EP0579463A1 - Dispositif et procédé de mélange de produits alimentaires contenant des morceaux solides - Google Patents

Dispositif et procédé de mélange de produits alimentaires contenant des morceaux solides Download PDF

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Publication number
EP0579463A1
EP0579463A1 EP93305410A EP93305410A EP0579463A1 EP 0579463 A1 EP0579463 A1 EP 0579463A1 EP 93305410 A EP93305410 A EP 93305410A EP 93305410 A EP93305410 A EP 93305410A EP 0579463 A1 EP0579463 A1 EP 0579463A1
Authority
EP
European Patent Office
Prior art keywords
impellers
mixer
fluid
solids
foodstuff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93305410A
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German (de)
English (en)
Inventor
Tatsuo Tanaka
Yoshito Shibauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Snow Brand Milk Products Co Ltd
Original Assignee
Snow Brand Milk Products Co Ltd
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 Snow Brand Milk Products Co Ltd filed Critical Snow Brand Milk Products Co Ltd
Publication of EP0579463A1 publication Critical patent/EP0579463A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis

Definitions

  • the present invention relates to method and apparatus for mixing solid containing foodstuff without injuring the solids contained therein in a process for filling such foodstuff and more particularly in a continuous in-line process through pipe line or the like for dosing and filling such foodstuff.
  • a mixing effect largely depends on dimensions such as diameter. depth and circumferential shape (e.g., circular, elliptical, etc.) of the container within which a desired operation of mixing is performed.
  • dimensions such as diameter. depth and circumferential shape (e.g., circular, elliptical, etc.) of the container within which a desired operation of mixing is performed.
  • a glass-shaped container is most convenient for mixing and, the more complicated the container's shape is, the more difficult the operation of mixing is.
  • corners of this container prevent the content within the pouch from being uniformly mixed and for pillow-type package it is difficult to insert a mixer into this container.
  • the invention generally resides in a method for mixing solid containing foodstuff, said method comprising steps of separately dosing a fluid of high solid content and a fluid of low solid content, mixing these fluids with each other, and filling a container with the mixture, wherein the solid containing foodstuff is mixed together prior to the filling step substantially only in a direction transverse to the direction of material conveyance.
  • the invention also resides in a mixer for mixing solid containing foodstuff in the course of material conveyance prior to a step of filling, said mixer comprising inlets through a fluid of high solid content and a fluid free from solids or of low solid content are fed respectively, an outlet through which the mixed food-stuff is discharged, and impellers adapted to be rotated and/or reciprocated by drive means substantially only in a direction transverse to the direction of material conveyance.
  • the impellers extend from immediately below the fluid inlets to immediately above the fluid outlet or at least partially cut off so as to clear said fluid inlets and outlet.
  • control means functioning to stop the impellers synchronously as the foodstuff begins to enter the mixer.
  • the impellers are arranged so as to define spaces between outer peripheries of the impellers and the mixer's inner wall and/or between the impellers and a rotary shaft thereof.
  • the inventors conducted a series of experiments in which the materials were mixed together under various conditions and found that shocks exerted by the impellers on the solids can be alleviated by feeding the solids to the impellers being at a standstill and allowing rotation of the impellers afterwards.
  • operation of filling and conveyance of the containers are alternated in the filling equipment of prior art and accordingly the fluid is intermittently conveyed.
  • the inventors found it preferable for the fragile solids preferred to rotate the impellers intermittently so that the solids are subjected to a mixing effect of the impellers while conveyance of the fluid is stopped. It is also contemplated that a complicated control may be employed to change the r.p.m. of the impellers immediately before conveyance of the fluid is stopped and thereby to reduce the shocks exerted by the impellers on the solids.
  • the inventors modified configuration of the impellers as shown by Figs. 6 through 8 so as to reduce shocks exerted by the impellers on the solids as they are fed into or discharged from the mixer and found that the desired mixing effect can be achieved without significantly injuring the solids even when the solids are fed into or discharged from the mixer while the impellers are continuously rotated.
  • Such modification of the impeller's configuration is based on the discovery that the solids are injured substantially at the moment when they enter or leave the mixer. It is necessary for the fluid to have a viscosity of 100 cp or higher. With the viscosity lower than this limit, the solids will no more behave together with the fluid.
  • the present invention provides an effect as will be described below.
  • unevenness of the solid content ratio in the unit product container can be effectively reduced by the unique method comprising the steps of separately dosing the fluid of higher solid content ratio and the fluid free from solids or of low solid content ratio, and then mixing them together substantially only in a direction transverse to the direction of in-line material conveyance to the filling step. Accordingly, the number of solids contained in respective dosed shots are successively conveyed without loss of dosing accuracy. Each unit quantity provided by each dosing shot is mixed then with each unit quantity of base mix provided by the simultaneous dosing shot and thereby the accuracy in the number of solids to be introduced into the final product is assured.
  • Figs. 1 through 3 show an embodiment of the invention, comprising impellers 33, 33, 36, 36 arranged around a rotary shaft so as to define a cruciform cross-section with the impellers 36, 36 being spaced from the rotary shaft 32, of these figures:
  • the present invention principally resides in a mixing process carried on transversely of a material conveying direction in a production line extending from a step of dosing to a step of filling foodstuff which contains solid foodstuff or the other solids.
  • FIG. 24 A first embodiment of manufacturing process using the mixer of the invention is schematically illustrated by Fig. 24.
  • This embodiment is an example of the process for manufacturing fruit containing yogurt and strawberry is used here as a fruit to be mixed with yogurt.
  • Yogurt base mix 13 is fed from a tank 11 into a yogurt base mix dosing apparatus 16a which then doses yogurt base mix at a flow rate of 100 g/sec into a mixer 17 via a pipe 21a and simultaneously strawberry preserve 14 is fed from a tank 12 into a preserve dosing apparatus 16 which then doses preserve at a flow rate of 50 g/sec into the mixer 17 via a pipe 21.
  • the mixer 17 has a volume sufficient to fill approximately three containers with product and each unit quantity of product having been mixed in this mixer 17 is discharged via a discharge pipe 22 into a container 18.
  • the container 18 is transferred by transfer means 23 by conveyer belt 19 to the subsequent process one second after completion of filling and a next container 18 is transferred to a position immediately below the discharge pipe 22.
  • the mixer 17 operates at a timing associated with transfer of the container 18 under control of device control means 20 for impellers (not shown).
  • Fig. 25 illustrates the second embodiment of manufacturing process using the mixer of the invention.
  • yogurt base mix and preserve are separately dosed before being fed into the mixer.
  • This embodiment employs a pre-mixer 24 used to mix the materials before they are fed into the mixer 17.
  • the pre-mixer 24 may be arranged, for example, so that the yogurt base mix is fed into the pre-mixer 24 through a nozzle and thereby a mixing effect is provided by a jet stream of yogurt base mix. Provision of such pre-mixer makes it possible to alleviate a burden of the mixer 17.
  • Such pre-mixing can be achieved, in addition to said jet stream of yogurt base mix, by utilizing a stream contracting effect, turbulence due to orifice or the like.
  • Figs. 24 and 25 rely on a single primary dosing step. However, a two-stage dosing mode may be adopted, i.e., primary and secondary dosing steps may be provided before final mixing.
  • Fig. 26 illustrates a third embodiment of manufacturing process using the mixer of the invention, in which the strawberry preserve 14 is fed from the tank 12 into the primary dosing apparatus 16 which then doses the preserve 14 into the mixer 17 while the yogurt base mix 13 is fed from the tank 11 directly into the mixer 17, and the materials thus mixed with each other are then fed into a secondary dosing apparatus 16b which then doses them into the container 18 via the discharge pipe 22.
  • Fig. 27 illustrates a fourth embodiment of manufacturing process using the inventive mixer, in which the strawberry preserve 14 is fed from the tank 12 into the primary preserve dosing apparatus 16 and then into a secondary dosing apparatus 16c into which the yogurt base mix 13 is directly fed from the tank 11, and said secondary dosing apparatus 16c doses the materials into the mixer 17 which discharges the mixed materials into the container 18 via the discharge pipe 22.
  • the mixer 17 is of the type adapted to be used exclusively for processing the solid containing foodstuff.
  • an inlet 21 is connected to a supply source that intermittently feeds a predetermined quantity of fluid having high solid content ratio
  • another inlet 21a is connected to a supply source that intermittently feeds a predetermined quantity of fluid being free from solids or having low solid content ratio.
  • a single inlet in the embodiment of Fig. 27 because those fluids of two types are fed into the mixer 17 after they have been mixed together in a dosing apparatus 16c. It is not critical to provide paired and/or opposed inlets.
  • the drive means may be an electric motor, a rotary actuator or the like. Furthermore, a servo motor or a motor provided with clutch brake may be employed to facilitate r.p.m. or rotational direction of the impellers to be changed or reversed, respectively.
  • a rotary shaft 32 is longitudinally provided with impellers 33, 33, 36, 36.
  • These impellers 33, 33. 36, 36 arranged so as to define a cruciform cross-section as seen in Fig. 3 are supported at longitudinally opposite ends by upper and lower supporting rods 34, 35 radially extending from longitudinally opposite ends of the rotary shaft 32.
  • the impellers 36, 36 are spaced from the rotary shaft 32.
  • the impellers 33, 36 have their upper ends located above both the inlet 21 for solid containing fluid and the inlet 21a for base fluid.
  • Solids may be fed onto the impellers being at a standstill and then impellers may be rotated to protect the solids against injuries.
  • the impellers may be intermittently rotated and the solid containing fluid and the base fluid may be fed into the mixer while the impellers are at a standstill to avoid injuries of the solids.
  • the impellers have their lower ends located above an outlet 22 so as to discharge the solids without being caught by the impellers.
  • Fig. 4 and 5 show a variant of the impellers.
  • One of longitudinal sides of the impeller 33 is secured directly to the rotary shaft 32.
  • the upper and lower supporting rods 34, 35 radially extend from longitudinally opposite ends of the rotary shaft 32 and the impeller 36 is supported by outer ends of these supporting rods 34, 35 so as to be spaced from the impeller 33 by an angular distance of 180°.
  • the impeller 36 is spaced from the rotary shaft 32 to define a space therebetween as shown by Fig. 4.
  • Base fluid for the solid containing foodstuff generally has sufficiently high viscosity to prevent the solids from sinking in the base fluid.
  • the impeller 33 directly secured to and radially extending outward from the rotary shaft may be combined with the impeller 36 radially extending inward from the outer edge of this impeller 36 toward the rotary shaft to define spaces between the inner wall of the mixer 17 and the impeller 33, on one hand, and between the impeller 36 and the rotary shaft 32, on the other hand.
  • Such arrangement can contribute to improve a mixing effect achieved in a direction transverse to the direction of material conveyance.
  • the method of the invention is required to achieve the mixing effect substantially only in the direction transverse to the direction of material conveyance, it is preferred to employ the impellers each configured, for example, to have uniform longitudinal section and/or uniform cross-section such as a rectangle so that, when the impellers are rotated or reciprocated by the drive means, no thrust be generated in the direction of material conveyance, for example, in the direction as indicated by an arrow in Fig. 1.
  • Impellers 38. 39 and 40 may be connected by plates 38a, 39a and 40a to the rotary shaft 32, as shown by Figs. 19, 21 and 23, respectively.
  • Configuration of each impeller depends on shape and size of each solid as well as on viscosity of the fluid as will be described in reference with Figs. 9 through 17.
  • each impeller 41 itself comprises an elongate plate having branches transversely extending toward and connected to the rotary shaft 32 so as to define a space between the impeller and the rotary shaft 32.
  • Another pair of impellers 42, 42 are arranged to define, together with said pair of impellers 41, 41, a cruciform cross-section.
  • Figs. 12 through 14 show an arrangement comprising only one pair of impellers 43 corresponding to the pair of impellers 41 shown by Figs. 9 through 11.
  • Figs. 15 through 17 show another arrangement comprising the rotary shaft 32, branches 47, 48 radially outward extending from longitudinally opposite ends of the rotary shaft 32, impellers 45, 46 in the form of round bars extending in parallel to each other between said branches 47, 48 at outer ends and middle points of these branches, respectively, so that a space 49 is defined between the impellers 45 and 46 and a space 50 is defined between the impeller 46 and the rotary shaft 32.
  • Such assembly of these branches 47, 48 and the impellers 45, 46 is pairly provided on either side of the rotary shaft 32.
  • the impellers are connected to the drive means which is, in turn, actuated under a control of the control means 20 as shown by Fig. 24 so that functions of in- and outlets of each dosing apparatus are inverted as the rotary shaft of the mixer 17 is intermittently rotated.
  • Both the impellers 33, 36 as shown by Figs. 1, 2 and 3 and the impellers 33, 36 as shown by Figs. 4 and 5 function to mix the respective fluids fed through the inlets 21, 21a in a direction transverse to the direction of material conveyance.
  • it is preferred to dimension and installed the impellers so as to have their upper ends above the level of the respective inlets.
  • Shocks exerted by the impellers on the solids may be further alleviated by feeding the solids onto the impellers being at a standstill and then rotating the impellers.
  • Dispensing nozzle (not shown) may be connected to the outlet 22 of the mixer 17 to dispense a predetermined unit quantity of the solid containing food-stuff which has been processed in the mixer into the container.
  • the mode of intermittent rotation as has been mentioned just above will necessarily complicate the control means. From the viewpoint of the mixing effect, the period for which the impellers are at a standstill is a time loss and therefore such processing mode is inefficient so far as a productivity is concerned. Accordingly, if a mixing effect comparable with the mixing effect obtained from the intermittent rotation can be obtained and no significant injuries of the solids can be avoided, continuous rotation will be preferred. To this end, the inventors examined how the solids are injured during continuous rotation of the impellers and found that most of injuries occur due to shocks exerted by the impellers on the solids at the moment when the solids are fed into or discharged from the mixer.
  • impellers may be located immediately below the inlets and lower ends of the impellers may be located immediately above the outlet to avoid the injuries of the solids during the mixing process.
  • the impellers shown by Fig. 6 are partially cut off so as to clear both the inlets and the outlet. Specifically. both the inlet 21 for the fluid of high solid content ratio and the inlet 21a for the base fluid are located above the upper ends of the impellers 33, 36 and the outlet 22 is located below the lower ends of these impellers so that these impellers may be continuously rotated without significantly injuring the solids.
  • the fluid has preferably a viscosity of 100 cp or higher and with the viscosity being lower than this limit the solids sometimes could not behave together with the fluid.
  • CMC carboxy methyl cellulose
  • Case A is the case in which no mixer was used and materials were manually mixed together
  • case B is the case in which the conventional static mixer was used
  • case C is the case in which the inventive mixer was used.
  • the mixer of the invention used in case C was 5 cm in diameter, about 30 cm in length and adapted to be rotated at 30 r.p.m.
  • case B 2 inch-6 element type static mixer (5 cm in diameter, about 40 cm in length) was used.
  • a mixing effect achieved by using the inventive mixer in case C was excellent and color of the strawberry preserve was evenly blended in aqueous solution of CMC.
  • case B using the static mixer the strawberry preserve presented a marble pattern in the base mix, suggesting a poor mixing effect.
  • Yogurt of about 4000 cp was used as the base mix and strawberry preserve was used as the fluid of high solid content ratio to obtain 600 g product. Result of this experiment is graphically shown in Fig. 29.
  • Polygonal line A plots the number of strawberry contained in the final product when the mixer provided with the impellers as shown by Figs. 1, 2 and 3 was continuously rotated. It should be understood that substantially flawless strawberry which can be regarded as whole fruit was counted as the number of strawberry.
  • Polygonal line B plots the result obtained by continuously rotating the mixer provided with the impellers as shown by Figs. 4 and 5.
  • Polygonal line C plots the number of strawberry contained in the final product when the mixer provided with the impellers as shown by Figs. 1, 2, and 3 was intermittently rotated.
  • the mixer of the invention having the same size as the mixer used in Experiment 1 was rotated at various r.p.m in order to compare degrees of injuries depending on r.p.m.
  • Polygonal lines C indicates that the mixing effect is negligibly affected by the r.p.m. while polygonal lines A and B indicate that the number of solids contained in the final product remarkably decreases as the r.p.m. increases.
  • Yogurt of about 4000 cp was used as the base mix and strawberry preserve was used as the fluid of high solid content ratio to obtain 600 g product. The result is graphically shown by Fig. 30.
  • Polygonal line A plots the number of strawberry contained in the final product when the mixer provided with the impellers as shown by Figs. 1, 2 and 3 was continuously rotated.
  • Polygonal line B plots the case in which the mixer provided with the impellers as shown by Figs. 4 and 5 was continuously rotated.
  • Polygonal line C plots the number of strawberry contained in the final product when the mixer provided with the impellers as shown by Figs. 6, 7 and 8 was continuously rotated.
  • substantially flawless strawberry which can be regarded as whole fruit was counted as the number of strawberry. So far as similar samples were mixed in similar manner, the best result was obtained by the mixer provided with the impellers as shown by Figs. 6, 7 and 8 even when this mixer was continuously rotated.
  • the solids can be further effectively protected against injuries by using the impellers partially cut off so as to clear the inlets and the outlet of the mixer even when the mixer is continuously rotated.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP93305410A 1992-07-15 1993-07-09 Dispositif et procédé de mélange de produits alimentaires contenant des morceaux solides Withdrawn EP0579463A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP210827/92 1992-07-15
JP21082792 1992-07-15
JP69985/93 1993-03-29
JP5069985A JP3064143B2 (ja) 1992-07-15 1993-03-29 固形物を含有する食品の混合方法およびその装置

Publications (1)

Publication Number Publication Date
EP0579463A1 true EP0579463A1 (fr) 1994-01-19

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Application Number Title Priority Date Filing Date
EP93305410A Withdrawn EP0579463A1 (fr) 1992-07-15 1993-07-09 Dispositif et procédé de mélange de produits alimentaires contenant des morceaux solides

Country Status (2)

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EP (1) EP0579463A1 (fr)
JP (1) JP3064143B2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113578119A (zh) * 2021-08-12 2021-11-02 国创汇能（武汉）医学工程有限公司 一种次氯酸溶液自动配制装置
CN114452852A (zh) * 2020-10-31 2022-05-10 中国石油化工股份有限公司 一种管道混合器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006158311A (ja) * 2004-12-08 2006-06-22 Nippon Milk Community Co Ltd フルーツソース及びそれを用いるソフトヨーグルトの製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434804A (en) * 1964-08-06 1969-03-25 Ici Ltd Apparatus utilizing a webbed stirrer for continuous mixing
EP0119447A2 (fr) * 1983-02-22 1984-09-26 Wilfried Hacheney Dispositif de préparation de mélanges de matières solide-liquide à haute teneur
US4522502A (en) * 1982-10-22 1985-06-11 Stran Corporation Mixing and feeding apparatus
US4893943A (en) * 1988-06-27 1990-01-16 The Ink Company Method and apparatus for low froth agitation of tanked fluids
WO1993005873A1 (fr) * 1991-09-27 1993-04-01 Henkel Kommanditgesellschaft Auf Aktien Procede pour le melange de liquides ou pour le melange de solides avec des liquides

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434804A (en) * 1964-08-06 1969-03-25 Ici Ltd Apparatus utilizing a webbed stirrer for continuous mixing
US4522502A (en) * 1982-10-22 1985-06-11 Stran Corporation Mixing and feeding apparatus
US4522502B1 (fr) * 1982-10-22 1991-07-23 Stranco
EP0119447A2 (fr) * 1983-02-22 1984-09-26 Wilfried Hacheney Dispositif de préparation de mélanges de matières solide-liquide à haute teneur
US4893943A (en) * 1988-06-27 1990-01-16 The Ink Company Method and apparatus for low froth agitation of tanked fluids
WO1993005873A1 (fr) * 1991-09-27 1993-04-01 Henkel Kommanditgesellschaft Auf Aktien Procede pour le melange de liquides ou pour le melange de solides avec des liquides

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114452852A (zh) * 2020-10-31 2022-05-10 中国石油化工股份有限公司 一种管道混合器
CN114452852B (zh) * 2020-10-31 2023-04-07 中国石油化工股份有限公司 一种管道混合器
CN113578119A (zh) * 2021-08-12 2021-11-02 国创汇能（武汉）医学工程有限公司 一种次氯酸溶液自动配制装置

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Publication number Publication date
JP3064143B2 (ja) 2000-07-12
JPH0678735A (ja) 1994-03-22

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