Extraction device for a vulcanising system

Abstract

The invention relates to an extraction device (2) for a vulcanising system (1), which vulcanising system comprises at least two vulcanising stations (4) for producing vehicle tyres (8). The extraction device (2) comprises an enclosure (20), which surrounds and covers the two vulcanising stations (4), and an extractor (22) for extracting vapours and / or gases (12) from the enclosure (20). The extraction device (2) additionally comprises an extraction hood (24) for each of the vulcanising stations (4), which extraction hood is arranged within the enclosure (20) adjacent to the relevant vulcanising station (4) for local extraction of vapours and / or gases (10) from a vehicle tyre (8). An element (26) for air flow control is installed for each of the extraction hoods (24), which element is designed to activate local extraction of vapours and / or gases (10) from a vehicle tyre (8) when the vehicle tyre (8) is removed from the vulcanising station (4) and during cooling of the vehicle tyre (8) in a cooling region (6).

Description

[0001] 202305762

[0002] 1

[0003] Description

[0004] Extraction device for a vulcanizing plant

[0005] The present invention relates to a suction device for a system for vulcanizing vehicle tires, which has at least two vulcanizing stations for vulcanizing vehicle tires.

[0006] In a vulcanizing station, a tire blank is deformed and vulcanized under high pressure and high temperature. The temperature is generated, for example, by steam and inert gas, hot water, or electricity. Therefore, the vulcanizing station generates a large amount of heat during the production of vehicle tires, as well as organic compounds and fumes in the production hall, which are undesirable when the vulcanizing station is opened after a tire has been vulcanized.

[0007] CN 117379945 A discloses a system for vulcanizing vehicle tires, comprising several vulcanizing stations. Each vulcanizing station is associated with a cooling station where the vehicle tires cool after vulcanization. To extract fumes and gases generated during vulcanization, the system has an extraction device with multiple extraction hoods, with each vulcanizing station and each cooling station covered by an extraction hood. The extraction hoods are each controlled by a valve and are connected via a pipeline containing a fan to a high-efficiency filter. Additionally, the entire system is covered by an extraction hood, which is connected via another pipeline containing a fan to a low-temperature plasma filter to extract any remaining fumes and gases. 202305762

[0008] 2

[0009] CN 114770994 A discloses a system for vulcanizing and molding rubber, in particular a vulcanizing station for bicycle tires. The system comprises a lower and an upper molding part, the upper molding part having a hood-shaped cover for an extraction system. When the vulcanizing station is opened after vulcanization by moving the upper molding part upwards, the fumes and gases that were generated during vulcanization and rise upwards are extracted through the cover.

[0010] The publication by K. Liu et al., “Combining push-pull airflow and top draft hood for local exhaust of tyre vulcanization process”, Energy and Built Environment, Vol. 1 (2020), pages 296-306, discloses an extraction device for a vehicle tire vulcanizing station, which includes an extraction hood positioned obliquely above a cooling station associated with the vulcanizing station. When the vulcanizing station is opened after a vehicle tire has been vulcanized, a push-pull airflow is generated for a short period, creating an air curtain around the vulcanizing station, with the airflow being extracted through the extraction hood. Subsequently, the vehicle tire is conveyed to the cooling station, and the remaining outgassing vapors and gases from the vehicle tire are removed by the extraction hood.

[0011] It is an object of the present invention to provide an extraction device for a vulcanizing plant which provides cost-effective extraction.

[0012] This problem is solved by a suction device having the features of claim 1.

[0013] Preferred embodiments of the invention are the subject of the dependent claims. 202305762

[0014] 3

[0015] The invention relates to an extraction device for a vulcanizing plant comprising at least two vulcanizing stations for the production of vehicle tires. The extraction device includes an enclosure that surrounds and covers the two vulcanizing stations, as well as an extraction system for removing vapors and / or gases from the enclosure. The extraction device also includes an extraction hood for each of the vulcanizing stations, arranged within the enclosure adjacent to the respective vulcanizing station, for the local extraction of vapors and / or gases from a vehicle tire. Each extraction hood is equipped with an airflow control element configured to activate the local extraction of vapors and / or gases from a vehicle tire when the tire is removed from the vulcanizing station and cools down in a cooling zone.Local extraction of vapors and / or gases significantly reduces the amount of air that needs to be extracted by the system. This reduces the energy consumption of the extraction system and also the energy required for air conditioning the production areas.

[0016] According to one aspect of the invention, the airflow control elements are implemented as control flaps. This allows for simple activation or deactivation of the local extraction without complex mechanics.

[0017] According to one aspect of the invention, the airflow control elements are connected to a control system for the vulcanizing stations. In this way, local extraction can be activated directly by the respective vulcanizing station as needed.

[0018] According to one aspect of the invention, the airflow control elements are controlled by an independent control unit with associated sensors. This has the advantage that no interface for connection to the vulcanizing station's control system is required. 202305762

[0019] 4

[0020] According to one aspect of the invention, the extraction hoods each provide a volume flow on the order of 4000 m³ / h. 3 / h up to 8000 m 3 / h ready, preferably 6000 m 3 / h. Due to local extraction at the point of origin of the vapors or gases, only a low extraction capacity is required.

[0021] According to one aspect of the invention, the extraction system for the enclosure provides a volume flow rate on the order of 25,000 m³ / h. 3 / h up to 40000 m 3 / h ready, preferably 33000 m 3 / h. This is a significantly lower volume flow rate than is the case with known solutions. Since a large proportion of the resulting vapors or gases are already extracted locally by the extraction hoods, only a small amount of vapors or gases needs to be removed by the extraction system.

[0022] According to one aspect of the invention, the extraction system and the extraction hoods are connected to a common exhaust air treatment system. This reduces the effort required for exhaust air treatment.

[0023] According to one aspect of the invention, six or more extraction hoods are arranged in the enclosure.

[0024] Further features of the present invention will become apparent from the following description and the attached claims in conjunction with a figure.

[0025] Figure overview

[0026] Fig. 1 shows a vulcanizing plant for the production of vehicle tires, which is equipped with a suction device.

[0027] Figure description 202305762

[0028] 5

[0029] To better understand the principles of the present invention, embodiments of the invention are explained in more detail below with reference to the figures. The same reference numerals are used in the figures for identical or equivalently acting elements and are not necessarily described again for each figure. It is understood that the invention is not limited to the embodiments shown and that the described features can also be combined or modified without departing from the scope of protection of the invention as defined in the appended claims.

[0030] Figure 1 schematically shows a cross-sectional view of a vulcanizing plant 1 for the production of vehicle tires 8, comprising two vulcanizing stations 4 and a cooling area 6 with a transport device. The cooling area 6 is located between the two vulcanizing stations 4. In the vulcanizing stations 4, vehicle tires 8, particularly for motor vehicles and commercial vehicles, are produced from tire blanks using pressure and heat in a vulcanization process. The vehicle tires 8, which are removed from the vulcanizing stations 4 after the vulcanization process, are then conveyed through the cooling area 6, where they remain for a certain period of time to cool. During removal from the vulcanizing stations 4 and during cooling in the cooling area 6, most of the vapors and gases 18 are emitted by the vehicle tires 8.

[0031] The vulcanizing plant 1 is equipped with an extraction device 2, which has an enclosure 20 that surrounds and covers the two vulcanizing stations 4. An extraction system 22 serves to extract vapors and / or gases 12 from the enclosure 20. An extraction hood 24 is provided for each of the vulcanizing stations 4, which is arranged within the enclosure 20 adjacent to the respective vulcanizing station 4. The extraction hoods 24 serve for the local extraction of vapors and / or gases 10 from a vehicle tire 8.

[0032] 6

[0033] Each of the extraction hoods 24 has an airflow control element 26. This element is configured to activate local extraction of vapors and / or gases 10 from a vehicle tire 8 when the vehicle tire 8 is removed from the vulcanizing station 4 and cools down in the cooling area 6. The airflow control elements 26 are preferably implemented as control flaps.

[0034] The extraction system 22 and the extraction hoods 24 are connected to a common exhaust air treatment system 30 via an exhaust system comprising a piping system 29 with a fan 28. This system serves to treat the vapors and gases generated during the vulcanization processes and to prevent the release of harmful substances into the environment. The exhaust air treatment system 30 can be equipped, for example, with an air filter or a comparable device for cleaning the air.

[0035] The majority of the vapors and gases 10, as well as the heat generated during the vulcanization of a vehicle tire 8, are produced by the vulcanized vehicle tire 8 immediately after the vulcanizing station 4 is opened, when a curing process of the vehicle tire 8 takes place, and when the vehicle tire 8 is transported through the cooling area 6 for cooling.

[0036] The extraction device 2 now functions as follows. The fan 28 is continuously in operation. Initially, the two airflow control elements 26 are closed. In this first phase, vapors and gases 12 are extracted from the interior of the enclosure 20 solely by means of the extraction system 22. If a vulcanizing station 4 is now opened after the vulcanization of a vehicle tire, the corresponding airflow control element 26 simultaneously activates the associated extraction hood 24. This causes the vapors and gases 10 escaping when the vulcanizing station 4 is opened to be extracted locally from the interior of the enclosure 20 by the extraction hood 24.

[0037] 7

[0038] The extraction hoods 24 are located in enclosure 20. Since only local extraction and therefore a low extraction capacity is required, the extraction hoods 24 each provide a volume flow on the order of 4000 m³ / h. 3 / h up to 8000 m 3 / h ready, for example 6000 m 3 / h.

[0039] After the vulcanizing station 4 opens, the vehicle tire 8 is ejected from the vulcanizing station 4 and transported through the cooling area 6. The associated extraction hood 24 remains active, so that the resulting fumes 10 continue to be extracted locally. When the vehicle tire 8 finally leaves the area of ​​local extraction, the associated extraction hood 24 can be deactivated. The vehicle tire 8 is now cooled to the point that it emits hardly any further fumes and gases and is passed by the transport device to a discharge unit (not shown in Fig. 1), so that the space in the cooling area 6 is free again. Any remaining fumes and gases 12 are extracted by the extraction system 22, which operates at a comparatively low volume flow rate on the order of 25,000 m³ / h for this purpose. 3 / h up to 40000 m 3 / h provides, for example 33000 m 3 / h.

[0040] The process described above is repeated accordingly for the next vehicle tire 8 that leaves the vulcanizing station 4.

[0041] For demand-based control of the airflow control elements, these can be connected to a control system for the vulcanizing stations. Alternatively, the airflow control elements can be controlled by an independent control system with associated sensors. The sensors can detect the resulting vapors or gases, whereupon the respective extraction hood 24 is activated by the control system. 202305762

[0042] 8

[0043] The vulcanizing plant 1 preferably comprises a plurality of vulcanizing stations, with a cooling area and a transport device arranged between each pair of adjacent vulcanizing stations. The vulcanizing plant can, in particular, have six or more vulcanizing stations and thus six or more extraction hoods per enclosure.

[0044] 202305762

[0045] 9

[0046] Reference symbol list

[0047] 1 vulcanizing plant

[0048] 2 Extraction device 4 Vulcanizing station

[0049] 6 Cooling area

[0050] 8 vehicle tires

[0051] 10 Steam or gas

[0052] 12 Steam or gas 20 Enclosure

[0053] 22 Extraction

[0054] 24 Extraction hood

[0055] 26 elements for airflow control

[0056] 28 Fan 29 Piping system

[0057] 30 Exhaust air treatment

Claims

202305762 10 Patent claims 1. Extraction device (2) for a vulcanizing plant (1) which has at least two vulcanizing stations (4) for the production of vehicle tires (8), comprising: - an enclosure (20) that surrounds and covers the two vulcanizing stations (4); - an extraction system (22) for the extraction of vapors and / or gases (12) from the enclosure (20); - one extraction hood (24) for each of the vulcanizing stations (4), which is arranged within the enclosure (20) adjacent to the respective vulcanizing station (4), for local extraction of vapors and / or gases (10) from a vehicle tire (8); and -each an element (26) for airflow control for each of the extraction hoods (24), which is set up to activate a local extraction of vapors and / or gases (10) of a vehicle tire (8) when the vehicle tire (8) is removed from the vulcanizing station (4) and when the vehicle tire (8) is cooled in a cooling area (6).

2. Extraction device (2) according to claim 1, wherein the elements (26) for airflow control are implemented as control flaps.

3. Extraction device (2) according to claim 1 or 2, wherein the elements (26) for airflow control are connected to a control of the vulcanizing stations (4).

4. Extraction device (2) according to claim 1 or 2, wherein the elements (26) for airflow control are controlled by an independent control unit with associated sensors. 202305762 11 5. Extraction device (2) according to one of the preceding claims, wherein the extraction hoods (24) each have a volume flow rate on the order of 4000 m³ 3 / h up to 8000 m 3 / h provide, preferably 6000 m 3 / h.

6. Extraction device (2) according to one of the preceding claims, wherein the extraction (22) for the enclosure (20) has a volume flow rate on the order of 25000 m³ 3 / h up to 40000 m 3 / h provides, preferably 33000 m 3 / h.

7. Extraction device (2) according to one of the preceding claims, wherein the extraction (22) and the extraction hoods (24) are connected to a common exhaust air treatment (30).

8. Extraction device (2) according to one of the preceding claims, wherein six or more extraction hoods (24) are arranged in the housing (20).

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