EP4356054A2 - Trocknungsvorrichtung zur trocknung von behältereinheiten und verfahren - Google Patents
Trocknungsvorrichtung zur trocknung von behältereinheiten und verfahrenInfo
- Publication number
- EP4356054A2 EP4356054A2 EP22733173.3A EP22733173A EP4356054A2 EP 4356054 A2 EP4356054 A2 EP 4356054A2 EP 22733173 A EP22733173 A EP 22733173A EP 4356054 A2 EP4356054 A2 EP 4356054A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- unit
- fluid flow
- drying
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001035 drying Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims description 17
- 239000012530 fluid Substances 0.000 claims abstract description 186
- 239000002904 solvent Substances 0.000 claims description 36
- 238000001816 cooling Methods 0.000 claims description 19
- 230000006641 stabilisation Effects 0.000 claims description 16
- 238000011105 stabilization Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract 1
- 230000032258 transport Effects 0.000 description 23
- 239000003973 paint Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- 238000001739 density measurement Methods 0.000 description 7
- 238000007639 printing Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 235000013361 beverage Nutrition 0.000 description 4
- 239000012809 cooling fluid Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/122—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate
- F26B15/128—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate the rods being attached at one end to an endless conveying means, the other end being free to receive hollow articles, e.g. cans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/20—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all vertical or steeply inclined
- F26B15/22—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all vertical or steeply inclined the objects or batches of materials being carried by endless belts the objects or batches of material being carried by trays or holders supported by endless belts or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
Definitions
- Drying device for drying container units and method
- the invention relates to a drying device and a method for drying container units, in particular cans, for example beverage cans.
- Drying devices in particular pin ovens and continuous drying ovens, also referred to as internal bake ovens (IBO), are known in principle.
- Container units such as cans for beverages, often have a coating on an outer surface, which is designed as a coating of lacquer or paint.
- a coating can, for example, show the brand name of the provider, instructions for use or other content.
- the inner surfaces of the cans are usually coated in a process step after the pin oven and then dried in the continuous drying oven.
- paints are used that relate to the manufacturing process of the can.
- the cans are provided with such a lacquer on an underside of the can in order to adjust the slidability of the cans on the different conveyor belts.
- a device for applying such a coating to container units is also referred to as a printing device.
- this coating In order for this coating to remain stable, it usually has to be cured after it has been applied. Pin furnaces, for example, are used for this curing of the coating, in which the coating is convectively heated, dried, cured and/or baked.
- Pin ovens usually have a conveyor unit.
- the conveyor unit can be a chain conveyor which has transport pins arranged at a distance from one another along its main extension direction.
- the container units are positioned using the transport pins.
- the transport pins protrude into the container units, which are open at one end.
- pin ovens In order to enable the aforesaid drying of the coating, pin ovens usually have fans which supply the different sections within the pin oven with an air flow. High fluid flow conversions are required, particularly in a furnace unit in which the container units are heated to approximately 180 degrees.
- pin stoves In order to meet the increasing ecological requirements and increasing sustainability criteria, the energy consumption of pin stoves must be reduced. Another disadvantage of known pin ovens is that electronic transmission of relevant information regarding can density and paint type is considered unsafe. Therefore, a minimum amount of exhaust air or a minimum exhaust air flow in combination with a maximum solvent entry for the pin furnace must be defined.
- the object is achieved by a drying device, in particular a pin oven, for drying
- Container units in particular of cans, comprising a conveyor unit, in particular with transport pins, wherein the conveyor unit is designed to convey the container units along a drying path, a fluid flow device which is designed to act on the container units at least in sections along the drying path with a fluid flow, and a with the Fluid flow device signal-coupled control device, which is set up to adjust the fluid flow device as a function of a container property of the container units substantially steplessly in order to apply the fluid flow to the container units having a predefined fluid flow property.
- the invention is based on the finding that the known settings of fluid flow devices with, for example, three to five stages do not allows energy-efficient use of drying devices, since no fluid flow that meets the requirements can be set with these. Furthermore, the inventors have found that coupling the adjustment of the fluid flow devices with container properties enables efficient control of the drying device. In particular, depending on kinetic, material-specific and/or geometric container properties, an advantageous control can be made possible, which leads to better resource efficiency. For example, such a
- Drying device characterized by lower generation of carbon dioxide.
- the fluid flow device can be controlled by the controller depending on the container property, in particular in such a way that an exhaust air flow and/or a circulating air flow of the drying device is adjusted in such a way that on the one hand the legal and container-specific requirements are met and on the other hand a minimal energy consumption of the fluid flow device is ensured.
- the solvent input into the drying device can be used as a control parameter and not primarily the frequently used one
- the invention thus enables an energy-efficient drying device, so that the container units produced with such a drying device, for example beverage cans, also have an optimized ecological footprint.
- the drying device can be, for example, a pin oven or a continuous drying oven (IBO).
- IBO continuous drying oven
- the invention is described below using a pin furnace.
- the features, properties and advantages described apply analogously to the drying device in general and to the continuous drying oven in particular.
- the container units are intended in particular for storing food, in particular liquid food. It can be, for example, cans, in particular beverage cans.
- the container units can be made of steel or aluminum, for example, or can include these materials. Furthermore, composite materials for the Conceivable container units.
- the container units usually have a cylindrical lateral surface that can be closed at their front ends.
- the container units can be a deep-drawn component that is open at one end after the deep-drawing process and can be closed there with an openable closure.
- the pin oven includes in particular the conveyor unit with transport pins.
- the conveyor unit can be a chain, for example.
- the conveyor unit is in particular coupled to a drive unit so that it can be moved along the drying section.
- the transport pins are preferably arranged at a distance from one another on the conveyor unit.
- the transport pins are in particular arranged and designed on the conveyor unit in order to position container units, in particular cans, on these, so that the container units can be moved in a substantially stable position along the drying path.
- the pin oven also includes the fluid flow device, which is designed to apply a fluid flow to the container units at least in sections along the drying section.
- the fluid flow device can have two or more fluid flow units, which each provide a fluid flow at least in sections along the drying section.
- the fluid flow device is designed in particular to introduce a supply air flow from the surroundings of the pin furnace into the pin furnace, in particular into a furnace space, and to lead an exhaust air flow out of the pin furnace, in particular out of the furnace space.
- the fluid flow device can generate a circulating air flow within the pin oven, in particular within the oven space.
- the fluid flow device can be designed as a fan, for example. It is particularly preferred that the fluid flow device has two or more or a plurality of fans.
- the pin oven also includes the controller signally coupled to the fluid flow device.
- the control device is set up to adjust the fluid flow device essentially steplessly depending on a container property of the container units. Adjusting the fluid flow device relates in particular to adjusting a predefined fluid flow characteristic.
- the fluid flow property can be, for example, a fluid pressure, which is specified in bar, for example, and/or a fluid volume flow, which can be specified in cubic meters per hour, for example.
- Different fluid flow characteristics may be relevant in different sections of the pin furnace.
- it is a goal to apply a specific fluid pressure to the outer bottom of the tray units to ensure secure positioning of the tray units on the transport pins.
- one goal within the furnace chamber is to set a specific fluid volume flow.
- the container property can be a conveying speed, a container unit density, a length, a diameter, a wall thickness, a paint composition, a paint and/or solvent quantity of the container unit.
- the fluid flow device is set essentially steplessly by means of the control device as a function of the container property.
- Substantially continuously means in particular substantially continuously.
- Substantially stepless can also mean that the fluid flow device is not adjusted discretely.
- Substantially stepless can also mean that a set fluid flow, for example measured in volume per unit of time, deviates by less than 10%, less than 5% or less than 2.5% from a predefined fluid flow, for example specified in volume per unit of time.
- substantially infinitely variable can mean that the fluid flow device is adjustable with more than 10 levels, more than 20 levels or more than 100 levels.
- substantially stepless can mean that a step distance between two consecutive steps is less than 10% of a setting range of the fluid flow device, less than 5% of the
- the fluid flow device is adjusted such that the fluid flow has a predefined fluid flow characteristic.
- the fluid flow property can be, for example, a fluid pressure and/or a fluid volume provided per unit of time.
- the energy consumption for the fluid flow device is reduced by means of a fluid flow device to be set in this way, since the distance between an energy-optimal setting and an adjustable setting is small.
- energy consumption for example gas consumption or electricity consumption, can be reduced for the heating furnace since optimized drying is made possible by means of the fluid flow. Furthermore, this reduces the effort for the exhaust gas aftertreatment, so that the energy required for this is reduced.
- the pin oven comprises a heating unit, preferably the aforesaid gas burner, arranged and adapted to heat the fluid flow in the oven cavity such that the container units are heated to a predetermined temperature for a predetermined time.
- the predetermined temperature can be more than 180 degrees Celsius, for example.
- the predetermined time can be at least 0.5 seconds, for example, preferably at least 1 second.
- the bin property is a kinematic bin property.
- the bin property is a kinematic bin property.
- Container property indicates a conveying speed at which the conveying unit promotes the container units. Furthermore, it is preferable that the container property is a container unit density, which indicates a carried number of container units per unit time.
- the container unit density describes in particular the number of container units entering the pin furnace and/or conveyed through the pin furnace per unit of time. For example, the container unit density can be 2,500 container units per minute.
- a preferred embodiment variant of the pin oven includes a density measuring unit, which is set up to record the container unit density. It is preferred that the density measurement unit is set up, a the
- the density measuring unit has two or has more density measurement sensors for redundantly detecting the container unit density.
- the density measurement unit can be a counting unit, for example.
- the density measuring unit preferably includes one, two or more optical sensors, for example light barriers, inductance sensors, color sensors and/or infrared sensors.
- the density measuring unit can have inductance sensors, capacitance sensors, magnetic sensors and/or proximity sensors, for example ultrasonic sensors.
- the density measurement sensors can be designed as such.
- the density measuring unit can have a camera or a line control.
- a further preferred embodiment of the pin furnace is characterized in that it comprises a fluid flow measuring unit for detecting the exhaust air stream exiting the pin furnace, in particular from the furnace chamber, with the fluid flow measuring unit preferably having two or more
- Fluid flow measuring sensors for redundantly detecting the exhaust air flow exiting from the pin oven, in particular the oven chamber.
- the fluid flow device is or comprises a fluid flow unit of a furnace chamber.
- a fluid flow unit is designed in particular to form the supply air flow and the exhaust air flow into and out of the furnace chamber.
- the pin oven has the density measuring unit and the fluid flow measuring unit, each of which is designed to measure redundantly.
- the safety regulations of some regions can be met without a fixed minimum exhaust air volume having to be guaranteed.
- This also enables a reliable method of measuring the solvent concentration in the furnace chamber, as required by the EN1539 standard, for example. As a result, it can be refrained from specifying a minimum exhaust air volume and a maximum solvent input for the pin furnace. It is therefore sufficient to have a maximum solvent entry per can and a maximum Set container unit density of the pin oven to set a minimum exhaust air flow.
- the pin oven includes a speed measuring unit that is set up to detect the conveying speed.
- the speed measuring unit is preferably set up to generate and/or provide a speed signal characterizing the conveying speed.
- the speed measuring unit can have a light barrier and/or an induction sensor, for example. It is particularly preferred that the speed measuring unit has a light barrier and an induction sensor in order to enable redundant detection of the conveying speed.
- Another preferred embodiment variant of the pin furnace is characterized in that the control device is set up to adjust the fluid flow device based on the density signal and/or the speed signal. For example, the greater the container unit density, the greater the solvent input into the pin furnace.
- a larger fluid flow is usually required to ensure the drying of the coating of the container units.
- Another preferred embodiment of the pin furnace is characterized in that the control device is set up to continuously adjust the fluid flow device in such a way that a predefined fluid pressure and/or a delivered fluid volume per unit of time can be provided.
- the control device is set up to adjust the fluid flow device as a function of at least one container property of the container units.
- the container properties describe, for example, a length, a diameter, a wall thickness, a quantity of paint and/or solvent, a type of paint, a paint composition and/or a paint density.
- the fluid flow to be set depends, among other things, on the nature of the container units. For example, container units with a large wall thickness have a different heating curve than container units with a small wall thickness.
- the length of the container units can also be a container property to consider, since the effect of the
- Fluid flow to the different areas of a long container unit is different than on a short container unit.
- Fluid flow property is set.
- the required energy expenditure can be further reduced.
- a preferred development of the pin oven is characterized in that it comprises a condition measuring device which is arranged and designed to record the at least one container condition, with the at least one container condition preferably being a lateral surface of the container units, with the control device being set up based on a solvent input to be determined on the recorded container quality and the recorded container unit density. It is preferred that the condition measuring device is arranged and designed to generate and/or provide a condition signal characterizing the container condition. The control device is set up in particular to receive and process the condition signal and to determine the solvent input on the basis of the condition signal.
- the quality measuring device can be arranged and designed, for example, to detect a color of the container units. Based on a Color for container units can be inferred from their amount of solvent. With information characterizing the color of a container unit, the control device can, for example, determine the solvent input per container unit. In addition, the control device can determine the solvent input, taking into account the container unit density.
- the introduction of solvent is to be understood in particular in relation to a unit of time.
- the condition measuring device is arranged in particular in a pre-drying frame of the pin oven.
- the minimum exhaust air volume or a minimum exhaust air flow mentioned at the outset is usually determined on the basis of a maximum container size, for example 500 ml, a maximum paint quantity per container unit and a maximum container unit density, for example 2,500 container units per minute. This minimum exhaust air flow must not be fallen below. The minimum exhaust air flow reduces the possibility of adjusting the fluid flow device in an energy-optimal manner.
- the invention is also based on the knowledge that the minimum exhaust air flow can be designed to be variable if the container size, the amount of paint per container and/or the container unit density can be reliably determined. For example, when the container size is reliably determined, the minimum exhaust air flow can be reduced, since the actual size and, for example, not the aforementioned maximum container size is to be used.
- the control device is set up to determine a minimum exhaust air flow, taking into account a determined entry of solvent. It is preferred that the control device is set up to determine the solvent entry based on a container unit size, a solvent quantity per container unit and/or the container unit density. If there is no reliable measured value for one of these parameters, a maximum value is used for this. Furthermore, it is preferred that the control device controls the fluid flow device in such a way that the fluid flow device transports the minimum exhaust air flow out of the pin oven, in particular the oven chamber. Furthermore, the Control device may be set up to take into account a safety factor when determining the exhaust air flow, so that the exhaust air flow to be set is greater than the minimum exhaust air flow.
- the container unit size can be determined, for example, based on the lateral surface.
- the solvent input can be determined, for example, as a function of the unit density of the container, the surface area and the amount of solvent, in particular the weight per volume, and can be specified in weight per time. On the basis of such a determination, the amount of solvent actually introduced per unit of time is taken into account, so that it is not necessary to measure the amount of solvent in the air.
- control device is set up to adjust the fluid flow device depending on a power output of the heating unit.
- the lower the solvent entry the lower the exhaust air flow. This results in less supply air and recirculation air, so there is less energy loss.
- a lower output of the heating unit in particular a lower output of the burner, is required, so that the flow of exhaust air can be reduced.
- a further preferred development of the pin oven is characterized in that it comprises a fluid inlet unit for admitting an inlet air flow into the pin oven, with the control device being signal-coupled to the fluid inlet unit and set up to control the fluid inlet unit in such a way that the inlet air flow entering the pin oven is Essentially corresponds to the exhaust air flow emerging from the pin oven.
- Controlling the fluid inlet unit in this way avoids significant amounts of fluid flow entering or exiting through a tank unit inlet and tank unit outlet.
- the fluid flow within the pin furnace can thus be controlled in a targeted manner.
- the fluid inlet unit can be controlled and/or regulated in particular by the control device.
- the fact that the supply air flow entering the pin oven essentially corresponds to the exhaust air flow exiting from the pin oven means in particular that the incoming fluid flow and the exiting Fluid flows differ by no more than 10%, no more than 20% or no more than 30%.
- a further preferred embodiment of the pin furnace is characterized in that it comprises a furnace chamber for applying a heated fluid to the container units, the fluid flow device comprising a circulating air fluid unit which is arranged and designed to circulate fluid within the furnace chamber.
- the furnace space may be the aforementioned furnace space.
- a differential pressure of the air circulating unit in particular in a flow direction of the fluid before and after the air circulating fluid unit, is determined.
- the differential pressure can be based, for example, on a measured pressure in a flow direction of the fluid before the forced air fluid unit and a measured pressure in a flow direction of the fluid after the forced air fluid unit.
- the control device is also preferably set up to detect a material deposit when the differential pressure changes at a reference speed of the circulating air fluid unit and a reference temperature.
- the reference speed and the reference temperature can essentially be chosen arbitrarily. It is crucial that the differential pressure remains essentially constant at the same speed and the same temperature without material deposits, so that material deposits can be inferred if the differential pressure changes.
- the exhaust air flow is in particular the fluid flow emerging from the furnace space, for example caused by the previously mentioned fluid flow unit of the furnace space.
- the control device is preferably set up to output a warning signal when a fault is detected.
- the furnace chamber is designed in particular to heat the fluid in such a way that the container units are heated to a temperature of at least 180 degrees Celsius for at least a predetermined period of time, in particular a short period of time, for example 0.5 seconds or 1 second.
- a further preferred variant of the pin oven is characterized in that it has at least two signals connected to the control device coupled temperature sensors, which are set up to detect a container temperature of the container units along the drying section within the oven space, wherein the control device is set up to determine a temperature profile of the container units along the drying section.
- the pin oven includes a plurality of temperature sensors.
- the temperature sensors can be infrared sensors, for example.
- a further preferred embodiment of the pin furnace is characterized in that the fluid flow device includes or is a stabilization unit designed to stabilize the container units, wherein the
- Stabilization unit can be adjusted by the control device in such a way that the container units are stabilized on the transport pins depending on the container property.
- the stabilization unit can act in sections or completely along the drying path.
- the stabilization unit is arranged and designed to direct the fluid flow onto the bottoms of the container units, so that these are pressed onto the transport pins.
- the adjustment of the stabilization unit as a function of the container properties is advantageous, for example, in that less contact pressure is required at low conveying speeds than at high conveying speeds. Consequently, energy costs of the stabilization unit can be reduced.
- a further preferred development of the pin furnace is characterized in that the fluid flow device comprises or is a cooling unit designed for cooling the container units, the cooling unit being adjustable by the control device such that the container units are cooled depending on the container properties.
- the cooling unit is designed in particular by the discharge of the fluid flow for cooling the container units.
- the cooling unit is arranged and designed to apply a fluid flow to the container units, so that the container units are cooled.
- the control device is preferably set up to control the cooling unit as a function of the container unit density and/or the conveying speed. For example, a dwell time of the container units in the cooling unit is longer when the conveying speed is lower, so that they are subjected to a fluid flow over a longer period of time. As a result, the fluid flow can be throttled to bring about the same temperature of the tank units at the exit of the refrigeration unit.
- one or more temperature measuring sensors are arranged at the outlet of the cooling unit for measuring a temperature of the container units and the control device is set up to control the fluid flow device based on the temperature of the container units.
- the pin furnace has a condensate separator.
- the condensate separator is arranged within a circulating air system of the pin furnace.
- the condensate separator can be arranged in a pipeline downstream of the exhaust air purification system.
- the condensate separator it is preferable for the condensate separator to be coupled in terms of signaling to the control device and for the control device to be set up to control the condensate separator depending on the container properties of the container units.
- the fluid flow device comprises or is a container removal unit designed for removing the container units from the transport pins, the container removal unit being adjustable by the control device based on the container properties.
- the container removal unit generates a negative pressure in order to remove the container units from the transport pins.
- the container removal unit removes the container units in particular shortly before a radius, so that the radius of the container removal unit, the mass of the container units and the conveying speed in the area of the container removal unit are relevant container properties. It is preferred that the individual units or components of the fluid flow device are arranged in a defined sequence along the drying path. It is preferred that the stabilization unit is arranged at the beginning of the drying section, adjacent to a printing device. A tank unit bottom coater is preferably arranged downstream of the stabilization unit. The furnace chamber with the fluid flow unit and the circulating air fluid unit is preferably arranged further downstream. Further downstream, it is preferable that the cooling unit is arranged to cool the tank units heated in the furnace room. The container removal unit is preferably arranged further downstream from the cooling unit.
- the object mentioned at the beginning is achieved by a method for drying container units, in particular cans, comprising the steps: conveying the container units with transport pins along a drying section, subjecting the container units to at least sections along the drying section with a fluid flow, essentially continuously Adjusting the fluid flow depending on a tank property of the tank units.
- the method comprises one, two or more of the following steps: detecting a container unit density, detecting a conveying speed, adjusting the fluid flow device based on the container unit density and/or the conveying speed, setting a predefined fluid pressure and/or a conveyed fluid volume per time unit, adjusting the fluid flow depending on at least one container property of the container units, detecting at least one container property, determining a solvent entry based on the detected container property and the container unit density, adjusting the fluid flow based on the solvent entry such that a predefined solvent entry is not substantially exceeded, controlling an incoming fluid flow in such a way that it essentially corresponds to an exiting fluid flow, detecting an exiting fluid flow, circulating fluid within a furnace chamber, detecting a material deposit depending on the container property, in particular the conveying speed, the container property, and an exhaust air fluid volume, detecting a container temperature of the container units along the drying section within the oven space, determining a temperature profile of the
- Container units along the drying section stabilizing the container units depending on the container property on the
- Transport pins cooling the container units as a function of the container property with the fluid flow, removing the container units from the transport pins, the fluid flow required for this purpose being set based on the container property.
- the method and its possible developments have features or method steps that make them particularly suitable for being used for a pin furnace and its developments.
- FIG. 1 a schematic, two-dimensional side view of an exemplary embodiment of a pin furnace
- Figure 2 a schematic, two-dimensional detailed view of the in
- FIG. 3 a schematic representation of an exemplary method.
- Figure 1 shows a pin oven 100.
- the pin oven 100 includes a conveyor unit 102, which is designed as a chain.
- the conveyor unit 102 comprises the transport pins 104, 104', 104'' shown in FIG.
- Container units 1, T can be arranged on the transport pins 104, 104', 104'' and thus transported along the meandering drying path.
- the pin oven 100 further includes a fluidic device 108.
- the fluidic device 108 includes a
- a stabilization unit 110 stabilization unit 110, a forced air fluid unit 112, a fluid flow unit 115, a cooling fluid unit 118 and a canister extraction unit 120.
- the container units 1, T are coated in a printing device 134 that is not included in the pin oven 100, in particular with a paint that contains solvents. From the printing device 134 are the
- Container units 1, T transferred to the pin oven 100.
- the printing device 134 and the pin oven 100 can be coupled to one another in such a way that the printing device 134 drives the conveyor unit 102 .
- the container units 1, T first get into a pre-drying frame 124.
- the pre-drying frame 124 acts a stabilization unit 110, the
- the stabilization unit 110 is coupled to a control device 122 and is adjusted by it in such a way that the container units 1, T are stabilized on the transport pins 104, 104′, 104′′ depending on container properties.
- a chain tensioner 154 is provided within the pre-drying frame 124, which tensions the chain of the conveyor unit 102 so that it always has a predefined tension.
- the pin oven 100 also has a density measuring unit 140 which measures the container units 1, T entering the pin oven per unit of time.
- the density measurement unit 140 may have two or more density measurement sensors to enable redundant measurement of the container unit density.
- the pin oven 100 has a speed measuring unit 142 which measures the conveying speed at which the container units 1, T are conveyed through the pin oven. Further, the pin oven 100 has a container measuring unit 144, which is set up to measure container properties, for example a length, a wall thickness, a container structure.
- the pin oven 100 Downstream of the pre-drying frame 124 the pin oven 100 has a bottom coater 126 . Downstream from the bottom coater 126, the pin oven 100 includes an oven unit 128.
- FIG. The oven unit 128 forms an oven space 152 in which the container units 1, 1' are heated to a high temperature, for example more than 180 degrees Celsius for at least 0.5 seconds.
- the oven unit 128 has a heating unit 114 for this purpose.
- the heating unit 114 can be a gas burner, for example.
- the heating unit 114 is coupled to a circulating air fluid unit 112, which moves the fluid flow in the fluid flow direction 116, i.e. first out of the furnace chamber 152 into the heating unit 114, then into the circulating air fluid unit 112 and then back into the furnace chamber 152. A heated fluid flow is thus conveyed to the furnace chamber 152 made available.
- Furnace unit 128 is also coupled to a fluid flow unit 115 .
- the fluid flow unit 115 is arranged and configured to provide the furnace unit 128 with a fluid from the environment of the pin furnace 100 and to lead a fluid out of the furnace unit 128 .
- the pin furnace has a fluid inlet device 136 and a fluid outlet device 138 .
- the fluid outlet device 138 is further coupled to a fluid flow sensor 146 configured to measure fluid flow.
- a first temperature sensor 148 and a second temperature sensor 150 are arranged in the oven chamber 152 and are set up to detect a container temperature of the container units 1, T along the drying section.
- the control device 122 is preferably set up to determine a temperature profile of the container units 1, T along the drying section. Furthermore, it can be preferred to arrange three or more, in particular a large number, of temperature sensors in order to determine a detailed temperature profile, for example.
- a cooling zone 130 is provided downstream of the furnace unit 128 .
- the cooling zone 130 is optional for the pin oven 100 and is usually not mandatory.
- a cooling fluid unit 118 is arranged and designed in the cooling zone 130 in order to cool the container units 1, T with a fluid flow.
- At the A container puller 132 is located at the outlet of the cooling fluid unit 118.
- the container puller 132 has a container removal unit 120, which uses a fluid flow to apply a vacuum to the bottoms of the container units 1, 1' and thus removes them from the conveyor unit 102 and can move them to a downstream process step .
- this section of the conveyor unit 102 moves back to the entrance of the pin oven 100.
- the conveyor unit 102 is guided with a plurality of rollers 156.
- FIG. 2 shows a detail of the pin oven 100, namely the stabilization unit 110.
- the stabilization unit 110 comprises an air duct 158. Openings 160 are provided on one side of the air duct 158. A fluid flow 162 guided in the air channel 158 emerges through the opening 160 and from there exerts fluid pressure on the container units 1, 1'. Due to this pressure, the container units 1, 1' are pressed onto the transport pins 104, 104', 104'' or onto the holding element 106 of the transport pins 104, 104', 104''. As a result, the container units 1, T are stabilized.
- FIG. 3 shows a schematic representation of a method for drying container units 1, T, in particular cans.
- the container units 1, T are conveyed with transport pins 104, 104', 104'' along a drying path.
- the container units 1, T are subjected to a fluid flow at least in sections along the drying section.
- the fluid flow is set essentially steplessly depending on a container property of the container units 1, T.
- An efficient drying process for the container units 1, T with the pin oven 100 can be provided by continuously adjusting the fluid flow device 108 depending on the container properties of the container units 1, T.
- Such a pin oven 100 is resource-saving in comparison to known pin ovens and requires less energy. Further energy savings can be achieved by components of the pin oven 100, such as the detection of speeds and container properties or container properties, so that the fluid flow device 108 can be controlled in such a way that the necessary technical effects, such as drying and reduction of the
- Solvent entry can be achieved and yet the lowest possible energy is consumed.
- fluid flow direction 118 cooling fluid unit 120 container extraction unit 122 control device 124 pre-drying frame 126 bottom coater 128 oven unit 130 cooling zone 132 container stripper 134 printing device 136 fluid inlet device 138 fluid outlet device
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102021115612.2A DE102021115612A1 (de) | 2021-06-16 | 2021-06-16 | Stiftofen zur Trocknung von Behältereinheiten und Verfahren |
PCT/EP2022/066527 WO2022263614A2 (de) | 2021-06-16 | 2022-06-16 | Trocknungsvorrichtung zur trocknung von behältereinheiten und verfahren |
Publications (1)
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EP4356054A2 true EP4356054A2 (de) | 2024-04-24 |
Family
ID=82163604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP22733173.3A Pending EP4356054A2 (de) | 2021-06-16 | 2022-06-16 | Trocknungsvorrichtung zur trocknung von behältereinheiten und verfahren |
Country Status (8)
Country | Link |
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US (1) | US20240288219A1 (de) |
EP (1) | EP4356054A2 (de) |
JP (1) | JP2024523898A (de) |
KR (1) | KR20240021284A (de) |
CN (1) | CN117836579A (de) |
CA (1) | CA3223094A1 (de) |
DE (1) | DE102021115612A1 (de) |
WO (1) | WO2022263614A2 (de) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4052152A (en) * | 1976-02-18 | 1977-10-04 | Sun Chemical Corporation | Direct flame drying apparatus |
US4299036A (en) * | 1979-06-08 | 1981-11-10 | Midland-Ross Corporation | Oven with a mechanism for cascading heated gas successively through separate isolated chambers of the oven |
GB2144988A (en) * | 1983-08-20 | 1985-03-20 | Metal Box Plc | Thermal treatment apparatus |
US4662085A (en) | 1984-11-29 | 1987-05-05 | Feco Engineered Systems, Inc. | Pin oven louver design |
US5272970A (en) * | 1990-12-19 | 1993-12-28 | Carnaudmetalbox Plc | Pin ovens and transfer devices therefor |
US5353520A (en) * | 1993-06-04 | 1994-10-11 | Oven Systems, Inc. | Pin oven system for cans |
WO1995008745A1 (en) * | 1993-09-24 | 1995-03-30 | Optimum Air Corporation | Automated air filtration and drying system for waterborne paint and industrial coatings |
DE102010043087A1 (de) * | 2010-10-28 | 2012-05-03 | Dürr Systems GmbH | Prozesskammer mit Vorrichtung zum Einblasen von gasförmigen Fluid |
DE102012207312A1 (de) * | 2012-05-02 | 2013-11-07 | Dürr Systems GmbH | Prozesskammer mit Vorrichtung zum Einblasen von gasförmigem Fluid |
WO2016079846A1 (ja) * | 2014-11-20 | 2016-05-26 | 日産自動車株式会社 | 塗装乾燥装置及び塗装乾燥方法 |
US11034145B2 (en) * | 2016-07-20 | 2021-06-15 | Ball Corporation | System and method for monitoring and adjusting a decorator for containers |
DE102016119870A1 (de) | 2016-10-18 | 2018-04-19 | Ulf Reinhardt | Stiftofen |
DE102016119864A1 (de) * | 2016-10-18 | 2018-04-19 | Ulf Reinhardt | Stiftofen |
-
2021
- 2021-06-16 DE DE102021115612.2A patent/DE102021115612A1/de active Pending
-
2022
- 2022-06-16 WO PCT/EP2022/066527 patent/WO2022263614A2/de active Application Filing
- 2022-06-16 KR KR1020247001312A patent/KR20240021284A/ko unknown
- 2022-06-16 JP JP2023577771A patent/JP2024523898A/ja active Pending
- 2022-06-16 EP EP22733173.3A patent/EP4356054A2/de active Pending
- 2022-06-16 US US18/570,790 patent/US20240288219A1/en active Pending
- 2022-06-16 CA CA3223094A patent/CA3223094A1/en active Pending
- 2022-06-16 CN CN202280056291.9A patent/CN117836579A/zh active Pending
Also Published As
Publication number | Publication date |
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WO2022263614A3 (de) | 2023-02-09 |
CA3223094A1 (en) | 2022-12-22 |
US20240288219A1 (en) | 2024-08-29 |
CN117836579A (zh) | 2024-04-05 |
KR20240021284A (ko) | 2024-02-16 |
JP2024523898A (ja) | 2024-07-02 |
WO2022263614A2 (de) | 2022-12-22 |
DE102021115612A1 (de) | 2022-12-22 |
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