JPS6311123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a granulator head equipped with a cutting plate, a cutting tool having a number of cutters provided in front of the cutting plate, and a cooling device and a feeding device for the cut particles. The present invention relates to an apparatus for granulating synthetic resin melts and plastic materials, comprising a casing surrounding the head of the granulator.

A granulating device is known from U.S. Pat. No. 3,317,957, but in this granulating device it is not possible to adjust the plane parallelism of the circumferential surface between the cutter and the cutting plate. . If the various spacings between the individual cutters and the cutting plate are constant, subject to finishing tolerances, it is not possible to adapt the cutter to the cutting plate. In this case, the cutter can only be moved generally horizontally, and it is impossible to eliminate unevenness on one side.

The object of the invention is to ensure the adjustment of the plane parallelism between the rotating cutter and the cutting plate, that is to say the uniformity of the circumferential spacing between them.

The device according to the invention ensures good and precise cutting of the plastic continuous body flowing out of the cutting plate.
In this case, however, the partially dilute liquid polymer does not stick to the cutting plate and does not form lumps, furthermore ensuring that the service life of the cutter and the cutting plate is extended.

The above problems are solved by the present invention as follows. That is, the cutter shaft, bearing section, and drive section are combined into one unit, and one axial direction of the device parts assembled as a unit in this way is
The cutting plate is placed on a placing part provided on the side of the cutting plate, and the other side is made to correspond operably to a screw tightening part attached to the granulating device, so that the device part can be rocked together around the placing part. The solution is to make it adjustable.

By configuring the device part, which combines the cutter shaft, bearing part, and drive part into one unit, to be swingable and adjustable by the screw tightening part,
It becomes possible to separately adjust the distance between the cutter and the cutting plate on the entire circumferential surface.

Various distances are detected by fixing a distance measuring device with a scale on the cutter holder and rotating this measuring device in each case. in this case,
The differences shown on the basis of the measurement results can be exactly equalized by appropriate adjustment of the screw clamps.

A device part in which the cutter shaft, its bearing part, and the drive part are combined into one unit. One axial side of the device part is supported on an alignment ring formed as a mounting part, and the other part is attached to the granulating device by screw tightening. By configuring the parts to be horizontally aligned, the distance between the cutter and the cutting plate is approximately 0.01 mm, regardless of finishing inaccuracies.
It becomes possible to easily adjust the fine plane parallelism. This ensures very low cutter wear and cutting plate wear as the cut pieces are aligned - all cutters have equal spacing in their respective positions.

The invention will be explained in more detail below with reference to embodiments illustrated in the accompanying drawings.

The granulation device shown in FIG. 1 comprises an outer bush 1 and an insulating layer 2 provided around the outer bush 1. The granulation device shown in FIG. Guide bushing 3 inside outer bushing 1
A material guide line 4 is provided in the circumferential direction.
This guide bush 3 is coated with an insulating layer 5. A cutter shaft 7 is provided within the bearing casing 6 and is supported by bearings 8 and 9. A cutter holder 10 is provided below the cutter shaft, and a cutter 11 is fixed to this cutter holder.

On the upper side of the cutter shaft 7, a device is provided for moving the cutter shaft in the axial direction, which comprises an adjusting spindle 12 and a stop ring 13 for fixing the cutter shaft. The adjusting spindle 12 can be moved axially by means of a lever 14, which adjusting spindle 12 can therefore be moved between the cutter 11 and the cutting plate 1.
Allows for coarse adjustment of the spacing between 5 and 5.

A cutting plate 15 with holes 16 for ejecting the material to be granulated is provided on the lower side of the granulator. This cutting plate 15 is connected to the outer bushing 1 via screws 15a (FIG. 4) and to the guide bushing 3 via screws 15b. The guide bushing 3 is also connected via a screw 17a to a support formed by an elastically deformable centering ring 17, on which the bearing casing 6 rests. There is. Aligning ring 1
A hole 18 is formed in 7 and is oriented in the direction of the cutter 11 .

Cooling air is blown into the cylindrical chamber 20 between the bearing casing 6 and the insulating layer 5 via a large number of connecting pipes 19 distributed around the circumference. On the side of the chamber 20 facing the centering ring 17, cooling air is forced in through the holes 18 in the direction of the cutter. The chamber 20 is closed on the upper side by an annular wall 36 through which the connecting tube 19 is guided.

The cutter shaft 7 is rotated by a motor 21 together with a connecting portion 22 which is provided between the cutter shaft and the motor 21 and which compensates for vertical displacement of the cutter shaft 7, and this rotational movement is caused by the cutter holder. It is transmitted to the cutter 11 via 10.

The liquid synthetic resin melt passes through the adapter 23 to which the extruder is connected, enters the material guide line 4 and from there passes through the bore 16 to the cutting plate 15 .

In order to make it possible to adjust the plane parallelism between the cutter 11 and the cutting plate 15, the granulation device consists of the following parts: the cutter shaft 7 with the cutter holder 10 and the cutter 11; upper and lower bearings 8, 9 for
The parts of the bearing casing 6, the retaining plate 24 fixed above this bearing casing 6, the adjusting spindle 12 with a coupling 22 connecting the shaft 7 with the drive part 21 and the retaining ring 13, and the drive part 21. They are assembled into one unit and formed so that they can swing together as parts of this type of device.

One axial side of the above-mentioned device parts constituted as one unit of the granulation device has a bearing casing 6.
It rests on the centering ring 17 via the centering ring 17, and is configured to be limited in the circumferential direction and swingable and adjustable around the elastically deformable centering ring 17. The possibility of swinging is achieved by attaching a large number of differential screw clamping parts 25 distributed over the circumferential surface to the outer bush 1 of the granulation device, and causing these screw clamping parts 25 to act correspondingly on the other of said device parts. This can be achieved by making it possible. This screw tightening part 25 is connected to the outer bushing 1 via a holding part 26.

To ensure horizontal rocking possibility, the retaining plate 24
is provided with a notch 27 for accommodating a cylindrical screw 28 of small diameter, which allows limited horizontal sliding in the circumferential direction of the retaining plate 24. Cylindrical screw 2 screwed into guide bush 3
A disc spring 29 is provided between the head of the guide bushing 8 and the retaining plate 24, which ensures a uniform upward extension of the guide bushing 3.

Since the recess 27 is larger than the diameter of the cylindrical screw 28, a corresponding adjustment stroke for the unitary parts of the granulator is obtained.

The cut particles undergo a radial movement due to the centrifugal force of the cutter and impinge on a surface 30 covered by a water film formed by water flowing over the upper edge 31. This water film carries the cut particles downwards into the particle chamber 32 from which they exit through the opening 33.

In order to be able to maintain the katsuta, especially the katsuta 11
In order to be able to check the difference in plane parallelism between the cutting plate 15 and the cutting plate 15, the outer jacket 37 with the obliquely running surface 30 can be moved vertically by means of a hydraulic cylinder 38 and a rod 39. It is formed as such. The outer jacket 37 and the diagonally running surface 30 become structural parts of the casing for collecting particles, and when the structural part of the casing including the outer jacket 37 moves downward, the cutter 11 and the cutting plate 15 You can approach it.

In order to check the difference in plane parallelism between the cutter 11 and the cutting plate 15, a measuring element with a scale is provided on the cutter holder 10, which can be moved together by rotating the measuring holder. I am made to do so. This allows any inaccuracies regarding the plane parallelism between the cutter and the cutting plate to be detected by observing the scale. The screw tightening section 25 is operated according to the value detected in this way (FIG. 2). In addition, in conjunction with this, absolute plane parallelism over the entire circumferential surface is adjusted. That is, the unitary parts of the granulator are swung around the centering ring 17 and adjusted in accordance with the identified differences in plane parallelism.

Since the lowermost end of the cylindrical bearing casing 6 is provided horizontally and in substantially the same plane as the blade surface, even if the temperatures between the guide bushing and the outer bushing 1 are different, the cutter 11 and the cutting plate There is no difference in the gap between 15 and 15.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of the granulator, Figure 2 is a cross-sectional view taken along the line shown in Figure 1, Figure 3 is a cross-sectional view taken along the line shown in Figure 1, and Figure 4 is a cross-sectional view taken along the line shown in Figure 1. 1st
A cross-sectional view along the line in the figure. The symbols in the figure are 7, 10, 11...Katsuta shaft,
6, 8, 9, 12, 13, 24...Bearing section, 17
...Placement section, 21, 22... Drive section, 25... Screw tightening section.

Claims (1)

[Claims] 1. The above-mentioned granulator head equipped with a cutting plate, a cutting tool having a number of cutters provided in front of the cutting plate, and a cooling device for cut particles and a feeding device. In a granulating device for synthetic resins or plastic materials, which includes a casing surrounding the head of the granulating device, cutter shafts 7, 10, 11, a bearing portion 6,
8, 9, 12, 13, 24 and drive parts 21, 2
2 are combined into one unit, and one axial end of the device parts assembled into this unit is placed on the mounting part 17 provided on the cutting plate side, and the other part interacts with the screw tightening part 25 attached to the granulating device. The above-mentioned granulating device is characterized in that the device parts are configured to be swingable and adjustable together about the mounting portion 17. 2. The granulating device according to claim 1, wherein the mounting portion 17 is provided in substantially the same plane as the blade surface between the cutting plate 15 and the cutter 11. 3 The bearing part is the bearing casing 6 and the cutter holder 1
a bearing 8 of a cutter shaft 7 having a cutter 0 and a cutter 11;
9. Granulation device according to claim 1, characterized in that it comprises: 9, a holding plate 24, an adjusting spindle 12 and a retaining ring 13. 4. The granulating device according to claim 1, wherein the driving section comprises a connecting section 22 that compensates for vertical positional deviation between the motor 21 and the cutter shaft 7. 5. The granulating device according to claim 1, wherein the mounting portion 17 is formed by an elastically deformable centering ring. 6 Cut shafts 7, 10, 11, bearing parts 6, 8,
9, 12, 13, 24 and the drive parts 21, 22 are combined into one unit.
The oscillation and adjustment about the granulator is effected by means of a screw clamp 25 operatively attached to the holding plate 24 and fixed to the outer bush 1 of the granulator. Granulation device according to scope 1. 7 A large number of screw tightening sections 25, in particular four differential screw tightening sections 25, are provided around the retaining plate 24.
The granulation device according to any one of claims 1 to 6, characterized in that it is formed by. 8. The retaining plate 24 is formed with a notch 27 for accommodating a cylindrical screw with a small diameter that allows the retaining plate 24 to slide in the horizontal direction, and the retaining plate 24 is fitted inside the notch 27. is connected to the guide bushing 3 of the granulating device via a cylindrical screw 28 of small diameter, and that a spring element 29 is located between the head of the cylindrical screw 28 and the retaining plate 24. A granulation device according to any one of claims 1 to 7, characterized in that it is provided with a granulation device. 9. Granulation device according to claim 1, characterized in that the structural parts 30, 37 of the casing are designed to be vertically movable.