MXPA00004027A - Extrusion die for expanded cereals - Google Patents

Abstract

Expanded cereal with the overall shape of an array of touching balls, and die for obtaining such a cereal by cooking-extrusion, the die comprising a feed ring (1) opening onto a cylindrical distribution chamber (2) communicating with an array of parallel extrusion tubes (3) provided in a front wall (4), a cylindrical distribution insert (5) extending axially from the centre of the ring (1) as far as a predetermined distance from the array of tubes (3).

Description

EXTRUSION NOZZLE DESCRIPTION OF THE INVENTION E.l. The subject of the present invention is an extrusion nozzle, an extruder comprising at least one nozzle, an expanded cereal that can be obtained by extrusion through the nozzle, and a method for manufacturing the census. EP 0,898,890 (SOCIETE DES. PRODUITS NESTLE S.A.) discloses an extrusion nozzle for producing, extruding a single substance, a product having the. Generally, a core surrounded by a ring, the nozzle comprises a plate with feed hole that opens on a distribution chamber that communicates, on the one hand, with a central extrusion duct with the general shape of a cone convergent , via a plate of QJGi c D central circular for pre-expansion and / or to moderate, and communicating ,. on the other hand, with at least one tubular extrusion duct coaxial with the general shape of a converging cone, via at least one annular orifice plate for pre-expansion and / or moderation, the coaxial central and tubular extrusion ducts have holes - concentric central and annular e-sts. US 2,858,218 (JO BENSON) describes a cereal in the form of flakes having a relief comparable to the surface of a raspberry, and a method to obtain the cereal, in the method a mixture of cereal and water is cooked at atmospheric pressure, the cooked pasta thus obtained is exx.txxLi.da, driving it with a piston through a nozzle having a number of orifices, to form parallel filaments of cooked pasta, the fuels combined in a bundle and tablets latexally in an extension tubular nozzle, -. When they adhere to one another, the cylinder thus obtained is dried and cut into thin slices, and the slices are caused to sponge under the action of heat. JIS 3,4.82 ^ .992 XJ. O. BENSON) describes a cereal in the form of flakes composed of pieces that are touched, the line in ... where the pieces are colored, and a method to obtain the cereal, in the method a mixture of cereal and water is cooked in a cooking device, the cooked pasta is extruded through a nozzle having a number of circular exit holes, particularly six holes arranged in a circle around a central hole, and a dye is injected through -ox fc small intermediates, to form parallel strands of cooked pasta, which are colored in their interface, the strands are combined in a bundle and compressed 1 a_t.e feed .. in_ a tubular extension of the nozzle, so that When the others are dialed, the diameter of the composite, thus obtained, is reduced by stretching it longitudinally, the composite strand is broken. txan-svexsalmente. in thin slices, the slices so ?. - dry and then -proclaim "feet." sponge under the action of heat. The object of the present invention is. proposing an extrusion nozzle which makes it possible to produce an expanded cereal with a particularly attractive form, ie, the general shape of an arrangement of spheres which are touched. J_Lax-a esi.e_ end, -. the extrusion nozzle according to the present. Invention 1 includes a power supply unit that opens onto a cylindrical distribution chamber that communicates with an arrangement-of parallel extrusion tubes provided in a front-row. cylindrical, which extends, axially from the center of the ring, as far as a predetermined distance from the arrangement of tubes. The present invention comprises an elongated cylinder containing one or two processing screws, at least one extrusion nozzle, and means of. cut. The expanded cereal that can be obtained by extrusion through the nozzle has the general form of a provision of roasting toasts. The present method of manufacturing an expanded cereal with the general form of an arrangement of spheres that are touched, according to the present invention, in coexx-extxuir-expanding a mixture that compose-, in parts by weight, 60-90 parts of fecund material, has to 15 parts of sugar, up to 10 _parts of oil and. water added until the mixture has a content of water of 15-25% by weight, in order to make the ex-tx_usion a. through at least one nozzle comprising a plurality of parallel extrusion tubes to obtain a bundle of strands of expanded thermoplastic substance adhering to each other, and in cutting the bundle into slices in the openings. Exit of the extrusion tubes. In this description, it is to be understood that the term "processing screw" means the screw or screws of the extruder rotated within an inner diameter, or dps internal diameters of drying in the cylinder, and to which processing members such as xasters are attached. spirally wound around their axes. The configuration, spacing, depth and direction of rotation of such dredges can be configured in various ways along the axes, to define areas for various processing operations such as conduction, wetting, mixing, shear, compression / or cooking, for example. l2Jl. It is .foxnillos can be made as a single piece, or assembling elementas. slip-two in -sucession sabxe ain spindle, for example. The present extrusion nozzle therefore comprises a feed ring, which opens onto a cylindrical distillation chamber which communicates with an arrangement of parallel extrusion tubes provided in a front wall, with a cylindrical distribution insert which it extends axially from the center of the ring as far as a predetermined distance - from the. pipe layout. The feeding ring can be produced in the fora - from two concentric rings connected by radicles to the stratum, or juxtaposed tubular pairs, for example. - The distribution insert may have a first cylindrical part upstream, and a second part, toconical, downstream, eg. It is proposed to equalize the displacement velocity of a stream of thermoplastic substance __a -ex extruded to txavAs of the full width of an extrusion front corresponding to the width or diameter of the arrangement of parallel extrusion tubes. Tubing arrangement tubes can -Tenex txansversales seccions of variable form, such as circular, oval and / or polygonal, particularly triangular, square, rectangular and / or trapezoidal, for example. The tubes of one and the same arrangement can therefore have cross sections of the same or different shapes and sizes. The slide may contain 2-40 tubes, particularly .12-30 your rows, when viewed in cross section, in alignment along a number of axes or .cuves, or in no particular but relatively particular order, close to each other, for example. The diameter of the tubes may have dimensions, particularly diameters, lengths or widths of between .1 ^ 0 and .4 ^ 0 m, or in other words may have an aperture surface area of 1-. 16 mm2, for example. The distance between two tubes of the arrangement can be from 0.2-0.6 mm, for example. The extruder according to the present invention therefore comprises an elongated cylinder containing one or two processing screws, at least one extruder nozzle according to the present invention, and cutting means. The cutting means can be produced in the form of a rotary cutter with a number of blades, particularly 2-4 blades, by rotating against the outlet orifices of the tubes of the device, or in other p > . Tabs - against the front wall of the nozzle. In a preferred modality- of the extruder with several nozzles, particularly 2-30 nozzles, a downstream part of the cylinder containing a downstream end of the processing screw, or inserting screws into a central plate secured to the cylinder and in. which there is a predisposition hole that was opened and saw a p.a.c.3. of the predistribution hole, on a bell-shaped predisposition chamber.,. which - communicates with the distribution chambers of. the nozzles via the feed rings. In an embodiment of the extruder such as this with several nozzles, the number of nozzles that can be used can be adjusted according to the output of the extruder, particularly with the exception of a nozzle of two or a nozzle. of txes by plugging its feed ring with a fixed cover at its center, instead of the d i insert. attribution, pox. jemplo The expanded cereal according to the present invention, which can be obtained from the extrusion, through the present nozzle, therefore has the general form, of a dispo-sition, as-q-ue touch. the feras are touching, the disposition can be sex. of shapes, similar or different, and may, in particular, have sex and / or anad., may or may not be aligned along axes or curves, for example, the composition may have a general thickness about 4.16 mm, for example. The arrangement can be flat as a whole, or it can be somewhat curved. It may have a periphery of generally variable shape, particularly square, x c angulax-, circular or oval, modulated by the protuberances formed by 1 to spheres located at the edges, eg. It is possible to devise different modalities of the present cereal, such as breakfast cereals or crunchy food for snacks, for example. In a modality such as a cereal for breakfast, the present cereal can be consumed as such or coated, particularly with a coating of chocolate, a sugar syrup, a fruit syrup, a syrup of my l,. or a coating that contains vitamins and saponins, for example- -The present method of manufacturing, an expanded cereal with the general form of a sphere arrangement that is touched consists of cocex-extrude-expand, at a pressure from 40.76-183.4 kg / cm2 (40-180 bars) at 105-18.0 ° C, a mixture comprising, in parts per p.10, 60-90 parts of fecund material, up to 15 parts of sugar, up to 10 parts of oil and added water until the mixture has a water content. of 15-25% by weight, in carrying out the extrusion through at least one. bjaq.uilla comprising an arrangement of parallel extrusion tubes, to obtain a nebxa-S beam of expanded thermoplastic substance that adhere to each other, and cut the beam into slices in the exit holes of the sheets. extrusion tubes. The mixture can also contain up to 1.5 parts of. calcium,., in the form of calcium carbonate or calcium triphosphate ,,. example . Vitamins, trace elements and sodium chloride, for example, can be added to the mixture. Colorings, flavors or even flavoring ingredients such as cocoa can, for example, be added to it. For example, up to 6 parts of cocoa can be added. The feculate material may be a cereal flour, particularly wheat flour, barley, rice and / or corn, and / or a starch, particularly starch of txigo, ceba-da, rice, tapioca, for and / or corn, for example . Pnerle sugar - be sucrose, glucose or fructose, for example. The oil, which is generally added in the proportion of 4 parts, may be liquid butter or a vegetable oil such as palm kernel oil, for example. The ation-e-trusion can be carried out in a Russian stove with a length-to-screw ratio of about 3-24-, -can the screws rotating at 240-370 rpm, at a selected pressure of the interval of 40.76-183.4 kg / cm2 (40-180 bars) and at a selected temperature of the range, 105-180 ° C, to obtain a coefficient of expansion of about 2-4, for example, for the strings exempted. The water escapes from the thermoplastic mass in the form of vapor during the expansion, so that the S-extrudates have a porous texture and can have a residual water content of 5-12%., for example . The expanded cereal obtained can then be dried, particularly by passing it continuously through a hot air oven, until the residual water content is lowered to 1-3%, for example. The nozzle, the extruder and the cereal according to the present invention are described hereinafter with reference to the accompanying drawings, given by way of example, and in the. Figure 1 is an axial-sectional view of a nozzle embodiment, Figure 2 is a cross-sectional view of a detail of the nozzle shown in Figure 1, Figure 3 is a partial cross-sectional view. of a -jaadallity of an extruder comprising a number of nozzles,, 1 to -Figure 4 is a front view of the extruder shown in Figure 3, and Figure 5 is a photograph showing a modality of the cereal from three different angles. In the embodiment -represented in Figure 1, the extrusion nozzle comprises a feed ring 1 that opens onto a cylindrical distribution chamber 2, which communicates with a disposition of parallel extrusion tubes 3 provided in a front wall. 4, an insert 5 cylindrical ole distribution that extends axially dLesde. the center of the ring 1 as far as a certain distance pr -from the arrangement of the tubes 3. As can be seen in FIGS. 1 and 2, the distribution ring 1 is produced in the form of two rings 11 and. 12 connected by rings 13 tubular_ juxtaposed. The insert .5 of dis t r i bntion has a first part. -1 6 cylindrical upstream, and a second part 17 frus toconic, downstream. The tube arrangement 3 comprises 24 parallel cylindrical tubes. the same circular cross-section arranged in two groups with parallel axes intersecting in-angle-S- In the embodiment shown in Figures 3 and 4, the extension of the cylinder is an elongated cylinder (not shown) containing one or two processing screws (not shown) -, a number of extrusion nozzles shown in Figures 1 and 2, and cutting means 14. A coxxient part below the cylinder contains a downstream end of the processing screw or ends of the screws in a central plate 7 secured to the cylinder, and in which a hole 8 of pxedisfribuci? n is provided which is opened, via a plate 10 of the predisposing orifice on a chamber 9 of bell-shaped predistribition communicating with the chambers of distribution 2 of the nozzles via rings 1 of diatxi.bption. The cutting means are produced in the form of a rotary cutter 14 - which rotates against the exit holes of the tubes 3. As can be seen in Figure 3, a two nozzle is sealed, its feed ring is capped with a cover 15 fixed at its center instead of the insert -of distxibution 5, for example. Figure 5 represents a modality cereal xlel that can be obtained by. extrusion through a similar mouthpiece, to those -represented in Figures 1 and 4. In this modality, the cereal therefore has the general form of a distribution of spheres that are touched in the same round shape and Same dimensions, aligned in two groups with parallel axes that intersect at angles. The arrangement of spheres is slightly curved (on the side where the cutter separated the cereal from the composite strand that left the nozzle.) And has a peri-fair of generally rectangular shape. The following example illustrates the production of a preferred form of the present cereal, in this case an expanded breakfast cereal, a n-flytrnypnrin a flour-based mixture and water in an extruder-stove comprising several nozzles according to the present invention. In this example, just as in the entirety of this description, the percentages and parts are given by weight.

PJLO. One is tufa-extruder of double screw that includes several -nozzles as illustrated in Figures 3 and 4 are. used to produce expanded cereals in the form of a nna disposition of round spheres that are touched as illustrated in Figure 5. To do this, p-3 TO was a mixture with the following composition (in parts, except for the added water ): Rice flour 40 Corn flour __ 12 Wheat flour 22 Sucrose 10 Palm nut oil 5 Salt / species 3 Water added to a water content of 18%. To prepare the mixture, the dry powder was mixed with dry mix, oil and water added to the extruder, in this case a twin screw extruder GT.F.YT'R? T, type BC-72 with a Screw diameter of 88 mm and a screw length of 900 mm were then mixed. The -mix was. Then, cooked-extruded, at 170 ° C to 101.9-122.2.8 kg / cm2 (100-120 bars), with the extruder screws rotating at _310 rpm ... The mass - .., ther oplás t ica so obtained Extruded through 6 dispositions of -2? tubes, the tubes had a diameter of 1.3 mm and the distance between two tubes was 0.3 mm. The thermoplastic mass was extruded into the environmental space. and immediately cut into slices using a four-blade rotary cutter that rotated a_. 800 xpm against the front wall of the nozzles. The obtained cereal had the general form of a disposition of 24 spheres that are played with the same round shape and the same dimensions, aligned in - two groups with parallel axes that intersected at the angles. The arrangement of the spheres was slightly curved (soxixe the side, where the cutter took off the cereal from the composite strand that came out of the nozzle) and had a periphery - generally rectangular in shape. The cereal had a thick. near 6.mm, an an.ch.uxa of about 15 mm, and a length of about 20 mm.

Claims (8)

1. REFERENCES 1. Extrusion nozzle characterized in that it comprises a feed ring that is opened over a cylindrical distribution chamber communicating with an arrangement of parallel extrusion tubes provided in a front panel, a cylindrical distribution insert which is extends axially from the center of the ring as far as a predetermined distance from the pipe arrangement.
2. 2. Extrusox which comprises an elongated cylinder which contains one or two processing screws, at least one extruder nozzle according to claim 1, and cutting means.
3. 3. Extruder according to claim 2 comprising several nozzles, particularly between 2.30 nozzles, a current part of the cylinder that contains a downstream end of the processing screw, or one of screws. central plate secured to the cylinder and in which there is a predistribution orifice that opens, via a ... plate of the predistribution orifice, on a flared predistribution chamber, which communicates with the distribution chambers of the nozzles via the rings, the cutting means are produced in the form of a rotary cutter that rotates against the exit holes of the tubes.
4. 4. Expanded cereal which can be obtained by extrusion through a nozzle according to claim 1, which has the general shape of a disposition of d-spheres that are touched.
5. 5. Method of pian far.tii ra of an expanded cereal with the general form of one. disposition of touching spheres, which consists in caching-e-extruding-expanding a mixture comprising, in parts by weight, 60-90 parts of fex¡ulasx > , test 15 a sugar r.tes, up to 10 parts of oil and water added until the mixture has a water content of 15 -25% by weight, in the extrusion through at least one nozzle comprising a xlispasicion It laughs parallel extrusion tubes to obtain a bundle of strands of expanded thermoplastic substance - which adhere to one another, and to cut the bundle into slices in the exit orifices of the extrusion tubes.
6. 6. Method according to claim 5, wherein a coefficient of expansion of 2-4 is obtained for the extruded strands.
7. 7. Method according to claim 5, wherein the. Extruded strands have a porous texture.
8. 8. Method of compliance with. claim 5_ * wherein wherein the extruded strands have a residual water content of 5-12%.