EP2008770B1 - Process for cleaning moulds with dry ice - Google Patents

Process for cleaning moulds with dry ice Download PDF

Info

Publication number
EP2008770B1
EP2008770B1 EP07020862A EP07020862A EP2008770B1 EP 2008770 B1 EP2008770 B1 EP 2008770B1 EP 07020862 A EP07020862 A EP 07020862A EP 07020862 A EP07020862 A EP 07020862A EP 2008770 B1 EP2008770 B1 EP 2008770B1
Authority
EP
European Patent Office
Prior art keywords
dry ice
release agent
cleaning
compressed air
layer
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.)
Not-in-force
Application number
EP07020862A
Other languages
German (de)
French (fr)
Other versions
EP2008770A1 (en
Inventor
Peter Dr. Würtz
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.)
Linde GmbH
Original Assignee
Linde GmbH
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
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP2008770A1 publication Critical patent/EP2008770A1/en
Application granted granted Critical
Publication of EP2008770B1 publication Critical patent/EP2008770B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B24C11/005—Selection of abrasive materials or additives for abrasive blasts of additives, e.g. anti-corrosive or disinfecting agents in solid, liquid or gaseous form

Definitions

  • the present invention relates to an apparatus and a method for cleaning molds with dry ice.
  • Another alternative is to clean components by bombardment by dry ice pellets, so small pieces of dry ice rice grain size.
  • dry ice is transferred to the solid state and cooled to at least -78.5 ° C carbon dioxide. Dry ice passes under atmospheric pressure directly from the solid state in the gaseous, whereby no molten liquid is formed. This can be done in a particularly simple manner, namely with normal compressed air, both the bombardment with dry ice and the suction and removal of dirt particles.
  • dry ice can be used in various forms. Dry ice is present during production in the form of snow. To remove more stubborn soiling, it is compressed into dry ice granules or dry ice pellets by pressing through dies. The mass density of the pellets is about 1000 kg / m 3 . They have the form of pins with a length of about 5 mm to 30 mm and a diameter of about 3 mm.
  • the device has a multi-axially movable blasting device and a manipulation device.
  • the blasting device and the manipulation device are received by an insulation hood.
  • the insulation cover is connected via a support arm and an adapter ring on the outer circumference of a part mold.
  • the device is intended to clean any part of molds without waiting until the molds cool down.
  • the blasting or cleaning area should be encapsulated.
  • the FR-A-2 837 122 discloses an apparatus and method for cleaning or ablating surfaces.
  • the surfaces to be cleaned may be formed of metals or composites. In this method, it is intended to clean the surfaces by means of compressed air and cryogenic CO 2 .
  • the cryogenic CO 2 is provided with an additive of synthetic or mineral particles.
  • the synthetic additives may be formed, for example, from talc or resin-wrapped recycling waste.
  • a dry-ice air jet liquid detergent is added so that it impinges on a surface to be cleaned at the same time with the dry ice air jet.
  • the detergent additive is intended to speed up and improve the cleaning process.
  • the dry ice blasting material should only be aimed very briefly at a surface to be cleaned, as a result of which the cold stresses of the object to be cleaned are reduced and thus also manageable for sensitive materials. In this way, even sensitive surfaces, such as glass, are cleaned effectively and without damage.
  • the cleaning agent can be supplied to the dry ice air jet at various points of the device.
  • an apparatus and method for cleaning machinery and apparatus in nuclear power plants by abrasive irradiation is disclosed. It is intended to apply dry ice particles to the surface to be cleaned.
  • the dry ice particles may be mixed with ice particles and / or surface-active additives to prevent the dissolved particles from spreading in the atmosphere.
  • dissolved contaminated particles are to be bound in the melt water, whereby the removal of contaminated particles should be simplified.
  • abrasive cutting is described.
  • the method is particularly intended for cutting sensitive materials such as explosives.
  • a first liquid is cooled below ambient temperature in a storage tank, the cooled liquid is then pressurized and discharged in the form of a jet.
  • the jet is supplied with a second liquid to form solid abrasive particles in the nozzle body. These particles are to perform the cutting process without causing a blast.
  • rice-grain-sized pellets are metered from the storage container of the machine into a stream of compressed air via a rotating air lock, carried in the direction of a blasting gun and finally accelerated to a speed of sound in a Laval nozzle. The pellets then bounce on the surface to be cleaned.
  • the 2-hose blasting systems use the suction principle.
  • a stream of compressed air creates a partial vacuum in a blasting gun.
  • the dry ice granules are transported from the storage container of the device via a dosing screw into a suction area. There, the pellets are entrained by the negative pressure in the blasting hose and transported to a Venturi nozzle, from where they are accelerated in the direction of the cleaning target.
  • the object of the invention is to provide a method with which it is possible that molds can be cleaned quickly and that it is reliably prevented that new plastic moldings adhere to the mold after cleaning.
  • a method for cleaning molds for plastic molding, in particular PUR moldings, with dry ice wherein the dry ice is conveyed from a storage container, metered via a mixing unit and / or mixed with compressed air.
  • the dry ice is blasted together with a release agent on a surface to be cleaned.
  • a release agent layer is applied to the surface of the mold.
  • a part of the applied release agent is again removed by the hitting the surface of dry ice.
  • This results in that the release agent is applied in a very thin layer, which allows the mold to be used immediately without further treatment and delay for the production of a further plastic molding which can be easily removed from the mold after manufacture.
  • the time required for startup is very low, since the molds are only slightly cooled after cleaning and thus less energy and time is required for heating.
  • the mold cleaning apparatus 1 comprises a reservoir 2 for storing and storing dry ice.
  • the reservoir 2 is square in plan view.
  • the storage container 2 has a bottom wall 3, two side walls 4, a front wall 5 and a rear wall 6.
  • On the top of a flap 7 is formed for introducing the dry ice.
  • the front wall 5 is arranged obliquely at an angle of about 60 ° relative to the bottom wall 3.
  • the bottom wall 3 has a funnel-shaped filler neck 8, which connects the reservoir 2 with a metering 9.
  • the filler neck 8 is formed as a valve 8 with an iris-shaped opening mechanism. About the filler neck 8, the dry ice enters the metering unit. 9
  • the metering disk 9 is arranged below the storage container 2.
  • the metering disk 9 has, for example, 16 cylindrical through-holes 10.
  • the through holes 10 are filled in a position 11 below the filler neck 8 with dry ice.
  • An electric motor sets the dosing disc 9 in a uniform rotational movement to the through holes 10 from the filler neck 8 to a compressed air line 12 to transfer.
  • the compressed air line 12 has an interruption 13, in which the metering 9 is arranged.
  • the compressed air line 12 empties the through holes 10 of the metering disc 9 and accelerates the dry ice contained therein, that is, the metering 9 dosed dry ice into a flowing in the compressed air line 12 compressed air flow 14. Below the range 13 of the metering 9, the compressed air line 12 continues.
  • the nozzle ring 16 encloses the circumference of the compressed air line 12 in a circular manner and has a plurality of nozzles.
  • the dry ice in the interior of the compressed air line 12 is uniformly sprayed or mixed with release agent. In this way, a compressed air-dry ice release agent mixture is formed in the compressed air line 12.
  • a blasting hose 18 is connected to the compressed air line 12.
  • the blasting hose 18 opens into a blasting gun 19.
  • the blasting gun 19 has a valve 21 connected to a trigger 20 and a nozzle 22 arranged downstream of the valve 21, for example a Laval nozzle 22.
  • the Laval nozzle 22 accelerates the compressed air-dry ice release agent mixture to approximately the speed of sound. If the valve 21 is actuated via the trigger 20 of the blasting gun 19, the compressed air-dry ice-separating agent mixture is discharged and directed to a surface to be cleaned.
  • the filler neck 8 of the storage container 2 is connected to one end of a metering screw 23 for the removal of dry ice from the storage container 2.
  • a metering screw 23 for the removal of dry ice from the storage container 2.
  • the other end of the metering screw 23 opens into a feed tube 24, which is connected to a blasting gun 25.
  • the feed tube 24 serves to transport the dry ice into the blasting gun 25.
  • a compressed air line 26 also opens into the blasting gun 25.
  • the compressed air line 26 opens in the longitudinal direction in a nozzle 27 for accelerating the compressed air.
  • the feed tube 24 opens laterally into the nozzle 27, which forms a mixing chamber 27. Due to the compressed air flowing through the mixing chamber 27, a vacuum is generated in the feed tube 24, through which the dry ice is sucked into the mixing chamber 27.
  • a release agent nozzle 28 is connected, which is connected to a separating agent container 29 via a line 30.
  • the release agent nozzle 29 is charged with release agent from the release agent tank 29. In this way, the release agent nozzle 28 metered release agent into the mixing chamber 27. As a result, a compressed air-dry ice release agent mixture is formed in the mixing chamber 27.
  • a Laval nozzle 32 is connected, which additionally accelerates the compressed air-dry ice release agent mixture.
  • the blasting gun 25 has a trigger 33 and a valve 34 which is formed in the region in which the compressed air line 26 opens into the blast gun 25.
  • the valve 34 is actuated via the trigger 33 of the blast gun 25, the compressed air-dry ice-separating agent mixture is discharged and directed to a surface to be cleaned.
  • the release agent may already be integrated or deposited in the dry ice before it is introduced into the reservoir 2 and / or the release agent is supplied in the reservoir 2 and / or the metering 9 and the metering screw 23 and / or the line 12, 18, 26, 30 and / or the blasting gun 19, 25 or the nozzle / s 22, 27, 28, 32 contained therein.
  • the dry ice is introduced through the flap 7 in the reservoir 2.
  • the valve 21 of the blasting gun 19 opens.
  • compressed air flows through the compressed air line 12 and out of the blast gun 19.
  • the compressed air has a pressure of about 8 bar to 12 bar and preferably about 10 bar, depending on the nature of the pollution and the form to be cleaned.
  • the dry ice passes through the open filler neck 8 in a corresponding cylindrical through hole 10 of the dosing 9.
  • the desired amount of dry ice can be regulated.
  • the electric motor sets the dosing disc 9 in a uniform rotational movement and thus promotes the filled with dry ice through hole of position 11 for interruption 13th
  • the dry ice is entrained by the compressed air and accelerated.
  • the release agent pump delivers release agent from the release agent tank 17, which is metered into the compressed air line 12 via the nozzles of the nozzle ring 16.
  • the nozzles of the nozzle ring 16 inject such a release agent into the compressed air line 12, that the surface of the passing dry ice is almost completely wetted with release agent and the compressed air-dry ice release agent mixture is formed.
  • the ratio of release agent to dry ice is about 1: 5 to 1:50 and preferably 1:10 to 1:20, according to the application.
  • the compressed-air-dry-ice release agent mixture passes from the compressed air line 12 into the blasting hose 18 and flows through the valve 21 of the blasting gun 19, which is opened via the trigger 20.
  • the dry ice is accelerated to approximately the speed of sound via the nozzle 22 of the blasting gun 19 and takes in this manner the necessary Energy to clean a surface. From the blasting gun 19 from the compressed air-dry ice-separating agent mixture is directed to the surface to be cleaned.
  • dry ice, compressed air and separating agent are first mixed in the nozzle 27 of the blasting gun and there the compressed air-dry ice-separating agent mixture is formed.
  • the metered amount of release agent and the nature of the dry ice, the layer thickness of the remaining in the form or applied release agent can be controlled or varied.
  • dry ice can be used as carbon dioxide in the form of dry ice pellets and also dry ice snow of expanded liquid CO 2 .
  • liquid carbon dioxide it is particularly advantageous to mix liquid release agent with liquid carbon dioxide before relaxation under pressure (20 to 65 bar) in the subcritical range. In the subsequent relaxation, a particularly uniform mixing of CO 2 snow and release agent
  • release agent-added dry ice The production of release agent-added dry ice is described below.
  • release agent In the production of dry ice is provided to the dry ice snow before pushing through dies release agent in the ratio 1: 5 to 1:50 and preferably 1:10 to 1:20 supply.
  • the release agent can be fed to the dry ice as a separate particle, liquid or gas. In this way, the release agent is integrated into the dry ice and / or deposited and / or admixed.
  • Dry ice snow thus mixed with release agent can be used for cleaning just as liquid release agent-added CO 2 can be used.
  • the release agent during pelleting.
  • the dry ice is supplied as a separate solid particles or liquid when pressed through the matrices in the die, for example, nozzle-shaped openings in the die.
  • the release agent is completely or at least partially integrated into the dry ice pellets and / or deposited on the surface thereof.
  • the dry ice pellets are fed after pelletizing release agent as a separate particle, liquid or gas.
  • the release agent is completely or at least partially deposited or mixed on the surface of the dry ice pellets.
  • the dirt layer is removed on the mold and at the same time a layer of fresh release agent is built up or applied to the mold.
  • This layer is removed from the dry ice by the balance between application and removal only to a small extent again and remains by choosing the jet pressure in the desired thickness in the mold.
  • the thickness of the release agent layer is about 10 ⁇ m to 120 ⁇ m and preferably 30 ⁇ m to 50 ⁇ m.
  • a release agent layer can be produced by the equilibrium during simultaneous cleaning or removal and wetting with release agent or application, in the required thickness on an inner surface of a mold. This saves time because the release agent layer does not have to be applied separately and what much more importantly, the rejects are reduced until the production runs continuously again after cleaning because fewer parts are rejected by the wrong release agent thickness release agent. If the release agent layer is too thick, the moldings do not have the desired surface, and if the release agent layer is too thin, the parts stick in the molds, destroying them upon release. In the method according to the invention, a layer of fresh release agent is built up on the mold, which is removed only to a small extent by the dry ice and thus remains in the mold as a protective layer in order to avoid these problems.
  • a method for cleaning molds with dry ice according to claim 1 wherein the dry ice is conveyed from a storage container, metered via a mixing unit and / or mixed with compressed air.
  • the dry ice is blasted together with a release agent on a surface to be cleaned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

The method involves extracting dry ice from a reservoir (2) that is dosed by a mixing unit, and is mixed with compressed air. The dry ice is radiated with a separating unit on cleaning surface. Equilibrium is developed between the cleaned surface and the separating unit, where a separating layer is formed on the surface. The separating layer is developed in a thickness of 10 picometer to 120 picometer, particularly 30 picometer to 50 picometer, which is provided as dry ice carbon-dioxide-pellets. The separating unit is provided in form of a fluid. Independent claims are also included for the following: (1) a device for cleaning surfaces (2) dry ice is integrated in separating unit.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zum Reinigen von Formen mit Trockeneis.The present invention relates to an apparatus and a method for cleaning molds with dry ice.

Zum Reinigen der Innenoberfläche bzw. der Innenwandungen von im industriellen Bereich eingesetzten Formen und Werkzeugen, im wesentlichen von solchen aus Metall, sind unterschiedlichste chemische und physikalische Reinigungsverfahren und Möglichkeiten bekannt.For cleaning the inner surface or the inner walls of molds and tools used in the industrial sector, essentially of metal, a wide variety of chemical and physical cleaning methods and possibilities are known.

Chemische Reinigungsverfahren erfordern aufgrund der dort verwendeten oft· aggressiven Mittel und aufgrund gesetzlicher Vorschriften einen hohen Aufwand an Sicherheits- und Entsorgungseinrichtungen. Daher ist es bei den physikalischen Reinigungsverfahren, bei denen die Verunreinigungen in der Regel durch Beschuss oder Bestrahlung der zu reinigenden Oberfläche mit Sand-, Metall- oder Glaspartikeln entfernt werden, erforderlich, dass das Reinigen selbst in gesonderten Kabinen durchgeführt wird. Hierfür muss das zu reinigende Bauteil zunächst aus der entsprechenden Maschine ausgebaut und in eine solche Kabine eingelegt werden.Due to the often aggressive substances used there and due to legal regulations, chemical cleaning methods require a high expenditure on safety and disposal facilities. Therefore, in the physical cleaning processes in which the impurities are usually removed by bombardment or irradiation of the surface to be cleaned with sand, metal or glass particles, it is required that the cleaning be carried out even in separate cabins. For this purpose, the component to be cleaned must first be removed from the corresponding machine and inserted into such a cabin.

Eine weitere Alternative besteht darin, Bauteile mittels Beschuss durch Trockeneispellets, also kleinen Trockeneis-Stücken in Reiskorngröße, zu reinigen. Beim Trockeneis handelt es sich um in den festen Aggregatzustand überführtes und auf mindestens -78.5°C gekühltes Kohlendioxid. Trockeneis geht unter Atmosphärendruck unmittelbar vom festen Aggregatzustand in den gasförmigen über, wobei keine Schmelzflüssigkeit entsteht. Dadurch kann auf besonders einfache Weise, nämlich mit normaler Druckluft, sowohl der Beschuss mit Trockeneis als auch die Absaugung und Abfuhr der Schmutzpartikel erfolgen.Another alternative is to clean components by bombardment by dry ice pellets, so small pieces of dry ice rice grain size. When dry ice is transferred to the solid state and cooled to at least -78.5 ° C carbon dioxide. Dry ice passes under atmospheric pressure directly from the solid state in the gaseous, whereby no molten liquid is formed. This can be done in a particularly simple manner, namely with normal compressed air, both the bombardment with dry ice and the suction and removal of dirt particles.

Zu Reinigungszwecken kann Trockeneis in verschiedenen Formen verwendet werden. Trockeneis liegt bei der Produktion in Form von Schnee vor. Um hartnäckigere Verschmutzungen abrasiv zu entfernen wird er zu Trockeneisgranulat bzw. Trockeneispellets komprimiert, indem man ihn durch Matrizen drückt. Die Massendichte der Pellets beträgt etwa 1000 kg/m3. Sie haben die Form von Stiften mit einer Länge von etwa 5 mm bis 30 mm und einem Durchmesser von etwa 3 mm.For cleaning purposes, dry ice can be used in various forms. Dry ice is present during production in the form of snow. To remove more stubborn soiling, it is compressed into dry ice granules or dry ice pellets by pressing through dies. The mass density of the pellets is about 1000 kg / m 3 . They have the form of pins with a length of about 5 mm to 30 mm and a diameter of about 3 mm.

Aus der DE 199 36698 C1 ist eine Vorrichtung zur Reinigung von Vulkanisationsformen bekannt. Die Vorrichtung weist eine mehrachsig bewegliche Strahleinrichtung und eine Manipulationseinrichtung auf. Die Strahleinrichtung und die Manipulationseinrichtung werden von einer Isolationshaube aufgenommen. Die Isolationshaube wird über einen Auslegearm und einen Adapterring am Außenumfang einer Teilform angeschlossen. Die Vorrichtung soll beliebige Teilformen von Vulkanisationsformen ohne Abwarten bis zum Auskühlen der Formen reinigen können. Zudem soll der Strahl- bzw. Reinigungsbereich abgekapselt werden.From the DE 199 36698 C1 a device for cleaning vulcanization molds is known. The device has a multi-axially movable blasting device and a manipulation device. The blasting device and the manipulation device are received by an insulation hood. The insulation cover is connected via a support arm and an adapter ring on the outer circumference of a part mold. The device is intended to clean any part of molds without waiting until the molds cool down. In addition, the blasting or cleaning area should be encapsulated.

Die FR-A-2 837 122 offenbart eine Vorrichtung und ein Verfahren zum Reinigen bzw. zum Abbeizen von Oberflächen. Die zu reinigenden Oberflächen können aus Metallen oder Verbundwerkstoffen ausgebildet sein. Bei diesem Verfahren ist vorgesehen, die Oberflächen mittels Druckluft und cryogenem CO2 zu reinigen. Um die Reinigungswirkung zu verbessern wird das cryogene CO2 mit einem Zusatz aus synthetischen oder mineralischen Partikeln versehen. Die synthetischen Zusätze können beispielsweise aus Talk oder mit Harz umhüllten Recyclingabfall ausgebildet sein. Mit diesem Verfahren sollen Beschichtungen, wie z.B. Farbe, Antikorrosionsfarbe, Staub bzw. Schleifstaub und natürliche Verunreinigungen, wie Fette entfernt werden.The FR-A-2 837 122 discloses an apparatus and method for cleaning or ablating surfaces. The surfaces to be cleaned may be formed of metals or composites. In this method, it is intended to clean the surfaces by means of compressed air and cryogenic CO 2 . To improve the cleaning effect, the cryogenic CO 2 is provided with an additive of synthetic or mineral particles. The synthetic additives may be formed, for example, from talc or resin-wrapped recycling waste. With this method, coatings, such as paint, anti-corrosion paint, dust or grinding dust and natural impurities, such as fats are to be removed.

In der DE 102 33 304 A1 ist ein Verfahren und eine Vorrichtung zum Entfernen von Dünnfilm- und Dünnschicht-Verschmutzungen auf festen Oberflächen beschrieben. Dabei wird einem Trockeneisluftstrahl flüssiges Reinigungsmittel derart zugesetzt, dass es zeitgleich mit dem Trockeneisluftstrahl auf einer zu reinigenden Oberfläche auftrifft. Der Reinigungsmittelzusatz soll den Reinigungsvorgang beschleunigen und verbessern. Dadurch soll das Trockeneisstrahlgut nur sehr kurz auf eine zu reinigende Oberfläche gerichtet werden, wodurch die Kältespannungen des zu reinigenden Objekts verringert werden und damit auch für empfindliche Materialien beherrschbar werden. Auf diese Weise sollen auch sensible Oberflächen, wie z.B. Glas, effektiv und schadensfrei gereinigt werden. Das Reinigungsmittel kann an verschiedenen Stellen der Vorrichtung dem Trockeneisluftstrahl zugeführt werden.In the DE 102 33 304 A1 A method and apparatus for removing thin film and thin film contaminants on solid surfaces is described. In this case, a dry-ice air jet liquid detergent is added so that it impinges on a surface to be cleaned at the same time with the dry ice air jet. The detergent additive is intended to speed up and improve the cleaning process. As a result, the dry ice blasting material should only be aimed very briefly at a surface to be cleaned, as a result of which the cold stresses of the object to be cleaned are reduced and thus also manageable for sensitive materials. In this way, even sensitive surfaces, such as glass, are cleaned effectively and without damage. The cleaning agent can be supplied to the dry ice air jet at various points of the device.

Aus der GB-A-2 145 643 geht eine Vorrichtung und ein Verfahren zum Reinigen von Maschinen und Vorrichtungen in Kernkraftwerken durch abrasive Bestrahlung hervor. Dabei ist vorgesehen Trockeneispartikel auf die zu reinigende Oberfläche aufzubringen. Den Trockeneispartikeln können Eispartikel und/oder oberflächenaktive Zusätze beigemischt sein, um zu verhindern, dass die gelösten Teilchen sich in der Atmosphäre verteilen. Insbesondere sollen gelöste kontaminiert Partikel im Schmelzwasser gebunden werden, wodurch die Entfernung kontaminierter Partikel vereinfacht werden soll.From the GB-A-2 145 643 For example, an apparatus and method for cleaning machinery and apparatus in nuclear power plants by abrasive irradiation is disclosed. It is intended to apply dry ice particles to the surface to be cleaned. The dry ice particles may be mixed with ice particles and / or surface-active additives to prevent the dissolved particles from spreading in the atmosphere. In particular, dissolved contaminated particles are to be bound in the melt water, whereby the removal of contaminated particles should be simplified.

In der WO 99/03640 ist eine Vorrichtung und ein Verfahren zum abrasiven Schneiden beschrieben. Das Verfahren ist insbesondere zum Schneiden von empfindlichen Materialien, wie z.B. Sprengstoff, vorgesehen. Dabei wird in einem Vorratstank eine erste Flüssigkeit unter Umgebungstemperatur abgekühlt, die gekühlte Flüssigkeit wird dann mit Druck beaufschlagt und in Form eines Strahls ausgegeben. Dem Strahl wird eine zweite Flüssigkeit zugeführt, um feste abrasiv wirkende Partikel im Düsenkörper zu bilden. Diese Partikel sollen den Schneidvorgang ausführen, ohne das eine Sprengung ausgelöst wird.In the WO 99/03640 An apparatus and method for abrasive cutting is described. The method is particularly intended for cutting sensitive materials such as explosives. In this case, a first liquid is cooled below ambient temperature in a storage tank, the cooled liquid is then pressurized and discharged in the form of a jet. The jet is supplied with a second liquid to form solid abrasive particles in the nozzle body. These particles are to perform the cutting process without causing a blast.

Weitere Vorrichtungen zur Reinigung mit Trockeneis sind von der Linde AG bekannt. Diese arbeiten im wesentlichen nach 2 unterschiedlichen Prinzipien, den Druckstrahlgeräten mit 1-Schlauch-System und den Geräten mit Ansaugprinzip mit 2-Schlauch-System.Further devices for cleaning with dry ice are known from Linde AG. These work essentially according to 2 different principles, the pressure jet devices with 1-hose system and the devices with suction principle with 2-hose system.

Bei den 1-Schlauch-Strahlsystemen werden über eine rotierende Luftschleuse reiskorngroße Pellets vom Vorratsbehälter der Maschine in einen Drucktuftstrom zudosiert, in Richtung einer Strahlpistole davongetragen und schließlich in einer Lavaldüse auf annähernd Schallgeschwindigkeit beschleunigt. Die Pellets prallen dann auf die zu reinigende Oberfläche.In the case of the 1-hose jet systems, rice-grain-sized pellets are metered from the storage container of the machine into a stream of compressed air via a rotating air lock, carried in the direction of a blasting gun and finally accelerated to a speed of sound in a Laval nozzle. The pellets then bounce on the surface to be cleaned.

Die 2-Schlauch-Strahlsysteme verwenden das Ansaugprinzip. Ein Druckluftstrom erzeugt ein partielles Vakuum in einer Strahlpistole. Das Trockeneisgranulat wird vom Vorratsbehälter des Gerätes über eine Dosierschnecke in einen Ansaugbereich transportiert. Dort werden die Pellets vom Unterdruck im Strahlschlauch mitgerissen und zu einer Venturidüse befördert, von wo aus sie in Richtung des Reinigungsziels beschleunigt werden.The 2-hose blasting systems use the suction principle. A stream of compressed air creates a partial vacuum in a blasting gun. The dry ice granules are transported from the storage container of the device via a dosing screw into a suction area. There, the pellets are entrained by the negative pressure in the blasting hose and transported to a Venturi nozzle, from where they are accelerated in the direction of the cleaning target.

Beim Beschuss mit Trockeneispellets entstehen mehrere vorteilhafte Effekte. Neben dem zunächst erfolgenden mechanischen Abtragen von Verunreinigungen durch Abrasion ergibt sich eine starke punktuelle Abkühlung des bestrahlten Bereiches, wodurch die Verunreinigungen, besonders bei Kunststoffresten in Kunststoffformen, verspröden und sich leichter entfernen lassen. Zudem entsteht beim Aufprall der Trockeneispellets auf die Oberfläche unter Atmosphärendruck der bereits genannte Übergang des Trockeneises in den gasförmigen Zustand, wobei eine ca. 700fache Volumenvergrößerung des Trockeneises stattfindet. Die dadurch entstehenden Gaswirbel sind in der Lage, die unterkühlten und versprödeten Verunreinigungen auszublasen, ohne den Untergrund oder die Oberfläche selbst zu beschädigen.When bombarded with dry ice pellets, several beneficial effects occur. In addition to the initial mechanical removal of contaminants by abrasion results in a strong selective cooling of the irradiated area, whereby the impurities, especially in plastic remnants in plastic molds, become brittle and easier to remove. In addition, when the dry ice pellets hit the surface under atmospheric pressure, the already-mentioned transition of the dry ice into the gaseous state occurs, whereby an approximate 700-fold increase in the volume of dry ice takes place. The resulting gas vortices are able to blow out the supercooled and embrittled impurities without damaging the substrate or the surface itself.

Manchmal ist es von Nachteil bei den bekannten Verfahren zur Reinigung von Vulkanisationsformen oder anderen Formen zur Kunststoffformgebung mit Trockeneis, dass zu sauber gereinigt wird. Das heißt nach dem Reinigen einer Vulkanisationsform fehlt eine "Restverunreinigung" oder "Rückverunreinigung" in den Formen, dies kann zu einem Ausschuss beim Wiederanfahren der Maschinen führen. Um dieses Problem zu beheben wird oftmals nach dem Reinigen eine Trennmittelschicht in die Formen eingebracht. Diese Trennmittelschicht soll ein Anhaften der Kunststoffteile in den Formen verhindern. Die Dicke der Trennmittelschicht kann aber nicht genau festgelegt werden, daher kommt es beim Wiederanfahren der Maschinen zunächst zu einer Produktion von Ausschussteilen, da meistens eine zu dicke Trennmittelschicht aufgebracht wird. In vielen Fällen sind die Formen nach dem nachträglichern Aufbringen der Trennmittelschicht vollständig ausgekühlt, was zu einem zeitlichen Mehraufwand führt, da die Formen vor dem Anfahren erst wieder vollständig aufgeheizt werden müssen.Sometimes it is disadvantageous in the known methods for cleaning vulcanization molds or other forms for plastic molding with dry ice that is cleaned too clean. That is, after cleaning a vulcanization mold, there is a lack of "residual contamination" or "back-contamination" in the molds, which can lead to broke when restarting the machines. To remedy this problem, a release agent layer is often introduced into the molds after cleaning. This release agent layer is intended to prevent adhesion of the plastic parts in the molds. However, the thickness of the release agent layer can not be determined exactly, so it comes when restarting the machine first to a production of rejects, since usually too thick release agent layer is applied. In many cases, the molds are completely cooled after the subsequent application of the release agent layer, which leads to a temporal overhead, since the molds must first be fully heated before starting again.

Aufgabe der Erfindung ist es ein Verfahren bereitzustellen, mit dem es möglich ist, dass Formen schnell gereinigt werden können und dass zuverlässig verhindert wird, dass nach dem Reinigen neue Kunststoffformteile an der Form anhaften.The object of the invention is to provide a method with which it is possible that molds can be cleaned quickly and that it is reliably prevented that new plastic moldings adhere to the mold after cleaning.

Die Aufgabe wird mit einem Verfahren mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a method having the features of claim 1.

Vorteilhafte Weiterbildungen sind in den jeweiligen Unteransprüchen angegeben.Advantageous developments are specified in the respective subclaims.

Erfindungsgemäß ist ein Verfahren zum Reinigen von Formen zur Kunststoffformgebung, insbesondere PUR-Formteile, mit Trockeneis vorgesehen, wobei das Trockeneis aus einem Vorratsbehälter gefördert wird, über eine Mischeinheit dosiert und/oder mit Pressluft gemischt wird. Das Trockeneis wird zusammen mit einem Trennmittel auf eine zu reinigende Oberfläche gestrahlt.According to the invention, a method is provided for cleaning molds for plastic molding, in particular PUR moldings, with dry ice, wherein the dry ice is conveyed from a storage container, metered via a mixing unit and / or mixed with compressed air. The dry ice is blasted together with a release agent on a surface to be cleaned.

Mittels des erfindungsgemäßen Verfahrens wird eine Trennmittelschicht auf der Oberfläche der Form aufgetragen. Hierbei wird ein Teil des aufgetragenen Trennmittels wiederum durch das auf die Oberfläche treffende Trockeneis wieder entfernt. Hierdurch entsteht ein Gleichgewichtszustand zwischen Auf- und Abtragung des Trennmittels. Dies führt dazu, dass das Trennmittel in einer sehr dünnen Schicht aufgetragen wird, die es erlaubt, die Form ohne weitere Behandlung und Verzögerung sofort zum Herstellen eines weiteren Kunststoffformteils zu verwenden, das nach der Herstellung leicht aus der Form entfernt werden kann.By means of the method according to the invention, a release agent layer is applied to the surface of the mold. Here, a part of the applied release agent is again removed by the hitting the surface of dry ice. This creates a state of equilibrium between applying and removing the release agent. This results in that the release agent is applied in a very thin layer, which allows the mold to be used immediately without further treatment and delay for the production of a further plastic molding which can be easily removed from the mold after manufacture.

Mit der Erfindung wird somit der Ausschuss an Kunststoffformteilen erheblich vermindert und die Produktion kann wesentlich schneller wieder aufgenommen werden.With the invention, the rejection of plastic moldings is thus significantly reduced and the production can be resumed much faster.

Durch das erfindungsgemäße Verfahren ist es möglich die Formen ohne Ausbau aus den Maschinen und ohne dass die Formen vollständig auskühlen zu Reinigen, was zu einer erheblichen Zeitersparnis führt.By means of the method according to the invention it is possible to clean the molds without removing them from the machines and without completely cooling the molds, which leads to a considerable saving of time.

Der Zeitaufwand beim Anfahren ist sehr gering, da die Formen nach dem Reinigen nur geringfügig abgekühlt sind und somit weniger Energie und Zeit zum Aufheizen erforderlich ist.The time required for startup is very low, since the molds are only slightly cooled after cleaning and thus less energy and time is required for heating.

Auf den Einsatz von zusätzlichem Reinigungsmittel kann verzichtet werden.The use of additional detergent can be dispensed with.

Die Erfindung wird beispielhaft anhand der Zeichnungen erläutert. Es zeigen dabei schematisch.

Figur 1:
eine Seitenansicht einer Vorrichtung zur durchführung des erfindungsgemäßen Verfahrens
Figur 2:
eine Seitenansicht einer weiteren Ausführungsform der Vorrichtung.
The invention will be explained by way of example with reference to the drawings. It show schematically.
FIG. 1:
a side view of an apparatus for carrying out the method according to the invention
FIG. 2:
a side view of another embodiment of the device.

Die Vorrichtung 1 zum Reinigen von Formen weist einen Vorratsbehälter 2 zum Aufnehmen und Speichern von Trockeneis auf. Der Vorratsbehälter 2 ist in der Draufsicht quadratisch ausgebildet. Weiterhin weist der Vorratsbehälter 2 eine Bodenwandung 3, zwei Seitenwandungen 4, eine Vorderwandung 5 und eine Rückwandung 6 auf. Auf der Oberseite ist eine Klappe 7 zum Einbringen des Trockeneises ausgebildet. Die Vorderwandung 5 ist schräg in einem Winkel von etwa 60° gegenüber der Bodenwandung 3 angeordnet.The mold cleaning apparatus 1 comprises a reservoir 2 for storing and storing dry ice. The reservoir 2 is square in plan view. Furthermore, the storage container 2 has a bottom wall 3, two side walls 4, a front wall 5 and a rear wall 6. On the top of a flap 7 is formed for introducing the dry ice. The front wall 5 is arranged obliquely at an angle of about 60 ° relative to the bottom wall 3.

Die Bodenwandung 3 weist einen trichterförmigen Einfüllstutzen 8 auf, der den Vorratsbehälter 2 mit einer Dosierscheibe 9 verbindet. Der Einfüllstutzen 8 ist als Ventil 8 mit einem irisförmigen Öffnungsmechanismus ausgebildet. Über den Einfüllstutzen 8 gelangt das Trockeneis in die Dosiereinheit 9.The bottom wall 3 has a funnel-shaped filler neck 8, which connects the reservoir 2 with a metering 9. The filler neck 8 is formed as a valve 8 with an iris-shaped opening mechanism. About the filler neck 8, the dry ice enters the metering unit. 9

Die Dosierscheibe 9 ist unterhalb des Vorratsbehälters 2 angeordnet. Die Dosierscheibe 9 weist beispielsweise 16 zylindrische Durchgangsbohrungen 10 auf. Über den Einfüllstutzen 8 werden die Durchgangsbohrungen 10 in einer Position 11 unterhalb des Einfüllstutzen 8 mit Trockeneis befüllt. Ein Elektromotor versetzt die Dosierscheibe 9 in eine gleichförmige Drehbewegung um die Durchgangsbohrungen 10 vom Einfüllstutzen 8 zu einer Pressluftleitung 12 zu überführen.The metering disk 9 is arranged below the storage container 2. The metering disk 9 has, for example, 16 cylindrical through-holes 10. About the filler neck 8, the through holes 10 are filled in a position 11 below the filler neck 8 with dry ice. An electric motor sets the dosing disc 9 in a uniform rotational movement to the through holes 10 from the filler neck 8 to a compressed air line 12 to transfer.

Die Pressluftleitung 12 weist eine Unterbrechung 13 auf, in der die Dosierscheibe 9 angeordnet ist. Beim Drehen der Dosierscheibe kann jeweils eine Durchgangsbohrung 10 in Flucht mit der Pressluftleitung 12 angeordnet werden. Die Pressluftleitung 12 entleert die Durchgangsbohrungen 10 der Dosierscheibe 9 und beschleunigt das darin enthaltene Trockeneis, das heißt die Dosierscheibe 9 dosiert Trockeneis in einen in der Pressluftleitung 12 strömenden Pressluftstrom 14. Unterhalb des Bereichs 13 der Dosierscheibe 9 setzt sich die Pressluftleitung 12 fort.The compressed air line 12 has an interruption 13, in which the metering 9 is arranged. When rotating the dosing one through hole 10 can be arranged in alignment with the compressed air line 12 in each case. The compressed air line 12 empties the through holes 10 of the metering disc 9 and accelerates the dry ice contained therein, that is, the metering 9 dosed dry ice into a flowing in the compressed air line 12 compressed air flow 14. Below the range 13 of the metering 9, the compressed air line 12 continues.

Über eine Trennmittelpumpe 15 wird ein Düsenring 16 mit Trennmittel aus dem Trennmittelbehälter 17, der an den Abschnitt der Pressluftleitung 12 unterhalb der Dosierscheibe angeschlossen ist, beschickt. Der Düsenring 16 umschließt den Umfang der Pressluftleitung 12 kreisförmig und weist mehrere Düsen auf. Mittels der Düsen des Düsenrings 16 wird das Trockeneis im inneren der Pressluftleitung 12 gleichmäßig mit Trennmittel besprüht bzw. versetzt. Auf diese Weise wird in der Pressluftleitung 12 ein Pressluft-Trockeneis-Trennmittel-Gemisch ausgebildet.About a release agent pump 15, a nozzle ring 16 with release agent from the release agent tank 17, which is connected to the portion of the compressed air line 12 below the dosing, fed. The nozzle ring 16 encloses the circumference of the compressed air line 12 in a circular manner and has a plurality of nozzles. By means of the nozzles of the nozzle ring 16, the dry ice in the interior of the compressed air line 12 is uniformly sprayed or mixed with release agent. In this way, a compressed air-dry ice release agent mixture is formed in the compressed air line 12.

An die Pressluftleitung 12 ist ein Strahlschlauch 18 angeschlossen. Der Strahlschlauch 18 mündet in eine Strahlpistole 19. Die Strahlpistole 19 weist ein mit einem Abzug 20 verbundenes Ventil 21 und eine nach dem Ventil 21 angeordnete Düse 22, beispielsweise eine Lavaldüse 22, auf. Die Lavaldüse 22 beschleunigt das Pressluft-Trockeneis-Trennmittel-Gemisch auf annähernd Schallgeschwindigkeit. Wird das Ventil 21 über den Abzug 20 der Strahlpistole 19 betätigt wird das Pressluft-Trockeneis-Trennmittel-Gemisch ausgegeben und auf eine zu reinigende Oberfläche gelenkt.To the compressed air line 12, a blasting hose 18 is connected. The blasting hose 18 opens into a blasting gun 19. The blasting gun 19 has a valve 21 connected to a trigger 20 and a nozzle 22 arranged downstream of the valve 21, for example a Laval nozzle 22. The Laval nozzle 22 accelerates the compressed air-dry ice release agent mixture to approximately the speed of sound. If the valve 21 is actuated via the trigger 20 of the blasting gun 19, the compressed air-dry ice-separating agent mixture is discharged and directed to a surface to be cleaned.

In einer weiteren Ausgestaltung der Vorrichtung 1 ist der Einfüllstutzen 8 des Vorratsbehälters 2 mit einem Ende einer Dosierschnecke 23 zur Entnahme von Trockeneis aus dem Vorratsbehälter 2 verbunden. Über die Drehzahl der Dosierschnecke 23 lässt sich die Menge des entnommenen Trockeneises steuern.In a further embodiment of the device 1, the filler neck 8 of the storage container 2 is connected to one end of a metering screw 23 for the removal of dry ice from the storage container 2. About the speed of the metering screw 23, the amount of dry ice removed can be controlled.

Das andere Ende der Dosierschnecke 23 mündet in einen Zuführschlauch 24, der mit einer Strahlpistole 25 verbunden ist. Der Zuführschlauch 24 dient zum Transport des Trockeneises in die Strahlpistole 25.The other end of the metering screw 23 opens into a feed tube 24, which is connected to a blasting gun 25. The feed tube 24 serves to transport the dry ice into the blasting gun 25.

Eine Pressluftleitung 26 mündet ebenfalls in die Strahlpistole 25. Im Inneren der Strahlpistole 25 mündet die Pressluftleitung 26 in Längsrichtung in eine Düse 27 zum Beschleunigen der Pressluft. Der Zuführschlauch 24 mündet seitlich in die Düse 27, die eine Mischkammer 27 ausbildet. Durch die durch die Mischkammer 27 strömende Pressluft wird im Zuführschlauch 24 ein Vakuum, erzeugt durch das das Trockeneis in die Mischkammer 27 gesaugt wird.A compressed air line 26 also opens into the blasting gun 25. In the interior of the blasting gun 25, the compressed air line 26 opens in the longitudinal direction in a nozzle 27 for accelerating the compressed air. The feed tube 24 opens laterally into the nozzle 27, which forms a mixing chamber 27. Due to the compressed air flowing through the mixing chamber 27, a vacuum is generated in the feed tube 24, through which the dry ice is sucked into the mixing chamber 27.

Ebenfalls seitlich an die Mischkammer 27 ist eine Trennmitteldüse 28 angeschlossen, die mit einem Trennmittelbehälter 29 über eine Leitung 30 verbunden ist. Über eine Trennmittelpumpe 31 wird die Trennmitteldüse 29 mit Trennmittel aus dem Trennmittelbehälter 29 beschickt. Auf diese weise dosiert die Trennmitteldüse 28 Trennmittel in die Mischkammer 27 zu. Hierdurch wird in der Mischkammer 27 ein Pressluft-Trockeneis-Trennmittel-Gemisch ausgebildet.Also at the side of the mixing chamber 27, a release agent nozzle 28 is connected, which is connected to a separating agent container 29 via a line 30. About a release agent pump 31, the release agent nozzle 29 is charged with release agent from the release agent tank 29. In this way, the release agent nozzle 28 metered release agent into the mixing chamber 27. As a result, a compressed air-dry ice release agent mixture is formed in the mixing chamber 27.

An die Mischkammer 28 bzw. das Ende der Düse 27 ist eine Lavaldüse 32 angeschlossen, die das Pressluft-Trockeneis-Trennmittel-Gemisch zusätzlich beschleunigt.
Die Strahlpistole 25 weist einen Abzug 33 und ein Ventil 34 welches im Bereich, in dem die Pressluftleitung 26 in die Strahlpistole 25 mündet, ausgebildet ist. Wird das Ventil 34 über den Abzug 33 der Strahlpistole 25 betätigt, wird das Pressluft-Trockeneis-Trennmittel-Gemisch ausgegeben und auf eine zu reinigende Oberfläche gelenkt.To the mixing chamber 28 and the end of the nozzle 27, a Laval nozzle 32 is connected, which additionally accelerates the compressed air-dry ice release agent mixture.
The blasting gun 25 has a trigger 33 and a valve 34 which is formed in the region in which the compressed air line 26 opens into the blast gun 25. When the valve 34 is actuated via the trigger 33 of the blast gun 25, the compressed air-dry ice-separating agent mixture is discharged and directed to a surface to be cleaned.

Bei beiden Ausführungsformen der Vorrichtung kann das Trennmittel bereits in das Trockeneis integriert bzw. angelagert sein bevor dieses in den Vorratsbehälter 2 eingebracht wird und/oder die Trennmittelzufuhr erfolgt im Vorratsbehälter 2 und/oder der Dosierscheibe 9 bzw. der Dosierschnecke 23 und/oder der Leitung 12, 18, 26, 30 und/oder der Strahlpistole 19, 25 bzw. den darin enthaltenen Düse/n 22, 27, 28, 32.In both embodiments of the device, the release agent may already be integrated or deposited in the dry ice before it is introduced into the reservoir 2 and / or the release agent is supplied in the reservoir 2 and / or the metering 9 and the metering screw 23 and / or the line 12, 18, 26, 30 and / or the blasting gun 19, 25 or the nozzle / s 22, 27, 28, 32 contained therein.

Nachfolgend wird die Anwendung der oben beschriebenen Vorrichtung 1 zum Reinigen von Formen erläutert.Hereinafter, the application of the above-described mold cleaning apparatus 1 will be explained.

Das Trockeneis wird durch die Klappe 7 in den Vorratsbehälter 2 eingebracht. Durch Betätigen des Abzugs 20 öffnet sich das Ventil 21 der Strahlpistole 19. Zunächst strömt Pressluft durch die Pressluftleitung 12 und aus der Strahlpistole 19 aus. Die Pressluft hat einen Druck von etwa 8 bar bis 12 bar und vorzugsweise etwa 10 bar je nach Beschaffenheit der Verschmutzung und der zu reinigenden Form.The dry ice is introduced through the flap 7 in the reservoir 2. By actuating the trigger 20, the valve 21 of the blasting gun 19 opens. First, compressed air flows through the compressed air line 12 and out of the blast gun 19. The compressed air has a pressure of about 8 bar to 12 bar and preferably about 10 bar, depending on the nature of the pollution and the form to be cleaned.

Das Trockeneis gelangt über den geöffneten Einfüllstutzen 8 in eine entsprechende zylindrische Durchgangsbohrung 10 der Dosierscheibe 9. Über den Einfüllstutzen 8 lässt sich die gewünschte Menge an Trockeneis regulieren.The dry ice passes through the open filler neck 8 in a corresponding cylindrical through hole 10 of the dosing 9. About the filler neck 8, the desired amount of dry ice can be regulated.

Der Elektromotor versetzt die Dosierscheibe 9 in eine gleichförmige Drehbewegung und befördert auf diese Weise die mit Trockeneis gefüllte Durchgangsbohrung der Position 11 zur Unterbrechung 13.The electric motor sets the dosing disc 9 in a uniform rotational movement and thus promotes the filled with dry ice through hole of position 11 for interruption 13th

In der Unterbrechung wird das Trockeneis von der Pressluft mitgerissen und beschleunigt.In the interruption, the dry ice is entrained by the compressed air and accelerated.

Die Trennmittelpumpe fördert Trennmittel aus dem Trennmittelbehälter 17, das über die Düsen des Düsenrings 16 in die Pressluftleitung 12 zudosiert wird. Die Düsen des Düsenrings 16 spritzen derart Trennmittel in die Pressluftleitung 12 ein, dass die Oberfläche des vorbeifliegenden Trockeneises nahezu vollständig mit Trennmittel benetzt ist und das Pressluft-Trockeneis-Trennmittel-Gemisch ausgebildet wird. Das Verhältnis Trennmittel zu Trockeneis beträgt in etwa 1:5 bis 1:50 und vorzugsweise 1:10 bis 1:20, entsprechend der Anwendung.The release agent pump delivers release agent from the release agent tank 17, which is metered into the compressed air line 12 via the nozzles of the nozzle ring 16. The nozzles of the nozzle ring 16 inject such a release agent into the compressed air line 12, that the surface of the passing dry ice is almost completely wetted with release agent and the compressed air-dry ice release agent mixture is formed. The ratio of release agent to dry ice is about 1: 5 to 1:50 and preferably 1:10 to 1:20, according to the application.

Das Pressluft-Trockeneis-Trennmittel-Gemisch gelangt von der Pressluftleitung 12 in den Strahlschlauch 18 und durchströmt das über den Abzug 20 geöffnete Ventil 21 der Strahlpistole 19. Über die Düse 22 der Strahlpistole 19 wird das Trockeneis auf annähernd Schallgeschwindigkeit beschleunigt und nimmt auf diese Weise die nötige Energie zum Reinigen einer Oberfläche auf. Von der Strahlpistole 19 aus wird das Pressluft-Trockeneis-Trennmittel-Gemisch auf die zu reinigende Oberfläche gelenkt.The compressed-air-dry-ice release agent mixture passes from the compressed air line 12 into the blasting hose 18 and flows through the valve 21 of the blasting gun 19, which is opened via the trigger 20. The dry ice is accelerated to approximately the speed of sound via the nozzle 22 of the blasting gun 19 and takes in this manner the necessary Energy to clean a surface. From the blasting gun 19 from the compressed air-dry ice-separating agent mixture is directed to the surface to be cleaned.

In einer weitere Ausführungsform des erfindungsgemäßen Verfahrens werden Trockeneis, Pressluft und Trennmittel erst in der Düse 27 der Strahlpistole gemischt und dort das Pressluft-Trockeneis-Trennmittel-Gemisch ausgebildet.In a further embodiment of the method according to the invention, dry ice, compressed air and separating agent are first mixed in the nozzle 27 of the blasting gun and there the compressed air-dry ice-separating agent mixture is formed.

Über den Druck in der Pressluftleitung 26, die zudosierte Menge an Trennmittel und die Beschaffenheit des Trockeneises kann die Schichtdicke des in der Form verbleibenden bzw. aufgebrachten Trennmittels gesteuert bzw. variiert werden.About the pressure in the compressed air line 26, the metered amount of release agent and the nature of the dry ice, the layer thickness of the remaining in the form or applied release agent can be controlled or varied.

Beim erfindungsgemäßen Verfahren kann Trockeneis als Kohlendioxid in Form von Trockeneispellets und auch Trockeneisschnee aus expandiertem flüssigem CO2 verwendet werden.In the process according to the invention, dry ice can be used as carbon dioxide in the form of dry ice pellets and also dry ice snow of expanded liquid CO 2 .

Im Falle von flüssigem Kohlendioxid ist es besonders vorteilhaft, flüssiges Trennmittel mit flüssigem Kohlendioxid vor der Entspannung unter Druck (20 bis 65 bar) im unterkritischen Bereich zu vermischen. Bei der anschließenden Entspannung entsteht eine besonders gleichmäßige Vermischung von CO2-Schnee und TrennmittelIn the case of liquid carbon dioxide, it is particularly advantageous to mix liquid release agent with liquid carbon dioxide before relaxation under pressure (20 to 65 bar) in the subcritical range. In the subsequent relaxation, a particularly uniform mixing of CO 2 snow and release agent

Es kann auch vorgesehen sein zunächst in einem ersten Arbeitsschritt eine Art Vorreinigung, ohne den Zusatz von Trennmittel, vorzunehmen und in einem zweiten Arbeitschritt eine Endreinigung, mit Zusatz von Trennmittel, auszuführen bei der die Trennmittelschicht in gewünschter Dicke auf die Form aufgebracht wird.It may also be provided initially in a first step, a kind of pre-cleaning, without the addition of release agent to make and in a second step a final cleaning, with the addition of release agent to perform in which the release agent layer is applied in the desired thickness to the mold.

Nachfolgend wird die Herstellung von mit Trennmittel versetztem Trockeneis beschrieben.The production of release agent-added dry ice is described below.

Bei der Herstellung des Trockeneises ist vorgesehen dem Trockeneisschnee vor dem Durchdrücken durch Matrizen Trennmittel im Verhältnis 1:5 bis 1:50 und vorzugsweise 1:10 bis 1:20 zuzuführen. Das Trennmittel kann dem Trockeneis als separate Partikel, Flüssigkeit oder Gas zugeführt werden. Auf diese Weise wird das Trennmittel in das Trockeneis integriert und/oder angelagert und/oder beigemischt.In the production of dry ice is provided to the dry ice snow before pushing through dies release agent in the ratio 1: 5 to 1:50 and preferably 1:10 to 1:20 supply. The release agent can be fed to the dry ice as a separate particle, liquid or gas. In this way, the release agent is integrated into the dry ice and / or deposited and / or admixed.

Derart mit Trennmittel versetzter Trockeneisschnee kann genauso wie flüssiges mit Trennmittel versetztes CO2 zum Reinigen verwendet werden.Dry ice snow thus mixed with release agent can be used for cleaning just as liquid release agent-added CO 2 can be used.

In einer weiteren Ausführungsform ist vorgesehen das Trennmittel beim Pelletieren zuzuführen. Dabei wird dem Trockeneis beim Durchdrücken durch die Matrizen in der Matrize, über beispielsweise düsenförmig ausgebildete Öffnungen in der Matrize, Trennmittel als separate feste Partikel oder Flüssigkeit zugeführt. Auf diese Weise wird das Trennmittel ganz oder zumindest Teilweise in die Trockeneispellets integriert und/oder auf deren Oberfläche angelagert.In a further embodiment it is provided to supply the release agent during pelleting. In this case, the dry ice is supplied as a separate solid particles or liquid when pressed through the matrices in the die, for example, nozzle-shaped openings in the die. In this way, the release agent is completely or at least partially integrated into the dry ice pellets and / or deposited on the surface thereof.

In einer weiteren Ausführungsform wird den Trockeneispellets nach dem Pelletieren Trennmittel als separate Partikel, Flüssigkeit oder Gas zugeführt. Auf diese Weise wird das Trennmittel ganz oder zumindest Teilweise auf der Oberfläche der Trockeneispellets angelagert bzw. beigemischt.In another embodiment, the dry ice pellets are fed after pelletizing release agent as a separate particle, liquid or gas. In this way, the release agent is completely or at least partially deposited or mixed on the surface of the dry ice pellets.

Auch eine Kombination der oben genannten Herstellungsverfahren ist möglich.A combination of the above manufacturing methods is possible.

Beim Reinigen mit dem erfindungsgemäßen Verfahren wird die Schmutzschicht auf der Form entfernt und zugleich eine Schicht aus frischem Trennmittel an der Form aufgebaut bzw. appliziert werden. Diese Schicht wird vom Trockeneis durch das Gleichgewicht zwischen Aufbringen und Abtragen nur in geringem Ausmaß wieder entfernt und verbleibt durch Wahl des Strahldruckes in der gewünschten Dicke in der Form. Die Dicke der Trennmittelschicht beträgt etwa 10 µm bis 120 µm und vorzugsweise 30 µm bis 50 µm.When cleaning with the method according to the invention, the dirt layer is removed on the mold and at the same time a layer of fresh release agent is built up or applied to the mold. This layer is removed from the dry ice by the balance between application and removal only to a small extent again and remains by choosing the jet pressure in the desired thickness in the mold. The thickness of the release agent layer is about 10 μm to 120 μm and preferably 30 μm to 50 μm.

Durch das erfindungsgemäße Verfahren ist es möglich die Formen ohne Ausbau aus den Maschinen und ohne dass die Formen vollständig auskühlen zu Reinigen, was zu einer erheblichen Zeitersparnis führt. Mittels des erfindungsgemäßen Verfahrens kann eine Trennmittelschicht, durch das Gleichgewicht beim gleichzeitigen Reinigen bzw. Abtragen und Benetzen mit Trennmittel bzw. Aufbringen, in der erforderlichen Dicke auf einer Innenoberfläche einer Form erzeugt werden. Dadurch wird Zeit eingespart, da die Trennmittelschicht nicht separat aufgetragen werden muss und was viel wichtiger ist, der Ausschuss bis die Produktion nach der Reinigung wieder kontinuierlich verläuft verringert sich, da weniger Teile durch die falsche Trennmitteldicke Trennmittels zum Ausschuss werden. Bei einer zu dicken Trennmittelschicht weisen die Formteile nicht die gewünschte Oberfläche auf und bei einer zu dünnen Trennmittelschicht haften die Teile in den Formen, wodurch sie beim Auslösen zerstört werden. Beim erfindungsgemäßen Verfahren wird eine Schicht aus frischem Trennmittel an der Form aufgebaut, welche vom Trockeneis nur in geringem Ausmaß wieder entfernt wird und so als Schutzschicht in der Form verbleibt um diese Probleme zu vermeiden.By means of the method according to the invention it is possible to clean the molds without removing them from the machines and without completely cooling the molds, which leads to a considerable saving of time. By means of the method according to the invention, a release agent layer can be produced by the equilibrium during simultaneous cleaning or removal and wetting with release agent or application, in the required thickness on an inner surface of a mold. This saves time because the release agent layer does not have to be applied separately and what much more importantly, the rejects are reduced until the production runs continuously again after cleaning because fewer parts are rejected by the wrong release agent thickness release agent. If the release agent layer is too thick, the moldings do not have the desired surface, and if the release agent layer is too thin, the parts stick in the molds, destroying them upon release. In the method according to the invention, a layer of fresh release agent is built up on the mold, which is removed only to a small extent by the dry ice and thus remains in the mold as a protective layer in order to avoid these problems.

Das erfindungsgemäße Verfahren kann wie folgt kurz zusammengefasst werden.The process according to the invention can be briefly summarized as follows.

Erfindungsgemäß ist ein Verfahren zum Reinigen von Formen mit Trockeneis nach Anspruch 1 vorgesehen, wobei das Trockeneis aus einem Vorratsbehälter gefördert wird, über eine Mischeinheit dosiert und/oder mit Pressluft gemischt wird. Das Trockeneis wird zusammen mit einem Trennmittel auf eine zu reinigende Oberfläche gestrahlt.According to the invention, a method for cleaning molds with dry ice according to claim 1 is provided, wherein the dry ice is conveyed from a storage container, metered via a mixing unit and / or mixed with compressed air. The dry ice is blasted together with a release agent on a surface to be cleaned.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Vorrichtungcontraption
22
Vorratsbehälterreservoir
33
Bodenwandungbottom wall
44
Seitenwandungsidewall
55
Vorderwandungfront wall
66
RückenwandungRückenwandung
77
Klappeflap
88th
Einfüllstutzenfiller pipe
99
Dosierscheibemetering
1010
DurchgangsbohrungThrough Hole
1111
BereichArea
1212
PressluftleitungCompressed air line
1313
BereichArea
1414
PressluftstromCompressed air power
1515
TrennmittelpumpeRelease agent pump
1616
Düsenringnozzle ring
1717
TrennmittelbehälterRelease agent container
1818
Strahlschlauchray tube
1919
Strahlpistoleblasting gun
2020
Abzugdeduction
2121
VentilValve
2222
Düsejet
2323
Dosierschneckedosing screw
2424
Zuführschlauchfeeding tube
2525
Strahlpistoleblasting gun
2626
PressluftleitungCompressed air line
2727
Düsejet
2828
TrennmitteldüseTrennmitteldüse
2929
TrennmittelbehälterRelease agent container
3030
Leitungmanagement
3131
TrennmittelpumpeRelease agent pump
3232
Venturidüseventuri
3333
Abzugdeduction
3434
VentilValve

Claims (8)

  1. Process for cleaning moulds for moulding plastics with dry ice, the dry ice being extracted from a reservoir (2), dosed by means of a mixing unit and/or mixed with compressed air, characterized in that the dry ice is blasted onto a surface to be cleaned of the mould for moulding plastics together with a release agent, so that a layer of release agent is produced by the equilibrium between the cleaning of the surface and the application of the release agent.
  2. Process for cleaning moulds with dry ice according to Claim 1, characterized in that the layer of release agent is produced in a thickness of 10 µm to 120 µm and preferably 30 µm to 50 µm.
  3. Process for cleaning moulds with dry ice according to Claim 1 or 2, characterized in that the release agent is integrated in the dry ice and/or attached to the dry ice and/or admixed with the dry ice.
  4. Process for cleaning moulds with dry ice according to one of Claims 1 to 3, characterized in that CO2 pellets are provided as the dry ice.
  5. Process for cleaning moulds with dry ice according to one of Claims 1 to 4, characterized in that CO2 snow is provided as the dry ice.
  6. Process for cleaning moulds with dry ice according to one of Claims 1 to 5, characterized in that the release agent is solid.
  7. Process for cleaning moulds with dry ice according to one of Claims 1 to 6, characterized in that the release agent is liquid.
  8. Process for cleaning moulds with dry ice according to one of Claims 1 to 7, characterized in that the mould is used directly after the cleaning and the application of the layer of release agent for producing a further plastic moulding without any further treatment or delay.
EP07020862A 2007-06-27 2007-10-24 Process for cleaning moulds with dry ice Not-in-force EP2008770B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007029724A DE102007029724A1 (en) 2007-06-27 2007-06-27 Apparatus and method for cleaning molds with dry ice

Publications (2)

Publication Number Publication Date
EP2008770A1 EP2008770A1 (en) 2008-12-31
EP2008770B1 true EP2008770B1 (en) 2010-10-06

Family

ID=38694844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07020862A Not-in-force EP2008770B1 (en) 2007-06-27 2007-10-24 Process for cleaning moulds with dry ice

Country Status (3)

Country Link
EP (1) EP2008770B1 (en)
AT (1) ATE483552T1 (en)
DE (2) DE102007029724A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016011808B4 (en) 2016-09-30 2024-05-02 Messer Se & Co. Kgaa Method for treating a surface with a blasting agent

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044799B3 (en) * 2009-12-07 2010-12-09 Draftex Automotive Gmbh Method for treatment of surface of vulcanization-or injection casting mold for manufacturing sealing strip for sealing window pane against door in automobile, involves radiating mold surface with granular radiation unit
WO2015035479A1 (en) * 2013-09-13 2015-03-19 Angelova Lora Method and set for cleaning surfaces using dry ice in combination with abrasive material, acomplete set for cleaning surface and a method of using the set
EP2926951B1 (en) 2014-04-01 2016-10-05 Technische Universität Kaiserslautern Methods for simultaneously cleaning and activating component surfaces by means of a combination of carbon dioxide snow jets and the application of adhesive substances
CN112476251A (en) * 2020-11-26 2021-03-12 德清县益明机械配件有限公司 Quick nondestructive rust cleaning device is used in machine parts production
CN113733466B (en) * 2021-09-01 2023-03-24 江苏国亨车业有限公司 Automobile injection mold with efficient cleaning structure and using method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655847A (en) 1983-09-01 1987-04-07 Tsuyoshi Ichinoseki Cleaning method
GB9715014D0 (en) 1997-07-18 1997-09-24 Secr Defence Two phase cutting device
DE19936698C1 (en) 1999-08-04 2000-12-21 Continental Ag Dry ice blasting of tire molds is carried out by cleaning trolley carrying hood, adapter ring and jet blasting equipment on manipulator arm in fully enclosed configuration
FR2837122A1 (en) 2002-03-15 2003-09-19 Aero Strip Cleaning aircraft engine and control surfaces of grease, and the like, uses a compressed air stream containing dry ice particles together with added synthetic/mineral particles
DE10233304B4 (en) 2002-07-22 2005-11-10 Unique Cleaning Systems Gmbh Method and apparatus for removing thin film and thin film contaminants on solid surfaces
WO2006000274A1 (en) * 2004-06-24 2006-01-05 Jens Werner Kipp Device and method for feeding liquid carbon dioxide
US20070178811A1 (en) * 2006-02-01 2007-08-02 Meenakshi Sundaram Dry ice blasting with chemical additives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016011808B4 (en) 2016-09-30 2024-05-02 Messer Se & Co. Kgaa Method for treating a surface with a blasting agent

Also Published As

Publication number Publication date
EP2008770A1 (en) 2008-12-31
ATE483552T1 (en) 2010-10-15
DE102007029724A1 (en) 2009-01-08
DE502007005269D1 (en) 2010-11-18

Similar Documents

Publication Publication Date Title
EP2008770B1 (en) Process for cleaning moulds with dry ice
EP2151300B1 (en) Device and method for cleaning objects using dry snow
DE69727219T2 (en) METHOD FOR SPIN BLASTING WITH ICE
DE10102924C1 (en) Blasting treatment process for hard surfaces involves applying at least one auxiliary energy pulse to blasting medium
EP3733308B1 (en) Method and device for surface finishing
WO2013064534A1 (en) Apparatus for the preparation of particulate auxiliary material
EP0004106B1 (en) Method and apparatus for surface treatment of workpieces
EP2091718A2 (en) Device and method for transporting excess particulate material on the construction of models
DE10041309C2 (en) Coating device and method for coating with a powdered mold release agent
EP4197659A1 (en) Method and device for cleaning a jet engine
WO2011057612A1 (en) Method and device for coating components
DE19636305C1 (en) Method for removal of coatings or linings from surfaces
DE1948999C3 (en) Device for the production of solid or foamed molded parts from rapidly reacting chemical components
DE102016223244A1 (en) Method and apparatus for generative manufacturing of a three-dimensional object and three-dimensional object
DE102020000018A1 (en) Method and device for manufacturing a cryogenically-acting blasting agent, as well as method and device for cleaning components with the cryogenically-mechanically acting blasting agent
DE3214858C2 (en) Device for the production of molds and cores
EP2058104A2 (en) Method for manufacturing transport palettes from plastic
DE102017103757B4 (en) Method and device for producing fiber-reinforced plastic molded parts
DE10162151B4 (en) Method and device for deburring molded parts
EP2230004A1 (en) Cascade-type coating device for powdery material, and related method
EP3984697A1 (en) Device and method for cleaning surfaces using co2 particles
DE854762C (en) Procedure and arrangement for the internal protection of pipes
EP2961569A1 (en) Device and method for particle blasting by means of frozen gas particles
DE2823578A1 (en) Used moulding sand regeneration - utilising ascending air stream protecting sand through expansion space before impinging on disc
DE19857306C2 (en) Method and device for blowing solid particles into a shaft furnace

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20081126

17Q First examination report despatched

Effective date: 20090513

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LINDE AG

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RTI1 Title (correction)

Free format text: PROCESS FOR CLEANING MOULDS WITH DRY ICE

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 502007005269

Country of ref document: DE

Date of ref document: 20101118

Kind code of ref document: P

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20101006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20101006

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

BERE Be: lapsed

Owner name: LINDE A.G.

Effective date: 20101031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110106

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110206

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110207

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110117

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101031

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

26N No opposition filed

Effective date: 20110707

PLAA Information modified related to event that no opposition was filed

Free format text: ORIGINAL CODE: 0009299DELT

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

R26N No opposition filed (corrected)

Effective date: 20110707

RIN2 Information on inventor provided after grant (corrected)

Inventor name: HELKER, ROLF

Inventor name: REBHAN, DIETER

Inventor name: WUERTZ, PETER, DR.

Inventor name: BLANKE, MARTIN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502007005269

Country of ref document: DE

Effective date: 20110707

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101206

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101024

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110407

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101006

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20171018

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20170926

Year of fee payment: 11

Ref country code: CH

Payment date: 20171013

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502007005269

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 483552

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181024