JPH0740415A - Apparatus and method for cleaning screw port of barrel of kneading extruder - Google Patents

Abstract

PURPOSE:To certainly clear the screw port of the barrel of a kneading extruder without leaving residue. CONSTITUTION:In a cleaning apparatus cleaning the screw port 2 of the barrel 1 of a kneading extruder by gradually deeply inserting a rotary shaft 10 equipped with a cleaning means 11 in the screw port 2 from the front end part thereof, a rotary drive means 17 is connected to the rotary shaft 10 equpped with the cleaning means 11 and a position holding means 12 positioning and holding the rotary shaft 10 within the screw port 2 along the axis of the screw port 2 is provided in a state not cooperated with the rotary shaft 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a kneading extruder, particularly a twin-screw kneading extruder having a screw port having a cross-section formed into an approximately eight-character shape by arranging two barrels in a line. At the same time, the present invention relates to a cleaning device such as a screw port of a barrel in a kneading extruder that can surely clean the residue without leaving a residue, and a cleaning method using the same.

[0002]

2. Description of the Related Art Conventionally, when a molding material is manufactured by mixing other materials such as a plasticizer, a stabilizer, a flame retardant, a glass fiber or a pigment with a synthetic resin material, kneading is generally performed. An extruder is used. In such a kneading extruder, a synthetic resin material and one or more kinds of other materials are kneaded by rotating a screw shaft provided inside in a screw port that penetrates in the axial direction of the barrel. By the way, as such a kneading extruder, there are a single-screw kneading extruder having only one screw shaft and a twin-screw kneading extruder having two screw shafts.

On the other hand, in such a kneading extruder, when the synthetic resin material is mixed with one or more other materials, at least one of the synthetic resin material and the one or more other materials, especially the color of the pigment, Whenever trying to change the type, it is necessary to clean the screw mouth and the screw shaft inside which the barrel screw shaft is provided. In this case, since the barrel is generally fixedly attached to the machine side of the kneading extruder, the screw shaft is removed from the machine side and the screw port and the screw shaft of the barrel are separately cleaned. In the single-screw kneading extruder, the screw port of the barrel is formed into a circular cross section, and in the twin-screw kneading extruder, the screw ports 2 and 2 of the barrel 1 are each circular in cross section as shown in FIGS. 6 to 8. Then, two of them are arranged side by side so as to be in communication with each other, and the cross-sectional shape is formed into an 8-shape. In some twin-screw kneading extruders, as shown in FIG. 8, the screw ports 2 and 2 of the barrel 1 are partially formed with hexagonal cross-sections having the same inner diameter in circular cross-sections. . And when trying to clean the screw mouth of the barrel,
The residue of the synthetic resin material remaining in the screw mouth is kept in a molten state by, for example, heating the heating means inside the barrel, and the tip of the rotary shaft b of the hand drill a as shown in FIG. Hold a cleaning device with a brush c, which is a cleaning means formed of a metal material such as iron or brass, on its side by hand, and from the front side to the rear side of the screw mouth, attach the rotating shaft b to which the brush c is attached. The rotary shaft b is rotated by the action of the motor that serves as the rotation driving means provided in the main body d of the hand drill a that is gradually inserted deeply and linked to the rotary shaft b, and the screw port is cleaned by the brush c that serves as the cleaning means. I'm cleaning. After that, a cloth piece may be further wound around the brush c, which is a cleaning unit, to perform the final cleaning. Also, after cleaning the residue mainly composed of the synthetic resin material remaining in the screw mouth in the molten state, cool the residue or wait for the residue to cool and solidify, and then clean the stearic acid etc. Finish cleaning may be performed using an activator. At this time, a cleaning activator such as stearic acid penetrates between the inner peripheral surface of the screw mouth and the residue to promote the separation of the residue from the screw mouth.

[0004]

However, the screw port of the barrel in the kneading extruder, whether it is a single-screw kneading extruder or a twin-screw kneading extruder, usually has an inner diameter of 20 to 20.
Although the length is about 150 mm, the length is about 3000 mm, which is long. For this reason, when a user holds a cleaning device with a brush as a cleaning means on the tip side of the rotary shaft of the hand drill and tries to clean it, the rotary shaft of the hand drill inevitably becomes long and the barrel When cleaning by gradually inserting the screw mouth from the front side to the rear side deeply, especially in the rear side in the screw mouth, it is difficult to align the rotary axis of the hand drill with the axis of the screw mouth, especially in the rear side. It is difficult to reliably clean. And, rather than a single-screw kneading extruder, in a twin-screw kneading extruder,
As described above, the two screw mouths of the barrel are partially arranged side by side so that the cross-sectional shape is formed into an approximately 8-shape, and the cross-sectional shape becomes complicated. Such a tendency becomes more prominent, for example, when the screw is straddled over a pair of screw openings. Considering these points, it is conceivable to lengthen the brush, which is the cleaning means, so that the rotation axis of the hand drill can easily follow the axial center of the screw mouth within the screw mouth, but it remains at the screw mouth. Since the residue is mainly composed of molten synthetic resin material and has high viscosity, the motor that serves as the rotation driving means provided in the body of the hand drill needs to have high output, resulting in a large hand drill. In addition, it becomes a heavy object, and it is troublesome to carry out the cleaning work by holding the hand drill by hand, and the workability is deteriorated. In particular, in a twin-screw kneading extruder, the two screw openings of the barrel arranged side by side must be cleaned separately, which results in a long cleaning time, which is an obstacle to improving the operation efficiency.

In recent years, a twin-screw kneading extruder has a high kneading performance and is preferable in terms of downsizing of the machine body, and therefore tends to be used more frequently than a single-screw kneading extruder. However, in the twin-screw kneading extruder, as described above, two screw ports of the barrel are partially arranged side by side so that the cross-sectional shape is formed into a substantially 8-shape, and a complicated cross-sectional shape is formed. Therefore, in particular, when trying to clean by holding the cleaning device in which the brush serving as the cleaning means is attached on the tip side of the rotary shaft of the hand drill, various problems occur and the original operating efficiency is increased. It is becoming more and more difficult to improve.

In view of such conventional problems, a cleaning device for a barrel screw port or the like in a kneading extruder according to the present invention and a cleaning method using the same are provided, for example, a screw port of a barrel in a kneading extruder. The first purpose is to be able to surely clean the remaining parts without leaving any residue, and in particular, two barrels of a twin-screw kneading extruder are arranged in parallel so that the two barrels are connected in parallel and the cross-sectional shape is almost eight. The second purpose is to be able to surely clean the screw port formed at the same time without leaving a residue.

[0007]

First, in order to achieve the first object, in claim 1 of the present invention, a cleaning means is provided from the front side to the rear side of the screw port of the barrel in the kneading extruder. A cleaning device that gradually inserts the rotary shaft deeply to clean the screw mouth, etc., and connects the rotary drive means to the rotary shaft equipped with the cleaning means, and the rotary shaft inside the screw mouth etc. A cleaning device such as a screw port of a barrel in a kneading extruder is provided in which a position holding means for holding a position substantially along the center is provided in a non-interlocking state with a rotating shaft. Further, the second aspect exemplifies that the position holding means is provided on the tip side of the rotary shaft. Further, claim 3
Then, the position holding means is formed in a plate shape in which the cross-sectional shape of the outer peripheral surface substantially matches the cross-sectional shape of the inner peripheral surface of the screw mouth, etc., and is of a size that can be installed with a slight gap left in the screw mouth etc. It is illustrated that it is formed. In addition, claim 4 exemplifies that a brush is used as the cleaning means.

On the other hand, in order to achieve the second object, according to claim 5 of the present invention, from the front side to the rear side of a screw port or the like in which two barrels of a twin-screw kneading extruder are arranged in parallel in a communicating manner. In the cleaning device, the two rotating shafts provided with the cleaning means are juxtaposedly inserted to clean the pair of screw mouths at the same time. The rotation driving means is linked to the rotating shaft of the pair of rotating shafts, and the position holding means for holding the position of the pair of rotating shafts inside the pair of screw ports and the like substantially along the axis of the screw port is not provided to the pair of rotating shafts. A cleaning device such as a screw port of a barrel in a kneading extruder provided in an interlocking state is configured. In addition, the sixth aspect exemplifies that the position holding means is provided on the tip side of the two rotating shafts arranged in parallel.
Further, in claim 7, the position holding means is formed in a plate shape in which the cross-sectional shape of the outer peripheral surface is substantially the same as the cross-sectional shape of the inner peripheral surface of the screw port or the like, two of which are provided side by side in a communicating manner.
An example is shown in which the pair of screw ports and the like are formed to have a size that allows interior fitting with a slight gap left therebetween. In addition, the eighth aspect exemplifies that the cleaning means is provided with one of the two rotating shafts juxtaposed to each other and the other of which is offset in position. Furthermore, claim 9 exemplifies that a brush is used as the cleaning means. In addition, claim 10 exemplifies that a rotation synchronizing mechanism for synchronizing and rotating between two rotating shafts arranged in parallel is provided, and one of the pair of rotating shafts is associated with the rotation driving means. . Then, claim 11 exemplifies that the base end sides of two rotating shafts arranged in parallel are detachably attached to the installation support base. Further, claim 12 exemplifies that a reversing mechanism for reversing the pair of rotation shafts by 180 ° is provided between the two rotation shafts arranged in parallel and the installation support base. Furthermore, claim 13
Then, it is exemplified that the traveling means is provided at the lower end of the mounting support base.

Next, in order to achieve the first object, according to claim 14 of the present invention, a rotary shaft provided with a cleaning means is gradually provided from the front side to the rear side of the screw mouth of the barrel in the kneading extruder. When cleaning the screw mouth etc. by inserting it deeply, by inserting the rotating shaft equipped with the cleaning means into the screw mouth etc., and by the action of the position holding means provided in a non-interlocking state with the rotating shaft, the inside of the screw mouth etc. With the rotary shaft almost aligned with the axis of the screw mouth, etc., the rotation drive means linked to the rotary shaft causes the rotary shaft to rotate and the screw mouth is provided on the rotary shaft for cleaning. The gist is a method for cleaning a screw port of a barrel in a kneading extruder that is cleaned by means.

[0010] Finally, in order to achieve the second object, according to claim 15 of the present invention, from the front side to the rear side of a screw mouth or the like in which two barrels of a twin-screw kneading extruder are arranged in parallel in a communicating manner. On the side, the two rotating shafts provided side by side with cleaning means are gradually inserted deeply, and when cleaning a pair of screw ports and the like at the same time, the two rotating shafts provided with cleaning means are arranged side by side. By inserting the rotary shaft into the pair of screw ports, respectively, and by the action of the position holding means provided in a non-interlocking state with the pair of rotary shafts, the pair of rotary shafts inside the pair of screw ports, etc. The pair of rotary shafts are rotated substantially by the action of the rotary drive means linked to the pair of rotary shafts in a state of being substantially aligned with the axial center, and a pair of screw ports and the like are provided on the pair of rotary shafts, respectively. I will clean it at the same time with cleaning means And gist cleaning method of the screw hole or the like of the barrel in the kneading extruder to.

[0011]

With such a cleaning device for the screw port of the barrel of the kneading extruder, for example, when the screw port of the barrel of the kneading extruder is to be cleaned, the following work is performed. It is a thing. First, in either a single-screw kneading extruder or a twin-screw kneading extruder, the heating means in which the residue mainly containing the synthetic resin material remaining in the screw mouth of the barrel from which the screw shaft is removed is placed in the barrel is heated. When the rotary shaft equipped with the cleaning means is inserted into the screw mouth of the barrel from the front side to the rear side while the molten state is maintained, the rotary shaft acts on the axis of the screw mouth in the screw mouth by the action of the position holding means. The position is maintained in a state of being substantially aligned with. Then, in this state, while rotating the rotary shaft by the action of the rotation driving means, the rotary shaft was gradually and deeply inserted from the front side to the rear side of the screw mouth of the barrel, and the screw mouth was provided on the rotary shaft. Even if the residue left at the screw mouth by the cleaning means is, for example, a high-viscosity synthetic resin material as a main component, it can be reliably cleaned without leaving the residue. In this case, in particular, in the twin-screw kneading extruder, when two rotating shafts arranged in parallel are rotated at the same time, it is possible to simultaneously clean two screw ports arranged in parallel so as to partially communicate with each other. is there. On the other hand, after cleaning the residue mainly consisting of the synthetic resin material remaining in the screw mouth in the molten state, cool the residue or wait for the residue to cool and become solidified, and then clean the stearic acid etc. It may be finished and cleaned with an activator. At this time, a cleaning activator such as stearic acid penetrates between the inner peripheral surface of the screw mouth and the residue to promote the separation of the residue from the screw mouth.

By the way, in such a cleaning device for the screw port of the barrel in the kneading extruder, in addition to the screw port of the barrel in the kneading extruder, it is possible to clean various long openings such as a circular cross section or a polygonal cross section. it can. In particular, it is a preferable mode for simultaneously cleaning various long openings in which two or more parts other than the screw port of the barrel in a twin-screw kneading extruder are arranged in parallel so as to communicate with each other.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a cleaning device for a screw port of a barrel and a cleaning method using the same in a kneading extruder according to the present invention will be described with reference to the accompanying drawings.

In the illustrated embodiment, the case of simultaneously cleaning a pair of screw ports of a barrel in a twin-screw kneading extruder will be described as an example.

First, in such a twin-screw kneading extruder, for example, a synthetic resin material is mixed with another material such as a plasticizer, a stabilizer, a flame retardant, glass fiber or a pigment to produce a molding material. It is used in some cases. Then, in such a twin-screw kneading extruder, in a pair of screw ports penetrating the synthetic resin material and one or more other materials in the axial direction of the barrel, two screw shafts respectively provided in the pair of screw ports are provided. It is rotated and kneaded at the same time.

On the other hand, in such a twin-screw kneading extruder, when the synthetic resin material is mixed with one or more other materials, at least one of the synthetic resin material and the one or more other materials, particularly the pigment When trying to change the color type,
Each time, it is necessary to clean the pair of screw openings and the two screw shafts provided inside the two screw shafts of the barrel. In this case, since the barrel is generally fixedly attached to the machine side of the twin-screw kneading extruder, the screw shaft is removed from the machine side, and the pair of screw ports of the barrel and the two screw shafts are respectively removed. They are cleaned separately.

In the twin-screw kneading extruder, as shown in FIGS. 1 to 3 and 6 to 8, the screw ports 2 and 2 of the barrel 1 each have a circular cross-section over the entire length, and a part of the screw port is in a communication state. Two of them are juxtaposed to each other to form an 8-shaped cross section. In some twin-screw kneading extruders, as shown in FIG. 8, the screw ports 2 and 2 of the barrel 1 are partially formed with hexagonal cross-sections having the same inner diameter in circular cross-sections. . By the way, a pair of screw ports 2 of the barrel 1,
In general, 2 has a long inner diameter of about 20 to 150 mm and a length of about 3000 mm. Incidentally, in the figure 3,
Reference numeral 3 is a tightening plate formed on both ends of the barrel 1.
The barrel 1 is fixedly attached to the machine side of the twin-screw kneading extruder using one of the fastening plates 3 and 3, and the die is detachably attached to the other of the fastening plates 3 and 3. To be In addition, reference numerals 4 and 4 in the drawing are engagement recesses formed on both end surfaces of the barrel 1 so as to face the pair of screw openings 2 and 2. By the way, the barrel 1 is fixedly attached to the machine side of the twin-screw kneading extruder by using one of the fastening plates 3 and 3 formed at both ends as described above, and The die is removably attached to the other side. The engaging recesses 4 and 4 formed on both end surfaces are engaged with the engaging protrusions formed on the machine body and the engaging protrusions formed on the die side, respectively. Then, the barrel 1 is positioned and mounted on the machine side of the twin-screw kneading extruder, and at the same time, the die is positioned and mounted on the barrel 1. still,
1 and 2, although the body of the twin-screw kneading extruder is continuous on the right side of the barrel shown as 1 in the drawings, the illustration is omitted. Further, reference numeral 5 in the drawing denotes a mounting support base for supporting the barrel 1.

Next, a cleaning device for the screw port of the barrel in the kneading extruder according to the present invention will be described. The cleaning device for the screw mouth of the barrel in this kneading extruder is provided in parallel with brushes 11, 11 shown as 10, 10 in the drawing, which are cleaning means formed of a metal material such as iron or brass. The two rotating shafts are linked to a motor that serves as a rotation driving means, and the pair of rotating shafts 10 and 10 are respectively connected to the screw ports 2 and 2 in the barrel 1 of the twin-screw kneading extruder. A pair of rotation shafts for holding the position holding means 12 for holding the position substantially along the axis of 2
It is provided in a non-interlocking state on 10 and 10.

The position holding means 12 shown in the figure is provided on the tip side of two rotating shafts 10, 10 arranged in parallel as shown in FIGS. A screw port 2 in which two parts of the barrel 1 of the extruder are arranged side by side so as to communicate with each other,
2 is formed into a plate shape in which the cross-sectional shape of the outer peripheral surface substantially matches the cross-sectional shape of the inner peripheral surface of 2, that is, the cross-sectional shape is formed by partially superimposing a circular shape, and a pair of screw ports 2 2 is formed in such a size that a slight clearance is left in the interior so that the interior can be installed. Then, the plate-shaped position holding means 12 rotatably inserts the pair of rotary shafts 10 and 10 on the axial centers of the portions whose cross-sectional shapes are circular, respectively, to form the pair of rotary shafts 10 and 10.
As described above, it is attached in a non-interlocking state. On the other hand, the plate-shaped position holding means 12 includes a pair of screw ports 2,
2, the pair of screw openings 2 and 2 are formed in a circular cross section over the entire length as shown in FIG. 7, or a hexagonal cross section is formed in each circular cross section as shown in FIG. Even if the shaped portion is partially formed, it is formed in such a size that a slight gap is formed between the inner peripheral surface and the outer peripheral surface of the pair of screw ports 2, 2. . The gap formed here is preferably in the range of 0.1 to 5 mm, preferably 0.5 to 2.5 mm. Here, if the gap exceeds 5 mm, the effect of holding the positions of the pair of rotary shafts 10 and 10 in the pair of screw ports 2 and 2 substantially along the axial centers of the screw ports 2 and 2 cannot be expected. . That is, a pair of rotary shafts 10 provided with brushes 11 serving as cleaning means are inserted into the pair of screw openings 2 of the barrel 1 gradually from the front side to the rear side to form a pair of screw openings. A problem remains in sure cleaning without leaving a highly viscous residue mainly composed of the molten synthetic resin material remaining in 2 and 2.
Further, the brushes 11 serving as cleaning means may be partially worn or deformed. On the other hand, if the gap is less than 0.1 mm, the residue remaining in the screw ports 2 and 2 has a high viscosity as described above, and therefore the viscous resistance of the residue makes the cleaning operation troublesome and the cleaning time longer. The effect of shortening can not be expected. By the way, the plate-shaped position holding means 12
Is made of brass, aluminum, or other metal material having a hardness lower than that of the barrel 1 which is usually made of steel, which damages the pair of screw openings 2, 2 of the barrel 1 during the cleaning operation. It can be said that it is preferable because it is rare and the residue can be easily removed.

The brushes 11, 11 serving as cleaning means are provided with a pair of rotary shafts 10, 10 arranged side by side and provided with plate-shaped position holding means 12, and a pair of rotary shafts 10 are provided behind the rotary shafts 10, 11. , 10 are attached to one side and the other side one by one, respectively. By the way, since the brushes 11, 11 that are the cleaning means rotate in conjunction with the pair of rotary shafts 10, 10, the plate-shaped position holding means 12 provided in a non-interlocking state with the pair of rotary shafts 10, 10 The brushes 11, 11 serving as cleaning means, which are provided with a space in the back, can be rotated in a pair of screw openings 2 and 2 about the axial center of the screw openings 2 and 2. It is preferable that the position holding means 12 and the position holding means 12 are provided at an interval of 5 to 50 mm, preferably 10 to 30 mm. Here, if the distance exceeds 50 mm, it becomes difficult to rotate the brushes 11 serving as cleaning means within the pair of screw openings 2 and 2 around the axes of the screw openings 2 and 2, and the pair of screw openings 2 and 11 becomes difficult. This is a problem for sure cleaning without leaving a residue on the screw ports 2 and 2. On the other hand, the interval is 5
If it is less than mm, the brushes 11, 11 serving as cleaning means may be deformed during the cleaning work, and the hairs may forcibly contact the plate-shaped position holding means 12, and the brushes 11, 11 serving as cleaning means.
Shortens the life of.

On the other hand, the brushes 11 serving as the cleaning means have a length of 5 to 100 mm, preferably 10 to 40 mm. Here, if the length exceeds 100 mm, the viscous resistance of the residue remaining in the pair of screw ports 2 and 2 increases, not only the cleaning time becomes long, but also the motor serving as the rotation driving means has high output. Will be required.
On the other hand, if the length is less than 5 mm, a problem remains in sure cleaning without leaving a residue on the pair of screw ports 2 and 2.

Two rotary shafts 10 and 10 arranged side by side as shown in FIG.
Is rotatably supported on the base end side by a set of plate-shaped mounting members 13, 13, and the side facing downward of the mounting members 13, 13 is a set of receiving members provided on the upper surface of the installation support base 14. The members 15 and 15 are engaged with the engaging grooves 16 and 16 opened above, and as a result, the tip end side is protruded from the installation support base 14 by at least the length of the barrel 1 and cantilevered. Reference numeral 17 in the drawing is a mounting member near the side ends on the base end side of the pair of rotary shafts 10, 10.
A motor, which serves as a rotation driving means, is attached to the motor shaft 13. The motor shaft of the motor is directly connected to one of the pair of rotary shafts 10, 10. Reference numeral 18 in the drawing denotes a bearing mounted on a mounting member 13 on which a motor 17 serving as a rotation driving means is mounted, which rotatably supports the other side end of the pair of rotary shafts 10, 10 at the base end side. Is. Further, in the figure, 19 and 19 are a pair of rotary shafts 1.
It is a drive transmission gear that serves as a rotation synchronizing mechanism that is externally fitted and attached to each of 0 and 10 to rotate in synchronization. And
When a motor 17, which is a rotation driving means linked to one of the pair of rotary shafts 10 and 10, is rotated, the other rotates in synchronization with one of the pair of rotary shafts 10 and 10.
Reference numeral 20 in the drawing denotes a caster provided at the lower end of the installation support base 14 as a traveling means. In addition, reference numerals 21 and 21 in the drawing denote receiving bases for supporting a motor 17 serving as a rotation driving means provided on the upper surface of the installation supporting base 14 from below. Then, the pair of rotating shafts 10 and 10 are configured such that the pair of mounting members 13 and 13 are integrally removed from the installation support base 14 and the pair of rotating shafts 10 and 10 are inverted by 180 ° to set the pair of mounting members 13 and 13. Again, the side facing downward of 13 is received member 15,
It can be engaged with 15 engaging grooves 16, 16. That is, a reversing mechanism for reversing the pair of rotary shafts 10, 10 by 180 ° is a set of mounting members 13, 13 and a set of receiving members 1.
It is composed of 5 and 15. By the way, a pair of rotating shafts 1
0 and 10 are a set of mounting members 13, 13 when engaging the engaging grooves 16, 16 of the receiving members 15, 15 provided on the upper surface of the installation support base 14,
The height is such that the whole is substantially along the axis of the pair of screw ports 2 and 2 of the barrel 1 supported on the upper surface of the mounting support 5.

Thus, in the cleaning device for the screw port of the barrel and the like in such a kneading extruder, two screw ports 2, 2 in which a part of the barrel 1 from which the pair of screw shafts are removed are arranged side by side in a communicating manner. When cleaning is to be performed, the work is performed as follows. First, a heating means having a residue mainly composed of a synthetic resin material remaining in the pair of screw openings 2 and 2 of the barrel 1 inside the barrel 1 is brought into a heating state and remains in a molten state, and a brush 11 serving as a cleaning means, Two rotating shafts 10, 10 provided side by side each having 11 are inserted into the pair of screw openings 2, 2 of the barrel 1 by moving the installation support base 14 from the front side to the rear side and inserting a pair of rotation shafts. Axis 1
By the action of the position holding means 12, 0 and 10 are held in the pair of screw ports 2 and 2 in positions substantially along the axial centers of the screw ports 2 and 2, respectively. Then, in this state, while rotating the pair of rotary shafts 10, 10 in synchronization with each other by the action of the motor 17 serving as the rotation driving means, the installation support base 14 is further moved to move the pair of rotary shafts 10, 10 into the barrel. 1
The pair of screw openings 2, 2 are gradually inserted deeper from the front side to the rear side. By doing so, the pair of screw ports 2 and 2 simultaneously move to the pair of rotary shafts.
Brushes 11 and 11 which are cleaning means provided in 10 and 10 respectively
Thus, even if the residue remaining in the screw ports 2 and 2 is mainly composed of a molten synthetic resin material and has high viscosity, the residue can be reliably cleaned without leaving the residue. By the way, the residue remaining in the pair of screw ports 2 and 2 may be maintained in a molten state by the residual heat remaining in the barrel 1 or the heating means without bringing the heating means into the heated state. After that, a cloth piece may be further wound around the brushes 11 serving as cleaning means to perform the final cleaning. In addition, after cleaning the residue mainly composed of the synthetic resin material remaining in the pair of screw ports 2 and 2 in a molten state, after cooling, the residue is cooled or waits for the residue to cool and solidify. Finish cleaning may be performed using a cleaning activator such as stearic acid.
At this time, a cleaning activator such as stearic acid penetrates between the inner peripheral surfaces of the screw openings 2 and 2 and the residue to promote the separation of the residue from the pair of screw openings 2 and 2.

When attempting to clean the pair of screw ports 2 and 2 of the barrel 1 in such a twin-screw kneading extruder, the residue mainly composed of the synthetic resin material remaining in the pair of screw ports 2 and 2 is removed. The heating means incorporated in the barrel 1 is brought into a molten state by heating it or the like. For example, when the synthetic resin material is polyethylene terephthalate, it is 25
It is in a molten state within the range of 0 to 300 ° C, and 150 to 200 ° C for vinyl chloride. At this time, even if the melting temperature exceeds these values, the effect of improving the cleaning state is not observed, and conversely, if the melting temperature is less than these, there may be a problem in reliably cleaning without leaving a residue.

In the cleaning device for the screw port of the barrel and the like in the illustrated kneading extruder, the brush 11, which is the cleaning means,
The two rotating shafts 10 and 10 that are arranged in parallel with 11 respectively,
By moving the installation support table 14 supporting it on the upper surface, it can be transported to a desired place and a pair of rotary shafts
When 10 and 10 are supported by the installation support base 14, the height of the whole is substantially along the axis of the pair of screw ports 2 and 2 of the barrel 1 supported on the upper surface of the mounting support base 5. Therefore, by simply adjusting the directions of the pair of rotary shafts 10, 10, in combination with the action of the plate-shaped position holding means 12, the cleaning work of the pair of screw ports 2 and 2 of the barrel 1 can be performed easily and further. Since the cleaning can be performed reliably and the pair of screw ports 2 and 2 can be cleaned at the same time, the cleaning time can be shortened, which is effective in improving the original operation efficiency of the twin-screw kneading extruder. Further, since the base end sides of the pair of rotary shafts 10 and 10 can be detachably attached to the installation support base 14 through a reversing mechanism for reversing 180 °, the pair of rotary shafts 10 and 10 are provided. Even if the brushes 11 serving as cleaning means are partially worn or deformed, by reversing the pair of rotating shafts 10 and inserting them again into the pair of screw ports 2 and 2, It is possible to reliably clean the screw ports 2 and 2.

Regardless of the illustrated embodiment, the position holding means 12 can be formed in a plate shape, a spherical shape, or another shape. Further, the position holding means 12 can also be provided in a portion other than the tip end side of the pair of rotary shafts 10, 10. Further, the position holding means 12 may be provided independently of each other without being provided over both the pair of rotary shafts 10, 10.

On the other hand, it is also considered that two or more brushes 11 serving as cleaning means are provided on the pair of rotary shafts 10 respectively.

The cleaning device for the screw port of the barrel in such a kneading extruder is provided with only one rotary shaft 10, so that it can be used as both a single-screw kneading extruder and a double-screw kneading extruder. It is also possible to

On the other hand, in the cleaning device for the screw port of the barrel in such a kneading extruder, in addition to the screw ports 2, 2 of the barrel 1 in the kneading extruder, various long openings such as circular or polygonal cross section are provided. Can be cleaned.
In particular, this is a preferable mode for simultaneously cleaning various long openings in which two or more parts other than the screw ports 2 and 2 of the barrel 1 in the twin-screw kneading extruder are arranged in parallel so as to communicate with each other. .

[0030]

As described above, in the cleaning device for the screw port of the barrel in the kneading extruder according to the present invention, for example, when cleaning the screw port of the barrel in the kneading extruder, a cleaning means is provided. By simply inserting the rotary shaft into the screw mouth gradually from the front side to the rear side, the position of the rotary shaft is maintained along the axis of the screw mouth by the action of the position holding means. Therefore, the cleaning means can be rotated about the axial center of the screw port, and the cleaning can be reliably performed without leaving a residue on the screw port. Further, since the position holding means is provided in a non-interlocking state with the rotating shaft,
There is little damage to the screw mouth during cleaning work. In particular, since it is possible to simultaneously clean the screw ports of two barrels of a twin-screw kneading extruder that are arranged side by side in a communicating manner, the cleaning time is shortened and the original operation of the twin-screw kneading extruder is reduced. It is also effective in improving efficiency.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a screw port of a barrel of a kneading extruder according to the present invention is cleaned by a cleaning device of a screw port of a barrel of a twin-screw kneading extruder.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view showing a state in which the barrel of the twin-screw kneading extruder is supported on the upper surface of the mounting support table.

FIG. 4 is a perspective view showing a main part of a cleaning device for cleaning a screw port of a barrel in the kneading extruder according to the present invention.

FIG. 5 is a cross-sectional plan view showing a main part of a state in which a screw port of a barrel of a kneading extruder according to the present invention is cleaned by a cleaning device of a screw port of a barrel of a twin-screw kneading extruder.

FIG. 6 is a sectional perspective view showing a main part of a barrel in a twin-screw kneading extruder.

[Fig. 7] Similarly, a vertical side view

FIG. 8 is a vertical sectional side view showing another embodiment of the same.

FIG. 9 is a partially omitted explanatory view showing a cleaning device such as a screw port of a barrel in a conventional kneading extruder.

[Explanation of symbols]

 1 Barrel 2 Screw port 3 Tightening plate 4 Engagement recess 5 Placement support 6 Rotation shaft 11 Brush 12 Position holding means 13 Mounting member 14 Installation support 15 Receiving member 16 Engagement groove 17 Motor 18 Bearing 19 Drive transmission gear 20 casters 21 cradle

Claims (15)

[Claims] 1. A cleaning device for cleaning a screw port or the like by gradually inserting a rotary shaft equipped with a cleaning device from the front side to the rear side of a screw port or the like of a barrel in a kneading extruder to clean the screw port or the like. The rotation driving means is linked to the provided rotation shaft, and the position holding means for holding the position of the rotation shaft substantially along the axial center of the screw mouth inside the screw mouth is provided in a non-interlocking state with the rotation shaft. Cleaning device for the screw port of the barrel in the kneading extruder. 2. A cleaning device for a screw port of a barrel in a kneading extruder according to claim 1, wherein the position holding means is provided on the tip side of the rotary shaft. 3. The position holding means is formed in a plate shape whose cross-sectional shape of the outer peripheral surface is substantially the same as the cross-sectional shape of the inner peripheral surface of the screw mouth or the like, and can be internally provided with a slight gap left in the screw mouth or the like. A cleaning device for a screw port of a barrel in the kneading extruder according to claim 1 or 2, which is formed to have a size. 4. The cleaning device according to claim 1, wherein a brush is used.
A cleaning device for the screw port of the barrel and the like in the kneading extruder of 3. 5. Two rotating shafts, which are provided side by side with cleaning means, from the front side to the rear side of a screw port or the like in which two barrels in a twin-screw kneading extruder are arranged side by side so as to communicate with each other. Is gradually inserted deeply, and a cleaning device for cleaning a pair of screw ports and the like at the same time. A device for cleaning a screw port of a barrel in a kneading extruder, in which position holding means for holding a pair of rotary shafts inside the machine are arranged along the axial centers of the screw ports in a non-interlocking state with the pair of rotary shafts. . 6. A cleaning device for a screw port of a barrel in a kneading extruder according to claim 5, wherein the position holding means is provided on the tip side of the two rotary shafts arranged in parallel. 7. The position holding means is formed in a plate shape in which the cross-sectional shape of the outer peripheral surface is substantially the same as the cross-sectional shape of the inner peripheral surface of the screw port or the like, two of which are partially arranged side by side so as to communicate with each other. The cleaning device for the screw port of the barrel in the kneading extruder according to claim 5 or 6, wherein the screw port and the like are formed to have a size such that a small gap is left in the screw port. 8. A cleaning device for cleaning a barrel screw port or the like in a kneading extruder according to claim 5, wherein the cleaning means is provided with one of the two rotating shafts arranged side by side and the other being offset in position. . 9. The cleaning device according to claim 5, wherein a brush is used.
8. A cleaning device for a screw port of a barrel and the like in the kneading extruder of 8. 10. The rotation synchronization mechanism for synchronizing and rotating between two rotation shafts arranged in parallel, and the rotation driving means is linked to one of the pair of rotation shafts. Cleaning device for the screw port of the barrel in the kneading extruder. 11. The cleaning device for a screw port of a barrel in a kneading extruder according to claim 5, wherein the base end sides of two juxtaposed rotary shafts are detachably attached to an installation support base. 12. The kneading extruder according to claim 11, wherein a reversing mechanism for reversing the pair of rotating shafts by 180 ° is provided between the two rotating shafts arranged side by side and the installation support base. Cleaning device. 13. The cleaning device for a screw port of a barrel in a kneading extruder according to claim 11, wherein a traveling means is provided at a lower end of the mounting support table. 14. A cleaning device is provided when cleaning a screw port or the like by gradually inserting a rotary shaft equipped with a cleaning device from the front side to the rear side of a screw port or the like of a barrel in a kneading extruder to clean the screw port or the like. By inserting the rotary shaft into the screw mouth, etc., the position holding means provided in a non-interlocking state with the rotary shaft causes the rotary shaft to be almost aligned with the axis of the screw mouth etc. inside the screw mouth etc. Then, by the action of the rotation drive means linked to the rotary shaft, the rotary shaft is rotated, and the screw mouth and the like are cleaned by the cleaning means provided on the rotary shaft. Method. 15. Two rotating shafts, which are provided side by side with cleaning means, from a front side to a rear side of a screw port or the like in which two barrels in a twin-screw kneading extruder are arranged side by side so as to communicate with each other. When gradually cleaning the pair of screw openings, etc. at the same time, the two rotating shafts equipped with cleaning means and arranged in parallel are respectively inserted into the pair of screw openings, etc. By the action of the position holding means provided in a non-interlocking state, the pair of rotary shafts are made to lie substantially along the axial centers of the screw ports and the like inside the pair of screw ports and are linked to the pair of rotary shafts. By the action of the rotation driving means, the screw mouth of the barrel in the kneading extruder, which is rotated and simultaneously cleaned by the cleaning means provided with the pair of rotary shafts and the pair of rotary shafts, respectively. How to clean .