EP0138894A1 - Procede et dispositif pour realiser un enrobage a plusieurs couches sur des granules tels que des noyaux de dragees - Google Patents

Procede et dispositif pour realiser un enrobage a plusieurs couches sur des granules tels que des noyaux de dragees

Info

Publication number
EP0138894A1
EP0138894A1 EP19840901193 EP84901193A EP0138894A1 EP 0138894 A1 EP0138894 A1 EP 0138894A1 EP 19840901193 EP19840901193 EP 19840901193 EP 84901193 A EP84901193 A EP 84901193A EP 0138894 A1 EP0138894 A1 EP 0138894A1
Authority
EP
European Patent Office
Prior art keywords
air
coating
drying
flow
drying air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19840901193
Other languages
German (de)
English (en)
Inventor
Rudolf Dunajtschik
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.)
Driam Metallprodukt GmbH and Co KG
Original Assignee
Driam Metallprodukt GmbH and Co KG
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 Driam Metallprodukt GmbH and Co KG filed Critical Driam Metallprodukt GmbH and Co KG
Publication of EP0138894A1 publication Critical patent/EP0138894A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
    • A23G3/02—Apparatus specially adapted for manufacture or treatment of sweetmeats or confectionery; Accessories therefor
    • A23G3/20—Apparatus for coating or filling sweetmeats or confectionery
    • A23G3/26—Apparatus for coating by tumbling with a liquid or powder, spraying device-associated, drum, rotating pan

Definitions

  • the invention relates to a method for applying a multilayer coating on granules such as dragee cores, the individual coating layers being applied one above the other in such a way that the coating composition for a coating layer is successively applied to the granulate bed held on a movable, air-permeable treatment pad, distributed on the surface of the granules and is dried, whereupon the covering is largely dried out and finally its outer surface is hardened, smoothed and polished, and in particular drying air flows continuously through the granulate bed during the treatment.
  • a rotatable drum is generally used as treatment pads, the granulate bed being inclined according to the direction of rotation and then the drying air being directed so that it flows through this bed to some extent evenly. While in most known processes the drying air enters the bed at the top (direct current to the spraying flow), in other processes the drying air flows up through the granulate bed led and drawn off there (counter current). As far as the air is only sucked in, the pressure differences acting on the granules are relatively small, and the drying effect is correspondingly low. Therefore, work can only be carried out economically if the drying air is also supplied to the drying chamber in the order of magnitude of 200 to 400 mm / WS.
  • the drying air is preferably introduced into the granulate bed from below.
  • the contact forces are significantly reduced, which results in a reduction in abrasion and improves the uniformity of the casing as well as its degree of drying out and overall its quality.
  • the smoothness, density and gloss of the last applied layers fell somewhat compared to the coated tablets treated with the Gieichstrom method.
  • the invention is based on the coating method specified at the outset and pursues the task of coating the granules in such a way that the inner layers are subjected to as little stress as possible and uniformly and can therefore be dried out relatively densely, while the outer layers applied to the already dry and relatively dense inner layers are hardened, compacted and smoothed to a much greater extent.
  • the drying air is guided from the treatment bed through the granulate bed upwards (counterflow), at least during the polishing process, but at least during the polishing process from above through the granule bed to the bed (direct current).
  • the flow direction is briefly switched to direct current from a certain shell state after drying of one or more layers. A few seconds are all it takes to pull off the semolina previously formed from the coating compound.
  • the invention is of particular importance for coated tablets whose coating has an inner temperature-sensitive soft blanket which, according to the invention, is dried with the drying air introduced from below through the treatment layer at an operating temperature below the softening temperature and is thereby solidified for further treatment.
  • the batch is removed from the coating drum at least after application of the soft blanket and for several hours in the Room left.
  • the layer height when drying out may only be 4 cm to 5 cm. All of this is very costly and time-consuming and primarily affects confectionery production, since the pharmaceutical industry works with faster and more hardening e-coating materials, which result in a more resistant casing more quickly. According to the invention, however, it is readily possible to quickly dry out soft blankets without reloading processes so that the outer blanket can then be applied immediately.
  • the entire bed of granules is therefore primarily left lying on the drying pad in a relatively large layer height and relatively cold air flowing through it.
  • the drying temperature is then increased further.
  • the drying pad is only slightly moved periodically during the drying process, with the granules always being rearranged somewhat in order to further improve the uniformity.
  • the drum When using a rotatable coating drum as a treatment pad, which in particular has circumferentially distributed guide means with passages for drying air, the drum is expediently periodically advanced with small switching steps during the drying processes for the individual blankets.
  • the duration of the recording period like the air temperature, is then adapted to the type of casing material used, as well as its hardness and drying condition.
  • the invention further relates to a coating device for applying a coating to granules such as dragee cores, with a rotatable coating drum, which on its circumference has mchererc staggered guide devices with passages for drying air, which are connected to a central flow distributor, in such a way that the drying air irrespective of the instantaneous rotational position of the coating drum, at least during the application processes, the granulate bed always flows through from below and is derived above the granulate bed, which device for practicing the above-described method is characterized according to the invention by switching means to be activated at least before the polishing process for switching the flow path of the drying air a flow through the granulate bed directed against the support drum wall from top to bottom.
  • this switchover can, of course, be carried out manually, but it should be possible, if possible, to be carried out automatically in the course of the process.
  • the flow distributor can be designed such that at least the air passages provided in the region of the granulate bed are connected to a common sub-air ring segment and air passages located above the granulate bed are connected to an upper air ring segment opposite the sub-air ring segment.
  • 1 is a schematic representation of a coating device with flow diagram in a first switching position
  • FIG. 3 shows a modification of the switching device
  • Fig. 4 shows a side view of a distributor housing with a further developed switching device
  • Fig. 5 shows a section through this device along the line V / V in Fig. 4th
  • a coating device 1 is essentially formed by a coating drum 2 with a flow distributor 3, which is connected to a suction and pressure blower 5 via a switching device 4.
  • the drum 2 is designed as a twelve-sided prism with connection channels 6, which are provided on the outside of each prism surface and are connected to the interior 8 thereof via openings 7 in the drum wall.
  • the coating drum rotates in the direction of the arrow 9 and, when a batch of granules is introduced, forms a granulate bed 11 with a more or less irregular surface 12 that is inclined in accordance with the direction of rotation.
  • the flow distributor 3 is usually on one. End of the drum with the connecting channels 6 in connection. Only for the sake of clarity it is attached here to the outer circumference of the drum, which here forms a cylindrical wall 13 which is interrupted in the region of the connecting channels 6, so that these channels are open to the outside.
  • the flow distributor 3 is formed here by a lower segment groove 14, an upper segment groove 15 and segment diaphragms 16, 17 attached between them, which are sealingly connected together and are closed centrally around the drum axis around the cylindrical drum wall 13, but are prevented from being carried along by the rotatable drum wall 13 .
  • Both segment channels 14, 15 are connected via lines 18, 19 to the switching device 4, which is designed here as a four-way rotary valve for the sake of simplicity. While the connections 41, 42 of the rotary valve are connected to the lines 18, 19, the likewise opposite connections 42 and 44 are connected to the supply air line 21 and the suction line 22 of the suction-pressure blower 5.
  • the lower segment channel 14 is used as a supply air channel and is connected to the granulate bed 11 via four connecting channels 6 through the openings in the drum jacket forming a treatment layer.
  • Segmeivtrinne 15 which extends over a larger circumferential angle, is connected by six connecting channels 6 to the interior space of the drum above the granulate bed, so that drying air supplied via line 18 passes through according to arrows 23 from the lower part of the drum wall forming the treatment position the granulate bed 11 can climb through and get out of the inner space 8 into the segment channel 15, from which they are guided back to the suction fan 5 via line 19, connections 43, 44 and suction line 22.
  • the connections 42, 43 are connected to one another according to FIG initiated.
  • the air then flows according to the arrows 231 from above through the granulate bed to the segment channel 14 and arrives via line 18, connections 41, 44 and line 22 again to the blower 5.
  • the bearing force of the granulate bed the individual granules on each other and reinforced on the lower drum wall.
  • the surface is exposed to increased pressure, which on the one hand leads to mechanical compression, but on the other hand also leads to abrasion.
  • valves 141 to 144 are connected between the lines 118 and 119 produced by the flow distributor on the one hand and the supply air line 121 and the exhaust air line 122 on the other hand. 1, the valves 141 and 143 are open, the valves 142 and 144 are closed. Supply air and exhaust air can therefore flow essentially linearly from line 121 to line 118 and from line 119 to line 122.
  • the supply air lines 121 and 122 are first mounted in a common cuboid housing, separated from one another by a longitudinal center wall 26, closed off by an end wall 27 and, by removing part of the upper wall, form a square section divided by the partition Opening 28.
  • the lines 18 and 19 are combined and constructed in the same way and connect in a parallel plane at 90 °, the opening 281 coming down.
  • a cuboid valve block 220 with individual louvre flap valves 241 to 244 is switched on.
  • All slide and valve designs can be power-operated, preferably electropneumatic, and can therefore be switched during the process.
  • the Umschaitvoriquescn explained here are used according to the invention primarily to carry out the coating processes and the drying of the inner cover of a covering according to the switch setting Fig. 1, whereby a comparison of the covers and enveloping layers can be achieved with increased protection due to the reduction of the contact forces , while at least in the eventual polishing process, the switch is made to the switch position Fig. 1a, in order to use the pressure of the supply air in the order of magnitude of 280 to 400 mm / WS to increase the contact pressure of the granules on the drum wall and against one another. Let it this way coated tablets with a particularly soft and hard-to-harden inner layer can be processed continuously with successive work processes in the same coating drum.
  • a core batch of 1400 kg of almonds is filled into the coating drum, which is to be covered with a soft blanket of approx. 300 kg. This in turn is made up of
  • the soft blanket thus applied is formed by ten layers, so that 6 kg of syrup sugar and 24 kg of powdered sugar are added to each layer.
  • the syrup is formed by an approximately 50% concentrate, and the flow from the bottom up counteracts a backflow and crystallization of the sugar in the perforations of the penetration drum 2.
  • each layer is first lightly dried after the distribution process.
  • a hard sugar blanket of 300 kg should then be added to the batch, which now has a weight of 1700 kg be worn.
  • the application processes here were the same as when applying the soft blanket, only syrup with a sugar concentration of approx. 75% was used, and drying air at a higher temperature was used to dry out.
  • the color blanket to be finally applied should have a sugar weight of only 60 kg and should be applied in several layers with a decreasing layer weight.
  • Color syrup with a sugar concentration of 70% to 71% is again used, and the final drying is carried out at temperatures of approximately 28 ° to 30 ° C.
  • the drum normally stood still and was only switched over periodically for a short time in order to enable repositioning without pronounced rolling of the coated tablets.
  • the outer layer was so hard that it was possible to switch to the switch position shown in FIG. 1a, so that the drying air was supplied from above.
  • a polishing compound still to be applied was already added at this switch position, and the drum was operated continuously, the outer surfaces of the adjacent dragées having smoothed and polished each other.
  • the non-rotatable distributor housing 51 is formed by an upper housing half 52 and a lower housing half 53, which are flanged together in an axial plane 54.
  • the upper housing half 52 is merely designed as a U-shaped channel profile, which is provided with annular grooves 55 to 57 for receiving ring seals.
  • T-shaped separating strips 58, 59 with web 60 and sealing flange 61 attached there are two T-shaped separating strips 58, 59 with web 60 and sealing flange 61 attached. These separating strips can be integrally formed or additionally attached and made of special sealing material.
  • a supply air connector 6-4 and an exhaust air connector 65 are also formed radially, which are each individually connected to the supply air line 21 and the suction line 22, respectively.
  • a shorter, lower air segment channel 66 extending over approximately 80 ° and a longer upper air segment channel 67 are formed, which extends over an angle of approximately 250 °.
  • Each separating strip 58, 59 is also assigned a flow switch 68 or 69, which is designed here as a rotary slide valve with a shut-off segment 70 in the form of a cylinder section, each with one end at the free end of a web 60 and the other end inside at the Wall of the respective pipe socket 64 or 65 rests sealingly.
  • Both rotary valves are coupled with rope pulleys 72 via a cable pull 71 and can be pivoted by a compressed air cylinder 73 between the position of the shut-off segment 70 drawn out with solid lines and the position drawn with dash-dotted lines.
  • the piston rod 74 of the compressed air cylinder held on a bracket 77 so that it can be pivoted engages a crank 75 which is firmly seated on the slide shaft 76 and can be pivoted through 90 °.
  • supply air flows from the flow switch 68 into the lower air channel 66, and from the upper air channel 67, exhaust air flows through the flow switch 69 into the suction line 22 and to the suction pressure blower.
  • the switchover can be willingly controlled or triggered automatically according to process data, if the air flows from above onto the coated bed and is to be discharged from the lower air channel 66 from below.
  • the supply air line 21 to the flow changeover switch 68 always deals exclusively with supply air and therefore generally with filtered clean air. Any abrasion of the coated tablets can only be removed via the exhaust air line 22 with the flow direction remaining the same. It is therefore excluded that when the flow is switched over, abrasion particles deposited from an outer line are conveyed back into the drum. Contamination can also occur exclusively in the exhaust air flow path, but otherwise does not cause any change in operation.
  • valve flap 8l is mounted on each separating strip 58 and 59 and can be pivoted from there to the two walls of the pipe socket 64 or 65. With an enlargement of the outflow cross-section, this results in a smoothing of the flow and a decrease in the maximum local outflow speed, and thereby a reduction in the noise level.
  • mechanically connecting the two flow switches according to FIG. 4 they are provided there with separate motorized actuators which are only connected in terms of control.
  • a pivot pin 82 is rotatably seated in each separating strip 58, 59, which, in addition to the valve flap 81 fitted inside in the lower housing half 53, carries a switching lever 84 outside this housing half, which is moved through the piston rod 85 of a pressure medium cylinder 86 into the one with chain lines drawn position 841 can be pivoted and thereby the valve body 81 creates the other housing wall.
  • the housing wall can then remain rounded to such an extent that no excessively high speed peaks form and the flow noise remains limited.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Glanulating (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Un tambour à dragées (2) est pourvu d'un répartiteur (3) de courant qui est relié à un ventilateur (5) à travers un dispositif de commutation (4). L'air de séchage provenant d'une conduite d'amenée (21) est introduit dans une goulotte inférieure (14) par la conduite (18), de là s'écoule à travers le lit de granulés (11) vers le haut et est introduit de nouveau dans le ventilateur (5) par la goulotte supérieure (15), la conduite (19) et la conduite d'aspiration (22). Ceci peut avoir lieu, en principe à l'extérieur dans un circuit d'air complètement fermé. Peu avant l'opération de polissage de la couche d'enrobage le dispositif de commutation (4) est commuté de telle manière que l'air de séchage s'écoule maintenant depuis le haut à travers le lit de granulés vers la goulotte inférieure (14). La pression plus grande d'appui permet un meilleur compactage, durcissement et lissage des couches extérieures.
EP19840901193 1983-03-22 1984-03-13 Procede et dispositif pour realiser un enrobage a plusieurs couches sur des granules tels que des noyaux de dragees Withdrawn EP0138894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3310232 1983-03-22
DE19833310232 DE3310232A1 (de) 1983-03-22 1983-03-22 Verfahren und vorrichtung zum aufbringen einer vielschichtigen umhuellung auf granulate wie drageekerne

Publications (1)

Publication Number Publication Date
EP0138894A1 true EP0138894A1 (fr) 1985-05-02

Family

ID=6194206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840901193 Withdrawn EP0138894A1 (fr) 1983-03-22 1984-03-13 Procede et dispositif pour realiser un enrobage a plusieurs couches sur des granules tels que des noyaux de dragees

Country Status (4)

Country Link
EP (1) EP0138894A1 (fr)
JP (1) JPS60500747A (fr)
DE (1) DE3310232A1 (fr)
WO (1) WO1984003610A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07163853A (ja) * 1993-10-12 1995-06-27 Freunt Ind Co Ltd 粉粒体コーティング装置
IT1400396B1 (it) 2010-06-08 2013-05-31 Perfetti Van Melle Spa Metodo ed impianto per il rivestimento di prodotti edibili.
DE102012011286A1 (de) * 2012-06-08 2013-12-12 Glatt Maschinen- Und Apparatebau Ag Vorrichtung zum Beschichten oder Umhüllen von Partikeln
CN105055172A (zh) * 2015-08-21 2015-11-18 江苏库克机械有限公司 一种带有多进料总成的可倾倒式双锅包衣装置及工艺

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL127698C (fr) *
US2138297A (en) * 1938-02-17 1938-11-29 American Chicle Co Drying and/or coating apparatus
CH477205A (de) * 1966-12-16 1969-08-31 Ciba Geigy Dragiervorrichtung
FR2133243A5 (en) * 1971-04-14 1972-11-24 Guire Jean Drying process and centrifuge - for coating pills
US3934545A (en) * 1971-11-15 1976-01-27 Alpha Sheet Metal Works, Inc. Apparatus for enrobing discrete objects
DE2212985A1 (de) * 1972-03-17 1973-09-20 Manfred Sauter Drageemaschine
DE2445102A1 (de) * 1974-09-20 1976-04-08 Glatt Werner Dragiervorrichtung
JPS5621466Y2 (fr) * 1976-10-05 1981-05-21
DE2805801A1 (de) * 1978-02-11 1979-08-16 Driam Metallprodukt Gmbh & Co Vorrichtung zum beschichten von granulaten wie drageekerne mit einer huelle und zum antrocknen der huelle durch trocknungsluft
JPS5640151A (en) * 1979-09-06 1981-04-16 Daiichi Seiyaku Co Coating device for tablet
AU540520B2 (en) * 1979-12-03 1984-11-22 Lilly Industries Limited Tablet coating apparatus
FR2502466A1 (fr) * 1981-03-25 1982-10-01 Dumoulin Cie Ets F Turbine pour l'enrobage de dragees de produits alimentaires ou pharmaceutiques
EP0079348B1 (fr) * 1981-05-22 1987-08-05 Glatt Maschinen- und Apparatebau AG Dispositif pour recouvrir des particules, notamment des medicaments sous forme de particules telles que des tablettes
DE3131808A1 (de) * 1981-08-12 1983-02-24 Driam Metallprodukt Gmbh & Co Kg, 7991 Eriskirch Vorrichtung zum beschichten von granulaten wie drageekerne mit einer huelle und zum austrocknen dieser huelle
CH656077A5 (de) * 1982-01-29 1986-06-13 Glatt Maschinen & Apparatebau Verfahren zum ueberziehen von teilchen, insbesondere arzneimittel-teilchen, und vorrichtung zur durchfuehrung des verfahrens.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403610A1 *

Also Published As

Publication number Publication date
WO1984003610A1 (fr) 1984-09-27
DE3310232A1 (de) 1984-09-27
JPS6219134B2 (fr) 1987-04-27
JPS60500747A (ja) 1985-05-23

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Inventor name: DUNAJTSCHIK, RUDOLF