JP3547172B2 - Cylindrical extrusion granulator - Google Patents

Description

[0001]
[Industrial applications]
TECHNICAL FIELD The present invention relates to a cylindrical extrusion granulator for granulating a kneaded product into a column having a predetermined length in a manufacturing process of granules, powders, and the like.
[0002]
[Prior art]
Generally, in a manufacturing process of granules and powders, a kneaded product obtained by kneading a powder and a liquid is once granulated into a cylindrical shape by a cylindrical extrusion granulator, and the granulated granules are dried. Has been done. The configuration of a conventional cylindrical extrusion granulator will be described with reference to FIG.
[0003]
In FIG. 4, a conventional cylindrical extrusion granulation apparatus 1 includes a kneaded material supply pipe 2 for supplying a kneaded material from a kneaded material manufacturing device or the like (not shown), and a supplied kneaded material. Hopper 3 for accommodating therein, a cylindrical extruding portion 4 provided below the hopper 3, a turntable 5 provided below the cylindrical extruding portion 4 and rotating in a predetermined direction (for example, clockwise), and a table 5. A guide wall 6 provided on the outer peripheral portion of the device, and a screver 7 for discharging the granulated material in a predetermined direction. The cylindrical extruding section 4 includes a cylindrical punching plate 41 having a large number of openings 42 of a predetermined size provided on an outer peripheral surface thereof, and a screw (not shown) that rotates with a predetermined gap from an inner peripheral surface of the punching plate 41. )). By the rotation of the screw, the kneaded material between the punching plate 41 and the screw is extruded from the opening 42 to the outside of the punching plate 41, and a columnar kneaded material is formed. The cylindrical kneaded material extruded from the punching plate 41 is cut into an appropriate length by its own weight, and falls on the turntable 5. The columnar kneaded material (columnar granulated material) that has fallen on the turntable 5 is conveyed while being guided by the guide wall 6 so as not to drop from the turntable 5, and is moved at a predetermined position by the screver 7. From above, it falls onto a vibration conveyor (not shown) or the like, and is conveyed to the next drying step or the like.
[0004]
For example, when manufacturing granules, the size of the opening 42 of the punching plate 41 is about 0.4 to 1.2 mm in diameter. Depending on the compaction (density) of the kneaded material from which the granules are formed, when the diameter of the opening 42 is small (for example, about 0.5 mm), the kneaded material extruded from the punching plate 41 is cut by its own weight. Thus, for example, a columnar granule of about 10 to 20 mm is formed.
[0005]
[Problems to be solved by the invention]
However, depending on the type and purpose of the granule, a granule having a high particle strength may be required, and in such a case, a kneaded product having a high compaction is used. However, when the kneaded material having a high compaction is extruded from the punching plate 41 using a cylindrical extrusion granulator, it is not cut into a columnar shape having an appropriate length depending on its own weight, and as shown in FIG. Extend for a long time. Therefore, the operator must accompany the cylindrical extrusion granulator, cut the noodle-like kneaded material 50 extruded from the punching plate 41 into an appropriate length, and equalize the discharge amount to the transport device and the drying device. There was a problem that it did not become.
[0006]
Further, it is difficult to cut the extruded kneaded material short and uniformly by a manual operation by an operator, and in general, the length of the cut columnar granule 50 is longer than a predetermined length. And non-uniform. However, long granules tend to aggregate as a lump and fall from the turntable 5 as intermittent lumps onto a vibrating conveyor or the like. As a result, there has been a problem that the supply of the granulated material to the next drying step or the like becomes non-uniform, which causes poor flow in the whole manufacturing process. In addition, the aggregated granules have a problem that heat is hardly transmitted to the inside, which causes poor drying. Further, the granules having poor drying adhere to a wall surface of an apparatus, a basket, or the like in a process subsequent to the drying process, which causes a problem that the manufacturing process must be stopped for cleaning.
[0007]
The present invention has been made in order to solve the problems of the conventional example as described above, and even when a kneaded material having a high compaction is used, an extruded kneaded material having a uniform length is obtained. It is an object of the present invention to provide a cylindrical extrusion granulation apparatus provided with a granule cutting device for cutting into columnar granules.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a cylindrical extrusion granulation apparatus of the present invention includes a substantially cylindrical punching plate provided with a plurality of openings of a predetermined size on an outer peripheral surface, and a predetermined distance from an inner peripheral surface of the punching plate. A screw that rotates with a gap therebetween, and a cylindrical extrusion unit for extruding a kneaded material between the punching plate and the screw from the opening to the outside of the punching plate by rotation of the screw,
A plurality of cuts are provided near the outer peripheral surface of the punching plate, and cut the kneaded material extruded from the opening into cylindrical granules of a predetermined length by moving a predetermined range along the outer peripheral surface. And a cutter.
Before SL cutter, a rotary shaft coaxial with the screw and the rotation shaft, that is held at equal intervals in an annular member provided on the outside of the cylindrical punched plate.
Before SL annular member suspended from the upper portion of the cylindrical extrusion unit, you reciprocally rotated a predetermined angle at a predetermined speed.
Before SL cutter, so as to cross substantially at right angles to the contact of the extruded hanging kneaded material by gravity from said aperture, that is fixed to the annular member to form a predetermined angle relative to the vertical.
Before Symbol cutter is a double-edged, that have been made by either of alloy steel, was selected from hard plastic and ceramic.
In the above SL configuration, the annular member is preferably driven by the reciprocating motion of the air cylinder piston.
[0009]
[Action]
According to the cylindrical extrusion granulator of the present invention configured as described above, the kneaded material existing between the screw and the punching plate is provided on the outer peripheral surface of the punching plate by the rotation of the screw of the cylindrical extrusion unit. Extruded from the hole, a columnar kneaded product having a cross section substantially equal to the shape of the opening is formed. By moving a cutter provided in the vicinity of the outer peripheral surface of the punching plate in a predetermined range along the outer peripheral surface at a predetermined speed, the kneaded material extruded from the opening is cut into a predetermined length, thereby forming a cylindrical shape. Granules are formed. By moving the cutter intermittently and controlling the stop time, a columnar granule of an arbitrary length is formed.
[0010]
By holding the cutters at equal intervals on an annular member provided on the outside of a cylindrical punching plate whose rotation axis is coaxial with the rotation axis of the screw, the movements of all the cutters could be aligned and the cut was performed. The length of the columnar granules becomes uniform. In addition, by suspending the annular member from the upper portion of the cylindrical extruding portion, the cut cylindrical granules do not adhere to the drive mechanism of the annular member or clog the gap, so that the annular member and the cutter can be driven smoothly. become. Further, by rotating the annular member back and forth within a predetermined angle range, there is no interference (collision) with the kneaded material supply pipe generally provided above the cylindrical extrusion unit.
[0011]
The cutter is fixed to an annular member at a predetermined angle with respect to the vertical so as to make contact with the cross section of the kneaded material which is extruded from the opening and hangs down by its own weight, so as to contact the cross section substantially at right angles. The end faces of the granules are at right angles, and there are not many fragments of the granules during cutting. Further, by using a double-edged cutter, it is possible to cut the columnar granules in any case of reciprocating rotation of the annular member. In addition, by setting the material of the cutter to any one selected from stainless steel, hard plastic and ceramic, no rust or the like is generated and sanitation is achieved. In addition, by driving the annular member by reciprocating motion of the piston of the air cylinder, it is possible to correspond to the thickness of the cylindrical kneaded material to be cut and the degree of compaction, and the motor is compared to the case where a motor is used. No troubles such as burnout occur, and the operation is performed smoothly.
[0012]
【Example】
A cylindrical extrusion granulator of the present invention will be described with reference to FIGS. 1 to 3 showing a preferred embodiment thereof. FIG. 1 is a perspective view showing the configuration of a preferred embodiment of a cylindrical extrusion granulating apparatus, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a cylindrical extrusion granulating apparatus shown in FIG. It is a perspective view which shows operation | movement.
[0013]
As shown in FIGS. 1 and 2, a cylindrical extrusion granulator 1 of this embodiment includes a kneaded material supply pipe 2 for supplying a kneaded material from a kneaded material manufacturing device or the like (not shown). A hopper 3 for accommodating the supplied kneaded material, a cylindrical extruding portion 4 provided below the hopper 3, and a rotatable member provided below the cylindrical extruding portion 4 and rotated in a predetermined direction (for example, clockwise). A turntable 5, a guide wall 6 provided on an outer peripheral portion of the table 5, a screver 7 for discharging granules in a predetermined direction, and a uniform length of the extruded kneaded material. The apparatus includes a granule cutting device 10 for cutting into columnar granules.
[0014]
The granule cutting device 10 includes an annular member 11 suspended from an upper portion of the cylindrical extruding section 4 via an arm 13, a plurality of cutters 12 held at equal intervals by the annular member 11, and an arm 13. It has a bearing portion 14 for rotatably holding the annular member 11 and a drive mechanism 15 for reciprocatingly rotating the annular member 11. As shown in FIG. 2, the driving mechanism 15 uses the air cylinder 16 as an actuator, and reciprocates (rotates) the annular member 11 by reciprocating (expanding and contracting) motion of the piston 17. In order to prevent the arm 13 from interfering (colliding) with the kneaded material supply pipe 2, in this embodiment, the reciprocally rotatable angle range of the annular member 11 is limited to 120 degrees or less, more specifically, 60 degrees or less. Is done.
[0015]
As shown in FIG. 2, the cylindrical extruded portion 4 is formed by separating a predetermined gap from a cylindrical punching plate 41 having a large number of openings 42 of a predetermined size provided on an outer peripheral surface thereof and an inner peripheral surface of the punching plate 41. And a second screw 44 for supplying the supplied kneaded material in a vertically downward direction between the first screw 43 and the punching plate 41. By the rotation of the first screw 43, the kneaded material between the punching plate 41 and the first screw 43 is extruded from the opening 42 to the outside of the punching plate 41, and a columnar kneaded material 45 is formed. .
[0016]
The cylindrical kneaded material 45 extruded from the punching plate 41 hangs down by its own weight. The cutter 12 is fixed to the annular member 11 by a bolt 18 or the like so as to make a predetermined angle (for example, about 45 to 60 degrees) with respect to the vertical so as to make contact with the cross section of the hanging kneaded material 45 at substantially right angles. I have. As a result, the cut end faces of the columnar granules 46 are at a right angle, and few pieces are generated during cutting. As described above, since the rotatable angle of the annular member 11 is limited to 60 degrees or less, it is preferable to appropriately select the number of the cutters 12 in the range of 10 to 20.
[0017]
The kneaded product granulated by the present apparatus is generally a pharmaceutical, an agricultural chemical, a fertilizer, a feed (pet food), or the like. Therefore, in consideration of hygiene, it is preferable to select the material of the cutter 12 from alloy steel such as stainless steel and Ni steel, and hard plastics and ceramics and other materials that do not generate rust. Further, it is preferable that the cutter 12 has two blades so that the columnar granule 46 can be cut in any case of the reciprocating rotation of the annular member 11.
[0018]
Although it depends on the purpose of the granules, it is preferable to cut the granules into a length of, for example, about 3 to 50 mm in consideration of the flow of the columnar granules after cutting. Therefore, the cutter 12 (or the annular member 11) is driven intermittently according to the cutting length. The length of the kneaded material 45 extruded while the cutter 12 is stopped substantially corresponds to the length of the cut columnar granules 46.
[0019]
Next, the operation of this embodiment will be described. As shown in FIGS. 2 and 3, the cylindrical kneaded material 45 extruded from the punching plate 41 of the cylindrical extruding part 4 is cut into a predetermined length by the cutter 12, and the cut cylindrical granulated material is cut. 46 falls on the turntable 5. As shown in FIG. 3, the columnar granules 46 are conveyed while being guided by the guide wall 6 so as not to drop from the turntable 5, and are vibrated from the turntable 5 at a predetermined position by the screver 7 (shown in FIG. 3). ) And transported to the next drying step. Here, the cut columnar granules 46 have a length in a predetermined range (for example, 3 to 50 mm) and are substantially uniform. Also, depending on the type and purpose of the granules, even when a kneaded material having a high compaction is used, the columnar kneaded material 45 extruded from the punching plate 41 is forcibly cut to a predetermined length by the cutter 12. However, it does not extend long like a noodle like the conventional example shown in FIG. Therefore, there is no need for the operator to attend the cylindrical extrusion granulation apparatus, nor to cut the noodle-like kneaded product extruded from the punching plate 41 into an appropriate length.
[0020]
Further, since the cut columnar granules 46 are relatively short in length and substantially uniform, they do not aggregate into a lump and are placed on a continuous vibration conveyor or the like from the turntable 5. To fall. As a result, the supply of the granulated material to the next drying step and the like becomes uniform, and flow failure and drying failure do not occur in the entire manufacturing process. Further, in a process subsequent to the drying process, there is no need to stop the manufacturing process for cleaning without adhering to a device wall surface, a basket, or the like.
[0021]
In the above-described embodiment, the case where the cutter 12 is fixed to the annular member 11 suspended from the upper part of the cylindrical extruding portion 4 and the annular member 11 is driven so as to reciprocate is illustrated. The same effect can be obtained by holding the annular member 11 from the side of the hopper 3 or the cylindrical extruding portion 4 and driving the annular member 11 to rotate continuously in a predetermined direction so as not to interfere with the second member 2. Further, the actuator is not limited to the air cylinder 17, and a servo motor or an inverter (induction motor) may be used.
[0022]
【The invention's effect】
As described above, according to the present invention, by the rotation of the screw of the cylindrical extrusion unit, the kneaded material existing between the screw and the punching plate is extruded from the opening provided on the outer peripheral surface of the punching plate, and the shape of the opening A cylindrical kneaded material formed so as to have a cross section substantially equal to the above, a cutter provided in the vicinity of the outer peripheral surface of the punching plate is moved in a predetermined range along the outer peripheral surface to a predetermined length. Since the cutting is performed to form the columnar granules, the cutter can be intermittently moved and the stop time thereof can be controlled to form the columnar granules of an arbitrary length. .
[0023]
In addition, by holding the cutters at equal intervals on an annular member provided outside a cylindrical punching plate whose rotation axis is coaxial with the rotation axis of the screw, the movements of all the cutters can be aligned, and cutting can be performed. The length of the formed columnar granules can be made uniform. In addition, by suspending the annular member from the upper part of the cylindrical extruding portion, the cut cylindrical granules do not adhere to the drive mechanism of the annular member or clog the gap, and smoothly drive the annular member and the cutter. can do. Further, by reciprocating the annular member within a predetermined angle range, it is possible to prevent interference (collision) with the kneaded material supply pipe generally provided at the upper part of the cylindrical extruding part.
[0024]
By fixing the cutter to an annular member at a predetermined angle to the vertical so as to make contact with the cross section of the kneaded material which is extruded from the opening and hangs down by its own weight, at a substantially right angle, a cut cylindrical product The end faces of the granules can be made square, and less pieces of the granules are generated during cutting. Further, by using a double-edged cutter, it is possible to cut the columnar granules in any case of reciprocating rotation of the annular member. Further, by setting the material of the cutter to any one selected from stainless steel, hard plastic and ceramic, it is possible to sanitize without generating rust or the like. In addition, by driving the annular member by reciprocating motion of the piston of the air cylinder, it is possible to cope with the thickness of the cylindrical kneaded material to be cut and the degree of compaction, and the motor is compared with the case where a motor is used. Troubles such as burnout can be prevented.
[0025]
Also, depending on the type and purpose of the granules, even when using a kneaded material having a high compaction, the cylinder-shaped kneaded material extruded from the punching plate is forcibly cut to a predetermined length by a cutter. It does not extend long like a noodle and does not require the operator to attend the cylindrical extrusion granulator. Further, it is not necessary to cut the noodle-like kneaded product extruded from the punching plate into an appropriate length. Furthermore, the cut columnar granules have a relatively short length and are almost uniform, so they do not aggregate into a lump, and the supply of the granules to the next step becomes uniform, No flow failure or drying failure occurs in the entire manufacturing process. Further, in a process subsequent to the drying process, there is no need to stop the manufacturing process for cleaning without adhering to a device wall surface, a basket, or the like.
[Brief description of the drawings]
1 is a perspective view showing the configuration of a preferred embodiment of a cylindrical extrusion granulation apparatus of the present invention; FIG. 2 is a side sectional view of FIG. 1; FIG. 3 is a cylindrical extrusion granulation apparatus shown in FIG. FIG. 4 is a perspective view showing the configuration of a conventional cylindrical extrusion granulation apparatus. FIG. 5 is a perspective view showing the operation of a conventional cylindrical extrusion granulation apparatus when a kneaded material having a high compaction is extruded. Perspective view showing [Description of reference numerals]
1: Cylindrical extrusion granulation apparatus 2: Kneaded material supply pipe 3: Hopper 4: Cylindrical extrusion section 5: Turntable 6: Guide wall 7: Scraver 10: Granulated material cutting apparatus 11: Annular member 12: Cutter 13: Arm 14: Bearing part 15: Drive mechanism 16: Air cylinder 17: Piston 18: Bolt 41: Punching plate 42: Opening 43: First screw 44: Second screw 45: Columnar kneaded material 46: Columnar Granulated product 50: Noodle-like kneaded product

Claims (2)

A substantially cylindrical punching plate provided with a plurality of apertures of a predetermined size on the outer peripheral surface and a screw that rotates with a predetermined gap from the inner peripheral surface of the punching plate, and the screw rotates to rotate the screw. A cylindrical extrusion unit for extruding the kneaded material between the punching plate and the screw from the opening to the outside of the punching plate,
A plurality of cuts are provided near the outer peripheral surface of the punching plate, and cut the kneaded material extruded from the opening into cylindrical granules of a predetermined length by moving a predetermined range along the outer peripheral surface. With a cutter ,
The cutter has a rotation axis that is coaxial with the rotation axis of the screw, and is held at equal intervals by an annular member provided outside the cylindrical punching plate,
The annular member is suspended from the upper part of the cylindrical extruded portion, reciprocatingly rotates at a predetermined angle at a predetermined speed,
The cutter is fixed to the annular member so as to make a predetermined angle with respect to the vertical so that the cutter is substantially perpendicular to the cross section of the kneaded material that is extruded from the opening and hangs down by its own weight,
The cylindrical extruder is a double-edged cutter made of any one of alloy steel, hard plastic, and ceramic . It said annular member is cylindrical extrusion made particle device according to claim 1, wherein which is driven by the reciprocating motion of the air cylinder piston.

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