JP3713615B2 - Strand cutter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strand cutter. In detail, it is related with the strand cutter used when the strand extruded and cooled from the resin extruder is cut | disconnected to a pellet.
[0002]
[Prior art]
A conventional pellet manufacturing apparatus is shown in FIG. This conveys the resin extruder 1 and the strand (string-like resin) 2 extruded from the resin extruder 1 while being cooled by a water flow formed by water 4 supplied from a plurality of pipes 3. An inclined bowl-shaped conveyance path 5 and a strand cutter 7 for cutting the cooled strand 2 into pellets 6 are configured.
[0003]
As shown in FIG. 4, the strand cutter 7 includes a guide roll 8, a chute 9, a pair of feed rolls 10 and 10 ′ that draws the strand 2 supplied from the guide roll 8 and the chute 9, and the feed roll A fixed blade 11 for cutting the strand 2 fed from the rolls 10 and 10 ′ and a rotary blade 12 are configured. The fixed blade 11 supports the strand 2 from below, and the rotary blade 12 rotates and fixes in the direction of arrow A. The strand 2 on the blade 11 is cut from above to below.
[0004]
In such a strand cutter, if the distance between the fixed blade 11 and the rotary blade 12 is not appropriate, the strand 2 is not cut at a right angle but is cut obliquely, resulting in a poor pellet shape. Therefore, the position of the fixed blade 11 can be adjusted with respect to the rotary blade 12. The fixed blade 11 is adjusted by, for example, rotatably supporting the fixed blade 11 with a support shaft 13, providing bolts 14 and 14 ′ for pressing the lower portion of the fixed blade 11, and fixing the fixed blade 11 with the bolts 14 and 14 ′. A mechanism that adjusts the left-right movement is used.
[0005]
[Problems to be solved by the invention]
In the conventional fixed blade adjusting mechanism of the strand cutter, the bolts 14 and 14 ′ for adjusting the fixed blade 11 are located below the feed rolls 10 and 10 ′ and the rotary blade 12. Since the rotating blade 12 is dangerous while it is rotating, it is necessary to stop the rotating blade 12 when adjusting the position of the fixed blade 11. However, stopping the rotary blade 12 also temporarily stops the resin extruder. Further, the position adjustment of the fixed blade 11 can hardly be adjusted to the optimum position at one time, and it is necessary to perform the adjustment several times, and the resin extruder must be repeatedly stopped and operated each time. For this reason, there is a problem that the operation becomes complicated and takes a long time.
[0006]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to realize a strand cutter that can easily and safely adjust the clearance between the fixed blade and the rotary blade even during operation of the rotary blade. And
[0007]
[Means for Solving the Problems]
The present invention is (i) a pair of feed rolls 21 and 22, the rotary blade 24 which they 1 strand of a pair of feed rolls 21, 22 are arranged in the direction sent out, their pair of feed rolls 21 and 22 In the strand cutter which comprises the fixed blade 23 arranged between the rotating blade 24 and the resin blade extruded and cooled from the resin extruder into pellets, (b) the rotating blade 24 is fixed Ri formed is supported by the approach or away from possible movement adjusting means relative to the blade 23, (c) the movement adjustment means includes a bearing case 28 of the bearing 27 for supporting the both ends of the shaft 24a of the rotary blade 24, 28 has a structure in which the adjustment screw shaft (32) is used to linearly move the adjustment screw shaft 32 in the axial direction of the adjustment screw shaft 32 .
[0008]
By adopting this configuration, the spacing between the rotary blade and the fixed blade can be adjusted by moving the bearing of the rotary blade with the adjustment screw shaft, so that a rotary handle of the adjustment screw shaft can be provided at a position away from the rotary blade. It can be adjusted safely even when the rotary blade is rotating. Further, since the adjustment work can be performed even while the rotary blade is rotating, it is not necessary to stop the operation of the resin extruder, and an optimum adjustment can be performed by one adjustment.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are views showing an embodiment of the present invention, FIG. 1 is a top view, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. As shown in both drawings, the present embodiment includes a housing 20, a pair of feed rolls 21, 22, a fixed blade 23, a rotary blade 24, and a drive motor (not shown).
[0010]
The lower roll 22 of the pair of feed rolls 21 and 22 is rotationally driven by a drive motor, and the upper roll 21 can be moved up and down by an air cylinder (not shown). It is possible to adjust the interval between them.
[0011]
The fixed blade 23 has a plate shape, and a cutting blade 23a is formed on one side. The fixed blade 23 is disposed with its cutting edge 23 a facing the rotary blade 24, and is fixed to a fixed blade fixing member 25 provided on the housing 20 by a bolt 26.
[0012]
Further, the rotary blade 24 has a rotary shaft 24 a, the cutting blade is disposed so as to face the cutting blade 23 a of the fixed blade 23, and both ends of the rotary shaft 24 a are supported by bearing cases 28 via bearings 27. ing. The bearing case 28 is provided with a plurality of elongated holes 29 on the left and right, and is fixed to the housing 20 by bolts 30 inserted through the elongated holes 29. Reference numeral 24b denotes a rotary blade driving pulley attached to the rotary shaft 24a of the rotary blade 24, and 24c denotes a cover thereof.
[0013]
The bearing case 28 is provided with a boss 31 having a screw hole, and an adjustment screw shaft 32 is screwed into the screw hole of the boss 31. The adjustment screw shaft 32 has a collar 34 and a rotary plate 35 fixed by pins 36 with an adjustment screw shaft support member 33 attached to the housing 20 interposed therebetween, and a handle 37 is attached to the rotary plate 35. ing.
[0014]
The casing 20 is provided with a strand introduction chute 38 for introducing a strand on the side wall on the feed rolls 21 and 22 side, and a pellet discharge for discharging pellets below the contact point between the fixed blade 11 and the rotary blade 12. A chute 39 is provided. The housing 20 is provided with a position scale 40 and a dial gauge 41, and the bearing case 28 is provided with a pointer 40 a corresponding to the position scale 40 and a fixed piece 41 a corresponding to the dial gauge 41. .
[0015]
The operation of this embodiment configured as described above will be described with reference to FIG. First, the resin strand extruded and cooled from a resin extruder (not shown) is drawn by the feed rolls 21 and 22 from the strand introduction chute 38 of the housing 20, and then sent out on the fixed blade 23 toward the rotary blade 24. When it comes into contact with the rotary blade 24, it is cut into a pellet by the cutting blade of the rotary blade 24 and the cutting blade 23a of the fixed blade 23. The cut pellets are thrown downward by the rotary blade 24 and discharged to the outside through the pellet discharge chute 39.
[0016]
And when the shape of the pellet becomes abnormal, the clearance between the fixed blade 23 and the rotary blade 24 is increased, and it is necessary to adjust the clearance. To adjust the clearance, first, the bolt 30 that fixes the bearing case 28 is slightly loosened, and then the adjusting screw shaft 32 is rotated by rotating the handle 37 of the adjusting means. The adjustment screw shaft 32 does not move in the axial direction because the boss 33 is sandwiched between the collar 34 and the rotating plate 35.
[0017]
Accordingly, the rotation of the adjusting screw shaft 32 moves the boss 31 of the bearing case 28 screwed into the threaded portion to the left and right. As a result, the bearing case 28 is also moved left and right. In this way, the clearance can be adjusted by moving the rotary blade 24 closer to or away from the fixed blade 23. At this time, the optimum position of the rotary blade 24 can be determined by the shape of the pellet. Further, the adjustment after replacing the fixed blade 23 or the rotary blade 24 can be performed roughly with the position scale 40 and the pointer 40a, and the final fine adjustment can be performed with the dial gauge 41. After adjustment, the bolt 30 is tightened to fix the bearing case 28.
[0018]
As described above, according to the present embodiment, the distance between the rotary blade and the fixed blade can be adjusted by moving the bearing of the rotary blade by the adjusting means having the adjusting screw shaft. Since the rotary handle of the adjustment screw shaft can be provided outside the housing, the adjustment work can be performed safely even when the rotary blade is rotating. Further, since the adjustment work can be performed even while the rotary blade is rotating, it is not necessary to stop the operation of the resin extruder, and an optimum adjustment can be performed by one adjustment.
[0019]
【The invention's effect】
According to the strand cutter of the present invention, the distance between the rotary blade and the fixed blade can be adjusted by moving the bearing of the rotary blade by the adjusting means having the adjustment screw shaft. Therefore, the adjustment work can be performed safely even when the rotary blade is rotating. In addition, since the adjustment work can be performed even while the rotary blade is rotating, it is not necessary to stop the operation of the resin extruder, and it is possible to make an optimum adjustment with a single adjustment, and the adjustment time can be shortened compared to the conventional case. . Thereby, it can contribute to the improvement of the operation rate of a pellet manufacturing apparatus.
[Brief description of the drawings]
FIG. 1 is a top view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a perspective view showing a conventional pellet manufacturing apparatus.
FIG. 4 is a cross-sectional view showing a conventional strand cutter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 20 ... Housing | casing 21,22 ... Feed roll 23 ... Fixed blade 24 ... Rotary blade 25 ... Fixed blade fixing member 26, 30 ... Bolt 31 ... Boss 32 ... Adjustment screw shaft 33 ... Adjustment screw shaft support member 34 ... Collar 35 ... Rotation Plate 36 ... Pin 37 ... Handle 38 ... Strand introduction chute 39 ... Pellet discharge chute 40 ... Scale 41 ... Dial gauge

Claims (1)

(A) A pair of feed rolls (21, 22), a rotary blade (24) disposed in a direction in which the strands are fed from the feed rolls (21, 22), and the feed rolls (21, 22) and rotation A strand cutter having a fixed blade (23) disposed between the blade (24) and cutting the cooled resin strand extruded from the resin extruder into pellets;
(B) The rotary blade (24) is supported by movement adjusting means that can approach or separate from the fixed blade (23),
(C) The movement adjusting means includes an adjustment screw shaft (32) for adjusting the bearing case (28, 28) of the bearing (27, 27) that supports both ends of the shaft (24a) of the rotary blade (24). have a structure for advancing and retracting linear movement in the axial direction of the shaft (32),
(D) The fixed blade (23) is fixed to the fixing member (25) fixed to the casing (20) of the strand cutter containing the fixed blade (23) and the rotary blade (24) by a bolt (26). A strand cutter characterized by being fixed .

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