluid from the second supply device into the first flow channel structure, ie in particular into a corresponding second flow channel of the first flow channel structure, and optionally further into the first mold cavity. Likewise, there is a fluidic connection between the second supply device and the second flow channel structure via the supply line assigned to the second flow channel structure, which can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection.be formed by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe and / or hose arrangement, a fluidic connection which makes it possible, in particular as required, to guide the or at least one second process fluid from the second supply device into the second flow channel structure, ie in particular into a corresponding second flow channel of the second flow channel structure, and optionally further into the second mold cavity.
[0020] The second supply device is thus connectable or connected via respective supply lines both to the first flow channel structure assigned to the first mold cavity, i.e., in particular, to a corresponding second flow channel of the first flow channel structure, and to the flow channel structure assigned to the second mold cavity, i.e., in particular, to a corresponding second flow channel of the second flow channel structure. Thus, the second supply device can be used to supply the second process fluid, or a second process fluid, to both the first mold cavity and the second mold cavity; it is therefore not necessary to assign each mold cavity its own supply device for the second process fluid, which simplifies the system or process-related configuration of the device.
[0021] The connection between the respective supply lines and the respective flow channel structures can be realized by fluidic connection or connecting elements, such as flange elements, sealing elements, etc., which can optionally be removed (without damage or destruction). The same applies to the connection between the respective flow channel structures and the respective discharge lines explained below. Overall, this provides an improved device for processing a particle foam material to produce at least one particle foam molded part, particularly compared to the prior art mentioned above.
[0022] At least one flow control device, particularly in the form of a valve device, can be assigned to the supply line forming the first inlet into the first flow channel structure. The flow control device can be configured to control or regulate the flow through the supply line and thus the inlet of the first process fluid into the first flow channel structure. In this way, a controllable or adjustable or on-demand supply of the first process fluid into the flow channel structure assigned to the first mold cavity can be realized, which enables very efficient use of the first process fluid.
[0023] Alternatively or additionally, at least one flow control device, in particular in the form of a valve device, can be assigned to the supply line forming the second inlet into the first flow channel structure. The flow control device can be configured to control or regulate the flow through the supply line and thus the inlet of the at least one second process fluid into the first flow channel structure. In this way, a controllable or adjustable or on-demand supply of the second process fluid into the flow channel structure assigned to the first mold cavity can be realized, which enables very efficient use of the second process fluid.
[0024] Analogously, at least one flow control device, in particular in the form of a valve device, can be assigned to the supply line forming the first inlet into the second flow channel structure. The flow control device can be configured to control or regulate the flow through the supply line and thus the inlet of the first process fluid into the second flow channel structure. In this way, a controllable or adjustable or on-demand supply of the first process fluid into the flow channel structure assigned to the second mold cavity can be realized, which enables very efficient use of the first process fluid.
[0025] Alternatively or additionally, at least one flow control device, in particular in the form of a valve device, can be assigned to the supply line forming the second inlet into the second flow channel structure. The flow control device can be configured to control or regulate the flow through the supply line and thus the inlet of the at least one second process fluid into the second flow channel structure. In this way, a controllable or adjustable or on-demand supply of the second process fluid into the flow channel structure assigned to the second mold cavity can be realized, which enables very efficient use of the second process fluid. Respective flow control devices can in particular be designed as or comprise valve devices. In particular, these can be controllable or adjustable valve devices.Corresponding valve devices can comprise at least one valve element movable into multiple orientations and / or positions, wherein each orientation and / or position of the at least one valve element correlates with a specific flow rate of a respective process fluid. Typically, at least one orientation and / or position of the at least one valve element represents a blocking position of the at least one valve element, in which the flow of a respective process fluid is (completely) blocked. Corresponding valve devices can thus be designed as or comprise directional control valves, for example.
[0026] Individual, several, or all of the aforementioned flow control devices can be operated independently or dependently of one another. This particularly includes the interdependent or independent transfer of the respective flow control devices into respective blocking positions, in which they cannot be flowed through by a corresponding process fluid, and into respective unblocking positions, in which they can be flowed through by a corresponding process fluid.
[0027] The first supply line into the first flow channel structure and the first supply line into the second flow channel structure can be connected to a central outflow line from the first supply device. The first supply device can thus have a central outflow line, which, analogous to the supply lines for the first process fluid, can be designed as a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe and / or hose arrangement, which communicates with the respective supply lines for the first process fluid and thus with respective flow channels of the first and second flow channel structures. This can be realized, for example, by the central outflow line of the first supply device branching into respective supply lines or by respective supply lines opening into the central outflow line of the first supply device.
[0028] Alternatively or additionally, the supply line into the first flow channel structure and the supply line into the second flow channel structure can be connected to a central outflow line from the second supply device. The second supply device can thus have a central outflow line, which, analogous to the second supply lines, can be designed as a pipe or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe or hose arrangement, which communicates with the respective second supply lines and thus with respective flow channels of the first and second flow channel structures. This can be achieved, for example, by the central outflow line of the second supply device branching into respective supply lines or by respective supply lines opening into the central outflow line of the second supply device.
[0029] The first supply device, in particular the central outflow line associated therewith, can be assigned at least one flow control device for controlling the outflow of the first process fluid from the first supply device, in particular for controlling or regulating the flow of the first process fluid through the central outflow line associated therewith. The flow control device can be configured to control or regulate the outflow of the first process fluid from the first supply device and thus at least indirectly the inflow of the first process fluid into the first and second flow channel structures. In this way, a controllable or regulatable and thus as needed supply of the first process fluid into the flow channel structures of the first and second mold cavity, ieIn particular, into respective first flow channels, this allows for very efficient use of the first process fluid. Furthermore, applicable safety requirements can be met, as the central outflow line enables simple and rapid separation of the fluidic connection between the first supply device and the flow channel structures of the first and second mold cavities. The flow control device can be a valve device; the above statements apply analogously in connection with valve devices.
[0030] Alternatively or additionally, at least one flow control device for controlling or regulating the outflow of the at least one second process fluid from the at least one second supply device, in particular for controlling the flow of the at least one second process fluid through the central outflow line associated therewith, can be assigned to the second supply device, in particular to the central outflow line associated therewith. The flow control device can be configured to control or regulate the outflow of the second process fluid from the second supply device and thus at least indirectly the inflow of the second process fluid into the first and second flow channel structures. In this way, a controllable or regulatable and thus as needed supply of the second process fluid into the flow channel structures of the first and second mold cavities, ieIn particular, into respective second flow channels, this allows for very efficient use of the second process fluid. Furthermore, applicable safety requirements can be met, as the central outflow line enables simple and rapid separation of the fluidic connection between the second supply device and the flow channel structure of the first and second mold cavities. The flow control device can be a valve device; the above statements apply analogously in connection with valve devices.
[0031] The first mold cavity can be connected to a suction flow generating device, in particular a vacuum generating device such as a pump device, via at least one suction line through which a suction flow can flow. In this way, a suction flow acting in the first mold cavity can be generated, for example, for the purpose of achieving a specific distribution of loose particle foam material in the first mold cavity and / or for the purpose of venting the first mold cavity.
[0032] Analogously, the second mold cavity can be connected to the suction flow generating device, in particular a vacuum generating device such as a pump device, via at least one suction line through which a suction flow can flow. In this way, a suction flow acting in the first mold cavity can be generated, for example, for the purpose of achieving a specific distribution of loose particle foam material in the first mold cavity and / or for the purpose of venting the first mold cavity.
[0033] At least one flow control device, in particular in the form of a valve device, can be assigned to the suction flow generation device(s). The flow control device can be configured to control or regulate the flow through the suction line and thus the suction flow or effect. This enables a controllable and thus demand-based supply of the suction of air from the first and / or second mold cavity. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.
[0034] The first flow channel structure can be connected to a first discharge line forming a first outlet for discharging the first process fluid from the first flow channel structure, i.e. in particular a first flow channel of the first flow channel structure, and to at least one second discharge line forming a second outlet for discharging the at least one second process fluid from the first flow channel structure, i.e. in particular a second flow channel of the first flow channel structure. By means of corresponding first and second outlets, a separate discharge of respective process fluids from the first flow channel structure is possible, which can form the basis for process fluid recycling since the respective process fluids cannot mix. At least one flow control device, in particular in the form of a valve device, can be assigned to the first discharge line forming the first outlet from the first flow channel structure.The flow control device can be configured to control or regulate the flow through the first discharge line and thus the outflow of the first process fluid from the first flow channel structure, i.e., in particular, from the first flow channel of the first flow channel structure. In this way, a controllable and thus as-needed discharge of the first process fluid from the first flow channel structure, i.e., in particular, from the first flow channel of the first flow channel structure, can be realized, which also enables very efficient use of the first process fluid. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.
[0035] Alternatively or additionally, a flow control device, in particular in the form of a valve device, can be assigned to the at least one second discharge line forming the second outlet from the first flow channel structure. The flow control device can be configured to control or regulate the flow through the second discharge line and thus the outflow of the second process fluid from the first flow channel structure, i.e. in particular from the second flow channel of the first flow channel structure. In this way, a controllable or regulatable and thus as-needed discharge of the second process fluid from the first flow channel structure, i.e. in particular from the second flow channel of the first flow channel structure, can be realized, which likewise enables very efficient use of the second process fluid.The flow control device may be a valve device; the above statements in connection with valve devices apply analogously.
[0036] In an analogous manner, the second flow channel structure can be connected to a first discharge line forming a first outlet for discharging the first process fluid from the second flow channel structure, i.e., in particular, a first flow channel of the second flow channel structure, and to at least one second discharge line forming a second outlet for discharging the at least one second process fluid from the second flow channel structure, i.e., in particular, a second flow channel of the second flow channel structure. Corresponding first and second outlets enable separate discharge of respective process fluids from the second flow channel structure, which in turn can form the basis for process fluid recycling, since the respective process fluids cannot mix.
[0037] At least one flow control device, in particular in the form of a valve device, can be assigned to the first discharge line forming the first outlet from the second flow channel structure. The flow control device can be configured to control or regulate the flow through the first discharge line and thus the outflow of the first process fluid from the second flow channel structure, i.e. in particular from the first flow channel of the second flow channel structure. In this way, a controllable or regulatable and thus as-needed discharge of the first process fluid from the second flow channel structure, i.e. in particular from the first flow channel of the second flow channel structure, can be realized, which likewise enables very efficient use of the first process fluid. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.
[0038] Alternatively or additionally, a flow control device, in particular in the form of a valve device, can be assigned to the at least one second discharge line forming the second outlet from the second flow channel structure. The flow control device can be configured to control or regulate the flow through the second discharge line and thus the outflow of the second process fluid from the second flow channel structure, ie in particular from the second flow channel of the second flow channel structure. In this way, a controllable or regulatable and thus as-needed discharge of the second process fluid from the second flow channel structure, ie in particular from the second flow channel of the second flow channel structure, can be realized, which likewise enables very efficient use of the second process fluid.The flow control device may be a valve device; the above statements in connection with valve devices apply analogously.
[0039] The first discharge line forming the first outlet from the first flow channel structure and the at least one second discharge line forming the second outlet from the first flow channel structure can, optionally alternatively or additionally, be connected to or open into a first common discharge line. This enables an efficient principle for discharging or removing several, possibly all, process fluids from the first flow channel structure, i.e., in particular, the respective first and second flow channels of the first flow channel structure.
[0040] At least one flow control device, in particular in the form of a valve device, can be assigned to the first common discharge line. The flow control device can be configured to control or regulate the flow through the first common discharge line and thus the outflow of the first process fluid and the at least one second process fluid through the first common discharge line and thus out of the first flow channel structure. In this way, a controllable or regulatable and thus as-needed discharge of the first process fluid and the second process fluid from the first flow channel structure, ie in particular from the first and second flow channels of the first flow channel structure, can be realized. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.
[0041] In an analogous manner, the first discharge line forming the first outlet from the second flow channel structure and the at least one second discharge line forming the second outlet from the second flow channel structure can be connected to or open into a second common discharge line. This enables an efficient principle for discharging or removing several, possibly all, process fluids from the second flow channel structure, ie, in particular, the respective first and second flow channels of the second flow channel structure.
[0042] At least one flow control device, in particular in the form of a valve device, can be assigned to the second common discharge line. The flow control device can be configured to control or regulate the flow through the second common discharge line and thus the outflow of the first process fluid and the at least one second process fluid through the second common discharge line and thus out of the second flow channel structure. In this way, a controllable or regulatable and thus as-needed discharge of the first process fluid and the second process fluid from the second flow channel structure, ie in particular from the first and second flow channels of the second flow channel structure, can be realized. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.
[0043] The first flow channel structure can, again optionally alternatively or additionally, be connected to a first common discharge line forming a common outlet for the joint discharge of the first and the at least one second process fluid from the first flow channel structure. In this way, an efficient principle for discharging or removing several, possibly all, process fluids from the first flow channel structure, ie in particular respective first and second flow channels of the first flow channel structure, can be enabled. The common discharge line can communicate, in particular directly, with the first flow channel through which the first process fluid can flow and the second flow channel of the first flow channel structure through which the second process fluid can flow.In particular, the common discharge line can be connected to or in a first mold element forming the first mold cavity or encompassing it, so that the mold element requires only one (single) connection for the discharge of respective, i.e. in particular all, process fluids. At least one flow control device, in particular in the form of a valve device, can also be assigned to this common discharge line. The flow control device can be configured to control or regulate the flow through the common discharge line and thus the discharge of the first process fluid and the at least one second process fluid through the common discharge line and thus the discharge of all process fluids from the first flow channel structure. In this way, an on-demand and in particular controllable discharge of the first process fluid and the second process fluid from the first flow channel structure, i.e.in particular, from the first and second flow channels of the first flow channel structure. The flow control device can be a valve device; the above statements apply analogously in connection with valve devices.
[0044] In an analogous manner, the second flow channel structure can, again optionally alternatively or additionally, be connected to a second common discharge line forming a common outlet for the joint discharge of the first and the at least one second process fluid from the second flow channel structure. In this way, an efficient principle for discharging or removing several, possibly all, process fluids from the second flow channel structure, ie in particular respective first and second flow channels of the second flow channel structure, can be enabled. The common discharge line can communicate, in particular directly, with the first flow channel through which the first process fluid can flow and the second flow channel of the second flow channel structure through which the second process fluid can flow.In particular, the common discharge line can be connected to or in a second mold element forming the second mold cavity or encompassing it, so that the mold element requires only one (single) connection for the discharge of respective process fluids, ie in particular all process fluids.
[0045] At least one flow control device, in particular in the form of a valve device, can also be assigned to this common discharge line. The flow control device can be configured to control or regulate the flow through the common discharge line and thus the outflow of the first process fluid and the at least one second process fluid through the common discharge line and thus out of the second flow channel structure. In this way, an on-demand and in particular controllable discharge of the first process fluid and the second process fluid from the second flow channel structure, i.e. in particular from the first and second flow channels of the second flow channel structure, can be realized. The flow control device can be a valve device; the above statements in connection with valve devices apply analogously.From the above explanations regarding the respective flow channel structures of the first and second mold cavities, it is already clear that the first flow channel structure assigned to the first mold cavity typically comprises a plurality of flow channels, and the second flow channel structure assigned to the at least one second mold cavity typically comprises a plurality of flow channels. As also mentioned, respective flow channels can be arranged or formed on or in the walls delimiting the respective mold cavity. Respective flow channels can thus be arranged or formed, in particular, within the walls delimiting the respective mold cavity; the material forming the respective walls can thus surround or enclose the respective flow channels, in particular directly.
[0046] The first flow channel structure assigned to the first mold cavity can thus comprise at least one first flow channel arranged or formed in at least one wall delimiting the first mold cavity, through which a first process fluid can flow, and at least one second or further flow channel arranged or formed in the at least one wall delimiting the first mold cavity, through which a second process fluid can flow. The flow channels of the first flow channel structure can, as will become apparent below, be arranged or formed in parallel, particularly in terms of fluid technology.
[0047] Analogously, the second flow channel structure assigned to the second mold cavity can comprise at least one first flow channel arranged or formed in at least one wall delimiting the at least one second mold cavity, through which a first process fluid can flow, and at least one second or further flow channel arranged or formed in the at least one wall delimiting the at least one second mold cavity, through which a second process fluid can flow. The flow channels of the second flow channel structure can, as will become apparent below, be arranged or formed in parallel, particularly in terms of fluid technology.
[0048] The respective flow channels of the first and / or second flow channel structure can be configured differently in functional and / or constructive terms and thus have different functions in connection with the processing of a
[0049] Particle foam material for the production of a particle foam molded part serve different functions in connection with the processing of a
[0050] Particle foam material for producing a particle foam molded part. In particular, the respective flow channels of the first and / or second flow channel structure can be or can be flowed through by different process fluids, i.e., in particular, process fluids that serve different functions in connection with the processing of a particle foam material for producing a particle foam molded part. The functions assigned to the respective process fluids are determined in particular by their chemical and / or physical properties, such as their state of aggregation, pressure, temperature, etc.
[0051] Consequently, at least one first flow channel of the first and / or second flow channel structure can be or has a first process fluid with first properties flow through it, wherein the at least one first flow channel or the first process fluid performs a first function in connection with the processing of a particle foam material for producing a particle foam molded part, and at least one second or further flow channel of the first and / or second flow channel structure can be or has a second or further process fluid with second or further properties flow through it, wherein the at least one second or further flow channel or the second or further process fluid performs a second or further function in connection with the processing of a particle foam material for producing a particle foam molded part.Further flow channels of the first and / or second flow channel structure can be flowed through or through by respective first and second or further flow medium at least at times simultaneously or at least at times successively.
[0052] Respective first flow channels of the first and / or second flow channel structure can differ from respective second or further flow channels of the first and / or second flow channel structure in that respective first flow channels have at least one flow channel section opening into the first and / or second mold cavity, via which flow channel section a process fluid can flow from the at least one first flow channel into the first and / or second mold cavity. Respective first flow channels thus represent a first type of flow channel, which is characterized in that it has corresponding flow channel sections opening into the respective mold cavity. Respective second or further flow channels thus represent a second type of flow channel, which is characterized in that it does not have corresponding flow channel sections opening into the respective mold cavity.The first and / or second flow channel structure may comprise a plurality of, optionally differently functionalized, flow channels of the first type, and / or a plurality of, optionally differently functionalized, flow channels of the second type.
[0053] In principle, the respective flow channels of the first and second flow channel structures are fluidically separated from one another. For each flow channel structure, there is therefore no fluidic contact between the flow channels of the first and second types, so that it is not possible for a process fluid flowing through a respective flow channel of the first type to mix with a process fluid flowing through a respective flow channel of the second type. Thus, the flow channels of the first and second types of each flow channel structure are fluidically separated from one another, in particular such that a process fluid flowing through a flow channel of the first type cannot come into contact with a process fluid flowing through a flow channel of the second type.Respective flow channels of the first and second types cannot therefore communicate with each other in terms of fluid technology, cannot influence each other in terms of fluid technology, and, as will become apparent below, can be operated separately from each other in different functions. Each flow channel structure can thus be equipped with different functions through a targeted number and / or arrangement of differently functionalized flow channels, i.e., in particular, through a targeted number and / or arrangement of respective flow channels of the first and second types.
[0054] Each flow channel structure can form a temperature control device or a component thereof designed to control the temperature of the respective mold cavity, i.e., generally, to heat and cool the respective mold cavity and thus the particle foam material located therein to be processed to produce a particle foam molded part. A corresponding temperature control device can be operated in at least one heating mode and at least one cooling mode.
[0055] A corresponding temperature control device can be operated in a first heating mode in which the temperature control device is set up to introduce a certain amount of thermal energy into the respective mold cavity or the particulate particle foam material located therein in order to enable a bonding of the particle foam material. Alternatively or additionally, a corresponding temperature control device can be operated in a second heating mode in which the temperature control device is set up to introduce a certain amount of thermal energy into the respective mold cavity or the particulate particle foam material located therein in order to preheat the particle foam material. Further alternatively or additionally, the temperature control device can be operated in a third heating mode in which the temperature control device is set up to introduce a certain amount of thermal energy into the respective mold cavity orto introduce the particle foam material present therein, which has been joined to form a particle foam molded part, in order to reheat the particle foam material. The amount of thermal energy introduced into the particulate particle foam material in the first heating mode is typically higher, possibly significantly higher, than the amount of thermal energy introduced into the particle foam material in the second and / or third heating mode. A corresponding temperature control device can also be operated in a cooling mode, in which a desired amount of thermal energy is removed from the respective mold cavity or from the particle foam molded part produced by joining the particle foam material, in particular in order to enable demolding of the particle foam material.
[0056] The above-described implementation of corresponding heating and cooling modes can be realized specifically, for example, in that the at least one first flow channel of the respective flow channel structure, i.e. generally one or more flow channels of the first type, can be or are flowed through by a, in particular vaporous, heating fluid for heating the respective mold cavity. The at least one second flow channel of the respective flow channel structure, i.e. generally one or more flow channels of the second type, can be or are flowed through by a, in particular liquid, cooling fluid for cooling the respective mold cavity or can be or are flowed through by a, vaporous or liquid, heating fluid for preheating or postheating the respective mold cavity.
[0057] Respective first and second flow channels of a flow channel structure operated as a temperature control device can therefore differ in their function, as respective first flow channels can serve to heat the particle foam material located in the respective mold cavity, in particular in order to connect this to form a particle foam molded part, and can be flowed through by a heating fluid, such as steam or superheated steam, or can be flowed through during operation of the temperature control device, and respective second flow channels can be used to cool the particle foam material located in the respective mold cavity and / or to preheat and / or reheat the particle foam material located in the respective mold cavity and can be flowed through by a cooling fluid, such as water, or can be flowed through during operation of the temperature control device.In addition, respective first and second flow channels can differ structurally for functional reasons, as the respective first flow channels each have at least one flow channel section opening into the respective mold cavity, via which a process fluid, i.e., in particular a heating fluid, can flow from a respective first flow channel into the respective mold cavity. The respective second flow channels, in contrast, typically do not have corresponding flow channel sections via which a process fluid, i.e., in particular a cooling, preheating, or postheating medium, can flow from a respective second flow channel into the respective mold cavity.The heating of a respective mold cavity and thus of the particle foam material located therein can be achieved by flowing a heating fluid through the respective first flow channels and by flowing the heating fluid from the respective flow channels into the mold cavity via respective flow channel sections. Through the arrangement and number of respective first flow channels and flow channel sections, thus through the configuration of the respective flow channel structure, a targeted, uniform or uneven heating of the particle foam material located in the respective mold cavity is possible. Thus, the amount of heating fluid introduced and, consequently, the amount of thermal energy to be introduced into the respective mold cavity can be specifically determined through the arrangement and number of respective first flow channels and flow channel sections.
[0058] As mentioned, the at least one first flow channel can be connected to a first supply device, which can accordingly supply a heating fluid. For this purpose, the supply lines for the first process fluid described above can be provided.
[0059] The cooling of the respective mold cavity and thus of the particle foam material located therein can be achieved by flowing a cooling fluid through the respective second flow channels, thus, in contrast to heating, (purely) convective. Through the arrangement and number of respective second flow channels, and thus through the configuration of the respective flow channel structure, a targeted, uniform or uneven cooling of the particle foam material located in the respective mold cavity can be achieved. Thus, the amount of cooling fluid introduced and, consequently, the amount of thermal energy to be released from the respective mold cavity can be specifically determined through the arrangement and number of respective second flow channels.
[0060] Analogously, the preheating and / or postheating of the particle foam material located in a respective mold cavity can be achieved (purely) convective by flowing a preheating and / or postheating fluid through respective second flow channels. The arrangement and number of respective second flow channels can enable targeted, uniform or uneven preheating and / or postheating of the particle foam material located in the respective mold cavity. Thus, the amount of preheating and / or postheating medium introduced, and thus the amount of thermal energy introduced into the respective mold cavity, can be specifically determined by the arrangement and number of respective second flow channels. The at least one second flow channel can be connected or connectable to a second supply device that provides a cooling, preheating, or postheating fluid.The second supply lines described above can be provided for this purpose.
[0061] The above-described configuration of a temperature control device with respective first and second flow channels arranged or formed in the at least one wall and thus integrated into the at least one wall makes it possible for the respective mold cavities to be assigned a vapor chamber, unlike conventional molds. In known molds, this chamber is arranged behind the walls defining the mold cavity to retain a vaporous heating fluid. This provides advantages not only due to a comparatively significantly more compact design of the device, but also with regard to the efficient operation of the device.
[0062] Each flow channel structure can alternatively or additionally form a component of a gas injection device designed to inject a gas, such as compressed air, into the respective mold cavity. The injection of a gas into a respective mold cavity can, for example, for demolding a particle foam molded part, represent a function of the respective flow channel structure. In this case, a respective first flow channel can be flowed through by a gas to be injected into the mold cavity, for example for demolding a particle foam molded part. Alternatively or additionally, a respective flow channel structure can comprise at least one third flow channel arranged or formed in a wall delimiting the respective mold cavity, which third flow channel can be flowed through by a gas to be injected into the mold cavity, for examplefor demolding a particle foam molded part, and has at least one flow channel section opening into the mold cavity. Due to its configuration with at least one corresponding flow channel section, the at least one third flow channel also represents a flow channel of the first type.
[0063] The at least one first and / or third flow channel can be or can be connected to a supply device that generates or provides a blowing flow. A gas injection device or blower device, e.g., a pump device, can be associated with a corresponding supply device. The first and / or second supply lines described above can be provided for this purpose. Separate third supply lines can also be provided for this purpose.
[0064] Furthermore, alternatively or additionally, each flow channel structure can form a component of a gas extraction device configured to extract a gas from the respective mold cavity. The extraction of gas from a respective mold cavity can, e.g., for distributing and / or compressing particle foam material in the mold cavity, represent a function of the respective flow channel structure. Alternatively or additionally, the extraction of gas from the respective mold cavity for venting the respective mold cavity can represent a function of the respective flow channel structure. In this case, the at least one first flow channel or a corresponding third flow channel can be flowed through by a gas to be extracted from the respective mold cavity, e.g., for distributing and / or compressing particle foam material in the respective mold cavity and / or for venting the respective mold cavity.Alternatively or additionally, the respective flow channel structure can comprise at least one fourth flow channel arranged or formed in a wall delimiting the respective mold cavity, through which a gas to be extracted from the respective mold cavity can flow, e.g., for distributing particle foam material in the respective mold cavity and / or for venting the respective mold cavity, and which has at least one flow channel section opening into the respective mold cavity. Due to its configuration with at least one corresponding flow channel section, the at least one third and / or fourth flow channel also represents a flow channel of the first type. A third and / or fourth flow channel configured accordingly for extracting gas can have smaller dimensions compared to a first and / or second flow channel, i.e.in particular, have a smaller cross-sectional area. The same applies to respective flow channel sections of respective third and / or fourth flow channels opening into the respective mold cavity, which can thus also have smaller dimensions, ie, in particular, a smaller cross-sectional area, than the flow channel sections of respective first flow channels.
[0065] The at least one first and / or third and / or fourth flow channel can be or is connected to a supply device that generates or provides a suction flow. A gas extraction device or suction device, e.g., a pump device, can be associated with a corresponding supply device. The first and / or second supply lines described above can be provided for this purpose. Separate third supply lines can also be provided for this purpose.
[0066] Respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - can run at least partially, optionally completely, in a straight line in at least one spatial plane through at least one wall delimiting the respective mold cavity. This configuration of the flow channels can, due to the comparatively simple geometry, e.g., bring manufacturing and fluid dynamic advantages. Fluid dynamic advantages can have an advantageous effect on the efficiency of the introduction or removal of thermal energy into the respective mold cavity via the process fluid flowing through the respective flow channels, i.e.in particular the heating fluid flowing through the respective first flow channels and / or the cooling, preheating or post-heating fluid flowing through the respective second flow channels and / or the gas flowing through the respective third flow channels and being blown into the respective mold cavity and / or the gas flowing through the respective fourth flow channels and being sucked out of the respective mold cavity.
[0067] Respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - can run at least in sections, optionally completely, bent, curved, or kinked in at least one spatial plane through at least one wall delimiting the respective mold cavity. Specifically, respective first and / or second flow channels - the same applies, if present, to respective third and / or fourth flow channels - can run, for example, in a first spatial plane and in a second spatial plane oriented at an angle, optionally at right angles, to the first spatial plane through at least one wall delimiting the respective mold cavity. In this way, it can be enabled or ensured, for example, that the process fluid flowing through the respective flow channel also flows in spatially differently oriented wall sections and, for example,a corresponding energy input is possible. The respective wall can thus have a first wall section extending in a first spatial plane and at least one further wall section extending in a further spatial plane oriented at an angle, optionally at right angles, to the first spatial plane, wherein the at least one first and / or second flow channel - the same applies, if present, to respective third and / or fourth flow channels - extends through the first wall section and through the at least one further wall section.
[0068] Respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - can run in several spatial planes, in particular with respect to a reference plane of the respective mold cavity, furthermore in particular with respect to a base plane delimiting the respective mold cavity on the bottom, parallel or obliquely inclined, through at least one wall delimiting the respective mold cavity. Consequently, the flow channel (central) axes of at least one first flow channel segment and at least one second flow channel segment of a respective flow channel can be arranged in two parallel or obliquely inclined spatial planes. Such a configuration of the respective flow channels can also enable orIt must be ensured that the process fluid flowing through them flows in spatially differently aligned wall sections and that a corresponding energy input is possible.
[0069] Respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - can have, at least in sections, two flow channel segments, in particular parallel, adjacent to, or one above the other. Thus, a respective flow channel can have, at least in sections, a meandering or shaped course extending in at least one spatial plane. A corresponding meandering or shaped course can, for example, serve to establish a connection to a supply device via at least one flow channel segment. Specifically, a corresponding meandering or shaped course can thus be provided in a wall section of the at least one wall, which has a connection for the first and / or second supply line.
[0070] It is also conceivable for the flow channel (central) axes of different flow channels or types of flow channels of the first and / or second flow channel structure to be arranged or formed in two parallel or obliquely inclined spatial planes. Respective flow channels or types of flow channels can thus be arranged or formed in parallel or obliquely inclined spatial planes, particularly with respect to their respective flow channel (central) axes. In general, respective flow channels or types of flow channels of the first and / or second flow channel structure can thus be arranged or formed in one or more mutually offset spatial planes.
[0071] Respective first and / or second flow channels of a respective flow channel structure – the same applies, if present, to respective third and / or fourth flow channels – can have, at least in sections, a round, rounded or ellipsoidal or oval or angular or polygonal cross-sectional geometry. The cross-sectional geometry of individual, several, or all flow channels can generally be selected with regard to the desired flow properties of the respective process fluid as it flows through the respective flow channel. In this respect, differently dimensioned cross-sectional geometries are also conceivable, particularly along the longitudinal extent of the respective flow channels, for example in order to specifically realize different flow velocities of the flow medium as it flows through the respective flow channel in the manner of a Venturi channel, which in turn can influence, for example, the energy input or output.
[0072] In an analogous manner, individual, several or all flow channel sections of a first flow channel and / or third flow channel and / or fourth flow channel opening into the first and / or second mold cavity can have, at least in sections, a round, rounded or angular cross-sectional geometry. The cross-sectional geometry of the flow channel sections can generally be selected with regard to the desired flow properties of the process fluid as it flows into the first or second mold cavity. In this respect, differently dimensioned cross-sectional geometries are also conceivable, particularly along the longitudinal extent of the respective flow channel section, for example in order to specifically realize different flow velocities of the respective flow medium as it flows into the mold cavity in the manner of a Venturi channel, which in turn can influence, for example, the energy input.
[0073] It is also conceivable for respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - to extend, at least in sections, possibly completely, in a spiral or helical manner through at least one wall delimiting the respective mold cavity. A corresponding spiral or helical course of individual, several, or all flow channels may optionally transport more flow medium per unit volume and thus, for example, introduce or remove more thermal energy into or from the respective mold cavity, which may, for example, influence the efficiency of the heating or cooling mode of the respective flow channel structure.
[0074] It is also conceivable for respective first and / or second flow channels of a respective flow channel structure - the same applies, if present, to respective third and / or fourth flow channels - to extend at least partially, possibly completely, in a helical or helix-like manner through at least one wall delimiting the respective mold cavity, wherein the flow channels form a double-helical or helix-shaped arrangement. The respective helically or helix-shaped flow channels can thus be arranged or formed concentrically but axially offset with respect to a reference axis, so that respective helically or helix-shaped flow channel regions of one flow channel are arranged or formed within the free spaces between respective helically or helix-shaped flow channel regions of another flow channel.In this way, a particularly compact configuration of a respective flow channel structure can be realized, which, when implemented as a tempering device, for example, can enable a more uniform heating and cooling of the respective mold cavity in terms of area.
[0075] With regard to the arrangement of the respective first and / or second flow channels and / or respective third and / or fourth flow channels (if present) of the first and / or second flow channel structure, it can generally be assumed that these are arranged parallel at least in sections. In particular, the flow channel (central) axes of several or all, possibly different, flow channels can be arranged parallel. The distance between respective immediately adjacent flow channels can, for example, be in a range between 1 and 25 mm; the distance between respective first and second flow channels can therefore, for example, B. 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm be.It is conceivable that the distance between all flow channels of a respective flow channel structure is the same or that flow channels have different distances in certain regions; thus, for example, flow channels arranged or formed in a first region of the first and / or second flow channel structure can have a first distance from one another, and flow channels arranged or formed in at least one further region of the first and / or second flow channel structure can have a further distance from one another that is different from the first distance.
[0076] In principle, all configurations of the first and / or second flow channel structure with multiple flow channels can be arranged or configured in an alternating arrangement next to one another. This also allows for a configuration of the first and / or second flow channel structure that, in terms of area, can enable, for example, more uniform heating and cooling of the respective mold cavity.
[0077] Thus, for example, first and second flow channels of the first and / or second flow channel structure can be arranged or formed next to one another in an alternating arrangement, and at least one third and / or fourth flow channel can be arranged or formed in at least one region between at least two immediately adjacent first and second flow channels. Thus, at least one third and / or fourth flow channel can be arranged or formed between individual, several, or all adjacently arranged first and second flow channels of the first and / or second flow channel structure. A corresponding third and / or fourth flow channel can be arranged or formed with its flow channel (central) axis parallel to or offset from the flow channel (central) axis of the first and / or second flow channel.
[0078] Returning to the operation of the first and / or second flow channel structure as a temperature control device, it should be added that these, in particular in addition to respective first and / or second flow channels, which, as described, in particular enable flow-based heating and cooling of the particle foam material located in the respective mold cavity, can further comprise at least one electrical heating element arranged or formed in the at least one wall. The at least one electrical heating element, which can be a heating wire, for example, can serve, for example, to locally introduce additional thermal energy into the mold cavity and thus into the particle foam material located therein. In this way, for example, certain surface properties of the particle foam molded part to be produced or produced can be realized. The at least one electrical heating element can, for example,be arranged or formed in a wall section of the at least one wall laterally delimiting the mold cavity in order to realize certain surface properties in corresponding areas of the particle foam molded part.
[0079] In all embodiments, the device typically comprises a hardware and / or software-implemented control device configured to control the operation of the device, in particular to control the operation of one or more flow control devices. The control device can therefore also be configured, for example, to control the operation of respective flow channel structures as a temperature control device, i.e., in particular, to heat and / or cool the respective mold cavity or the particle foam material and / or particle foam molded part located in the respective mold cavity.
[0080] The control device can therefore be configured, for example, to control the operation of a flow channel structure operated as a temperature control device for heating the particle foam material located in the first and / or second mold cavity depending on or independently of the operation of the flow channel structure operated as a temperature control device for cooling, preheating and / or postheating the particle foam material located in the first and / or second mold cavity.The control device can thus be configured to generate first control information for controlling the operation of the first and / or second flow channel structure as a temperature control device for heating the particle foam material located in the respective mold cavity and, dependently or independently thereof, further control information for controlling the operation of the first and / or second flow channel structure as a temperature control device for cooling, preheating and / or postheating the particle foam material located in the respective mold cavity and to use this as a basis for controlling the operation of the device.Controlling the operation of the device, in which the first and / or second flow channel structure serves as a tempering device for heating the particle foam material located in the respective mold cavity, includes, in particular, controlling at least one parameter of a heating fluid flowing through the at least one first flow channel, in particular a relevant parameter influencing the heating power, such as, for example, the pressure, the temperature, the flow velocity.Control of the operation of the device, in which the first and / or second flow channel structure serves as a tempering device for cooling, preheating or post-heating the particle foam material located in the respective mold cavity, analogously includes, in particular, controlling at least one parameter of a cooling, preheating or post-heating fluid flowing through the at least one second flow channel, in particular a relevant parameter influencing the cooling, preheating or post-heating performance, such as, for example, the pressure, the temperature, the flow velocity.
[0081] In embodiments in which at least one corresponding electrical heating element is present, the control device can be configured, in particular, to control the operation of the temperature control device for heating the particle foam material located in the first and / or second mold cavity and / or the operation of the temperature control device for cooling, preheating, or postheating the particle foam material located in the first and / or second mold cavity depending on or independently of the operation of the at least one electrical heating element. In this way, different temperature control principles can be used in a targeted manner to realize the desired properties of a particle foam molded part to be produced in a respective mold cavity.
[0082] The control device can, in particular, also be configured to control or regulate the operation of respective flow control devices, so that, via a controlled or regulated transfer of the respective flow control devices, at least one process fluid can flow through the respective flow channels as required. By controlling or regulating the operation of respective flow control devices, the pressure level of the respective process fluid(s) can also be adjusted, which, for example, enables a process fluid, such as steam or superheated steam, to flow into the respective flow channel structure at a desired pressure via corresponding openings, e.g., bore- or slot-like openings.
[0083] The device can comprise at least one sensor element assigned to the first and / or second mold cavity, which is configured to detect at least one chemical and / or physical parameter of at least one process fluid flowing through the first and / or second flow channel structure. Such parameters can include, in particular, the pressure, temperature, or flow velocity of the respective process fluid.
[0084] As already mentioned above, a respective mold cavity can be formed by a respective mold element or can be encompassed by such a mold element. The device can therefore comprise a first mold element, which forms the first mold cavity or encompasses it, and at least one second mold element, which forms the second mold cavity or encompasses it. The mold elements can, as mentioned, be arranged or designed in parallel. In particular, the mold elements can be mounted in parallel on a clamping device, ie
[0085] B. a clamping plate, the device may be arranged or formed.
[0086] A corresponding mold element can be designed, for example, as a mold half, a mold insert, or as a slide or core. A corresponding mold insert can be accommodated in a receptacle, e.g., formed by a recess, of a receiving device, which can also form a component of the device. The same applies to corresponding slides or cores.
[0087] A corresponding mold element can be manufactured using an additive manufacturing process, in particular a powder-bed-based additive manufacturing process, such as a selective laser melting process, binder jetting process, etc., i.e., by means of 3D printing. In this way, respective flow channel structures in any configuration, i.e., in particular dimensions, shapes, spatial extensions, or orientations, can be formed directly with a mold element delimiting a respective mold cavity, thus resulting in significant degrees of freedom with regard to design, construction, and production compared to conventional manufacturing processes.
[0088] It was mentioned that the device can generally be designed to produce technical components or component groups. In particular, technical components or component groups with a plate-like or plate-shaped basic shape come into consideration. Furthermore, components or component groups to be installed in a vehicle, in particular a motor vehicle, with a plate-like or plate-shaped basic shape come into consideration. A concrete example of a component or component group that can be produced using the molding tool is a base body of a panel component, i.e. in particular a sun visor component. Corresponding panel components or sun visor components can be produced particularly practically using the molding tool due to the properties of the particle foam material that can be processed with the molding tool.
[0089] A second aspect of the invention relates to a method for processing a particle foam material to produce a particle foam molded part.The method is carried out using a device according to the first aspect of the invention and comprises in particular one, several or all of the following steps: filling the first and / or at least one second mold cavity with a particle foam material to be processed to produce a particle foam molded part, heating the particle foam material located in the first and / or at least one second mold cavity by means of a process fluid flowing through the first and / or second flow channel structure to form a particle foam molded part in the first and / or in the at least one second mold cavity, cooling the particle foam material and / or the particle foam molded part by means of a process fluid flowing through the first and / or second flow channel structure, demolding the respective particle foam molded part from the first and / or the at least one second mold cavity.
[0090] All statements in connection with the molding tool according to the first aspect of the invention apply analogously to the method according to the second aspect of the invention and vice versa.
[0091] The invention is explained using exemplary embodiments in the drawings. In the drawings:
[0092] Fig. 1 - 5 each show schematic diagrams of a device according to an embodiment;
[0093] Fig. 6 - 8 each show schematic diagrams of a molding tool according to an embodiment;
[0094] Fig. 9 - 12 each show representations of a mold according to a further embodiment; and
[0095] Fig. 13 - 16 each show schematic diagrams of a molding tool according to further embodiments.
[0096] Figs. 1-5 each show a schematic diagram of a device 1 according to an exemplary embodiment. The device 1 is generally designed for processing expandable or expanded particle foam material (hereinafter referred to as "particle foam material") to produce one or more particle foam molded parts. The device 1 can be a so-called molding machine.
[0097] Specific, but not exhaustive, examples of particle foam materials that can be processed with device 1 include, but are not limited to, expandable or expanded polyolefins, such as expandable or expanded polyethylene, expandable or expanded polypropylene, and expandable or expanded polystyrene. In principle, all expandable or expanded thermoplastics, such as E-PA, E-PC, E-PBT, or E-PET, are suitable.
[0098] The device 1 comprises a first mold cavity 2 for producing a first particle foam molded part. The first mold cavity 2 represents a volume that depicts the geometric-structural design of a first particle foam molded part that can be produced or is to be produced by means of the device 1. The first mold cavity 2 is delimited by one or more walls 2.1 of a first mold element 2.2 of the device 1. The first mold element 2.2 can be, for example, a mold half or a mold insert of a first mold of the device 1. The first mold element 2.2 can be arranged or formed on a clamping plate 6 of a clamping device of the device 1.
[0099] The device 1 further comprises a second mold cavity 3 for producing at least one second particle foam molded part. The second mold cavity 3 represents a volume that depicts the geometric-structural design of at least one second particle foam molded part that can be produced or is to be produced by means of the device 1. The second mold cavity 3 is delimited by one or more walls 3.1 of a second mold element 3.2 of the device 1. In the second mold element
[0100] 3.2 can be, for example, a mold half or a mold insert of a first mold of the device 1. The second mold element 3.2 can also be arranged or formed on the or a clamping plate 5 of the or a clamping device of the device 1.
[0101] In Figs. 1-5, purely exemplary and thus optional, further mold cavities 4, 5 are shown, to which the above and the following explanations in connection with the first and second mold cavities 2, 3 apply analogously. It can be seen that the mold cavities 2-5 and thus the respective mold elements 2.2-5.2 are arranged parallel to one another in the exemplary embodiments.
[0102] Due to the fact that the device 1 comprises several separate mold cavities 2, 3 or mold elements 2.2, 3.2, the device 1 can also be referred to or considered as a multi-cavity machine.
[0103] The first mold cavity 2 is assigned a first flow channel structure 7, which comprises a plurality of flow channels 7.1 - 7.3, each through which a process fluid can flow, which are arranged or formed on or in the walls 2.1 delimiting the first mold cavity 2. Specifically, the first flow channel structure 7 in the embodiment according to Fig. 1 comprises a first flow channel 7.1 for a first process fluid, a second flow channel 7.2 for a second process fluid, and a third flow channel
[0104] 7.3 for a third process fluid.
[0105] In an analogous manner, the second mold cavity 3 is assigned a second flow channel structure 8, which comprises a plurality of flow channels 8.1-8.3, each through which a process fluid can flow, which are arranged or formed on or in the walls 3.1 delimiting the second mold cavity 3. Specifically, the second flow channel structure 8 in the exemplary embodiment according to Fig. 1 comprises a first flow channel 8.1 for a first process fluid, a second flow channel 8.2 for a second process fluid, and a third flow channel 8.3 for a third process fluid.
[0106] Corresponding process fluids can generally be fluid energy carriers. The first process fluid can in particular be a first temperature control medium, in particular a gaseous or liquid one, for controlling the temperature of the respective mold cavity 2 - 5 or the particle foam material to be processed in the respective mold cavity 2 - 5 to a first temperature level. The first process fluid can specifically be a heating fluid, optionally pressurized, e.g. in the form of steam or superheated steam. The second process fluid can be a second temperature control medium, in particular a gaseous or liquid one, for controlling the temperature of the respective mold cavity 2 - 5 or the particle foam material to be processed in the respective mold cavity 2 - 5 to a second temperature level different from the first temperature level.The second process fluid can specifically be a cooling fluid, possibly pressurized, e.g., in the form of cooling water. The third process fluid can be, for example, a pressurized gas, such as compressed air, which can be used, for example, to clean and / or dry the respective mold cavities 2-5.
[0107] In the exemplary embodiment, the device 1 comprises a first supply device 9 for providing the first process fluid, a second supply device 10 for providing the second process fluid and a third supply device 11 for providing the third process fluid.
[0108] The respective supply devices 9-11 can, for example, be formed by or comprise a storage device comprising a storage volume for the respective process fluid, for example in the form of a reservoir. Alternatively or additionally, the respective supply devices 9-11 can, for example, be formed by or comprise a conditioning device for conditioning the respective process fluid, for example with regard to certain chemical and / or physical target properties, i.e., a certain chemical composition, a certain state of aggregation, a certain density, a certain pressure, a certain temperature, etc.
[0109] From Figs. 1 - 5 it can be seen that the first supply device 9 is connected to the first mold cavity 2 via a supply line 9.1 forming a first inlet into the first flow channel structure 7 for supplying the first process fluid into the first flow channel structure 7, and to the second mold cavity 3 via a supply line 9.2 forming a first inlet into the second flow channel structure 8 for supplying the first process fluid into the second flow channel structure 8. In an analogous manner, the first supply device 9 is connected to the other mold cavities (if present). The supply line forming the first inlet into the first flow channel structure 7 or into the first mold cavity 2
[0110] 9.1 communicates with the first flow channel 7.1 of the first flow channel structure 7 intended for the first process fluid. The first inlet into the second flow channel structure
[0111] 8 or into the second mold cavity 3 communicates with the first flow channel 8.1 of the second flow channel structure 8 provided for the first process fluid. Between the first supply device 9 and the first flow channel structure 7 there is therefore a fluidic connection via the supply line 9.1 assigned to the first flow channel structure 7, which supply line can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection, which makes it possible, in particular if required, to guide the or a first process fluid from the first supply device 9 into the first flow channel structure 7, ie in particular into the first flow channel 7.1 of the first flow channel structure 7, and optionally further into the first mold cavity 2.Likewise, there is a fluidic connection between the first supply device 9 and the second flow channel structure 8 via the supply line 9.2 assigned to the second flow channel structure 8, which can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection, which makes it possible, in particular if required, to guide the second process fluid from the first supply device 9 into the second flow channel structure 8, ie in particular into the first flow channel 8.1 of the second flow channel structure 8, and optionally further into the second mold cavity 3.
[0112] The first supply device 9 is connected via respective first inlets forming supply lines 9.1,
[0113] 9.2 is therefore connectable or connected both to the first flow channel structure 7 assigned to the first mold cavity 2, i.e. in particular to the corresponding first flow channel 7.1 of the first flow channel structure 7, and to the second flow channel structure 8 assigned to the second mold cavity 3, i.e. in particular to the corresponding first flow channel 8.1 of the second flow channel structure 8. Thus, the first process fluid can be provided via the first supply device 9 for both the first mold cavity 2 and the second mold cavity 3; it is therefore not necessary for each mold cavity 2, 3 to have its own supply device.
[0114] 9 for the first process fluid, which simplifies the plant or process engineering configuration of the device 1.
[0115] 1 - 5 it can also be seen that the second supply device 10 is connected to the first mold cavity 2 via a supply line 10.1 forming a second inlet into the first flow channel structure for supplying the second process fluid into the first flow channel structure 7 and to the second mold cavity 3 via a supply line 10.2 forming a second inlet into the second flow channel structure 8 for supplying the second process fluid into the second flow channel structure 8. The supply line 10.1 forming the second inlet into the first flow channel structure 7 or into the first mold cavity 2 communicates with the first flow channel 8.1 of the first flow channel structure 7 provided for the first process fluid. The supply line 10.2 forming the second inlet into the second flow channel structure 8 or into the second mold cavity 3 communicates with the second flow channel 8 provided for the second process fluid.1 of the second flow channel structure 8. Between the second supply device 10 and the first flow channel structure 7 there is therefore a fluidic connection via the supply line 10.1 assigned to the first flow channel structure 7, which supply line can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection, which makes it possible, in particular if required, to guide the or at least one second process fluid from the second supply device 10 into the first flow channel structure 7, ie in particular into the second flow channel 7.2 of the first flow channel structure 7, and optionally further into the first mold cavity 2. Likewise, there is a fluidic connection between the second supply device 10 and the second flow channel structure 8 via the supply line 10.2 assigned to the second flow channel structure 8, which supply line can be formed, for example, by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a connection.be formed by a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe and / or hose arrangement, a fluidic connection which makes it possible, in particular if required, to guide the second process fluid from the second supply device 10 into the second flow channel structure 8, ie in particular into the second flow channel 8.2 of the second flow channel structure 8, and optionally further into the second mold cavity 3.
[0116] The second supply device 10 is thus connectable or connected via supply lines 10.1, 10.2 forming respective second inlets both to the first flow channel structure 7 assigned to the first mold cavity 2, i.e. in particular to the corresponding second flow channel 7.2 of the first flow channel structure 7, and to the second flow channel structure 8 assigned to the second mold cavity 3, i.e. in particular to the corresponding second flow channel 8.2 of the second flow channel structure 8. Thus, the second process fluid can be provided via the second supply device 10 both for the first mold cavity 2 and for the second mold cavity 3; it is therefore not necessary to assign each mold cavity 2, 3 its own supply device 10 for the second process fluid, which simplifies the system or process-related configuration of the device 1. With reference to Fig.1 shows that—as indicated by the supply lines 11.1, 11.2—a corresponding connection can be provided between the third supply device 11 and the flow channel structures 7, 8 associated with the mold cavities 2, 3, i.e., in particular, the respective third flow channels 7.3, 8.3. The above statements apply analogously.
[0117] The connection between the respective supply lines 9.1, 9.2, 10.1, 10.2, 11.1, 11.2 and the respective flow channel structures 7, 8 can be realized by fluidic connection or connecting elements (not shown), such as flange elements, sealing elements, etc., which can be removed (without causing damage or destruction). The same applies to the connection between the respective flow channel structures 7, 8 and the respective discharge lines explained below.
[0118] At least one flow control device 12 can be assigned to each of the supply lines 9.1, 9.2, 10.1, 10.2, 11.1, 11.2 forming the respective first and second inlets into the respective flow channel structures 7, 8. The respective flow control devices 12 are configured to control or regulate the flow through the respective supply line 9.1, 10.1, 9.5 and thus the inlet of the first, second, or third process fluid into the respective flow channel structure 7, 8. In this way, a controllable or adjustable or as-needed supply of the first, second, or third process fluid into the flow channel structure 7, 8 assigned to the respective mold cavity 2, 3 is feasible, which enables very efficient use of the process fluids.
[0119] Respective flow control devices 12 can in particular be designed as or comprise valve devices. In particular, these can be controllable or regulatable valve devices. Corresponding valve devices can comprise at least one valve element (not shown) that can be moved into a plurality of orientations and / or positions, wherein each orientation and / or position of the at least one valve element correlates with a specific flow rate of a respective process fluid. Typically, at least one orientation and / or position of the at least one valve element represents a blocking position of the at least one valve element, in which the flow of a respective process fluid is (completely) blocked. Corresponding valve devices can therefore be designed as or comprise directional control valves, for example.
[0120] Individual, multiple, or all of the aforementioned flow control devices 12 can be operated dependently or independently of one another. This particularly includes a dependent or independent transfer of the respective flow control devices 12 into respective blocking positions, in which they cannot be flowed through by a corresponding process fluid, and into respective unlocking positions, in which they can be flowed through by a corresponding process fluid.
[0121] From Fig. 1 it can also be seen that the respective supply lines 9.1, 9.2 provided for the first process fluid in the respective flow channel structures 7, 8 can be connected to a central outflow line 9.3 from the first supply device 9. The first supply device 9 can therefore have a central outflow line 9.3 which, analogous to the supply lines 9.1, 9.2, can be designed as a pipe and / or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe and / or hose arrangement, which communicates with the respective supply lines 9.1, 9.2 and thus with respective first flow channels 7.1, 8.1 of the first and second flow channel structures 7, 8. This can be done e.g. B. be realized in that the central outflow line 9.3 of the first supply device 9 branches off into respective supply lines 9.1, 9.2 or respective supply lines 9.1, 9.2 into the central outflow line 9.3 of the first supply device 9.
[0122] From Fig. 1 it can also be seen that the respective supply lines 10.1, 10.2 provided for the second process fluid in the respective flow channel structures 7, 8 can also be connected to a central outflow line 10.3 from the second supply device 10. The second supply device 10 can therefore have a central outflow line 10.3 which, analogous to the supply lines 10.1, 10.2, can be designed as a pipe or hose arrangement comprising one or more pipe and / or hose elements or can comprise such a pipe or hose arrangement, which communicates with the respective supply lines 10.1, 10.2 and thus with respective second flow channels 7.2, 9.2 of the first and second flow channel structures 7, 8. This can be done e.g. B. be realized in that the central outflow line 10.3 of the second supply device 10 branches off into respective supply lines 10.1, 10.2 or respective supply lines 10.1, 10.2 flow into the central outlet line 10.3 of the second supply device 10.
[0123] The corresponding central outflow line 11.3 in Fig. 1 again indicates that the same can also apply to the third supply device 11.
[0124] From Fig. 1, it is further apparent that a flow control device 12 can be assigned to each of the central outflow lines 9.3, 10.3, 11.3 for controlling the outflow of the respective process fluid, in particular for controlling or regulating the flow of the respective process fluid through the respective associated central outflow line 9.3, 10.3, 11.3. The respective flow control device 12 can be configured to control or regulate the outflow of the respective process fluid from the respective supply device 9-11 and thus, at least indirectly, the inflow of the respective process fluid into the first and second flow channel structures 7, 8. In this way, a controllable and thus demand-based supply of the respective process fluid into the flow channel structures 7, 8 of the mold cavities 2, 3, ie in particular into the respective flow channels 7.1 - 7.3, 8.1 - 8.3, which enables very efficient use of the process fluids. Furthermore, applicable safety requirements can be met, as the central outlet lines 9.3 - 11.3 enable a simple and rapid separation of the fluid connection between the respective supply devices 9 - 11 and the flow channel structures 7, 8 of the mold cavities 2, 3. The flow control devices 12 can, in turn, be controllable or adjustable valve devices.
[0125] Based on the exemplary embodiment according to Fig. 2, in which only two supply devices 9, 10 are shown by way of example, it can be seen that individual, several, or all mold cavities 2-5 can be connected to a suction flow generation device 13, in particular a vacuum generation device, such as a pump device, via at least one suction line 13.1-13.4 through which a suction flow can flow. In this way, a suction flow acting in the respective mold cavity 2-5 can be generated, for example for the purpose of realizing a specific distribution of loose particle foam material in the respective mold cavity 2-5 and / or for the purpose of venting the respective mold cavity 2-5.
[0126] Based on the exemplary embodiment according to Fig. 2, it is further apparent that at least one flow control device 12, in particular in the form of a valve device, can be assigned to the suction flow generation device(s) 13 (each). The flow control device 12 can be configured to control or regulate the flow through the respective suction line 13.1 - 13.4 and thus the suction flow or effect in the mold cavities 2 - 5. This enables a controllable or adjustable and thus on-demand supply of the suction of air from the mold cavities 2 - 5. The flow control devices 12 can in turn be controllable or adjustable valve devices.
[0127] Returning to Fig. 1, it can be seen that the respective flow channel structures 7, 8 can each be connected to a first outlet 9.3, 9.4 for discharging the first process fluid from the respective first flow channel 7.1, 8.1, and to at least one second outlet 10.3, 10.4 for discharging at least the second process fluid from the respective second flow channel 7.2, 8.2. Appropriate outlets or outlets 9.3, 9.4, 10.3, 10.4 enable separate discharge of the respective process fluids from the flow channel structures 7, 8, which can form the basis for process fluid recycling, since the respective process fluids cannot mix.
[0128] In the exemplary embodiment according to Fig. 1, it is provided that the second and / or third process fluid can be discharged equally via the discharge lines 9.4, 10.4. A variant of this is shown in the exemplary embodiment according to Fig. 3, in which the flow channel structure 7, 8 has its own discharge lines 9.4, 9.5, 10.4, 10.5, 11.4, 11.5 for each process fluid, and the process fluids can thus be discharged completely separately. Specifically, Fig. 3 shows that each flow channel 7.1 - 7.3, 8.1 - 8.3 of each flow channel structure 7, 8 can be connected to a discharge line 9.4, 9.5, 10.4, 10.5, 11.4, 11.5 for the respective process fluid. The corresponding derivatives are also indicated in Fig. 4 for the mold cavities 4, 5 with reference numerals 9.6, 9.7, 10.6, 10.7, 11.6, 11.7.
[0129] Individual, several or all derivatives 9.4, 9.5, 9.6, 9.7, 10.4, 10.5, 10.6, 10.7, 11.4, 11.5,
[0130] 11.6, 11.7 can in turn be assigned flow control devices 12, which are designed to control the flow through the respective discharge line 9.4, 9.5, 9.6, 9.7, 10.4, 10.5, 10.6,
[0131] 10.7, 11.4, 11.5, 11.6, 11.7 and thus the discharge of the respective process fluid from the respective
[0132] Flow channels 7.1 - 7.3, 8.1 - 8.3 of the respective flow channel structure 7, 8. In this way, a controllable and thus required discharge of the process fluids from the flow channel structures 7, 8 is possible.
[0133] Flow control devices 12 can in turn be controllable or adjustable valve devices.
[0134] Based on the exemplary embodiment according to Fig. 4, which in this respect shows an optional addition to the exemplary embodiment according to Fig. 3, it can be seen that corresponding discharge lines 9.4, 10.4, 11.4, 9.5, 10.5, 11.5 from the respective flow channel structures 7, 8 or respective mold cavities 2, 3 can each be connected to a first common discharge line 14.1 - 14.4 or can open into such a line. This enables an efficient principle for discharging or removing several, possibly all, process fluids from the respective flow channel structures 7, 8 of the respective mold cavities 2 - 5.
[0135] Fig. 4 also shows that a flow control device 12 can be assigned to individual, several, or all common discharge lines 14.1 - 14.4, which is configured to control or regulate the flow through the respective common discharge line 14.1 - 14.4 and thus the discharge of the respective process fluid through the respective common discharge line 14.1 - 14.4 and thus out of the respective flow channel structure 7, 8. In this way, a controllable or adjustable and thus as-needed discharge of the process fluids from the respective flow channel structures 7, 8 can be realized. The flow control devices 12 can in turn be controllable or adjustable valve devices.
[0136] Based on the exemplary embodiment according to Fig. 5, it can be seen that the flow channel structures 7, 8 can each be directly connected to a common discharge line 15.1 - 15.4 forming a common outlet for the common discharge of the process fluids. In this way, an efficient principle for discharging or removing several, possibly all, process fluids from the respective flow channel structure 7, 8, i.e. in particular the respective flow channels 7.1 - 7.3, 8.1 - 8.3 of the respective flow channel structure 7, 8, can be enabled. The common discharge lines 15.1 - 15.4 can communicate directly with the respective flow channels 7.1 - 7.3, 8.1 - 8.3 of the respective flow channel structure 7, 8. It can be seen that the common leads 15.1 - 15.4 can be connected to or in a mold element 2.1 - 2.5 forming the respective mold cavity 2 - 5 or encompassing it, so that the respective mold element 2.1 - 2.5 requires only one (single) connection for the discharge of all process fluids.
[0137] Fig. 5 also shows that individual, several, or all common discharge lines 15.1-15.4 can in turn be assigned a flow control device 12, which is configured to control or regulate the flow through the respective common discharge line 15.1-15.4 and thus the discharge of all process fluids from the respective flow channel structure 7, 8. In this way, an on-demand and, in particular, controllable discharge of the process fluids from the respective flow channel structure 7, 8 can be realized. The flow control devices 12 can in turn be controllable or regulatable valve devices.
[0138] Figs. 6-8 each show schematic diagrams of an embodiment of a molding tool 10 for processing an expandable or expanded particle foam material to produce a particle foam molded part, which can form a component of a device 1 as described in connection with Figs. 1-5. A concrete configuration of the or a corresponding molding tool 10 is shown in Figs. 9-12.
[0139] 6 - 8 that the molding tool 10 comprises a molding tool element 20 which has at least one wall 2.1 which delimits a molding tool cavity 3 of the molding tool 10 at least in sections, if appropriate completely. In the schematic representations according to Figs. 6 - 8, a corresponding wall 2.1 of a molding tool 10 is shown in a sectional view only because this is initially relevant for the purposes of explaining the principle described below. The or one wall 2.1 can, as can be seen from Figs. 9 - 12, be formed by one or more wall sections or comprise such sections which extend in one or more spatial planes or directions. The or one wall 2.1 can, as can also be seen from Figs. 9 - 12, therefore, for example, have a U-shaped cross-sectional geometry and thus one or more walls extending in a first spatial plane or direction.-direction and one or more second wall sections extending in a second spatial plane or direction that is different from the first spatial plane or direction, e.g., at right angles to the first spatial plane or direction, wherein corresponding first wall sections can define a bottom wall and corresponding second wall sections can define side walls of the mold element 20. The mold element 20 can thus have a trough-like or -shaped configuration.
[0140] The molding tool 10 further comprises a temperature control device 40, which is generally configured for temperature control of the molding tool cavity 3, i.e., generally for heating and cooling the molding tool cavity 3. In particular, the temperature control device 40 is configured, during operation of the molding tool 10, in a heating mode to introduce a desired amount of thermal energy into the molding tool cavity 3 or the particulate particle foam material located therein, in particular to enable bonding of the particle foam material, and in a cooling mode to remove a desired amount of thermal energy from the molding tool cavity 3 or from the particle foam molded part produced by bonding the particle foam molded part, in particular to enable demolding of the particle foam material.
[0141] The temperature control device 40 is formed by first flow channels 4.1 and a plurality of second flow channels 4.2 or comprises a plurality of first flow channels 4.1 and a plurality of second flow channels 4.2, which, as shown by way of example in Figs. 6 - 9, are each arranged or formed in the wall 2.1.
[0142] A heating fluid, in particular a vaporous one, can flow through the first flow channels 4.1 for heating the mold cavity 3, wherein the first flow channels 4.1 each have a plurality of flow channel sections 4.1.1 opening into the mold cavity 3, via which a heating fluid can flow from the respective first flow channels into the mold cavity 3. It can be seen from Figs. 9-12 that respective flow channel sections 4.1.1 can be arranged or configured distributed along the longitudinal axis or extension of the respective first flow channels 4.1.
[0143] The second flow channels 4.1 can each be flowed through by a cooling medium, in particular a liquid one, for cooling the mold cavity 3. From Figs. 6 - 8 it can be seen that the first and second flow channels 4.1, 4.2 differ initially in their function, as the first flow channels 4.1 serve to heat the mold cavity 3 and can be flowed through by a heating fluid, such as steam or superheated steam, or are or are flowed through during operation of the temperature control device 40, and the second flow channels 4.2 serve to cool the mold cavity 3 and can be flowed through by a cooling medium, such as water, or are or are flowed through during operation of the temperature control device 40. In addition, the first and second flow channels 4.1, 4.2 differ in terms of their function, as the first flow channels 4.1 each have several flow channel sections 4.1 opening into the mold cavity 3.1, through which a heating fluid can flow from the respective first flow channels 4.1 into the mold cavity 3. The second flow channels 4.2, on the other hand, do not have corresponding flow channel sections through which a cooling medium can flow from the respective second flow channels 4.2 into the mold cavity 3.
[0144] The heating of the mold cavity 3 can thus be achieved by a heating fluid flowing through the first flow channels 4.1 and by the heating fluid flowing from the respective flow channels 4.1 via respective flow channel sections 4.1.1 into the mold cavity 3. Through the arrangement and number of respective first flow channels 4.1 and flow channel sections 4.1.1, a targeted, uniform or uneven heating of the mold cavity 3 can be achieved. Thus, the amount of heating fluid introduced and, consequently, the amount of thermal energy to be introduced into the mold cavity 3 can be specifically determined through the arrangement and number of respective first flow channels 4.1 and flow channel sections 4.1.1.
[0145] Cooling of the mold cavity 3 can be achieved by flowing a cooling medium through the second flow channels 4.2, thus, in contrast to heating, being (purely) convective. Through the arrangement and number of respective second flow channels 4.2, targeted, uniform or non-uniform cooling of the mold cavity 3 can be achieved. Thus, the amount of cooling medium introduced and, consequently, the amount of thermal energy to be extracted from the mold cavity can be specifically determined by the arrangement and number of respective second flow channels 4.2.
[0146] Figs. 6 - 8 show that there is no fluidic contact between the first and second flow channels 4.1, 4.2, so that it is not possible for a heating fluid flowing through a respective first flow channel 4.1 to mix with a cooling medium flowing through a respective second flow channel 4.2. Consequently, the first and second flow channels 4.1, 4.2 are fluidically separated from one another, in particular such that a heating fluid flowing through a respective first flow channel 4.1 cannot come into contact with a cooling medium flowing through a respective second flow channel 4.2. Therefore, the respective first and second flow channels 4.1, 4.2 cannot influence one another fluidically and, as can be seen in the second figure, can be operated separately from one another for heating and cooling the mold cavity 3.
[0147] The configuration of the temperature control device 40 shown in Figs. 6-8, with respective first and second flow channels 4.1, 4.2 arranged or formed entirely in or within the wall 2.1 and thus completely integrated into the wall 2.1, allows the mold 1, unlike conventional molds, to have no vapor chamber, which in known molds is arranged behind the walls defining the mold cavity in order to retain a vaporous heating fluid. This provides not only advantages due to a comparatively significantly more compact design of the mold 1 but also advantages with regard to the efficient operation of the mold 1.
[0148] 6 - 8 show, by way of example and not exhaustively, different configuration options for the first and second flow channels 4.1, 4.2, which in Fig. 6 are arranged alternately in a common plane and in Fig. 7 are arranged alternately in the vertical direction (z-direction) and are thus arranged or formed at least in sections in two planes. In Figs. 1, 2, the first and second flow channels 4.1, 4.2 each have, by way of example, a round or rounded cross-sectional geometry. The flow channel sections 4.1.1 which open into the mold cavity 3 from the respective first flow channels 4.1 typically have a fixed cross-sectional geometry and can, as Figs. 6 - 8 show by way of example, be designed as hollow cylinders.
[0149] Fig. 8 shows a purely schematic embodiment in which the first and second flow channels 4.1, 4.2 have a circular segment-shaped, i.e. in particular semicircular, cross-sectional geometry. The adjacent arrangement of the first and second flow channels 4.1, 4.2 is intended to indicate that both the respective first flow channels and the respective second flow channels can each run helically or spirally wound through the wall 2.1, wherein the first and second flow channels 4.1, 4.2 can form a double-helix-like or spiral-shaped arrangement, in particular in pairs. The respective helically or spirally wound first and second flow channels 4.1, 4.2 can thus be arranged or formed concentrically but axially offset with respect to a reference axis (e.g. the y-axis), so that the helically or spirally wound flow channel sections of a respective second flow channel 4.2 are arranged or formed within the free spaces between the helically wound flow channel sections of a respective first flow channel 4.1. This allows for a particularly compact configuration of the temperature control device 40, which, in terms of area, can also enable more uniform heating and cooling of the mold cavity 3.
[0150] As mentioned, a concrete configuration of a molding tool element 20 designed as a molding tool insert of an embodiment of a molding tool 10 of a device 1 is shown in Figs. 9 - 12. Fig. 9 shows a partially transparent plan view of the molding tool element 20, Fig. 10 a sectional view through the molding tool element 20 according to the section lines - X, Fig. 11 a sectional view through the molding tool element 20 according to the section lines XI - XI and Fig. 12 a sectional view through the molding tool element 20 according to the section lines XII - XII.
[0151] Based on the top view of the mold element 20 shown as an example arranged on a clamping plate according to Fig. 9, the already mentioned alternating parallel arrangement of respective first and second flow channels 4.1, 4.2 is initially apparent.
[0152] In addition, Fig. 9 shows that the molding tool element 20 can comprise a plurality of channel-like or -shaped distributor sections or regions 80.1, 80.2 assigned to the first flow channels 4.1, via which a heating fluid can flow into the molding tool element 20 and further into the first flow channels 4.1 or out of the first flow channels 4.1 and further out of the molding tool element 20. In the exemplary embodiment, a first distributor section or region 80.1 is assigned to the first flow channels 4.1, which forms an inlet for a heating fluid via a connection 90.1, and a second distributor section or region 80.2 is assigned to the first flow channels 4.1, which forms a return for the heating fluid via a connection 90.2. Respective first and second distributor sections or regions 80.1, 80.2 can be arranged or formed at or in the region of different free ends of the first flow channels 4.1. Accordingly, the first flow channels 4.1 with a respective first end open into the first distributor section or area 80.1 or communicate with it and with respective second ends open into the second distributor section or area 80.2 or communicate with it (see also the sectional view according to Fig. 11).
[0153] Corresponding connections 90.1, 90.2 can be connectable or connected to a heating fluid supply device (not shown) providing a heating fluid, i.e., for example, a container containing a heating fluid. The connection between the first flow channels 4.1 and the heating fluid supply device can thus be realized with the interposition of the distributor sections or regions 80.1, 80.2, so that a heating fluid can flow from the heating fluid supply device first into the one distributor section or region 80.1 and then into the first flow channels 4.1.
[0154] In addition, Fig. 9 shows that the mold element 20 can comprise a plurality of channel-like or channel-shaped distributor sections or regions 100.1, 100.2 assigned to the second flow channels 4.2, via which a cooling medium can flow into the mold element 2 and further into the second flow channels 4.2, or from the second flow channels 4.2 and further out of the mold element 2. In the exemplary embodiment, a first distributor section or region 100.1 is assigned to the second flow channels 4.2, which forms an inlet for a cooling medium via a connection 110.1, and a second distributor section or region 100.2 is assigned to the second flow channels 4.2, which forms a return for the cooling medium via a connection 110.2. Respective first and second distributor sections or regions
[0155] 100.1, 100.2 can be arranged or formed at or in the region of different free ends of the second flow channels 4.2. Accordingly, the second flow channels 4.2 can open into the first distribution section or region 100.1 with a respective first end or communicate with it, and open into the second distribution section or region 100.2 with respective second ends or communicate with it.
[0156] Corresponding connections 110.1, 110.2 can be connectable or connected to a cooling medium supply device (not shown) providing a cooling medium, i.e., for example, a container containing a cooling medium. The connection between the second flow channels 4.2 and the cooling medium supply device can thus be realized with the interposition of the distributor sections or regions 100.1, 100.2, so that a cooling medium can flow from the cooling medium supply device first into one distributor section or region 100.1 and then into the second flow channels 4.2.
[0157] Based on the sectional views according to Figs. 9 - 12, it is again evident, analogous to Fig. 6, that the first and second flow channels 4.1, 4.2 can run straight in a spatial plane through the wall 2.1. This configuration of the first and second flow channels
[0158] 4.1, 4.2 can, for example, offer manufacturing and flow-related advantages due to their comparatively simple geometry. Flow-related advantages can have a beneficial effect on the efficiency of the introduction or removal of thermal energy into or from the mold cavity 3 via the heating or cooling medium flowing through the first or second flow channels 4.1, 4.2.
[0159] From the sectional view according to Fig. 9, it is further evident that the first flow channels 4.1—the same applies to the second flow channels 4.2—can extend through the wall 2.1, at least in sections, in at least one spatial plane. Specifically, it is shown by way of example that the first flow channels 4.1 can extend through the wall 2.1 in a first spatial plane as well as in a second spatial plane oriented (essentially) at right angles to the first spatial plane. In this way, the exemplary embodiment enables or ensures that the heating fluid flowing through the first flow channels 4.1 also flows in spatially differently oriented wall sections of the wall 2.1 of the mold element 20, and a corresponding energy input is possible. The wall 2.In the exemplary embodiment, 1 comprises a first wall section extending in a first spatial plane and two second wall sections extending in a second spatial plane oriented (essentially) at right angles to the first spatial plane, wherein the flow channels extend through both the first wall section and the second wall sections. As mentioned, the same applies to the second flow channels 4.2.
[0160] Returning to Fig. 10, it should be added that a support structure 70 can be assigned to the wall 2.1, which supports the wall 2.1. The support structure 70 is arranged or formed on the surface of the wall 2.1 facing away from the mold cavity 3 and can be formed by one or more, e.g., linear or planar, support elements 70.1 or can comprise such elements that extend in one or more spatial planes or directions. The support structure 70 can thus have a grid-like or grid-like configuration.
[0161] Not shown in the figures, but nevertheless conceivable, is that the temperature control device 40, in addition to respective first and second flow channels 4.1, 4.2, which, as described, enable flow-based heating and cooling of the mold cavity 3, can have at least one electrical heating element arranged or formed in the wall 2.1. The at least one electrical heating element, which can be a heating wire, for example, can serve, for example, to introduce additional thermal energy into the mold cavity 3 and thus into the particle foam material located therein in a locally targeted manner. In this way, for example, certain surface properties of the particle foam molded part to be produced or produced can be realized. The at least one electrical heating element can thus be arranged, for example, in a wall section of the wall 2 that laterally delimits the mold cavity 3.1 may be arranged or designed to realize certain surface properties in corresponding areas of the particle foam molded part.
[0162] In all exemplary embodiments, the device 1 or the mold 10 is typically assigned a control device implemented in hardware and / or software for controlling the operation of the temperature control device 40. The control device is particularly configured to control the operation of the temperature control device 40 for heating the mold cavity 3 dependently or independently of the operation of the temperature control device 4 for cooling the mold cavity 3. The control device can thus be configured to generate first control information for controlling the operation of the temperature control device 40 for heating the mold cavity 3 and, dependently or independently therefrom, second control information for controlling the operation of the temperature control device 40 for cooling the mold cavity 3, and to use the control of the operation of the temperature control device 40 as a basis.Controlling the operation of the temperature control device 40 for heating the mold cavity 3 includes, in particular, controlling at least one parameter of a heating fluid flowing through the first flow channels, in particular a relevant parameter influencing the heating performance, such as, for example, the pressure, the temperature, the flow rate. Similarly, controlling the operation of the temperature control device 40 for cooling the mold cavity 3 includes, in particular, controlling at least one parameter of a cooling medium flowing through the second flow channels 4.2, in particular a relevant parameter influencing the cooling performance, such as, for example, the pressure, the temperature, the flow rate.
[0163] The molding tool element 2.1 can comprise at least one sensor element (not shown) configured to detect at least one parameter influencing the heating performance of the heating fluid or of a heating fluid flowing through the first flow channels 4.1 and / or at least one sensor element (not shown) configured to detect at least one parameter influencing the cooling performance of the cooling medium or of a cooling medium flowing through the second flow channels 4.2. Such parameters can include, in particular, the pressure, temperature, or flow velocity of the heating or cooling medium.
[0164] In embodiments in which the temperature control device 4 additionally comprises at least one corresponding electrical heating element, the control device can be configured, in particular, to control the operation of the temperature control device 4 for heating and / or cooling the mold cavity 3 dependently or independently of the operation of the at least one electrical heating element. In this way, the different heating principles can be used in a targeted manner to realize the desired properties of a particle foam molded part to be produced.
[0165] 1 - 5, the control device can also be configured to control or regulate the operation of respective flow control devices 12, so that a controlled or regulated transfer of the respective flow control devices 12 enables at least one process fluid to flow through the respective flow channels 7.1 - 7.3, 8.1 - 8.3 of the respective flow channel structures 7, 8 as required. By controlling or regulating the operation of respective flow control devices 12, the pressure level of the respective process fluid(s) can also be adjusted, which makes it possible, for example, for a process fluid, such as steam or superheated steam, to flow at a desired pressure via corresponding, for examplehole- or slot-like openings into the respective flow channel structure 7, 8 and thus into the respective mold cavity 2 - 5.
[0166] For all embodiments, it further applies that the mold element 2.1 can be manufactured using an additive manufacturing process, in particular a powder-bed-based additive manufacturing process, such as a selective laser melting process, binder jetting process, etc., thus using 3D printing. In this way, the first and second flow channels 4.1, 4.2 can be formed in any desired configuration directly with the mold element 2.1, resulting in significant degrees of freedom with regard to design, construction, and production compared to conventional manufacturing processes.
[0167] The device 1 is generally designed for producing technical components or component groups. In particular, technical components or component groups with a plate-like or plate-shaped basic shape are considered. Furthermore, in particular, components or component groups to be installed in a vehicle, in particular a motor vehicle, with a plate-like or plate-shaped basic shape are suitable. A concrete example of a component or component group that can be produced by means of the device 1 is a base body of a panel component, i.e. in particular a sun visor component. Corresponding panel components or sun visor components can be produced particularly practically with the device 1 due to the properties of the particle foam material that can be processed with the device 1.
[0168] The mold shown in the figures allows a method for processing a particle foam material to produce a particle foam molded part. The method is carried out using a device according to the first aspect of the invention and comprises, in particular, one, several, or all of the following steps: filling the first and / or at least one second mold cavity 2-5 with a particle foam material to be processed to produce a particle foam molded part, heating the particle foam material located in the first and / or at least one second mold cavity 2-5 by means of a process fluid flowing through the first and / or the at least one second flow channel structure 7, 8, thereby forming a particle foam molded part in the first and / or in the at least one second mold cavity,Cooling the particle foam material and / or the particle foam molded part by means of a process fluid flowing through the first and / or second flow channel structure 7, 8, demolding the respective particle foam molded part from the first and / or the at least one second mold cavity 2 - 5.,
[0169] Individual, multiple or all features described in connection with one embodiment can be combined with individual, multiple or all features described in connection with at least one further embodiment.
Claims
PATENTED SPEAKS 1. Device (1) for processing a particle foam material to produce at least one particle foam molded part, comprising: - a first mold cavity (2) delimited by one or more walls for producing a first particle foam molded part, to which a first flow channel structure (7) is assigned, - at least one second mold cavity (3) delimited by one or more walls for producing a second particle foam molded part, to which a second flow channel structure (8) is assigned, - a first supply device (9) for providing a first process fluid, - at least one second supply device (10) for supplying at least one second process fluid, wherein the first supply device (8) is connected to the first mold cavity (2) via a supply line (9.1) forming a first inlet into the first flow channel structure (7) for supplying the first process fluid into the first flow channel structure (7), and is connected to the at least one second mold cavity (3) via a supply line (9.2) forming a first inlet into the second flow channel structure (8) for supplying the first process fluid into the second flow channel structure (8), and the at least one second supply device (10) is connected to the first mold cavity (2) via a supply line (9.1) forming a first inlet into the first flow channel structure (7) for supplying the first process fluid into the first flow channel structure (7), and1) for supplying the at least one second process fluid into the first flow channel structure (7) with the first mold cavity (2) and via a supply line (10.2) forming a second inlet into the second flow channel structure (8) for supplying the at least one second process fluid into the second flow channel structure (8) with the at least one second mold cavity (3).
2. Device according to claim 1, wherein the supply line forming the first inlet into the first flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first supply line and thus the inlet of the first process fluid into the first flow channel structure, and / or wherein the second supply line forming the second inlet into the first flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the supply line and thus the inlet of the at least one second process fluid into the first flow channel structure;and / or wherein the supply line forming the first inlet into the second flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first supply line and thus the inlet of the first; Process fluid into the second flow channel structure, and / or wherein the second supply line forming the second inlet into the second flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the supply line and thus the inlet of the at least one second process fluid into the second flow channel structure.
3. The device according to claim 1 or 2, wherein the first supply line into the first flow channel structure and the first supply line into the second flow channel structure are connected to a central outflow line from the first supply device; and / or wherein the supply line for the second process fluid into the first flow channel structure and the supply line for the second process fluid into the second flow channel structure are connected to a central outflow line from the at least one second supply device.
4. Device according to claim 3, wherein the first supply device, in particular the central outflow line associated therewith, is assigned a flow control device for controlling the outflow of the first process fluid from the first supply device, in particular for controlling the flow of the first process fluid through the central outflow line associated therewith; and / or wherein the at least one second supply device, in particular the central outflow line associated therewith, is assigned a flow control device for controlling the outflow of the at least one second process fluid from the at least one second supply device, in particular for controlling the flow of the at least one second process fluid through the central outflow line associated therewith.
5. Device according to one of the preceding claims, wherein the first mold cavity is connected to a suction flow generating device, in particular a vacuum generating device, via at least one suction line through which a suction flow can flow; and / or wherein the at least one second mold cavity is connected to a suction flow generating device, in particular a vacuum generating device, via at least one suction line through which a suction flow can flow. pump 6. Device according to one of the preceding claims, wherein the first flow channel structure is provided with a first discharge line forming a first outlet for discharging the first process fluid from the first flow channel structure and with at least one second outlet forming a second outlet for discharging the at least one second process fluid from the first flow channel structure, and / or wherein the second flow channel structure is connected to a first outlet forming a first outlet for discharging the first process fluid from the second flow channel structure and to at least one second outlet forming a second outlet for discharging the at least one second process fluid from the second flow channel structure.
7. Device according to claim 6, wherein the first discharge line forming the first discharge from the first flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first discharge line and thus the discharge of the first process fluid from the first flow channel structure, and / or wherein the at least one second discharge line forming the second discharge from the first flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the at least one second discharge line and thus the discharge of the at least one second process fluid from the first flow channel structure;and / or wherein the first discharge line forming the first discharge from the second flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first discharge line and thus the discharge of the first process fluid from the second flow channel structure, and / or wherein the at least one second discharge line forming the second discharge from the second flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the at least one second discharge line and thus the discharge of the at least one second process fluid from the second flow channel structure.; 8. The device according to claim 6 or 7, wherein the first discharge line forming the first outlet from the first flow channel structure and the at least one second discharge line forming the second outlet from the first flow channel structure are connected to a first common discharge line or open into such a first common discharge line; and / or the first discharge line forming the first outlet from the second flow channel structure and the at least one second discharge line forming the second outlet from the second flow channel structure are connected to a second common discharge line or open into such a second common discharge line.
9. Device according to claim 8, wherein the first common discharge line is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first common discharge line and thus the To control the flow of the first process fluid and the at least one second process fluid through the first common discharge line; and / or wherein the at least one second common discharge line is assigned a flow control device, in particular in the form of a valve device, which is configured to control the flow through the at least one second common discharge line and thus the flow of the first process fluid and the at least one second process fluid through the at least one second common discharge line.
10. Device according to one of the preceding claims, wherein the first flow channel structure is connected to a first common discharge line forming a common outlet for the joint discharge of the first and the at least one second process fluid from the first flow channel structure; and / or the second flow channel structure is connected to a second common discharge line forming a second common outlet for the joint discharge of the first and the at least one second process fluid from the second flow channel structure.
11. Device according to claim 10, wherein the first common discharge line forming the first common discharge from the first flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the first common discharge line and thus the discharge of the first and the at least one second process fluid from the first flow channel structure, and / or wherein the second common discharge line forming the second common discharge from the second flow channel structure is assigned a flow control device, in particular in the form of a valve device, which is designed to control the flow through the second common discharge line and thus the discharge of the first and the at least one second process fluid from the second flow channel structure.
12. Device according to one of the preceding claims, wherein the first flow channel structure (7) assigned to the first mold cavity (2) comprises one or more flow channels (7.1 - 7.3), and / or wherein the second flow channel structure (8) assigned to the at least one second mold cavity (3) comprises one or more flow channels (8.1 - 8.3).
13. Device according to claim 12, wherein the first flow channel structure assigned to the first mold cavity comprises at least one first flow channel (4.1) arranged or formed in at least one wall (2.1) delimiting the first mold cavity, through which a first process fluid can flow, and at least one second flow channel (4.1) arranged or formed in the at least one wall delimiting the first mold cavity arranged or formed second flow channel through which a second process fluid can flow; and / or the second flow channel structure assigned to the at least one second mold cavity comprises at least one first flow channel (4.1) arranged or formed in at least one wall (2.1) delimiting the at least one second mold cavity, through which a first process fluid can flow, and at least one second flow channel arranged or formed in the at least one wall delimiting the at least one second mold cavity, through which a second process fluid can flow.
14. The device according to claim 13 or 14, wherein respective flow channels of the first flow channel structure are fluidically separated from one another; and / or wherein respective flow channels of the first flow channel structure are fluidically separated from one another.
15. Device according to one of the preceding claims, further comprising a control device which is arranged to control the operation of the device, in particular to control the operation of one or more flow control devices.
16. The device according to claim 15, further comprising at least one sensor element assigned to the first mold cavity, which is configured to detect at least one chemical and / or physical parameter of the first process fluid flowing through the first flow channel structure and / or of the at least one second process fluid flowing through the first flow channel structure; and / or at least one sensor element assigned to the at least one second mold cavity, which is configured to detect at least one chemical and / or physical parameter of the first process fluid flowing through the second flow channel structure and / or of the at least one second process fluid flowing through the second flow channel structure.
17. Device according to one of the preceding claims, comprising a first mold element which forms or comprises the first mold cavity, and at least one second mold element which forms or comprises the second mold cavity.
18. The device according to claim 17, wherein the first mold element is designed as a mold insert or comprises such a mold insert, and / or wherein the at least one second mold element is designed as a mold insert or comprises such a mold insert.
19. Device according to one of the preceding claims, wherein the first and the at least one second mold cavity (2, 3) are arranged or formed in parallel.
20. Device according to one of the preceding claims, wherein the first process fluid is a, in particular gaseous, first temperature control medium for controlling the temperature of the first and the at least one second mold cavity to a first temperature level, and / or the at least one second process fluid is a, in particular gaseous, first temperature control medium for controlling the temperature of the first and the at least one second mold cavity to a second temperature level different from the first temperature level.