CA1230005A - Process for treating a material by extrusion and an apparatus for producing a composite food product - Google Patents
Process for treating a material by extrusion and an apparatus for producing a composite food productInfo
- Publication number
- CA1230005A CA1230005A CA000485374A CA485374A CA1230005A CA 1230005 A CA1230005 A CA 1230005A CA 000485374 A CA000485374 A CA 000485374A CA 485374 A CA485374 A CA 485374A CA 1230005 A CA1230005 A CA 1230005A
- Authority
- CA
- Canada
- Prior art keywords
- extrusion
- sleeve
- fluxes
- region
- independent
- 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.)
- Expired
Links
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
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/24—Extrusion presses; Dies therefor using screws or worms
- B30B11/245—Extrusion presses; Dies therefor using screws or worms using two or more screws working in different chambers
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/40—Colouring or decolouring of foods
- A23L5/42—Addition of dyes or pigments, e.g. in combination with optical brighteners
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P30/00—Shaping or working of foodstuffs characterised by the process or apparatus
- A23P30/20—Extruding
- A23P30/25—Co-extrusion of different foodstuffs
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P30/00—Shaping or working of foodstuffs characterised by the process or apparatus
- A23P30/30—Puffing or expanding
- A23P30/32—Puffing or expanding by pressure release, e.g. explosion puffing; by vacuum treatment
- A23P30/34—Puffing or expanding by pressure release, e.g. explosion puffing; by vacuum treatment by extrusion-expansion
-
- 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
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/24—Extrusion presses; Dies therefor using screws or worms
- B30B11/243—Extrusion presses; Dies therefor using screws or worms using two or more screws working in the same chamber
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Formation And Processing Of Food Products (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
Process and apparatus for producing a food product from an extrusion machine comprising it least one screw driven in rotation inside a sleeve. The material is first of all made to pass, at the outlet of a first treatment region formed by the extrusion machine, into a second region defined by a second sleeve provided with bores dividing the material into a plurality of independent fluxes, each flux being subjected to a particular treatment. Then the independent fluxes are conveyed into a third region for forming a single product.
Process and apparatus for producing a food product from an extrusion machine comprising it least one screw driven in rotation inside a sleeve. The material is first of all made to pass, at the outlet of a first treatment region formed by the extrusion machine, into a second region defined by a second sleeve provided with bores dividing the material into a plurality of independent fluxes, each flux being subjected to a particular treatment. Then the independent fluxes are conveyed into a third region for forming a single product.
Description
~L~3~ 05 Process for treating a material by extrusion and an apparatus for producing a composite Good product BACKGROUND OF THE INVENTION
The present invention relates to an improved prGcess for treating a material by extrusion, an apparatus for carrying out the process and also products produced by the process.
Extrusion machines are employed for effecting various treatments carried out on very varied materials. For example, there may be effected in screw machines treatments for preparing and employing food nroducts, for example by a IO cooking-extrusion process GeneraIly, a screw extrusion machine comprises an elongated sleeve surrounding at least one screw driven in rotation on which treatlng means are fixedjsuch as screw-threads extending in a helix around the axis. In the vase of an extrusion machine having a plurality of screws having paxallel axes, the screws are placed within lnter-secting bores formed in the sleeve and having diameters exceeding the distance between the axes so that the mate-; rial fed through an inlet orlfice placed adjacent an ; 20 upstream end of the sleeve is driven toward the downstream end by the combined effects of the rotation of the screws.
The screwthreads may have sections with a varied pitch which permits effecting, in the direction toward the ~3~S
downs-tre~m end, various treatments such as the mixing of the cons-tituents introduced througll the inlet orifice, the kneading of -the material, the cooking in a thin layer in the case of food products; as the sleeve may be provided in certain sections with heating iackets or cooling jackets the product driven by the screws may be brougl~t to or maintained at a given temperature.
But the continuous production of a composite food product, i.e. a product comprising a plurality ox regions which are coloured and/or aromatized in a different manner, from a single material treated in an extrusion machine, poses problems in particular as concerns the injection of the various colouring and aromatizing agents, and also as concerns the formation of these different regions in a single product.
SUMMARY OF THE INVENTION
Now, investigations which have lead to the invention have shown that it was possible to obtain this type of new products having characteristics of particular interest.
According to the present invention, there is provided a process for treating a material by extrusion in a machine comprising at least one screw driven in rotation within an elongated sleeve and provided with helical threads which drive toward the downstream end ox the machine the material introduced through an inlet orifice placed adjacent to the upstream end of the sleeve, comprising causing the material to pass through the outlet of a first treatment region into a second treatment region defined by a second sleeve, dividing said material into a plurality of -independent fluxes, subjecting each flux to a particular treatment, and then conveying the independent fluxes into a third region and forming a final single product.
.
~,'~
- 3 - ~23~
The invention permits the preparation oE product in the desired manner, Eor example by a cooking-ex~rusion process, in the first -treatment region, and then the separation of the product into a plurali-ty of fluxes which are mixed with different aromas or colouring agents in the separate bores of thy second region.
But the invention also permits dividing a product previously prepared in the first treatment region into a plurality of fluxes which are subjected, for example, to different chemical reactions for achieving, for example, an expansion or a reduction of the product or for providing textures of different nature.
According to the present invention, there is also provided an apparatus for producing a composite food product by extrusion, comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream outlet orifice, a screw driven in rotation inside the elongated sleeve and provided with helical threads for driving the material introduced through the inlet orifice toward the downstream end, said apparatus further comprising a second part for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent fluxes of material, a common convergent portion, and a third part formed by an extrusion die having a central extrusion conduit of given length and section and put in communication with said separate bores through said convergent portion.
According to the present invention, there is also provided an apparatus for producing a composite food product by extrusion comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream end, at least two screws having parallel axes and each formed by a central driving shaft and helical threads disposed within said sleeve, the material being fed through - 3a - ~23~
the inlet orifice and then driven toward the downstream end of the sleeve by the rotatlon fo the screws, said apparatus further comprising a second par-t for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent Eluxes of material centered on axes of the screws, said screws being each extended inside the correspond.ing bore by a downstream portion acting as a mono-screw and provided with threads, and each of said bores of the second part opening into a third part formed by an extrusion die.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be better understood from the detailed description of several embodiments given by way of example and shown in the accompanying drawing. In the drawing:
I, .
:~L231~)0~1 f Fig. l is a diagran~atic axiaL sectional view of a first embodiment of the inventlon ;
Fig. 2 is a diagrammatic axial sectional view of a second embod1ment of the invention ;
Figs. 3 and 4 are two cross~sectional views in planes A-A and BOB of Fig. 2 ;
Figs. 5 and 6 are modifications of the construction of the extrusion die ;
Figs. 7 and 8 are cross-sectional views of two exam-ples of products pxoduced by the process according to the invention.
DESCRIPTION OF PRE:FERRED EMl~ODIMENTS
Fig. 1 shows diagrammatically an apparatus for carry-ing out the process according to the invention and formed by a machine having a plural:ity of treatment regions.
The upstream region I comprises a conventional screw extrusion machine. It therefore comprises an elongated sleeve 1 in which there is placed a screw 20 driven in rotation by a motor-speed reducer unit 3. The screw 20 is formed by a central driving shaft 21 on which a screw-thread 22 extends in the form of a helix. The pitch and the depth of the thread 22 are determined in accordance with the treatment it is desired to effect on the material introduced through a supply orifice 4 formed at the up-stream end of the sleeve and driven toward the downstreamend by the rotation of the screw 20.
.
~;~36~
Further, in a given section of the sleeve 1, the latter may be surrounded by a jacket (not shown) whereby it is possible to heat or cool and consequently bring the material to a desired temperature or regulate this temperature.
The upstream region I is followed by a second region II in which separate treatments may be carried out.
For this purpose, the sleeve 1 is extended by a second sleeve 5 in which are formed two separate bores 50 and 51 for forming two independent fluxes A and B of the material prepared in there~ion I. The sleeve 5 is provided with two orifices 52 and 53 opening onto the two bores 50 and 51 and permitting the introduction of different pro-ducts in the two fluxes of material A and B. It is also possible to place in one or hoth bores 50 and 51, a static mixer 54 for homogeneizing the corresponding flux of material. The bores 50, 51 terminate in a common conver-gent portion which terminates in a single orifice 7.
This second treatment region II is followed by a third region III formed by an extrusion die 6 provided with a central extrusion conduit 60. The latter has a length which is so determined that the fluxes A and B are applied against each other and become unitary,as will be seen hereinafter.
Owing to this arrangement, the material fed through the inlet orifice 4 i5 subjected to the required treatment in the first region I of the machine and is then divided ~,3~
into -two lndependent fluxes A and B in the second region II. This second region permits the applica-tion of diffe-rent treatments to the two fluxes coming from the same material and, in particular, the introduction through orifices 52 and 53 of colouring agents and/or different aromas or flavourings, the static mixer 54 t.hus homoge-neizing the mixture.
ThereaEter, aster the two fluxes A and B have been subjected to a different treatment, they are conveyed through the convergent portion 55 to the extrusion conduit of the extrusion die 6 where they are grouped together into a single flux. At the outlet of the die 6, the material issues at a certain pressure and is subjected to atmospheric pressure and the shock due to this sudden pressure difference brings about an exoansion of the material.
In the extrusion conduit 60, the two fluxes A and B
are maintained aPplied against each other throughout the length of said conduit so as to achieve the adhesion of these two fluxes and obtain continuously at the outlet of the die a final product having on its transversely extending end and throughout the length, two coloured and/or aromatized regions of different types as shown in Fig. 7 in which the two fluxes A and B are shown adhexed to each other.
The interconnection of the two fluxes is achieved,on one hand, owing to the symmetrical flow in the second ~3~
zone II of the fl.uxes A and B which are maintained a-t the same velocity and at the same temperature so as to retaln the same characteristics of the material and, on the other hand, owing to the length of the extr.usion conduit 60, which during a given period of time, exerts suffi-cient pressure on these two fluxes.
Fig. 2 shows a second embodiment of the invention in which the upstream region I is formed by a conventio-nal double-screw extrusion machine. It also has an elongated sleeve 1 in which are placed two screws 30 and 40 driven in rotation about their parallel axes by a motor-speed reducer unlt 3. Each screw is formed by a central driving shaft 31, 41 on which extend helical screwthreads 32 and 42 which engage with each other. The two screws may be formed by successive sections having different pitches so that it is possible to subject the material,introduced through the supply orifica 4 provided at the upstream end of the sleeve and driven toward the downstream end by the rotation of the screws,to varied treatments.
As can be seen in Fig 3, the sleeve 1 is provided with two bores la and lb of diameters equal, apart from clearance, to the diameter of thy two screws and conse-quently greater than the distance a between the axes, the two bores being therefore intersecting in a median region corresponding to the interengagement of the two screws.
. . .
- 8 3~ S
further, in a given section of the sleeve 1, the latter may be surrounded by a jacket for heating or cooling and consequently for bringing the material to a desired temperature or regulating the latter.
Depending on the contour given to the two screws, any known treatment ox the material may be carri.ed out within the section I of the machine. The upstream region I is also followed by a second region II in which s.eparate treat-ments may be carried out. The sleeve 1 is therefore exten-ded by a second sleeve 5 in which are ormed two separate bores 50 and 51 for forming two independent fluxes and B
of the material prepared in the region I. The sum of the radii of the two separate bores 50 and 51 is less than the distance a between the axes of the two screws. Conse-quently, as shown in Fig. 4, the two bores 50 and 51 do notintersect.
The two screws 30 and 40 are each extended in the corresponding bore 50, 51 by a downstream portion 33, 43 respectively, which i5 mounted in the corresponding bore 50, 51. Each screw 33, 43 is formed by a shaft, 34 and 44 respectively, on which extends a helical screwthread 35 and 45 respectively. The two shafts 34, 44 are placed in the extension of the shafts 31, 41 of the two screws 30, 40 and driven in xotation with the latter. The threads 35, 45 haze diameters which are equal, apart prom clearance, to the diameters of the bores 50 and 51, As in the foregoing embo-diment, the sleeve 5 is provided with two oriices 52 and 53 ~'~3{~
opening into the two bores 50 and 51 or introducing various additives in the two fluxes A and B of material.
Further, each bore 50~ 51 is extended by a convergent portion 56 and 57 which terminate in an orifice 8 and 9 respectively. Each screw 33, 43 is provided with a poi.nted portion which enters the corresponding convergent portion.
The treatment region II formed by the sleeve 5 is followed by a third region III formed by an extrusion die 6a. The latter comprises for each flux A and B, in front of each orifice 8, 9, a distribution passageway 61 and 62 respectively, which are symmetrical to each other and converge to a common extrusion conduit 60a.
In this embodlment employing a double screw machinel the material fed through the inlet orifice 4 is subjected to the desired treatment in the first region I and is then divided in the region II into two independent fluxes A and B driven by the screws 33, 43 which operate as a mono-screw.
This second region II permits the introduction through the orifices 52 and 53 of different colouring agents and/or aromas or flavourings, the screws 33 and 43 homogeneizing the mixture in each flux.
Thereafter, when the two fluxes;A and B have been suh-jected to a different treatment, thy are conveyed by the convergent portions 56, 57 to the distribution passageways 61, 62 and then they are re-grouped into a single flux in the extrusion conduit 60a of the extrusion die 6a. In this conduit 60a, the two fluxes A and B become unitary for the .
~;~3C)~S
previously explained reasons.
where is thus obtained from a slngle material treated in a double-screw machine, a final product comprising two differently coloured and/or aromatized regions.
Owing to the invention, it is also possible to arrange that the two mono-screws 44, 43 lead to concentric extru-sion dies (Fig. 5) which permit the production of a filled product by co-extrusion.
In this embodiment, the third region III is formed by an extrusion die 70 having, for each flux A and B, in front of each orifice 8, 9, a distribution passageway 71 and 72 respectively. Each distribution passageway 71 and 72 commu-nicates with an extrusion conduit 73 and 74, the conduit 74 being concentric with the conduit 73. The flux A is there-lS fore conveyed by the distribution passageway 71 to theconduit 73 so as to form the external material of the - product, while the flux B is conveyed by the passageway 72 to the conduit 74 for forming the filling of the product.
Thus, it can be seen that, with the use of the same starting JO material, it will be possible to produce a product, as shown in Fig. 8, having a filling and a covering which are diffe-rent as concerns their taste, their texture, or their appearance.
In order to increase the delivery or flow o the final product, the extrusion die may obviously include a plurality of extrusion conduits, as shown in Fig. 6. In this case, in respect o each flux A and B, the distribution passageways . ^ .
ox 11 and 12 of the extrusion die 10 are divlded into sub-passageways lla, llb and 12a, 12b respectively, whlch converge in pairs toward an extrusion conduit 13, 14. The path of flow of each flux A and in the passageways and the sub-passageways is symmetrical.
The machines described hereinbefore may be completed by a device for cutting the extruded products. The section of the extrusion dies may be varied for extruding products of different shapes. Further, the material issuing from the first treatment region slay be also separated into a plurality o independent fluxes which are subjected to different treatments, these fluxes being thereafter re-grouped in a single extrusion conduit so as to provide a final product having, on the transverse end and throughout the length thereof, a plurality of differently coloured and/or aromatized sectors.
Owing to the invention, it is thus possible to extrude in the same machine and from the same material a composite food product without necessity to produce the different elements thereof separately or to employ a plurality of machines.
Various modifications and improvements may be made in the process and apparatus according to the invention within the scope of the accompanying claims.
The present invention relates to an improved prGcess for treating a material by extrusion, an apparatus for carrying out the process and also products produced by the process.
Extrusion machines are employed for effecting various treatments carried out on very varied materials. For example, there may be effected in screw machines treatments for preparing and employing food nroducts, for example by a IO cooking-extrusion process GeneraIly, a screw extrusion machine comprises an elongated sleeve surrounding at least one screw driven in rotation on which treatlng means are fixedjsuch as screw-threads extending in a helix around the axis. In the vase of an extrusion machine having a plurality of screws having paxallel axes, the screws are placed within lnter-secting bores formed in the sleeve and having diameters exceeding the distance between the axes so that the mate-; rial fed through an inlet orlfice placed adjacent an ; 20 upstream end of the sleeve is driven toward the downstream end by the combined effects of the rotation of the screws.
The screwthreads may have sections with a varied pitch which permits effecting, in the direction toward the ~3~S
downs-tre~m end, various treatments such as the mixing of the cons-tituents introduced througll the inlet orifice, the kneading of -the material, the cooking in a thin layer in the case of food products; as the sleeve may be provided in certain sections with heating iackets or cooling jackets the product driven by the screws may be brougl~t to or maintained at a given temperature.
But the continuous production of a composite food product, i.e. a product comprising a plurality ox regions which are coloured and/or aromatized in a different manner, from a single material treated in an extrusion machine, poses problems in particular as concerns the injection of the various colouring and aromatizing agents, and also as concerns the formation of these different regions in a single product.
SUMMARY OF THE INVENTION
Now, investigations which have lead to the invention have shown that it was possible to obtain this type of new products having characteristics of particular interest.
According to the present invention, there is provided a process for treating a material by extrusion in a machine comprising at least one screw driven in rotation within an elongated sleeve and provided with helical threads which drive toward the downstream end ox the machine the material introduced through an inlet orifice placed adjacent to the upstream end of the sleeve, comprising causing the material to pass through the outlet of a first treatment region into a second treatment region defined by a second sleeve, dividing said material into a plurality of -independent fluxes, subjecting each flux to a particular treatment, and then conveying the independent fluxes into a third region and forming a final single product.
.
~,'~
- 3 - ~23~
The invention permits the preparation oE product in the desired manner, Eor example by a cooking-ex~rusion process, in the first -treatment region, and then the separation of the product into a plurali-ty of fluxes which are mixed with different aromas or colouring agents in the separate bores of thy second region.
But the invention also permits dividing a product previously prepared in the first treatment region into a plurality of fluxes which are subjected, for example, to different chemical reactions for achieving, for example, an expansion or a reduction of the product or for providing textures of different nature.
According to the present invention, there is also provided an apparatus for producing a composite food product by extrusion, comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream outlet orifice, a screw driven in rotation inside the elongated sleeve and provided with helical threads for driving the material introduced through the inlet orifice toward the downstream end, said apparatus further comprising a second part for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent fluxes of material, a common convergent portion, and a third part formed by an extrusion die having a central extrusion conduit of given length and section and put in communication with said separate bores through said convergent portion.
According to the present invention, there is also provided an apparatus for producing a composite food product by extrusion comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream end, at least two screws having parallel axes and each formed by a central driving shaft and helical threads disposed within said sleeve, the material being fed through - 3a - ~23~
the inlet orifice and then driven toward the downstream end of the sleeve by the rotatlon fo the screws, said apparatus further comprising a second par-t for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent Eluxes of material centered on axes of the screws, said screws being each extended inside the correspond.ing bore by a downstream portion acting as a mono-screw and provided with threads, and each of said bores of the second part opening into a third part formed by an extrusion die.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be better understood from the detailed description of several embodiments given by way of example and shown in the accompanying drawing. In the drawing:
I, .
:~L231~)0~1 f Fig. l is a diagran~atic axiaL sectional view of a first embodiment of the inventlon ;
Fig. 2 is a diagrammatic axial sectional view of a second embod1ment of the invention ;
Figs. 3 and 4 are two cross~sectional views in planes A-A and BOB of Fig. 2 ;
Figs. 5 and 6 are modifications of the construction of the extrusion die ;
Figs. 7 and 8 are cross-sectional views of two exam-ples of products pxoduced by the process according to the invention.
DESCRIPTION OF PRE:FERRED EMl~ODIMENTS
Fig. 1 shows diagrammatically an apparatus for carry-ing out the process according to the invention and formed by a machine having a plural:ity of treatment regions.
The upstream region I comprises a conventional screw extrusion machine. It therefore comprises an elongated sleeve 1 in which there is placed a screw 20 driven in rotation by a motor-speed reducer unit 3. The screw 20 is formed by a central driving shaft 21 on which a screw-thread 22 extends in the form of a helix. The pitch and the depth of the thread 22 are determined in accordance with the treatment it is desired to effect on the material introduced through a supply orifice 4 formed at the up-stream end of the sleeve and driven toward the downstreamend by the rotation of the screw 20.
.
~;~36~
Further, in a given section of the sleeve 1, the latter may be surrounded by a jacket (not shown) whereby it is possible to heat or cool and consequently bring the material to a desired temperature or regulate this temperature.
The upstream region I is followed by a second region II in which separate treatments may be carried out.
For this purpose, the sleeve 1 is extended by a second sleeve 5 in which are formed two separate bores 50 and 51 for forming two independent fluxes A and B of the material prepared in there~ion I. The sleeve 5 is provided with two orifices 52 and 53 opening onto the two bores 50 and 51 and permitting the introduction of different pro-ducts in the two fluxes of material A and B. It is also possible to place in one or hoth bores 50 and 51, a static mixer 54 for homogeneizing the corresponding flux of material. The bores 50, 51 terminate in a common conver-gent portion which terminates in a single orifice 7.
This second treatment region II is followed by a third region III formed by an extrusion die 6 provided with a central extrusion conduit 60. The latter has a length which is so determined that the fluxes A and B are applied against each other and become unitary,as will be seen hereinafter.
Owing to this arrangement, the material fed through the inlet orifice 4 i5 subjected to the required treatment in the first region I of the machine and is then divided ~,3~
into -two lndependent fluxes A and B in the second region II. This second region permits the applica-tion of diffe-rent treatments to the two fluxes coming from the same material and, in particular, the introduction through orifices 52 and 53 of colouring agents and/or different aromas or flavourings, the static mixer 54 t.hus homoge-neizing the mixture.
ThereaEter, aster the two fluxes A and B have been subjected to a different treatment, they are conveyed through the convergent portion 55 to the extrusion conduit of the extrusion die 6 where they are grouped together into a single flux. At the outlet of the die 6, the material issues at a certain pressure and is subjected to atmospheric pressure and the shock due to this sudden pressure difference brings about an exoansion of the material.
In the extrusion conduit 60, the two fluxes A and B
are maintained aPplied against each other throughout the length of said conduit so as to achieve the adhesion of these two fluxes and obtain continuously at the outlet of the die a final product having on its transversely extending end and throughout the length, two coloured and/or aromatized regions of different types as shown in Fig. 7 in which the two fluxes A and B are shown adhexed to each other.
The interconnection of the two fluxes is achieved,on one hand, owing to the symmetrical flow in the second ~3~
zone II of the fl.uxes A and B which are maintained a-t the same velocity and at the same temperature so as to retaln the same characteristics of the material and, on the other hand, owing to the length of the extr.usion conduit 60, which during a given period of time, exerts suffi-cient pressure on these two fluxes.
Fig. 2 shows a second embodiment of the invention in which the upstream region I is formed by a conventio-nal double-screw extrusion machine. It also has an elongated sleeve 1 in which are placed two screws 30 and 40 driven in rotation about their parallel axes by a motor-speed reducer unlt 3. Each screw is formed by a central driving shaft 31, 41 on which extend helical screwthreads 32 and 42 which engage with each other. The two screws may be formed by successive sections having different pitches so that it is possible to subject the material,introduced through the supply orifica 4 provided at the upstream end of the sleeve and driven toward the downstream end by the rotation of the screws,to varied treatments.
As can be seen in Fig 3, the sleeve 1 is provided with two bores la and lb of diameters equal, apart from clearance, to the diameter of thy two screws and conse-quently greater than the distance a between the axes, the two bores being therefore intersecting in a median region corresponding to the interengagement of the two screws.
. . .
- 8 3~ S
further, in a given section of the sleeve 1, the latter may be surrounded by a jacket for heating or cooling and consequently for bringing the material to a desired temperature or regulating the latter.
Depending on the contour given to the two screws, any known treatment ox the material may be carri.ed out within the section I of the machine. The upstream region I is also followed by a second region II in which s.eparate treat-ments may be carried out. The sleeve 1 is therefore exten-ded by a second sleeve 5 in which are ormed two separate bores 50 and 51 for forming two independent fluxes and B
of the material prepared in the region I. The sum of the radii of the two separate bores 50 and 51 is less than the distance a between the axes of the two screws. Conse-quently, as shown in Fig. 4, the two bores 50 and 51 do notintersect.
The two screws 30 and 40 are each extended in the corresponding bore 50, 51 by a downstream portion 33, 43 respectively, which i5 mounted in the corresponding bore 50, 51. Each screw 33, 43 is formed by a shaft, 34 and 44 respectively, on which extends a helical screwthread 35 and 45 respectively. The two shafts 34, 44 are placed in the extension of the shafts 31, 41 of the two screws 30, 40 and driven in xotation with the latter. The threads 35, 45 haze diameters which are equal, apart prom clearance, to the diameters of the bores 50 and 51, As in the foregoing embo-diment, the sleeve 5 is provided with two oriices 52 and 53 ~'~3{~
opening into the two bores 50 and 51 or introducing various additives in the two fluxes A and B of material.
Further, each bore 50~ 51 is extended by a convergent portion 56 and 57 which terminate in an orifice 8 and 9 respectively. Each screw 33, 43 is provided with a poi.nted portion which enters the corresponding convergent portion.
The treatment region II formed by the sleeve 5 is followed by a third region III formed by an extrusion die 6a. The latter comprises for each flux A and B, in front of each orifice 8, 9, a distribution passageway 61 and 62 respectively, which are symmetrical to each other and converge to a common extrusion conduit 60a.
In this embodlment employing a double screw machinel the material fed through the inlet orifice 4 is subjected to the desired treatment in the first region I and is then divided in the region II into two independent fluxes A and B driven by the screws 33, 43 which operate as a mono-screw.
This second region II permits the introduction through the orifices 52 and 53 of different colouring agents and/or aromas or flavourings, the screws 33 and 43 homogeneizing the mixture in each flux.
Thereafter, when the two fluxes;A and B have been suh-jected to a different treatment, thy are conveyed by the convergent portions 56, 57 to the distribution passageways 61, 62 and then they are re-grouped into a single flux in the extrusion conduit 60a of the extrusion die 6a. In this conduit 60a, the two fluxes A and B become unitary for the .
~;~3C)~S
previously explained reasons.
where is thus obtained from a slngle material treated in a double-screw machine, a final product comprising two differently coloured and/or aromatized regions.
Owing to the invention, it is also possible to arrange that the two mono-screws 44, 43 lead to concentric extru-sion dies (Fig. 5) which permit the production of a filled product by co-extrusion.
In this embodiment, the third region III is formed by an extrusion die 70 having, for each flux A and B, in front of each orifice 8, 9, a distribution passageway 71 and 72 respectively. Each distribution passageway 71 and 72 commu-nicates with an extrusion conduit 73 and 74, the conduit 74 being concentric with the conduit 73. The flux A is there-lS fore conveyed by the distribution passageway 71 to theconduit 73 so as to form the external material of the - product, while the flux B is conveyed by the passageway 72 to the conduit 74 for forming the filling of the product.
Thus, it can be seen that, with the use of the same starting JO material, it will be possible to produce a product, as shown in Fig. 8, having a filling and a covering which are diffe-rent as concerns their taste, their texture, or their appearance.
In order to increase the delivery or flow o the final product, the extrusion die may obviously include a plurality of extrusion conduits, as shown in Fig. 6. In this case, in respect o each flux A and B, the distribution passageways . ^ .
ox 11 and 12 of the extrusion die 10 are divlded into sub-passageways lla, llb and 12a, 12b respectively, whlch converge in pairs toward an extrusion conduit 13, 14. The path of flow of each flux A and in the passageways and the sub-passageways is symmetrical.
The machines described hereinbefore may be completed by a device for cutting the extruded products. The section of the extrusion dies may be varied for extruding products of different shapes. Further, the material issuing from the first treatment region slay be also separated into a plurality o independent fluxes which are subjected to different treatments, these fluxes being thereafter re-grouped in a single extrusion conduit so as to provide a final product having, on the transverse end and throughout the length thereof, a plurality of differently coloured and/or aromatized sectors.
Owing to the invention, it is thus possible to extrude in the same machine and from the same material a composite food product without necessity to produce the different elements thereof separately or to employ a plurality of machines.
Various modifications and improvements may be made in the process and apparatus according to the invention within the scope of the accompanying claims.
Claims (15)
1. A process for treating a material by extrusion in a machine comprising at least one screw driven in rotation within an elongated sleeve and provided with helical threads which drive toward the downstream end of the machine the material introduced through an inlet orifice placed adjacent to the upstream end of the sleeve, comprising causing the material to pass through the outlet of a first treatment region into a second treatment region defined by a second sleeve, dividing said material into a plurality of independent fluxes, subjecting each flux to a particular treatment, and then conveying the independent fluxes into a third region and forming a final single product.
2. A process according to claim 1, comprising mixing the independent fluxes of the material which was prepared in said first treatment region with different colouring agents in said second region.
3. A process according to claim 1, comprising mixing the independent fluxes of the material which was prepared in the said first treatment region with different aromas in said second region.
4. A process according to claim 1, further comprising re-grouping the independent fluxes of material in said third region into a single flux in an extrusion die comprising at least one extrusion conduit, the conditions of extrusion being so determined that the independent fluxes are applied against each other and made unitary in said extrusion conduit.
5. A process according to claim 4, wherein the extrusion conduit of the extrusion die exerts sufficient pressure on the flux of material during a given period and on a given length so that the independent fluxes adhere to each other and form a single product before expansion.
6. A process according to claim 1, comprising causing the independent fluxes of material to pass in said third region into an extrusion die comprising two concentric conduits for producing a filled product by co-extrusion.
7. A process according to claim 1 for producing a food product, wherein the food product comprises, on a transversely extending end face and along a length thereof a plurality of differently coloured regions.
8. A process according to claim 1 for producing a food product, wherein the food product comprises, on a transversely extending end face and along a length thereof, a plurality of differently aromatized regions.
9. An apparatus for producing a composite food product by extrusion, comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream outlet orifice, a screw driven in rotation inside the elongated sleeve and provided with helical threads for driving the material introduced through the inlet orifice toward the downstream end, said apparatus further comprising a second part for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent fluxing of material, a common convergent portion, and a third part formed by an extrusion die having a central extrusion conduit of given length and section and put in communication with said separate bores through said convergent portion.
10. An apparatus for producing a composite food product by extrusion comprising a machine including an elongated sleeve having an upstream inlet orifice and a downstream end, at least two screws having parallel axes and each formed by a central driving shaft and helical threads disposed within said sleeve, the material being fed through the inlet orifice and then driven toward the downstream end of the sleeve by the rotation of the screws, said apparatus further comprising a second part for treating the material and comprising a second sleeve defining separate bores for forming a plurality of independent fluxes of material centered on axes of the screws, said screws being each extended inside the corresponding bore by a downstream portion acting as a mono-screw and provided with threads, and each of said bores of the second part opening into a third part formed by an extrusion die.
11. An apparatus according to claim 9, wherein the separate bores are provided with orifices for the introduction of different colouring agents and/or aromas in the fluxes of material.
12. An apparatus according to claim 10, wherein the separate bores are provided with orifices for the introduction of different colouring agents and/or aromas in the fluxes of material.
13. An apparatus according to claim 10, wherein each of the separate bores of the second part open into the extrusion die of the third part through a convergent portion.
14. An apparatus according to claim 10, wherein the extrusion die of the third part is provided with symmetrical distribution passageways, each of which is placed in front of one of the convergent portions which converge toward a common extrusion conduit of given length and section.
15. An apparatus according to claim 14, wherein the distribution passageways are divided into distribution sub-passageways which are convergent in pairs toward an extrusion conduit.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8410120A FR2566700B1 (en) | 1984-06-27 | 1984-06-27 | PROCESS FOR TREATING MATERIAL BY EXTRUSION AND MULTIPLE SCREW MACHINE FOR CARRYING OUT SAID METHOD |
| FR84-10120 | 1984-06-27 | ||
| FR84-17080 | 1984-11-09 | ||
| FR8417080A FR2572898A1 (en) | 1984-11-09 | 1984-11-09 | Method and installation for manufacturing a composite food product by extrusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1230005A true CA1230005A (en) | 1987-12-08 |
Family
ID=26224037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000485374A Expired CA1230005A (en) | 1984-06-27 | 1985-06-26 | Process for treating a material by extrusion and an apparatus for producing a composite food product |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0169126A1 (en) |
| JP (1) | JPS6121080A (en) |
| CA (1) | CA1230005A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486049A (en) * | 1994-01-28 | 1996-01-23 | Nestec S.A. | Apparati for mixing fluid substances |
| US5718926A (en) * | 1995-06-22 | 1998-02-17 | Nestec S.A. | Die for forming extrudate having two visible longitudinal components |
| US5776534A (en) * | 1996-04-03 | 1998-07-07 | General Mills, Inc. | Food apparatus for forming multiple colored extrudates and method of preparation |
| US5919509A (en) * | 1997-05-01 | 1999-07-06 | General Mills, Inc. | Method and apparatus for producing multiple food extrudates |
| US6296465B1 (en) | 1997-08-31 | 2001-10-02 | Nestec S.A. | Extrusion die assembly for obtaining differently shaped products |
| US6854970B2 (en) | 2001-10-29 | 2005-02-15 | Frito-Lay North America, Inc. | Extruder die injection nozzle |
| US7252847B2 (en) | 2001-10-29 | 2007-08-07 | Frito-Lay North America, Inc. | Flavored extruded food product |
| US7585532B2 (en) | 2001-10-29 | 2009-09-08 | Frito-Lay North America, Inc. | Apparatus and method for improving the dimensional quality of extruded food products having complex shapes |
| US7648352B2 (en) | 2001-10-29 | 2010-01-19 | Frito-Lay North America, Inc. | Apparatus for imprinting lines on direct-expanded food products having complex shapes with improved dimensional quality |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2615143B1 (en) * | 1987-05-12 | 1989-08-18 | Togum Sa | TWO-WAY, TWO-COLOR MIXED EXTRUSION GROUP FOR PASTA PRODUCTS, ESPECIALLY CONFECTIONERY |
| JPH0661249B2 (en) * | 1990-11-27 | 1994-08-17 | 雪印乳業株式会社 | Method and apparatus for producing two-layer food in which inner material is covered with outer skin |
| DE69711591T2 (en) * | 1997-01-22 | 2002-08-08 | Nestle Sa | Process for the production of moisture-containing, lumpy goods and device for carrying them out |
| US7736686B2 (en) * | 2000-11-08 | 2010-06-15 | Nestec S.A. | Meat emulsion products and methods of making same |
| JP2016518111A (en) | 2013-03-15 | 2016-06-23 | マース インコーポレーテッドＭａｒｓ Ｉｎｃｏｒｐｏｒａｔｅｄ | Extruder system and method |
| JP6200670B2 (en) * | 2013-03-27 | 2017-09-20 | 大和製罐株式会社 | Reshaped food manufacturing apparatus and reshaped food manufacturing method |
| WO2016097781A1 (en) | 2014-12-19 | 2016-06-23 | Andritz Feed & Biofuel A/S | Multi colour die and method of colouring extruded product |
| CN109278338A (en) * | 2018-11-23 | 2019-01-29 | 吴琦隆 | A kind of Multifunctional new energy fuel producing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR847554A (en) * | 1937-12-16 | 1939-10-12 | Device for the production by extrusion of rods, tubes, blanks, etc., of plastics of various colors | |
| US2856868A (en) * | 1956-09-14 | 1958-10-21 | Kenneth K Kennedy | Method and apparatus for kneading and twisting bread dough |
| US3143767A (en) * | 1961-07-06 | 1964-08-11 | Krauss Maffei Ag | Multiple screw mixing and extrusion apparatus |
| US3482992A (en) * | 1965-02-01 | 1969-12-09 | Gen Mills Inc | Process for producing a cereal food product |
| US3876743A (en) * | 1971-09-03 | 1975-04-08 | Kellog Co | Process for producing overlaid extrudates |
| US3947200A (en) * | 1974-09-17 | 1976-03-30 | Colgate-Palmolive Company | Apparatus for producing striated soap bars |
| GB2005587B (en) * | 1977-09-26 | 1982-08-11 | Unilever Ltd | Manufacture of detergent bars |
| DE3021578A1 (en) * | 1980-06-07 | 1981-12-24 | Weisert Loser & Sohn GmbH & Co, 7500 Karlsruhe | Multi-screw extruder press - with screws revolving in cylindrical sleeves following common charging zone |
-
1985
- 1985-06-25 EP EP85401287A patent/EP0169126A1/en not_active Withdrawn
- 1985-06-26 CA CA000485374A patent/CA1230005A/en not_active Expired
- 1985-06-27 JP JP60141450A patent/JPS6121080A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486049A (en) * | 1994-01-28 | 1996-01-23 | Nestec S.A. | Apparati for mixing fluid substances |
| US5538748A (en) * | 1994-01-28 | 1996-07-23 | Nestec S.A. | Process for mixing fluid materials |
| US5718926A (en) * | 1995-06-22 | 1998-02-17 | Nestec S.A. | Die for forming extrudate having two visible longitudinal components |
| US5776534A (en) * | 1996-04-03 | 1998-07-07 | General Mills, Inc. | Food apparatus for forming multiple colored extrudates and method of preparation |
| US5919509A (en) * | 1997-05-01 | 1999-07-06 | General Mills, Inc. | Method and apparatus for producing multiple food extrudates |
| US6296465B1 (en) | 1997-08-31 | 2001-10-02 | Nestec S.A. | Extrusion die assembly for obtaining differently shaped products |
| US6854970B2 (en) | 2001-10-29 | 2005-02-15 | Frito-Lay North America, Inc. | Extruder die injection nozzle |
| US7252847B2 (en) | 2001-10-29 | 2007-08-07 | Frito-Lay North America, Inc. | Flavored extruded food product |
| US7585532B2 (en) | 2001-10-29 | 2009-09-08 | Frito-Lay North America, Inc. | Apparatus and method for improving the dimensional quality of extruded food products having complex shapes |
| US7648352B2 (en) | 2001-10-29 | 2010-01-19 | Frito-Lay North America, Inc. | Apparatus for imprinting lines on direct-expanded food products having complex shapes with improved dimensional quality |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0169126A1 (en) | 1986-01-22 |
| JPS6121080A (en) | 1986-01-29 |
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