EP0697928A1 - Systeme de transport, de chargement et/ou de dechargement, pourvu notamment d'une chambre a micro-ondes - Google Patents

Systeme de transport, de chargement et/ou de dechargement, pourvu notamment d'une chambre a micro-ondes

Info

Publication number
EP0697928A1
EP0697928A1 EP95900730A EP95900730A EP0697928A1 EP 0697928 A1 EP0697928 A1 EP 0697928A1 EP 95900730 A EP95900730 A EP 95900730A EP 95900730 A EP95900730 A EP 95900730A EP 0697928 A1 EP0697928 A1 EP 0697928A1
Authority
EP
European Patent Office
Prior art keywords
loading
transport
microwave
chamber
border
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.)
Withdrawn
Application number
EP95900730A
Other languages
German (de)
English (en)
Inventor
Reinhard Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19934338798 external-priority patent/DE4338798A1/de
Priority claimed from DE19944406700 external-priority patent/DE4406700A1/de
Application filed by Individual filed Critical Individual
Publication of EP0697928A1 publication Critical patent/EP0697928A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/046—Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair

Definitions

  • the invention relates to a transport or loading and / or unloading system, in particular for cast-core drying systems or microwave treatment systems, with at least one transport path for items to be treated or transported or associated pick-up devices.
  • the subject matter of the invention also includes a receiving device for goods to be treated or processed, in particular for a transport or loading and / or unloading system, in particular for microwave treatment systems, and also microwave chamber or essential for the operational safety of such a system.
  • Chamber doors with special design features corresponding door control devices with special circuit and functional features.
  • transport systems and systems for loading or unloading are subject to. a. special requirements with regard to a versatile accessibility from service stations, furthermore with regard to an adaptable connection of processing or treatment stations with operated or automated transfer of goods or acceptance as well as with regard to the transition between transport track sections of different directions. This applies above all to the connections between such systems and microwave stations, the inputs and outputs of which are special
  • a first object of the invention is therefore the creation of systems of the present type which enable an improvement with respect to at least one of the criteria mentioned.
  • the system solution according to the invention for this task is initially determined by the following features: a) in the area of the transport track, at least one station with rotatably or pivotably mounted suspension means for goods located in the area of this station or at least one receiving device is provided; b) the axis of rotation or pivoting of the suspension means is arranged at an acute, preferably at least approximately vanishingly small, angle to the vertical.
  • the suspension means are pivotably mounted at least approximately 180 ° and, if necessary, are provided with a rotation or swivel position lock.
  • a rotation or swiveling position lock is preferably considered for at least one pair of directions offset from one another by at least approximately 180 °. It has proven to be particularly expedient if a rotational or swiveling position lock assigned to the direction of the transport path adjoining the station in question is provided for the suspension means.
  • a lifting and lowering device assigned to the holding devices or a plurality of such lifting and lowering means for lifting the holding devices to a first height, in particular to a station working height or to the height of the transport track, and for lowering into one can advantageously be used in the region of the transport path second altitude, e.g. an unloading or starting position can be provided.
  • an unloading or starting position can be provided.
  • Important further developments of the invention also relate, inter alia, to the functional design of stations and aids assigned to the transport path or of overall systems, ie units comprising at least one transport path and at least one station.
  • stations and aids assigned to the transport path or of overall systems ie units comprising at least one transport path and at least one station.
  • the further development of the subject matter of the invention aims at improving the safety of construction, relates first of all to a device for microwave exposure to materials or piece goods, the at least one microwave chamber and at least one microwave supply connected to this chamber and at least one inlet or outlet device designed as a door for material loading or Material removal includes.
  • the closing surface of the chamber door and a border of a wall opening assigned to it extend in the closed position of the chamber door in planes which are at least approximately parallel to one another.
  • at least one contact microwave seal extending along the border is arranged, which has at least one contact strand that is elastically deformable in cross section.
  • Devices of this type are known for the microwave exposure of absorbent materials and piece goods of various types. In all applications, a high level of operational safety is decisive for the successful use of the microwave. This includes practically absolutely reliable keeping clear of the immediate and immediate surroundings of the installation of microwave fields, which exceed a legally prescribed, very low maximum intensity. A major problem with everyone These devices therefore ensure that the chamber doors in the closed state are sufficiently microwave-tight, with a high degree of wear-freeness and for a long service life. In this regard, the known devices are in need of improvement, at least in applications with high medium or local field intensities in the chamber.
  • the object of the invention is to provide devices for microwave exposure which are distinguished by the particularly high reliability and service life of the microwave sealing of their chamber doors.
  • the achievement of this object according to the invention is determined by the features of patent claim 17 or patent claim 18 or patent claim 22.
  • the inventive solution based on the features of claim 22 is based on the same inventive idea, namely an optimization and equalization of the microwave sealing effect in the door area.
  • the resonance microwave seal determined there also allows optimization of the leakage damping, i.e. a minimization of the emerging microwave field, but analogously by adjusting the effective dimensions of the resonance chamber.
  • This seal can basically perform a function similar to that of the contact seal according to the first invention solution, but seals of both types are often used in combination, i.e. arranged in series in the direction of the leakage microwave field striving to emerge. Special developments of this solution are determined by the features of claims 23 and 24.
  • the further development of the object of the invention aimed at circuit-technical or functional safety improvement relates to a device for the microwave application of materials or piece goods, comprising at least one microwave chamber and at least one microwave feed connected to this chamber and at least one inlet or outlet designed as a door ⁇ device for material loading or removal, a drive device which can be activated optionally in the closing direction and in the opening direction is provided for the chamber door.
  • the continuation of the task of the invention consists first of all of ensuring in the event of danger that the microwave supply can be switched off immediately, above all for the working personnel who are in larger chambers, and, if necessary, of facilitating an equally immediate evacuation of the personnel or objects or substances at risk from the chamber .
  • task solutions according to the invention are defined by claims 25 and 26, respectively.
  • a continuation of the task of the invention is to improve the security against a temporal overlap of the switched on microwave feed and a more or less open chamber door.
  • task solutions according to the invention are defined by claims 27 and 28, respectively.
  • Fig.l shows a schematic plan view of a transport or loading and / or unloading system, in particular for cast-core drying systems or microwave treatment systems, with a transport path 5, by means of the receiving devices 10 for transport or treatment goods or such goods - packaged or unwrapped - transported.
  • this transport path is formed by an arrangement of suspension means 20 for the receiving devices.
  • the transport path extends here, for example, from a loading station 1, which is provided with a roller sliding bearing 1 a for the receiving devices, via a succession of three suspension element assemblies 20 to a microwave chamber 2 as a processing station with an inlet sliding door controlled in time with the material flow 2a and outlet sliding door 2b and in a manner not shown further to an unloading station.
  • a removal station 3 and a reloading station 4 are each formed by a suspension element assembly 20.
  • These intermediate stations serve, for example, using an auxiliary device 4a, which is only indicated schematically, for the finishing of cast cores, which are then dried in the microwave chamber 2.
  • the suspension means 20 are rotatably or pivotably mounted, specifically around a pivot or swivel axis 25, which is arranged at an acute, preferably at least approximately vanishingly small, angle to the vertical.
  • the pivot angle is preferably at least approximately 180 °, so that opposite sides of the receiving devices can be brought into the same position.
  • a rotation or swivel position securing device 50 is provided for the suspension means 20 in addition to a roller feed bearing 21 for the holding devices.
  • a rotation or swivel position lock is advantageous for at least one pair of directions offset from one another by at least approximately 180 °, preferably in the form of the embodiment shown with four locking directions offset from one another at right angles.
  • the suspension means 20, which, as usual, have a structurally specified removal or loading side, are pivoted by 90 ° with respect to the transport position at stations 3 and 4, so that they are in a position suitable for removal. and loading work are conveniently located.
  • a determination that can be overcome or overcome by a predetermined adjustment torque is provided by means of a schematically indicated spring latching device 51.
  • suspension means are also arranged in the transition area between transport tracks or transport track sections of different directions and are provided with a rotational or swivel position securing device assigned to the direction of at least one of these transport tracks or transport track sections or a plurality of such securing devices.
  • a transport track connected input, output or transition station and / or loading or unloading station rotatably or pivotally supported, furthermore particularly advantageous between transport track sections of different directions.
  • transition stations can be formed by means of rotatably or pivotably supported suspension means as directional switches between at least three transport track sections of different directions.
  • a corresponding arrangement is also used, in particular, between the transport path and at least one processing or treatment station arranged laterally, in particular at least one microwave chamber, with significant advantages.
  • the suspension means are provided with a lifting and lowering device assigned to the holding devices for lifting holding devices to a first height, in particular to a station working height or to the level of the transport path, and for lowering to a second height.
  • a lifting and lowering device assigned to the holding devices for lifting holding devices to a first height, in particular to a station working height or to the level of the transport path, and for lowering to a second height.
  • Such lifting and lowering devices which are known per se, can also be used advantageously for entry, exit or transition stations and / or loading or unloading stations connected to a transport track.
  • the lifting and lowering devices are further provided with a sliding bearing for the receiving devices, in particular in the transition area between the station and the transport track for the purpose of efficient implementation.
  • the stations are preferably provided with a feed position securing device for holding devices.
  • FIG. 3 shows, as a particularly advantageous embodiment of the invention, a transport or loading and / or unloading system with a transport path 100 of a U-shaped overall course and corresponding deflection stations 130, for which, in turn, suspension elements with a rotating or swivel bearing may be considered.
  • the U-shape of the transport path is made usable in such a way that for two end stations 110 and 120 which are arranged next to one another and are provided for loading or unloading of transport goods, common handling means 140 can be used alternately for loading and unloading are.
  • FIG. 4 finally shows, as an example of use for suspension means according to the invention with a rotating or pivoting bearing, a system similar to that according to FIG. 1, but with a microwave chamber 2 arranged on the side of the transport path 5 as a processing station. Since the loading and unloading of the goods cannot take place in a single pass, but the transport path 5 is operated in a pass, a transition station 30 which is alternately suitable for loading and unloading is provided on the chamber 2.
  • the loading means must also implement a transport movement perpendicular to the direction of travel of the transport path for loading and unloading.
  • a suspension element assembly 20a with a corresponding pivot bearing serves for this purpose in a particularly simple and therefore advantageous manner.
  • FIG. 5 shows in cross section a part of a chamber door KT with an adjacent chamber wall KW at a wall opening WO.
  • the seal surrounds the wall opening without gaps and realizes a combination of features in which a border UR is provided with a microwave seal of the aforementioned type.
  • the overall seal accordingly comprises a series arrangement of a contact microwave seal KMD and a resonance microwave seal RMD.
  • the microwave chamber which is otherwise not further illustrated, can be of a conventional type, for example of the "multiple superimposition chamber” type with frequency and mode splitting and a corresponding, not shown, multiple magnnetron feed.
  • the chamber door serves as an inlet or outlet device for feeding or removing material.
  • the closing surface of the chamber door KT and the border UR of the wall opening assigned to it extend in planes which are at least approximately parallel to one another.
  • the contact microwave seal KMD which extends along the border, is arranged in a simple embodiment, but multiple arrangements are also possible here.
  • the seal KMD comprises at least one contact strand KS which is elastically deformable in cross section and which is preferably arranged in a channel-shaped holder HR.
  • the contact strand KS has an oval cross-sectional shape, at least in the installed state, which has a larger diameter D1 measured transversely to the border plane EE and a smaller diameter D2 measured parallel to the border plane.
  • the lateral inner surfaces SI of the holder HR and the surface areas of the contact strand KS pressed against these inner surfaces are provided with a sliding friendly component and / or a corresponding coating, for example made of polytetrafluoroethylene or the like.
  • the contact strand KS preferably has an oval cross-sectional shape with the aforementioned different cross-sectional diameters D1 and D2 even in the undeformed pre-installed state.
  • the ratio of the larger diameter Dl to the smaller diameter D2 of the contact strand KS is preferably at least about 2: 1.
  • the contact strand KS comprises an at least two-layer contact jacket MK made of electrically conductive and contact-friendly wire mesh and at least one elastically compressible cross-section, in particular core strand SK consisting of a foam with low microwave absorption.
  • the resonance microwave seal RMD is likewise - for example again in a simple design - arranged in the area between the chamber door KT and the border UR of the wall opening and comprises a channel-shaped resonance room RR extending along the border UR with a door gap TS to be sealed between the chamber door and border arranged coupling slot KO.
  • at least one angle profile element WP is provided, which has a first profile leg P1 delimiting the coupling slot KO and the door gap TS and a gripping the inner edge IK of an associated bordering section and on the angled inner surface IF of this bordering section attached second profile leg P2.
  • This Winkelprofil ⁇ element is by means of a releasable pressing device AP in Direction adjustable transversely to the longitudinal direction of the associated border section with the inner surface IF of this border section electrically connected.
  • the pressing device AP is designed as an elongated screw connection between the second profile leg P2 of the angle profile element WP and the inner surface IF of the associated bordering section URA.
  • the channel-shaped resonance chamber RR or the angle profile element WP is divided into a plurality of separately adjustable sections, so that, for example, existing dimensional deviations which are distributed differently over the length of the border can be taken into account.
  • FIG. 6 shows a microwave chamber MWK with at least one microwave feed MWS connected to this chamber and at least one inlet or outlet device designed as a chamber door KT for material loading or material removal.
  • a drive device AVR that can be activated optionally in the closing direction and in the opening direction is provided, for example a type that is conventional per se with an electric motor drive.
  • an emergency shutdown device NTA which is connected to the microwave supply in control connection STV3, is provided, which has at least one inside the chamber and preferably has at least one release handle AH arranged outside the chamber. This ensures extremely quick trigger access to switch off the microwave fields, especially from the chamber.
  • a control connection STV1 activating the opening of the door is provided between the emergency shutdown device NTA and the chamber door drive device AVR.
  • a further essential safety feature of this embodiment according to the invention is that a switch-off monitoring ASU is provided for the microwave supply, which is in control connection STV2 with the chamber door drive device AVR and blocks the activation of the door opening until the microwave supply has been switched off completely. Inadmissible overlaps in time, in which the microwave field could be switched on despite the chamber door not being closed or not yet completely closed, are thus definitely ruled out.
  • a door closing monitoring device TUW has proven to be particularly simple and reliable, which has at least one proximity switch AS which interacts directly with the chamber door KT or with a control element attached to it.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un système de transport, de chargement et/ou de déchargement, notamment pour installations de séchage de noyaux ou d'installations de traitement par micro-ondes, qui comprend au moins une piste de transport pour les produits à traiter ou à transporter et des dispositifs de réception associés. Des éléments porteurs (20) montés rotatifs ou pivotants dans la zone de la piste de transport (5) sont prévus pour les produits à transporter ou pour au moins un dispositif de réception des produits transportés. L'axe de rotation ou de pivotement (25) des éléments porteurs forme par rapport à la verticale un angle aigu de préférence au moins approximativement nul.
EP95900730A 1993-11-13 1994-11-13 Systeme de transport, de chargement et/ou de dechargement, pourvu notamment d'une chambre a micro-ondes Withdrawn EP0697928A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4338798 1993-11-13
DE19934338798 DE4338798A1 (de) 1993-11-13 1993-11-13 Einrichtung zur Mikrowellenbeaufschlagung von Materialien oder Stückgütern
DE4406700 1994-03-02
DE19944406700 DE4406700A1 (de) 1994-03-02 1994-03-02 Transport bzw. Belade- und/oder Entladesystem
PCT/EP1994/003768 WO1995013888A1 (fr) 1993-11-13 1994-11-13 Systeme de transport, de chargement et/ou de dechargement, pourvu notamment d'une chambre a micro-ondes

Publications (1)

Publication Number Publication Date
EP0697928A1 true EP0697928A1 (fr) 1996-02-28

Family

ID=25931197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900730A Withdrawn EP0697928A1 (fr) 1993-11-13 1994-11-13 Systeme de transport, de chargement et/ou de dechargement, pourvu notamment d'une chambre a micro-ondes

Country Status (4)

Country Link
EP (1) EP0697928A1 (fr)
AU (1) AU8143194A (fr)
DE (1) DE4498884D2 (fr)
WO (1) WO1995013888A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543266A1 (de) * 1995-11-20 1997-05-22 Schulze Reinhard Einrichtung zur Mikrowellenbeaufschlagung von Materialien oder Stückgütern
DE102020211223A1 (de) 2020-09-08 2022-03-10 Volkswagen Aktiengesellschaft Trocknungssystem für 3D-Druckbauteile, Fertigungssystem für die Herstellung von 3D-Druckbauteile

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405435A (en) * 1980-08-27 1983-09-20 Hitachi, Ltd. Apparatus for performing continuous treatment in vacuum
DE3119979A1 (de) * 1981-05-20 1982-12-16 Wolfgang 6300 Gießen Uhrig Verfahren und vorrichtung zum trocknen von formlingen aus ton
DE4036112C2 (de) * 1990-11-13 1994-04-21 Fraunhofer Ges Forschung Einrichtung zum kontinuierlichen Trocknen von stückigem, granulatförmigen oder fasrig-blättrigem Gut
EP0554559B1 (fr) * 1992-01-03 1999-09-22 SCHULZE, Reinhard Procédé et dispositif, notamment pour sécher, des matériaux employant des micro-ondes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9513888A1 *

Also Published As

Publication number Publication date
AU8143194A (en) 1995-06-06
DE4498884D2 (de) 1998-02-05
WO1995013888A1 (fr) 1995-05-26

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