JPH04210222A - Cutting formation for granulated material in extruding granulator and device - Google Patents

Abstract

PURPOSE:To produce the granulated material of granules by a simple mechanism by introducing the kneaded material into the inside of a cylinder bored with punching holes and extruding it on a chute through the punching holes by an extrusion blade and cooling it by ventilation and thereafter cutting it by a cutter. CONSTITUTION:When the kneaded material (a) is introduced into the inside of a cylinder 1 and an extrusion blade 3 is rotated, the granulated material (b) formed into a noodle shape by punching holes 2 is extruded and falls on a chute 4. In this case, the granulated material (b) is heated at about 60 deg.C by frictional heat at a time of extrusion and stickiness is made higher. Then, air is blown against the granulated material (b) through the ventilation holes 8 bored to the chute 4 to cool it. Thereby the granulated material (b) is cooled and stickiness is lowered, and the noodlelike granulated material (b) lowered in stickiness becomes a state wherein it is easily broken by force like manual pressure. Then, when a link is rocked and a cutter 9 is moved to the outside of the lower end of the chute 4, the noodlelike granulated material (b) is cut and the granulated material of granules is produced. Further, the shape of the granulated material is changed by changing the shape of the punching holes 2.

Description

[Detailed description of the invention]

[00011

[Industrial Field of Application] The present invention relates to a cut-molding method and apparatus for producing granules by extruding a kneaded material with relatively high stickiness in an extrusion granulator. [0002] [0002] Generally, as extrusion granulators, cylindrical granulators and horizontal extrusion type ones are known. A conventional cylindrical granulator is explained with reference to Fig. 5.
A kneaded material a' is placed inside a cylinder 1" having a hole therein, and it is extruded onto a chute 4" using extrusion blades to produce a granulated product. [0003]

[Problems to be Solved by the Invention] However, when the kneaded material has a relatively high viscosity, the conventional extrusion granulator tends to produce lumps of granules or noodle-like granules. Extrusion granulation was performed by strictly setting conditions such as the amount of solvent, type of solvent, extrusion speed, length, diameter, and porosity of the soybean, but there was a problem that it was difficult to control the setting of conditions. . In particular, the mixture of Ethocel and wax used as the core of sustained-release preparations has a fairly high viscosity, so the granules extruded with an extrusion granulator become noodle-like, and the granules extruded with a cylindrical extrusion granulator are Not only was it not ejected from the turntable, but it also became blocked after drying, and it had to be done manually to break it down, which was a problem. [0004]

[Means for Solving the Problems 1] It is an object of the present invention to provide a means for the extrusion granulator as described above, which allows easy setting of conditions and prevents blocking even after drying. Therefore, we constructed a cut-forming method in which the mixture is placed inside a cylindrical body with punched holes, pushed out through the punched holes onto a chute using extrusion blades, cooled by air blowing, and then cut with a cutter. In addition, a cut-forming device was constructed in which a blow hole was provided in the chute of the extrusion granulator and a cutter was provided that moved up and down along the outer periphery of the chute. [0005] [Operation] A kneaded material is put into the cylindrical body of an extrusion granulator, and the kneaded material is pushed out through the punched hole by the extruder blades, so that the noodle-like granulated material falls onto a chute. In this case, the mixture heats up to about 60°C due to the frictional heat during extrusion, making it more sticky, but air is blown through the ventilation holes in the chute to cool it down and reduce the stickiness. . The noodle-like granules with reduced stickiness are cut with a cutter that moves up and down along the outer periphery of the chute to produce granules. [0006]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that a cylindrical granulator will be described as an example of an extrusion granulator. FIG. 1 is a front view of a cylindrical granulator. 1 is a cylinder, and as shown in FIG. 3, a large number of punched holes 2 are formed therein. As shown in Fig. 2, there is an extrusion blade 3 inside the cylinder l, and when the mixture a is put inside the cylinder 1 and the extrusion blade 3 is rotated, the noodle-shaped granules are released from the punching hole 2. It is pushed out and falls onto chute 4. 5 is a turntable, 6 is a discharge chute, and the turntable 5 is covered with a cover 7. [00071] The present invention is an extrusion granulator as described above, which is configured such that the noodle-shaped granules extruded onto the chute are cooled by air blowing and cut by a cutter. The chute 4 is provided with a large number of ventilation holes 8, and a cutter 9 is provided around the chute 4. As shown in FIG. 4, there is a blow pipe 10 communicating with the back side of the chute 4, and cooling air blown from the blow pipe 10 is blown out from the blow holes 8. Further, the cutter 9 is supported by left and right columns 11 and 12, and when the link 13 connected to the lower end of the right column 12 is swung about the shaft 14, the cutter 9 is lowered, as shown by the - dotted chain line. The lower end of the cutter 9 moves to the specified position. Note that a clearance of about 1 mm is provided between the inner surface of the cutter 9 and the lower end of the chute 4. A stopper 15 prevents collision with the chute 4. In addition, there is an input worm gear 16 below the device, and when the main gear 17 is rotated by this, the gear 18 is rotated, and the extrusion blade 3 is rotated via the support shaft 19. A presser blade 20 for pressing the kneaded material a is provided on the extruder blade 3. Furthermore, the rotation of the main gear 17 causes the gear 22 to rotate via the support shaft 21, and the turntable 5 to rotate via the ring gear 23. [00081 In the above device, when the kneaded material a is put inside the cylinder 1 and the extrusion blade 3 is rotated, the granulated material formed into a noodle shape is pushed out by the punching hole 2 and is pushed out onto the chute 4. to fall. In this case, the granulated material generates heat to about 60° C. due to frictional heat during extrusion, resulting in higher tackiness. Therefore, the granulated material is cooled by blowing cooling air from the air hole 8 formed in the chute 4, thereby reducing the stickiness. In this way, the noodle-like granules with reduced stickiness can be easily broken down with a force similar to finger pressure. When the link 13 swings and the cutter 9 moves to the outer side of the lower end of the chute 4, the noodle-like granules are cut to produce granules C (see FIG. 2). Note that by changing the shape of the punched holes 2, the shape of the granules can be changed. [0009]

[Effects of the Invention] In any case, according to the present invention, even when granulating a relatively sticky kneaded material, there is no need to set strict conditions, and the granules can be granulated using a simple mechanism. can manufacture things. It should be noted that the present invention can be appropriately applied to extrusion granulators other than the cylindrical extrusion granulator, such as a horizontal extrusion granulator and a fine disc pelleter, without changing the basic concept of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a front view of a cylindrical granulator equipped with a cut-forming device according to the present invention.

FIG. 2 is a plan view of a cylindrical granulator equipped with a cut-forming device according to the present invention.

FIG. 3 is a perspective view of a cylinder.

FIG. 4 is a sectional view illustrating the mechanism of the cut-forming device.

FIG. 5 is a front view of a conventional cylindrical granulator.

[Explanation of symbols]

a Kneaded mixture b Noodle-like granules Granules of C granules 1 Cylinder 2 Punching holes 3. Extruded feathers 4 Shoot 8. Ventilation hole 9 Cutter

[Figure 2]

Claims (2)

[Claims] [Claim 1] A mixture is put into a cylindrical body with punched holes, and the mixture is pushed out through the punched holes onto a chute using extruding blades, cooled by air blowing, and then cut with a cutter. A method for cutting and forming granules using an extrusion granulator. [Claim 2] An extrusion granulator that produces a granulated product by putting a mixture into a cylindrical body with a large number of punched holes and extruding it onto a chute through the punched holes using extrusion blades. , a cut-forming device for granulated material in an extrusion granulator in which a chute is provided with ventilation holes and a cutter that moves up and down along the outer periphery of the chute.