JPH0657323B2 - Flakes manufacturing mill - Google Patents

Description

FIELD OF THE INVENTION This invention relates to mills, particularly from processed grains such as corn, wheat or rice to flakes.
e; a mill for producing thin flakes), and a roll for use in such a flake producing mill.

Prior Art and Problems to be Solved In the production of cereal flakes, the grains processed with the additive are in the form of pellets having a size of about 3/16 inch (4.8 mm), Threaded, about 0.01
Flakes with a thickness of 5 inches (0.4 mm) and a diameter of about 1 itin (25.4 mm) are produced. Grain pellets are preferably formed into flakes of uniform thickness for subsequent processes such as baking, and some hard pellets also require large external forces (100,000 pounds "45, 45
(Roll holding force of 350 kg or more) is required, and the sandwiching size between the flake making rolls must be controlled accurately. Moreover, the flake manufacturing process generates a significant amount of heat which must be removed to satisfactorily produce cereal flakes of the desired quality and uniformity.

Solution to the Problem One aspect of the present invention is to provide a roll mill having opposed side frames. Between the side frames, a pair of rolls rotatably attached with a means for driving the pair of rolls in opposite directions, and a guide means for milling the feed material under pressure between the rolls,
And means for collecting the milled product located below the roll. Each roll has a single through shaft, and a pair of coaxial sleeves are attached to the shaft, and a coolant flow path is provided between the sleeves. Desirably, the outer sleeve is a hard metal and the structure forming the helical coolant passage is located between the two sleeves. Therefore, the coolant inlet at one end of the penetrating shaft communicates with the spiral flow passage, and the coolant outlet at the other end of the penetrating shaft also communicates with the spiral coolant flow passage. Further, it is desirable to have a specific gravity between the shaft and the set of coaxial sleeves that is less than the specific gravity of the shaft or sleeve (in particular embodiments, expanding aggregate "exanding aggregate").
Of non-metallic materials.

In a preferred embodiment, the shaft of one roll (fixed roll) is fixed at a proper position, and the other roll (movable roll) can be moved toward and away from the above-mentioned one roll so that the pressure between the two rollers is reduced. The size of the part can be changed. The adjusting mechanism has a double-acting hydraulic cylinder attached to the fixed frame member, and also has a rod fixed to the auxiliary roll supporting frame, and detects the position of the rod to accurately position the movable roll with respect to the fixed roll. It supports a transducer that makes

In a specific embodiment, each roll is 26 inches (660.4 mm)
And a total length of about 40 inches (1016 mm),
Also, an outer sleeve (having a hardness of 50 or more on the Rockwell C scale) of through-hardening alloy steel, a steel inner sleeve, and a pair of inner spirals bounded by the steel inner sleeve. And a cooling channel. The coolant is caused to flow in a turbulent state (Reynolds number of 2000 or more) through the cooling channel. An adjustable angle vane with vibration drive is associated with each roll. In this system, 40
A roll picking pressure of about 250,000 pounds (113.375 Kg) is applied over a length of inch (1016 mm) and the eccentricity of each roll is less than 1/2000 inch (0.013 mm).
The mill produces high quality grain flakes of uniform thickness from the treated grain pellets.

Other features and advantages of the present invention are shown in connection with the drawings as a course of the specific embodiments described below.

EXAMPLE As shown in FIGS. 1-3, the flake making mill has two heavy load bearing side frames 10, 12 (7 inches "17").
8 mm "thick solid hot rolled steel)
The flake-making rolls 14 and 16 are provided between 12 (about 26 each).
Inch "660mm" diameter and 40 inch "1016m"
m ") is attached. Each side frame 10, 12 has a base 18, which is 1
It is attached to the concrete pedestal 20 via a 5/6 inch (8 mm) thick vibration absorbing pad. The grain pellets to be flaked are fed to the feeding chute 24 and flow to the pressure portion between the rolls 14 and 16, and the flaked products are discharged onto the transfer conveyor arranged between the pedestals 20.

The rolls 14 and 16 are AC motors 30 each having 100 horsepower.
Driven by (see FIGS. 1, 2 and 3), each motor 30 is connected to a corresponding roll 14, 16 via a high torque drive belt 32 and a shaft attached to a speed reducer 34. The rotation speed of each roll 14, 16 is the gear 36
(See FIGS. 1, 3, and 6) and a magnetic pickup that cooperates with it. Each roll 14, 16
Adjustable angle adjusting blade 40 (see FIGS. 2 and 6)
Are arranged in association with each other, and each blade 40 is mounted so as to be rotatable with respect to the shaft 38 and whose rotational position can be controlled by an air cylinder 42. The two blades 40 are drive means 4
4 and a cam 46 (see FIGS. 1 and 3) vibrate to make an axial movement of about 1/8 inch (3.2 mm).

As shown in FIG. 4 and FIG. 5, each flake manufacturing roll is
It has a steel shaft 60, which has an outer diameter of 12 inches (30
5 mm) of the body portion 62. The body portion 62 includes an inner sleeve 64 (outer diameter 22 inch "559 mm" and thickness
1.25 inches "31.8 mm") is fixed through the end plate 66,
The end plate 66 is welded to the body portion 62 and the sleeve 64. The space between the shaft 60 and the sleeve 64 is filled with Por-rok expanded aggregate 68, which has been corrected in a few days and expanded by about 0.3%,
It becomes a rigid composite roll base of the shaft 62, the sleeve 64, the end plate 66 and the aggregate 68. Subsequently, on the outer surface of the sleeve 64, a series of four steel plates 72 (each having a cross section of 3/8 in width) is formed.
Inch "9.5mm", vertical half inch "12.7mm")
1.5 inch (38.1 mm) pitch and 6 inch (152.4 mm)
It is spirally welded with the lead of. The outer surface of the spiral plate 72 is the outer diameter It is accurately processed to (569.9mm). The outer sleeve 74 is a forged No. 4150 steel alloy and has an outer diameter of about 26 inches (660.
4mm) and thickness (45.2 mm), Rockwell C Scale 58-64
It has been hardened to a hardness of about 1.015-0.020 inch (0.38-0.51m
m) The "tightness" is given. This creates four helical coolant circulation grooves 76 between the inner surface of the cured outer sleeve 74 and the outer surface of the inner sleeve 64. A ring 78 is also welded to each end of the inner sleeve 64 and an end disk 80 is welded to the shaft 60 to provide a seal with the outer sleeve 74. Outer sleeve 74 and end disc 8
The 0 connection is sealed by an O-ring 82 and a cap plate 84 with a thermal insulator 86 is placed on the end plate 80.

Formed at each end of each shaft 60 is a coolant flow path, which has one axial flow path 90 and four radial flows extending into the region between the end plates 66, 80 having a ring 78. The radial flow path 92 is formed. This limits the flow between those areas and the inlet and outlet of the coolant channel 76. A tapered surface 94 is formed on the outer surface of the shaft 60 on both sides of the body portion 62, and a spherical roller bearing assembly 96 (SKF-23248K) is assembled to this surface 94 and fixed by a ring nut 98. . Seal plates 100 and 102 (see FIG. 6) are split seals 10.
4 and protects the bearing 96.

Referring to FIGS. 1, 3 and 6, the coolant is at the inlet 11
0, the shaft inlet passage 9 through the rotary coupling 112
It flows at a rate of 100 gallons per minute (a little less than 380) to 0, forming turbulence in the flow path 76 for cooling the rolls 14,16. Then, it is discharged from the opposite end of the shaft 60 through the coupling 114 and the conduit 116.

The bearing assembly 96 of the roll 16 is the auxiliary frame member 1
Mounted within 20, the frame member 120 has the same thickness as the side frames 10,12. Two half inch (12.7 mm) thick side retaining plates 122, 124 are welded to each auxiliary frame 120.
22 and 124 extend downward on both sides of the main frame members 10 and 12 and are supported by pivots 126. The pivot 126 is press-fitted into the side frames 10 and 12, respectively, and constitutes a pivot about 17 inches (432 mm) below the axis of the roll 16. The pivot 126 is hollow and the adjustment vane shaft 38
Pass through these pivots 126. Auxiliary frame 1
At the upper end of 20, a lateral pivot 130 is attached to the clamp member 12.
8 is fixed and the pivot 130 is located about 20 inches (508 mm) above the axis of the roll 16, thereby providing a slightly greater mechanical effect than in the 2: 1 case. As shown in FIG. 1, an electromagnetic hydraulic servo actuator unit 134 (made by Aenoqoip LESAI) is arranged on the bracket portion 132 on the top of the side frame members 10 and 12, and this unit 134 is arranged around the axis 126 of the pivot 126. It is mounted to rotate. Each actuator unit 13
No. 4 has a servo cylinder having a hole with a diameter of 7 inches (178 mm), and a double-acting piston is arranged in the cylinder with a stroke of 5 inches (127 mm).
One sonic probe in each hydraulic cylinder unit 134 monitors the position of the piston, providing position determination and repeatable positioning accuracy within 0.0001 inches (2.5 mm of 1000). Piston rod 138 extends into bore 142 in auxiliary frame 120 and through transverse axis 130,
The auxiliary frame 120 is connected to the actuator cylinder unit 134. Two cylinder units 134
Can be controlled individually, so that the necessary correction can be performed even when the rolls 16 are non-parallelly arranged and the product is fed unevenly. The particular roll-to-roll gap is selected by the operator's adjustable thumbwheel switch, which allows the operator to move the pair of rolls together or individually in small increments. Whenever the system shuts down, the servo cylinder-134 moves the roll 16 to the maximum separation position,
When the system is loaded again, the roll 16 is moved to the initial position specified by the servo cylinder controller.

While particular embodiments of the present invention have been illustrated and described, it will be obvious to those skilled in the art that various modifications can be made and thus the invention is not limited to the disclosed embodiments or details. However, various applications are possible within the spirit and scope of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view of a grain flake manufacturing mill according to the present invention,
FIG. 2 is a front view of an end portion of the flake manufacturing mill shown in FIG. 1, and FIG.
Fig. 1 is a side view of the flake making mill of Fig. 1, and Fig. 4 is the first.
FIG. 5 is a partially cut front view of a flake manufacturing roll used in the flake manufacturing mill shown in FIG. 5, FIG. 5 is a cross-sectional view taken along line 4-4 in FIG. 4, and FIG. 6 is a movable flake manufacturing mill shown in FIG. FIG. 6 is an enlarged cross-sectional view showing a pivot and a bearing support for a roll. 10, 12 ... Side frame, 14, 16 ... Flake manufacturing roll, 18 ... Base, 30 ... AC motor, 40 ... Angle adjusting blade, 60 ... Shaft, 62 ... Main body part, 64 ... Inner sleeve, 66 ... End plate, 68 ... Aggregate, 72 ... Helical plate, 74 ... Outer sleeve, 76 ... Helical coolant circulation groove, 80 ... End disc, 84 ... Cap plate , 90 ... axial coolant channel, 92 ... radial coolant channel, 96 ... spherical roller bearing assembly, 100, 102 ... seal plate, 120 ... auxiliary frame, 122, 124 ... hide plate , 126, 130 ... Axis, 128 ... Clamping member, 134 ... Servo actuator unit, 138 ... Piston rod.

Claims (11)

[Claims] 1. A first and a second flake-making roll, each roll comprising a penetrating shaft and a coaxial inner and outer sleeve structure fixed to the penetrating shaft and between the coaxial sleeves. And a structure for forming a spiral coolant flow path arranged in contact with the flakes, wherein the outer surface of the outer sleeve structure forms a milling surface coaxial with the axis of the penetrating shaft. A frame structure that rotatably supports the flake-making rolls around two parallel axes and forms a concavity portion through which the material to be flaked passes; a means for rotationally driving each roll; A flake manufacturing mill comprising: a means for cooling the milling surface of the roll by causing a coolant to flow through the coolant flow path of the roll. 2. The flake manufacturing mill according to claim 1, wherein each of the outer sleeves is through-hardened to a hardness of at least 50 on the Rockwell C scale. 3. The cross-sectional area of the coolant channel between the coaxial sleeves of each roll is about 10 cm ² and the outer sleeve structure is a solid metal having a thickness of about 3 cm and a diameter of about 50 cm. The flake manufacturing mill according to claim 1 or 2, which is a grain. 4. Means for flowing coolant through the rolls comprises:
The flake manufacturing mill according to any one of the first to third aspects, wherein the coolant is caused to flow in a turbulent state (Reynolds number of 2000 or more) through the coolant channel. 5. Each roll is a composite rigid structure having a non-metallic material that fills a region between the through shaft and the inner sleeve, the non-metallic material being lower than any metal of the coaxial sleeve. The flake manufacturing mill according to claim 1, which has a density. 6. A flake making mill according to claim 5 wherein the cross-sectional area of said non-metallic material is greater than the cross-sectional area of either said shaft or said outer sleeve. 7. A structure for forming a coolant flow path between the coaxial sleeves of each roll has a plurality of spiral metal members welded to an outer surface of the inner sleeve, and the outer sleeve has the spiral structure. 7. A flake according to any one of claims 1 to 6, which is tightly fitted to a spiral metal member, and wherein a plurality of spiral coolant channels are formed by the spiral metal member between the inner and outer sleeves. Manufacturing mill. 8. The frame structure includes a first frame structure for mounting one of the rolls at a fixed position and another of the rolls for rotatably mounting about one pivot parallel to the rotation axis of each roll. A second frame structure, wherein a pivot of the second frame structure is arranged radially outward and downward of the other roll, and the second frame structure is moved. The flake manufacturing mill according to any one of items 1 to 7, which comprises a hydraulic system that can be individually controlled to adjust the size of the pressure portion of each roll. 9. The flake making mill of claim 8 wherein said hydraulic system exerts a force of at least 3000 pounds per linear inch (536 kg per linear cm) on the constricted portion of each roll. 10. A double-acting hydraulic cylinder mounted on the first frame structure, wherein each hydraulic system has one piston rod fixed to the second frame structure, and the hydraulic cylinder. 10. A flake making mill according to claim 8 or 9, further comprising a transducer connected to the sensor in a feedback relationship to detect the position of the rod and accurately position the movable roll with respect to the fixed roll. 11. An adjusting vane structure for cleaning each of said rolls, said adjusting vane structure being associated with said other roll mounted for rotational movement about a pivot of said second frame structure. The flake manufacturing mill according to any one of items 8 to 10.