EP2081759B1 - Procédé et dispositif de moulage à cycles de rotation à haut rendement - Google Patents

Procédé et dispositif de moulage à cycles de rotation à haut rendement Download PDF

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Publication number
EP2081759B1
EP2081759B1 EP07822833.5A EP07822833A EP2081759B1 EP 2081759 B1 EP2081759 B1 EP 2081759B1 EP 07822833 A EP07822833 A EP 07822833A EP 2081759 B1 EP2081759 B1 EP 2081759B1
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EP
European Patent Office
Prior art keywords
die
displacement
grid
tool
limiting elements
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
EP07822833.5A
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German (de)
English (en)
Other versions
EP2081759A1 (fr
Inventor
Klaus Gebert
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.)
AbbVie Deutschland GmbH and Co KG
Original Assignee
AbbVie Deutschland GmbH and Co KG
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Publication date
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Priority to EP07822833.5A priority Critical patent/EP2081759B1/fr
Publication of EP2081759A1 publication Critical patent/EP2081759A1/fr
Application granted granted Critical
Publication of EP2081759B1 publication Critical patent/EP2081759B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/14—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds on a movable carrier other than a turntable or a rotating drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0082—Dust eliminating means; Mould or press ram cleaning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
    • B30B15/306—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds for multi-layer articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof

Definitions

  • the present invention relates to an apparatus for forming moldings from a moldable mass.
  • the device comprises a die grid, in which at least one receiving space formed by side boundaries is formed, and at least one tool, with which the moldable mass in the receiving space can be pressed.
  • the invention relates to a method for forming moldings, in which a moldable mass is formed. The moldable mass is fed to a die grid and portioned in a receiving space. After portioning, at least one tool presses the portions of the moldable mass in the receiving space to the moldings.
  • rotary tabletting machines for example, the mass to be formed, which is in the form of bulk material, is fed via a fixed filling device into a likewise fixed die table, into which receiving space (dies) the bulk material is filled.
  • receiving space dies
  • Above and below the receiving space stamp are arranged, which are guided for pressing the bulk material over an upper and a lower pressure roller.
  • the pressure rollers By the pressure rollers, the stamp are moved towards each other, whereby initially a rising and after exceeding the vertex, a falling pressure is exerted on the bulk material, whereby it is compressed into a tablet.
  • a conventional rotary tableting machine for example, in DE 37 14 031 A1 described.
  • a disadvantage of known tabletting machines is that the time interval during which the pressure required for pressing is exerted on the moldable mass is limited. For many applications, it is desirable to extend the so-called pressure hold time. This is possible with conventional tableting machines only with a small time window.
  • the calendering process with two calender rolls is further developed by a so-called chain calender, as described in US Pat EP 0 358 105 B1 is described.
  • this chain calender the still deformable strand of the extruder is compressed between two strips which contact each other on the lateral surface, circulate in opposite directions and run parallel on the contact section, or between a roller and a strip resting on a segment of the roll shell and circulating with it.
  • the shaping recesses are mounted in two or only in one of the circumferential shaping elements.
  • this manufacturing method has the disadvantage that no specific mass adjustments can be made without bringing the individual doses considerably out of shape, because of the lack of lateral all-round guides.
  • mass corrections to the moldings are only very limited possible, thereby conditionally a format change is excluded towards heavier or lighter moldings.
  • the tablets are molded directly in the receiving spaces of a blister pack.
  • a filling block is arranged above the blister pack.
  • the mass to be molded is filled through a metering device through channels of the filling block.
  • the filler block is located directly above the blister pack.
  • the tablets are formed by moving a punch down with a block until the block abuts the surfaces of the filling block. Thereafter, the punches are lowered further and form the tablets.
  • the device comprises a mold and a filling frame.
  • Ceiling tiles can be inserted in the filling frames from above.
  • Bottom plates can be inserted into the mold through the mold cavities from below. The bottom plates are raised at the beginning of the molding process, so that a closed bottom surface is formed.
  • the floor panels are lowered and the ceiling panels shut down and formed by applying pressure, the moldings in the mold cavities.
  • the proportion of supplied mouldable mass, which is not formed into a molding should be as low as possible.
  • the device according to the invention comprises a displacement bulkhead to be moved onto the die grid for portioning the moldable mass, wherein the displacement bulkhead comprises side boundaries which correspond to the side boundaries of the die grid.
  • the moldable mass is pre-portioned by the displacement bulkhead, wherein in addition the material overhangs on the matrix grid are largely completely displaced into the receiving spaces of the matrix grid and the matrix grid then forms a completely enclosed space around the individual masses, which subsequently has correspondingly adjustable volumes Press through the tools pressing down in the die grid.
  • moldings can be produced which have no edge burrs and no offset, so that no further post-processing is required.
  • smooth surface structures and complicated geometries of the moldings can be realized.
  • the side boundaries of the displacement bulkhead are aligned with the lateral boundaries of the matrix grid.
  • the thickness of the side boundaries of the die grid corresponds in particular to the thickness of the side boundaries of the displacement partition.
  • the side boundaries of the displacement bulkhead and the side boundaries of the matrix grid have end faces which at least partly come to rest when the displacement bulkhead and the matrix grid are moved towards each other completely.
  • the respective end faces have in particular the same geometry.
  • the matrix grid may comprise a square, rectangular, diamond-shaped or circular grid. The same grid is then formed by the side boundaries of the displacement bulkhead, so that the end faces each match.
  • the transition from the end faces to the side boundaries of the die grid and / or the displacement partition is rounded off or bevelled.
  • the tool can be guided from the side boundaries of the displacement bulkhead into the receiving space.
  • the displacement bulkhead can thus fulfill a dual function. On the one hand, it serves to portion the moldable mass. On the other hand, it serves as a guide for the tool.
  • a further die-side tool for the at least one receiving space can be guided from the opposite side of the displacement-side tool into the receiving space. In this way, the moldable mass can be pressed in this receiving space from two sides.
  • the die grid in particular a plurality of receiving spaces is formed, each associated with a displacement-side tool and a die-side tool.
  • the displacement bulkhead-side tools and / or the die-side tools can be mounted in a respective tool carrier. They are particularly secured floating in the tool carrier.
  • the tools can be cooled and / or heated in particular for certain moldable masses.
  • the displacement bulkhead is coupled to the tool carrier for the displacement bulkhead-side tools.
  • the displacement bulkhead is in particular movable relative to the tool carrier against the force of at least one spring.
  • At least one tool carrier is movable along a guideway having a forming section in which a constant pressure is exerted by the tools on the portions of the mouldable mass located in the receiving spaces over a distance.
  • the shaping section of the guideway runs in particular in a straight line.
  • the tool carrier is held in particular via a slotted guide in the guideway. Furthermore, a separate guideway may be provided for the tool carrier of the displacement bulkhead-side tools and the tool carrier for the die-side tools.
  • At least one tool carrier along the guideway at least partially runs on guide rollers, wherein at least in the forming section of the guideway, the guide rollers with respect to their distance to the tool carrier of displacement-side tools adjustable.
  • a molding pressure can be set according to the mass properties to be molded.
  • the volumes to be set of the different masses to be pressed are adjusted by means of the height-adjustable die grid.
  • tolerances of the guideway in the forming section can be compensated.
  • a cooling section of the guideway in which cool the pressed moldings in the die grid.
  • a sampling station for removing one or more moldings can be arranged, which can be fed to a quality control. Subsequently, a sampling and camera inspection station for removal and examination the moldings, a cleaning station for at least the tools, the displacement barrier and the matrix grid, and finally a shaping space coating device, in which the parts of the device which come into contact with the moldable material are coated to avoid adhesions.
  • the tool cleaning and the molding space coating can thus be carried out continuously during the ongoing production process.
  • an online control during the ongoing manufacturing process and an online mass correction of the moldings are possible.
  • an online 100% visual inspection by means of a camera as well as online NIR for various analytical data collections are possible.
  • the tool carrier is coupled via a telescopic arm with a rotatable drive unit, so that the tool carrier can be guided over a closed curve.
  • the drive unit may be the only driven unit of the device according to the invention.
  • a telescopic arm is provided for the tool carrier of the displacement-side tools and the tool carrier of the die-side tools.
  • the telescopic arm or the telescopic arms can in particular be mounted so as to be pivotable about an axis tangential with respect to the rotation of the drive unit.
  • the length of the telescopic arm is variable.
  • the tool carrier is coupled in this case via a horizontal / vertical fork joint with the telescopic arm. In this way, the tool carrier can move radially along the guide track to the drive unit or away from the drive unit.
  • the tool carrier can be pivoted upwards and downwards in a horizontal plane of rotation.
  • the device comprises in particular an extruder, wherein the melt ribbon is continuously fed to the die grid.
  • a shaping device for smoothing and aligning a melt strand ejected from the extruder to the melt belt is arranged between the extruder and the die grid.
  • the width of the melt ribbon can be shaped to correspond to the width of the die grid.
  • the thickness of the melt ribbon can thereby be adjusted so that the weight of the individual portions of the mass is adjusted.
  • the melt ribbon may comprise several layers of different composition.
  • the extruder can be designed in particular for two- or three-component extrusion, wherein the various components can be in different sequences to each other.
  • films and moldings with a product sequence ABA or ABCBA can be formed.
  • product sequences may be used for the manufacture of medical products, e.g. used in the manufacture of lingual and sublingual slides / tablets as well as transdermal patches. Such products can be very easily produced on the device according to the invention.
  • a moldable mass is formed and fed to a die grid so that it rests on the end faces of side boundaries of the die grid.
  • a displacement barrier having side boundaries corresponding to the side boundaries of the die grid is then moved toward the die grid, thereby displacing the portion of the moldable mass resting on the side boundaries of the die grid in the direction of a receiving space formed by the die grid between the side boundaries such that shapable mass is portioned.
  • At least one tool then compresses the portions of the moldable mass in the receiving space.
  • the moldable mass is fed continuously to the matrix grid.
  • the displacement bulkhead is moved toward the die grid in such a way that the side boundaries of the displacement bulkhead are aligned with the side boundaries of the die grid.
  • the displacement bulkhead is moved towards the die grid until the end faces of the side boundaries of the displacement bulkhead rest at least in part on the end faces of the side boundaries of the die grid.
  • the displacement barrier can be moved in particular against the force of at least one spring on the die grid.
  • a further die-side tool for the at least one receiving space is guided from the opposite side of the displacement-bulkhead-side tool into the receiving space.
  • a multiplicity of receiving spaces can be formed in the die grid.
  • the moldable mass in each receiving space is inserted Pressure exerted by a displacement bulkhead-side tool and a die-side tool.
  • the displacement-bulkhead-side tools and / or the die-side tools are in particular mounted in a respective tool carrier.
  • at least one tool carrier is moved along a guideway, which has a shaping section in which a constant pressure is exerted by the tools on the portions of the mouldable mass located in the receiving spaces over a distance.
  • the tool carrier is coupled in particular via a telescopic arm with a drive unit. It is moved by means of this drive unit, so that the tool carrier is guided on the guideway via a closed curve.
  • a malleable mass is understood to mean any mass which changes its shape under the action of a force.
  • a melt strand is formed, which is fed to the matrix grid continuously.
  • the melt strand is preferably smoothed and aligned before it is fed to the die grid.
  • the following application features can be realized: by means of a so-called protective extrusion, sensitive active substances can be shielded; multi-layer extrusion can be used to produce a molded article or a multi-layer tablet which has a faster release of the outer layer and a delayed release of the inner layer, multicomponent drug delivery and cascade drug release can be realized, and different variations in the thickness of the individual layers enable different release profiles to be realized.
  • multilayer moldings for the food, cosmetics and hygiene industries can thus be produced well.
  • the device comprises an extruder 1, with which a moldable mass can be formed. From the nozzle of the extruder 1, the moldable mass is transferred to a rotating mechanical system in which the moldings are formed.
  • the basic structure of this rotating mechanical system will be explained below.
  • a rotatable drive unit 2 is provided, are attached to which radially outwardly extending telescopic arms 5. At the radially outer ends of the telescopic arms 5 forming units 4 are attached.
  • a molding unit is composed of an upper part 4A and a lower part 4B. Both for the upper part 4A and for the lower part 4B a telescopic arm 5A and 5B is provided.
  • the telescopic arm 5A for the upper part 4A and that 5B for the lower part 4B of the forming unit 4 are arranged vertically one above the other vertically.
  • the drive unit 2 thus comprises, in an upper horizontal plane, the telescopic arms 5A for the upper part 4A of FIG Shaping unit 4 and in a lower horizontal plane, the telescopic arms 5B for the lower part 4B of the forming unit 4.
  • the telescopic arms 5 with the forming units 4 are thus moved by the drive unit 2 substantially in an upper and a lower horizontal plane.
  • the shaping units 4 are guided on a guideway 3.
  • the guideway 3 describes a closed curve with straight sections A and B (FIG. Fig. 2 ) and a semicircular portion disposed opposite to the sections A and B. So that the shaping units 4 can be guided by a rotation of the drive unit 2 on this guideway 3, the radial length of the telescopic arms 5 is variable.
  • the guide track 3 can also change the position of the shaping units 4 in the vertical direction.
  • the telescopic arms 5 can perform a vertical pivoting movement, ie a pivoting movement about axis, which is parallel to a tangential with respect to the rotational movement of the drive unit 2 axis.
  • lateral guides are provided on the drive unit 2 in the axle fastenings of the telescopic arms 5.
  • the telescopic arms 5 can thus be moved horizontally by the drive unit 2, wherein they can perform vertical pivoting movements during this movement, the paths being predetermined by the guide track 3.
  • a forming section A in which the guide track 3 extends on a straight line.
  • the shaping section A is adjoined by a cooling-down section B, which can also run on a straight path.
  • the guideway 3 changes its direction in a 90 ° bend and feeds the forming units 4 at the section C to a sampling station 6.
  • the guide track 3 describes a semicircle on which the forming units 4 at a section D of a mold removal and camera inspection station 7, the section E of a cleaning station 8 and the section F of a Formungsraumbezels responded 9 is supplied. The individual stations and facilities of these sections will be described later in detail.
  • the forming units 4 After the forming units 4 have left the forming space coating device 9, they are guided back to the forming section A via a 90 ° bend. Since the closely arranged forming units 4 in this constellation can not perform over its diagonal away a curve movement, evasive travel curves are formed for the guideway, which in the following with reference to the Fig. 3 to 5 be explained:
  • the Fig. 3 shows an upper guide track 3A for the upper part 4A of the forming unit 4 and a lower guide track 3B for the lower part 4B of the forming unit 4.
  • Fig. 3 2 the movement apart of the upper and lower parts 4A and 4B of the molding unit 4 is shown.
  • Fig. 4 shows the merging of the respective parts of the molding unit 4.
  • the upper guide track 3A and the lower guide track 3B each share again in an upper and lower part, on each of which alternately the two parts of the forming unit 4 are supplied.
  • the control is carried out via points, which causes the diversion into the respective travel curve.
  • Fig. 5 Fig. 12 is a side view showing the movement of the upper telescopic arm 5A for the upper part 4A of the forming unit 4 and the lower telescopic arm 5B for the lower part 4B of the forming unit 4.
  • a per se known extruder 1 can be used.
  • the design of the extruder 1 depends on the mass that is to be processed in the extruder 1.
  • the masses to be processed may be intended for use in the pharmaceutical industry, in the food industry, as well as in the cosmetics and hygiene industries.
  • a plastic melt is produced, which is ejected in the extruder die 10 as a melt strand 11.
  • the melt strand 11 can be formed from only one melt.
  • it is also possible to form a multilayer melt strand 11 which, for example, comprises two components A and B in three layers of the sequence ABA includes.
  • the melt strand 11 ejected from the extruder die 10 is fed to a forming station 13, in which counter-rotating rolls 12A and 12B smooth the melt strand 11 into a melt ribbon 14. Furthermore, in the forming station 13, the width of the melt belt 14 can be set exactly. The width of the melt belt 14 depends on the width of the die grid 19, as will be explained later. The width is created by taperedêtsleitbleche. Corresponding side-prone preform prisms 12B take on the task of mass reduction on the sides of the melt belt.
  • the 8B to 8D show the interaction of the rollers 12A and 12B of the molding station and the shaping of the melt strand 11 to the melt belt 14 after the material exit from the nozzle 10.
  • the roll and prism movements can be controlled depending on the volume and the density of the melt by means of software.
  • the Ausformstation thus the thickness and the width of the melt strip from which the moldings are formed, adjusted exactly. This setting ensures that the masses of the individual blanks are always the same. Furthermore, the height and thus the mass of the molded article to be formed can be adjusted via the thickness of the melt belt 14. In the forming station, a precompression of the moldable mass takes place, which leads to a higher stability of the melt belt 14. The thickness of the melt belt 14 depends on the consistency of the melt, their density and the desired individual weights of the moldings to be produced therefrom.
  • the molding units 4 are guided on the guide track so that the upper part 4A of the molding unit 4 the lower part 4B of the molding unit 4 behind the molding station 13 for the melt of the extruder 1 approximated. They form in this shaping section A ( Fig. 2 ) a unit through which the moldings are formed from the melt belt 14.
  • the forming unit 4 comprises a tool carrier 15 which is divided into an upper tool carrier 15A and a lower tool carrier 15B.
  • the upper tool carrier 15A is fixed to an upper telescopic arm 5A
  • the lower tool carrier 15B is fixed to a lower telescopic arm 5B.
  • the telescopic arms 5A and 5B are arranged in a vertical plane parallel to each other. As already related to the Fig. 1 and 2 described, they are moved horizontally, where they can perform vertical pivoting movements corresponding to the guideway 3.
  • the upper and lower tool carriers 15A and 15B are aligned with each other by guide rods 22. Guided by these guide rods 22, the upper and lower tool carriers 15A and 15B can be further moved toward each other.
  • the upper and lower tool carriers 15A and 15B each include a plurality of guide pins 16A and 16B, respectively, which hold and guide the upper tool carrier 15A in two upper guide tracks 3A.
  • the two upper guide tracks 3A are arranged at the same level at different radii with respect to the rotational movement of the drive unit 2.
  • the lower guide bolts 16B hold and guide the lower tool carrier 15B in lower guide tracks 3B, respectively.
  • three guide pins 16A and 16B are respectively provided for the upper and lower tool carriers 15A and 15B. They hold the two tool carrier parts 15A and 15B in a horizontal position, respectively.
  • two guide pins 15A and 15B are respectively disposed on the outer guide track 3A and 3B, and the single guide pins 16A and 16B on the inner track 3A and 3B, respectively, for safe cornering of the tool carrier 15 receive.
  • the upper and lower tool carriers 15A and 15B receive the same number of identical tools 17 and 18, respectively. Further, between the upper tool carrier 15A and the lower tool carrier 15B, a die grid 19 and a displacement barrier 38 are arranged, as will be explained later in detail. Both the die grid 19 and the displacement barrier 38 are guided by means of the guide rods 22.
  • the telescopic arm 5 comprises two mutually displaceable parts, so that the length of the telescopic arm is variable. In this way, the radial distance of the tool carrier 15 from the drive unit 2 can be changed.
  • a horizontal / vertical two-axis fork joint 23 is attached.
  • the two-axis fork joint 23 comprises a fixing unit 24, which is fastened to the radially outer end of the telescopic arm 5.
  • the horizontal joint 26 of the two-axis fork joint 23 is fastened to the fastening unit 24 via a bolt 25.
  • the horizontal joint 26 is pivotable about the axis of the bolt 25 in a first plane.
  • this first plane is aligned horizontally.
  • the vertical joint 28 of the two-axis fork joint 23 is attached via a further bolt 27.
  • the vertical joint 28 is pivotable in a second plane, which is perpendicular to the first plane.
  • the vertical joint 28 is pivotable in a vertical plane.
  • the upper or lower tool carrier 15A or 15B is fastened to the vertical joint 28.
  • the two-axis fork joint 23 thus provides a firm connection between the telescopic arm 5 and the corresponding part of the tool carrier 15. In this way, the tool holder 15 can smoothly and smoothly reach all positions in all three spatial axes within the path of the guideway 3.
  • the telescopic arms 5 ensure that the force of the drive unit 2 is transmitted to the tool carriers 15 connected to them so that they move on the predetermined guide track 3 can.
  • the two-axis fork joint 23 and the vertical pivoting of the telescopic arm 5 ensure that each individual movement of the tool carrier 15 can be compensated for transmitting force on the guideway 3.
  • the lower guide pins 16B comprise a mushroom head 29 which is located in all sections of the guide track 3 other than the shaping section A (FIG. Fig. 2 ) is held and guided in a slotted guide 33.
  • This slide guide is in Fig. 13 shown.
  • the storage and guidance in the forming section A is in the Fig. 11 and 12 shown.
  • the guide pin 16B leaves the slide guide 33 and is guided and held by a guide roller system.
  • the guide roller system comprises closely spaced guide rollers 30 which are rotatable in the direction of the guide track 3B.
  • the end face of the mushroom head 29 always rests on two guide rollers 30 in order to ensure smooth running of the lower tool carrier 15B.
  • two side guide plates 32 are arranged on both sides of the mushroom head 29 of the guide pin 16B.
  • a separately controllable level control 31 is provided, which can move or adjust the height of the guide roller 30.
  • the Endverformungs can be regulated.
  • the level control 31 can be coupled to a weighing cell unit, which adjoins the camera inspection station 7.
  • the load cell unit may have a programmable logic controller to transmit a controlled variable to the level control 31 to the immersion depths of the individual To regulate tools 17 and 18, whereby a mass change of the individual moldings is achieved, as will be explained later.
  • the mounting and guiding of the upper tool carrier 15A over the upper guide pins 16A in the upper guide tracks 3A essentially corresponds to the guidance and the mounting of the lower tool carrier 15B.
  • the mushroom head 29 of the upper guide pin 16A is received by a slotted guide 33 of the upper guide track 3A.
  • a slotted guide 33 is also provided in the shaping section A, since it is not necessary to adjust both the lower tool carrier 15B and the upper tool carrier 15A in the vertical direction.
  • FIGS. 14 to 19 various examples of tools 17, 18 and their attachment in the tool carrier 15A and 15B are explained.
  • the FIGS. 14 to 19 show the tools 18 which are attached to the lower tool carrier 15B.
  • the tools 17 may be identical or similar to the tools 18 and similarly secured to the upper tool carrier 15A.
  • the tools 17 and 18 are formed like a stamp. They have an end face 35, which, as in the Figs. 14A to 16A shown, is selected according to the desired molding surface.
  • the tools 17 and 18 are floating in the tool carrier 15A, secured once or twice by means of internal locking bars 34 against falling out. This ensures a very dense arrangement of the tools 17 and 18, respectively.
  • the number of securing rods 34 depends on the intended use of the tools 17 and 18 and on their function.
  • a special tool 36 is shown. It includes heating or cooling holes 37 into which a fluid may be introduced to heat or cool the tool 36.
  • the radially inner side of the upper tool carrier 15A is connected to the telescopic arm 5A via the two-axis fork joint 23, as described with reference to FIGS Fig. 10 was explained.
  • the upper side of the upper tool carrier 15A is mounted on the upper guide pin 16A in the slotted guide 33 of the upper guide track 3A.
  • the tools 17 are mounted on the securing rods 34 in the lower side of the upper tool carrier 15A, as described with reference to FIGS FIGS. 14 to 19 was explained.
  • the displacement barrier 38 is coupled to the upper tool carrier 15A via the connection mechanism 41.
  • the linkage mechanism 41 includes a spring 42 which holds the displacement bulkhead 38 in the rest position of the spring 42 so that the upper surface of the displacement bulkhead 38 is spaced from the lower surface of the upper tool carrier 15A. Against the force of the spring 42, the displacement barrier 38 can be moved vertically in the direction of the upper tool carrier 15A.
  • the displacement barrier 38 is described in detail in FIG Fig. 21 shown. It comprises a grid in which the openings of the grid are delimited by lateral boundaries 39 of the displacement bulkhead 38. At the in Fig. 21 rectangular grid structure shown, each opening of the grid is delimited by four side walls. The underside of the grid of the displacement bulkhead 38 has a grid-like end face 40. Finally, the displacement barrier 38 has bores 44 for the guide rods 22 of the tool carrier 15 (FIG. Fig. 9 ).
  • the lower tool carrier 15B is coupled to the lower telescopic arm 5B via the two-axis fork joint 23, as described with reference to FIGS Fig. 10 was explained.
  • the lower side of the lower tool carrier 15B is above the lower guide pins 16B via the slotted guide 33 or via the reference to Fig. 11 explained guided roller system guided and stored.
  • the tools 18 are mounted on the securing rods 34 in the upper side of the lower tool carrier 15B.
  • the die grid 19 is coupled via the height-adjustable link mechanism 46 to the lower tool carrier 15B.
  • the matrix grid 19 includes receiving spaces 21, which are delimited from lateral boundaries 20.
  • the lower openings of the receiving spaces 21 of the die grid 19 are closed by the tools 18 projecting into the receiving spaces 21. Since the volume of the receiving space 21 determines the volume of the molding to be formed and thus at a certain density and the mass or weight, the mass or the weight of the moldings can be adjusted via the height adjustment of the tools 18.
  • FIG Fig. 23 A plan view of the die grid 19 is shown in FIG Fig. 23 shown.
  • the rectangular grid structure can be seen, which is formed by the end face 45 of the die grid 19.
  • the end faces 35 of the tools 18 can be seen, which protrude into the receiving spaces 21 and which are held over the securing rods 34 in the lower tool carrier 15B.
  • bores for the guide rods 22 are provided in the matrix grid.
  • the tools 17 move in the displacement bulkhead 38 and the tools 18 are located in the receiving spaces 21 of the die grid 19, the tools 17 are also referred to as displacement bulkhead-side tools and the tools 18 as die-side tools.
  • the molding operation takes place on the straight stretch of the molding section A of the guide track 3 (FIG. Fig. 2 ).
  • the upper part 4A of the forming unit 4 that is, the upper tool carrier 15A and the parts connected thereto are vertically moved toward the lower part 4B of the forming unit 4, ie, the lower tool carrier 15B and the parts connected thereto.
  • the melt belt 14 formed by the forming station 13 is supplied to the lower part 4B of the molding unit 4. How out Fig. 24A it can be seen, while the melt belt 14 comes on the top of the die grid 19, ie in particular on the end face 45, which is formed by the side boundaries 20 of the die grid 19, to rest.
  • the melt strip 14 is thus located above the receiving spaces 21 of the die grid 19.
  • the distance between the bottom of the displacement bulkhead 38 and the top of the die grid 19 is initially greater than the thickness of the melt belt 14, so that this introduced between the die grid 19 and the displacement barrier 38 can be.
  • the upper tool carrier 15A is further lowered with the displacement bulkhead 38 until the lower end face 40 of the displacement bulkhead 38 contacts the upper surface of the melt belt 14.
  • the portion 14A of the melt belt 14, which is located between the end face 45 of the die grid 19 and the end face 40 of the displacement bulkhead 38 is now displaced in the direction of the adjacent receiving spaces 21, as shown in FIGS Figs. 25A and 25B respectively.
  • Figs. 26A and 26B is shown.
  • the distance between the displacement bulkhead 38 to the upper tool carrier 15A decreases against the force of the springs 42.
  • a tilting of the displacement bulkhead 38 is prevented by the guide rods 22.
  • the strength of the springs 42 is designed so that they allow a sinking of the displacement bulkhead 38 in the melt belt 14.
  • the advancing upper tool part 15A thereby increases the pressure which the displacement barrier 38 exerts on the melt belt 14, by means of the ever further moving springs 42.
  • the melt masses 14A below the end face 40 distribute the displacement of the partition 38 in all directions, ie to displace, the edges of the end face 40 of the displacement 38 are specially shaped.
  • a displacement barrier 38 is shown in which the edges of the transition from the end face 40 to the side surfaces of the side boundaries 39 of the displacement partition 38 are rounded.
  • a displacement barrier is shown in which these edges are bevelled. This configuration of the edges serves a lossless and economically optimal production process. In this case, all material supernatants are to be forced into the receiving spaces 21 of the die grid 19.
  • the displacement bulkhead 38 is moved toward the die grid 19 until the end face 40 of the displacement bulkhead 38 rests on the end face 45 of the die grid 19.
  • the lateral boundary 39 of the displacement bulkhead 38 corresponds to the lateral boundaries 20 of the matrix grid 19 and thus to the end surfaces 40 and 45 formed by the lateral boundaries 39 and 20, respectively ,
  • These side boundaries 39 and 20 form the identical lattice structure.
  • the side boundary 39 of the displacement bulkhead 38 has in particular the same thickness as the side boundary 20 of the die grid 19. Furthermore, the side boundaries 39 and 20 are aligned with one another. During the movement of the displacement bulkhead 38 in the direction of the die grid 19, the side boundaries 39 and 20 are aligned exactly parallel to one another.
  • the upper tool carrier 15A further lowers with the tools 17, without the vertical position of the displacement bulkhead 38 being able to continue to change since it rests on the die grid 19.
  • the tools 17 are thus moved in the openings of the displacement bulkhead 38.
  • the side boundaries 39 of the displacement bulkhead 38 serve as a guide for the tools 17.
  • the displacement bulkhead 38 thus serves as a guide chamber for itself lowering tools 17 and as pre-chamber for the mass to be deformed.
  • Fig. 27A shows the force distribution in the receiving space 21 during pressing.
  • pressure is exerted by the tools 17 and 18 from above and below. From the side of the portions of the side boundaries 20 of the matrix grid 19 are enclosed. Since the same pressure is exerted on the lateral boundaries 20 by two adjacent receiving chambers 21, the forces applied to the lateral boundaries 20 cancel each other out. For this reason, the side boundaries 20 and thus also the side boundaries 39 of the displacement bulkhead 38 can be made very thin, whereby a possible residual portion of the melt belt 14, which is not compressed, can be kept extremely low.
  • the pressure exerted by the tools 17 and 18 on the melt portions 14 can be selected depending on the moldings to be formed.
  • a special feature of the device according to the invention is that the pressure holding time, i. the time interval at which the maximum pressure is exerted on the mass to be compacted, can be individually adjusted to the mass to be deformed and tuned to this.
  • the pressure holding time can be chosen to be very long, in particular in comparison to conventional tableting machines. It is essentially determined by the rotational speed of the drive unit 2 and the length of the straight forming section A. If the forming section A is chosen to be very long, the maximum pressure exerted on the mass to be formed is maintained for a very long time.
  • the cooling section B connects.
  • the upper part 4A of the forming unit 4 with the upper tool carrier 15A is in this Section B is again removed in the vertical direction from the lower part 4B of the forming unit 4 with the lower tool carrier 15B.
  • the compressed moldings can cool during the residence time in the cooling section B.
  • this cooling section B can be chosen so long that it is ensured that no unwanted internal stresses remain in the formed products.
  • the cooling station B is followed by the sampling station 6 in the section C. In this station 6 can each be removed by means of a randomized, memory-controlled, individually controllable vacuum blank removal unit a certain number of moldings and transferred to a control device.
  • the blanks removed from the population or their free spaces on the lower tool carrier 15B are transmitted to the blank removal and camera inspection station 7 by means of the integrated programmable logic controller in order to avoid false control messages.
  • the task of this in-process control station is to control the quality-related operation of the device according to the invention, to confirm it or, if necessary, to intervene in the process sequence by means of a programmable logic controller and correspondingly via the level control 31.
  • the section C with the sampling station 6 is followed by the section D with the blank removal and camera inspection station 7, which with reference to Fig. 28 is explained.
  • the rejected goods 7B are separated from the goods 7A (cf. Fig. 2 ).
  • the tools 18 are moved completely into the receiving space 21 of the die grid 19, so that the shaped articles 57 formed are pushed out of the die grid 19 and ready for removal.
  • the vacuum blank removal unit 58 is pivoted between the upper tool carrier 15A and the lower tool carrier 15B so that vacuum pick-up tubes of the molding receiving head 59 are located immediately above the molds 57.
  • the vacuum molding removal unit 58 has the same number of individually controllable vacuum hoses for receiving the moldings 57 as tools 18 and receiving spaces 21 are provided. The moldings are sucked by the vacuum hoses and lifted from the die grid 19.
  • the molding receiving head 59 is swung out of the molding unit 4 by means of the motor 62 and the shaft 61, whereupon the moldings 57 are deposited on a transparent conveyor belt 63.
  • the moldings 57 of a camera inspection unit with an upper camera 64 and a lower camera 65 for examination of the top and bottom and the side edges of the moldings 57 are supplied.
  • the entirety of the formed moldings 57 can be optically examined.
  • the entire geometric shape of the moldings 57 can be examined.
  • the moldings 57 can be examined without contact by means of infrared spectroscopy, in particular NIR spectroscopy. Since the geometrical arrangement of the blanks on the conveyor belt 63 corresponds exactly to that in the die grid 19, conclusions as to defective production in the die grid 19 can be determined for defective blanks 57.
  • the NIR spectroscopy works with the help of chemometric evaluation methods on the qualitative and quantitative analytical sorting of the good production 7A.
  • the individual weights of the moldings 57 can be detected. Deviations from predetermined weight tolerances can be detected in this way and used to sort out faulty blanks. Furthermore, the weighing cell unit can transmit a controlled variable to the level control 31 and / or to the guide rollers, as already explained.
  • the section D is followed by the section E with the cleaning station 8, which will be explained with reference to FIGS. 29, 30A and 30B:
  • a brush head receptacle 49 is attached, which has cleaning bristles 48 in the direction of the upper part 4A and the lower part 4B of the molding unit 4.
  • the bristle head 47 rotates and cleans on it Remove any parts that have come into contact with the mouldable mass.
  • the displacement barrier 38 and the tools 17 as well as the die grid 19 and the tools 18 are cleaned.
  • the brush shaft 50 is unscrewed from the molding unit 4.
  • a rotating device 51 which may comprise three brush heads 47 and corresponding numbers of brush shafts 50.
  • the brushes 50 turned out of the forming unit 4 are then cleaned by means of compressed air 52, which is supplied via the pipe system 53A to the compressed-air nozzles 53B.
  • compressed air 52 which is supplied via the pipe system 53A to the compressed-air nozzles 53B.
  • the entire cleaning process is fully automatic and is integrated in the guideway 3.
  • the cleaning station 8 may operate during ongoing operation of the continuously moving forming units 4.
  • the cleaning station 8 may be equipped with different brushes, compressed air and suction devices. It is fully mobile in all three coordinate directions and equipped with proximity sensors and replacement units.
  • the section E with the cleaning station 8 is followed by the section F with the forming space coating device 9, which will be explained with reference to FIG. 31:
  • the molding space coating device 9 comprises a pipe system 54, with which a coating fluid 56 or a coating powder (mold release agent) can be supplied.
  • the coating fluid 56 or the coating powder exits at the nozzles 55.
  • the number of nozzles 55 corresponds to the number of tools 17 and 18.
  • the task of the molding space coating device 9 is to reduce or eliminate possible adhesion tendencies of the different materials to be processed in order to ensure a smooth production process.
  • the parts of the device which come into contact with the mass to be processed, coated with the coating fluid 56 and the coating powder.
  • the choice of coating fluid depends on the mass to be molded and the intended field of use of the moldings 57 to be formed.
  • the forming units 4 for re-forming moldings are fed to the forming section A on the guide track 3.
  • the moldable mass from which the moldings 57 are formed is not formed by extrusion technology. Rather, in this exemplary embodiment, the mouldable mass is a bulk material 14B of arbitrary composition.
  • the bulk material 14B is in particular powdery, flowable and moldable. It may be, for example, a powdered granules.
  • the device according to the invention may advantageously be used in particular for a bulk material 14B, e.g. be used from the granule technology, which is very poorly deformable, since the pressure holding time can be adjusted in the inventive device to a very long period.
  • the displacement bulkhead 38 in the apparatus of the second embodiment could be omitted. Preferably, however, it still serves to guide the tools 17.
  • the bulk material 14B is filled in the second embodiment by means of a per se known device, as used for example in conventional tableting machines, directly into the receiving spaces 21, as in Fig. 24B is shown.
  • the device can be, for example, a powder distribution system for the uniform discharge of flowable, formable, powdery bulk materials 14B, in which the bulk materials 14B can be continuously fed.
  • the pressing is carried out by the tools 17 and 18 (see. Fig. 27B ) and the further process steps, as described above.
  • the resulting during the molding process pressure energy is transmitted over a longer period of time to the mass to be formed, ie a high pressure is exerted over a longer period of time on the mass to be formed, thereby the material-specific To counteract restoring forces of the masses to be deformed.
  • the pressure can be maintained even during the Auskühlabitess B by the upper part 4A and the lower part 4B of the forming unit 4 apart only after this Auskühlabites B apart. In this way, masses are held with increased elastic restoring forces until solidification or cooling in the plasticizing position.

Claims (12)

  1. Dispositif pour former des pièces moulées (57) à partir d'une masse de moulage avec
    - une grille de matrice (19), dans laquelle est formée au moins une chambre de réception (21) délimitée par des parois latérales (20), et
    - au moins un outil (17, 18), avec lequel la masse de moulage peut être pressée dans la chambre de réception (21),
    caractérisé par
    - une station de façonnage (13), dans laquelle des rouleaux tournant en sens inverse (12A, 12B) lissent et orientent une barre fondue (11) en une bande fondue (14), dans lequel la largeur de la bande fondue (14) peut être réglée dans la station de façonnage (13) de telle manière qu'elle corresponde à la largeur de la grille de matrice,
    - une cloison de refoulement (38) déplaçable vers la grille de matrice (19) pour former des portions de la masse de moulage, dans lequel la cloison de refoulement (38) comprend des parois latérales (39), qui correspondent aux parois latérales (20) de la grille de matrice (19),
    - dans lequel les parois latérales (39) de la cloison de refoulement (38) et les parois latérales (20) de la grille de matrice (19) présentent des faces frontales (40, 45), qui viennent au moins partiellement en appui, lorsque la cloison de refoulement (38) et la grille de matrice (19) sont complètement déplacées l'une vers l'autre, et
    - dans lequel la transition de la face frontale (40) aux parois latérales (20, 39) de la grille de matrice (19) et/ou de la cloison de refoulement (38) est arrondie ou inclinée, afin de refouler de la masse fondue (14A) sous la face frontale (40) de la cloison de refoulement (38) dans toutes les directions lors de l'abaissement de la cloison de refoulement (38) sur la bande fondue (14).
  2. Dispositif selon la revendication 1, caractérisé en ce que les parois latérales (39) de la cloison de refoulement (38) sont en alignement avec les parois latérales (20) de la grille de matrice (19).
  3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'outil (17) peut être guidé dans la chambre de réception (21) par les parois latérales (39) de la cloison de refoulement (38).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un autre outil côté matrice (18) pour ladite au moins une chambre de réception (21) peut être guidé dans la chambre de réception (21) par le côté opposé de l'outil côté cloison de refoulement (18).
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une multiplicité de chambres de réception (21) sont formées dans la grille de matrice (19), auxquelles un outil côté cloison de refoulement (17) et un outil côté matrice (18) sont respectivement associés, en ce que les outils côté cloison de refoulement (17) et/ou les outils côté matrice (18) sont montés respectivement dans un porte-outil (15A, 15B) et en ce que la cloison de refoulement (38) est couplée au porte-outil (15A) pour les outils côté cloison de refoulement (17).
  6. Procédé pour former des pièces moulées (57) par utilisation d'un dispositif selon l'une quelconque des revendications 1 à 5, dans lequel
    - on forme une masse de moulage,
    - on envoie la masse de moulage à une grille de matrice (19), de telle manière que la masse de moulage repose sur la face frontale (45) de parois latérales (20) de la grille de matrice (19),
    - on déplace vers la grille de matrice (19) une cloison de refoulement (38) avec des parois latérales (39), qui correspondent aux parois latérales (20) de la grille de matrice (19), et
    - au moins un outil (17, 18) presse les portions de la masse de moulage dans la chambre de réception (21),
    caractérisé en ce que
    - on lisse et on oriente une barre fondue (11) en une bande fondue (14) au moyen de rouleaux tournant en sens inverse (12A, 12B) d'une station de façonnage (13), dans lequel on règle la largeur de la bande fondue (14) selon la largeur de la grille de matrice (19), et
    - lors du mouvement de la cloison de refoulement (38) vers la grille de matrice (19), on refoule la partie (14A) de la masse de moulage de la bande fondue (14) reposant sur les parois latérales (20) de la grille de matrice (19) en direction d'une chambre de réception (21) formée par la grille de matrice (19) entre les parois latérales (20), de telle manière que la masse de moulage soit divisée en portions.
  7. Procédé selon la revendication 6, caractérisé en ce que l'on déplace la cloison de refoulement (38) vers la grille de matrice (19) de telle manière que les parois latérales (39) de la cloison de refoulement (38) soient en alignement avec les parois latérales (20) de la grille de matrice (19).
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que l'on déplace la cloison de refoulement (38) vers la grille de matrice (19), jusqu'à ce que la face frontale (40) des parois latérales (39) de la cloison de refoulement (38) s'applique au moins en partie sur la face frontale (45) des parois latérales (20) de la grille de matrice (19).
  9. Procédé selon l'une quelconque des revendications 6 à 8, caractérisé en ce que l'on déplace la cloison de refoulement (38) vers la grille de matrice (19) contre la force d'au moins un ressort (42).
  10. Procédé selon l'une quelconque des revendications 6 à 9, caractérisé en ce que lors du pressage on guide l'outil (17) dans la chambre de réception (21) au moyen des parois latérales (39) de la cloison de refoulement (38) .
  11. Procédé selon l'une quelconque des revendications 6 à 10, caractérisé en ce que lors du pressage on guide un autre outil côté matrice (18) pour ladite au moins une chambre de réception (21) dans la chambre de réception (21) au moyen du côté opposé de l'outil côté cloison de refoulement (17).
  12. Procédé selon la revendication 11, caractérisé en ce qu'une multiplicité de chambres de réception (21) sont formées dans la grille de matrice (19) et on exerce lors du pressage une pression sur la masse de moulage dans chaque chambre de réception (21) au moyen d'un outil côté cloison de refoulement (17) et d'un outil côté matrice (18).
EP07822833.5A 2006-11-24 2007-11-23 Procédé et dispositif de moulage à cycles de rotation à haut rendement Not-in-force EP2081759B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07822833.5A EP2081759B1 (fr) 2006-11-24 2007-11-23 Procédé et dispositif de moulage à cycles de rotation à haut rendement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06024451A EP1925442A1 (fr) 2006-11-24 2006-11-24 Appareil et procédé de moulage haute performance suivant un parcours rotatif
PCT/EP2007/062735 WO2008062055A1 (fr) 2006-11-24 2007-11-23 Procédé et dispositif de moulage à cycles de rotation à haut rendement
EP07822833.5A EP2081759B1 (fr) 2006-11-24 2007-11-23 Procédé et dispositif de moulage à cycles de rotation à haut rendement

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EP2081759A1 EP2081759A1 (fr) 2009-07-29
EP2081759B1 true EP2081759B1 (fr) 2019-01-02

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EP06024451A Withdrawn EP1925442A1 (fr) 2006-11-24 2006-11-24 Appareil et procédé de moulage haute performance suivant un parcours rotatif
EP07822833.5A Not-in-force EP2081759B1 (fr) 2006-11-24 2007-11-23 Procédé et dispositif de moulage à cycles de rotation à haut rendement

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EP (2) EP1925442A1 (fr)
WO (1) WO2008062055A1 (fr)

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EP1925441A1 (fr) 2006-11-24 2008-05-28 Abbott GmbH & Co. KG Appareil et procédé pour former des moulages à partir d'une masse à mouler

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Also Published As

Publication number Publication date
EP1925442A1 (fr) 2008-05-28
WO2008062055A1 (fr) 2008-05-29
US8277212B2 (en) 2012-10-02
EP2081759A1 (fr) 2009-07-29
US20100072666A1 (en) 2010-03-25

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