JPH06166023A - Aerially pelletizing method and device - Google Patents

Abstract

PURPOSE:To ensure the removal of chips, adhering matters, or the like generated in the cutting of a melt material. CONSTITUTION:In an aerially pelletizing method and device, a first medium W jetted out of either a cutter blade 10 or a cutter support 9 or a second medium jetted out of a die 2 is supplied to an outside 2aA of a die cutting surface, thereby completely removing the chips or the like of a melt material adhering to the periphery of the die cutting surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial granulation method and apparatus, and more particularly to a novel method for surely removing chips, deposits and the like generated when a melt such as a molten resin and rubber is cut. Regarding improvement.

[0002]

2. Description of the Related Art There are various types of aerial granulators of this type that have been conventionally used. Among them, a typical configuration is shown in FIGS. 9 to 11. That is, what is shown in FIG. 9 is a center hot-cut type aerial granulator, and in FIG. 9, a filtration device 4 in which a die holder 3 having a die 2 is mounted on a carriage 1 is shown.
The die holder 3 is provided with a cutter box 7 having a cutter unit 6 driven by a motor 5.

A cutter support 9 provided on the cutter shaft 8 of the cutter unit 6 is formed adjacent to the die 2. FIGS. 10 and 11 show the cutter support.
The cutter blade 10 shown by is provided with a cutter blade nozzle 11 communicating with a fountain supply unit (not shown).

The outlet direction 11aA of the outlet 11a of the cutter blade nozzle 11 is orthogonal to the axial direction of the cutter support 9 (that is, the radial direction of the cutter support 9).
Is formed in. Note that this structure is similar to the configuration of Japanese Utility Model Application Laid-Open No. 4-64111 filed by the present applicant.

Therefore, in the above structure, the cutter blade 10 is jetted radially from the nozzle 11 for water, air or water vapor (hereinafter, referred to as the first medium) W, and the cutter blade 10 is slidably contacted at a high speed. When a melt such as molten resin or rubber is extruded from the cut surface, the melt extruded into the atmosphere is cut into particles by the cutter blade 10, and the cut granular melt is in the outer peripheral direction of the cutter blade. It scatters, is cooled with cooling water, is discharged from the cutter box 7 together with the cooling water, and the cooling water is separated and collected as product pellets.

That is, the melt extruded from the cut surface of the die 2 is cut into particles, and then the rotary cutting operation of the cutter blade 10 and the water jetted from the nozzle 11 for the cutter blade cause the melt to be cut from the cut surface of the die 2. It scatters forward and in the outer peripheral direction, penetrates into a film of cooling water (water that spirally flows on the inner peripheral surface) formed on the cylindrical inner peripheral surface of the cutter box 7, and is cooled. Similarly, fine cutting wastes that are partially generated when the melt is cut are scattered, cooled with cooling water and discharged, and separated and recovered from the product pellets by sieving or the like.

During this time, the water jetted from the cutter blade nozzle 11 forms a kind of disk-shaped water film on the outer periphery of the cutting surface of the die 2, and the melted material and cutting scraps cut into particles form the cutting surface. It is prevented from scattering to the periphery of the rear die 2.

[0008]

Since the conventional aerial granulator is constructed as described above, the following problems exist. That is, the granular pellets and fine cutting waste immediately after being cut by the cutter blade on the cut surface of the die are still in a semi-solidified state. On the other hand, the die is maintained at a high temperature in order to maintain the fluidity at a high temperature in order to extrude the melt from the thin nozzle. The cutter blade is in sliding contact with the cutting surface of the die maintained at a high temperature to cut the high-temperature melt, so that the cutter blade is heated to a high temperature. That is, the pellets and cutting scraps immediately after cutting, and the die and the cutter blade are in a state of being easily bonded to each other.

Most of the granular pellets and fine cutting scraps cut by the cutter blade rotating at a high speed scatter in front of the die cutting surface and in the outer peripheral direction, plunge into the cooling water, and are discharged after being cooled. , Some of them have a weak scattering force, have different scattering directions, or collide somewhere and bounce back. On the other hand, the water film formed by the water ejected from the cutter blade nozzle by the rotation of the cutter blade is not a perfect water film that always forms a flat surface on the outer circumference of rotation of the cutter blade, but a water film between adjacent cutter blades. There is a gap. Therefore, a part of the semi-solidified granular pellets and cutting chips were scattered from the gap of the water film to the periphery of the die on the rear side of the die cutting surface and adhered there. This deposit accumulates with the passage of time and becomes a large lump that comes into contact with the outer periphery of the cutter blade and makes the cutting operation unstable, which deteriorates the shape quality of the product pellets and, in some cases, causes an inoperable state. Was there. In addition, the adhered material was chipped off and mixed into the product pellets, resulting in poor shape quality of the product pellets or change in material quality (deterioration) due to being adhered at high temperature for a long time, resulting in poor physical property quality. .
Further, a large lump may be chipped off to prevent discharge of the product pellets from the cutter box, and product pellets may be accumulated in the cutter box, resulting in an inoperable state.

Further, similar adhesion also occurs on the front surface or the back surface of the cutter blade, which causes the same troubles as described above such as unstable operation of the cutter blade. For such a problem, it is necessary to stop the mechanical device, disassemble part of the device and perform cleaning work such as removal of adhered substances, resulting in a decrease in production volume and production efficiency due to interruption of operation and interruption. For this reason, there was a loss of raw materials due to operation stoppage and defective product generation at startup.

The present invention has been made to solve the above problems, and in particular, it is intended to surely remove chips and deposits generated when a melt such as a molten resin and rubber is cut. It is an object of the present invention to provide a method and a device for aerial granulation.

[0012]

The aerial granulation method according to the present invention is a method for aerial granulation in which a melt extruded from a die cutting surface of a die into the atmosphere is cut through a rotating cutter blade. In the method, the first medium ejected from the cutter blade nozzle formed on the cutter blade is supplied to the outer side surface of the die cutting surface to remove chips and the like of the melt adhering to the outer side surface. .

Another aerial granulation method according to the present invention is
The melt extruded from the die cutting surface of the die into the atmosphere, in the aerial granulation method adapted to cut through a rotating cutter blade, jetting from a nozzle formed in a cutter support having the cutter blade In this method, one medium is supplied to the outer surface of the die cutting surface to remove chips and the like of the melt adhering to the outer surface.

Another aerial granulation method according to the present invention is
The melt extruded from the die cutting surface of the die into the atmosphere, in the aerial granulation method adapted to cut through the rotating cutter blade, the second medium ejected from the die nozzle formed in the die It is a method of supplying to the outer side surface of the die cutting surface and removing chips and the like of the melt adhering to the outer side surface.

Further, the aerial granulator according to the present invention is the aerial granulator in which the melt extruded from the die cutting surface of the die into the atmosphere is cut through a rotating cutter blade. A cutter blade nozzle formed on a blade, a cutter support nozzle formed on a cutter support for holding the cutter blade and communicating with the cutter blade nozzle, and the cutter formed on a cutter shaft holding the cutter support A cutter shaft nozzle communicating with a support nozzle is provided, and the first medium is supplied to the outer surface of the die cutting surface via the cutter blade nozzle.

Another aerial granulator according to the present invention is
A melt for extruding from the die cutting surface of the die into the atmosphere, in an aerial granulating device configured to cut through a rotating cutter blade, a cutter support nozzle formed in a cutter support that holds the cutter blade. And a cutter shaft nozzle communicating with the cutter support nozzle formed on the cutter shaft holding the cutter support, and the first medium is transferred to the outer surface of the die cutting surface via the cutter support nozzle. It is configured to be supplied.

More specifically, the cutter blade is mounted on the cutter support via a mounting bolt, and the first medium is transferred via a mounting bolt nozzle formed on the mounting bolt and communicating with the cutter support nozzle. The cutter blade is configured to be supplied to the front surface and / or the back surface.

Further, the aerial granulator according to the present invention is the aerial granulator in which the melt extruded from the die cutting surface of the die into the atmosphere is cut through a rotating cutter blade. And a second medium is supplied to the outer side surface of the die cut surface through the die nozzle.

[0019]

In the method and apparatus according to the present invention, the first medium supplied in communication with the cutter shaft, the cutter support and the cutter blade is connected to the outside of the cutting surface of the die from the outer periphery of the cutter support or the tip of the cutter blade. To the side,
It is ejected to the front or back of the cutter blade. Further, the second medium is jetted from the entire outer circumference of the cut surface of the die to the entire outer circumference of the cut surface.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the air granulation method and apparatus according to the present invention will be described in detail below with reference to the drawings. In addition, the same or equivalent portions as those of the conventional example will be described using the same reference numerals. 1 to 3, the first embodiment, FIG.
FIG. 5 shows the second embodiment, and FIGS. 6 to 8 show the third embodiment.

A reference numeral 2 in FIGS. 1 to 3 is a die having a melt nozzle 12, and a ring-shaped die cutting surface 2a formed on the die 2 has a hardened layer (not shown). It is formed on the same surface as the die cutting surface 2a.

The mounting bolt 2 is attached to the cutter holder 20 of the cutter shaft 8 rotatably provided so as to face the die 2.
1, a plurality of cutter blades 10 are radially arranged (only two of them are shown in the drawing), and each cutter blade 10 is configured to slide while being joined to the die cutting surface 2a.

The cutter blade 10 is provided with a cutter blade nozzle 11, and the cutter blade nozzle 11 has a nozzle 9 at its end.
Exit direction 11aA of exit 11a formed by bending 0 degrees
Is configured to be parallel to the axial direction 9a of the cutter support 9. Although the exit direction 11aA of the exit 11a is bent 90 degrees in the configurations of FIGS. 1 to 3 described above, the exit direction 11aA is not limited to 90 degrees and may be other than 90 degrees.

The cutter shaft nozzle 8a formed on the cutter shaft 8, the cutter support nozzle 9b formed on the cutter support 9 and the cutter blade nozzle 11 are in communication with each other. Note that the configuration other than that shown in FIG.
The configuration is the same as that shown in FIG.

Therefore, in the above-mentioned structure, when the melt such as the molten resin or rubber extruded by the extruder (not shown) comes out from the die cutting surface 2a through the melt nozzle 12, each cutter is rotated. It is cut into granular pellets by the blade 10. In the above case, since the first medium W made of any one of water, air, and steam jetted from the outlet 11a of the cutter blade nozzle 11 is supplied to the outside 2aA of the die cutting surface 2a, it is generated by the cutting operation described above. The cutting chips, fine particles, and the like of the melt are scattered and try to adhere to the position of the outer surface 2aA, but the first medium W blows them off to prevent the adhesion. The chips and the like blown off by the first medium W are made to flow and discharged together with the first medium W and the pellets, and are separated and collected from the pellets in a later step.

Next, in the case of the second embodiment shown in FIGS. 4 and 5, a cutter support nozzle 9 provided on the cutter support 9 radially arranged around the cutter shaft 8 is provided.
b is opened at its tip so as to eject the first medium W, and the first medium W ejected from the cutter support nozzle 9b is the outer side 2aA of the die cutting surface 2a.
It is possible to prevent the adhering of cutting chips and the like by being supplied to the same as in the first embodiment.

In addition, in the case of FIG. 5, the cutter bolt 9b is connected to the nozzle 21a for the mounting bolt formed on the mounting bolt 21, and the first medium W is jetted from the nozzle 1a for the mounting bolt. It is possible to prevent the chips and the like from adhering to the front surface of the cutter blade 10 when the pellet P is cut. Further, the cutter support nozzle 9b
From the first medium W to the back surface of the cutter blade 10
It is also possible to inject.

In the structure shown in FIGS. 4 and 5, the same parts as those in the first embodiment described above are designated by the same reference numerals and the description thereof is omitted.

Further, in the case of the third embodiment shown in FIGS. 6 to 8, a die nozzle 30 is formed at a position in the vicinity of the outer periphery of the die cutting surface 2a of the die 2, and the air or steam jetted from the die nozzle 30 is used. The second medium 30a consisting of prevents the chips from adhering to the outer peripheral surface of the die cutting surface 2a. The die nozzle 30 described above is used.
6 is composed of a recess 30b directly formed in the die 2 and a large number of injection ports or injection slits 30c. In the configuration of FIG. 7, a circular pipe body 30e having a large number of holes or injection slits 30d is embedded in the recess 30b. In addition to the above configuration, in the configuration of FIG. 8, the triangular tube body 30 provided in the step portion 30f and having a large number of holes or injection slits 30d.
g. 6 to 8, the same parts as those in FIG. 1 described above are designated by the same reference numerals and the description thereof is omitted.

[0030]

The aerial granulation method and apparatus according to the present invention comprises:
Since it is configured as described above, the following effects can be obtained. First, in the case of the first embodiment, since the outlet of the cutter blade nozzle is outside the hardened layer on the die cutting surface and the outlet direction is open so as to collide with the outer surface of the die cutting surface, the die cutting surface is It is possible to remove chips and deposits that tend to adhere to the outer surface of the, and to perform stable continuous production for a long period of time. Further, in the case of the second embodiment, the first medium sprayed from the cutter support nozzle of the cutter support over the entire circumference can completely prevent the adhesion of cutting chips and deposits to the vicinity of the hardened layer. further,
In the case of the third embodiment, since the second medium is jetted to the outside of the die cutting surface, it is possible to prevent the generation of deteriorated substances due to the adhered substances that adhere to the outside of the die cutting surface, and to prevent thermal deterioration. An aerial granulator for sensitive types of resins can be realized.

[Brief description of drawings]

FIG. 1 is a sectional view of essential parts showing a first embodiment of an aerial granulator according to the present invention.

2 is a plan view showing the cutter blade of FIG. 1. FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is a cross-sectional view of essential parts showing a second embodiment of the aerial granulator according to the present invention.

5 is an enlarged cross-sectional view showing another example of the main part of FIG.

FIG. 6 is a cross-sectional view of essential parts showing a third embodiment of the aerial granulator according to the present invention.

FIG. 7 is a cross-sectional view showing another example of FIG.

FIG. 8 is a cross-sectional view showing another example of FIG.

FIG. 9 is a configuration diagram showing a conventional aerial granulator.

10 is a plan view showing the cutter blade of FIG. 9. FIG.

11 is a left side view of FIG.

[Explanation of symbols]

 2 Die 2a Die cutting surface 2aA Outer surface 8 Cutter shaft 8a Cutter shaft nozzle 9 Cutter support 9b Cutter support nozzle 10 Cutter blade 11 Cutter nozzle 11aA Exit direction 21 Mounting bolt 21a Mounting bolt nozzle 30 Dice nozzle W 1st Medium 30a Second medium

Claims (7)

[Claims] 1. The aerial granulating method, wherein a melt extruded from a die cutting surface (2a) of a die (2) into the atmosphere is cut through a rotating cutter blade (10), wherein the cutter is The first medium (W) ejected from the cutter blade nozzle (11) formed on the blade (10) is provided with an outer surface (2aA) of the die cutting surface (2a).
To the outer surface (2aA) of the melt to remove chips and the like of the melt. 2. The aerial granulation method, wherein the melt extruded from the die cutting surface (2a) of the die (2) into the atmosphere is cut through a rotating cutter blade (10), the cutter. The first medium (W) ejected from the cutter support nozzle (9b) formed in the cutter support (9) having the blade (10) is supplied to the outer side surface (2aA) of the die cutting surface (2a), An aerial granulation method, characterized in that chips and the like of the melt adhering to the outer surface (2aA) are removed. 3. The aerial granulation method in which the melt extruded from the die cutting surface (2a) of the die (2) into the atmosphere is cut through a rotating cutter blade (10), The second medium (30a) ejected from the die nozzle (30) formed in (2) is supplied to the outer side surface (2aA) of the die cutting surface (2a) and adheres to the outer side surface (2aA). An aerial granulator which removes chips and the like of the melt. 4. The aerial granulator, wherein the melt extruded from the die cutting surface (2a) of the die (2) into the atmosphere is cut via a rotating cutter blade (10), A cutter blade nozzle (11) formed on the blade (10), and a cutter support nozzle (11) formed on the cutter support (9) holding the cutter blade (10) and communicating with the cutter blade nozzle (11) ( 9b), and a cutter shaft nozzle (8a) communicating with the cutter support nozzle (9b) formed in the cutter shaft (8) holding the cutter support (9), the cutter blade nozzle ( 11) through the outer surface (2) of the die cutting surface (2a)
An aerial granulation apparatus having a configuration in which the first medium (W) is supplied to aA). 5. An aerial granulator for cutting a melt extruded from a die cutting surface (2a) of a die (2) into the atmosphere through a rotating cutter blade (10), wherein the cutter is Nozzle for cutter support (9b) formed in the cutter support (9) holding the blade (10), and the cutter support (9)
And a cutter shaft nozzle (8a) communicating with the cutter support nozzle (9b) formed in the cutter shaft (8) holding the die support surface (9b) through the cutter support nozzle (9b). An aerial granulator, characterized in that the first medium (W) is supplied to the outer surface (2aA) of 2a). 6. The cutter blade (10) is attached to the cutter support (9) through a mounting bolt (21), and is formed on the mounting bolt (21) to communicate with the cutter support nozzle (9b). The aerial granulation according to claim 4 or 5, wherein the first medium (W) is supplied to the front surface and / or the back surface of the cutter blade (10) through a nozzle (21a) for a mounting bolt. apparatus. 7. An aerial granulator for cutting a melt extruded from a die cutting surface (2a) of a die (2) into the atmosphere through a rotating cutter blade (10), A structure comprising a die nozzle (30) formed in (2), and supplying the second medium (30a) to the outer surface (2aA) of the die cutting surface (2a) through the die nozzle (30). An aerial granulation device characterized in that