JPH07173762A - Hot roll press device for smoothing surface of endless belt and method for heat-setting using the same press device - Google Patents

Abstract

PURPOSE:To provide a hot press device for smoothing the surface of an endless belt and a method for smoothing and heat-setting the surface of the endless belt using the device. CONSTITUTION:This hot roll press device for smoothing the surface of an endless belt 10 is capable of passing the running endless belt 10 through a space between a hot roll 2 and a press pedestal 9, hot-pressing and smoothing the surface of the belt. In the device, a hot press roll having a smaller surface length of the roll than the width of the press pedestal is installed so as to arrange the shaft line of the roll parallel to the running surface of the endless belt and tilted at <=90 deg. angle from the running direction of the endless belt and further enable the movement in the width direction of the endless belt. Furthermore, this method for hot-pressing the endless belt, smoothing and heat- setting the surface is to use the device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless belt, and particularly to a hot roll pressing apparatus for smoothing the surface of an endless belt such as a papermaking fabric having a wide width and a small thickness, and surface smoothness is important. The present invention relates to a heat setting method using a hot roll press device.

[0002]

2. Description of the Related Art A hot roll pressing device for smoothing the surface of an endless belt and a heat setting method using the hot roll pressing device have been proposed in the past and are known to be effective. However, in the conventional proposal, heating and pressing are performed between a drive roll or a tension roll, which is a roll of a heat setting device, and a hot roll having a surface length substantially the same as those of these rolls, so that the width is 5 m or more. It was impossible to heat and press uniformly an endless belt having a wide width such as a thickness of 1 mm or less and a small thickness in the width direction to perform heat setting.

This is because it is very difficult to apply the same pressure while keeping a very small gap between the rolls over the entire width of the roll due to the problems of flatness and flexure of the rolls. Especially for papermaking fabrics, if the thickness is different by more than 10μ, there is a risk of marks on the paper.
It is required to suppress it to a certain degree, and further, it is strongly required to improve the surface property. For that purpose, while suppressing the difference in the gap between the rolls in the width direction to within several μ, the press pressure of at least 15 Kg / cm is uniformly applied over the entire width to perform heat setting, and the difference in the thickness of the fabric is determined. At 10μ
Within the range, the height difference of the yarn protruding on the surface forming the fabric is eliminated, and the surface contact area of the protruding yarn is pressed to be flat to increase the surface property. It must be. However, it was impossible with the current roll making technology due to the problems of flatness and deflection.

Further, since the total pressing pressure of the full width becomes a considerably large pressure, the apparatus becomes large in size, and a new hot roll press is added to the heat set device where the hot roll press device was not installed. There was also a problem that when installing the device, the frame had to be modified so that it could withstand the press pressure. Also,
Since the hot roll becomes very expensive as the surface length becomes long, there is a big cost problem.

[0005]

In view of the above problems, the present invention provides an endless belt as a whole having a wide width and a thin thickness by using a hot roll having a roll surface length shorter than the width of a press pedestal. The present invention provides a hot roll pressing device that makes the surface of an endless belt smooth by heating and pressing at a low cost, and a heat setting method using the hot roll pressing device.

[0006]

Means for Solving the Problems The present invention provides "1. A hot roll press for smoothing the belt surface by heating and pressing between a hot roll provided with opposing running endless belts and a press pedestal. In the apparatus, a hot press roll whose surface length is shorter than the width of the press pedestal is inclined at an angle of 90 ° or less with the axis of the roll parallel to the running surface of the endless belt and the running direction of the endless belt. A hot roll press device for smoothing the surface of the endless belt, which is arranged so as to be movable in the width direction of the endless belt. A hot roll press that smoothes the surface of the endless belt described in 3. 3. A hot roll having a tapered shoulder. 4. A hot roll press device for smoothing the surface of the endless belt described in item 1 or 2. 4. The hot roll rolls in the belt running direction provided on a moving table that moves the roll in the width direction of the belt. The surface of the endless belt described in any one of items 1 to 3 is rotatably supported by a supporter movable in the vertical direction by a hydraulic cylinder arranged on a roll rotating table that tilts the axis line of 5. A hot roll press machine for making the surface of the endless belt described in any one of items 1 to 4 in which a moving table is placed on a moving device that moves the entire pressing device. Roll press device 6. The end tray according to any one of items 1 to 5, wherein the press pedestal is a roll arranged to face the hot roll. 7. A hot roll press device for smoothing the surface of a belt 7. The endless belt according to any one of items 1 to 6, wherein the press pedestal is a plate-like member arranged facing the hot roll. 8. A hot roll press that smoothes the surface of the roll 8. The endless belt that is stretched over the tension support roll is run through the hot roll whose axis is inclined with respect to the running direction of the endless belt and the pedestal so that the hot roll is endless. A method for heat-setting the surface of an endless belt smoothly, which comprises moving the belt in the width direction and heating and pressurizing it while making spiral contact with the surface of the endless belt. "

[0007]

The first feature of the present invention is that the endless belt is heated and simultaneously pressed by the hot roll pressing device. Since the endless belt is completely heat-set while the surface is pressed smoothly, the endless belt can maintain a smooth state even after being pressed.

The second feature is that the surface length of the hot roll is short. Since the surface length of the hot roll is short, the hot roll does not bend and the accuracy of the flatness of the roll surface can be increased. Further, since it is not easily affected by the deflection of the press receiver and the accuracy of flatness, a small gap can be maintained between the hot roll and the press receiver. Also, since the total press pressure can be lowered, the deflection of the roll can be further reduced, the apparatus can be reduced in size, and the production can be performed at low cost. The press cradle is
It has a function of receiving the pressure of the hot roll via the endless belt to be processed, and may be a rotating roll or a plate-like body.

A third feature is that the hot roll heats and pressurizes while moving in the width direction of the endless belt as the endless belt runs. As a result, even the endless belt having a width wider than the surface length of the hot roll can be uniformly heated and pressed in a spiral shape,
It can be used for endless belts of any width.

The hot roll is a roll whose surface length is shorter than the width of the pedestal. This roll is arranged so that its axis is parallel to the running surface of the endless belt and is inclined at an angle of 90 ° or less with respect to the running direction of the endless belt, and it can slide in the width direction of the endless belt. It is installed in. Therefore, when the hot roll is moved in the width direction of the belt while being pressed and heated by the hot roll while rotating the endless belt, the belt is sequentially hot pressed into a spiral shape. The process can be repeated as many times as necessary. Since a short hot roll is used, it is easy to move in the width direction of the belt. Due to these characteristics, the thickness of the fabric is made uniform throughout the fabric, the height difference of the yarns protruding on the surface forming the fabric is eliminated, and the surface contact area of the protruding yarns is pressed. By making the surface flat, it is possible to increase the size and improve the surface property. Next, specific examples will be described with reference to the drawings in Examples.

[0011]

1 and 2 show a hot roll pressing apparatus according to an embodiment of the present invention. 2 is hot roll, 3
Is a hot roll support tool, 4 is a hydraulic cylinder, 5 is a rotary table, 6 is a moving table, 7 is a moving rail, and 8 is a hot roll press device moving device. The hot roll 2 is rotatably supported by the hot roll support 3. In this embodiment, an induction heating type roll capable of generating heat at 70 ° C. or higher is used, which has a surface length of 300 mm and a diameter of 120 mm. The effective surface length of the press is 220 mm because 40 mm at both ends of the roll is processed into a taper shape. The hot roll support 3 is moved upward by 5K by the two hydraulic cylinders 4.
It has a structure capable of pressurizing to g / cm or more. The hydraulic cylinders 4 were installed on the rotary table 5 at intervals substantially equal to the surface length of the hot roll 2. The turntable 5 is rotatably installed on the moving table 6. By rotating the rotary table 5, the axis of the hot roll is displaced from the running direction of the endless belt. The turntable 6 is movably installed on the moving rail 7, and the hot roll 2 moves when the moveable table 6 moves. With this structure, it is possible to move in the width direction of the endless belt. The hot roll press device moving device 8 is installed at the bottom of the moving rail 7, and the hot roll press device 1 itself can be moved. In this example, a table provided with casters was used. Since the hot roll press machine 1 itself can be moved, it can be set and used when necessary and stored when not in use. Also, one hot roll press machine can handle multiple heat setting machines. It is also possible to do. When actually performing heat setting, the moving rail 7 is set parallel to the width direction of the endless belt 10 so that the endless belt 10 is sandwiched between the rail and the press receiving member.

3 to 5 show a heat setting method using the hot roll pressing apparatus which is one embodiment of the present invention described above. In the drawing, for convenience, only the hot roll 2 of the hot press roll device 1 is shown. In this example, the hot roll press apparatus of the present invention was set to a normal heat setting measure for stabilizing the posture and tissue by heating the endless belt while applying tension.

FIG. 3 is a view seen from the width direction of the endless belt. 2 is a hot roll and 9 is a drive roll
And the endless belt 10 is pressed and heated to be processed. Numerals 9 and 9'indicate rolls of a normal heat setting device, 9 is a drive roll for rotationally driving the endless belt, and 9'is rotatable and applies tension to the endless belt which is movable in the left and right directions in the drawing. It is a tension roll. In this embodiment, the drive roll 9 also functions as a press pedestal. Both drive rolls and tension rolls have a surface length of 2,000 mm and a diameter of 300.
mm.

In this embodiment, the rolls are arranged in this way,
Although the size is set, the size is not limited to this, and the hot roll 2 may be arranged above the drive roll 4 and pressed downward, or may be lateral. Needless to say, the size is not limited to this and can be freely selected. However, the surface length of the hot roll 2 is 1,000 mm or less, which means that there is no bending in the roll surface length direction and flatness accuracy is improved. It is preferable because it makes it good. Further, the pressurizing method and the heating method of the hot roll 2 are not limited to this, and there is no particular problem as long as they can be appropriately performed. Further, the heater device 11 and the tenter device 12 installed in the normal heat setting device may be used simultaneously with the normal heat setting.

FIG. 4 is a view of the apparatus of FIG. 3 as seen from below. From the drawing, it can be understood that the axis of the hot roll 2 is arranged so as to be displaced by an angle φ with respect to the width direction of the endless belt 10. Since the running direction of the endless belt and the axis of the hot roll are deviated by an angle φ, the force applied to the hot roll 2 in the running direction generated by the running of the endless belt 10 causes the hot roll 2 to rotate and the endless belt 10. Since the force is transferred separately in the width direction, the hot roll 2 moves while rotating on the moving rail 7. The movement of the hot roll of the present embodiment is preferable because it is simple and possible at low cost, but it is not particularly limited to this, and the hot roll 2 is mechanically moved by using another moving device. You can also

The deviation angle φ is up to 10 degrees. If the angle is too large, it becomes longer than the surface length of the hot roll 2, and it becomes difficult to heat and press the entire endless belt 10. There is also a problem that the endless belt 10 and the hot roll 2 are in point contact with each other. Depending on the circumference of the endless belt 10 and the surface length of the hot roll 2, the deviation angle can be determined so that the hot roll 2 moves the same distance as the surface length of the hot roll 2 or a short distance while the endless belt 10 makes one revolution. preferable. When the angle is determined so as to move the same distance as the surface length of the hot roll 2, the hot roll 2 spirally contacts the endless belt 10 as shown by the dotted line on the endless belt 10 in FIG. It is possible to uniformly heat and pressurize. If the offset angle is determined so that the hot rolls move a short distance, the hot rolls will overlap at some portions, so multiple heating and pressurization can be performed. For example, by moving a distance of half, the entire endless belt 10 can be uniformly heated and pressed doubly.

Although only one hot roll 2 is used in this embodiment, heat setting can be performed in a short time by arranging a plurality of hot rolls 2 in the width direction of the endless belt 10, that is, on the moving rail 7. There is an advantage to be.

FIG. 5 is a view as seen from the running direction of the endless belt 10. Since the roll shoulder of the hot roll 2 is tapered so that the diameter becomes smaller toward the end, the corner of the roll shoulder of the hot roll 2 does not come into contact with the endless belt 10, so that a press mark is formed. It is well understood that it is not. This makes it possible to uniformly heat and press the entire endless belt 10 in a spiral shape.

FIG. 6 shows a heat setting method using a hot roll pressing apparatus according to another embodiment. Also in this example, the hot roll pressing apparatus was set to the ordinary heat setting apparatus. FIG. 6 shows an endless belt 10.
It is the side view seen from the width direction. Reference numeral 1 denotes a hot roll pressing device, and the hot roll pressing device of FIG. 2 has a cantilevered roll 13 having a surface length substantially the same as that of the moving rail 7 as a press cradle at which the hot roll 2 faces each other. It is installed in. In this embodiment, the roll 13 is also a hot roll capable of heating. The heat setting is performed by disposing the hot roll press device 1 between the drive roll 9 and the tension roll 9 '. Roll 1 in this example
Since 3 can also be heated, the endless belt 10 can be heated from the front and back together with the hot roll 2, and heat can be easily transferred to the inside of the endless belt 10 to improve the setting property. Further, by combining a plurality of the present embodiments or combining with the previous embodiment, a plurality of hot roll press devices can be arranged in the traveling direction of the endless belt 10 to perform heat setting.

As shown in FIG. 4, the widthwise ends of the endless belt 10 processed into a spiral shape are processed by making the axis of the hot roll parallel to the running direction of the belt and setting the deviation angle φ to 0. Is processed. After heat setting with a wide width, it may be cut into a predetermined size.

FIG. 7 shows a conventional example, in which heat and pressure are applied between the roll 9 of the heat setting device, which is a press receiver, and the hot roll 2 having substantially the same surface length. It is possible to heat and press the entire width of No. 10, but as described above, it is very difficult to maintain a small gap between the rolls with the entire width of the roll due to the problems of the flatness of the roll and the bending, which is a practical problem. There was.

FIG. 8 is a graph showing the thickness in the width direction after the endless belt of the papermaking fabric is actually heat set by the method shown in FIGS. 3 to 5. The papermaking fabric used in this example was already heat-set as usual1,
It has a width of 000 mm and a thickness of 0.70 mm. The heat setting conditions are a press pressure of 19 kg / cm, a shift angle of 0.5 degrees, and a roll heating temperature of 190 ° C. The moving amount of the hot roll is 110 mm, and the hot pressing is performed double. The results show that the difference in thickness in the width direction is less than 10 μm, there are no pressing marks on the shoulders of the hot rolls, and the effect of hot pressing has an average thickness of 0.6.
It was understood that good results were obtained because the entire surface was uniformly hot-pressed and smoothed because it was about 8 mm, which was thinner than 0.70 mm before heat setting. It

FIG. 9 is a graph showing the thickness in the width direction after heat setting the endless belt of the papermaking fabric by the conventional method shown in FIG. The hot roll has a face length of 1,
The papermaking fabric used had a diameter of 500 mm, a diameter of 240 mm, a width of 1,000 mm, and a thickness of 0.70 mm, which had been subjected to the usual heat setting as in the previous example. Pressing pressure is also 19 Kg /
cm, and the roll heating temperature is 190 ° C. Further, in order to meet the conditions, the endless belt is rotated twice so as to be double hot-pressed. As a matter of course, the shift angle is 0 degree and the movement amount of the hot roll is 0 mm. The results show that the difference in thickness in the width direction is more than 20μ, and the effect of hot pressing is effective in the area with a thickness of about 0.68 mm, but it is the same with 0.70 mm before the heat setting. Means that there is no effect at all, and it is understood that the entire surface is not uniformly hot-pressed and there is a serious problem in practical use.

[0024]

As described above, the present invention has a wide range,
Even an endless belt having a small thickness has an excellent effect that the whole surface can be heat-set evenly and smoothly at low cost.

[Brief description of drawings]

FIG. 1 is a view showing a hot roll pressing apparatus according to an embodiment of the present invention as seen from a roll surface length direction.

FIG. 2 is a view showing a hot roll pressing device according to an embodiment of the present invention as viewed from the roll rotating direction.

FIG. 3 is a view seen from the width direction of the endless belt, showing the heat setting method using the hot roll pressing apparatus according to the embodiment of the present invention.

FIG. 4 is a side view seen from below showing a heat setting method using the hot roll pressing apparatus according to the embodiment of the present invention.

FIG. 5 is a side view showing the heat setting method using the hot roll pressing apparatus according to the embodiment of the present invention, as viewed from the running direction of the endless belt.

FIG. 6 is a side view of the endless belt as viewed from the width direction, showing a heat setting method using a hot roll pressing apparatus according to another embodiment of the present invention.

FIG. 7 is a side view of a heat setting method using a hot roll, which is a conventional example, as viewed from a running direction of an endless belt.

FIG. 8 is a graph showing the thickness in the width direction of an endless belt actually heat-set by the heat-setting method using the hot roll pressing apparatus according to the embodiment of the present invention.

FIG. 9 is a graph showing the thickness in the width direction of an endless belt actually heat set by a heat setting method using a hot roll of a conventional example.

[Explanation of symbols]

 1 Hot Roll Pressing Device 2 Hot Roll 3 Hot Roll Supporting Device 4 Hydraulic Cylinder 5 Turntable 6 Moving Table 7 Moving Rail 8 Hot Roll Pressing Device Moving Device 9 Heat Setting Device Roll 9 ′ Heat Setting Device Roll 10 Endless Belt 11 Heater device 12 Tenter device 13 Roll

Claims (8)

[Claims] 1. Heating is performed by passing between a hot roll provided with running endless belts facing each other and a press pedestal,
In a hot roll press device that pressurizes the belt surface to make it smooth, a hot press roll whose surface length is shorter than the width of the press pedestal is used, with the axis of the roll parallel to the running surface of the endless belt and running of the endless belt. A hot roll press device for smoothing the surface of the endless belt, which is arranged so as to be movable in the width direction of the endless belt by inclining at an angle of 90 ° or less with respect to the direction. 2. The hot roll press device for smoothing the surface of the endless belt according to claim 1, wherein a tension support roll for stretching and running the endless belt is arranged. 3. The hot roll press device for smoothing the surface of the endless belt according to claim 1, which is a hot roll having a tapered roll shoulder. 4. A hot roll can be moved up and down by a hydraulic cylinder arranged on a roll turntable that tilts the axis of the roll with respect to the belt running direction provided on a moving stand that moves the roll in the width direction of the belt. 4. A rotatably supported rotatably supported device according to claim 1.
A hot roll press device for smoothing the surface of the endless belt described in the item. 5. The hot roll pressing device for smoothing the surface of the endless belt according to claim 1, wherein the moving table is mounted on a moving device that moves the entire pressing device. 6. The press cradle is a roll arranged to face the hot roll, according to claim 1.
A hot roll press device for smoothing the surface of the endless belt described in the item. 7. The hot roll press for smoothing the surface of the endless belt according to claim 1, wherein the press pedestal is a plate-like member arranged so as to face the hot roll. apparatus. 8. An endless belt, which is stretched around a stretchable support roll, is run through a hot roll whose axis is inclined with respect to the running direction of the endless belt and a pedestal, and the hot roll is moved in the width direction of the endless belt. A method for heat-setting the surface of an endless belt, which comprises heating and pressurizing the surface of the belt while spirally contacting the surface of the belt.