JP2007261185A - Cutting device for granulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent uneven wear of a cutter blade to extend the life by moving a cutter shaft with a moving device of a cutter unit of a granulator. <P>SOLUTION: The cutting device for the granulator is constituted so that the resin extruded from a nozzle hole (21a) of a die (21) by a screw of a kneading extruder is cut with the granulator (10), and the cutter shaft (14) for driving to rotate a cutter holder (15) of the granulator (10) can be moved in the direction perpendicular to its axis by a moving means (40, 40A). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting apparatus for a granulating apparatus, and in particular, by moving a cutter shaft having a cutter blade in a direction perpendicular to the axis by a moving means, the position of the cutter blade for cutting the resin extruded from the nozzle hole in the air is shifted. And a new improvement to extend the life of the cutter blade.

  In general, synthetic resin raw materials that are mass-produced by a synthetic reaction are rarely used as raw materials for molded products as they are, and are usually used as clay powder and glass in accordance with the mechanical properties required by molded products. Inorganic materials such as fibers are kneaded to improve the properties. As a device for improving the properties of such synthetic resin raw materials having a relatively small capacity, a screw-type twin-screw kneading extruder and a granulating device for cutting in air the raw material extruded from the die at the tip thereof into a string shape (strand) There is a cutting device for the granulator configured.

  In such a cutting apparatus for a granulator, as shown in FIGS. 9 to 11, there are, for example, those shown in Patent Documents 1 to 3 as conventionally used granulators. That is, what is indicated by reference numeral 15 in FIGS. 9 to 11 is a cutter holder constituting a granulating apparatus (not shown). The cutter holder 15 is a long thick plate-like member, and is fixedly connected to a cutter shaft 14 that passes through the center thereof. Cutter blades 16 are provided at both ends in the longitudinal direction of the cutter holder 15.

  9 to 11, what is indicated by reference numeral 21 is a die provided at the tip of a screw type twin-screw kneading extruder (not shown). The die 21 has a plurality of through holes, that is, nozzle holes 21 a. Formed and arranged in a straight line in the horizontal direction on the die surface 21b. The cutter blade 16 is configured to have a length that is at least equal to the arrangement length of all the nozzle holes 21a arranged in a straight line. When the cutter blade 16 moves along the die surface 21b, it passes through the openings of all the nozzle holes 21a. Are arranged as follows. Further, as the cutter holder 15 pivots around the cutter shaft 14, the cutter blades 16 assembled at both ends of the cutter holder 15 are alternately pressed against the die surface 21 b of the die 21 with a predetermined pressing force. It is arranged and configured so as to be slidable in the state where it is placed.

  In the granulator cutting apparatus configured as described above, the synthetic resin raw material is granulated as follows. That is, the cutter shaft 14 is rotated by the rotational drive of the granulating device, the cutter holder 15 is turned around the cutter shaft 14, and the cutter blades 16 assembled at both ends of the cutter holder 15 are placed on the die surface 21 b of the die 21. Slide along. On the other hand, the synthetic resin raw material melted and kneaded in the screw-type twin-screw kneading extruder is extruded as a string-like resin through the nozzle hole 21a of the die 21 to the die surface 21b. As shown in FIG. 12, the extruded resin 50 is cut by two or four cutter blades 16 that slide along the die surface 21b at an appropriate time interval, that is, the rotational speed of the cutter holder 15, and granulated as pellets 50a. Is done.

Japanese Patent Laid-Open No. 2004-358692 Japanese Utility Model Publication No. 2-112324 JP-A-11-129244

  Since the conventional cutting apparatus for granulators was configured as described above, the following problems existed. That is, as shown in FIGS. 13 and 14, when the cutter holder is rotated around the cutter shaft, the cutter blades assembled at both ends of the cutter holder have the same nozzle on the die surface every time the cutter blade is rotated. Pass through the hole location. As a result, only the portion A passing through the nozzle hole is worn and the sharpness is dulled, and the portion B passing through other than the nozzle hole is not worn (excluding wear due to sliding) and maintains a sharp cutting edge state. . The cutting edge becomes dull, and the cutter blade is replaced with a new one by stopping the operation of the kneading extrusion granulator and discarded. Accordingly, since the cutter blade is replaced and discarded in such a state, it is difficult to extend the operation time.

  The cutting apparatus for a granulating apparatus according to the present invention is the cutting apparatus for a granulating apparatus in which the resin extruded from the nozzle hole of the die by the screw of the kneading extruder is cut by the granulating apparatus. A cutter shaft that rotates the cutter is configured to be movable in a direction perpendicular to the axis by a moving means, and the granulating device is capable of rotating the cutter shaft provided with a slide base having a groove and a cutter blade. The moving means comprises: a cutter unit that has a slide drive protrusion that supports and can move linearly in the groove; and a drive bolt that is rotatably held by the slide base and screwed into a female screw portion of the slide drive protrusion. Is constituted by the groove, the slide drive protrusion, the female thread portion and the drive bolt, and the cutter shaft is rotated by the rotation of the drive bolt. The drive bolt is configured to be reciprocally movable in a direction perpendicular to the axis, the handle is provided with a handle, and the moving means is provided on an outer periphery of the cutter shaft. A cylindrical eccentric sleeve configured by eccentrically arranging an outer peripheral outer periphery and an inner hole inner shaft; and a cutter unit housing for rotatably holding the eccentric sleeve inside the sleeve. The cutter shaft is configured to be reciprocally movable in the direction perpendicular to the axis of the cutter shaft by the rotation of the eccentric sleeve, and the rotary handle provided on the eccentric sleeve is a notch portion of the housing. In order to change the flow path in the rotational direction of the screw in the resin flow path in front of each nozzle hole of the die, the nozzle hole array Direction is a structure which is disposed in a position rotated along a rotation direction of the screw from 0 ° position of the die.

  Since the cutting apparatus for a granulator according to the present invention is configured as described above, the following effects can be obtained. In other words, the cutter shaft that rotationally drives the cutter holder of the granulator is configured to be movable in the direction perpendicular to the axis, so that the cutter blade can be moved in the blade width direction, and the passage position of the die nozzle hole in the cutter blade. Can be changed. As a result, the cutter blade can pass through the nozzle holes of the die evenly and in all directions in the width direction of the die, and is evenly worn, the wear life is improved, and the productivity is improved.

  In the present invention, the cutter shaft having the cutter blade is moved in the direction perpendicular to the axis by the moving means, thereby shifting the position of the cutter blade for cutting the resin extruded from the nozzle hole in the air, thereby extending the life of the cutter blade. It aims at providing the cutting device for granulators.

Hereinafter, preferred embodiments of a cutting apparatus for a granulating apparatus according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
The granulating apparatus 10 is composed of a slide base 11 and a cutter unit 12 provided on the slide base 11 so as to be linearly movable. The cutter unit 12 includes a housing 13, a cutter shaft 14 inserted through the housing 13 and rotatably supported, a cutter holder 15 fixedly connected to one end of the cutter shaft 14, and a cutter blade provided in the cutter holder 15. 16, a pulley 17 fixedly connected to the other end of the cutter shaft 14, and a moving means 40 for moving the cutter unit 12. In the granulating apparatus 10 configured as described above, the cutter shaft 14 is in a vertical state with respect to the die surface 21b of the die 21 at the tip of a screw type twin-screw kneading extruder (not shown), and the cutter blade 16 is a die. It is configured to be slidable along the surface 21b.

The slide base 11 is a groove-like pedestal member having a central groove 11a. The housing 13 is a thick cylindrical member having a through-hole 13a, and has a female screw portion 13d in a direction perpendicular to the through-hole 13a at a lower portion thereof, and is configured to move in the groove 11a and protrude downward. A slide drive protrusion 13c is formed. A drive bolt 19a, which will be described later, is screwed into the female screw portion 13d of the slide drive protrusion 13c.
The longitudinal direction (axial direction) of the drive bolt 19a is orthogonal to the axial direction of the cutter shaft 14, and the drive bolt 19a is rotated through a handle 19b provided at the end of the drive bolt 19a. The cutter unit 12 and the cutter shaft 14 are configured to reciprocate at a distance between S1 and S2 shown in FIGS. 1 and 3 in a direction orthogonal to the axial direction thereof.
The aforementioned groove 11a, slide drive projection 13c, female screw portion 13d and drive bolt 19a constitute the moving means 40 for reciprocal movement described above.

  FIG. 1 shows a case where the screw connection of the female screw portion 13d of the housing 13 and the drive bolt 19a is operated manually by the handle 19b, but instead of the handle 19b, a rotary drive device having a control function is provided. It can also be configured to be connected to the drive bolt 19a.

  The cutter shaft 14 is a shaft member and is rotatably inserted into the through-hole 13a of the housing 13. Both ends protrude, the cutter holder 15 is fixed at one end, and the pulley 17 is fixed at the other end. ing.

  A rotation drive device (not shown) is connected to the pulley 17 by a drive belt (not shown), and the cutter holder 15 and the cutter blade 16 are rotated by the rotation of the cutter shaft 14.

  Next, the operation will be described. First, in the granulating apparatus cutting apparatus shown in FIGS. 1 to 3, the synthetic resin raw material is granulated as follows. That is, the cutter shaft 14 is rotated by the rotational drive of the granulating apparatus 10, the cutter holder 15 is turned around the cutter shaft 14, and is slid along the die surface 21 b of the cutter blade 16 die 21. On the other hand, the synthetic resin raw material melted and kneaded in the screw-type twin-screw kneading extruder is extruded in a string shape onto the die surface 21 b through the nozzle hole 21 a of the die 21. The extruded resin 50 made of a synthetic resin material is cut and pelletized by a plurality of cutter blades 16 that slide along the die surface 21b at appropriate time intervals.

  After an appropriate time after the start of operation, the handle 19b is rotated by a predetermined angle, for example, clockwise. By this rotation operation, the drive bolt 19a moves the housing 13 or the cutter unit 12 through the female thread portion 13d by a predetermined distance in the right direction in FIG. As a result, the cutter shaft 14, the cutter holder 15, and the cutter blade 16 move to the right by a predetermined distance along the die surface 21 b of the die 21. Accordingly, the position in the blade width direction where the cutter blade 16 passes through the nozzle hole 21a of the die 21, that is, the cutting position moves by a predetermined distance. By repeating this operation at appropriate time intervals, the cutter blade 16 sequentially moves rightward by a predetermined distance.

  The operation of rotating the handle 19b to the right is repeated, and when the moving distance reaches the end of the limit distance S2 of the cutter blade 16, the handle 19b is rotated in the reverse direction by a predetermined angle, that is, rotated to the left. Similarly, by repeating the counterclockwise operation of the handle 19b, the cutter blade 16 moves in the left direction, turns back the limit distance S2, and further moves to the limit distance S1. Thereafter, this operation is repeated.

  4 and 5 show another embodiment of the moving means 40 in the granulating apparatus 10 according to the present invention. 4 and 5, the reference numeral 13 denotes a housing constituting the cutter unit 12 in FIG. 1, and the reference numeral 14 similarly denotes a cutter shaft. The cutter shaft 14 is inserted into the through hole 13a of the housing 13 through a cylindrical eccentric sleeve 14a. The eccentric sleeve 14 a is slidably inserted into the through hole 13 a of the housing 13, the cutter shaft 14 is slidably inserted into the inner hole 52, and the outer peripheral shaft core 51 and the inner hole 52 of the outer periphery 54 are inserted. The inner hole shaft core 53 is configured to be eccentric with the eccentric amount S3. The housing 13 has a notch 13e formed in a part of the cylindrical portion, and a handle 14b fixedly connected to the eccentric sleeve 14a protrudes to the outside through the notch 13e. The other part of the granulating apparatus 10 has a structure excluding the moving means 40 shown in FIGS. 2 and 3, and the moving means 40A in the structure shown in FIG. 5 includes an eccentric sleeve 14a and a housing 13. The cutter shaft 14 can be reciprocated in the direction perpendicular to the cutter shaft 14 by the rotation of the eccentric sleeve 14a. The cutter shaft outer periphery 14A of the cutter shaft 14 and the inner hole 52 are substantially the same except for a rotatable gap. That is, as shown in FIG. 5, the eccentric sleeve 14 a is formed of an eccentric cylindrical body with a part of the wall thickness being thicker than the other when viewed in cross section.

  In the cutting apparatus for a granulator configured as shown in FIG. 5, the synthetic resin raw material is granulated as follows. That is, by rotating the rotary handle 14b at an appropriate angle at an appropriate time interval and rotating the eccentric sleeve 14a, the axis of the cutter shaft 14 is relative to the axis of the housing 13 of the cutter unit 12. Displaces and moves sequentially in the direction perpendicular to the axis, that is, in the direction below the arrow. The operation is the same as that of the embodiment shown in FIG.

  FIG. 6 shows another embodiment of the screw-type twin-screw kneading extruder of the kneading and extruding granulator according to the present invention. In FIG. 6, in the die 21 provided at the tip of the screw type twin-screw kneading extruder, the nozzle holes 21a arranged in a line are arranged at a 0 ° position 70, that is, vertically, in the case of FIG. In the case of 7, the angle α is inclined from the vertical. That is, in the turning direction of the cutter blade 16 of the granulating apparatus 10, all the nozzle holes 21a of the die 21 are arranged so as to overlap in the diameter direction without being separated from each other.

  Further, as shown in FIG. 8, in a resin flow path (not shown) in front of each nozzle hole 21a of the die 21, in order to change the flow path in the rotation direction of the screw 80, a row of the nozzle holes 21a. The direction is arranged at the vertical (vertical direction) of the die, that is, at a position rotated from the 0 ° position 70 along the rotational direction of the screw, so that the resin is prevented from accumulating in the flow path. Yes.

It is a block diagram which shows the cutter holder in the cutting device for granulators by this invention. It is a front view which shows the granulation apparatus by this invention. FIG. 3 is a cross-sectional view of FIG. 2. It is a block diagram of the cutter holder which shows the other form of FIG. It is sectional drawing which shows the other form of FIG. It is explanatory drawing which shows the movement of the cutter blade of FIG. It is explanatory drawing which shows the nozzle hole of die | dye. It is explanatory drawing which shows the other form of the nozzle hole of die | dye. It is a block diagram which shows the conventional cutter holder. It is an expanded sectional view of the principal part of FIG. It is a block diagram which shows the other cutter holder of FIG. It is an expanded sectional view of the principal part of FIG. It is explanatory drawing which shows the abrasion state of the conventional cutter blade. It is sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Granulator 11 Slide base 11a Groove 12 Cutter unit 13 Housing 13a Through-hole 13c Slide drive protrusion 13d Female thread part 13e Notch part 14 Cutter shaft 14a Eccentric sleeve 14b Rotation handle 15 Cutter holder 16 Cutter blade 17 Pulley 19a Drive bolt 19b Handle 21 Die 21a Nozzle hole 21b Die surface S1 Limit distance S2 Limit distance S3 Eccentricity

Claims (6)

  In the granulator cutting apparatus, the granulator (10) cuts the resin (50) extruded from the nozzle hole (21a) of the die (21) by the screw (80) of the kneading extruder. A cutter for a granulator characterized in that a cutter shaft (14) for rotationally driving a cutter holder (15) of the granulator (10) is configured to be movable in a direction perpendicular to the axis by a moving means (40, 40A). .   The granulating device (10) rotatably supports the slide base (11) having a groove (11a) and the cutter shaft (14) provided with a cutter blade (16), and in the groove (11a). A cutter unit (12) having a slide drive projection (13c) that can move linearly, and a drive that is rotatably held by the slide base (11) and screwed into a female screw portion (13d) of the slide drive projection (13c) The moving means (40) is composed of the groove (11a), the slide drive projection (13c), the female screw portion (13d) and the drive bolt (19a), and the drive bolt The cutting apparatus for a granulating apparatus according to claim 1, wherein the cutter shaft (14) is configured to reciprocate in a direction perpendicular to the axis of the cutter shaft (14) by the rotation of (19a).   The granulating apparatus cutting apparatus according to claim 2, wherein the drive bolt (19a) is provided with a handle (19b).   The moving means (40A) is provided on the outer periphery (14A) of the cutter shaft of the cutter shaft (14), and an outer peripheral shaft core (51) on the outer periphery and an inner hole shaft core (53) of the inner hole (52). A cylindrical eccentric sleeve (14a) constituted by eccentricity, and a housing (13) of a cutter unit (12) for holding the eccentric sleeve (14a) rotatably inside thereof, The granulator according to claim 1, wherein the cutter shaft (14) is configured to reciprocate in a direction perpendicular to the axis of the cutter shaft (14) by rotation of the eccentric sleeve (14a). Cutting device.   5. The granulator according to claim 4, wherein a rotating handle (14 b) provided on the eccentric sleeve (14 a) protrudes outward from a notch (13 e) of the housing (13). Cutting device.   In the flow path of the resin (50) before each nozzle hole (21a) of the die (21), in order to change the flow path in the rotational direction of the screw (80), the nozzle hole (21a) The granulating apparatus according to any one of claims 1 to 5, wherein the row direction is arranged at a position rotated from the 0 ° position (70) of the die along the rotation direction of the screw (80). Cutting device.

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