WO1996033808A1 - Procede de mouture et moulin a cylindres pour la mouture d'aliments destines a la consommation humaine ou animale - Google Patents

Procede de mouture et moulin a cylindres pour la mouture d'aliments destines a la consommation humaine ou animale Download PDF

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Publication number
WO1996033808A1
WO1996033808A1 PCT/CH1996/000146 CH9600146W WO9633808A1 WO 1996033808 A1 WO1996033808 A1 WO 1996033808A1 CH 9600146 W CH9600146 W CH 9600146W WO 9633808 A1 WO9633808 A1 WO 9633808A1
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WO
WIPO (PCT)
Prior art keywords
grinding
roller
rollers
double
mill
Prior art date
Application number
PCT/CH1996/000146
Other languages
German (de)
English (en)
Inventor
Bruno Gmür
Original Assignee
Bühler AG
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 Bühler AG filed Critical Bühler AG
Publication of WO1996033808A1 publication Critical patent/WO1996033808A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/06—Crushing or disintegrating by roller mills with two or more rollers specially adapted for milling grain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • B02C4/38—Adjusting, applying pressure to, or controlling the distance between, milling members in grain mills

Definitions

  • the invention relates to a method for the gradual extraction of grain products such as. Flour, semolina, haze etc. according to the principle of high-level milling, in which the ground material is ground at least six times, preferably eight to twenty times, and repeatedly sieved.
  • the invention further relates to a roller mill for the grinding of food and feed or other bulk goods, with two grinding units arranged next to one another, each having its own feed control and a separate regrind removal system, with at least one of the grinding units having a two-stage consecutive grinding an individual adjustment device for the grinding gap and a direct transfer of the grinding material within the two-stage grinding is provided.
  • the Hochmüllerei is characterized by a sequence of e.g. 10 to 30 grinding and sieving or viewing stages. For this, the double unit, as a 4-roll mill, has prevailed.
  • the Hochmüllerei can not only be used for a variety of different products, but also for specific product qualities such as Semolina for the pasta industry or flour for automatic baking lines for bread and other pastries.
  • the individual grain proportions: shells, endosperm and germs etc. can be obtained almost completely separately from grinding stage to grinding stage.
  • the large number of grinding stages also allows a gentle grinding process, so that damage to the starch or the protein is either avoided or can be achieved in a very targeted manner.
  • the latest roll mill concept is the 8-roll mill described in EP-PS No. 334 919.
  • the 8-roll mill is a follow-up development of the 4-roll mill and, from a mechanical engineering point of view, consists of two 4-roll mills placed one above the other.
  • the 8-roller mill also allows grinding according to the principle of high-level milling. The product is ground twice in each double stage and only then screened or sifted, so that a part of the screen area can be saved.
  • the 8-roll mill according to EP-PS No. 334 919 represents a successful compromise for grain mills. However, the considerable height of the 8-roll mill makes installing and removing the upper rolls more difficult.
  • the costs for the production and assembly for an 8-roll mill are not much lower than for two 4-roll mills, since the effort for driving and overdriving is the same.
  • the invention was based on the object of creating a process suitable for high-level milling or a roll mill suitable therefor, with correspondingly high throughput rates for large mills.
  • the new roller mill is said to have a lower overall height than the eight-high roller mill and at the same time has a less complex drive with a more favorable distribution of forces and should preferably be less expensive to assemble and manufacture.
  • the process according to the invention is characterized in that, in several or all stages, regrind is fed twice by means of a feed control and is double-milled between a fixed guide roller and two grinder rollers which can be set one above the other, the regrind directly from the upper one via the fixed guide roller transferred to the grinding roller arranged below without sieving and then the material is sieved or sifted after double grinding.
  • the roller mill according to the invention is characterized in that at least one of the two grinding units has a double grinding unit with an inner guide roller and two outer, arranged one above the other, adjustable to the inner guide roller grinding rollers with a common drive.
  • the uniform product curtain formed by the feed device or feed control and the upper grinding is fed over the entire width via the guide roller in film-like fashion to the lower grinding gap as an intact product curtain.
  • the guide roller thus has an additional function as a feed roller for the second grinding, which acts across the entire width.
  • additional influence can be exerted on the product curtain between the two grindings of a double grind, so that the grinding conditions can be optimized even with the most difficult regrinds at maximum throughput.
  • the product curtain falls after the first grinding without any influence, partly in a throwing parabola and partly simply in free fall in the direction of the lower grinding gap.
  • the collecting funnel has only an auxiliary function because the falling product stream does not hit the grinding gap exactly and should collect the fanned product stream again.
  • the new invention allows true double grinding. With an exaggerated picture, it could be shown that the regrind on a kitchen board is reduced with two knife action, whereas in the previous double grinding of the 8-roller chair, the regrind is brought from a first kitchen board to a second and independently reduced twice. New is wed twice against the same Leitwaize.
  • the guide roller guides the regrind from the upper grinding stage directly to the lower one and helps or supports the transfer.
  • the new roller mill can be built as a 5 or 6 roller mill and solves the task in a surprisingly simple way. There are unexpectedly many new solutions. As a special advantage, the 6-roll mill has two real double grindings, in contrast to the well-known 8-roll mill, which has only two or two successive grindings.
  • the guide roller supports the introduction of the ground material into the second grinding gap in the sense of an accelerating feed roller.
  • An actual transfer channel or guide channel is preferably formed for the product transfer, which preferably prevents the product curtain from spreading apart.
  • the guide channel is preferably made very narrow or narrow for floury goods.
  • the new roller mill can thus be equipped or retrofitted optionally for two single or two double grindings or for one double and one single grind. Single grinding can e.g. be built according to the known solution of DE-PS No. 27 30 166.
  • Each adjustable grinding roller can preferably be adjusted to the guide roller via an independent adjusting device, for adjusting the grinding gap and / or the grinding pressure.
  • Each grinding gap can thus be selectively set in the same way as with the known 4- and 8-roll mills.
  • the two adjustable grinding rollers of each double grinding unit have symmetrically arranged bearing arms, which are pivotally mounted in an assembly via a common bearing axis.
  • the common bearing axis can be designed mechanically, pneumatically or electrically, adjustable via control means and eccentric, for a common engagement and disengagement of the two grinding rollers of a double grinding unit. In this way, all basic functions, as required by the roller mill for high-level milling, are fulfilled.
  • the diameters of the individual rollers can basically be freely selected within the framework of classic milling practice and are preferably within a range from 150 mm to 600 mm. It is also possible for all three rolls of a grinding unit to have an identical or only slightly different diameter in the case of double grinding. At least if greater wear on the rollers is expected, it is proposed that the guide roller of a double grinding unit have a larger, preferably 1.6 to 2 times larger diameter than the adjustable grinding rollers, the two adjustable grinding rollers particularly preferably having the same diameter. If the fixed roller is the faster-running roller, this results in approximately uniform wear for all three rollers of a grinding unit. The combination of a large guide roller with feed rollers with a smaller diameter also brings about a significant improvement in product intake and thus higher performance.
  • the feedable grinding roller can also be driven as a faster-running roller for the lower grinding stage, and the crop flow can be directed onto the faster-running roller.
  • the guide roller is preferably driven directly by a drive motor.
  • the overdrive on the smaller, deliverable rollers can be dimensioned smaller for the power to be transferred. If the product control after the first grinding is considered an imperative, the distance between the two can be Grinding rollers are about a hand's width or more. If no product control between the two grinding rollers is required, the distance can be reduced to a few centimeters or millimeters.
  • the two adjustable grinding rollers are together at approximately the same height as the guide roller, or only slightly protrude below and above.
  • the upper adjustable grinding roller is arranged diagonally with respect to the fixed roller, the respective diagonal being at an angle of approximately 45 °, preferably less than 45 °, to the horizontal.
  • This configuration is based deliberately on the optimal values of the known older milling roller mills with diagonally arranged roller pairs.
  • the inclined position is advantageously chosen such that the diagonal of the upper grinding roller is at an angle of 30 ° to 50 ° and the diagonal of the lower grinding roller is at an angle of 10 ° to 25 ° to the horizontal. This results in an optimal intake for both grindings, even with the highest throughputs.
  • an actual channel for the product transfer is formed between the two mills lying one above the other.
  • the channel is essentially defined internally by the guide roller and externally by fixed guide plates, which can also be part of roller scrapers, and preferably has an approximately constant cross section from top to bottom.
  • a bearing block is arranged on both sides for each grinding unit, in which the guide roller and the adjustable grinding rollers, respectively.
  • the common pivot point of the bearing arms and the adjusting clamping device are non-positively supported or connected.
  • the entire roller mill substructure and superstructure can be built correspondingly lighter.
  • the roller mill on each side a common bridgehead-like base with motor consoles, respectively.
  • Flanges has, for non-positive mounting of the bearing blocks and the drive motors. For the first time, it was possible to combine all of the force elements, including the drive motor and the overdrive, in a robust milling unit in a milling roller mill.
  • each pair of rollers must be mounted separately from the machine for all standard 4 and 8 roller mills. This not only increases the cost of assembly, but is also one of the sources of harmful vibrations and forces in the building.
  • the bearing blocks can, for example, according to the new invention via damping elements. be supported in the form of flat rubber liners. Another very advantageous solution lies in the fact that each grinding unit as a whole, as a set of 3 rolls and / or that each roll can or can be installed and removed individually in the roll mill, with the double grinding units, the adjustable grinding rolls using the bearing arms over the bearing axis from the Roller mill can be swung out.
  • each grinding unit requires only one main drive, preferably mounted on the roller mill and acting on the fixed roller.
  • the adjustable grinding rollers have a common overdrive from the fixed roller, which e.g. can be designed as a gear overdrive, as a chain, belt or toothed V-belt overdrive.
  • the bridgehead-like pedestal, together with the bearing blocks, forms a frame in which all grinding and driving forces are closed, so that the entire roller mill can be mounted on the floor via vibration damping elements.
  • the new roller mill rests on the two bridgehead-like side stands, which preferably have cutouts in the middle for the installation of the drive motors. In this way, the roller mill can already be assembled by the manufacturer as a ready-to-use assembly unit with built-in motors.
  • the new invention also allows closed formwork with a control door to be provided after each grinding passage.
  • the upper grinding roller can have a scraper with a subsequent product discharge plate and the lower grinding roller can have an insertion guide plate. An approximately hand-wide distance can be provided between the discharge plate and the inlet guide plate if a removal of regrind samples is required. It is also possible to arrange at least one further roller in the area below the grinding rollers, in the form of an opening roller or a friction unit.
  • a very special advantage of the new invention is also that the device for the adjustment of the size of the grinding gap and the roller pressure is non-positively guided directly to the bearing block, namely as a common group for gap adjustment and roller tension with separate grinding gap setting with lever systems and with separate engagement and disengagement device acting simultaneously on both grinding rollers.
  • Each batching unit can also be designed as a 4-roller unit with a fixed roller and three feed rollers, in particular in the case of products which do not heat up significantly during grinding or in which the heat of grinding does not have a negative influence on the product.
  • this further stage can be e.g. as a squeeze stage of the double stage or after smooth roller passages or after the double stage as a dissolver.
  • the new invention opens up a whole series of new concepts, in particular a layout for a 6 or 5 roller mill, which can also be changed at any time. Furthermore, the new invention allows a very advantageous bearing structure and a corresponding drive concept. This enables e.g. to design the bearings with the rollers for service work as an assembled and removable roller package. The combined adjustment module is also very advantageous. Brief description of the invention
  • FIG. 1 a a 6-roll mill, partly in section and as a front view (FIG. 1 a); 2 shows the air extraction from the upper and lower grinding gap; Figures 3, 3a two variants of the overdrive; FIG. 4 shows a product guide channel from the upper to the lower grinding; FIG. 4a the sampling after the upper grinding; 4b shows an additional scraper for the guide roller; Figures 4c and 4d two configurations for the roller positions; Figures 5 - 5e different assemblies for storage and grinding roller adjustment; FIG. 6 shows a view of a roller mill with the side hood opened; 7 shows the field of the main forces in the 6-roll mill; FIG. 7a shows a pedestal with mounted bearing blocks, in a side view; FIG. 8 shows a roller mill with 4 rollers for each grinding unit; FIG. 9 shows a 5-roll mill; Figures 9, 9a and 9b a stand structure for the optional installation of different
  • FIG. 1 shows a 6-roll mill 1 with regrind feeds 2, 2 '.
  • the 6-roll mill 1 consists of two opposing halves, which is symbolized by a center line 3. Both chair halves each have a double grinding unit 4, 4 ', which is shown in FIGS. 5 - 5e and following in different versions.
  • a regrind discharge or a regrind discharge funnel 5 or 5 ' is arranged below the grinding unit 4.
  • the roller mill 1 is closed to the outside by a casing 7 against dust or product leakage.
  • a drive motor 8, 8 ' is flanged in a recess 9 directly on the roller mill I and drives the rollers of a grinding unit 4, 4' each via a belt 10.
  • the drive goes to an inner guide roller 1 1, 1 1 ', which in the example is the faster running roller, which is indicated by two directional arrows.
  • An upper feedable grinding roller 12, 12 ' forms with the fixed roller 11 a first grinding gap 13; a lower feedable grinding roller 14, 14 'results in a second grinding gap 15. Grinding gap 13 and grinding gap 15 a double meal.
  • each grinding unit is assigned its own drive motor 8 (8 '), both of which can be installed in the recess 9, in the middle area, at the bottom in the roller mill, or below the roller mill.
  • the engine inlet or -Extension can be done from below through a floor cutout 70.
  • the overdrive is shown on the far right in FIG.
  • the belt 10 driving directly from a pulley 16 of the motor shaft, a pulley 17 on the axis of the guide roller 11.
  • the design leaves it open, however, to hang the drive motors below the roller mill, correspondingly on the ceiling on which the roller mill stands, which is indicated by 8x.
  • FIG. 2 shows that the air extraction known per se or the corresponding air extraction ducts 80 can also be used with the new milling roller mill.
  • a removable side part is shown with a hatch, in the event that an entire grinding unit is assembled or disassembled as an “en bloc” roller package.
  • Air extraction has a multiple effect.
  • the simplest solution is that the product is sucked off from the regrind hopper 6 via a pneumatic conveyor (L) and fed to the classifiers. As a result, the interior of the regrind hopper 5 is placed in negative pressure (-).
  • This negative pressure (-) now ensures that the area of the product feed 6 is aspirated via the air suction channels 80, just like the two grinding gaps 13 and 15, and that the ground material is accelerated by the air flow both in the product feed channel 82 and in the product guide channel 38.
  • the air extraction in the product guide channel 38 additionally cools the ground material.
  • FIG. 3a show on a larger scale an overdrive 18 of a chair half, in one case the feedable grinding rollers being designed as faster-running rollers and in the other case the fixed roller as a faster-running roller.
  • the same reference numerals in FIG. 3a are identified by a dash.
  • a toothed V-belt 19 is preferably used for the overdrive 18. The toothed V-belt 19 is guided around a pulley 20 of the upper grinding roller 12, a pulley 21 of the lower grinding roller 14, a tensioning roller 22 and a pulley 23 of the guide roller 11.
  • the so-called differential the toothed V-belt 19 has a braking function for the adjustable, slower-running grinding rollers 12 and 14.
  • the diameter of the grinding rollers can be in the range customary for milling practice, e.g. from 200 to 600 mm.
  • the corresponding practice also applies to the size of the differential. This is done according to the usual rules of the milling technology by choosing the appropriate diameter of the pulleys and the speeds.
  • the guide rolls preferably have a diameter D of 350 to 450 mm and the feedable grinding rolls a diameter (dl, d2) of 200 to 300 mm or preferably 250 mm.
  • the pulley diameter it is also possible to implement any type of differential speed, e.g. first grinding gap slower, second grinding gap adjustment roller running faster.
  • a scraper 30 is arranged on the guide roller 11 between the two adjustable grinding rollers 12 and 14 (FIG. 4b).
  • a second scraper 31 is assigned to the upper grinding roller 12, a third and fourth scraper 32 to the lower grinding roller 14 and the guide roller 11.
  • the wipers can be suspended using the swivel arms of the feed rollers.
  • the scraper 30 and 31 additionally has a guiding function for the regrind that emerges from the grinding gap 13, for which purpose a product removal plate 32 is provided on the scraper 31.
  • An insertion plate 33 is additionally arranged so that the entry into the second grinding gap 15 is optimal.
  • the insertion plate 33 can be pressed against a spring, via a pivot point 33 ", against the guide roller 11 (marked with 33 ').
  • This allows a product sample to be removed after the first grinding stage without risk of injury to the miller, which follows It is possible to open a flap 34.
  • the sample is taken for the second in the lower hopper via a flap 36 (FIG. 1).
  • the product feed can be checked via a flap 37 in the upper part of the roller mill 4c and 4d, another important aspect is shown.
  • the throwing parabola can be used, which, according to the free ejection from the upper grinding results from the grinding speed and the initial throwing direction.
  • This not only allows the regrind to be directed as a compact product stream from the delivery of the upper discharge to the lower grinding gap, but also to accelerate it at the same time.
  • the product guide channel 38 is delimited on the one hand (outside) by the scraper 31 and the insertion plate 33 and on the other hand (inside) by the guide roller 11.
  • the guide roller generates an air flow especially with rough or corrugated rollers and has a strong entrainment effect for the regrind.
  • the product guide channel 38 is designed as the narrowest possible channel, as can be seen from FIGS. 4 to 4d. That means the distance should be as small as possible, preferably only a few centimeters.
  • the channel is also called a curved one Channel. adapted to the radius of the guide roller 1 1. trained. This ensures optimal product transfer during normal operation.
  • a fixed channel guide plate 39 can be arranged over the entire height between the upper and lower grinding rollers 12, 14, which has the corresponding channel curvature.
  • the product guide channel 38 is optimally configured, as just stated, and additionally combined with an air suction which is shown with the air suction channel 80 as shown in FIG. 2.
  • the design of the air extraction depends on the particular situation and is preferably combined with the extraction of the other critical points in the roller mill, for example.
  • FIGS. 5 and 5a represent an assembly 40 for the storage and adjustment of the grinding rollers 12 and 14.
  • 5 shows the two adjustable grinding rollers in the working or engaged position and the Fig. 5a in the disengaged position.
  • an eccentric 50 is rotated about an axis of rotation 41 by an angle d by means not shown. Due to the geometry shown, both grinding rollers can move in and out of the fixed roller 1 1 when they are engaged and disengaged, but can no longer approach the fixed roller via a grinding gap that has been set once.
  • the two grinding rollers 12 and 14 are respectively on the two roller ends in a bearing arm 42. 42 'stored.
  • each of the two grinding rollers 12 and 14 is set to a precise grinding gap with respect to the guide roller 11, whereas the engagement and disengagement takes place via the movement of the eccentric 50.
  • the joint engagement and disengagement of both grinding rollers 12 and 14 is ensured in this way regardless of the individual grinding gap setting.
  • the setting device 43 is shown again schematically on a larger scale in FIG. 5d. In order to allow the arm movement, each adjusting device 43 is anchored via a cutting edge 46 and an axis of rotation 47.
  • FIG. 5b shows a further advantageous embodiment only one overload protection, the spring 52 for the two adjustable grinding rollers with a tension anchor 51.
  • the tension anchor 51 has a pull rod 56. between articulation points 54 and. 54 'of the bearing arms 42 and 42' can be clamped.
  • a spring sleeve 3 and a locking nut 53 ' By turning a spring sleeve 3 and a locking nut 53 ', a specific position of the grinding rollers can be fixed to one another.
  • the roll installation or roll removal is also indicated.
  • the two grinding rollers 12 and 14 can after swiveling both Einteil worn (arrow outward) on the axis of the eccentric 50 according to arrow 48 and. 48 'can be moved out of or into the roller mill.
  • the guide roller 1 1 can be installed or removed via corresponding slots 49. It is also possible to extend and replace an entire bearing block with a guide roller and two positioning rollers as a unit on the inclined standing surface (FIG. 7).
  • a particularly interesting solution could be found in double grinding if the diagonal MW12, which goes from the center M ll of the guide roller 11 through the center M 12 of the upper grinding roller 12, has an angle ⁇ of less than 45 °, preferably 30 ° is up to 40 ° to a horizontal X.
  • FIG. 5c shows a further embodiment for the setting device.
  • the overload safety device or overload spring 45 is designed as a separate assembly with an adjusting screw 45 '. This is also only shown schematically.
  • the anchoring of the handwheel 44 and. the adjusting rod 57 is carried out via a firmly screwed element 58. This solution provides an additional lever transmission via a lever 59 or a corresponding eccentric for the grinding gap adjustment.
  • FIGS. 5d and 5e show a further embodiment, FIG.
  • FIG. 5e being partly a section and partly a view according to arrow V.
  • FIG. 5e indicates the anchoring of the assembly by means of two tie rods and a yoke plate 45 "to form bearing blocks 63. Furthermore, a pneumatic engagement and disengagement 55 is shown schematically.
  • FIG. 6 shows a double roller mill with the drive roof 90 opened, which is held rotatably via a hinge 91.
  • FIGS. 7 and 7a show the "force elements", ie those elements that are used by the grinding and driving forces.
  • the main forces are marked with oblique hatching with field 60.
  • Each side stand 61 consists of three elements on each end of the roller, a bridge-like base 62 and two bearing blocks 63 and 63a.
  • the entire roller mill 1 thus has a total of two bridge-like stands 62 and four bearing blocks 63 and 63a.
  • Two grinding blocks 63 and 63a are assigned to each grinding unit. It is advantageous if the two adjustable grinding rollers 12 and 14 of double grinding are arranged opposite and symmetrical with respect to a center line 64, so that there is an at least approximately uniform force distribution in the respective bearing block 63.
  • Each bearing block 63, 63a is supported a slightly inclined support surface 65.
  • the bearing blocks are secured on both support surfaces 65 or contact surfaces 66 with detachable screws.
  • Flat damping strips or damping elements 67 are attached between the bearing blocks and the support surfaces and the contact surfaces.
  • the base 62 and thus the entire roller mill 1 can also be supported via actual vibration insulation elements 68.
  • the proposed double damping reduces the noise and the disturbing vibrations particularly effectively. Both the noise to the environment and the vibration on the building are greatly reduced because all forces are now recorded via the damping.
  • the drive motors 8 are screwed on motor consoles or flanges 69 arranged on both sides.
  • the motor brackets or flanges 69 are components of the base 62 and allow a direct force connection to the bearing blocks 63, 63a.
  • the drive motors 8 can be assembled and disassembled from below. Almost without exception, large floor openings 70 are provided under the roller mills for the regrind 5, which can be used for the assembly of the drive motors (FIG. 1).
  • FIG. 8 shows a further embodiment in which each grinding unit has 4 rollers.
  • the top roller as a squeeze roller, or the bottom roller as a opening roller and are driven accordingly.
  • FIG. 9 schematically shows a further possible embodiment of the new invention in the form of a 5-roll mill.
  • the left half of the chair 100 corresponds to the statements made so far.
  • the right half of the image has a simple pair of rollers 102 with a horizontal roller position and is designed as a single grinding unit 101.
  • the rollers of the pair of rollers 102 can also be arranged diagonally.
  • the pair of rollers 102 has a fixed roller 103, a movable roller 104, and also a setting device 105 with a connecting rod with a safety package and an engagement and disengagement device 106.
  • This pair of rollers can also be designed as a so-called roller package, e.g. according to DE-PS No. 27 30 166.
  • FIGS. 9a and 9b show a further, particularly advantageous embodiment of the new roller mill.
  • a whole frame consists of two bridgehead-like side parts 1 10 resp. 1 10 ', which are connected by an upper cross member 1 1 1 and two lower cross members 1 12.
  • a double grinding unit 4 is shown on the left side of FIG. 9a, and a single grinding unit 101 is shown on the right side of the image.
  • the side parts 1 10 have two identical support surfaces 65 on both sides, to which the respective bearing blocks are screwed.
  • the formwork parts are adapted to the two grinding units.
  • the casing 1 13 is a vertical continuation above the cross member 1 12.
  • the casing 1 14 has a bulge.
  • FIG. 10 in which both the device according to the invention and the method are shown schematically.
  • the roller mill 1 is shown on the left in the picture as a complete 6-roller mill 1 with the two double grinding units 4. 4 '. Only one half 4 'of a roller mill 1 is shown on the right in FIG. This is to indicate that in particularly simple application cases, e.g. mills for the production of special products such as starch production can be a complete mill.
  • other special machines are mostly used in the milling practice, which is only marked with a pneumatic conveying line 200.
  • plan sifters or semolina cleaning machines are primarily used to separate the individual fractions, to which reference is made.
  • FIG. 13 shows the gradual extraction of the ground products.
  • the corresponding stages are designated I, II and III, the supply with Sp.
  • Each stage (I, II, III, etc.) in FIG. 10 contains a double stage or a real double meal passage and a sieve passage.
  • the illustration is an extreme simplification of an actual mill as shown in more detail in EP-PS No. 335 925, to which reference is made by way of example.
  • Part of the screen rejection is fed from stage I via a pneumatic conveyor line 201 to stage II, analogously with conveyor line 202 from stage II to stage III.
  • Part of the fractions from each stage can already be taken as a finished product from the grinding process, which is indicated by arrows 203 to 205. Another part of the fraction goes into one of the subsequent stages or can still be processed in some way to include the various components of value such as peel, endosperm, germ, flour. To obtain semolina etc. separately with the greatest possible yield of light flour or semolina. This is indicated by the arrows 206 to 208.
  • the reference symbol Gx stands for all other separation stages, as are common in miller's practice.

Abstract

La présente invention concerne un nouveau procédé de mouture ainsi qu'un nouveau moulin à cylindres de meunerie comprenant deux unités de mouture disposées côte à côte. Au moins l'une des unités de mouture comporte deux étages de mouture et présente un cylindre-guide intérieur (11) ainsi que deux cylindres extérieurs superposés pouvant être avancés vers le cylindre-guide intérieur. Au lieu du moulin classique à 8 cylindres, il est proposé un moulin à 6 cylindres ou à 5 cylindres. Le socle du moulin à cylindres est conçu en forme de pont, de sorte que le moteur d'entraînement (8) peut être monté à l'intérieur du socle ou fixé à ce dernier. De par la formation de blocs de support ou de 'paquets de 3 cylindres', on obtient avec le nouveau type de moulin à cylindres un amortissement des vibrations et du bruit, grâce à des éléments amortisseurs intégrés. Le nouveau moulin à cylindres a pratiquement la même hauteur que le moulin classique à 4 cylindres.
PCT/CH1996/000146 1995-04-24 1996-04-23 Procede de mouture et moulin a cylindres pour la mouture d'aliments destines a la consommation humaine ou animale WO1996033808A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995114955 DE19514955C2 (de) 1995-04-24 1995-04-24 Walzenstuhl für die Vermahlung von Nahrungs- und Futtermittel
DE19514955.6 1995-04-24

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WO1996033808A1 true WO1996033808A1 (fr) 1996-10-31

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