JPH10229836A - Manufacture of powder food material, and mixer and ball mill therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a powder food material with excellent compatibility, liquid dispersibility and moisture holding property in the mixed state capable of being mixed in any processed food and used by not generating bitterness accompanying roasting, oxidization, turning to β and the destruction of nutritious components. SOLUTION: After water is contained in a grain kind or a bean kind to be a crashing material(M), it is turned to α by successively and continuously imparting a heating/agitating action and a steaming/drying action under a vacuum condition and the crashing material(M) turned to α in a dry state is pulverized into fine particles whose average diameter is less than about 30 microns while continuously performing a cooling action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a powdered food material, and a mixer and a ball mill therefor.

[0002]

2. Description of the Related Art A method for producing brown rice flour, which can be said to be a typical example of a powdered food material, includes a method of pulverizing brown rice as a milling material as it is, and a method of pulverizing brown rice after roasting (Japanese Patent Application Laid-Open No. Sho 57-79). No. 166949), a method is known in which brown rice is once heated under high-pressure conditions and rapidly depressurized to swell its volume and then pulverized.

[0003]

However, in any of these production methods, excessive or excessive heat is added to brown rice under atmospheric conditions, so that the nutritional components of the brown rice are significantly destroyed, and the brown rice is also destroyed. Is easily oxidized because it contains a large amount of oil, and becomes β over time after being turned into α, and cannot be stored for a long time.

Japanese Patent Application Laid-Open No. Sho 60-176553 for the purpose of improving such defects has also been proposed, but in the production method described therein, steaming, drying and roasting are performed while stirring hydrated brown rice. Are carried out in the same roasting pot and then crushed, so the bitterness peculiar to roasting cannot be eliminated, and the range of use as a powdered food material is naturally limited. In addition, there are other problems such as the necessity of preparing a large number of roasting apparatuses for mass production, and the high costs required for the operation.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to drastically solve the above-mentioned problems. As a method for producing a powdered food material useful for this purpose, a method is described in which a cereal or beans serving as a crushing material is impregnated with water. , Heating / stirring and steaming under vacuum conditions
It is characterized in that it is pregelatinized by successively applying a drying action, and the pregelatinized, dry granulated material is pulverized into fine particles having an average diameter of about 30 μm or less while continuing to cool.

Further, as a mixer for carrying out the above-mentioned method, a cylindrical stirring tank having a bottom and containing a fixed unit amount of grains or beans which are crushing materials, an opening / closing lid on the top surface thereof, and the stirring tank A cable heater for heating the crushing material by being buried in the trunk wall surface and the opening / closing lid, respectively;
Rotary stirring blades rotatably and rotatably supported in the stirring tank via a rotating blade shaft vertically hanging on the bottom surface of the stirring tank, and fixedly suspended integrally from the opening / closing lid into the stirring tank. A stirring blade, a temperature detection sensor that is attached to a lower end of the fixed stirring blade to detect a target temperature for heating the crushing material, and an opening / closing lid for reducing the pressure in the stirring tank to a vacuum state. And a vacuum pump communicatively connected with

[0007] The crushed material charged into the stirring tank after being hydrated is heated by the cable heater under the condition of maintaining the vacuum state in the stirring tank and self-heated by the stirring action of the stirring blade. When the vacuum pump cannot completely absorb the water of the crushed material over time, the crushed material is automatically shifted to the steaming state and the drying state by itself, and the drying at the set target temperature is performed. It is characterized by setting to finish in the state,

Further, as a ball mill to be used for carrying out the above method, a closed cylindrical pulverizing tank fixed in a horizontal state due to its configuration, the number of pulverizing balls sealed in the pulverizing tank, and An annular cooling jacket for cooling water flow formed on the body wall of the tank, a crushing material input hopper opened at the operation start end of the crushing tank, and a ball receiving screen that also partitions the operation end of the crushing tank, An air pump for pumping air from the operation start end toward the operation end portion by being connected to the product discharge path defined at the operation end portion and the grinding tank, and an operation start end portion of the grinding tank. A rotatable blade that is rotatably driven from the hopper along the longitudinal center line, a screw blade fixed to the rotary blade shaft below the hopper, and a screw for the screw blade. As distribution to maintain a constant distance from the working end of the blade, and a plurality of disc-type dispersion blade which is likewise fixed to the rotary blade shaft,

[0009] Under the pre-gelatinized and dry state, the cereals or beans as the crushing material charged into the crushing tank are cooled under the cooling conditions of cooling water in the cooling jacket. And a powder food material finished as a product is set to pass through the ball receiving screen to a product discharge path and to be taken out. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 3 show a special mixer (A) used for producing a powdered food material according to the present invention. In this way, a series of heating, stirring, steaming, and drying actions are applied to the cereals and beans that serve as the crushing material (M), so that the grains and beans are finished in a pregelatinized dry state.

Reference numeral (10) denotes a housing of the mixer (A), and (11) denotes a stirring tank fixedly supported on substantially one half of the mixer, and has a depth of about 780 mm and a diameter of about 80 mm from a steel plate.
It is shaped into a cylindrical shape with a bottom of 0 mm, and about 60 m
A cable heater (12) for heating the crushing material (M) is provided on the body wall of the double structure having a thickness of m.
It is buried in a wound state. A preferred temperature of the cable heater (12) is about 180 ° C.

Reference numeral (13) denotes a rotating blade shaft which is vertically erected so as to penetrate the upper and lower portions of the stirring tank (11) and the installation machine casing (10), and is exposed into the stirring tank (11). At the upper end, a flat rotating stirring blade (14a) (1
4b) is fitted so that it can rotate integrally. In addition, the rotary stirring blades (14a) (14b) are installed in a horizontal state near the bottom surface in the stirring tank (11). On the other hand, a transmission pulley (15) is also fitted to the lower end of the rotating blade shaft (13) facing into the installation machine casing (10) so as to be able to rotate integrally.

In this case, in the illustrated example, the cross-shaped rotary stirring blades (14a) (14a) (14
The upper and lower pair of b) is shown, but the number and height of the blades can be adjusted according to various conditions such as the type and properties of the crushing material (M). It is also possible to attach and detach and replace it with a separate rotary agitating blade different from the above.

An electric motor (16) is mounted on the other half of the installation casing (10) in a state of being fixed in parallel with the stirring tank (11), and has a lower end facing the interior of the casing (10). Output pulley (17) and the transmission pulley (1)
A transmission belt (18) is wound and stretched between each other. The motor (16) causes the rotary stirring blades (14a) (14b) to move in the direction of the arrow (r) in FIG.
It is designed to be driven to rotate.

Reference numeral (19) denotes a slide-type opening / closing lid for covering the top surface of the stirring tank (11).
It is attached to the upper end of the body wall in 1) via a pivot mechanism (20). (21) is a hydraulic pump for pushing up the opening / closing lid (19), and (22) is a plurality of clamps for fixing the opening / closing lid (19) in a state of covering the stirring tank (11) against the pushing force. When the opening / closing lid (19) is released, the opening / closing lid (19) rises from the agitation tank (11) by the hydraulic pump (21), so that the opening / closing lid (19) is turned laterally as shown in FIG. Thereby, the top surface of the stirring tank (11) can be opened, and the crushing material (M)
Can be put in and out.

The opening / closing lid (19) is also made of a steel plate to a thickness of about 6
It has a double structure of 0 mm, in which a cable heater (23) for heating the crushing material (M) is buried. The cable heater (2
3) is about 1 which is slightly higher than that of the stirring tank (11).
It is desirable to set to 90 ° C.

Reference numeral (24) is a fixed stirring blade integrally suspended from the eccentric position of the opening / closing lid (19) toward the inside of the stirring tank (11) by a depth of about 460 mm, which is also flat. When viewed from a plane as shown in FIG. 3, the rotary stirring blades (14a) and (14b), which are driven to rotate in the direction of the arrow (r), and the flat plate surfaces form an acute angle (θ) when viewed from a plane as shown in FIG. Crosses the relationship to keep.

The crushing material (M) stirred by the rotary stirring blades (14a) (14b) is transferred to the fixed stirring blades (2).
As described in 4), the material is turned back once to generate frictional heat based on the rapid flow change, and the crushing material (M) can be uniformly agitated as a whole.

In this regard, in the illustrated example, only one of the fixed stirring blades (24) is suspended, but a plurality of the fixed stirring blades (24) may be suspended from the opening / closing lid (19) of the stirring tank (11). However, the crushing material (M) includes a rotary stirring blade (14a) (14b).
Due to the centrifugal force of the agitation, the fixed stirring blade (24) that turns it back faces the position close to the body wall of the stirring tank (11), and the crushing material (M) adheres to the body wall. It is desirable to prevent.

Reference numeral (25) denotes a contact-type temperature detection sensor attached to the lower end of the fixed stirring blade (24), which detects the heating temperature of the crushing material (M) and determines the temperature in advance. When the set target temperature is reached, an electric control circuit is configured to stop the driving motor (16) of the rotary stirring blades (14a) (14b). The set target temperature of the crushing material (M) is preferably determined to be at most about 75 ° C. so as not to destroy the nutrient components. This temperature is also a height at which the crushing material (M) can be turned into α.

Further, reference numeral (26) designates an exhaust port tube which is integrally and vertically erected outward from the eccentric position of the opening / closing lid (19), and is provided with a vacuum pump via a flexible hose (27) having a fixed length. (28) and the vacuum pump (2
According to 8), the inside of the stirring tank (11) is depressurized,
The vacuum can be maintained.

(29) is a vacuum valve inserted and installed in the connection path, (30) is an atmosphere valve, and (31) is an atmosphere release valve, both of which are electrically controlled solenoid valves. (32) is a vacuum gauge. The regulator is not shown.

In producing the powdered food material of the present invention using the above-mentioned mixer (A), a certain amount of cereals or beans as the crushing material (M) is mixed with hot or cold water for a certain time. After the water is removed, the mixture is poured into the stirring tank (11) of the mixer (A), and the stirring tank (11) is fixed in a state of being covered with the opening / closing lid (19).

At this time, the crushing material (M) is not limited to a method in which the crushing material (M) is immersed in hot water or water in a separate container, drained, and then transferred into the stirring tank (11) from above. It is also possible to cut off the water by directly immersing in (11) and draining the hot water from the stirring tank (11). The former method is for cereals, and the latter method is for beans. It can be said that it is useful.

In any case, after the stirring tank (11) is covered, the vacuum pump (28) is operated to reduce the internal pressure to a vacuum state, and the crushing material (M) under the vacuum condition is operated. The rotary stirring blades (14a) and (14b), which are driven to rotate at a speed of about 700 rpm, and the fixed stirring blades (24) hanging down from the opening / closing lid (19) perform a uniform stirring action.

Then, the crushing material (M) is supplied to the stirring tank (1).
1) Cable heater (12) and its opening / closing lid (19)
The cable heater (23) receives a heating action from the outside, while the stirring blades (14a) (14)
b) In the process of undergoing the vigorous stirring action of (24),
The self-heating action also occurs due to the repetitive friction, and the overall temperature rises efficiently.

However, since such a heating / stirring action is performed under vacuum conditions, the crushing material (M)
There is no danger that the nutrients may be destroyed or scorched (generation of bitterness) due to the addition of excess heat, such as the phenomenon of crushing.

Then, when the vacuum pump (28) stops absorbing the moisture, it automatically shifts to the steaming state of the crushing material (M). M) will undergo a drying action by itself.

That is, the steps of heating, stirring, steaming and drying the above-mentioned crushing material (M) are automatically and continuously executed in the same stirring tank (11). Temperature reaches about 75 ° C., which is the target temperature, and finally, the dry crushing material (M) which is stable and pregelatinized and has a water content of about 10% or less.
Can be obtained.

Then, the fact that the temperature of the crushing material (M) has been raised to the set target temperature is indicated by the heating temperature detecting sensor (25).
, The drive motor (16) of the rotary stirring blades (14a) (14b) electrically connected thereto is stopped, and the vacuum pump (2)
Since the vacuum state in the stirring tank (11) according to 8) is also released, the top surface of the stirring tank (11) is opened, and the above-mentioned crushed material in a stable dry state that does not revert to beta (aging) is restored. (M)
Is taken out of the stirring tank (11).

Next, FIGS. 4 to 6 show a special rotary aeration type ball mill (B) for continuously pulverizing the pre-gelatinized dry granules (M) into fine particles of a target size. I have.

(33) is a grinding tank of the ball mill (B), which is fixed in a horizontal state as a closed cylindrical type having a length of about 910 mm and a diameter of about 200 mm, and a chrome steel inside. Ball for grinding (3
The number of groups of 4) is enclosed. The ball (34) causes the crushing material (M) to repeatedly rub and crush into fine particles of a target size.

In this regard, in the illustrated example, the target size is set to about 10 microns or less, and the ball (34) having a size of about 3/8 inch is placed in the grinding tank (33) for about 3/8 inches.
Although only about 75 kg corresponding to / 4 is accommodated, a ball (34) made of chromium steel larger than the above value can be employed, with the target size being up to about 30 microns.

The body wall of the grinding tank (33) has a ball (3
The inner wall surface (33a) made of the same chrome steel as in 4) and an outer wall surface (33b) made of a steel plate are formed in a double structure, and the hollow inside thereof is formed as an annular cooling jacket (35). Approximately 12 liters of cooling water are flowed per minute so that the crushing material (M) can be ground while maintaining the cooling condition at about 35 ° C. or less.

That is, the crushing material (M) is rubbed between the crushing ball (34) and the inner wall surface (33a) of the crushing tank (33) and generates excessive heat, The purpose is to prevent the possibility that the nutrient may be destroyed by the cooling action of the cooling water flowing through the cooling jacket (35).

An air inlet / outlet cylinder (37) from an air pump (36) is connected to the operation start end in the longitudinal direction of the crushing tank (33). Is formed downward as a product discharge path (38) through which the finished product-powder food material (P) after pulverization can be dropped.

(39) is a ball receiving screen defining the product discharge path (38), which is formed of chrome steel into a fence shape as shown in FIG.
It is interposed and installed in the partition state in 3). As a result, the crushing balls (34) and foreign substances are received, and repeated and continuous crushing is enabled, and only the crushed powdered food material (P) is smoothly passed through the discharge path (38). ing. As long as that is the case, a ball receiving screen (39) having a lattice shape or a circular hole shape instead of the illustrated fence shape may be employed.

In any case, the ball receiving screen (39) is detachable / replaceable with a separate ball receiving screen having different gap widths, different hole diameters, etc. according to the size of the crushing balls (34). Crushing tank (3
3) Can be installed and used inside.

(40) a cooling water inlet tube to the cooling jacket (35), (41) a cooling jacket (35)
From the cooling water outlet tube from FIG.
The former is formed on the top surface of the crushing tank (33), and the latter is formed on the bottom surface of the crushing tank (33). The cooling water inlet cylinder (40) of the former is particularly connected to the crushing tank (33). The reason why the cooling water is directed toward the latter cooling water outlet tube (41) by disposing it at a position deviated near the operation end point is as follows.

The crushing ball (34) receives the air pressure from the air pump (36) and the pressing force of a screw blade described later, and stays in a dense state at the end of operation of the crushing tank (33). It is likely that the heat of friction of the crushing material (M) is highest and may destroy nutrients, so that it is effectively cooled by fresh cooling water having a low temperature and farthest from here. This is for distributing and disposing the cooling water outlet tube (41) in the vicinity of the operation start end to effectively use the cooling water.

A crushing material input hopper (42) is also provided so as to face the cooling water outlet tube (41) and integrally with the top surface at the operation start end of the crushing tank (33). The dry crushing material (M) is placed in the crushing tank (3
3) Will be thrown into.

(43) is a horizontally installed state along the longitudinal center line of the crushing tank (33), and a rotating blade axis introduced from the operation start end thereof, and (44) is a rotating blade axis (43) thereof.
Transmission pulley fitted and integrated into the exposed end of the
Reference numeral 5) denotes an electric motor for driving the rotary blade shaft (43). A transmission belt (47) is wound around an output pulley (46) and the transmission pulley (44). I have.

(48) is a hopper (4)
The relationship corresponding to the position below 2) is a crushing material pressing screw blade fixed so as to be able to rotate integrally with the operation start end of the rotary blade shaft (43), whereby the hopper (42) As shown by the arrow (f) in FIG. 4, the charged crushing material (M) is pushed toward the operation end portion in the crushing tank (33).

A plurality (49) of a plurality (4 in the example shown in the figure) of a state of being distributed so as to be able to rotate integrally with the rotating blade shaft (43) as a distribution state which keeps a constant distance from the end of operation of the screw blade (48). Pieces) of ball dispersion blades, the same chrome steel as the screw blade (48), having a diameter of about 15 mm.
It is formed in a 0 mm disk shape.

The dispersion pressure of the ball (34), which is subjected to the air pressure from the air pump (36) and the pressing force of the screw blade (48) to the working end portion in the crushing tank (33), is determined by the dispersion blade. (49) to prevent,
They can be dispersed as uniformly as possible.

However, one dispersing blade (49) located at the end of operation of the rotating blade shaft (43) is relatively close to the ball receiving screen (39), and the distance between the dispersing blades (49) is small. 49) Dimensions are narrower than adjacent spaces between each other. Thus, the crushing material (M) is crushed into uniform fine particles, and the crushed product-powder food material (P) is discharged from the screen (39) through the discharge path (3).
8) The reason is to pass through without fail.

In the above-mentioned ball mill (B), in order to continuously pulverize the pre-gelatinized dry granulated material (M), grains or beans as the granulated material (M) are put into a hopper ( From 42), the balls are previously charged into the grinding tank (33) containing the grinding balls (34) at a constant supply speed.

Then, while a fixed amount of air is pressure-fed from an air inlet tube (37) of the pulverizing tank (33) toward a product discharge path (38) by an air pump (36),
The rotating blade shaft (43) is rotationally driven at a speed of about 400 rpm by the driving motor (45).

Then, the crushing material (M) and the crushing ball (34) are subjected to the air pressure from the air pump (36) and the pressing force of the screw blade (48), so that the operation of the crushing tank (33) is performed. As shown by the arrow (f) in FIG. 4, the crushing material (M) repeatedly receives the frictional force of the ball (34) from the starting end to the working end as shown by the arrow (f) in FIG. Is crushed into fine particles having a target size corresponding to the size of the particles.

During the pulverizing operation, the crushing material (M) subjected to the rotational centrifugal force causes mutual movement between the inner wall surface (33a) of the crushing tank (33) and the ball (34) also subjected to the rotational centrifugal force. In this case, since the friction is repeated, there is a possibility that excessive heat is generated, and the heat is remarkable at the operation end portion of the grinding tank (33) which tends to stay in the dense state of the balls (34). The important phenomenon is that the cooling action of the cooling water flowing through the cooling jacket (35) is suppressed to about 35 ° C. or less, so that there is no possibility that the nutrient component of the crushing material (M) is destroyed.

The grinding balls (34), the inner wall surface (33a) of the grinding tank (33), the ball receiving screen (39), and the screw blades (4) of the rotating blade shaft (43).
8) and the dispersion blade (49) are each made of a high-strength chromium steel, so that the above-mentioned gelatinized dry crushing material (M) can be reliably pulverized, and a powder of a target size is obtained. Food material (P) can be efficiently finished,
Excellent durability in mass production.

Then, the product-powder food material (P) pulverized into fine particles of the target size is placed in the pulverizing tank (3).
3) It can be taken out from the product discharge path (38).
Since the ball (34) is received by the screen (39) and is still in the state of being housed in the crushing tank (33), the crushing material (M) can be successively crushed, which is extremely useful for mass production. It is.

An example in which the production method of the present invention is applied to brown rice as the crushing material (M) and the brown rice is finished to brown rice flour as the powdered food material (P) is as follows.

<Example> The cable heater (1) of the stirring tank (11) in the mixer (A) shown in FIGS.
2) at 180 ° C, the cable heater (23) of the opening / closing lid (19) at 190 ° C, and the target heating temperature of brown rice at 75 ° C.
° C, the rotating speed of the rotating blade shaft (13) was set to 700 rpm, and the brown rice 1 immersed in water for about 40 minutes.
After draining 80 kg of water for about 25 minutes, it is poured into the stirring tank (11) of the mixer (A) and the stirring tank (1)
Under the condition of maintaining the vacuum condition in 1), a heating / stirring action for about 40 minutes, a steaming action for about 20 minutes and a drying action for about 1 hour were given.

On the other hand, 3/8 inch grinding balls (34) are put into a grinding tank (33) of a rotary ventilation type ball mill (B) shown in FIGS. About 12 liters of cooling water is flowed per minute to the cooling jacket (35) of the grinding tank (33), and the cooling temperature of the cooling water is set to 35 ° C. or less, and the rotating blade shaft ( 43) Rotation speed of 400 rpm
m, the ball receiving screen (39) was set to 400 mesh capable of removing foreign substances.

Then, the stable browned brown rice having a water content of 10% or less was obtained by using the mixer (A), and was then transferred to the grinding tank (33) of the ball mill (B). And milled to obtain brown rice powder having an average diameter of 10 microns or less.

The results of analyzing the main nutritional components contained in the brown rice flour are as shown in the following nutritional component table.
In addition, Comparative Example 1 described in the table is a conventional brown rice powder obtained by pulverizing brown rice after roasting as it is, and Comparative Example 2 is disclosed in JP-A-60-176553 described at the beginning. It shows corresponding conventional brown rice flour obtained by roasting the brown rice once gelatinized and then grinding.

[0058]

[Nutrient composition table]

As is evident from the above nutritional component table, brown rice flour as the powdered food material (P) produced according to the present invention shows a slight loss in lipids and carbohydrates, but water content in 100 g of brown rice flour. Even if the weight ratio of 6.9 g is 6.9 g and finished to a dry state with a water content of about 7%, the destruction of nutrients is hardly observed, and extremely high nutritional value of proteins and fibers, especially minerals and vitamins. Can be obtained. In addition, it can be said that a decrease in lipids and carbohydrates is useful for preventing diabetes.

[0060] For this reason, the stable pregelatinized dry state with a water content of 10% or less is maintained, and in addition to the fact that the particles are finished to a fine particle of 10 microns or less, the product-based on the umami component remaining in the brown rice flour. , You can eat it directly, as well as various pastes, soups, stews,
It can be widely and effectively mixed and used as a material for all processed foods such as noodles, confectionery, konjac, tofu, beverages, etc., with compatibility in the mixed state, dispersibility in liquids and water retention etc. It is excellent.

The embodiment of the present invention in which the target powdered food material (P) was used as brown rice flour as brown rice flour was described above. It is also possible to produce a powdered food material (P) by exactly the same method while using a rotary aeration type ball mill (B), and when applied to beans, it is pulverized to fine particles of about 30 microns or less. Is preferable for achieving effects such as oxidation prevention.

Furthermore, the mixer (A) and the ball mill (B) according to the production apparatus of the present invention can be applied to cereals and beans such as brown rice and white rice as well as seaweeds and vegetables. . When the seaweeds and vegetables are used as a crushing material (M) and powdered food materials (P) are to be manufactured from now on, the immersion in hot water or hot water is not for pre-gelatinization, but a cleaning action to extrude and remove foreign matter. As well as produce a coloring effect as a finished product.

Then, while the water of the above seaweeds and vegetables is cut off and, in a preparatory state roughly cut to an appropriate size, this is poured into the stirring tank (11) of the mixer (A), and If a series of heating, stirring, steaming, and drying actions are given under vacuum conditions, a cable heater (1
2) Heating action by (23) and stirring blade (14a) (1
4b) The self-heating effect due to friction with (24) is promoted, so that the dried crushing material (M) can be obtained efficiently in a short time.

The crushed material (M) in a dry state is continuously transferred into the crushing tank (33) of the ball mill (B), and crushed under the cooling condition, whereby the brown rice flour of the cereal is removed. Similarly, a powdered food material (P) having a target size can be finished.

As described above, in the case of a powdered food material (P) produced from seaweeds and vegetables, the size of the fine particles is preferably set to about 2 μm or less. Since the color that appears on the surface of seaweeds and vegetables varies depending on the place of production, there is a problem that it is difficult to mix and use processed food as a powdered food material. If this is the case, the color of the core without the variation can be reliably displayed, and it is also useful for preventing discoloration.

[0066]

As described above, according to the present invention, as a method for producing a powdered food material (P), cereals or beans as its crushing material (M) are hydrated, and then heated and stirred under vacuum conditions. Function and steaming / drying action in order
The granulated material (M), which has been pregelatinized and dried, is pulverized into fine particles having an average diameter of about 30 μm or less while continuously cooling, thereby completely solving the problems of the prior art. effective.

That is, according to the above-mentioned production method of the present invention, JP-A-57-166949 and JP-A-60-176 mentioned at the outset.
Since it does not have a roasting process as in No. 553 and the grinding process is also performed under cooling conditions,
The powdered food material (P) has no risk of causing bitterness, oxidation, aging, and destruction of nutritional components.

In the case of the present invention, the crushed material (M) containing water is heated, agitated, steamed and dried under vacuum conditions, and the dried granulated material (M) is stably pregelatinized. Since the crushing material (M) is continuously pulverized under cooling conditions, no extra or excessive heat is added in the production process, so that it does not cause burning (bitterness) and nutritional components. There is no danger of being destroyed.

As a result, the powdered food material (P) itself can be tasted by the preservation of the pregelatinized umami component, and the powdered food material (P) can be pulverized into fine particles having an average diameter of about 30 μm or less. Improve the texture of various processed foods, add nutritional value, connect water and shape,
In order to maintain the fragrance and the like, it can be effectively mixed and used, and the range of use can be expanded infinitely.

In particular, if the production method of claim 2 is adopted, a series of heating, stirring, steaming,
The drying action can be automatically performed by the same agitation tank (11), and not only is the mass productivity of the powdered food material (P) remarkably excellent, but also the fine particles having an average diameter of about 10 microns or less are obtained. The effect on mixed use can be further enhanced.

Further, since the mixer (A) for producing the powdered food material (P) has the structure described in the third aspect, the mixer (M) of a fixed amount is automatically and continuously heated efficiently. -It can be agitated, steamed and dried, and has the effect of being easily mass-produced as a stable and pregelatinized dry granulated material (M).

Further, since the ball mill (B) for producing the powdered food material (P) has the structure described in claim 4,
A certain unit amount of the crushing material (M) can be easily pulverized into fine particles of a target size, and excessive or extra heat generated in the process is cooled by flowing into the cooling jacket (35). With water, it is possible to cool effectively and naturally, and it is possible to reliably prevent the nutrient component from being destroyed.

In this case, if the structure of claim 5 is adopted, the crushing material (M) can be used while efficiently using the cooling water.
Can increase the cooling effect at the place where heat is most likely to be generated at the highest temperature, and it can be said that this is a remarkably rational design.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view of a mixer used for producing a powdered food material according to the present invention.

FIG. 2 is a side sectional view showing the stirring tank extracted from FIG. 1;

FIG. 3 is a plan view showing an open state of the stirring tank.

FIG. 4 is a side sectional view of a rotary ventilation ball mill used for producing a powdered food material according to the present invention.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

[Explanation of symbols]

 (11) ・ Stirring tank (12) ・ Cable heater (13) ・ Rotating blade shaft (14a) ・ Rotating stirring blade (14b) ・ Rotating stirring blade (19) ・ Opening / closing lid (23) ・ Cable heater (24) ・ Fixed Stirring blade (25), temperature detection sensor (28), vacuum pump (33), grinding tank (34), ball (35), cooling jacket (36), air pump (38), product discharge path (39), ball catching Screen (42), crushing material input hopper (43), rotating blade shaft (48), screw blade (49), disk-type dispersion blade (A), mixer (B), ball mill (M), crushing material (P)・ Powder food material

Claims (5)

[Claims] Claims: 1. Grains or beans to be crushed (M) are impregnated with water and then subjected to a heating / stirring action and a steaming / drying action successively and continuously under a vacuum condition to obtain an α. A method for producing a powdered food material, characterized in that the granulated material in the dry state (M) is pulverized into fine particles having an average diameter of about 30 μm or less while continuously cooling. 2. A hydrated cereal or beans serving as a crushing material (M) is charged into a stirring tank (11) of a mixer (A), and the stirring tank (11) is covered under vacuum conditions. By continuously and sequentially applying the heating / stirring action and the steaming / drying action to the above-mentioned crushing material (M), the crushing material (M) is gelatinized to a water content of about 10% or less. Is continuously transferred into the grinding tank (33) of the ball mill (B), and the average diameter is about 1
The method for producing a powdered food material according to claim 1, wherein the powdered food material is pulverized into fine particles having a size of 0 micron or less. 3. A closed-bottomed cylindrical stirring tank (11) for accommodating a fixed amount of cereals or beans as a crushing material (M), an opening / closing lid (19) on the top surface thereof, and the stirring tank (11). The cable heaters (12) and (23) for heating the crushing material (M) by being buried in the body wall surface and the opening / closing lid (19), respectively, and a rotation standing vertically on the bottom surface of the stirring tank (11). Blade axis (1
3) via a rotating stirring blade (14a) (14b) rotatably supported in the stirring tank (11) via the opening / closing lid (19) into the stirring tank (11). A fixed stirring blade (24) that is suspended from the chiller, and a temperature detection sensor (25) that is attached to the lower end of the fixed stirring blade (24) to detect a target temperature set for heating the crushing material (M). And a vacuum pump (28) connected to the open / close lid (19) to reduce the pressure in the stirring tank (11) to a vacuum state. Fee (M)
Under the condition that the stirring tank (11) is kept in a vacuum state, the heating is effected by the cable heaters (12) and (23), and the stirring blades (14a) and (14b) are operated.
When the vacuum pump (28) stops absorbing the water of the crushed material (M) over time, the crushed material (M) is brought into a steaming state by itself. A mixer for producing a powdered food material, wherein the mixer is set so as to sequentially shift to a drying action state and finish in a dry state in which the set target temperature has been converted into an α state. 4. A closed cylindrical pulverizing tank (33) fixedly installed in a horizontal state, and a pulverizing ball (3) sealed in the pulverizing tank (33).
4), an annular cooling jacket (35) also formed on the body wall surface of the crushing tank (33) for flowing cooling water, and a crushing material formed at the starting end of the crushing tank (33). A product discharge path (38) defined at the end of operation by a charging hopper (42) and a ball receiving screen (39) which also partitions the end of operation of the crushing tank (33); An air pump (36) for pumping air from the operation start end to the operation end portion by being connected to the rotation starter; and a rotary drive introduced along the longitudinal center line from the operation start end of the grinding tank (33). A possible rotating blade shaft (43) and the hopper (42) at the rotating blade shaft (43)
Screw blades (48) fixed to the lower position of the blades, and a plurality of disks similarly fixed to the rotary blade shaft (43) in a distributed state in which the screw blades (48) are arranged at a constant distance from the end of operation of the screw blades (48). The crushing tank (33) under a pre-gelatinized dry state.
The cereals or beans as the crushing material (M) charged into the inside are crushed into fine particles of a target size by the balls (34) under the cooling condition of cooling water in the cooling jacket (35). The powdered food material (P) finished as a product is set to pass through the ball receiving screen (39) to the product discharge path (38) to be taken out. Ball mill for manufacturing. 5. A cooling water inlet tube (40) for the cooling jacket (35) is formed on the top surface of the grinding tank (33) which is offset toward the end of operation, while the cooling jacket (35) is provided.
The cooling water outlet tube (41) from the
5. The ball mill for producing a powdered food material according to claim 4, wherein an opening is formed in a bottom surface deviated to the operation start end in the step (3).