JP5930395B2 - Method and apparatus for milling low-grade brown rice - Google Patents

Description

  The present invention reduces the occurrence of crushed rice even if it is poor quality raw brown rice mixed with hard rice and soft rice, such as brown rice mixed with a lot of immature rice and brown rice mixed with a lot of cracked rice The present invention relates to a method and apparatus for scouring low-grade brown rice that can be used.

  When operating a grain mill installed in a rice mill, etc., the worker confirms the properties of the brown rice (moisture, varieties, production area, post-harvest preparation method, etc.) in advance, Depending on experience and intuition, movement of the resistor in the sperm chamber is adjusted and sperm is started. This is because setting the optimum milling conditions for the grain mill according to the properties of the brown rice contributes to significantly improving the milling accuracy and yield. However, such manual adjustment of the movement of the resistor of the pulverizer is poorly reproducible and the setting criteria are ambiguous. Therefore, the applicants do not rely on the experience and intuition of such workers, so that the gap between the resistor and the peripheral surface of the grinding roll is accurately selected according to the properties of the brown rice so that adjustment can be performed easily. Have applied for a resistor adjusting method and a resistor adjusting jig for such a grain refiner, and have already been disclosed in Patent Document 1.

  When adjusting the amount of protrusion by directing the resistor into the polishing chamber, this one uses a resistor adjusting jig provided with a plurality of measuring parts having different outer diameters depending on the properties of brown rice to be refined. Depending on the properties of the brown rice, one measuring part corresponding to the brown rice to be polished of the resistor adjusting jig is inserted into the gap between the whitening roll and the resistor, and the distance between the grinding roll and the resistor is determined. The amount of protrusion of the resistor is adjusted. Thereby, the value of the gap between the resistor and the outer peripheral surface of the grinding roll can be accurately selected according to the properties of the brown rice, and the yield can be improved.

  However, the resistor adjusting method in the grain mill described in Patent Document 1 can deal with high-grade brown rice with few defectives, but there are many defectives in Southeast Asian countries such as China, Korea and Taiwan. Could not cope with low grade brown rice. That is, in Southeast Asian countries, it is normal not to select carefully for the purpose of improving the yield, and the quality of the raw brown rice is very bad. For example, short grain brown rice in China, Korea, and Taiwan is low-grade brown rice that contains 22-23 wt% of cracked rice and 7 wt% of immature rice in the sized granulated rice. On the other hand, short grain brown rice in Japan is high-grade brown rice containing about 5 to 6% by weight of cracked rice and about 2 to 3% by weight of immature rice. Therefore, even if the short grain brown rice in China, South Korea and Taiwan is refined by a pulverizer adjusted by the above-mentioned method, a large number of defectives cause a lot of crushed rice and greatly reduce the yield. It was.

Japanese Patent No. 4930956

  In view of the above problems, the present invention is a low-grade brown rice milling method that can reduce the occurrence of broken rice, even if it is a low-grade brown rice produced in foreign countries that contains a lot of defectives such as immature rice and cracked rice, and its It is a technical problem to provide a device.

  In order to solve the above-mentioned problems, the present invention has a grinding-type whitening roll attached to a rotatable main shaft, and a grinding-type stripping metal mesh cylinder is erected around the grinding-type whitening roll through a gap. A vertical grinding mill with a gap formed in the milling chamber, and a friction stirrer roll attached to a rotatable main shaft, and a frictional type demolition wire mesh cylinder around the frictional stirrer roll via a gap And a vertical friction milling machine in which the gap is formed in the milling room, and a grinding apparatus configured to join the vertical grinding milling net of the vertical grinding mill The supporting column is provided with a long resistor that projects toward the milling chamber and imparts resistance to the movement of the grain by rotating the grinding-type whitening roll in the circumferential direction. The friction-type dehuller mesh cylinder of the friction-type grain mill is provided with a plurality of resistance bars at the inner corners thereof, In the longitudinal direction of the friction-type stirring roll of the friction-type grain mill, a long length that imparts resistance to the movement of the grain superimposed on the plurality of resistance bars by rotation of the friction-type stirring roll in the circumferential direction. Technical measures were taken to provide a stir bar.

  According to claim 2, the elongated resistor, the plurality of resistance bars, and the elongated stirring bar are each formed in a prismatic shape, and the corners projecting toward the sperm chambers. The part is formed by C chamfering of 0.1 to 0.3 mm.

  Further, according to the third aspect, the milling apparatus includes the saddle-type grinding machine, the first-type friction milling machine as the second machine, and the saddle-type friction milling machine. Is selected as the No. 3 machine, and the three units are configured to be connected to each other, while the whiteness of the raw material discharged from the first machine is increased by about 6 to 11 from the whiteness value of the raw brown rice. Thus, the protruding amount of the resistor in the sperm chamber is set to a predetermined value.

  According to the fourth aspect of the present invention, the amount of protrusion is set so that the gap between the resistor provided in the first milling chamber and the outer peripheral surface of the grinding type whitening roll is 4 to 6 mm. A gap between the resistance bar and the stirring bar in the numbering machine and the numbering machine 3 is set to 4 to 6 mm.

  According to a fifth aspect of the present invention, a water addition device is attached to the third machine.

  According to the sixth aspect of the present invention, a grinding type whitening roll is axially attached to a rotatable main shaft, and a grinding type stripping wire mesh cylinder is erected around the grinding type whitening roll via a gap. A vertical grinding mill that is formed in the milling chamber and a friction stirrer roll attached to a rotatable main shaft, and a friction-type stripping wire mesh cylinder is provided around the frictional stirrer roll via a gap. A vertical friction pulverizer with a gap formed in the cocoon chamber, the vertical grinding pulverizer being the first machine, and the vertical friction pulverizer being the second machine. In addition, in the method for milling low-grade brown rice in a milling apparatus in which the third type friction milling machine is selected as the third machine, the raw brown rice having a whiteness value of 18 to 22 is used as the first machine. And the amount of protrusion of the resistor provided in the sperm chamber is set so that the raw material having a whiteness value of 26 to 29 is discharged. Then, the gap between the resistance bar and the stirring bar provided in the milling chamber is set so that the raw material having a whiteness value of 34 to 38 is discharged from the second machine, and then the third machine is used. In this method, a low-grade brown rice milling method was used in a grain refiner that performs milling by setting a gap between a resistance bar and a stirring bar provided in the milling chamber so that a milled product having a whiteness value of 38 to 42 is discharged.

  Furthermore, according to the seventh aspect, the protrusion amount is set so that a gap between the resistor provided in the first milling chamber and the outer peripheral surface of the grinding type whitening roll is 4 to 6 mm. It is characterized in that it is a low-grade brown rice milling method in a grain refiner that performs milling by setting the gap between the resistance bar and the stirring bar of the machine No. 3 and machine No. 3 to 4-6 mm.

  When the raw brown rice is supplied to the milling apparatus of the present invention, first, the surface of the rice grain is polished by the abrasive grains of the grinding type whitening roll in the vertical grinding mill, and the skin is shaved. At this time, the brown rice is flowing in the milling room, but it germinates when the germ part of the brown rice collides with a long resistor protruding from the milling room. The germination rate is increased by increasing the number of collisions between the resistor and the embryo part. And if raw material brown rice is 100 weight%, 5-20 weight% brown rice will be sprouting in a vertical grinding mill.

  Next, the raw material is supplied to a vertical friction type grain refiner. In a vertical friction type pulverizer, rice grains are rubbed against each other to peel off the surface skin. At this time, since the sprouting is sufficiently performed by the vertical grinding pulverizer in the previous process, the pressure in the semen chamber of the vertical frictional pulverizer in the subsequent process can be reduced. In the milling room, brown rice is agitated by superimposing a plurality of resistance bars provided at the inner corner of the friction-type wire mesh cylinder and a stirring bar provided on the friction-type stirring roll. Sprouting is performed by the impact of the collision. When the raw brown rice is 100% by weight, 60 to 95% by weight of the brown rice is sprouting in the vertical friction milling machine.

  As described above, the long grinding body is provided in the vertical grinding mill and the resistance bar and the stirring bar are provided in the vertical friction milling machine. The pressure can be reduced to a low pressure, and it does not depend on the pressure between the grains, but is sprouting only by impact. For this reason, in low-grade brown rice with a high mixing ratio of immature rice and torso-cut rice, the frictional pressure between the grains does not occur, so the ratio of broken rice is half the conventional one to three. It can be drastically reduced.

  According to claim 2, the elongated resistor, the plurality of resistance bars, and the elongated stirring bar are each formed in a prismatic shape, and the corners projecting toward the sperm chambers. Since the part is formed by C chamfering of 0.1 to 0.3 mm, the corners of the resistor, the resistance bar, and the stirring bar are formed at a sharp edge, and the number of times the germ part of brown rice collides with this corner Increases, and the germinated portion of brown rice is repeatedly impacted, so that budding can be performed very easily.

According to a third aspect of the present invention, the milling device includes the saddle type grinding mill as the first machine, the saddle type friction milling machine as the second machine, and the saddle type friction milling machine as three machines. While selecting the number machine and making it a three-unit structure, the whiteness of the raw material discharged from the first machine is increased by about 6 to 11 from the whiteness value of the raw brown rice The protruding amount of the resistor in the semen chamber is set to a predetermined value. Thereby, when the whiteness value when measuring the whiteness of the raw brown rice is 18 to 22 (value measured by the brown rice / milled rice whiteness meter C-300 manufactured by Kett Science Laboratory Co., Ltd.) The protrusion amount of the resistor is set so that the whiteness value when the whiteness of the discharged material is measured is 26 to 29. In other words, if the sperm ratio of the entire sperm apparatus is 100%, the sperm ratio of the first machine is 30 to 50%, the sperm ratio of the second machine is 30 to 40%, and the sperm ratio of the third machine is An approximate value of 10-30% is calculated from the whiteness value. With such a milling ratio, a low-grade brown rice can obtain a refined product with a very high budding rate while suppressing the broken rice rate. On the other hand, when scouring high-grade brown rice made in Japan, etc., if the scouring ratio of the first machine is 40 to 50%, the surface of the grain of rice is damaged, and when cooking rice, the endosperm components leak and become sticky It becomes rice and is not at all suitable as a semen condition.

  According to the fourth aspect of the present invention, the amount of protrusion is set so that the gap between the resistor provided in the finishing chamber of the first machine and the outer peripheral surface of the grinding type whitening roll is 4 to 6 mm, and the second machine And when the gap between the resistance bar and the stirring bar of the third machine is set to 4 to 6 mm, the fineness ratio of the first machine is 30 to 50%, the fineness ratio of the second machine is 30 to 40%, and the third machine Thus, it is possible to realize a polishing apparatus in which the polishing ratio is set to 10 to 30%.

  According to claim 5, since a water adding device is attached to the third machine, in order to reduce the load on the third machine and lower the temperature of the raw material in the milling chamber, Generation can be reduced. Furthermore, the surface of the raw material discharged from the No. 3 machine can be made fine to increase the gloss.

It is a whole block diagram concerning the spermatozoon apparatus of this invention. It is a longitudinal cross-sectional view of the lower feed type vertical grinding type grain refiner constituting the first machine. It is a cross-sectional view which shows a precision part same as the above. It is a general | schematic longitudinal cross-sectional view of the top feed type vertical friction type grain refiner which comprises the 2nd machine and the 3rd machine. It is a cross-sectional view which shows a precision part same as the above. It is an effect | action figure in the milling room of a vertical grinding mill. It is an effect | action figure in the milling room of a vertical friction type grain refiner.

  A mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram relating to a milling apparatus of the present invention, FIG. 2 is a longitudinal sectional view of a lower feed type vertical grinding type grain refiner constituting the first machine, and FIG. FIG. 4 is a schematic longitudinal sectional view of an up-feed type vertical frictional pulverizer constituting the second machine and the third machine, and FIG. 5 shows the same milling part. It is a cross-sectional view.

  The milling apparatus 1 of the present invention is a type in which a plurality of bowl-shaped pulverizers are connected in series, and is configured as a three-unit connection type of the first machine 2, the second machine 3, and the third machine 4 (FIG. 1). reference).

  As an example of the above-described milling device 1, the first machine 2 is a downfeed type vertical grinding mill, the second machine 3 is an upper feed type vertical friction miller, and the third machine 4 is the same as above. It is good to choose each for a feed type vertical friction mill. Here, the grinding-type grain refiner is a grain-refining method in which the surface of the rice grain is rubbed with a file or a grindstone, and the epidermis is shaved. The friction-type grain refiner rubs the rice grains together to peel off the surface skin. Is the method. The second machine 3 and the third machine 4 are respectively provided with blower fans 5 and 6 so as to remarkably promote the removal, and further, the third machine 4 is provided with a moisture adding device 7. Has been. With this configuration, the first machine 2 in the first process increases the friction coefficient of the surface by roughing the surface of the brown rice that is the raw material, and the second machine 3 in the next process promotes the removal by the blower fan 5. However, a sufficient cerealing action can be performed with a relatively light pressure, and in the third machine 4 in the final step, finishing mashing can be performed by adding moisture together with the promotion of dehulling by the blower fan 6.

  And if it is the arrangement | positioning arrangement | positioning of the solidification apparatus of the said milling apparatus 1, since the frictional graining process is arrange | positioned back, excessive pressure will not arise in the early stage of graining, head loss damage of rice grains, It is possible to prevent a plurality of broken rice generation factors such as cracking of the shell due to distortion of rice grains at the early stage of the grain.

  The first machine 2 of the milling apparatus 1 includes a raw material supply port 8 for supplying raw brown rice from the upper part of the machine body, a grinding type grain processing unit 9 for performing grinding grain processing arranged in the center of the machine body, and a side part of the machine body. And a refined product discharge port 10 for discharging the rice grains that have been subjected to the ground grinding process. The discharge chute 11 in which the fine product discharge port 10 is formed is provided with a weight 12 for adjusting the pressing force of the discharge port on the upper portion thereof. An operation panel 13 for the first machine 2 is provided on the side of the machine body that faces the discharge chute 11.

  Next, the second machine 3 includes a raw material supply port 14 extending from the side of the machine body, a friction type grain processing unit 15 that performs friction grain processing disposed in the center of the machine, and a friction type grain refiner disposed on the upper side of the machine body. And a refined product outlet 16 for discharging the rice grains that have undergone the grain processing. A discharge chute 17 in which the fine product discharge port 16 is formed is provided with a weight 18 for adjusting a pressing force of the discharge port on an upper portion thereof. An operation panel 19 for the second machine 3 is provided on the side of the machine body facing the discharge chute 17.

  Further, the third machine 4 includes a raw material supply port 20 extending from the side of the machine body, a friction type grain processing unit 21 that performs friction grain processing disposed in the center of the machine, and a friction type grain refinement that is disposed on the upper part of the machine body. The discharge chute 23 is provided with a refined product discharge port 22 for discharging the processed rice grains, and a weight 24 for adjusting the pressing force of the discharge port is provided at an upper portion of the discharge chute 23 formed with the refined product discharge port 22. The third machine 4 has substantially the same configuration as the second machine 3 except for the water addition device 7. An operation panel 25 for the third machine 4 is provided on the side of the machine body that faces the discharge chute 23.

  Next, the internal structure of the down-feed type vertical grinding mill that will be the first machine 2 will be described with reference to FIGS. 2 and 3, the bottom feed type vertical grinding type grain refiner 2 has a main shaft 26 erected substantially at the center of a main body base 29 by an upper bearing portion 27 and a lower bearing portion 28. A large number of grinding-type whitening rolls 30 are placed immediately above to form an integral whitening roll body 31. A grinding-type debonding wire mesh cylinder 32 is erected around the grinding-type whitening roll 30 through a gap, and a removal cover 33 is attached around the grinding-type demetalization mesh cylinder 32 through the gap. Then, a space between the grinding-type metal strip 32 and the cover 33 is formed in the removal chamber 34, while a space between the grinding-type steel screen 32 and the outer peripheral surface of the grinding-type whitening roll 30 is formed. It is formed in the sperm chamber 35. The support column 36 that supports the grinding type metal strip 32 is provided with a resistor 37 that protrudes toward the finishing chamber 35 and provides resistance to the movement of the grains in the circumferential direction of the grinding type whitening roll 30. The resistor 37 is vertically arranged in a long shape in the axial direction of the main shaft 26.

  An annular collection chamber 38 is formed below the removal chamber 34, and a collection outlet 39 is provided on the bottom surface of the collection chamber 38, and a plurality of scraping blades 40 slide on the bottom surface of the collection chamber 38. The soot accumulated on the bottom surface of the collecting chamber 38 is transferred toward the soot discharge port 39. Then, suction / discharge is performed from the soot discharge port 39 to the collecting fan 42 through the exhaust pipe 41.

  A motor base 43 is attached to the side of the main body base 29 at the lower part of the machine body. A motor 44 for driving the main shaft 26 is fixed to the motor base 43 and a motor pulley is attached to the motor shaft of the motor 44. A V-belt 47 is interlocked and connected between 45 and a drive pulley 46 attached to the main shaft 26 so that the power of the motor 44 can be transmitted to the main shaft 26.

  The grain supply part 48 provided with the said raw material supply port 8 is the cone-shaped guide body which disperse | distributes the grain received from the grain supply cylinder 49 and the grain received from this grain supply cylinder 49 to the circumference direction radially. 50, a cover body 51, and a transport spiral 52 for feeding the grain from the guide body 50 to the scouring chamber 35. The above is the configuration of the bottom feed type vertical grinding mill that is the first machine.

  Next, the internal structure of an up-feed type vertical friction mill that will be the second machine 3 and the third machine 4 will be described with reference to FIGS. 4 and 5. 4 and 5, the top feed type vertical friction type grain refiner 3, 4 has a rotating shaft 55 erected in a cylindrical casing 54 on a main body base 53 so as to be rotatable. The upper feed spiral 56 is axially attached to the lower portion, and the friction type stirring roll 57 is axially attached to the upper portion of the rotating shaft 55. Then, a friction-type metal mesh cylinder 58 that concentrically surrounds the outer periphery of the friction-type stirring roll 57 is erected, and a gap between the friction-type steel-making metal cylinder 58 and the friction-type stirring roll 57 is formed in the polishing chamber 59. It is. In addition, a long stirring bar 57a is formed in the longitudinal direction of the surface of the friction type stirring roll 57, and a blowing hole (not shown) is opened along the stirring bar 57a. Is circulated to the sperm chamber 59 through the hollow rotating shaft 55 and the blast holes. Further, the friction-type debonding wire mesh tube 58 is provided with a plurality of prismatic resistance bars 69 at its inner corners.

  A gap between the friction type metal mesh cylinder 58 and the cylindrical casing 54 is formed in the collecting chamber 60, and a scraper blade 61 connected to the rotating shaft 55 is located at the bottom of the collecting chamber 60. The bottom of the chamber 60 is intermittently scavenged. Further, a suction duct 62 communicates with the collecting chamber 60, and the soot collected by the scooping blade 61 is discharged out of the machine by the suction air of the suction duct 62.

  Above the discharge chutes 17 and 23, there are provided a resistance lid 64 that regulates the discharge of the grains discharged from the outlet 63 and weights 18 and 24 that adjust the pressing force of the resistance lid 64. Reference numeral 65 denotes a conveying spiral that conveys the grain from the raw material supply ports 14 and 20 to the upper feeding spiral 51. The above is the configuration of the top feed type vertical friction type grain refiner that becomes the second machine and the third machine.

  Next, the operation of the sperm making apparatus 1 having the above-described configuration will be described.

  The raw brown rice introduced from the raw material supply port 8 of the milling apparatus 1 is first ground by the abrasive grains of the grinding milling roll 30 on the surface of the rice grain in the first vertical grinding mill 2. . At this time, as shown in FIG. 6, the protrusion amount is set so that the gap L between the resistor 37 and the outer peripheral surface of the grinding-type whitening roll 30 is 5 to 6 mm by the operator's operation of the protrusion amount adjusting handle 66. Sprouting is promoted by the synergistic effect of forming the corner C by chamfering of 0.1 to 0.3 mm. That is, in the milling chamber 35, the raw brown rice is turned into a fluidized state by rotating in the rotational direction r of the grinding-type whitening roll 30, but it is removed by the impact of the germ portion of the brown rice colliding with the resistor 37 in the milling chamber 35. Buds are made. The germination rate further increases with an increase in the number of collisions between the resistor 37 and the germ part of the brown rice. In the vertical grinding mill 2, when the raw brown rice is 100% by weight, 5 to 20% by weight of the brown rice is sprouting.

  The raw material discharged from the refined product discharge port 10 of the vertical grinding type grain refiner 2 is then supplied to the raw material supply port 14 of the vertical type friction type grain refiner 3 of the second machine. In the vertical frictional pulverizer 3, the rice grains are rubbed together to peel off the surface skin. At this time, since the germination is sufficiently performed in the vertical grinding mill 2 of the preceding process, the pressure in the milling chamber of the vertical friction milling machine 3 of the subsequent process can be reduced. That is, as shown in FIG. 7, the protrusion amount is set so that the gap L between the resistance bar 69 and the stirring bar 57a is 5 to 6 mm in the semen chamber 59, and the corners of the resistance bar 69 and the stirring bar 57a are set. Germination is promoted by the synergistic effect of forming part C by chamfering of 0.1 to 0.3 mm. In other words, in the milling chamber 59, the brown rice is agitated by the superposition of the plurality of resistance bars 69 provided at the inner corners of the friction-type debonding wire mesh tube 58 and the stirring bar 57a provided on the friction-type stirring roll 57, so 69. Germination is carried out by the impact caused by the impact of the germ part of brown rice several times on 69. When the raw brown rice content is 100% by weight, 60 to 95% by weight brown rice is sprouted in the vertical friction milling machine 2.

  The raw material discharged from the refined product discharge port 16 of the vertical friction type rice mill 3 is then supplied to the raw material supply port 20 of the third type vertical type rice mill 4. In the vertical friction type pulverizer 4, the rice grains are rubbed against each other in the same manner as described above, and the surface skin is peeled off. However, in the vertical friction type pulverizer 4, mist-like water is added from the water addition device 7 into the cereal chamber, so that the rice grains can be crushed while keeping the temperature of the rice grains low with a low load. And the generation of broken rice can be reduced. Further, the surface of the raw material discharged from the vertical friction type rice mill 4 can be finely made to increase the gloss. Thereby, when the raw brown rice is 100% by weight, 95% by weight of the brown rice can be sprouted in the vertical friction milling machine 4.

  As described above, by providing the long-sized resistor 37 in the vertical grinding type grain refiner 2, and by providing the resistance bar 69 and the stirring bar 57a in the vertical type frictional grain refiner 3, 4, The pressure in the milling chambers 35 and 59 of the pulverizers 2, 3 and 4 can be reduced, and the sprouting can be carried out only by impact, not depending on the pressure between the grains. For this reason, in low-grade brown rice with a high mixing ratio of immature rice and torso-cut rice, the frictional pressure between the grains does not occur, so the ratio of broken rice is half the conventional one to three. It can be drastically reduced.

A milling test was conducted using brown rice from China.
As the raw material varieties, “Soraiku 9031”, which is a Japanese short grain variety “Soraiku 131” produced in 2009, was used. Whiteness was used as a standard for wrinkle accuracy. The whiteness was measured using a brown rice / milled rice whiteness meter C-300 manufactured by Kett Science Laboratory.
Initially, the milling test was performed with a triple-row milling machine equipped with a standard stirring roll and a grain net without the features of the present invention. The results are shown in Table 1 below.

Next, a scouring test was performed using a triple-spinning squeezing device having a sharp-edged elongated resistor 37, a resistor bar 69, and a stirring bar 57a according to the present invention. The results are shown in Table 2 below.

Further, a fine test was conducted when the flow rate was 5 ton / Hr. The results are shown in Table 3 below.

From the results in Table 1, Table 2 and Table 3, when scouring Chinese low-grade brown rice, the whiteness of the raw material discharged from the first machine as shown in Table 2 and Table 3 is the whiteness value of the raw brown rice It was found that when the protruding amount of the resistor 37 is set to a predetermined value so that the whiteness value is increased by about 6 to 11, a refined product having a very high budding rate can be obtained while suppressing the broken rice rate. In terms of the milling ratio, it is important to improve the milling ratio of the first machine in low-grade brown rice, and it is about doubled from 23.8% in Table 1 to 43.4-49.8% in Table 2 and Table 3. Is preferred. On the other hand, when scouring Japanese high-grade brown rice, if the ratio of the scouring machine is 43.4-49.8%, the surface of the grain of rice will be scratched, and when cooked, the endosperm components will leak and become sticky Therefore, it is completely unsuitable as a fine condition.

A milling test was conducted using short grain brown rice from Korea.
As the raw material variety, “No. 5”, which is close to the Japanese short grain variety produced in 2009, was used. The raw brown rice had 22% of cracked grains and 10% of immature grains. Whiteness was used as a standard for wrinkle accuracy. The whiteness was measured using a brown rice / milled rice whiteness meter C-300 manufactured by Kett Science Laboratory.
Initially, the milling test was performed with a triple-row milling machine equipped with a standard stirring roll and a grain net without the features of the present invention. The results are shown in Table 4 below.

Next, a scouring test was performed using a triple-spinning squeezing device having a sharp-edged elongated resistor 37, a resistor bar 69, and a stirring bar 57a according to the present invention. The results are shown in Table 5 below.

  As described above, according to the present invention, the vertical grinding pulverizer is provided with the elongated resistor formed at the sharp edge, and the vertical frictional pulverizer is formed at the sharp edge. By providing the bar and the stirring bar, the pressure in the milling chamber of each grain machine can be reduced, and it does not depend on the pressure between the grains, but is germinated only by impact. For this reason, in low-grade brown rice with a high mixing ratio of immature rice and torso-cut rice, the frictional pressure between the grains does not occur, so the ratio of broken rice is half the conventional one to three. It becomes possible to reduce it.

  Also, the amount of protrusion of the resistor is set so that the whiteness value when the whiteness of the raw material discharged from the first machine is measured is 24 to 33, and the fineness ratio of the first machine based on the whiteness It was found that by scouring with 30 to 40%, it is possible to obtain a refined product with a very high budding rate while suppressing the broken rice rate.

  In addition, the grain refiner of this invention is not restricted to the said embodiment, A various design change is possible.

  The present invention can be applied to grain cereal and grinding of coffee beans.

DESCRIPTION OF SYMBOLS 1 Milling machine 2 First machine 3 Second machine 4 Third machine 5 Blower fan 6 Blower fan 7 Moisture adding device 8 Raw material supply port 9 Grinding grain processing part 10 Fine product outlet

DESCRIPTION OF SYMBOLS 11 Discharge chute 12 Weight 13 Operation panel 14 Raw material supply port 15 Friction grain processing part 16 Fine product discharge port 17 Discharge chute 18 Weight 19 Operation panel 20 Raw material supply port

21 Friction grain processing part 22 Fine product outlet 23 Discharge chute 24 Weight 25 Operation panel 26 Main shaft 27 Upper bearing part 28 Lower bearing part 29 Main body base 30 Grinding type whitening roll

31 Polishing roll body 32 Grinding type wire mesh tube 33 Removal cover 34 Removal chamber 35 Finishing chamber 36 Strut 37 Resistor 38 Collection chamber 39 Soot discharge port 40 Scraping blade

41 exhaust pipe 42 fan for collecting fan 43 motor base 44 motor 45 motor pulley 46 drive pulley 47 V-belt 48 grain supply part 49 grain supply cylinder 50 guide body

51 Cover Body 52 Conveying Spiral 53 Main Body Base 54 Cylindrical Casing 55 Rotating Shaft 56 Upper Feeding Spiral 57 Friction Type Stir Roll 57a Stir Bar 58 Friction Type Strip Metal Net 59 59 Sperm Chamber 60 Collection Room

61 Scraping blade 62 Suction duct 63 Discharge port 64 Resistance lid 65 Transport spiral 66 Protrusion adjustment handle 67 Support cover 68 Spacer 69 Resistance bar

Claims (7)

A vertical grinding machine in which a grinding-type whitening roll is attached to a rotatable main shaft, and a grinding-type demolition wire mesh cylinder is erected around the grinding-type whitening roll through a gap, and the gap is formed in a grinding room. A friction type stirring roll is attached to a rotatable main shaft and a friction type stirring roll is erected around the friction type stirring roll through a gap. A milling apparatus configured by joining together a milled-type friction-type grain refiner,
The column that supports the grinding-type dehulling wire cylinder of the vertical grinding mill is protruded toward the milling chamber and resists movement of the grain by rotating the grinding-type whitening roll in the circumferential direction. A long resistor to be applied is provided, and a plurality of resistance bars are provided in an inner corner portion of the frictional type wire milling net cylinder of the vertical friction type grain refiner. In the longitudinal direction of the friction stirrer roll, a long stirrer bar that provides resistance to the movement of the grain is superimposed on the plurality of resistance bars by rotating the frictional stirrer roll in the circumferential direction. A low-grade brown rice milling apparatus characterized by comprising.   The long resistor, the plurality of resistance bars, and the long stirring bar are each formed in a prismatic shape, and the corners projecting toward the semen chamber are 0.1 to 0.3 mm. The low-grade brown rice milling apparatus according to claim 1, which is formed by C chamfering.   The milling apparatus selects the bowl grinding machine as the first machine, the bowl friction machine as the second machine, and the bowl friction machine as the third machine. While the three-seat structure is used, the raw material discharged from the first machine has a whiteness value of about 6 to 11 higher than the whiteness value of the raw brown rice. The low-grade brown rice milling apparatus according to claim 1, wherein the protrusion amount is set to a predetermined value.   The amount of protrusion is set so that the gap between the resistor provided in the finishing chamber of the first machine and the outer peripheral surface of the grinding type whitening roll is 4 to 6 mm, and the resistance of the second machine and the third machine The low-grade brown rice milling apparatus according to claim 3, wherein a gap between the bar and the stirring bar is set to 4 to 6 mm.   The low-grade brown rice milling device according to claim 3 or 4, wherein the third machine is provided with a water addition device. A vertical grinding machine in which a grinding-type whitening roll is attached to a rotatable main shaft, and a grinding-type demolition wire mesh cylinder is erected around the grinding-type whitening roll through a gap, and the gap is formed in a grinding room. A friction type stirring roll is attached to a rotatable main shaft and a friction type stirring roll is erected around the friction type stirring roll through a gap. A vertical friction type pulverizer, wherein the vertical grinding type pulverizer is the first machine, the vertical friction type pulverizer is second machine, In the milling method for low-grade brown rice in the milling machine with the three-unit configuration selected as the third machine,
The first machine is supplied with raw brown rice having a whiteness value of 18 to 22, and the raw material having a whiteness value of 26 to 29 is discharged. Next, fine adjustment is performed by adjusting the gap between the resistance bar and the stirring bar provided in the fine adjustment chamber so that the raw material having a whiteness value of 34 to 38 is discharged from the No. 2 machine. A method for scouring low-grade brown rice in a pulverizer for performing scouring by adjusting a gap between a resistance bar and a stirring bar provided in the sericulture chamber so that a refined product having a degree value of 38 to 42 is discharged.   The amount of protrusion is set so that the gap between the resistor provided in the finishing chamber of the first machine and the outer peripheral surface of the grinding type whitening roll is 4 to 6 mm, and the resistance of the second machine and the third machine The method for milling low-grade brown rice in a grain refiner according to claim 6, wherein the milling is carried out by setting the gap between the bar and the stirring bar to 4 to 6 mm.

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