EP0935111A1 - Process and apparatus for drying biopolymer capsules, in particular soft gelatin capsules - Google Patents

Process and apparatus for drying biopolymer capsules, in particular soft gelatin capsules Download PDF

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Publication number
EP0935111A1
EP0935111A1 EP98810085A EP98810085A EP0935111A1 EP 0935111 A1 EP0935111 A1 EP 0935111A1 EP 98810085 A EP98810085 A EP 98810085A EP 98810085 A EP98810085 A EP 98810085A EP 0935111 A1 EP0935111 A1 EP 0935111A1
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EP
European Patent Office
Prior art keywords
drying
tube
capsules
drying tube
opening
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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.)
Granted
Application number
EP98810085A
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German (de)
French (fr)
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EP0935111B1 (en
Inventor
Peter Greither
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.)
Swiss Caps Rechte und Lizenzen AG
Original Assignee
SCA Lohnherstellungs AG
Swiss Caps AG
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Publication date
Application filed by SCA Lohnherstellungs AG, Swiss Caps AG filed Critical SCA Lohnherstellungs AG
Priority to EP19980810085 priority Critical patent/EP0935111B1/en
Priority to DE59808446T priority patent/DE59808446D1/en
Publication of EP0935111A1 publication Critical patent/EP0935111A1/en
Application granted granted Critical
Publication of EP0935111B1 publication Critical patent/EP0935111B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0436—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis comprising multiple stages, e.g. multiple rotating drums subsequently receiving the material to be dried; Provisions for heat recuperation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0463—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
    • F26B11/0477—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum
    • F26B11/0481—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum the elements having a screw- or auger-like shape, or form screw- or auger-like channels

Definitions

  • the invention relates to a method and an apparatus for Drying capsules made of a biopolymer, in particular Soft gelatin capsules, according to the generic term of the independent Claims 1 and 3, respectively.
  • Capsules made of biopolymer material come in different Areas needed, especially in the pharmaceutical industry, in Food area etc.
  • the capsules contain depending on the Manufacturing method immediately after encapsulating the Ingredient has a relatively high moisture content and must therefore be subjected to a drying process. This applies particularly to the Rotary-Die method, in which two Endless gelatin strips in the gusset brought together by two form rollers become. Between these form rollers, the Capsules after the filling process are their outer contour, however not yet dimensionally stable.
  • the capsules were previously in one Pre-dried tumbler, which consists of a rotating and perforated Drum exists.
  • a major disadvantage of these known methods is in that a continuous drying process is not is possible. While the capsule production is continuous or can be done in very short cycle times, must be discontinuous be dried, taking the dimension of the tumbler constructive limits are set. In addition, the Cleaning the perforated tumbler drums is complex and that Movement behavior of the capsules is during operation of the tumbler uncontrollable. It is therefore an object of the invention a method or an apparatus of the aforementioned Way to create capsules continuously and gently to be able to dry. The drying process should do this have a positive effect on the shape of the capsules and the The device is said to be easy to clean or easy to clean Batches can be converted. Finally, with the existing one Desiccant achieved the highest possible efficiency become.
  • this task is performed with a Method according to claim 1 and in device Regarded solved with a device according to claim 3.
  • the Drying tube rotating about its longitudinal axis also conveys With the help of the mechanical conveying means arranged therein Capsules continuously from an inlet side to an outlet side.
  • the drying tube can thus be constantly fresh Capsules are loaded.
  • the drying agent, preferably tempered, dried air is in cocurrent or countercurrent to the capsules in the longitudinal direction through the Pipe led. This not only ensures a large inflow area on the capsules, but also allows one closed air flow and optimal energy evaluation.
  • the means of funding is advantageously a continuous one Auger. In this way, one becomes specific Capsule quantity screwed forward between two flights of the screw and gently kept moving.
  • the feed screw could also individual feed blades be arranged on the inner tube jacket. It is particularly advantageous the tube jacket closed so that the capsules on a unroll as smooth a surface as possible and the desiccant cannot escape between the two pipe ends.
  • Certain use cases could be individual sections of the pipe jacket also with a perforation or with slits be provided.
  • the drying tube and preferably also the screw conveyor consist of plastic material.
  • Plastic pipes are as finished products in different diameters and Qualities available and can be easily edited and handle.
  • the screw conveyor can also formed by a web of plastic material be welded to the inside wall of the drying tube becomes.
  • the tube jacket of the drying tube can be at least one have closable opening through which the inside is easily accessible for cleaning purposes. If the lid this opening is made of transparent material also observe the material flow in the company.
  • the drying tube can be on one of several storage rolls existing bearing block, of which at least one is connected to a drive device.
  • the pipe is thus stored loosely and can be lifted out at any time.
  • the outer jacket of the Drying pipe track grooves are provided, in which the Intervene bearing rollers.
  • the drying agent is advantageous over a rigid and Pipe socket arranged coaxially to the axis of rotation of the drying tube fed to one end of the drying tube and / or dissipated.
  • the most closed system possible achieved that the end of the drying tube with each a cover surrounding the pipe socket is closed whose peripheral area is preferably a segment of a circle Opening is arranged that the pipe socket with a rigid, Provide faceplate running parallel to the cover which corresponds to the opening in the lid Area, leaving the aperture in the course of a Rotation of the drying tube the opening in the lid for the Temporarily releases the supply or for the removal of capsules.
  • This opening is preferably on the end or matched to the start of the screw conveyor.
  • the capsules are beneficial passed through several similar drying pipes, that are connected in series.
  • the drying agent can pass through the pipes in a closed system be performed.
  • a particularly space-saving arrangement results if there are several drying tubes of the same type on a rack are arranged at different levels and if the outlet side for the passage of the capsules a higher drying tube with the inlet side of a deeper drying pipe is connected.
  • With drying pipes of more than 2 m in length and more than 0.3 m in inner diameter good results were achieved.
  • the drying pipes were 4 m long and one Inner pipe diameter of 0.48 m.
  • the screw conveyor ordered over 34 aisles with a gradient of approx. 12 cm.
  • the material web the screw conveyor had a wall thickness of 2 mm. Baffles can still occur between the screw turns be arranged for the mixing of the capsules.
  • the described method and the described device are also particularly suitable for drying spherical Capsules because every single capsule in the drying tube covered a relatively long taxiway.
  • the spherical shape will so that with increasing drying it will be maintained even any existing deviations in the plastic Condition even balanced afterwards.
  • the drying tube 1a is about a horizontal longitudinal axis rotatably driven.
  • the drying tube is 1b parallel to the drying tube 1a, but a little lower, its longitudinal axis being inclined by approximately 5 degrees to the horizontal is.
  • the tubes could also both be horizontal be stored.
  • Both drying pipes are on storage rolls 8, which are each arranged in pairs.
  • the inlet side for the drying tube 1a is not visible in FIG. 1, however its outlet side 3 lies directly above the inlet side 2 of the lower drying tube 1b.
  • the capsules move in the direction of arrow a, making the transition into the lower drying tube 1b via a fixed connecting line 16 takes place. This protrudes into a conical one Inlet nozzle 22, which is arranged at the pipe end. Of the Inlet side 2 of the lower drying tube 1b Capsules against the inclination to the outlet side, not shown promoted.
  • each drying tube there is a screw conveyor on the inner wall 5 arranged, the worm gear having an inner diameter Si has.
  • the jacket of each drying tube has preferably at least two openings 6, as in FIG. 6 shown.
  • the lid 7 for this opening is under the curved the same radius as the pipe jacket.
  • the lid will advantageously fastened to the pipe jacket with quick-release means.
  • the screw conveyor 5 is also over guided the area of the opening 6, but not there with the Cover 7 connected.
  • the supply of gaseous drying agent 4 takes place in the Embodiment through a pipe socket 9, which has a certain distance protrudes into the drying tube 1a and the is rigidly arranged relative to this. Obviously the inside diameter Si of the screw conveyor 5 is slight larger than the outside diameter of the connector 9. A fan 10 is used as the supply source Pipe socket 9 is connected.
  • an aperture 13 rotatably with the help of a retaining collar 17 attached.
  • A remains between the cover 11 and the cover 13 Air gap to avoid friction.
  • the aperture 13 has an opening area 14 which is in a certain 3 is congruent with the Opening 12 in the lid 11.
  • the aperture 13 has the task of Close opening 12 over most of the range of rotation.
  • the lid opening 12 is covered more and more and last completely closed. This temporary exposure of the face of the drying tube is sufficient to the between to discharge two capsules lying in a screw conveyor. On the same way, the capsules can also be intermittent exposed opening in the drying tube become. The desiccant drainage thereby made possible is negligible.
  • Figure 5 shows schematically the storage of a drying tube 1a between two bearing rollers 8, 8 ', the roller 8' over a toothed belt or flat belt 21 with a drive wheel 20 connected is.
  • the bearing rollers can be in a track groove be guided so that an inclined pipe is not can slide sideways. Since the drying tube is no more Has connection to the frame 15, it can be particularly easy be lifted out.
  • FIG. 7 shows an arrangement with several Drying pipes 1a to 1x, the side and height offset in a boom frame 15 rotatably mounted are.
  • the drying tubes are connected in series, so that in a relatively small space a relatively large one Total length for drying is achieved.
  • the capsules are fed on the inlet side 2 of the top drying tube 1a and on the outlet side 3 of the lowest drying tube Removed once.
  • the connection of the individual pipes takes place via inclined connecting lines, similar to Figure 1.
  • the drying air can also via rigid pipe sockets from one drying pipe to the next.
  • the Sealing on the end faces is also the same or similar to Figure 1. But one would also be conceivable Parallel connection of the pipes with regard to the passage the drying air.

Abstract

To dry capsules of a biopolymer, and especially a soft gelatin, the capsules are within a rotating hollow body with a gas drying medium. The capsules are carried by a mechanical conveyor system in at least one drying tube, which rotates round its longitudinal axis, to travel between the entry and exit ends of the tube. The drying medium flows with or against the direction of capsule travel through the tube. The capsules are carried through a number of drying tubes, linked together in series. The drying medium recirculates through the tubes in a closed system. An Independent claim is included for an apparatus with a rotating drying tube to carry the capsules along its inner wall from the entry (2) to the exit (3) ends. The drying medium (4) flows through the tube, along its longitudinal axis. Preferred Features: A conveyor screw (5) carries the capsules through the rotating drying tube. The rotating tube (1a) and the conveyor screw (5) are of a plastics material, with the screw welded to the inner wall of the tube. The tube mantle has at least one opening which can be closed. The drying tube lies on a number of rollers (8), where at least one is powered by a drive. The drying medium is fed in and extracted at the drying tube through a coaxial tube connection (9) at both ends. The end of the drying tube, with at least one tube connection (9), is closed by a lid (11) with a preferably circular arc segment opening at its periphery. The tube connection has a rigid diaphragm, on a parallel plane to the lid (11), which clears the peripheral opening. On a rotation of the drying tube, the diaphragm frees the opening for a capsule to be inserted and removed from the drying tube. A number of rotating drying tubes (1a) are held on a frame at different levels. The outlet end of a tube is linked to the inlet end of the drying tube underneath it. The drying tube has a length of ≥ 2 m and an inner diameter of ≥ 0.3 m, with a closed mantle. The screw conveyor (5) forms a continuous spiral screw blade through the tube, with an inner diameter which is larger than the outer diameter of the end tube connections.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Trocknen von Kapseln aus einem Biopolymer, insbesondere Weichgelatinekapseln, gemäss dem Oberbegriff der unabhängigen Ansprüche 1 bzw. 3.The invention relates to a method and an apparatus for Drying capsules made of a biopolymer, in particular Soft gelatin capsules, according to the generic term of the independent Claims 1 and 3, respectively.

Kapseln aus biopolymerem Material werden in verschiedenen Bereichen benötigt, insbesondere in der Pharmaindustrie, im Nahrungsmittelbereich usw. Die Kapseln enthalten je nach der Herstellungsmethode unmittelbar nach der Verkapselung des Inhaltsstoffes einen relativ hohen Feuchtigkeitsgehalt und müssen daher einem Trocknungsprozess unterworfen werden. Dies gilt insbesondere für das Rotary-Die Verfahren, bei dem zwei endlose Gelatinebänder im Zwickel von zwei Formwalzen zusammengeführt werden. Zwischen diesen Formwalzen erhalten die Kapseln nach dem Füllprozess ihre Aussenkontur, sind jedoch noch nicht formstabil. Die Kapseln wurden bisher in einem Tumbler vorgetrocknet, der aus einer rotierenden und perforierten Trommel besteht. Durch die perforierte Trommelwand wird temperierte (18 - 35°C) Trocknungsluft geblasen, bis die Kapselhülle den gewünschten Feuchtigkeitsgehalt aufweist. Die Endtrocknung erfolgt anschliessend in Tumblern oder ohne Eigenbewegung der Kapseln auf Trocknungsflächen oder Trocknungsbändern. Ein derartiger Trocknungsprozess ist beispielsweise in der US-A-5,200,191 beschrieben.Capsules made of biopolymer material come in different Areas needed, especially in the pharmaceutical industry, in Food area etc. The capsules contain depending on the Manufacturing method immediately after encapsulating the Ingredient has a relatively high moisture content and must therefore be subjected to a drying process. This applies particularly to the Rotary-Die method, in which two Endless gelatin strips in the gusset brought together by two form rollers become. Between these form rollers, the Capsules after the filling process are their outer contour, however not yet dimensionally stable. The capsules were previously in one Pre-dried tumbler, which consists of a rotating and perforated Drum exists. Through the perforated drum wall tempered (18 - 35 ° C) drying air is blown until the Capsule shell has the desired moisture content. The Final drying then takes place in tumblers or without Self-movement of the capsules on drying surfaces or drying belts. Such a drying process is for example in US-A-5,200,191.

Ein wesentlicher Nachteil dieser bekannten Verfahren besteht darin, dass ein kontinuierlicher Trocknungsprozess nicht möglich ist. Während die Kapselproduktion kontinuierlich bzw. in sehr kurzen Taktzeiten erfolgen kann, muss diskontinuierlich getrocknet werden, wobei der Dimension des Tumblers konstruktiv bestimmte Grenzen gesetzt sind. Ausserdem ist die Reinigung der perforierten Tumblertrommeln aufwendig und das Bewegungsverhalten der Kapseln ist beim Betrieb des Tumblers unkontrollierbar. Es ist daher eine Aufgabe der Erfindung, ein Verfahren bzw. eine Vorrichtung der eingangs genannten Art zu schaffen, um Kapseln kontinuierlich und schonend trocknen zu können. Der Trocknungsprozess soll sich dabei positiv auf das Formverhalten der Kapseln auswirken und die Vorrichtung soll leicht zu reinigen bzw. leicht auf neue Chargen umstellbar sein. Schliesslich soll mit dem vorhandenen Trocknungsmittel ein möglichst hoher Wirkungsgrad erzielt werden.A major disadvantage of these known methods is in that a continuous drying process is not is possible. While the capsule production is continuous or can be done in very short cycle times, must be discontinuous be dried, taking the dimension of the tumbler constructive limits are set. In addition, the Cleaning the perforated tumbler drums is complex and that Movement behavior of the capsules is during operation of the tumbler uncontrollable. It is therefore an object of the invention a method or an apparatus of the aforementioned Way to create capsules continuously and gently to be able to dry. The drying process should do this have a positive effect on the shape of the capsules and the The device is said to be easy to clean or easy to clean Batches can be converted. Finally, with the existing one Desiccant achieved the highest possible efficiency become.

Diese Aufgabe wird in verfahrensmässiger Hinsicht mit einem Verfahren gemäss Anspruch 1 und in vorrichtungsmässiger Hinsicht mit einer Vorrichtung gemäss Anspruch 3 gelöst. Das um seine Längsachse rotierende Trocknungsrohr fördert mit Hilfe der darin angeordneten mechanischen Fördermittel die Kapseln kontinuierlich von einer Einlasseite zu einer Auslasseite. Das Trocknungsrohr kann somit permanent mit frischen Kapseln beschickt werden. Das Trocknungsmittel, vorzugsweise temperierte, getrocknete Luft, wird im Gleichstrom oder im Gegenstrom zu den Kapseln in Längsrichtung durch das Rohr geführt. Dies gewährleistet nicht nur eine grosse Anströmfläche an den Kapseln, sondern ermöglicht auch eine geschlossene Luftführung und eine optimale Energieauswertung.From a procedural point of view, this task is performed with a Method according to claim 1 and in device Regarded solved with a device according to claim 3. The Drying tube rotating about its longitudinal axis also conveys With the help of the mechanical conveying means arranged therein Capsules continuously from an inlet side to an outlet side. The drying tube can thus be constantly fresh Capsules are loaded. The drying agent, preferably tempered, dried air, is in cocurrent or countercurrent to the capsules in the longitudinal direction through the Pipe led. This not only ensures a large inflow area on the capsules, but also allows one closed air flow and optimal energy evaluation.

Das Mittel zum Fördern ist vorteilhaft eine durchgehende Förderschnecke. Auf diese Weise wird jeweils eine bestimmte Kapselmenge zwischen zwei Gängen der Schnecke vorwärtsgeschraubt und dabei schonend in Bewegung gehalten. Anstelle der Förderschnecke könnten aber auch einzelne Förderschaufeln am Rohrinnenmantel angeordnet sein. Besonders vorteilhaft ist der Rohrmantel geschlossen, so dass die Kapseln auf einer möglichst glatten Oberfläche abrollen und das Trocknungsmittel nicht zwischen beiden Rohrenden entweichen kann. In bestimmten Anwendungsfällen könnten aber einzelne Abschnitte des Rohrmantels auch mit einer Perforation oder mit Schlitzen versehen sein.The means of funding is advantageously a continuous one Auger. In this way, one becomes specific Capsule quantity screwed forward between two flights of the screw and gently kept moving. Instead of the feed screw could also individual feed blades be arranged on the inner tube jacket. It is particularly advantageous the tube jacket closed so that the capsules on a unroll as smooth a surface as possible and the desiccant cannot escape between the two pipe ends. In Certain use cases could be individual sections of the pipe jacket also with a perforation or with slits be provided.

Eine besonders preiswerte und leichte Bauweise ergibt sich, wenn das Trocknungsrohr und vorzugsweise auch die Förderschnecke aus Kunststoffmaterial bestehen. Kunststoffrohre sind als Fertigprodukte in verschiedenen Durchmessern und Qualitäten erhältlich und lassen sich leicht bearbeiten und handhaben. So kann beispielsweise die Förderschnecke ebenfalls durch einen Materialsteg aus Kunststoffmaterial gebildet sein, der an die Innenwand des Trocknungsrohrs geschweisst wird.A particularly inexpensive and lightweight construction results, if the drying tube and preferably also the screw conveyor consist of plastic material. Plastic pipes are as finished products in different diameters and Qualities available and can be easily edited and handle. For example, the screw conveyor can also formed by a web of plastic material be welded to the inside wall of the drying tube becomes.

Der Rohrmantel des Trocknungsrohrs kann wenigstens eine verschliessbare Öffnung aufweisen, über welche die Innenseite für Reinigungszwecke gut zugänglich ist. Wenn der Deckel dieser Öffnung aus transparentem Material besteht, lässt sich ausserdem noch der Materialfluss im Betrieb beobachten.The tube jacket of the drying tube can be at least one have closable opening through which the inside is easily accessible for cleaning purposes. If the lid this opening is made of transparent material also observe the material flow in the company.

Das Trocknungsrohr kann auf einem aus mehreren Lagerrollen bestehenden Lagerbock aufliegen, von denen wenigstens eine mit einer Antriebsvorrichtung verbunden ist. Das Rohr ist somit lose gelagert und kann jederzeit herausgehoben werden. Zur Erhöhung der Seitenstabilität können am Aussenmantel des Trocknungsrohrs Spurrillen vorgesehen sein, in welche die Lagerrollen eingreifen.The drying tube can be on one of several storage rolls existing bearing block, of which at least one is connected to a drive device. The pipe is thus stored loosely and can be lifted out at any time. To increase the lateral stability, the outer jacket of the Drying pipe track grooves are provided, in which the Intervene bearing rollers.

Das Trocknungsmittel wird vorteilhaft über einen starren und koaxial zur Drehachse des Trocknungsrohrs angeordneten Rohrstutzen an einem Ende des Trocknungsrohrs zugeführt und/oder abgeführt. Ein möglichst geschlossenes System wird dabei dadurch erreicht, dass das Ende des Trocknungsrohrs mit je einem den Rohrstutzen umfassenden Deckel verschlossen ist, an dessen Umfangsbereich eine vorzugsweise kreissegmentartige Öffnung angeordnet ist, dass der Rohrstutzen mit einer starren, planparallel zum Deckel verlaufenden Blende versehen ist, welche einen mit der Öffnung im Deckel korrespondierenden Bereich freilässt, wobei die Blende im Verlaufe einer Umdrehung des Trocknungsrohrs die Öffnung im Deckel für die Zufuhr bzw. für die Abfuhr von Kapseln vorrübergehend freigibt. Diese Öffnung ist dabei vorzugsweise auf das Ende bzw. auf den Anfang der Förderschnecke abgestimmt.The drying agent is advantageous over a rigid and Pipe socket arranged coaxially to the axis of rotation of the drying tube fed to one end of the drying tube and / or dissipated. The most closed system possible achieved that the end of the drying tube with each a cover surrounding the pipe socket is closed whose peripheral area is preferably a segment of a circle Opening is arranged that the pipe socket with a rigid, Provide faceplate running parallel to the cover which corresponds to the opening in the lid Area, leaving the aperture in the course of a Rotation of the drying tube the opening in the lid for the Temporarily releases the supply or for the removal of capsules. This opening is preferably on the end or matched to the start of the screw conveyor.

Da die maximal mögliche Länge eines Trocknungsrohrs aus verschiedenen Gründen begrenzt ist, werden die Kapseln vorteilhaft durch mehrere gleichartige Trocknungsrohre geführt, die in Serie miteinander verbunden sind. Das Trocknungsmittel kann dabei in einem geschlossenen System durch die Rohre geführt werden. Eine besonders platzsparende Anordnung ergibt sich, wenn auf einem Gestell mehrere gleichartige Trocknungsrohre auf verschiedenen Niveaus angeordnet sind, und wenn jeweils für die Durchleitung der Kapseln die Auslasseite eines höheren Trocknungsrohrs mit der Einlasseite eines tieferen Trocknungsrohrs verbunden ist. Mit Trocknungsrohren von mehr als 2 m Länge und mehr als 0.3 m Innendurchmesser wurden gute Resultate erzielt. In einer Versuchsanordnung hatten die Trocknungsrohre eine Länge von 4 m und einen Rohrinnendurchmesser von 0.48 m. Die Förderschnecke verfügte über 34 Umgänge mit einer Steigung von ca. 12 cm. Der Materialsteg der Förderschnecke hatte eine Wandstärke von 2 mm. Zwischen den Schneckenwindungen können jeweils noch Schikanen für die Durchmischung der Kapseln angeordnet sein.Because the maximum possible length of a drying tube For various reasons, the capsules are beneficial passed through several similar drying pipes, that are connected in series. The drying agent can pass through the pipes in a closed system be performed. A particularly space-saving arrangement results if there are several drying tubes of the same type on a rack are arranged at different levels and if the outlet side for the passage of the capsules a higher drying tube with the inlet side of a deeper drying pipe is connected. With drying pipes of more than 2 m in length and more than 0.3 m in inner diameter good results were achieved. In an experimental setup the drying pipes were 4 m long and one Inner pipe diameter of 0.48 m. The screw conveyor ordered over 34 aisles with a gradient of approx. 12 cm. The material web the screw conveyor had a wall thickness of 2 mm. Baffles can still occur between the screw turns be arranged for the mixing of the capsules.

Das beschriebene Verfahren und die beschriebene Vorrichtung eignen sich besonders auch für die Trocknung von kugelförmigen Kapseln, weil jede einzelne Kapsel im Trocknungsrohr einen relativ langen Rollweg zurücklegt. Die Kugelform wird damit mit zunehmender Trocknung beibehalten und es werden sogar allenfalls bestehende Abweichungen im plastischen Zustand nachträglich noch ausgeglichen.The described method and the described device are also particularly suitable for drying spherical Capsules because every single capsule in the drying tube covered a relatively long taxiway. The spherical shape will so that with increasing drying it will be maintained even any existing deviations in the plastic Condition even balanced afterwards.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden nachstehend genauer beschrieben. Es zeigen:

Figur 1
eine Seitenansicht auf eine Anordnung bestehend aus zwei miteinander verbundenen Trocknungsrohren,
Figur 2
ein Detail der Einspeisung für das Trocknungsmittel gemäss Figur 1,
Figur 3
eine Ansicht aus Pfeilrichtung A gemäss Figur 2,
Figur 4
die Ansicht gemäss Figur 3 nach einer Rohrdrehung von 30 Grad,
Figur 5
eine schematische Darstellung einer Lagerung eines Trocknungsrohrs,
Figur 6
die perspektivische Darstellung einer Reinigungsöffnung in einem Trocknungsrohr, und
Figur 7
die perspektivische Darstellung einer Anordnung mit mehreren versetzt übereinander angeordneten Trocknungsrohren.
Embodiments of the invention are shown in the drawings and are described in more detail below. Show it:
Figure 1
a side view of an arrangement consisting of two interconnected drying tubes,
Figure 2
2 shows a detail of the feed for the drying agent according to FIG. 1,
Figure 3
2 shows a view from arrow direction A according to FIG.
Figure 4
3 after a tube rotation of 30 degrees,
Figure 5
a schematic representation of a storage of a drying tube,
Figure 6
the perspective view of a cleaning opening in a drying tube, and
Figure 7
the perspective view of an arrangement with a plurality of staggered drying tubes.

Wie in Figur 1 dargestellt, besteht eine Anordnung zum Trocknen von Kapseln aus den beiden separaten Trocknungsrohren 1a und 1b. Das Trocknungsrohr 1a ist um eine horizontale Längsachse drehantreibbar gelagert. Das Trocknungsrohr 1b ist parallel zum Trocknungsrohr 1a, jedoch etwas tiefer gelagert, wobei seine Längsachse um ca. 5 Grad zur Horizontalen geneigt ist. Bei dieser Anordnung wird eine niedrige Befüllhöhe und eine relativ erhöhte Entleerhöhe erzielt, was die Handhabung erleichtert. Die Rohre könnten aber auch beide horizontal gelagert sein. Beide Trocknungsrohre liegen auf Lagerrollen 8, die jeweils paarweise angeordnet sind. Die Einlasseite für das Trocknungsrohr 1a ist in Figur 1 nicht sichtbar, dagegen liegt dessen Auslasseite 3 unmittelbar über der Einlasseite 2 des unteren Trocknungsrohrs 1b.As shown in Figure 1, there is an arrangement for drying of capsules from the two separate drying tubes 1a and 1b. The drying tube 1a is about a horizontal longitudinal axis rotatably driven. The drying tube is 1b parallel to the drying tube 1a, but a little lower, its longitudinal axis being inclined by approximately 5 degrees to the horizontal is. With this arrangement, a low filling level and achieved a relatively increased emptying height, which makes handling facilitated. The tubes could also both be horizontal be stored. Both drying pipes are on storage rolls 8, which are each arranged in pairs. The inlet side for the drying tube 1a is not visible in FIG. 1, however its outlet side 3 lies directly above the inlet side 2 of the lower drying tube 1b.

Die Kapseln bewegen sich in Pfeilrichtung a, wobei der Übergang in das untere Trocknungsrohr 1b über eine feste Verbindungsleitung 16 erfolgt. Diese ragt in einen konischen Einlassstutzen 22, der am Rohrende angeordnet ist. Von der Einlasseite 2 des unteren Trocknungsrohrs 1b werden die Kapseln gegen die Neigung zur nicht dargestellten Auslasseite gefördert.The capsules move in the direction of arrow a, making the transition into the lower drying tube 1b via a fixed connecting line 16 takes place. This protrudes into a conical one Inlet nozzle 22, which is arranged at the pipe end. Of the Inlet side 2 of the lower drying tube 1b Capsules against the inclination to the outlet side, not shown promoted.

In jedem Trocknungsrohr ist an der Innenwand eine Förderschnecke 5 angeordnet, wobei deren Schneckengang einen Innendurchmesser Si aufweist. Der Mantel jedes Trocknungsrohrs hat vorzugsweise wenigstens zwei Öffnungen 6, wie in Figur 6 dargestellt. Der Deckel 7 für diese Öffnung ist unter dem gleichen Radius gekrümmt wie der Rohrmantel. Der Deckel wird vorteilhaft mit Schnellverschlussmitteln am Rohrmantel befestigt. Selbstverständlich ist die Förderschnecke 5 auch über den Bereich der Öffnung 6 geführt, dort jedoch nicht mit dem Deckel 7 verbunden.In each drying tube there is a screw conveyor on the inner wall 5 arranged, the worm gear having an inner diameter Si has. The jacket of each drying tube has preferably at least two openings 6, as in FIG. 6 shown. The lid 7 for this opening is under the curved the same radius as the pipe jacket. The lid will advantageously fastened to the pipe jacket with quick-release means. Of course, the screw conveyor 5 is also over guided the area of the opening 6, but not there with the Cover 7 connected.

Die Zufuhr von gasförmigem Trocknungsmittel 4 erfolgt im Ausführungsbeispiel durch einen Rohrstutzen 9, der über eine bestimmte Strecke in das Trocknungsrohr 1a hineinragt und der relativ zu diesem starr angeordnet ist. Ersichtlicherweise ist dabei der Innendurchmesser Si der Förderschnecke 5 geringfügig grösser als der Aussendurchmesser des Stutzens 9. Als Versorgungsquelle dient ein Ventilator 10, der an den Rohrstutzen 9 angeschlossen ist.The supply of gaseous drying agent 4 takes place in the Embodiment through a pipe socket 9, which has a certain distance protrudes into the drying tube 1a and the is rigidly arranged relative to this. Obviously the inside diameter Si of the screw conveyor 5 is slight larger than the outside diameter of the connector 9. A fan 10 is used as the supply source Pipe socket 9 is connected.

Die Abschlusspartie eines Trocknungsrohrs und deren Funktion wird anschliessend anhand der Figuren 2 bis 4 erläutert. Das Rohrende ist dabei mit einem topfartigen Deckel 11 verschlossen, der seitlich mit Schrauben 19 mit dem Rohrmantel verbunden ist. Der Deckel schliesst sich mit einem Dichtungskragen 18 um den starren Rohrstutzen 9. An seinem Umfangsbereich hat der Deckel 11 eine kreissegmentartige Öffnung 12.The end of a drying tube and its function is then explained with reference to Figures 2 to 4. The The tube end is closed with a pot-like cover 11, which is connected laterally with screws 19 to the pipe jacket is. The lid closes with a sealing collar 18 around the rigid pipe socket 9. At its peripheral area the lid 11 has a circular segment-like opening 12.

Auf der Deckelinnenseite ist auf dem starren Rohrstutzen 9 eine Blende 13 mit Hilfe eines Haltekragens 17 drehfest befestigt. Zwischen Deckel 11 und Blende 13 verbleibt ein Luftspalt zur Vermeidung von Reibung. Auch die Blende 13 verfügt über einen Öffnungsbereich 14, der in einer bestimmten Relativlage gemäss Figur 3 deckungsgleich ist mit der Öffnung 12 im Deckel 11. Die Blende 13 hat die Aufgabe, die Öffnung 12 über den grössten Teil des Drehbereichs zu verschliessen.On the inside of the lid is on the rigid pipe socket 9 an aperture 13 rotatably with the help of a retaining collar 17 attached. A remains between the cover 11 and the cover 13 Air gap to avoid friction. The aperture 13 has an opening area 14 which is in a certain 3 is congruent with the Opening 12 in the lid 11. The aperture 13 has the task of Close opening 12 over most of the range of rotation.

Wenn sich das Trocknungsrohr ausgehend von der grösstmöglichen Blendenöffnung gemäss Figur 3 in Pfeilrichtung b dreht, wird die Deckelöffnung 12 immer mehr abgedeckt und zuletzt ganz verschlossen. Diese vorübergehende Freilegung der Stirnseite des Trocknungsrohrs genügt, um jeweils die zwischen zwei Schneckengängen liegenden Kapseln auszutragen. Auf die gleiche Weise können die Kapseln auch durch eine intermittierend freigelegte Öffnung in das Trocknungsrohr eingeführt werden. Die dabei ermöglichte Abströmung von Trocknungsmittel ist vernachlässigbar.If the drying tube starts from the largest possible 3 turns in the direction of arrow b, the lid opening 12 is covered more and more and last completely closed. This temporary exposure of the face of the drying tube is sufficient to the between to discharge two capsules lying in a screw conveyor. On the same way, the capsules can also be intermittent exposed opening in the drying tube become. The desiccant drainage thereby made possible is negligible.

Figur 5 zeigt schematisch die Lagerung eines Trocknungsrohrs 1a zwischen zwei Lagerrollen 8, 8', wobei die Rolle 8' über einen Zahnriemen oder Flachriemen 21 mit einem Antriebsrad 20 verbunden ist. Die Lagerrollen können in einer Spurrille geführt sein, so dass auch ein schräg gestelltes Rohr nicht seitlich abrutschen kann. Da das Trocknungsrohr keine weitere Verbindung zum Gestell 15 aufweist, kann es besonders leicht herausgehoben werden.Figure 5 shows schematically the storage of a drying tube 1a between two bearing rollers 8, 8 ', the roller 8' over a toothed belt or flat belt 21 with a drive wheel 20 connected is. The bearing rollers can be in a track groove be guided so that an inclined pipe is not can slide sideways. Since the drying tube is no more Has connection to the frame 15, it can be particularly easy be lifted out.

Figur 7 zeigt schliesslich noch eine Anordnung mit mehreren Trocknungsrohren 1a bis 1x, die seitlich und höhenmässig versetzt in einem Auslegergestell 15 drehantreibbar gelagert sind. Die Trocknungsrohre sind in Serie miteinander verbunden, so dass auf relativ kleinem Raum eine relativ grosse Gesamtlänge zur Trocknung erzielt wird. Die Kapseln werden auf der Einlasseite 2 des obersten Trocknungsrohrs 1a zugeführt und an der Auslasseite 3 des untersten Trocknungsrohrs 1x wieder entnommen. Die Verbindung der einzelnen Rohre erfolgt über schräge Verbindungsleitungen, ähnlich wie bei Figur 1. Auch die Trocknungsluft kann über starre Rohrstutzen von einem zum nächsten Trocknungsrohr geführt werden. Die Abdichtung an den Stirnseiten erfolgt dabei ebenfalls gleich oder ähnlich wie bei Figur 1. Denkbar wäre aber auch eine Parallelschaltung der Rohre im Hinblick auf die Durchleitung der Trocknungsluft.Finally, FIG. 7 shows an arrangement with several Drying pipes 1a to 1x, the side and height offset in a boom frame 15 rotatably mounted are. The drying tubes are connected in series, so that in a relatively small space a relatively large one Total length for drying is achieved. The capsules are fed on the inlet side 2 of the top drying tube 1a and on the outlet side 3 of the lowest drying tube Removed once. The connection of the individual pipes takes place via inclined connecting lines, similar to Figure 1. The drying air can also via rigid pipe sockets from one drying pipe to the next. The Sealing on the end faces is also the same or similar to Figure 1. But one would also be conceivable Parallel connection of the pipes with regard to the passage the drying air.

Claims (13)

Verfahren zum Trocknen von Kapseln aus einem Biopolymer, insbesondere Weichgelatinekapseln, bei dem die Kapseln in einem rotierenden Hohlkörper mit einem gasförmigen Trocknungsmittel beaufschlagt werden, dadurch gekennzeichnet, dass die Kapseln durch mechanische Fördermittel in wenigstens einem um seine Längsachse rotierenden Trocknungsrohr von einer Einlasseite zu einer Auslasseite gefördert werden und dass das Trocknungsmittel im Gleichstrom oder im Gegenstrom zu den Kapseln in Längsrichtung durch das Rohr geführt wird.Process for drying capsules from a biopolymer, especially soft gelatin capsules, in which the capsules in a rotating hollow body with a gaseous one Desiccant are applied, characterized in that that the capsules by mechanical means in at least one rotating around its longitudinal axis Drying pipe from an inlet side to an outlet side are promoted and that the desiccant in the Co-current or counter-current to the capsules in the longitudinal direction is passed through the pipe. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Kapseln durch mehrere rotierende Trocknungsrohre geführt werden, die in Serie miteinander verbunden sind, und dass das Trocknungsmittel in einem geschlossenen System durch die Rohre geführt wird.A method according to claim 1, characterized in that the capsules through several rotating drying tubes that are connected in series, and that the drying agent in a closed System through the pipes. Vorrichtung zum Trocknen von Kapseln aus einem Biopolymer, insbesondere Weichgelatinekapseln, mit einem drehbaren Hohlkörper zur Aufnahme der Kapseln und mit einer Versorgungsquelle für die Zufuhr eines gasförmigen Trocknungsmittels in den Hohlkörper, dadurch gekennzeichnet, dass der Hohlkörper ein um seine Längsachse drehantreibbar gelagertes Trocknungsrohr ist, an dessen Innenwand Mittel zum Fördern der Kapseln von einer Einlasseite (2) zu einer Auslasseite (3) angeordnet sind, und dass das Trocknungsmittel (4) in Längsrichtung durch das Trocknungsrohr durchleitbar ist.Device for drying capsules made of a biopolymer, especially soft gelatin capsules, with a rotatable Hollow body to hold the capsules and with a Supply source for the supply of a gaseous Desiccant in the hollow body, characterized in that the hollow body is about its longitudinal axis is rotatably driven drying tube, at the Inner wall means for conveying the capsules from an inlet side (2) are arranged on an outlet side (3), and that the drying agent (4) in the longitudinal direction the drying tube can be passed through. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Mittel zum Fördern der Kapseln eine Förderschnecke (5) ist.Device according to claim 3, characterized in that the means of conveying the capsules is a screw conveyor (5) is. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Trocknungsrohr (1a) und die Förderschnecke (5) aus Kunststoffmaterial bestehen und dass die Förderschnecke mit der Innenwand des Rohrmantels verschweisst ist.Device according to claim 4, characterized in that the drying tube (1a) and the screw conveyor (5) are made of plastic material and that the screw conveyor welded to the inner wall of the pipe jacket is. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass der Rohrmantel wenigstens eine verschliessbare Öffnung (6) aufweist.Device according to one of claims 3 to 5, characterized characterized in that the tubular jacket at least one closable opening (6). Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das Trocknungsrohr auf mehreren Lagerrollen (8) aufliegt, von denen wenigstens eine mit einer Antriebsvorrichtung verbunden ist.Device according to one of claims 3 to 6, characterized characterized that the drying tube on several Bearing rollers (8) rests, of which at least one with a drive device is connected. Vorrichtung nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass das Trocknungsmittel über einen starren und koaxial zur Drehachse des Trocknungsrohrs angeordneten Rohrstutzen an einem Ende des Trocknungsrohrs zuführbar und/oder abführbar ist.Device according to one of claims 3 to 7, characterized characterized in that the drying agent has a rigid and coaxial to the axis of rotation of the drying tube arranged pipe socket at one end of the drying tube can be supplied and / or removed. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das Ende des Trocknungsrohrs mit einem den Rohrstutzen (9) umfassenden Deckel (11) verschlossen ist, an dessen Umfangsbereich eine vorzugsweise kreissegmentartige Öffnung (12) angeordnet ist, dass der Rohrstutzen mit einer starren, planparallel zum Deckel (11) verlaufenden Blende (13) versehen ist, welche einen mit der Öffnung (12) im Deckel korrespondierenden Bereich (14) freilässt, wobei die Blende (13) im Verlaufe einer Umdrehung des Trocknungsrohrs die Öffnung (12) im Deckel (11) für die Zufuhr bzw. Abfuhr von Kapseln vorrübergehend freigibt.Device according to claim 8, characterized in that the end of the drying pipe with a the pipe socket (9) comprehensive lid (11) is closed whose peripheral area is preferably a segment of a circle Opening (12) is arranged that the pipe socket with a rigid, parallel to the cover (11) Aperture (13) is provided, which one with the Opening (12) in the area corresponding to the lid (14) leaves the aperture (13) in the course of one revolution of the drying tube, the opening (12) in the lid (11) temporarily for the supply or removal of capsules releases. Vorrichtung nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, dass auf einem Gestell (15) mehrere gleichartige Trocknungsrohre (1a, 1b) auf verschiedenen Niveaus angeordnet sind und dass jeweils für die Durchleitung der Kapseln die Auslasseite eines höheren Trocknungsrohrs mit der Einlasseite eines tieferen Trocknungsrohrs verbunden ist.Device according to one of claims 3 to 9, characterized characterized in that several on a frame (15) similar drying tubes (1a, 1b) on different Levels are arranged and that each for the passage the capsules are the outlet side of a higher drying tube with the inlet side of a deeper drying tube connected is. Vorrichtung nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, dass das Trocknungsrohr eine Länge von mehr als 2 m und einen Rohrinnendurchmesser von mehr als 0.3 m aufweist.Device according to one of claims 3 to 10, characterized characterized that the drying tube is a length of more than 2 m and a pipe inside diameter of more than 0.3 m. Vorrichtung nach Anspruch 4 und Anspruch 8, dadurch gekennzeichnet, dass die Förderschnecke (5) einen durch einen Materialsteg gebildeten, durchgehenden Schneckenflügel aufweist, dessen Innendurchmesser grösser ist als der Aussendurchmesser des Rohrstutzens.Apparatus according to claim 4 and claim 8, characterized characterized in that the screw conveyor (5) through a continuous web of snails formed by a material web has, whose inner diameter is larger than the outside diameter of the pipe socket. Vorrichtung nach einem der Ansprüche 3 bis 12, dadurch gekennzeichnet, dass der Mantel des Trocknungsrohrs geschlossen ausgebildet ist.Device according to one of claims 3 to 12, characterized characterized that the jacket of the drying tube is closed.
EP19980810085 1998-02-05 1998-02-05 Process and apparatus for drying soft biopolymer capsules, in particular soft gelatin capsules Expired - Lifetime EP0935111B1 (en)

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EP19980810085 EP0935111B1 (en) 1998-02-05 1998-02-05 Process and apparatus for drying soft biopolymer capsules, in particular soft gelatin capsules
DE59808446T DE59808446D1 (en) 1998-02-05 1998-02-05 Method and device for drying soft capsules made of a biopolymer, in particular soft gelatin capsules

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CN104990379A (en) * 2015-06-20 2015-10-21 浙江天龙胶丸有限公司 Infrared capsule dryer
CN105352293A (en) * 2015-11-17 2016-02-24 新昌县城南乡通辉机械厂 Rotating type efficient capsule drying device
CN107202481A (en) * 2017-06-07 2017-09-26 新昌县通辉机械有限公司 Capsule is persistently fed drying unit
CN108662865A (en) * 2018-06-19 2018-10-16 浙江富昌机械有限公司 Full intelligence soft capsule drying rotating cage system
CN112856940A (en) * 2021-01-08 2021-05-28 龚义红 Moisture-free rapid treatment device for capsule bagging pretreatment
CN113251762A (en) * 2021-06-16 2021-08-13 华润三九（南昌）药业有限公司 Dry rotating cage of intelligence is used in capsule production convenient to sample

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Publication number Priority date Publication date Assignee Title
CN104990379A (en) * 2015-06-20 2015-10-21 浙江天龙胶丸有限公司 Infrared capsule dryer
CN105352293A (en) * 2015-11-17 2016-02-24 新昌县城南乡通辉机械厂 Rotating type efficient capsule drying device
CN105352293B (en) * 2015-11-17 2018-04-10 新昌县城南乡通辉机械厂 A kind of rotary type efficient capsule drying device
CN107202481A (en) * 2017-06-07 2017-09-26 新昌县通辉机械有限公司 Capsule is persistently fed drying unit
CN108662865A (en) * 2018-06-19 2018-10-16 浙江富昌机械有限公司 Full intelligence soft capsule drying rotating cage system
CN112856940A (en) * 2021-01-08 2021-05-28 龚义红 Moisture-free rapid treatment device for capsule bagging pretreatment
CN113251762A (en) * 2021-06-16 2021-08-13 华润三九（南昌）药业有限公司 Dry rotating cage of intelligence is used in capsule production convenient to sample

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